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-rw-r--r--src/mail/ngx_mail.c416
-rw-r--r--src/mail/ngx_mail.h313
-rw-r--r--src/mail/ngx_mail_auth_http_module.c1432
-rw-r--r--src/mail/ngx_mail_core_module.c772
-rw-r--r--src/mail/ngx_mail_handler.c1838
-rw-r--r--src/mail/ngx_mail_parse.c766
-rw-r--r--src/mail/ngx_mail_proxy_module.c994
-rw-r--r--src/mail/ngx_mail_ssl_module.c393
-rw-r--r--src/mail/ngx_mail_ssl_module.h47
9 files changed, 6971 insertions, 0 deletions
diff --git a/src/mail/ngx_mail.c b/src/mail/ngx_mail.c
new file mode 100644
index 000000000..56e9b04c1
--- /dev/null
+++ b/src/mail/ngx_mail.c
@@ -0,0 +1,416 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_mail.h>
+
+
+static char *ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+static int ngx_libc_cdecl ngx_mail_cmp_conf_in_addrs(const void *one,
+ const void *two);
+
+
+ngx_uint_t ngx_mail_max_module;
+
+
+static ngx_command_t ngx_mail_commands[] = {
+
+ { ngx_string("mail"),
+ NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
+ ngx_mail_block,
+ 0,
+ 0,
+ NULL },
+
+ { ngx_string("imap"),
+ NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
+ ngx_mail_block,
+ 0,
+ 0,
+ NULL },
+
+ ngx_null_command
+};
+
+
+static ngx_core_module_t ngx_mail_module_ctx = {
+ ngx_string("mail"),
+ NULL,
+ NULL
+};
+
+
+ngx_module_t ngx_mail_module = {
+ NGX_MODULE_V1,
+ &ngx_mail_module_ctx, /* module context */
+ ngx_mail_commands, /* module directives */
+ NGX_CORE_MODULE, /* module type */
+ NULL, /* init master */
+ NULL, /* init module */
+ NULL, /* init process */
+ NULL, /* init thread */
+ NULL, /* exit thread */
+ NULL, /* exit process */
+ NULL, /* exit master */
+ NGX_MODULE_V1_PADDING
+};
+
+
+static char *
+ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ char *rv;
+ u_char *text;
+ size_t len;
+ ngx_uint_t i, a, l, m, mi, s, p, last, bind_all, done;
+ ngx_conf_t pcf;
+ ngx_array_t in_ports;
+ ngx_listening_t *ls;
+ ngx_mail_listen_t *imls;
+ ngx_mail_module_t *module;
+ ngx_mail_in_port_t *imip;
+ ngx_mail_conf_ctx_t *ctx;
+ ngx_mail_conf_in_port_t *in_port;
+ ngx_mail_conf_in_addr_t *in_addr;
+ ngx_mail_core_srv_conf_t **cscfp;
+ ngx_mail_core_main_conf_t *cmcf;
+
+ if (cmd->name.data[0] == 'i') {
+ ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
+ "the \"imap\" directive is deprecated, "
+ "use the \"mail\" directive instead");
+ }
+
+ /* the main mail context */
+
+ ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t));
+ if (ctx == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ *(ngx_mail_conf_ctx_t **) conf = ctx;
+
+ /* count the number of the http modules and set up their indices */
+
+ ngx_mail_max_module = 0;
+ for (m = 0; ngx_modules[m]; m++) {
+ if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
+ continue;
+ }
+
+ ngx_modules[m]->ctx_index = ngx_mail_max_module++;
+ }
+
+
+ /* the mail main_conf context, it is the same in the all mail contexts */
+
+ ctx->main_conf = ngx_pcalloc(cf->pool,
+ sizeof(void *) * ngx_mail_max_module);
+ if (ctx->main_conf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+
+ /*
+ * the mail null srv_conf context, it is used to merge
+ * the server{}s' srv_conf's
+ */
+
+ ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module);
+ if (ctx->srv_conf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+
+ /*
+ * create the main_conf's, the null srv_conf's, and the null loc_conf's
+ * of the all mail modules
+ */
+
+ for (m = 0; ngx_modules[m]; m++) {
+ if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
+ continue;
+ }
+
+ module = ngx_modules[m]->ctx;
+ mi = ngx_modules[m]->ctx_index;
+
+ if (module->create_main_conf) {
+ ctx->main_conf[mi] = module->create_main_conf(cf);
+ if (ctx->main_conf[mi] == NULL) {
+ return NGX_CONF_ERROR;
+ }
+ }
+
+ if (module->create_srv_conf) {
+ ctx->srv_conf[mi] = module->create_srv_conf(cf);
+ if (ctx->srv_conf[mi] == NULL) {
+ return NGX_CONF_ERROR;
+ }
+ }
+ }
+
+
+ /* parse inside the mail{} block */
+
+ pcf = *cf;
+ cf->ctx = ctx;
+
+ cf->module_type = NGX_MAIL_MODULE;
+ cf->cmd_type = NGX_MAIL_MAIN_CONF;
+ rv = ngx_conf_parse(cf, NULL);
+
+ if (rv != NGX_CONF_OK) {
+ *cf = pcf;
+ return rv;
+ }
+
+
+ /* init mail{} main_conf's, merge the server{}s' srv_conf's */
+
+ cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index];
+ cscfp = cmcf->servers.elts;
+
+ for (m = 0; ngx_modules[m]; m++) {
+ if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
+ continue;
+ }
+
+ module = ngx_modules[m]->ctx;
+ mi = ngx_modules[m]->ctx_index;
+
+ /* init mail{} main_conf's */
+
+ if (module->init_main_conf) {
+ rv = module->init_main_conf(cf, ctx->main_conf[mi]);
+ if (rv != NGX_CONF_OK) {
+ *cf = pcf;
+ return rv;
+ }
+ }
+
+ for (s = 0; s < cmcf->servers.nelts; s++) {
+
+ /* merge the server{}s' srv_conf's */
+
+ if (module->merge_srv_conf) {
+ rv = module->merge_srv_conf(cf,
+ ctx->srv_conf[mi],
+ cscfp[s]->ctx->srv_conf[mi]);
+ if (rv != NGX_CONF_OK) {
+ *cf = pcf;
+ return rv;
+ }
+ }
+ }
+ }
+
+ /* mail{}'s cf->ctx was needed while the configuration merging */
+
+ *cf = pcf;
+
+
+ if (ngx_array_init(&in_ports, cf->temp_pool, 4,
+ sizeof(ngx_mail_conf_in_port_t))
+ != NGX_OK)
+ {
+ return NGX_CONF_ERROR;
+ }
+
+ imls = cmcf->listen.elts;
+
+ for (l = 0; l < cmcf->listen.nelts; l++) {
+
+ /* AF_INET only */
+
+ in_port = in_ports.elts;
+ for (p = 0; p < in_ports.nelts; p++) {
+ if (in_port[p].port == imls[l].port) {
+ in_port = &in_port[p];
+ goto found;
+ }
+ }
+
+ in_port = ngx_array_push(&in_ports);
+ if (in_port == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ in_port->port = imls[l].port;
+
+ if (ngx_array_init(&in_port->addrs, cf->temp_pool, 2,
+ sizeof(ngx_mail_conf_in_addr_t))
+ != NGX_OK)
+ {
+ return NGX_CONF_ERROR;
+ }
+
+ found:
+
+ in_addr = ngx_array_push(&in_port->addrs);
+ if (in_addr == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ in_addr->addr = imls[l].addr;
+ in_addr->ctx = imls[l].ctx;
+ in_addr->bind = imls[l].bind;
+ }
+
+ /* optimize the lists of ports and addresses */
+
+ /* AF_INET only */
+
+ in_port = in_ports.elts;
+ for (p = 0; p < in_ports.nelts; p++) {
+
+ ngx_qsort(in_port[p].addrs.elts, (size_t) in_port[p].addrs.nelts,
+ sizeof(ngx_mail_conf_in_addr_t), ngx_mail_cmp_conf_in_addrs);
+
+ in_addr = in_port[p].addrs.elts;
+ last = in_port[p].addrs.nelts;
+
+ /*
+ * if there is the binding to the "*:port" then we need to bind()
+ * to the "*:port" only and ignore the other bindings
+ */
+
+ if (in_addr[last - 1].addr == INADDR_ANY) {
+ in_addr[last - 1].bind = 1;
+ bind_all = 0;
+
+ } else {
+ bind_all = 1;
+ }
+
+ for (a = 0; a < last; /* void */ ) {
+
+ if (!bind_all && !in_addr[a].bind) {
+ a++;
+ continue;
+ }
+
+ ls = ngx_listening_inet_stream_socket(cf, in_addr[a].addr,
+ in_port[p].port);
+ if (ls == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ ls->backlog = -1;
+ ls->rcvbuf = -1;
+ ls->sndbuf = -1;
+
+ ls->addr_ntop = 1;
+ ls->handler = ngx_mail_init_connection;
+ ls->pool_size = 256;
+
+ /* STUB */
+ ls->log = *cf->cycle->new_log;
+ ls->log.data = &ls->addr_text;
+ ls->log.handler = ngx_accept_log_error;
+ /**/
+
+ imip = ngx_palloc(cf->pool, sizeof(ngx_mail_in_port_t));
+ if (imip == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ ls->servers = imip;
+
+ in_addr = in_port[p].addrs.elts;
+
+ if (in_addr[a].bind && in_addr[a].addr != INADDR_ANY) {
+ imip->naddrs = 1;
+ done = 0;
+
+ } else if (in_port[p].addrs.nelts > 1
+ && in_addr[last - 1].addr == INADDR_ANY)
+ {
+ imip->naddrs = last;
+ done = 1;
+
+ } else {
+ imip->naddrs = 1;
+ done = 0;
+ }
+
+#if 0
+ ngx_log_error(NGX_LOG_ALERT, cf->log, 0,
+ "%ui: %V %d %ui %ui",
+ a, &ls->addr_text, in_addr[a].bind,
+ imip->naddrs, last);
+#endif
+
+ imip->addrs = ngx_pcalloc(cf->pool,
+ imip->naddrs * sizeof(ngx_mail_in_addr_t));
+ if (imip->addrs == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ for (i = 0; i < imip->naddrs; i++) {
+ imip->addrs[i].addr = in_addr[i].addr;
+ imip->addrs[i].ctx = in_addr[i].ctx;
+
+ text = ngx_palloc(cf->pool,
+ INET_ADDRSTRLEN - 1 + sizeof(":65535") - 1);
+ if (text == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ len = ngx_inet_ntop(AF_INET, &in_addr[i].addr, text,
+ INET_ADDRSTRLEN);
+
+ len = ngx_sprintf(text + len, ":%d", in_port[p].port) - text;
+
+ imip->addrs[i].addr_text.len = len;
+ imip->addrs[i].addr_text.data = text;
+ }
+
+ if (done) {
+ break;
+ }
+
+ in_addr++;
+ in_port[p].addrs.elts = in_addr;
+ last--;
+
+ a = 0;
+ }
+ }
+
+ return NGX_CONF_OK;
+}
+
+
+static int ngx_libc_cdecl
+ngx_mail_cmp_conf_in_addrs(const void *one, const void *two)
+{
+ ngx_mail_conf_in_addr_t *first, *second;
+
+ first = (ngx_mail_conf_in_addr_t *) one;
+ second = (ngx_mail_conf_in_addr_t *) two;
+
+ if (first->addr == INADDR_ANY) {
+ /* the INADDR_ANY must be the last resort, shift it to the end */
+ return 1;
+ }
+
+ if (first->bind && !second->bind) {
+ /* shift explicit bind()ed addresses to the start */
+ return -1;
+ }
+
+ if (!first->bind && second->bind) {
+ /* shift explicit bind()ed addresses to the start */
+ return 1;
+ }
+
+ /* do not sort by default */
+
+ return 0;
+}
diff --git a/src/mail/ngx_mail.h b/src/mail/ngx_mail.h
new file mode 100644
index 000000000..478662a04
--- /dev/null
+++ b/src/mail/ngx_mail.h
@@ -0,0 +1,313 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_MAIL_H_INCLUDED_
+#define _NGX_MAIL_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_event_connect.h>
+
+#if (NGX_MAIL_SSL)
+#include <ngx_mail_ssl_module.h>
+#endif
+
+
+
+typedef struct {
+ void **main_conf;
+ void **srv_conf;
+} ngx_mail_conf_ctx_t;
+
+
+typedef struct {
+ in_addr_t addr;
+ in_port_t port;
+ int family;
+
+ /* server ctx */
+ ngx_mail_conf_ctx_t *ctx;
+
+ unsigned bind:1;
+} ngx_mail_listen_t;
+
+
+typedef struct {
+ in_addr_t addr;
+ ngx_mail_conf_ctx_t *ctx;
+ ngx_str_t addr_text;
+} ngx_mail_in_addr_t;
+
+
+typedef struct {
+ ngx_mail_in_addr_t *addrs; /* array of ngx_mail_in_addr_t */
+ ngx_uint_t naddrs;
+} ngx_mail_in_port_t;
+
+
+typedef struct {
+ in_port_t port;
+ ngx_array_t addrs; /* array of ngx_mail_conf_in_addr_t */
+} ngx_mail_conf_in_port_t;
+
+
+typedef struct {
+ in_addr_t addr;
+ ngx_mail_conf_ctx_t *ctx;
+ unsigned bind:1;
+} ngx_mail_conf_in_addr_t;
+
+
+typedef struct {
+ ngx_array_t servers; /* ngx_mail_core_srv_conf_t */
+ ngx_array_t listen; /* ngx_mail_listen_t */
+} ngx_mail_core_main_conf_t;
+
+
+#define NGX_MAIL_POP3_PROTOCOL 0
+#define NGX_MAIL_IMAP_PROTOCOL 1
+#define NGX_MAIL_SMTP_PROTOCOL 2
+
+typedef struct {
+ ngx_msec_t timeout;
+
+ size_t imap_client_buffer_size;
+
+ ngx_uint_t protocol;
+
+ ngx_flag_t so_keepalive;
+
+ ngx_str_t pop3_capability;
+ ngx_str_t pop3_starttls_capability;
+ ngx_str_t pop3_starttls_only_capability;
+ ngx_str_t pop3_auth_capability;
+
+ ngx_str_t imap_capability;
+ ngx_str_t imap_starttls_capability;
+ ngx_str_t imap_starttls_only_capability;
+
+ ngx_str_t smtp_capability;
+
+ ngx_str_t server_name;
+ ngx_str_t smtp_server_name;
+ ngx_str_t smtp_greeting;
+
+ ngx_uint_t pop3_auth_methods;
+ ngx_uint_t smtp_auth_methods;
+
+ ngx_array_t pop3_capabilities;
+ ngx_array_t imap_capabilities;
+ ngx_array_t smtp_capabilities;
+
+ /* server ctx */
+ ngx_mail_conf_ctx_t *ctx;
+} ngx_mail_core_srv_conf_t;
+
+
+typedef struct {
+ void *(*create_main_conf)(ngx_conf_t *cf);
+ char *(*init_main_conf)(ngx_conf_t *cf, void *conf);
+
+ void *(*create_srv_conf)(ngx_conf_t *cf);
+ char *(*merge_srv_conf)(ngx_conf_t *cf, void *prev,
+ void *conf);
+} ngx_mail_module_t;
+
+
+typedef enum {
+ ngx_pop3_start = 0,
+ ngx_pop3_user,
+ ngx_pop3_passwd,
+ ngx_pop3_auth_login_username,
+ ngx_pop3_auth_login_password,
+ ngx_pop3_auth_plain,
+ ngx_pop3_auth_cram_md5
+} ngx_po3_state_e;
+
+
+typedef enum {
+ ngx_imap_start = 0,
+ ngx_imap_login,
+ ngx_imap_user,
+ ngx_imap_passwd
+} ngx_imap_state_e;
+
+
+typedef enum {
+ ngx_smtp_start = 0,
+ ngx_smtp_auth_login_username,
+ ngx_smtp_auth_login_password,
+ ngx_smtp_auth_plain,
+ ngx_smtp_auth_cram_md5,
+ ngx_smtp_helo,
+ ngx_smtp_noxclient,
+ ngx_smtp_xclient
+} ngx_smtp_state_e;
+
+
+typedef struct {
+ ngx_peer_connection_t upstream;
+ ngx_buf_t *buffer;
+} ngx_mail_proxy_ctx_t;
+
+
+typedef struct {
+ uint32_t signature; /* "MAIL" */
+
+ ngx_connection_t *connection;
+
+ ngx_str_t out;
+ ngx_buf_t *buffer;
+
+ void **ctx;
+ void **main_conf;
+ void **srv_conf;
+
+ ngx_mail_proxy_ctx_t *proxy;
+
+ ngx_uint_t mail_state;
+
+ unsigned blocked:1;
+ unsigned quit:1;
+ unsigned protocol:2;
+ unsigned quoted:1;
+ unsigned backslash:1;
+ unsigned no_sync_literal:1;
+ unsigned starttls:1;
+ unsigned esmtp:1;
+ unsigned auth_method:2;
+ unsigned auth_wait:1;
+
+ ngx_str_t login;
+ ngx_str_t passwd;
+
+ ngx_str_t salt;
+ ngx_str_t tag;
+ ngx_str_t tagged_line;
+
+ ngx_str_t *addr_text;
+ ngx_str_t smtp_helo;
+
+ ngx_uint_t command;
+ ngx_array_t args;
+
+ ngx_uint_t login_attempt;
+
+ /* used to parse IMAP/POP3/SMTP command */
+
+ ngx_uint_t state;
+ u_char *cmd_start;
+ u_char *arg_start;
+ u_char *arg_end;
+ ngx_uint_t literal_len;
+} ngx_mail_session_t;
+
+
+typedef struct {
+ ngx_str_t *client;
+ ngx_mail_session_t *session;
+} ngx_mail_log_ctx_t;
+
+
+#define NGX_POP3_USER 1
+#define NGX_POP3_PASS 2
+#define NGX_POP3_CAPA 3
+#define NGX_POP3_QUIT 4
+#define NGX_POP3_NOOP 5
+#define NGX_POP3_STLS 6
+#define NGX_POP3_APOP 7
+#define NGX_POP3_AUTH 8
+#define NGX_POP3_STAT 9
+#define NGX_POP3_LIST 10
+#define NGX_POP3_RETR 11
+#define NGX_POP3_DELE 12
+#define NGX_POP3_RSET 13
+#define NGX_POP3_TOP 14
+#define NGX_POP3_UIDL 15
+
+
+#define NGX_IMAP_LOGIN 1
+#define NGX_IMAP_LOGOUT 2
+#define NGX_IMAP_CAPABILITY 3
+#define NGX_IMAP_NOOP 4
+#define NGX_IMAP_STARTTLS 5
+
+#define NGX_IMAP_NEXT 6
+
+
+#define NGX_SMTP_HELO 1
+#define NGX_SMTP_EHLO 2
+#define NGX_SMTP_AUTH 3
+#define NGX_SMTP_QUIT 4
+#define NGX_SMTP_NOOP 5
+#define NGX_SMTP_MAIL 6
+#define NGX_SMTP_RSET 7
+
+
+#define NGX_MAIL_AUTH_PLAIN 0
+#define NGX_MAIL_AUTH_LOGIN 1
+#define NGX_MAIL_AUTH_APOP 2
+#define NGX_MAIL_AUTH_CRAM_MD5 3
+
+
+#define NGX_MAIL_AUTH_PLAIN_ENABLED 0x0002
+#define NGX_MAIL_AUTH_LOGIN_ENABLED 0x0004
+#define NGX_MAIL_AUTH_APOP_ENABLED 0x0008
+#define NGX_MAIL_AUTH_CRAM_MD5_ENABLED 0x0010
+
+
+#define NGX_MAIL_PARSE_INVALID_COMMAND 20
+
+
+#define NGX_MAIL_MODULE 0x4C49414D /* "MAIL" */
+
+#define NGX_MAIL_MAIN_CONF 0x02000000
+#define NGX_MAIL_SRV_CONF 0x04000000
+
+
+#define NGX_MAIL_MAIN_CONF_OFFSET offsetof(ngx_mail_conf_ctx_t, main_conf)
+#define NGX_MAIL_SRV_CONF_OFFSET offsetof(ngx_mail_conf_ctx_t, srv_conf)
+
+
+#define ngx_mail_get_module_ctx(s, module) (s)->ctx[module.ctx_index]
+#define ngx_mail_set_ctx(s, c, module) s->ctx[module.ctx_index] = c;
+#define ngx_mail_delete_ctx(s, module) s->ctx[module.ctx_index] = NULL;
+
+
+#define ngx_mail_get_module_main_conf(s, module) \
+ (s)->main_conf[module.ctx_index]
+#define ngx_mail_get_module_srv_conf(s, module) (s)->srv_conf[module.ctx_index]
+
+#define ngx_mail_conf_get_module_main_conf(cf, module) \
+ ((ngx_mail_conf_ctx_t *) cf->ctx)->main_conf[module.ctx_index]
+
+
+void ngx_mail_init_connection(ngx_connection_t *c);
+void ngx_mail_send(ngx_event_t *wev);
+void ngx_pop3_auth_state(ngx_event_t *rev);
+void ngx_imap_auth_state(ngx_event_t *rev);
+void ngx_smtp_auth_state(ngx_event_t *rev);
+void ngx_mail_close_connection(ngx_connection_t *c);
+void ngx_mail_session_internal_server_error(ngx_mail_session_t *s);
+
+ngx_int_t ngx_pop3_parse_command(ngx_mail_session_t *s);
+ngx_int_t ngx_imap_parse_command(ngx_mail_session_t *s);
+ngx_int_t ngx_smtp_parse_command(ngx_mail_session_t *s);
+
+
+/* STUB */
+void ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_peer_addr_t *peer);
+void ngx_mail_auth_http_init(ngx_mail_session_t *s);
+/**/
+
+
+extern ngx_uint_t ngx_mail_max_module;
+extern ngx_module_t ngx_mail_core_module;
+
+
+#endif /* _NGX_MAIL_H_INCLUDED_ */
diff --git a/src/mail/ngx_mail_auth_http_module.c b/src/mail/ngx_mail_auth_http_module.c
new file mode 100644
index 000000000..febeb55ff
--- /dev/null
+++ b/src/mail/ngx_mail_auth_http_module.c
@@ -0,0 +1,1432 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_event_connect.h>
+#include <ngx_mail.h>
+
+
+typedef struct {
+ ngx_peer_addr_t *peer;
+
+ ngx_msec_t timeout;
+
+ ngx_str_t host_header;
+ ngx_str_t uri;
+ ngx_str_t header;
+
+ ngx_array_t *headers;
+} ngx_mail_auth_http_conf_t;
+
+
+typedef struct ngx_mail_auth_http_ctx_s ngx_mail_auth_http_ctx_t;
+
+typedef void (*ngx_mail_auth_http_handler_pt)(ngx_mail_session_t *s,
+ ngx_mail_auth_http_ctx_t *ctx);
+
+struct ngx_mail_auth_http_ctx_s {
+ ngx_buf_t *request;
+ ngx_buf_t *response;
+ ngx_peer_connection_t peer;
+
+ ngx_mail_auth_http_handler_pt handler;
+
+ ngx_uint_t state;
+ ngx_uint_t hash; /* no needed ? */
+
+ u_char *header_name_start;
+ u_char *header_name_end;
+ u_char *header_start;
+ u_char *header_end;
+
+ ngx_str_t addr;
+ ngx_str_t port;
+ ngx_str_t err;
+ ngx_str_t errmsg;
+ ngx_str_t errcode;
+
+ time_t sleep;
+
+ ngx_pool_t *pool;
+};
+
+
+static void ngx_mail_auth_http_write_handler(ngx_event_t *wev);
+static void ngx_mail_auth_http_read_handler(ngx_event_t *rev);
+static void ngx_mail_auth_http_ignore_status_line(ngx_mail_session_t *s,
+ ngx_mail_auth_http_ctx_t *ctx);
+static void ngx_mail_auth_http_process_headers(ngx_mail_session_t *s,
+ ngx_mail_auth_http_ctx_t *ctx);
+static void ngx_mail_auth_sleep_handler(ngx_event_t *rev);
+static ngx_int_t ngx_mail_auth_http_parse_header_line(ngx_mail_session_t *s,
+ ngx_mail_auth_http_ctx_t *ctx);
+static void ngx_mail_auth_http_block_read(ngx_event_t *rev);
+static void ngx_mail_auth_http_dummy_handler(ngx_event_t *ev);
+static ngx_buf_t *ngx_mail_auth_http_create_request(ngx_mail_session_t *s,
+ ngx_pool_t *pool, ngx_mail_auth_http_conf_t *ahcf);
+static ngx_int_t ngx_mail_auth_http_escape(ngx_pool_t *pool, ngx_str_t *text,
+ ngx_str_t *escaped);
+
+static void *ngx_mail_auth_http_create_conf(ngx_conf_t *cf);
+static char *ngx_mail_auth_http_merge_conf(ngx_conf_t *cf, void *parent,
+ void *child);
+static char *ngx_mail_auth_http(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+static char *ngx_mail_auth_http_header(ngx_conf_t *cf, ngx_command_t *cmd,
+ void *conf);
+
+
+static ngx_command_t ngx_mail_auth_http_commands[] = {
+
+ { ngx_string("auth_http"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_mail_auth_http,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ 0,
+ NULL },
+
+ { ngx_string("auth_http_timeout"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_msec_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_auth_http_conf_t, timeout),
+ NULL },
+
+ { ngx_string("auth_http_header"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE2,
+ ngx_mail_auth_http_header,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ 0,
+ NULL },
+
+ ngx_null_command
+};
+
+
+static ngx_mail_module_t ngx_mail_auth_http_module_ctx = {
+ NULL, /* create main configuration */
+ NULL, /* init main configuration */
+
+ ngx_mail_auth_http_create_conf, /* create server configuration */
+ ngx_mail_auth_http_merge_conf /* merge server configuration */
+};
+
+
+ngx_module_t ngx_mail_auth_http_module = {
+ NGX_MODULE_V1,
+ &ngx_mail_auth_http_module_ctx, /* module context */
+ ngx_mail_auth_http_commands, /* module directives */
+ NGX_MAIL_MODULE, /* module type */
+ NULL, /* init master */
+ NULL, /* init module */
+ NULL, /* init process */
+ NULL, /* init thread */
+ NULL, /* exit thread */
+ NULL, /* exit process */
+ NULL, /* exit master */
+ NGX_MODULE_V1_PADDING
+};
+
+
+static char *ngx_mail_auth_http_protocol[] = { "pop3", "imap", "smtp" };
+static ngx_str_t ngx_mail_auth_http_method[] = {
+ ngx_string("plain"),
+ ngx_string("plain"),
+ ngx_string("apop"),
+ ngx_string("cram-md5")
+};
+
+static ngx_str_t ngx_mail_smtp_errcode = ngx_string("535 5.7.0");
+
+void
+ngx_mail_auth_http_init(ngx_mail_session_t *s)
+{
+ ngx_int_t rc;
+ ngx_pool_t *pool;
+ ngx_mail_auth_http_ctx_t *ctx;
+ ngx_mail_auth_http_conf_t *ahcf;
+
+ s->connection->log->action = "in http auth state";
+
+ pool = ngx_create_pool(2048, s->connection->log);
+ if (pool == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ctx = ngx_pcalloc(pool, sizeof(ngx_mail_auth_http_ctx_t));
+ if (ctx == NULL) {
+ ngx_destroy_pool(pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ctx->pool = pool;
+
+ ahcf = ngx_mail_get_module_srv_conf(s, ngx_mail_auth_http_module);
+
+ ctx->request = ngx_mail_auth_http_create_request(s, pool, ahcf);
+ if (ctx->request == NULL) {
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_mail_set_ctx(s, ctx, ngx_mail_auth_http_module);
+
+ ctx->peer.sockaddr = ahcf->peer->sockaddr;
+ ctx->peer.socklen = ahcf->peer->socklen;
+ ctx->peer.name = &ahcf->peer->name;
+ ctx->peer.get = ngx_event_get_peer;
+ ctx->peer.log = s->connection->log;
+ ctx->peer.log_error = NGX_ERROR_ERR;
+
+ rc = ngx_event_connect_peer(&ctx->peer);
+
+ if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) {
+ if (ctx->peer.connection) {
+ ngx_close_connection(ctx->peer.connection);
+ }
+
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ctx->peer.connection->data = s;
+ ctx->peer.connection->pool = s->connection->pool;
+
+ s->connection->read->handler = ngx_mail_auth_http_block_read;
+ ctx->peer.connection->read->handler = ngx_mail_auth_http_read_handler;
+ ctx->peer.connection->write->handler = ngx_mail_auth_http_write_handler;
+
+ ctx->handler = ngx_mail_auth_http_ignore_status_line;
+
+ ngx_add_timer(ctx->peer.connection->read, ahcf->timeout);
+ ngx_add_timer(ctx->peer.connection->write, ahcf->timeout);
+
+ if (rc == NGX_OK) {
+ ngx_mail_auth_http_write_handler(ctx->peer.connection->write);
+ return;
+ }
+}
+
+
+static void
+ngx_mail_auth_http_write_handler(ngx_event_t *wev)
+{
+ ssize_t n, size;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_auth_http_ctx_t *ctx;
+ ngx_mail_auth_http_conf_t *ahcf;
+
+ c = wev->data;
+ s = c->data;
+
+ ctx = ngx_mail_get_module_ctx(s, ngx_mail_auth_http_module);
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, wev->log, 0,
+ "mail auth http write handler");
+
+ if (wev->timedout) {
+ ngx_log_error(NGX_LOG_ERR, wev->log, NGX_ETIMEDOUT,
+ "auth http server %V timed out", ctx->peer.name);
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ size = ctx->request->last - ctx->request->pos;
+
+ n = ngx_send(c, ctx->request->pos, size);
+
+ if (n == NGX_ERROR) {
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (n > 0) {
+ ctx->request->pos += n;
+
+ if (n == size) {
+ wev->handler = ngx_mail_auth_http_dummy_handler;
+
+ if (wev->timer_set) {
+ ngx_del_timer(wev);
+ }
+
+ if (ngx_handle_write_event(wev, 0) == NGX_ERROR) {
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ }
+
+ return;
+ }
+ }
+
+ if (!wev->timer_set) {
+ ahcf = ngx_mail_get_module_srv_conf(s, ngx_mail_auth_http_module);
+ ngx_add_timer(wev, ahcf->timeout);
+ }
+}
+
+
+static void
+ngx_mail_auth_http_read_handler(ngx_event_t *rev)
+{
+ ssize_t n, size;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_auth_http_ctx_t *ctx;
+
+ c = rev->data;
+ s = c->data;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
+ "mail auth http read handler");
+
+ ctx = ngx_mail_get_module_ctx(s, ngx_mail_auth_http_module);
+
+ if (rev->timedout) {
+ ngx_log_error(NGX_LOG_ERR, rev->log, NGX_ETIMEDOUT,
+ "auth http server %V timed out", ctx->peer.name);
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (ctx->response == NULL) {
+ ctx->response = ngx_create_temp_buf(ctx->pool, 1024);
+ if (ctx->response == NULL) {
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+ }
+
+ size = ctx->response->end - ctx->response->last;
+
+ n = ngx_recv(c, ctx->response->pos, size);
+
+ if (n > 0) {
+ ctx->response->last += n;
+
+ ctx->handler(s, ctx);
+ return;
+ }
+
+ if (n == NGX_AGAIN) {
+ return;
+ }
+
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+}
+
+
+static void
+ngx_mail_auth_http_ignore_status_line(ngx_mail_session_t *s,
+ ngx_mail_auth_http_ctx_t *ctx)
+{
+ u_char *p, ch;
+ enum {
+ sw_start = 0,
+ sw_H,
+ sw_HT,
+ sw_HTT,
+ sw_HTTP,
+ sw_skip,
+ sw_almost_done
+ } state;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "mail auth http process status line");
+
+ state = ctx->state;
+
+ for (p = ctx->response->pos; p < ctx->response->last; p++) {
+ ch = *p;
+
+ switch (state) {
+
+ /* "HTTP/" */
+ case sw_start:
+ if (ch == 'H') {
+ state = sw_H;
+ break;
+ }
+ goto next;
+
+ case sw_H:
+ if (ch == 'T') {
+ state = sw_HT;
+ break;
+ }
+ goto next;
+
+ case sw_HT:
+ if (ch == 'T') {
+ state = sw_HTT;
+ break;
+ }
+ goto next;
+
+ case sw_HTT:
+ if (ch == 'P') {
+ state = sw_HTTP;
+ break;
+ }
+ goto next;
+
+ case sw_HTTP:
+ if (ch == '/') {
+ state = sw_skip;
+ break;
+ }
+ goto next;
+
+ /* any text until end of line */
+ case sw_skip:
+ switch (ch) {
+ case CR:
+ state = sw_almost_done;
+
+ break;
+ case LF:
+ goto done;
+ }
+ break;
+
+ /* end of status line */
+ case sw_almost_done:
+ if (ch == LF) {
+ goto done;
+ }
+
+ ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
+ "auth http server &V sent invalid response",
+ ctx->peer.name);
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+ }
+
+ ctx->response->pos = p;
+ ctx->state = state;
+
+ return;
+
+next:
+
+ p = ctx->response->start - 1;
+
+done:
+
+ ctx->response->pos = p + 1;
+ ctx->state = 0;
+ ctx->handler = ngx_mail_auth_http_process_headers;
+ ctx->handler(s, ctx);
+}
+
+
+static void
+ngx_mail_auth_http_process_headers(ngx_mail_session_t *s,
+ ngx_mail_auth_http_ctx_t *ctx)
+{
+ u_char *p;
+ time_t timer;
+ size_t len, size;
+ ngx_int_t rc, port, n;
+ ngx_peer_addr_t *peer;
+ struct sockaddr_in *sin;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "mail auth http process headers");
+
+ for ( ;; ) {
+ rc = ngx_mail_auth_http_parse_header_line(s, ctx);
+
+ if (rc == NGX_OK) {
+
+#if (NGX_DEBUG)
+ {
+ ngx_str_t key, value;
+
+ key.len = ctx->header_name_end - ctx->header_name_start;
+ key.data = ctx->header_name_start;
+ value.len = ctx->header_end - ctx->header_start;
+ value.data = ctx->header_start;
+
+ ngx_log_debug2(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "mail auth http header: \"%V: %V\"",
+ &key, &value);
+ }
+#endif
+
+ len = ctx->header_name_end - ctx->header_name_start;
+
+ if (len == sizeof("Auth-Status") - 1
+ && ngx_strncasecmp(ctx->header_name_start,
+ (u_char *) "Auth-Status",
+ sizeof("Auth-Status") - 1)
+ == 0)
+ {
+ len = ctx->header_end - ctx->header_start;
+
+ if (len == 2
+ && ctx->header_start[0] == 'O'
+ && ctx->header_start[1] == 'K')
+ {
+ continue;
+ }
+
+ if (len == 4
+ && ctx->header_start[0] == 'W'
+ && ctx->header_start[1] == 'A'
+ && ctx->header_start[2] == 'I'
+ && ctx->header_start[3] == 'T')
+ {
+ s->auth_wait = 1;
+ continue;
+ }
+
+ ctx->errmsg.len = len;
+ ctx->errmsg.data = ctx->header_start;
+
+ switch (s->protocol) {
+
+ case NGX_MAIL_POP3_PROTOCOL:
+ size = sizeof("-ERR ") - 1 + len + sizeof(CRLF) - 1;
+ break;
+
+ case NGX_MAIL_IMAP_PROTOCOL:
+ size = s->tag.len + sizeof("NO ") - 1 + len
+ + sizeof(CRLF) - 1;
+ break;
+
+ default: /* NGX_MAIL_SMTP_PROTOCOL */
+ ctx->err = ctx->errmsg;
+ continue;
+ }
+
+ p = ngx_pcalloc(s->connection->pool, size);
+ if (p == NULL) {
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ctx->err.data = p;
+
+ switch (s->protocol) {
+
+ case NGX_MAIL_POP3_PROTOCOL:
+ *p++ = '-'; *p++ = 'E'; *p++ = 'R'; *p++ = 'R'; *p++ = ' ';
+ break;
+
+ case NGX_MAIL_IMAP_PROTOCOL:
+ p = ngx_cpymem(p, s->tag.data, s->tag.len);
+ *p++ = 'N'; *p++ = 'O'; *p++ = ' ';
+ break;
+
+ default: /* NGX_MAIL_SMTP_PROTOCOL */
+ break;
+ }
+
+ p = ngx_cpymem(p, ctx->header_start, len);
+ *p++ = CR; *p++ = LF;
+
+ ctx->err.len = p - ctx->err.data;
+
+ continue;
+ }
+
+ if (len == sizeof("Auth-Server") - 1
+ && ngx_strncasecmp(ctx->header_name_start,
+ (u_char *) "Auth-Server",
+ sizeof("Auth-Server") - 1)
+ == 0)
+ {
+ ctx->addr.len = ctx->header_end - ctx->header_start;
+ ctx->addr.data = ctx->header_start;
+
+ continue;
+ }
+
+ if (len == sizeof("Auth-Port") - 1
+ && ngx_strncasecmp(ctx->header_name_start,
+ (u_char *) "Auth-Port",
+ sizeof("Auth-Port") - 1)
+ == 0)
+ {
+ ctx->port.len = ctx->header_end - ctx->header_start;
+ ctx->port.data = ctx->header_start;
+
+ continue;
+ }
+
+ if (len == sizeof("Auth-User") - 1
+ && ngx_strncasecmp(ctx->header_name_start,
+ (u_char *) "Auth-User",
+ sizeof("Auth-User") - 1)
+ == 0)
+ {
+ s->login.len = ctx->header_end - ctx->header_start;
+
+ s->login.data = ngx_palloc(s->connection->pool, s->login.len);
+ if (s->login.data == NULL) {
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->login.data, ctx->header_start, s->login.len);
+
+ continue;
+ }
+
+ if (len == sizeof("Auth-Pass") - 1
+ && ngx_strncasecmp(ctx->header_name_start,
+ (u_char *) "Auth-Pass",
+ sizeof("Auth-Pass") - 1)
+ == 0)
+ {
+ s->passwd.len = ctx->header_end - ctx->header_start;
+
+ s->passwd.data = ngx_palloc(s->connection->pool, s->passwd.len);
+ if (s->passwd.data == NULL) {
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->passwd.data, ctx->header_start, s->passwd.len);
+
+ continue;
+ }
+
+ if (len == sizeof("Auth-Wait") - 1
+ && ngx_strncasecmp(ctx->header_name_start,
+ (u_char *) "Auth-Wait",
+ sizeof("Auth-Wait") - 1)
+ == 0)
+ {
+ n = ngx_atoi(ctx->header_start,
+ ctx->header_end - ctx->header_start);
+
+ if (n != NGX_ERROR) {
+ ctx->sleep = n;
+ }
+
+ continue;
+ }
+
+ if (len == sizeof("Auth-Error-Code") - 1
+ && ngx_strncasecmp(ctx->header_name_start,
+ (u_char *) "Auth-Error-Code",
+ sizeof("Auth-Error-Code") - 1)
+ == 0)
+ {
+ ctx->errcode.len = ctx->header_end - ctx->header_start;
+
+ ctx->errcode.data = ngx_palloc(s->connection->pool,
+ ctx->errcode.len);
+ if (ctx->errcode.data == NULL) {
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(ctx->errcode.data, ctx->header_start,
+ ctx->errcode.len);
+
+ continue;
+ }
+
+ /* ignore other headers */
+
+ continue;
+ }
+
+ if (rc == NGX_DONE) {
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "mail auth http header done");
+
+ ngx_close_connection(ctx->peer.connection);
+
+ if (ctx->err.len) {
+
+ ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
+ "client login failed: \"%V\"", &ctx->errmsg);
+
+ if (s->protocol == NGX_MAIL_SMTP_PROTOCOL) {
+
+ if (ctx->errcode.len == 0) {
+ ctx->errcode = ngx_mail_smtp_errcode;
+ }
+
+ ctx->err.len = ctx->errcode.len + ctx->errmsg.len
+ + sizeof(" " CRLF) - 1;
+
+ p = ngx_palloc(s->connection->pool, ctx->err.len);
+ if (p == NULL) {
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ctx->err.data = p;
+
+ p = ngx_cpymem(p, ctx->errcode.data, ctx->errcode.len);
+ *p++ = ' ';
+ p = ngx_cpymem(p, ctx->errmsg.data, ctx->errmsg.len);
+ *p++ = CR; *p = LF;
+ }
+
+ s->out = ctx->err;
+ timer = ctx->sleep;
+
+ ngx_destroy_pool(ctx->pool);
+
+ if (timer == 0) {
+ s->quit = 1;
+ ngx_mail_send(s->connection->write);
+ return;
+ }
+
+ ngx_add_timer(s->connection->read, timer * 1000);
+
+ s->connection->read->handler = ngx_mail_auth_sleep_handler;
+
+ return;
+ }
+
+ if (s->auth_wait) {
+ timer = ctx->sleep;
+
+ ngx_destroy_pool(ctx->pool);
+
+ if (timer == 0) {
+ ngx_mail_auth_http_init(s);
+ return;
+ }
+
+ ngx_add_timer(s->connection->read, timer * 1000);
+
+ s->connection->read->handler = ngx_mail_auth_sleep_handler;
+
+ return;
+ }
+
+ if (ctx->addr.len == 0 || ctx->port.len == 0) {
+ ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
+ "auth http server %V did not send server or port",
+ ctx->peer.name);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (s->passwd.data == NULL && s->protocol != NGX_MAIL_SMTP_PROTOCOL)
+ {
+ ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
+ "auth http server %V did not send password",
+ ctx->peer.name);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ peer = ngx_pcalloc(s->connection->pool, sizeof(ngx_peer_addr_t));
+ if (peer == NULL) {
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ sin = ngx_pcalloc(s->connection->pool, sizeof(struct sockaddr_in));
+ if (sin == NULL) {
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ sin->sin_family = AF_INET;
+
+ port = ngx_atoi(ctx->port.data, ctx->port.len);
+ if (port == NGX_ERROR || port < 1 || port > 65536) {
+ ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
+ "auth http server %V sent invalid server "
+ "port:\"%V\"",
+ ctx->peer.name, &ctx->port);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ sin->sin_port = htons((in_port_t) port);
+
+ ctx->addr.data[ctx->addr.len] = '\0';
+ sin->sin_addr.s_addr = inet_addr((char *) ctx->addr.data);
+ if (sin->sin_addr.s_addr == INADDR_NONE) {
+ ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
+ "auth http server %V sent invalid server "
+ "address:\"%V\"",
+ ctx->peer.name, &ctx->addr);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ peer->sockaddr = (struct sockaddr *) sin;
+ peer->socklen = sizeof(struct sockaddr_in);
+
+ len = ctx->addr.len + 1 + ctx->port.len;
+
+ peer->name.len = len;
+
+ peer->name.data = ngx_palloc(s->connection->pool, len);
+ if (peer->name.data == NULL) {
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ len = ctx->addr.len;
+
+ ngx_memcpy(peer->name.data, ctx->addr.data, len);
+
+ peer->name.data[len++] = ':';
+
+ ngx_memcpy(peer->name.data + len, ctx->port.data, ctx->port.len);
+
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_proxy_init(s, peer);
+
+ return;
+ }
+
+ if (rc == NGX_AGAIN ) {
+ return;
+ }
+
+ /* rc == NGX_ERROR */
+
+ ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
+ "auth http server %V sent invalid header in response",
+ ctx->peer.name);
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+
+ return;
+ }
+}
+
+
+static void
+ngx_mail_auth_sleep_handler(ngx_event_t *rev)
+{
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_core_srv_conf_t *cscf;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail auth sleep handler");
+
+ c = rev->data;
+ s = c->data;
+
+ if (rev->timedout) {
+
+ rev->timedout = 0;
+
+ if (s->auth_wait) {
+ s->auth_wait = 0;
+ ngx_mail_auth_http_init(s);
+ return;
+ }
+
+ switch (s->protocol) {
+
+ case NGX_MAIL_POP3_PROTOCOL:
+ s->mail_state = ngx_pop3_start;
+ s->connection->read->handler = ngx_pop3_auth_state;
+ break;
+
+ case NGX_MAIL_IMAP_PROTOCOL:
+ s->mail_state = ngx_imap_start;
+ s->connection->read->handler = ngx_imap_auth_state;
+ break;
+
+ default: /* NGX_MAIL_SMTP_PROTOCOL */
+ s->mail_state = ngx_smtp_start;
+ s->connection->read->handler = ngx_smtp_auth_state;
+ break;
+ }
+
+ s->auth_method = NGX_MAIL_AUTH_PLAIN;
+
+ c->log->action = "in auth state";
+
+ ngx_mail_send(s->connection->write);
+
+ if (c->destroyed) {
+ return;
+ }
+
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ ngx_add_timer(rev, cscf->timeout);
+
+ if (rev->ready) {
+ s->connection->read->handler(rev);
+ return;
+ }
+
+ if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
+ ngx_mail_close_connection(s->connection);
+ }
+
+ return;
+ }
+
+ if (rev->active) {
+ if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
+ ngx_mail_close_connection(s->connection);
+ }
+ }
+}
+
+
+static ngx_int_t
+ngx_mail_auth_http_parse_header_line(ngx_mail_session_t *s,
+ ngx_mail_auth_http_ctx_t *ctx)
+{
+ u_char c, ch, *p;
+ ngx_uint_t hash;
+ enum {
+ sw_start = 0,
+ sw_name,
+ sw_space_before_value,
+ sw_value,
+ sw_space_after_value,
+ sw_almost_done,
+ sw_header_almost_done
+ } state;
+
+ state = ctx->state;
+ hash = ctx->hash;
+
+ for (p = ctx->response->pos; p < ctx->response->last; p++) {
+ ch = *p;
+
+ switch (state) {
+
+ /* first char */
+ case sw_start:
+
+ switch (ch) {
+ case CR:
+ ctx->header_end = p;
+ state = sw_header_almost_done;
+ break;
+ case LF:
+ ctx->header_end = p;
+ goto header_done;
+ default:
+ state = sw_name;
+ ctx->header_name_start = p;
+
+ c = (u_char) (ch | 0x20);
+ if (c >= 'a' && c <= 'z') {
+ hash = c;
+ break;
+ }
+
+ if (ch >= '0' && ch <= '9') {
+ hash = ch;
+ break;
+ }
+
+ return NGX_ERROR;
+ }
+ break;
+
+ /* header name */
+ case sw_name:
+ c = (u_char) (ch | 0x20);
+ if (c >= 'a' && c <= 'z') {
+ hash += c;
+ break;
+ }
+
+ if (ch == ':') {
+ ctx->header_name_end = p;
+ state = sw_space_before_value;
+ break;
+ }
+
+ if (ch == '-') {
+ hash += ch;
+ break;
+ }
+
+ if (ch >= '0' && ch <= '9') {
+ hash += ch;
+ break;
+ }
+
+ if (ch == CR) {
+ ctx->header_name_end = p;
+ ctx->header_start = p;
+ ctx->header_end = p;
+ state = sw_almost_done;
+ break;
+ }
+
+ if (ch == LF) {
+ ctx->header_name_end = p;
+ ctx->header_start = p;
+ ctx->header_end = p;
+ goto done;
+ }
+
+ return NGX_ERROR;
+
+ /* space* before header value */
+ case sw_space_before_value:
+ switch (ch) {
+ case ' ':
+ break;
+ case CR:
+ ctx->header_start = p;
+ ctx->header_end = p;
+ state = sw_almost_done;
+ break;
+ case LF:
+ ctx->header_start = p;
+ ctx->header_end = p;
+ goto done;
+ default:
+ ctx->header_start = p;
+ state = sw_value;
+ break;
+ }
+ break;
+
+ /* header value */
+ case sw_value:
+ switch (ch) {
+ case ' ':
+ ctx->header_end = p;
+ state = sw_space_after_value;
+ break;
+ case CR:
+ ctx->header_end = p;
+ state = sw_almost_done;
+ break;
+ case LF:
+ ctx->header_end = p;
+ goto done;
+ }
+ break;
+
+ /* space* before end of header line */
+ case sw_space_after_value:
+ switch (ch) {
+ case ' ':
+ break;
+ case CR:
+ state = sw_almost_done;
+ break;
+ case LF:
+ goto done;
+ default:
+ state = sw_value;
+ break;
+ }
+ break;
+
+ /* end of header line */
+ case sw_almost_done:
+ switch (ch) {
+ case LF:
+ goto done;
+ default:
+ return NGX_ERROR;
+ }
+
+ /* end of header */
+ case sw_header_almost_done:
+ switch (ch) {
+ case LF:
+ goto header_done;
+ default:
+ return NGX_ERROR;
+ }
+ }
+ }
+
+ ctx->response->pos = p;
+ ctx->state = state;
+ ctx->hash = hash;
+
+ return NGX_AGAIN;
+
+done:
+
+ ctx->response->pos = p + 1;
+ ctx->state = sw_start;
+ ctx->hash = hash;
+
+ return NGX_OK;
+
+header_done:
+
+ ctx->response->pos = p + 1;
+ ctx->state = sw_start;
+
+ return NGX_DONE;
+}
+
+
+static void
+ngx_mail_auth_http_block_read(ngx_event_t *rev)
+{
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_auth_http_ctx_t *ctx;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
+ "mail auth http block read");
+
+ if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
+ c = rev->data;
+ s = c->data;
+
+ ctx = ngx_mail_get_module_ctx(s, ngx_mail_auth_http_module);
+
+ ngx_close_connection(ctx->peer.connection);
+ ngx_destroy_pool(ctx->pool);
+ ngx_mail_session_internal_server_error(s);
+ }
+}
+
+
+static void
+ngx_mail_auth_http_dummy_handler(ngx_event_t *ev)
+{
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, ev->log, 0,
+ "mail auth http dummy handler");
+}
+
+
+static ngx_buf_t *
+ngx_mail_auth_http_create_request(ngx_mail_session_t *s, ngx_pool_t *pool,
+ ngx_mail_auth_http_conf_t *ahcf)
+{
+ size_t len;
+ ngx_buf_t *b;
+ ngx_str_t login, passwd;
+
+ if (ngx_mail_auth_http_escape(pool, &s->login, &login) != NGX_OK) {
+ return NULL;
+ }
+
+ if (ngx_mail_auth_http_escape(pool, &s->passwd, &passwd) != NGX_OK) {
+ return NULL;
+ }
+
+ len = sizeof("GET ") - 1 + ahcf->uri.len + sizeof(" HTTP/1.0" CRLF) - 1
+ + sizeof("Host: ") - 1 + ahcf->host_header.len + sizeof(CRLF) - 1
+ + sizeof("Auth-Method: ") - 1
+ + ngx_mail_auth_http_method[s->auth_method].len
+ + sizeof(CRLF) - 1
+ + sizeof("Auth-User: ") - 1 + login.len + sizeof(CRLF) - 1
+ + sizeof("Auth-Pass: ") - 1 + passwd.len + sizeof(CRLF) - 1
+ + sizeof("Auth-Salt: ") - 1 + s->salt.len
+ + sizeof("Auth-Protocol: imap" CRLF) - 1
+ + sizeof("Auth-Login-Attempt: ") - 1 + NGX_INT_T_LEN
+ + sizeof(CRLF) - 1
+ + sizeof("Client-IP: ") - 1 + s->connection->addr_text.len
+ + sizeof(CRLF) - 1
+ + sizeof(CRLF) - 1;
+
+ b = ngx_create_temp_buf(pool, len);
+ if (b == NULL) {
+ return NULL;
+ }
+
+ b->last = ngx_cpymem(b->last, "GET ", sizeof("GET ") - 1);
+ b->last = ngx_copy(b->last, ahcf->uri.data, ahcf->uri.len);
+ b->last = ngx_cpymem(b->last, " HTTP/1.0" CRLF,
+ sizeof(" HTTP/1.0" CRLF) - 1);
+
+ b->last = ngx_cpymem(b->last, "Host: ", sizeof("Host: ") - 1);
+ b->last = ngx_copy(b->last, ahcf->host_header.data,
+ ahcf->host_header.len);
+ *b->last++ = CR; *b->last++ = LF;
+
+ b->last = ngx_cpymem(b->last, "Auth-Method: ",
+ sizeof("Auth-Method: ") - 1);
+ b->last = ngx_cpymem(b->last,
+ ngx_mail_auth_http_method[s->auth_method].data,
+ ngx_mail_auth_http_method[s->auth_method].len);
+ *b->last++ = CR; *b->last++ = LF;
+
+ b->last = ngx_cpymem(b->last, "Auth-User: ", sizeof("Auth-User: ") - 1);
+ b->last = ngx_copy(b->last, login.data, login.len);
+ *b->last++ = CR; *b->last++ = LF;
+
+ b->last = ngx_cpymem(b->last, "Auth-Pass: ", sizeof("Auth-Pass: ") - 1);
+ b->last = ngx_copy(b->last, passwd.data, passwd.len);
+ *b->last++ = CR; *b->last++ = LF;
+
+ if (s->auth_method != NGX_MAIL_AUTH_PLAIN && s->salt.len) {
+ b->last = ngx_cpymem(b->last, "Auth-Salt: ", sizeof("Auth-Salt: ") - 1);
+ b->last = ngx_copy(b->last, s->salt.data, s->salt.len);
+
+ s->passwd.data = NULL;
+ }
+
+ b->last = ngx_cpymem(b->last, "Auth-Protocol: ",
+ sizeof("Auth-Protocol: ") - 1);
+ b->last = ngx_cpymem(b->last, ngx_mail_auth_http_protocol[s->protocol],
+ sizeof("imap") - 1);
+ *b->last++ = CR; *b->last++ = LF;
+
+ b->last = ngx_sprintf(b->last, "Auth-Login-Attempt: %ui" CRLF,
+ s->login_attempt);
+
+ b->last = ngx_cpymem(b->last, "Client-IP: ", sizeof("Client-IP: ") - 1);
+ b->last = ngx_copy(b->last, s->connection->addr_text.data,
+ s->connection->addr_text.len);
+ *b->last++ = CR; *b->last++ = LF;
+
+ if (ahcf->header.len) {
+ b->last = ngx_copy(b->last, ahcf->header.data, ahcf->header.len);
+ }
+
+ /* add "\r\n" at the header end */
+ *b->last++ = CR; *b->last++ = LF;
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ {
+ ngx_str_t l;
+
+ l.len = b->last - b->pos;
+ l.data = b->pos;
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "mail auth http header:\n\"%V\"", &l);
+ }
+#endif
+
+ return b;
+}
+
+
+static ngx_int_t
+ngx_mail_auth_http_escape(ngx_pool_t *pool, ngx_str_t *text, ngx_str_t *escaped)
+{
+ u_char ch, *p;
+ ngx_uint_t i, n;
+
+ n = 0;
+
+ for (i = 0; i < text->len; i++) {
+ ch = text->data[i];
+
+ if (ch == CR || ch == LF) {
+ n++;
+ }
+ }
+
+ if (n == 0) {
+ *escaped = *text;
+ return NGX_OK;
+ }
+
+ escaped->len = text->len + n * 2;
+
+ p = ngx_palloc(pool, escaped->len);
+ if (p == NULL) {
+ return NGX_ERROR;
+ }
+
+ escaped->data = p;
+
+ for (i = 0; i < text->len; i++) {
+ ch = text->data[i];
+
+ if (ch == CR) {
+ *p++ = '%';
+ *p++ = '0';
+ *p++ = 'D';
+ continue;
+ }
+
+ if (ch == LF) {
+ *p++ = '%';
+ *p++ = '0';
+ *p++ = 'A';
+ continue;
+ }
+
+ *p++ = ch;
+ }
+
+ return NGX_OK;
+}
+
+
+static void *
+ngx_mail_auth_http_create_conf(ngx_conf_t *cf)
+{
+ ngx_mail_auth_http_conf_t *ahcf;
+
+ ahcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_auth_http_conf_t));
+ if (ahcf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ ahcf->timeout = NGX_CONF_UNSET_MSEC;
+
+ return ahcf;
+}
+
+
+static char *
+ngx_mail_auth_http_merge_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+ ngx_mail_auth_http_conf_t *prev = parent;
+ ngx_mail_auth_http_conf_t *conf = child;
+
+ u_char *p;
+ size_t len;
+ ngx_uint_t i;
+ ngx_table_elt_t *header;
+
+ if (conf->peer == NULL) {
+ conf->peer = prev->peer;
+ conf->host_header = prev->host_header;
+ conf->uri = prev->uri;
+ }
+
+ ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000);
+
+ if (conf->headers == NULL) {
+ conf->headers = prev->headers;
+ conf->header = prev->header;
+ }
+
+ if (conf->headers && conf->header.len == 0) {
+ len = 0;
+ header = conf->headers->elts;
+ for (i = 0; i < conf->headers->nelts; i++) {
+ len += header[i].key.len + 2 + header[i].value.len + 2;
+ }
+
+ p = ngx_palloc(cf->pool, len);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->header.len = len;
+ conf->header.data = p;
+
+ for (i = 0; i < conf->headers->nelts; i++) {
+ p = ngx_cpymem(p, header[i].key.data, header[i].key.len);
+ *p++ = ':'; *p++ = ' ';
+ p = ngx_cpymem(p, header[i].value.data, header[i].value.len);
+ *p++ = CR; *p++ = LF;
+ }
+ }
+
+ return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_mail_auth_http(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ ngx_mail_auth_http_conf_t *ahcf = conf;
+
+ ngx_str_t *value;
+ ngx_url_t u;
+
+ value = cf->args->elts;
+
+ ngx_memzero(&u, sizeof(ngx_url_t));
+
+ u.url = value[1];
+ u.default_port = 80;
+ u.uri_part = 1;
+ u.one_addr = 1;
+
+ if (ngx_parse_url(cf, &u) != NGX_OK) {
+ if (u.err) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "%s in auth_http \"%V\"", u.err, &u.url);
+ }
+ }
+
+ ahcf->peer = u.addrs;
+
+ ahcf->host_header = u.host;
+ ahcf->uri = u.uri;
+
+ if (ahcf->uri.len == 0) {
+ ahcf->uri.len = sizeof("/") - 1;
+ ahcf->uri.data = (u_char *) "/";
+ }
+
+ return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_mail_auth_http_header(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ ngx_mail_auth_http_conf_t *ahcf = conf;
+
+ ngx_str_t *value;
+ ngx_table_elt_t *header;
+
+ if (ahcf->headers == NULL) {
+ ahcf->headers = ngx_array_create(cf->pool, 1, sizeof(ngx_table_elt_t));
+ if (ahcf->headers == NULL) {
+ return NGX_CONF_ERROR;
+ }
+ }
+
+ header = ngx_array_push(ahcf->headers);
+ if (header == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ value = cf->args->elts;
+
+ header->key = value[1];
+ header->value = value[2];
+
+ return NGX_CONF_OK;
+}
diff --git a/src/mail/ngx_mail_core_module.c b/src/mail/ngx_mail_core_module.c
new file mode 100644
index 000000000..43dcde454
--- /dev/null
+++ b/src/mail/ngx_mail_core_module.c
@@ -0,0 +1,772 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_mail.h>
+
+
+static void *ngx_mail_core_create_main_conf(ngx_conf_t *cf);
+static void *ngx_mail_core_create_srv_conf(ngx_conf_t *cf);
+static char *ngx_mail_core_merge_srv_conf(ngx_conf_t *cf, void *parent,
+ void *child);
+static char *ngx_mail_core_server(ngx_conf_t *cf, ngx_command_t *cmd,
+ void *conf);
+static char *ngx_mail_core_listen(ngx_conf_t *cf, ngx_command_t *cmd,
+ void *conf);
+static char *ngx_mail_core_capability(ngx_conf_t *cf, ngx_command_t *cmd,
+ void *conf);
+
+
+static ngx_conf_enum_t ngx_mail_core_procotol[] = {
+ { ngx_string("pop3"), NGX_MAIL_POP3_PROTOCOL },
+ { ngx_string("imap"), NGX_MAIL_IMAP_PROTOCOL },
+ { ngx_string("smtp"), NGX_MAIL_SMTP_PROTOCOL },
+ { ngx_null_string, 0 }
+};
+
+
+static ngx_str_t ngx_pop3_default_capabilities[] = {
+ ngx_string("TOP"),
+ ngx_string("USER"),
+ ngx_string("UIDL"),
+ ngx_null_string
+};
+
+
+static ngx_str_t ngx_imap_default_capabilities[] = {
+ ngx_string("IMAP4"),
+ ngx_string("IMAP4rev1"),
+ ngx_string("UIDPLUS"),
+ ngx_null_string
+};
+
+
+static ngx_conf_bitmask_t ngx_pop3_auth_methods[] = {
+ { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED },
+ { ngx_string("apop"), NGX_MAIL_AUTH_APOP_ENABLED },
+ { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED },
+ { ngx_null_string, 0 }
+};
+
+
+static ngx_conf_bitmask_t ngx_smtp_auth_methods[] = {
+ { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED },
+ { ngx_string("login"), NGX_MAIL_AUTH_LOGIN_ENABLED },
+ { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED },
+ { ngx_null_string, 0 }
+};
+
+
+static ngx_str_t ngx_smtp_auth_methods_names[] = {
+ ngx_string("PLAIN"),
+ ngx_string("LOGIN"),
+ ngx_null_string, /* APOP */
+ ngx_string("CRAM-MD5")
+};
+
+
+static ngx_str_t ngx_pop3_auth_plain_capability =
+ ngx_string("+OK methods supported:" CRLF
+ "LOGIN" CRLF
+ "PLAIN" CRLF
+ "." CRLF);
+
+
+static ngx_str_t ngx_pop3_auth_cram_md5_capability =
+ ngx_string("+OK methods supported:" CRLF
+ "LOGIN" CRLF
+ "PLAIN" CRLF
+ "CRAM-MD5" CRLF
+ "." CRLF);
+
+
+
+static ngx_command_t ngx_mail_core_commands[] = {
+
+ { ngx_string("server"),
+ NGX_MAIL_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
+ ngx_mail_core_server,
+ 0,
+ 0,
+ NULL },
+
+ { ngx_string("listen"),
+ NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12,
+ ngx_mail_core_listen,
+ 0,
+ 0,
+ NULL },
+
+ { ngx_string("protocol"),
+ NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_enum_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, protocol),
+ &ngx_mail_core_procotol },
+
+ { ngx_string("imap_client_buffer"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_size_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, imap_client_buffer_size),
+ NULL },
+
+ { ngx_string("so_keepalive"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
+ ngx_conf_set_flag_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, so_keepalive),
+ NULL },
+
+ { ngx_string("timeout"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_msec_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, timeout),
+ NULL },
+
+ { ngx_string("pop3_capabilities"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+ ngx_mail_core_capability,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, pop3_capabilities),
+ NULL },
+
+ { ngx_string("imap_capabilities"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+ ngx_mail_core_capability,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, imap_capabilities),
+ NULL },
+
+ { ngx_string("smtp_capabilities"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+ ngx_mail_core_capability,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, smtp_capabilities),
+ NULL },
+
+ { ngx_string("server_name"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_str_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, server_name),
+ NULL },
+
+ { ngx_string("auth"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+ ngx_conf_set_bitmask_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, pop3_auth_methods),
+ &ngx_pop3_auth_methods },
+
+ { ngx_string("pop3_auth"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+ ngx_conf_set_bitmask_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, pop3_auth_methods),
+ &ngx_pop3_auth_methods },
+
+ { ngx_string("smtp_auth"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+ ngx_conf_set_bitmask_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_core_srv_conf_t, smtp_auth_methods),
+ &ngx_smtp_auth_methods },
+
+ ngx_null_command
+};
+
+
+static ngx_mail_module_t ngx_mail_core_module_ctx = {
+ ngx_mail_core_create_main_conf, /* create main configuration */
+ NULL, /* init main configuration */
+
+ ngx_mail_core_create_srv_conf, /* create server configuration */
+ ngx_mail_core_merge_srv_conf /* merge server configuration */
+};
+
+
+ngx_module_t ngx_mail_core_module = {
+ NGX_MODULE_V1,
+ &ngx_mail_core_module_ctx, /* module context */
+ ngx_mail_core_commands, /* module directives */
+ NGX_MAIL_MODULE, /* module type */
+ NULL, /* init master */
+ NULL, /* init module */
+ NULL, /* init process */
+ NULL, /* init thread */
+ NULL, /* exit thread */
+ NULL, /* exit process */
+ NULL, /* exit master */
+ NGX_MODULE_V1_PADDING
+};
+
+
+static void *
+ngx_mail_core_create_main_conf(ngx_conf_t *cf)
+{
+ ngx_mail_core_main_conf_t *cmcf;
+
+ cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_core_main_conf_t));
+ if (cmcf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ if (ngx_array_init(&cmcf->servers, cf->pool, 4,
+ sizeof(ngx_mail_core_srv_conf_t *))
+ != NGX_OK)
+ {
+ return NGX_CONF_ERROR;
+ }
+
+ if (ngx_array_init(&cmcf->listen, cf->pool, 4, sizeof(ngx_mail_listen_t))
+ != NGX_OK)
+ {
+ return NGX_CONF_ERROR;
+ }
+
+ return cmcf;
+}
+
+
+static void *
+ngx_mail_core_create_srv_conf(ngx_conf_t *cf)
+{
+ ngx_mail_core_srv_conf_t *cscf;
+
+ cscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_core_srv_conf_t));
+ if (cscf == NULL) {
+ return NULL;
+ }
+
+ cscf->imap_client_buffer_size = NGX_CONF_UNSET_SIZE;
+ cscf->protocol = NGX_CONF_UNSET_UINT;
+ cscf->timeout = NGX_CONF_UNSET_MSEC;
+ cscf->so_keepalive = NGX_CONF_UNSET;
+
+ if (ngx_array_init(&cscf->pop3_capabilities, cf->pool, 4, sizeof(ngx_str_t))
+ != NGX_OK)
+ {
+ return NULL;
+ }
+
+ if (ngx_array_init(&cscf->imap_capabilities, cf->pool, 4, sizeof(ngx_str_t))
+ != NGX_OK)
+ {
+ return NULL;
+ }
+
+ if (ngx_array_init(&cscf->smtp_capabilities, cf->pool, 4, sizeof(ngx_str_t))
+ != NGX_OK)
+ {
+ return NULL;
+ }
+
+ return cscf;
+}
+
+
+static char *
+ngx_mail_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+ ngx_mail_core_srv_conf_t *prev = parent;
+ ngx_mail_core_srv_conf_t *conf = child;
+
+ u_char *p;
+ size_t size, stls_only_size;
+ ngx_str_t *c, *d;
+ ngx_uint_t i, m;
+
+ ngx_conf_merge_size_value(conf->imap_client_buffer_size,
+ prev->imap_client_buffer_size,
+ (size_t) ngx_pagesize);
+ ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000);
+ ngx_conf_merge_uint_value(conf->protocol, prev->protocol,
+ NGX_MAIL_IMAP_PROTOCOL);
+ ngx_conf_merge_value(conf->so_keepalive, prev->so_keepalive, 0);
+
+
+ ngx_conf_merge_bitmask_value(conf->pop3_auth_methods,
+ prev->pop3_auth_methods,
+ (NGX_CONF_BITMASK_SET
+ |NGX_MAIL_AUTH_PLAIN_ENABLED));
+
+ ngx_conf_merge_bitmask_value(conf->smtp_auth_methods,
+ prev->smtp_auth_methods,
+ (NGX_CONF_BITMASK_SET
+ |NGX_MAIL_AUTH_PLAIN_ENABLED
+ |NGX_MAIL_AUTH_LOGIN_ENABLED));
+
+
+ ngx_conf_merge_str_value(conf->server_name, prev->server_name, "");
+
+ if (conf->server_name.len == 0) {
+ conf->server_name.data = ngx_palloc(cf->pool, NGX_MAXHOSTNAMELEN);
+ if (conf->server_name.data == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ if (gethostname((char *) conf->server_name.data, NGX_MAXHOSTNAMELEN)
+ == -1)
+ {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno,
+ "gethostname() failed");
+ return NGX_CONF_ERROR;
+ }
+
+ conf->server_name.len = ngx_strlen(conf->server_name.data);
+ }
+
+
+ if (conf->pop3_capabilities.nelts == 0) {
+ conf->pop3_capabilities = prev->pop3_capabilities;
+ }
+
+ if (conf->pop3_capabilities.nelts == 0) {
+
+ for (d = ngx_pop3_default_capabilities; d->len; d++) {
+ c = ngx_array_push(&conf->pop3_capabilities);
+ if (c == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ *c = *d;
+ }
+ }
+
+ size = sizeof("+OK Capability list follows" CRLF) - 1
+ + sizeof("." CRLF) - 1;
+
+ stls_only_size = size + sizeof("STLS" CRLF) - 1;
+
+ c = conf->pop3_capabilities.elts;
+ for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
+ size += c[i].len + sizeof(CRLF) - 1;
+
+ if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) {
+ continue;
+ }
+
+ stls_only_size += c[i].len + sizeof(CRLF) - 1;
+ }
+
+ if (conf->pop3_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) {
+ size += sizeof("SASL LOGIN PLAIN CRAM-MD5" CRLF) - 1;
+
+ } else {
+ size += sizeof("SASL LOGIN PLAIN" CRLF) - 1;
+ }
+
+ p = ngx_palloc(cf->pool, size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->pop3_capability.len = size;
+ conf->pop3_capability.data = p;
+
+ p = ngx_cpymem(p, "+OK Capability list follows" CRLF,
+ sizeof("+OK Capability list follows" CRLF) - 1);
+
+ for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
+ p = ngx_cpymem(p, c[i].data, c[i].len);
+ *p++ = CR; *p++ = LF;
+ }
+
+ if (conf->pop3_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) {
+ p = ngx_cpymem(p, "SASL LOGIN PLAIN CRAM-MD5" CRLF,
+ sizeof("SASL LOGIN PLAIN CRAM-MD5" CRLF) - 1);
+
+ } else {
+ p = ngx_cpymem(p, "SASL LOGIN PLAIN" CRLF,
+ sizeof("SASL LOGIN PLAIN" CRLF) - 1);
+ }
+
+ *p++ = '.'; *p++ = CR; *p = LF;
+
+
+ size += sizeof("STLS" CRLF) - 1;
+
+ p = ngx_palloc(cf->pool, size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->pop3_starttls_capability.len = size;
+ conf->pop3_starttls_capability.data = p;
+
+ p = ngx_cpymem(p, conf->pop3_capability.data,
+ conf->pop3_capability.len - (sizeof("." CRLF) - 1));
+
+ p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1);
+ *p++ = '.'; *p++ = CR; *p = LF;
+
+
+ if (conf->pop3_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) {
+ conf->pop3_auth_capability = ngx_pop3_auth_cram_md5_capability;
+
+ } else {
+ conf->pop3_auth_capability = ngx_pop3_auth_plain_capability;
+ }
+
+
+ p = ngx_palloc(cf->pool, stls_only_size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->pop3_starttls_only_capability.len = stls_only_size;
+ conf->pop3_starttls_only_capability.data = p;
+
+ p = ngx_cpymem(p, "+OK Capability list follows" CRLF,
+ sizeof("+OK Capability list follows" CRLF) - 1);
+
+ for (i = 0; i < conf->pop3_capabilities.nelts; i++) {
+ if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) {
+ continue;
+ }
+
+ p = ngx_cpymem(p, c[i].data, c[i].len);
+ *p++ = CR; *p++ = LF;
+ }
+
+ p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1);
+ *p++ = '.'; *p++ = CR; *p = LF;
+
+
+ if (conf->imap_capabilities.nelts == 0) {
+ conf->imap_capabilities = prev->imap_capabilities;
+ }
+
+ if (conf->imap_capabilities.nelts == 0) {
+
+ for (d = ngx_imap_default_capabilities; d->len; d++) {
+ c = ngx_array_push(&conf->imap_capabilities);
+ if (c == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ *c = *d;
+ }
+ }
+
+ size = sizeof("* CAPABILITY" CRLF) - 1;
+
+ c = conf->imap_capabilities.elts;
+ for (i = 0; i < conf->imap_capabilities.nelts; i++) {
+ size += 1 + c[i].len;
+ }
+
+ p = ngx_palloc(cf->pool, size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->imap_capability.len = size;
+ conf->imap_capability.data = p;
+
+ p = ngx_cpymem(p, "* CAPABILITY", sizeof("* CAPABILITY") - 1);
+
+ for (i = 0; i < conf->imap_capabilities.nelts; i++) {
+ *p++ = ' ';
+ p = ngx_cpymem(p, c[i].data, c[i].len);
+ }
+
+ *p++ = CR; *p = LF;
+
+
+ size += sizeof(" STARTTLS") - 1;
+
+ p = ngx_palloc(cf->pool, size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->imap_starttls_capability.len = size;
+ conf->imap_starttls_capability.data = p;
+
+ p = ngx_cpymem(p, conf->imap_capability.data,
+ conf->imap_capability.len - (sizeof(CRLF) - 1));
+ p = ngx_cpymem(p, " STARTTLS", sizeof(" STARTTLS") - 1);
+ *p++ = CR; *p = LF;
+
+
+ size += sizeof(" LOGINDISABLED") - 1;
+
+ p = ngx_palloc(cf->pool, size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->imap_starttls_only_capability.len = size;
+ conf->imap_starttls_only_capability.data = p;
+
+ p = ngx_cpymem(p, conf->imap_starttls_capability.data,
+ conf->imap_starttls_capability.len - (sizeof(CRLF) - 1));
+ p = ngx_cpymem(p, " LOGINDISABLED", sizeof(" LOGINDISABLED") - 1);
+ *p++ = CR; *p = LF;
+
+
+ size = sizeof("220 ESMTP ready" CRLF) - 1 + conf->server_name.len;
+
+ p = ngx_palloc(cf->pool, size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->smtp_greeting.len = size;
+ conf->smtp_greeting.data = p;
+
+ *p++ = '2'; *p++ = '2'; *p++ = '0'; *p++ = ' ';
+ p = ngx_cpymem(p, conf->server_name.data, conf->server_name.len);
+ ngx_memcpy(p, " ESMTP ready" CRLF, sizeof(" ESMTP ready" CRLF) - 1);
+
+
+ size = sizeof("250 " CRLF) - 1 + conf->server_name.len;
+
+ p = ngx_palloc(cf->pool, size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->smtp_server_name.len = size;
+ conf->smtp_server_name.data = p;
+
+ *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' ';
+ p = ngx_cpymem(p, conf->server_name.data, conf->server_name.len);
+ *p++ = CR; *p = LF;
+
+
+ if (conf->smtp_capabilities.nelts == 0) {
+ conf->smtp_capabilities = prev->smtp_capabilities;
+ }
+
+ size = sizeof("250-") - 1 + conf->server_name.len + sizeof(CRLF) - 1
+ + sizeof("250 AUTH") - 1 + sizeof(CRLF) - 1;
+
+ c = conf->smtp_capabilities.elts;
+ for (i = 0; i < conf->smtp_capabilities.nelts; i++) {
+ size += sizeof("250 ") - 1 + c[i].len + sizeof(CRLF) - 1;
+ }
+
+ for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
+ m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
+ m <<= 1, i++)
+ {
+ if (m & conf->smtp_auth_methods) {
+ size += 1 + ngx_smtp_auth_methods_names[i].len;
+ }
+ }
+
+ p = ngx_palloc(cf->pool, size);
+ if (p == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ conf->smtp_capability.len = size;
+ conf->smtp_capability.data = p;
+
+ *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-';
+ p = ngx_cpymem(p, conf->server_name.data, conf->server_name.len);
+ *p++ = CR; *p++ = LF;
+
+ for (i = 0; i < conf->smtp_capabilities.nelts; i++) {
+ *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-';
+ p = ngx_cpymem(p, c[i].data, c[i].len);
+ *p++ = CR; *p++ = LF;
+ }
+
+ *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' ';
+ *p++ = 'A'; *p++ = 'U'; *p++ = 'T'; *p++ = 'H';
+
+ for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
+ m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
+ m <<= 1, i++)
+ {
+ if (m & conf->smtp_auth_methods) {
+ *p++ = ' ';
+ p = ngx_cpymem(p, ngx_smtp_auth_methods_names[i].data,
+ ngx_smtp_auth_methods_names[i].len);
+ }
+ }
+
+ *p++ = CR; *p = LF;
+
+ return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_mail_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ char *rv;
+ void *mconf;
+ ngx_uint_t m;
+ ngx_conf_t pcf;
+ ngx_mail_module_t *module;
+ ngx_mail_conf_ctx_t *ctx, *mail_ctx;
+ ngx_mail_core_srv_conf_t *cscf, **cscfp;
+ ngx_mail_core_main_conf_t *cmcf;
+
+
+ ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t));
+ if (ctx == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ mail_ctx = cf->ctx;
+ ctx->main_conf = mail_ctx->main_conf;
+
+ /* the server{}'s srv_conf */
+
+ ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module);
+ if (ctx->srv_conf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ for (m = 0; ngx_modules[m]; m++) {
+ if (ngx_modules[m]->type != NGX_MAIL_MODULE) {
+ continue;
+ }
+
+ module = ngx_modules[m]->ctx;
+
+ if (module->create_srv_conf) {
+ mconf = module->create_srv_conf(cf);
+ if (mconf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ ctx->srv_conf[ngx_modules[m]->ctx_index] = mconf;
+ }
+ }
+
+ /* the server configuration context */
+
+ cscf = ctx->srv_conf[ngx_mail_core_module.ctx_index];
+ cscf->ctx = ctx;
+
+ cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index];
+
+ cscfp = ngx_array_push(&cmcf->servers);
+ if (cscfp == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ *cscfp = cscf;
+
+
+ /* parse inside server{} */
+
+ pcf = *cf;
+ cf->ctx = ctx;
+ cf->cmd_type = NGX_MAIL_SRV_CONF;
+
+ rv = ngx_conf_parse(cf, NULL);
+
+ *cf = pcf;
+
+ return rv;
+}
+
+
+/* AF_INET only */
+
+static char *
+ngx_mail_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ ngx_str_t *value;
+ ngx_url_t u;
+ ngx_uint_t i;
+ ngx_mail_listen_t *imls;
+ ngx_mail_core_main_conf_t *cmcf;
+
+ value = cf->args->elts;
+
+ ngx_memzero(&u, sizeof(ngx_url_t));
+
+ u.url = value[1];
+ u.listen = 1;
+
+ if (ngx_parse_url(cf, &u) != NGX_OK) {
+ if (u.err) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "%s in \"%V\" of the \"listen\" directive",
+ u.err, &u.url);
+ }
+
+ return NGX_CONF_ERROR;
+ }
+
+ cmcf = ngx_mail_conf_get_module_main_conf(cf, ngx_mail_core_module);
+
+ imls = cmcf->listen.elts;
+
+ for (i = 0; i < cmcf->listen.nelts; i++) {
+
+ if (imls[i].addr != u.addr.in_addr || imls[i].port != u.port) {
+ continue;
+ }
+
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "duplicate \"%V\" address and port pair", &u.url);
+ return NGX_CONF_ERROR;
+ }
+
+ imls = ngx_array_push(&cmcf->listen);
+ if (imls == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ ngx_memzero(imls, sizeof(ngx_mail_listen_t));
+
+ imls->addr = u.addr.in_addr;
+ imls->port = u.port;
+ imls->family = AF_INET;
+ imls->ctx = cf->ctx;
+
+ if (cf->args->nelts == 2) {
+ return NGX_CONF_OK;
+ }
+
+ if (ngx_strcmp(value[2].data, "bind") == 0) {
+ imls->bind = 1;
+ return NGX_CONF_OK;
+ }
+
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "the invalid \"%V\" parameter", &value[2]);
+ return NGX_CONF_ERROR;
+}
+
+
+static char *
+ngx_mail_core_capability(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ char *p = conf;
+
+ ngx_str_t *c, *value;
+ ngx_uint_t i;
+ ngx_array_t *a;
+
+ a = (ngx_array_t *) (p + cmd->offset);
+
+ value = cf->args->elts;
+
+ for (i = 1; i < cf->args->nelts; i++) {
+ c = ngx_array_push(a);
+ if (c == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ *c = value[i];
+ }
+
+ return NGX_CONF_OK;
+}
diff --git a/src/mail/ngx_mail_handler.c b/src/mail/ngx_mail_handler.c
new file mode 100644
index 000000000..418d1444e
--- /dev/null
+++ b/src/mail/ngx_mail_handler.c
@@ -0,0 +1,1838 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_mail.h>
+
+
+static void ngx_mail_init_session(ngx_connection_t *c);
+static void ngx_mail_init_protocol(ngx_event_t *rev);
+static ngx_int_t ngx_mail_decode_auth_plain(ngx_mail_session_t *s,
+ ngx_str_t *encoded);
+static void ngx_mail_do_auth(ngx_mail_session_t *s);
+static ngx_int_t ngx_mail_read_command(ngx_mail_session_t *s);
+static u_char *ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len);
+
+#if (NGX_MAIL_SSL)
+static void ngx_mail_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c);
+static void ngx_mail_ssl_handshake_handler(ngx_connection_t *c);
+#endif
+
+
+static ngx_str_t greetings[] = {
+ ngx_string("+OK POP3 ready" CRLF),
+ ngx_string("* OK IMAP4 ready" CRLF)
+ /* SMTP greeting */
+};
+
+static ngx_str_t internal_server_errors[] = {
+ ngx_string("-ERR internal server error" CRLF),
+ ngx_string("* BAD internal server error" CRLF),
+ ngx_string("451 4.3.2 Internal server error" CRLF),
+};
+
+static u_char pop3_ok[] = "+OK" CRLF;
+static u_char pop3_next[] = "+ " CRLF;
+static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF;
+static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF;
+static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF;
+
+static u_char imap_star[] = "* ";
+static u_char imap_ok[] = "OK completed" CRLF;
+static u_char imap_next[] = "+ OK" CRLF;
+static u_char imap_bye[] = "* BYE" CRLF;
+static u_char imap_invalid_command[] = "BAD invalid command" CRLF;
+
+static u_char smtp_ok[] = "250 2.0.0 OK" CRLF;
+static u_char smtp_bye[] = "221 2.0.0 Bye" CRLF;
+static u_char smtp_next[] = "334 " CRLF;
+static u_char smtp_username[] = "334 VXNlcm5hbWU6" CRLF;
+static u_char smtp_password[] = "334 UGFzc3dvcmQ6" CRLF;
+static u_char smtp_invalid_command[] = "500 5.5.1 Invalid command" CRLF;
+static u_char smtp_invalid_argument[] = "501 5.5.4 Invalid argument" CRLF;
+static u_char smtp_auth_required[] = "530 5.7.1 Authentication required" CRLF;
+
+
+void
+ngx_mail_init_connection(ngx_connection_t *c)
+{
+ in_addr_t in_addr;
+ socklen_t len;
+ ngx_uint_t i;
+ struct sockaddr_in sin;
+ ngx_mail_log_ctx_t *ctx;
+ ngx_mail_in_port_t *imip;
+ ngx_mail_in_addr_t *imia;
+ ngx_mail_session_t *s;
+#if (NGX_MAIL_SSL)
+ ngx_mail_ssl_conf_t *sslcf;
+#endif
+
+
+ /* find the server configuration for the address:port */
+
+ /* AF_INET only */
+
+ imip = c->listening->servers;
+ imia = imip->addrs;
+
+ i = 0;
+
+ if (imip->naddrs > 1) {
+
+ /*
+ * There are several addresses on this port and one of them
+ * is the "*:port" wildcard so getsockname() is needed to determine
+ * the server address.
+ *
+ * AcceptEx() already gave this address.
+ */
+
+#if (NGX_WIN32)
+ if (c->local_sockaddr) {
+ in_addr =
+ ((struct sockaddr_in *) c->local_sockaddr)->sin_addr.s_addr;
+
+ } else
+#endif
+ {
+ len = sizeof(struct sockaddr_in);
+ if (getsockname(c->fd, (struct sockaddr *) &sin, &len) == -1) {
+ ngx_connection_error(c, ngx_socket_errno,
+ "getsockname() failed");
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ in_addr = sin.sin_addr.s_addr;
+ }
+
+ /* the last address is "*" */
+
+ for ( /* void */ ; i < imip->naddrs - 1; i++) {
+ if (in_addr == imia[i].addr) {
+ break;
+ }
+ }
+ }
+
+
+ s = ngx_pcalloc(c->pool, sizeof(ngx_mail_session_t));
+ if (s == NULL) {
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ s->main_conf = imia[i].ctx->main_conf;
+ s->srv_conf = imia[i].ctx->srv_conf;
+
+ s->addr_text = &imia[i].addr_text;
+
+ c->data = s;
+ s->connection = c;
+
+ ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%ui client %V connected to %V",
+ c->number, &c->addr_text, s->addr_text);
+
+ ctx = ngx_palloc(c->pool, sizeof(ngx_mail_log_ctx_t));
+ if (ctx == NULL) {
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ ctx->client = &c->addr_text;
+ ctx->session = s;
+
+ c->log->connection = c->number;
+ c->log->handler = ngx_mail_log_error;
+ c->log->data = ctx;
+ c->log->action = "sending client greeting line";
+
+ c->log_error = NGX_ERROR_INFO;
+
+#if (NGX_MAIL_SSL)
+
+ sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
+
+ if (sslcf->enable) {
+ ngx_mail_ssl_init_connection(&sslcf->ssl, c);
+ return;
+ }
+
+#endif
+
+ ngx_mail_init_session(c);
+}
+
+
+#if (NGX_MAIL_SSL)
+
+static void
+ngx_mail_starttls_handler(ngx_event_t *rev)
+{
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_ssl_conf_t *sslcf;
+
+ c = rev->data;
+ s = c->data;
+ s->starttls = 1;
+
+ c->log->action = "in starttls state";
+
+ sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
+
+ ngx_mail_ssl_init_connection(&sslcf->ssl, c);
+}
+
+
+static void
+ngx_mail_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c)
+{
+ ngx_mail_session_t *s;
+ ngx_mail_core_srv_conf_t *cscf;
+
+ if (ngx_ssl_create_connection(ssl, c, 0) == NGX_ERROR) {
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ if (ngx_ssl_handshake(c) == NGX_AGAIN) {
+
+ s = c->data;
+
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ ngx_add_timer(c->read, cscf->timeout);
+
+ c->ssl->handler = ngx_mail_ssl_handshake_handler;
+
+ return;
+ }
+
+ ngx_mail_ssl_handshake_handler(c);
+}
+
+
+static void
+ngx_mail_ssl_handshake_handler(ngx_connection_t *c)
+{
+ ngx_mail_session_t *s;
+
+ if (c->ssl->handshaked) {
+
+ s = c->data;
+
+ if (s->starttls) {
+ c->read->handler = ngx_mail_init_protocol;
+ c->write->handler = ngx_mail_send;
+
+ ngx_mail_init_protocol(c->read);
+
+ return;
+ }
+
+ ngx_mail_init_session(c);
+ return;
+ }
+
+ ngx_mail_close_connection(c);
+}
+
+#endif
+
+
+static void
+ngx_mail_init_session(ngx_connection_t *c)
+{
+ u_char *p;
+ ngx_mail_session_t *s;
+ ngx_mail_core_srv_conf_t *cscf;
+
+ c->read->handler = ngx_mail_init_protocol;
+ c->write->handler = ngx_mail_send;
+
+ s = c->data;
+
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ s->protocol = cscf->protocol;
+
+ s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_mail_max_module);
+ if (s->ctx == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (s->protocol == NGX_MAIL_SMTP_PROTOCOL) {
+ s->out = cscf->smtp_greeting;
+
+ } else {
+ s->out = greetings[s->protocol];
+ }
+
+ if ((s->protocol == NGX_MAIL_POP3_PROTOCOL
+ && (cscf->pop3_auth_methods
+ & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED)))
+
+ || (s->protocol == NGX_MAIL_SMTP_PROTOCOL
+ && (cscf->smtp_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)))
+ {
+ s->salt.data = ngx_palloc(c->pool,
+ sizeof(" <18446744073709551616.@>" CRLF) - 1
+ + NGX_TIME_T_LEN
+ + cscf->server_name.len);
+ if (s->salt.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ s->salt.len = ngx_sprintf(s->salt.data, "<%ul.%T@%V>" CRLF,
+ ngx_random(), ngx_time(), &cscf->server_name)
+ - s->salt.data;
+
+ if (s->protocol == NGX_MAIL_POP3_PROTOCOL) {
+ s->out.data = ngx_palloc(c->pool,
+ greetings[0].len + 1 + s->salt.len);
+ if (s->out.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ p = ngx_cpymem(s->out.data,
+ greetings[0].data, greetings[0].len - 2);
+ *p++ = ' ';
+ p = ngx_cpymem(p, s->salt.data, s->salt.len);
+
+ s->out.len = p - s->out.data;
+ }
+ }
+
+ ngx_add_timer(c->read, cscf->timeout);
+
+ if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
+ ngx_mail_close_connection(c);
+ }
+
+ ngx_mail_send(c->write);
+}
+
+
+void
+ngx_mail_send(ngx_event_t *wev)
+{
+ ngx_int_t n;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_core_srv_conf_t *cscf;
+
+ c = wev->data;
+ s = c->data;
+
+ if (wev->timedout) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
+ c->timedout = 1;
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ if (s->out.len == 0) {
+ if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
+ ngx_mail_close_connection(c);
+ }
+
+ return;
+ }
+
+ n = c->send(c, s->out.data, s->out.len);
+
+ if (n > 0) {
+ s->out.len -= n;
+
+ if (wev->timer_set) {
+ ngx_del_timer(wev);
+ }
+
+ if (s->quit) {
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ if (s->blocked) {
+ c->read->handler(c->read);
+ }
+
+ return;
+ }
+
+ if (n == NGX_ERROR) {
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ /* n == NGX_AGAIN */
+
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ ngx_add_timer(c->write, cscf->timeout);
+
+ if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
+ ngx_mail_close_connection(c);
+ return;
+ }
+}
+
+
+static void
+ngx_mail_init_protocol(ngx_event_t *rev)
+{
+ size_t size;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_core_srv_conf_t *cscf;
+
+ c = rev->data;
+
+ c->log->action = "in auth state";
+
+ if (rev->timedout) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
+ c->timedout = 1;
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ s = c->data;
+
+ switch (s->protocol) {
+
+ case NGX_MAIL_POP3_PROTOCOL:
+ size = 128;
+ s->mail_state = ngx_pop3_start;
+ c->read->handler = ngx_pop3_auth_state;
+ break;
+
+ case NGX_MAIL_IMAP_PROTOCOL:
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+ size = cscf->imap_client_buffer_size;
+ s->mail_state = ngx_imap_start;
+ c->read->handler = ngx_imap_auth_state;
+ break;
+
+ default: /* NGX_MAIL_SMTP_PROTOCOL */
+ size = 512;
+ s->mail_state = ngx_smtp_start;
+ c->read->handler = ngx_smtp_auth_state;
+ break;
+ }
+
+ if (s->buffer == NULL) {
+ if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t))
+ == NGX_ERROR)
+ {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ s->buffer = ngx_create_temp_buf(c->pool, size);
+ if (s->buffer == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+ }
+
+ c->read->handler(rev);
+}
+
+
+void
+ngx_pop3_auth_state(ngx_event_t *rev)
+{
+ u_char *p, *last, *text;
+ ssize_t size;
+ ngx_int_t rc;
+ ngx_str_t *arg, salt;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_core_srv_conf_t *cscf;
+#if (NGX_MAIL_SSL)
+ ngx_mail_ssl_conf_t *sslcf;
+#endif
+
+ c = rev->data;
+ s = c->data;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 auth state");
+
+ if (rev->timedout) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
+ c->timedout = 1;
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ if (s->out.len) {
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 send handler busy");
+ s->blocked = 1;
+ return;
+ }
+
+ s->blocked = 0;
+
+ rc = ngx_mail_read_command(s);
+
+ if (rc == NGX_AGAIN || rc == NGX_ERROR) {
+ return;
+ }
+
+ text = pop3_ok;
+ size = sizeof(pop3_ok) - 1;
+
+ if (rc == NGX_OK) {
+ switch (s->mail_state) {
+
+ case ngx_pop3_start:
+
+ switch (s->command) {
+
+ case NGX_POP3_USER:
+
+#if (NGX_MAIL_SSL)
+
+ if (c->ssl == NULL) {
+ sslcf = ngx_mail_get_module_srv_conf(s,
+ ngx_mail_ssl_module);
+
+ if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) {
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+ }
+#endif
+
+ if (s->args.nelts == 1) {
+ s->mail_state = ngx_pop3_user;
+
+ arg = s->args.elts;
+ s->login.len = arg[0].len;
+ s->login.data = ngx_palloc(c->pool, s->login.len);
+ if (s->login.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->login.data, arg[0].data, s->login.len);
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 login: \"%V\"", &s->login);
+
+ break;
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+
+ case NGX_POP3_CAPA:
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+#if (NGX_MAIL_SSL)
+
+ if (c->ssl == NULL) {
+ sslcf = ngx_mail_get_module_srv_conf(s,
+ ngx_mail_ssl_module);
+
+ if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) {
+ size = cscf->pop3_starttls_capability.len;
+ text = cscf->pop3_starttls_capability.data;
+ break;
+ }
+
+ if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) {
+ size = cscf->pop3_starttls_only_capability.len;
+ text = cscf->pop3_starttls_only_capability.data;
+ break;
+ }
+ }
+#endif
+
+ size = cscf->pop3_capability.len;
+ text = cscf->pop3_capability.data;
+ break;
+
+ case NGX_POP3_APOP:
+
+#if (NGX_MAIL_SSL)
+
+ if (c->ssl == NULL) {
+ sslcf = ngx_mail_get_module_srv_conf(s,
+ ngx_mail_ssl_module);
+
+ if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) {
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+ }
+#endif
+
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ if ((cscf->pop3_auth_methods & NGX_MAIL_AUTH_APOP_ENABLED)
+ && s->args.nelts == 2)
+ {
+ arg = s->args.elts;
+
+ s->login.len = arg[0].len;
+ s->login.data = ngx_palloc(c->pool, s->login.len);
+ if (s->login.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->login.data, arg[0].data, s->login.len);
+
+ s->passwd.len = arg[1].len;
+ s->passwd.data = ngx_palloc(c->pool, s->passwd.len);
+ if (s->passwd.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len);
+
+ ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 apop: \"%V\" \"%V\"",
+ &s->login, &s->passwd);
+
+ s->auth_method = NGX_MAIL_AUTH_APOP;
+
+ ngx_mail_do_auth(s);
+ return;
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+
+ case NGX_POP3_AUTH:
+
+#if (NGX_MAIL_SSL)
+
+ if (c->ssl == NULL) {
+ sslcf = ngx_mail_get_module_srv_conf(s,
+ ngx_mail_ssl_module);
+
+ if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) {
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+ }
+#endif
+
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ if (s->args.nelts == 0) {
+ size = cscf->pop3_auth_capability.len;
+ text = cscf->pop3_auth_capability.data;
+ s->state = 0;
+ break;
+ }
+
+ arg = s->args.elts;
+
+ if (arg[0].len == 5) {
+
+ if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5)
+ == 0)
+ {
+
+ if (s->args.nelts != 1) {
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ s->mail_state = ngx_pop3_auth_login_username;
+
+ size = sizeof(pop3_username) - 1;
+ text = pop3_username;
+
+ break;
+
+ } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN",
+ 5)
+ == 0)
+ {
+
+ if (s->args.nelts == 1) {
+ s->mail_state = ngx_pop3_auth_plain;
+
+ size = sizeof(pop3_next) - 1;
+ text = pop3_next;
+
+ break;
+ }
+
+ if (s->args.nelts == 2) {
+
+ /*
+ * workaround for Eudora for Mac: it sends
+ * AUTH PLAIN [base64 encoded]
+ */
+
+ rc = ngx_mail_decode_auth_plain(s, &arg[1]);
+
+ if (rc == NGX_OK) {
+ ngx_mail_do_auth(s);
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */
+
+ break;
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ } else if (arg[0].len == 8
+ && ngx_strncasecmp(arg[0].data,
+ (u_char *) "CRAM-MD5", 8)
+ == 0)
+ {
+ if (s->args.nelts != 1) {
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ s->mail_state = ngx_pop3_auth_cram_md5;
+
+ text = ngx_palloc(c->pool,
+ sizeof("+ " CRLF) - 1
+ + ngx_base64_encoded_length(s->salt.len));
+ if (text == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ text[0] = '+'; text[1]= ' ';
+ salt.data = &text[2];
+ s->salt.len -= 2;
+
+ ngx_encode_base64(&salt, &s->salt);
+
+ s->salt.len += 2;
+ size = 2 + salt.len;
+ text[size++] = CR; text[size++] = LF;
+
+ break;
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+
+ case NGX_POP3_QUIT:
+ s->quit = 1;
+ break;
+
+ case NGX_POP3_NOOP:
+ break;
+
+#if (NGX_MAIL_SSL)
+
+ case NGX_POP3_STLS:
+ if (c->ssl == NULL) {
+ sslcf = ngx_mail_get_module_srv_conf(s,
+ ngx_mail_ssl_module);
+ if (sslcf->starttls) {
+ c->read->handler = ngx_mail_starttls_handler;
+ break;
+ }
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+#endif
+
+ default:
+ s->mail_state = ngx_pop3_start;
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ break;
+
+ case ngx_pop3_user:
+
+ switch (s->command) {
+
+ case NGX_POP3_PASS:
+ if (s->args.nelts == 1) {
+ arg = s->args.elts;
+ s->passwd.len = arg[0].len;
+ s->passwd.data = ngx_palloc(c->pool, s->passwd.len);
+ if (s->passwd.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len);
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 passwd: \"%V\"", &s->passwd);
+#endif
+
+ ngx_mail_do_auth(s);
+ return;
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+
+ case NGX_POP3_CAPA:
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+ size = cscf->pop3_capability.len;
+ text = cscf->pop3_capability.data;
+ break;
+
+ case NGX_POP3_QUIT:
+ s->quit = 1;
+ break;
+
+ case NGX_POP3_NOOP:
+ break;
+
+ default:
+ s->mail_state = ngx_pop3_start;
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ break;
+
+ /* suppress warinings */
+ case ngx_pop3_passwd:
+ break;
+
+ case ngx_pop3_auth_login_username:
+ arg = s->args.elts;
+ s->mail_state = ngx_pop3_auth_login_password;
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 auth login username: \"%V\"", &arg[0]);
+
+ s->login.data = ngx_palloc(c->pool,
+ ngx_base64_decoded_length(arg[0].len));
+ if (s->login.data == NULL){
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) {
+ ngx_log_error(NGX_LOG_INFO, c->log, 0,
+ "client sent invalid base64 encoding "
+ "in AUTH LOGIN command");
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 auth login username: \"%V\"", &s->login);
+
+ size = sizeof(pop3_password) - 1;
+ text = pop3_password;
+
+ break;
+
+ case ngx_pop3_auth_login_password:
+ arg = s->args.elts;
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 auth login password: \"%V\"", &arg[0]);
+#endif
+
+ s->passwd.data = ngx_palloc(c->pool,
+ ngx_base64_decoded_length(arg[0].len));
+ if (s->passwd.data == NULL){
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) {
+ ngx_log_error(NGX_LOG_INFO, c->log, 0,
+ "client sent invalid base64 encoding "
+ "in AUTH LOGIN command");
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 auth login password: \"%V\"", &s->passwd);
+#endif
+
+ ngx_mail_do_auth(s);
+ return;
+
+ case ngx_pop3_auth_plain:
+ arg = s->args.elts;
+
+ rc = ngx_mail_decode_auth_plain(s, &arg[0]);
+
+ if (rc == NGX_OK) {
+ ngx_mail_do_auth(s);
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */
+
+ break;
+
+ case ngx_pop3_auth_cram_md5:
+ arg = s->args.elts;
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 auth cram-md5: \"%V\"", &arg[0]);
+
+ s->login.data = ngx_palloc(c->pool,
+ ngx_base64_decoded_length(arg[0].len));
+ if (s->login.data == NULL){
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) {
+ ngx_log_error(NGX_LOG_INFO, c->log, 0,
+ "client sent invalid base64 encoding "
+ "in AUTH CRAM-MD5 command");
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ p = s->login.data;
+ last = p + s->login.len;
+
+ while (p < last) {
+ if (*p++ == ' ') {
+ s->login.len = p - s->login.data - 1;
+ s->passwd.len = last - p;
+ s->passwd.data = p;
+ break;
+ }
+ }
+
+ if (s->passwd.len != 32) {
+ ngx_log_error(NGX_LOG_INFO, c->log, 0,
+ "client sent invalid CRAM-MD5 hash "
+ "in AUTH CRAM-MD5 command");
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "pop3 auth cram-md5: \"%V\" \"%V\"",
+ &s->login, &s->passwd);
+
+ s->auth_method = NGX_MAIL_AUTH_CRAM_MD5;
+
+ ngx_mail_do_auth(s);
+ return;
+ }
+ }
+
+ if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) {
+ s->mail_state = ngx_pop3_start;
+ s->state = 0;
+ text = pop3_invalid_command;
+ size = sizeof(pop3_invalid_command) - 1;
+ }
+
+ s->args.nelts = 0;
+ s->buffer->pos = s->buffer->start;
+ s->buffer->last = s->buffer->start;
+
+ if (s->state) {
+ s->arg_start = s->buffer->start;
+ }
+
+ s->out.data = text;
+ s->out.len = size;
+
+ ngx_mail_send(c->write);
+}
+
+
+void
+ngx_imap_auth_state(ngx_event_t *rev)
+{
+ u_char *p, *last, *text, *dst, *src, *end;
+ ssize_t text_len, last_len;
+ ngx_str_t *arg;
+ ngx_int_t rc;
+ ngx_uint_t tag, i;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_core_srv_conf_t *cscf;
+#if (NGX_MAIL_SSL)
+ ngx_mail_ssl_conf_t *sslcf;
+#endif
+
+ c = rev->data;
+ s = c->data;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth state");
+
+ if (rev->timedout) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
+ c->timedout = 1;
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ if (s->out.len) {
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap send handler busy");
+ s->blocked = 1;
+ return;
+ }
+
+ s->blocked = 0;
+
+ rc = ngx_mail_read_command(s);
+
+ if (rc == NGX_AGAIN || rc == NGX_ERROR) {
+ return;
+ }
+
+ tag = 1;
+
+ text = NULL;
+ text_len = 0;
+
+ last = imap_ok;
+ last_len = sizeof(imap_ok) - 1;
+
+ if (rc == NGX_OK) {
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i",
+ s->command);
+
+ if (s->backslash) {
+
+ arg = s->args.elts;
+
+ for (i = 0; i < s->args.nelts; i++) {
+ dst = arg[i].data;
+ end = dst + arg[i].len;
+
+ for (src = dst; src < end; dst++) {
+ *dst = *src;
+ if (*src++ == '\\') {
+ *dst = *src++;
+ }
+ }
+
+ arg[i].len = dst - arg[i].data;
+ }
+
+ s->backslash = 0;
+ }
+
+ switch (s->command) {
+
+ case NGX_IMAP_LOGIN:
+
+#if (NGX_MAIL_SSL)
+
+ if (c->ssl == NULL) {
+ sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
+
+ if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) {
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+ }
+#endif
+
+ arg = s->args.elts;
+
+ if (s->args.nelts == 2 && arg[0].len) {
+
+ s->login.len = arg[0].len;
+ s->login.data = ngx_palloc(c->pool, s->login.len);
+ if (s->login.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->login.data, arg[0].data, s->login.len);
+
+ s->passwd.len = arg[1].len;
+ s->passwd.data = ngx_palloc(c->pool, s->passwd.len);
+ if (s->passwd.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len);
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "imap login:\"%V\" passwd:\"%V\"",
+ &s->login, &s->passwd);
+#else
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "imap login:\"%V\"", &s->login);
+#endif
+
+ ngx_mail_do_auth(s);
+ return;
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+
+ case NGX_IMAP_CAPABILITY:
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+#if (NGX_MAIL_SSL)
+
+ if (c->ssl == NULL) {
+ sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
+
+ if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) {
+ text_len = cscf->imap_starttls_capability.len;
+ text = cscf->imap_starttls_capability.data;
+ break;
+ }
+
+ if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) {
+ text_len = cscf->imap_starttls_only_capability.len;
+ text = cscf->imap_starttls_only_capability.data;
+ break;
+ }
+ }
+#endif
+
+ text_len = cscf->imap_capability.len;
+ text = cscf->imap_capability.data;
+ break;
+
+ case NGX_IMAP_LOGOUT:
+ s->quit = 1;
+ text = imap_bye;
+ text_len = sizeof(imap_bye) - 1;
+ break;
+
+ case NGX_IMAP_NOOP:
+ break;
+
+#if (NGX_MAIL_SSL)
+
+ case NGX_IMAP_STARTTLS:
+ if (c->ssl == NULL) {
+ sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
+ if (sslcf->starttls) {
+ c->read->handler = ngx_mail_starttls_handler;
+ break;
+ }
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+#endif
+
+ default:
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ } else if (rc == NGX_IMAP_NEXT) {
+ last = imap_next;
+ last_len = sizeof(imap_next) - 1;
+ tag = 0;
+ }
+
+ if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) {
+ last = imap_invalid_command;
+ last_len = sizeof(imap_invalid_command) - 1;
+ }
+
+ if (tag) {
+ if (s->tag.len == 0) {
+ s->tag.len = sizeof(imap_star) - 1;
+ s->tag.data = (u_char *) imap_star;
+ }
+
+ if (s->tagged_line.len < s->tag.len + text_len + last_len) {
+ s->tagged_line.len = s->tag.len + text_len + last_len;
+ s->tagged_line.data = ngx_palloc(c->pool, s->tagged_line.len);
+ if (s->tagged_line.data == NULL) {
+ ngx_mail_close_connection(c);
+ return;
+ }
+ }
+
+ s->out.data = s->tagged_line.data;
+ s->out.len = s->tag.len + text_len + last_len;
+
+ p = s->out.data;
+
+ if (text) {
+ p = ngx_cpymem(p, text, text_len);
+ }
+ p = ngx_cpymem(p, s->tag.data, s->tag.len);
+ ngx_memcpy(p, last, last_len);
+
+
+ } else {
+ s->out.data = last;
+ s->out.len = last_len;
+ }
+
+ if (rc != NGX_IMAP_NEXT) {
+ s->args.nelts = 0;
+ s->buffer->pos = s->buffer->start;
+ s->buffer->last = s->buffer->start;
+ s->tag.len = 0;
+ }
+
+ ngx_mail_send(c->write);
+}
+
+
+void
+ngx_smtp_auth_state(ngx_event_t *rev)
+{
+ u_char *p, *last, *text, ch;
+ ssize_t size;
+ ngx_int_t rc;
+ ngx_str_t *arg, salt, l;
+ ngx_uint_t i;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_core_srv_conf_t *cscf;
+
+ c = rev->data;
+ s = c->data;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp auth state");
+
+ if (rev->timedout) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
+ c->timedout = 1;
+ ngx_mail_close_connection(c);
+ return;
+ }
+
+ if (s->out.len) {
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp send handler busy");
+ s->blocked = 1;
+ return;
+ }
+
+ s->blocked = 0;
+
+ rc = ngx_mail_read_command(s);
+
+ if (rc == NGX_AGAIN || rc == NGX_ERROR) {
+ return;
+ }
+
+ text = NULL;
+ size = 0;
+
+ if (rc == NGX_OK) {
+ switch (s->mail_state) {
+
+ case ngx_smtp_start:
+
+ switch (s->command) {
+
+ case NGX_SMTP_HELO:
+ case NGX_SMTP_EHLO:
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ if (s->args.nelts != 1) {
+ text = smtp_invalid_argument;
+ size = sizeof(smtp_invalid_argument) - 1;
+ s->state = 0;
+ break;
+ }
+
+ arg = s->args.elts;
+
+ s->smtp_helo.len = arg[0].len;
+
+ s->smtp_helo.data = ngx_palloc(c->pool, arg[0].len);
+ if (s->smtp_helo.data == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ ngx_memcpy(s->smtp_helo.data, arg[0].data, arg[0].len);
+
+ if (s->command == NGX_SMTP_HELO) {
+ size = cscf->smtp_server_name.len;
+ text = cscf->smtp_server_name.data;
+
+ } else {
+ s->esmtp = 1;
+ size = cscf->smtp_capability.len;
+ text = cscf->smtp_capability.data;
+ }
+
+ break;
+
+ case NGX_SMTP_AUTH:
+
+ if (s->args.nelts == 0) {
+ text = smtp_invalid_argument;
+ size = sizeof(smtp_invalid_argument) - 1;
+ s->state = 0;
+ break;
+ }
+
+ arg = s->args.elts;
+
+ if (arg[0].len == 5) {
+
+ if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5)
+ == 0)
+ {
+
+ if (s->args.nelts != 1) {
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ s->mail_state = ngx_smtp_auth_login_username;
+
+ size = sizeof(smtp_username) - 1;
+ text = smtp_username;
+
+ break;
+
+ } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN",
+ 5)
+ == 0)
+ {
+ if (s->args.nelts == 1) {
+ s->mail_state = ngx_smtp_auth_plain;
+
+ size = sizeof(smtp_next) - 1;
+ text = smtp_next;
+
+ break;
+ }
+
+ if (s->args.nelts == 2) {
+
+ rc = ngx_mail_decode_auth_plain(s, &arg[1]);
+
+ if (rc == NGX_OK) {
+ ngx_mail_do_auth(s);
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */
+
+ break;
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ } else if (arg[0].len == 8
+ && ngx_strncasecmp(arg[0].data,
+ (u_char *) "CRAM-MD5", 8)
+ == 0)
+ {
+ if (s->args.nelts != 1) {
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ s->mail_state = ngx_smtp_auth_cram_md5;
+
+ text = ngx_palloc(c->pool,
+ sizeof("334 " CRLF) - 1
+ + ngx_base64_encoded_length(s->salt.len));
+ if (text == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ text[0] = '3'; text[1]= '3'; text[2] = '4'; text[3]= ' ';
+ salt.data = &text[4];
+ s->salt.len -= 2;
+
+ ngx_encode_base64(&salt, &s->salt);
+
+ s->salt.len += 2;
+ size = 4 + salt.len;
+ text[size++] = CR; text[size++] = LF;
+
+ break;
+ }
+
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+
+ case NGX_SMTP_QUIT:
+ s->quit = 1;
+ text = smtp_bye;
+ size = sizeof(smtp_bye) - 1;
+ break;
+
+ case NGX_SMTP_MAIL:
+
+ if (s->connection->log->log_level >= NGX_LOG_INFO) {
+ l.len = s->buffer->last - s->buffer->start;
+ l.data = s->buffer->start;
+
+ for (i = 0; i < l.len; i++) {
+ ch = l.data[i];
+
+ if (ch != CR && ch != LF) {
+ continue;
+ }
+
+ l.data[i] = ' ';
+ }
+
+ while (i) {
+ if (l.data[i - 1] != ' ') {
+ break;
+ }
+
+ i--;
+ }
+
+ l.len = i;
+
+ ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
+ "client was rejected: \"%V\"", &l);
+ }
+
+ text = smtp_auth_required;
+ size = sizeof(smtp_auth_required) - 1;
+ break;
+
+ case NGX_SMTP_NOOP:
+ case NGX_SMTP_RSET:
+ text = smtp_ok;
+ size = sizeof(smtp_ok) - 1;
+ break;
+ }
+
+ break;
+
+ case ngx_smtp_auth_login_username:
+ arg = s->args.elts;
+ s->mail_state = ngx_smtp_auth_login_password;
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "smtp auth login username: \"%V\"", &arg[0]);
+
+ s->login.data = ngx_palloc(c->pool,
+ ngx_base64_decoded_length(arg[0].len));
+ if (s->login.data == NULL){
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) {
+ ngx_log_error(NGX_LOG_INFO, c->log, 0,
+ "client sent invalid base64 encoding "
+ "in AUTH LOGIN command");
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "smtp auth login username: \"%V\"", &s->login);
+
+ size = sizeof(smtp_password) - 1;
+ text = smtp_password;
+
+ break;
+
+ case ngx_smtp_auth_login_password:
+ arg = s->args.elts;
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "smtp auth login password: \"%V\"", &arg[0]);
+#endif
+
+ s->passwd.data = ngx_palloc(c->pool,
+ ngx_base64_decoded_length(arg[0].len));
+ if (s->passwd.data == NULL){
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) {
+ ngx_log_error(NGX_LOG_INFO, c->log, 0,
+ "client sent invalid base64 encoding "
+ "in AUTH LOGIN command");
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "smtp auth login password: \"%V\"", &s->passwd);
+#endif
+
+ ngx_mail_do_auth(s);
+ return;
+
+ case ngx_smtp_auth_plain:
+ arg = s->args.elts;
+
+ rc = ngx_mail_decode_auth_plain(s, &arg[0]);
+
+ if (rc == NGX_OK) {
+ ngx_mail_do_auth(s);
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */
+
+ break;
+
+ case ngx_smtp_auth_cram_md5:
+ arg = s->args.elts;
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "smtp auth cram-md5: \"%V\"", &arg[0]);
+
+ s->login.data = ngx_palloc(c->pool,
+ ngx_base64_decoded_length(arg[0].len));
+ if (s->login.data == NULL){
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) {
+ ngx_log_error(NGX_LOG_INFO, c->log, 0,
+ "client sent invalid base64 encoding "
+ "in AUTH CRAM-MD5 command");
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ p = s->login.data;
+ last = p + s->login.len;
+
+ while (p < last) {
+ if (*p++ == ' ') {
+ s->login.len = p - s->login.data - 1;
+ s->passwd.len = last - p;
+ s->passwd.data = p;
+ break;
+ }
+ }
+
+ if (s->passwd.len != 32) {
+ ngx_log_error(NGX_LOG_INFO, c->log, 0,
+ "client sent invalid CRAM-MD5 hash "
+ "in AUTH CRAM-MD5 command");
+ rc = NGX_MAIL_PARSE_INVALID_COMMAND;
+ break;
+ }
+
+ ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "smtp auth cram-md5: \"%V\" \"%V\"",
+ &s->login, &s->passwd);
+
+ s->auth_method = NGX_MAIL_AUTH_CRAM_MD5;
+
+ ngx_mail_do_auth(s);
+ return;
+ }
+ }
+
+ if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) {
+ s->mail_state = ngx_smtp_start;
+ s->state = 0;
+ text = smtp_invalid_command;
+ size = sizeof(smtp_invalid_command) - 1;
+ }
+
+ s->args.nelts = 0;
+ s->buffer->pos = s->buffer->start;
+ s->buffer->last = s->buffer->start;
+
+ if (s->state) {
+ s->arg_start = s->buffer->start;
+ }
+
+ s->out.data = text;
+ s->out.len = size;
+
+ ngx_mail_send(c->write);
+}
+
+
+static ngx_int_t
+ngx_mail_decode_auth_plain(ngx_mail_session_t *s, ngx_str_t *encoded)
+{
+ u_char *p, *last;
+ ngx_str_t plain;
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "mail auth plain: \"%V\"", encoded);
+#endif
+
+ plain.data = ngx_palloc(s->connection->pool,
+ ngx_base64_decoded_length(encoded->len));
+ if (plain.data == NULL){
+ return NGX_ERROR;
+ }
+
+ if (ngx_decode_base64(&plain, encoded) != NGX_OK) {
+ ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
+ "client sent invalid base64 encoding "
+ "in AUTH PLAIN command");
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+ }
+
+ p = plain.data;
+ last = p + plain.len;
+
+ while (p < last && *p++) { /* void */ }
+
+ if (p == last) {
+ ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
+ "client sent invalid login in AUTH PLAIN command");
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+ }
+
+ s->login.data = p;
+
+ while (p < last && *p) { p++; }
+
+ if (p == last) {
+ ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
+ "client sent invalid password in AUTH PLAIN command");
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+ }
+
+ s->login.len = p++ - s->login.data;
+
+ s->passwd.len = last - p;
+ s->passwd.data = p;
+
+#if (NGX_DEBUG_MAIL_PASSWD)
+ ngx_log_debug2(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "mail auth plain: \"%V\" \"%V\"",
+ &s->login, &s->passwd);
+#endif
+
+ return NGX_OK;
+}
+
+
+static void
+ngx_mail_do_auth(ngx_mail_session_t *s)
+{
+ s->args.nelts = 0;
+ s->buffer->pos = s->buffer->start;
+ s->buffer->last = s->buffer->start;
+ s->state = 0;
+
+ if (s->connection->read->timer_set) {
+ ngx_del_timer(s->connection->read);
+ }
+
+ s->login_attempt++;
+
+ ngx_mail_auth_http_init(s);
+}
+
+
+static ngx_int_t
+ngx_mail_read_command(ngx_mail_session_t *s)
+{
+ ssize_t n;
+ ngx_int_t rc;
+ ngx_str_t l;
+
+ n = s->connection->recv(s->connection, s->buffer->last,
+ s->buffer->end - s->buffer->last);
+
+ if (n == NGX_ERROR || n == 0) {
+ ngx_mail_close_connection(s->connection);
+ return NGX_ERROR;
+ }
+
+ if (n > 0) {
+ s->buffer->last += n;
+ }
+
+ if (n == NGX_AGAIN) {
+ if (ngx_handle_read_event(s->connection->read, 0) == NGX_ERROR) {
+ ngx_mail_session_internal_server_error(s);
+ return NGX_ERROR;
+ }
+
+ return NGX_AGAIN;
+ }
+
+ switch (s->protocol) {
+ case NGX_MAIL_POP3_PROTOCOL:
+ rc = ngx_pop3_parse_command(s);
+ break;
+
+ case NGX_MAIL_IMAP_PROTOCOL:
+ rc = ngx_imap_parse_command(s);
+ break;
+
+ default: /* NGX_MAIL_SMTP_PROTOCOL */
+ rc = ngx_smtp_parse_command(s);
+ break;
+ }
+
+ if (rc == NGX_AGAIN) {
+
+ if (s->buffer->last < s->buffer->end) {
+ return rc;
+ }
+
+ l.len = s->buffer->last - s->buffer->start;
+ l.data = s->buffer->start;
+
+ ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
+ "client sent too long command \"%V\"", &l);
+
+ s->quit = 1;
+
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+ }
+
+ if (rc == NGX_IMAP_NEXT || rc == NGX_MAIL_PARSE_INVALID_COMMAND) {
+ return rc;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_mail_close_connection(s->connection);
+ return NGX_ERROR;
+ }
+
+ return NGX_OK;
+}
+
+
+void
+ngx_mail_session_internal_server_error(ngx_mail_session_t *s)
+{
+ s->out = internal_server_errors[s->protocol];
+ s->quit = 1;
+
+ ngx_mail_send(s->connection->write);
+}
+
+
+void
+ngx_mail_close_connection(ngx_connection_t *c)
+{
+ ngx_pool_t *pool;
+
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+ "close mail connection: %d", c->fd);
+
+#if (NGX_MAIL_SSL)
+
+ if (c->ssl) {
+ if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
+ c->ssl->handler = ngx_mail_close_connection;
+ return;
+ }
+ }
+
+#endif
+
+ c->destroyed = 1;
+
+ pool = c->pool;
+
+ ngx_close_connection(c);
+
+ ngx_destroy_pool(pool);
+}
+
+
+static u_char *
+ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len)
+{
+ u_char *p;
+ ngx_mail_session_t *s;
+ ngx_mail_log_ctx_t *ctx;
+
+ if (log->action) {
+ p = ngx_snprintf(buf, len, " while %s", log->action);
+ len -= p - buf;
+ buf = p;
+ }
+
+ ctx = log->data;
+
+ p = ngx_snprintf(buf, len, ", client: %V", ctx->client);
+ len -= p - buf;
+ buf = p;
+
+ s = ctx->session;
+
+ if (s == NULL) {
+ return p;
+ }
+
+ p = ngx_snprintf(buf, len, ", server: %V", s->addr_text);
+ len -= p - buf;
+ buf = p;
+
+ if (s->login.len == 0) {
+ return p;
+ }
+
+ p = ngx_snprintf(buf, len, ", login: \"%V\"", &s->login);
+ len -= p - buf;
+ buf = p;
+
+ if (s->proxy == NULL) {
+ return p;
+ }
+
+ p = ngx_snprintf(buf, len, ", upstream: %V", s->proxy->upstream.name);
+
+ return p;
+}
diff --git a/src/mail/ngx_mail_parse.c b/src/mail/ngx_mail_parse.c
new file mode 100644
index 000000000..7bab21b57
--- /dev/null
+++ b/src/mail/ngx_mail_parse.c
@@ -0,0 +1,766 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_mail.h>
+
+
+ngx_int_t ngx_pop3_parse_command(ngx_mail_session_t *s)
+{
+ u_char ch, *p, *c, c0, c1, c2, c3;
+ ngx_str_t *arg;
+ enum {
+ sw_start = 0,
+ sw_spaces_before_argument,
+ sw_argument,
+ sw_almost_done
+ } state;
+
+ state = s->state;
+
+ for (p = s->buffer->pos; p < s->buffer->last; p++) {
+ ch = *p;
+
+ switch (state) {
+
+ /* POP3 command */
+ case sw_start:
+ if (ch == ' ' || ch == CR || ch == LF) {
+ c = s->buffer->start;
+
+ if (p - c == 4) {
+
+ c0 = ngx_toupper(c[0]);
+ c1 = ngx_toupper(c[1]);
+ c2 = ngx_toupper(c[2]);
+ c3 = ngx_toupper(c[3]);
+
+ if (c0 == 'U' && c1 == 'S' && c2 == 'E' && c3 == 'R')
+ {
+ s->command = NGX_POP3_USER;
+
+ } else if (c0 == 'P' && c1 == 'A' && c2 == 'S' && c3 == 'S')
+ {
+ s->command = NGX_POP3_PASS;
+
+ } else if (c0 == 'A' && c1 == 'P' && c2 == 'O' && c3 == 'P')
+ {
+ s->command = NGX_POP3_APOP;
+
+ } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T')
+ {
+ s->command = NGX_POP3_QUIT;
+
+ } else if (c0 == 'C' && c1 == 'A' && c2 == 'P' && c3 == 'A')
+ {
+ s->command = NGX_POP3_CAPA;
+
+ } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H')
+ {
+ s->command = NGX_POP3_AUTH;
+
+ } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P')
+ {
+ s->command = NGX_POP3_NOOP;
+#if (NGX_MAIL_SSL)
+ } else if (c0 == 'S' && c1 == 'T' && c2 == 'L' && c3 == 'S')
+ {
+ s->command = NGX_POP3_STLS;
+#endif
+ } else {
+ goto invalid;
+ }
+
+ } else {
+ goto invalid;
+ }
+
+ switch (ch) {
+ case ' ':
+ state = sw_spaces_before_argument;
+ break;
+ case CR:
+ state = sw_almost_done;
+ break;
+ case LF:
+ goto done;
+ }
+ break;
+ }
+
+ if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
+ goto invalid;
+ }
+
+ break;
+
+ case sw_spaces_before_argument:
+ switch (ch) {
+ case ' ':
+ break;
+ case CR:
+ state = sw_almost_done;
+ s->arg_end = p;
+ break;
+ case LF:
+ s->arg_end = p;
+ goto done;
+ default:
+ if (s->args.nelts <= 2) {
+ state = sw_argument;
+ s->arg_start = p;
+ break;
+ }
+ goto invalid;
+ }
+ break;
+
+ case sw_argument:
+ switch (ch) {
+
+ case ' ':
+
+ /*
+ * the space should be considered as part of the at username
+ * or password, but not of argument in other commands
+ */
+
+ if (s->command == NGX_POP3_USER
+ || s->command == NGX_POP3_PASS)
+ {
+ break;
+ }
+
+ /* fall through */
+
+ case CR:
+ case LF:
+ arg = ngx_array_push(&s->args);
+ if (arg == NULL) {
+ return NGX_ERROR;
+ }
+ arg->len = p - s->arg_start;
+ arg->data = s->arg_start;
+ s->arg_start = NULL;
+
+ switch (ch) {
+ case ' ':
+ state = sw_spaces_before_argument;
+ break;
+ case CR:
+ state = sw_almost_done;
+ break;
+ case LF:
+ goto done;
+ }
+ break;
+
+ default:
+ break;
+ }
+ break;
+
+ case sw_almost_done:
+ switch (ch) {
+ case LF:
+ goto done;
+ default:
+ goto invalid;
+ }
+ }
+ }
+
+ s->buffer->pos = p;
+ s->state = state;
+
+ return NGX_AGAIN;
+
+done:
+
+ s->buffer->pos = p + 1;
+
+ if (s->arg_start) {
+ arg = ngx_array_push(&s->args);
+ if (arg == NULL) {
+ return NGX_ERROR;
+ }
+ arg->len = s->arg_end - s->arg_start;
+ arg->data = s->arg_start;
+ s->arg_start = NULL;
+ }
+
+ s->state = (s->command != NGX_POP3_AUTH) ? sw_start : sw_argument;
+
+ return NGX_OK;
+
+invalid:
+
+ s->state = sw_start;
+ s->arg_start = NULL;
+
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+}
+
+
+ngx_int_t ngx_imap_parse_command(ngx_mail_session_t *s)
+{
+ u_char ch, *p, *c;
+ ngx_str_t *arg;
+ enum {
+ sw_start = 0,
+ sw_spaces_before_command,
+ sw_command,
+ sw_spaces_before_argument,
+ sw_argument,
+ sw_backslash,
+ sw_literal,
+ sw_no_sync_literal_argument,
+ sw_start_literal_argument,
+ sw_literal_argument,
+ sw_end_literal_argument,
+ sw_almost_done
+ } state;
+
+ state = s->state;
+
+ for (p = s->buffer->pos; p < s->buffer->last; p++) {
+ ch = *p;
+
+ switch (state) {
+
+ /* IMAP tag */
+ case sw_start:
+ switch (ch) {
+ case ' ':
+ s->tag.len = p - s->buffer->start + 1;
+ s->tag.data = s->buffer->start;
+ state = sw_spaces_before_command;
+ break;
+ case CR:
+ s->state = sw_start;
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+ case LF:
+ s->state = sw_start;
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+ }
+ break;
+
+ case sw_spaces_before_command:
+ switch (ch) {
+ case ' ':
+ break;
+ case CR:
+ s->state = sw_start;
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+ case LF:
+ s->state = sw_start;
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+ default:
+ s->cmd_start = p;
+ state = sw_command;
+ break;
+ }
+ break;
+
+ case sw_command:
+ if (ch == ' ' || ch == CR || ch == LF) {
+
+ c = s->cmd_start;
+
+ switch (p - c) {
+
+ case 4:
+ if ((c[0] == 'N' || c[0] == 'n')
+ && (c[1] == 'O'|| c[1] == 'o')
+ && (c[2] == 'O'|| c[2] == 'o')
+ && (c[3] == 'P'|| c[3] == 'p'))
+ {
+ s->command = NGX_IMAP_NOOP;
+
+ } else {
+ goto invalid;
+ }
+ break;
+
+ case 5:
+ if ((c[0] == 'L'|| c[0] == 'l')
+ && (c[1] == 'O'|| c[1] == 'o')
+ && (c[2] == 'G'|| c[2] == 'g')
+ && (c[3] == 'I'|| c[3] == 'i')
+ && (c[4] == 'N'|| c[4] == 'n'))
+ {
+ s->command = NGX_IMAP_LOGIN;
+
+ } else {
+ goto invalid;
+ }
+ break;
+
+ case 6:
+ if ((c[0] == 'L'|| c[0] == 'l')
+ && (c[1] == 'O'|| c[1] == 'o')
+ && (c[2] == 'G'|| c[2] == 'g')
+ && (c[3] == 'O'|| c[3] == 'o')
+ && (c[4] == 'U'|| c[4] == 'u')
+ && (c[5] == 'T'|| c[5] == 't'))
+ {
+ s->command = NGX_IMAP_LOGOUT;
+
+ } else {
+ goto invalid;
+ }
+ break;
+
+#if (NGX_MAIL_SSL)
+ case 8:
+ if ((c[0] == 'S'|| c[0] == 's')
+ && (c[1] == 'T'|| c[1] == 't')
+ && (c[2] == 'A'|| c[2] == 'a')
+ && (c[3] == 'R'|| c[3] == 'r')
+ && (c[4] == 'T'|| c[4] == 't')
+ && (c[5] == 'T'|| c[5] == 't')
+ && (c[6] == 'L'|| c[6] == 'l')
+ && (c[7] == 'S'|| c[7] == 's'))
+ {
+ s->command = NGX_IMAP_STARTTLS;
+
+ } else {
+ goto invalid;
+ }
+ break;
+#endif
+
+ case 10:
+ if ((c[0] == 'C'|| c[0] == 'c')
+ && (c[1] == 'A'|| c[1] == 'a')
+ && (c[2] == 'P'|| c[2] == 'p')
+ && (c[3] == 'A'|| c[3] == 'a')
+ && (c[4] == 'B'|| c[4] == 'b')
+ && (c[5] == 'I'|| c[5] == 'i')
+ && (c[6] == 'L'|| c[6] == 'l')
+ && (c[7] == 'I'|| c[7] == 'i')
+ && (c[8] == 'T'|| c[8] == 't')
+ && (c[9] == 'Y'|| c[9] == 'y'))
+ {
+ s->command = NGX_IMAP_CAPABILITY;
+
+ } else {
+ goto invalid;
+ }
+ break;
+
+ default:
+ goto invalid;
+ }
+
+ switch (ch) {
+ case ' ':
+ state = sw_spaces_before_argument;
+ break;
+ case CR:
+ state = sw_almost_done;
+ break;
+ case LF:
+ goto done;
+ }
+ break;
+ }
+
+ if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
+ goto invalid;
+ }
+
+ break;
+
+ case sw_spaces_before_argument:
+ switch (ch) {
+ case ' ':
+ break;
+ case CR:
+ state = sw_almost_done;
+ s->arg_end = p;
+ break;
+ case LF:
+ s->arg_end = p;
+ goto done;
+ case '"':
+ if (s->args.nelts <= 2) {
+ s->quoted = 1;
+ s->arg_start = p + 1;
+ state = sw_argument;
+ break;
+ }
+ goto invalid;
+ case '{':
+ if (s->args.nelts <= 2) {
+ state = sw_literal;
+ break;
+ }
+ goto invalid;
+ default:
+ if (s->args.nelts <= 2) {
+ s->arg_start = p;
+ state = sw_argument;
+ break;
+ }
+ goto invalid;
+ }
+ break;
+
+ case sw_argument:
+ switch (ch) {
+ case '"':
+ if (!s->quoted) {
+ break;
+ }
+ s->quoted = 0;
+ /* fall through */
+ case ' ':
+ case CR:
+ case LF:
+ arg = ngx_array_push(&s->args);
+ if (arg == NULL) {
+ return NGX_ERROR;
+ }
+ arg->len = p - s->arg_start;
+ arg->data = s->arg_start;
+ s->arg_start = NULL;
+
+ switch (ch) {
+ case '"':
+ case ' ':
+ state = sw_spaces_before_argument;
+ break;
+ case CR:
+ state = sw_almost_done;
+ break;
+ case LF:
+ goto done;
+ }
+ break;
+ case '\\':
+ if (s->quoted) {
+ s->backslash = 1;
+ state = sw_backslash;
+ }
+ break;
+ }
+ break;
+
+ case sw_backslash:
+ switch (ch) {
+ case CR:
+ case LF:
+ goto invalid;
+ default:
+ state = sw_argument;
+ }
+ break;
+
+ case sw_literal:
+ if (ch >= '0' && ch <= '9') {
+ s->literal_len = s->literal_len * 10 + (ch - '0');
+ break;
+ }
+ if (ch == '}') {
+ state = sw_start_literal_argument;
+ break;
+ }
+ if (ch == '+') {
+ state = sw_no_sync_literal_argument;
+ break;
+ }
+ goto invalid;
+
+ case sw_no_sync_literal_argument:
+ if (ch == '}') {
+ s->no_sync_literal = 1;
+ state = sw_start_literal_argument;
+ break;
+ }
+ goto invalid;
+
+ case sw_start_literal_argument:
+ switch (ch) {
+ case CR:
+ break;
+ case LF:
+ s->buffer->pos = p + 1;
+ s->arg_start = p + 1;
+ if (s->no_sync_literal == 0) {
+ s->state = sw_literal_argument;
+ return NGX_IMAP_NEXT;
+ }
+ state = sw_literal_argument;
+ s->no_sync_literal = 0;
+ break;
+ default:
+ goto invalid;
+ }
+ break;
+
+ case sw_literal_argument:
+ if (s->literal_len && --s->literal_len) {
+ break;
+ }
+
+ arg = ngx_array_push(&s->args);
+ if (arg == NULL) {
+ return NGX_ERROR;
+ }
+ arg->len = p + 1 - s->arg_start;
+ arg->data = s->arg_start;
+ s->arg_start = NULL;
+ state = sw_end_literal_argument;
+
+ break;
+
+ case sw_end_literal_argument:
+ switch (ch) {
+ case '{':
+ if (s->args.nelts <= 2) {
+ state = sw_literal;
+ break;
+ }
+ goto invalid;
+ case CR:
+ state = sw_almost_done;
+ break;
+ case LF:
+ goto done;
+ default:
+ state = sw_spaces_before_argument;
+ break;
+ }
+ break;
+
+ case sw_almost_done:
+ switch (ch) {
+ case LF:
+ goto done;
+ default:
+ goto invalid;
+ }
+ }
+ }
+
+ s->buffer->pos = p;
+ s->state = state;
+
+ return NGX_AGAIN;
+
+done:
+
+ s->buffer->pos = p + 1;
+
+ if (s->arg_start) {
+ arg = ngx_array_push(&s->args);
+ if (arg == NULL) {
+ return NGX_ERROR;
+ }
+ arg->len = s->arg_end - s->arg_start;
+ arg->data = s->arg_start;
+
+ s->arg_start = NULL;
+ s->cmd_start = NULL;
+ s->quoted = 0;
+ s->no_sync_literal = 0;
+ s->literal_len = 0;
+ }
+
+ s->state = sw_start;
+
+ return NGX_OK;
+
+invalid:
+
+ s->state = sw_start;
+ s->quoted = 0;
+ s->no_sync_literal = 0;
+ s->literal_len = 0;
+
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+}
+
+
+ngx_int_t ngx_smtp_parse_command(ngx_mail_session_t *s)
+{
+ u_char ch, *p, *c, c0, c1, c2, c3;
+ ngx_str_t *arg;
+ enum {
+ sw_start = 0,
+ sw_spaces_before_argument,
+ sw_argument,
+ sw_almost_done
+ } state;
+
+ state = s->state;
+
+ for (p = s->buffer->pos; p < s->buffer->last; p++) {
+ ch = *p;
+
+ switch (state) {
+
+ /* SMTP command */
+ case sw_start:
+ if (ch == ' ' || ch == CR || ch == LF) {
+ c = s->buffer->start;
+
+ if (p - c == 4) {
+
+ c0 = ngx_toupper(c[0]);
+ c1 = ngx_toupper(c[1]);
+ c2 = ngx_toupper(c[2]);
+ c3 = ngx_toupper(c[3]);
+
+ if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'O')
+ {
+ s->command = NGX_SMTP_HELO;
+
+ } else if (c0 == 'E' && c1 == 'H' && c2 == 'L' && c3 == 'O')
+ {
+ s->command = NGX_SMTP_EHLO;
+
+ } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T')
+ {
+ s->command = NGX_SMTP_QUIT;
+
+ } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H')
+ {
+ s->command = NGX_SMTP_AUTH;
+
+ } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P')
+ {
+ s->command = NGX_SMTP_NOOP;
+
+ } else if (c0 == 'M' && c1 == 'A' && c2 == 'I' && c3 == 'L')
+ {
+ s->command = NGX_SMTP_MAIL;
+
+ } else if (c0 == 'R' && c1 == 'S' && c2 == 'E' && c3 == 'T')
+ {
+ s->command = NGX_SMTP_RSET;
+
+ } else {
+ goto invalid;
+ }
+
+ } else {
+ goto invalid;
+ }
+
+ switch (ch) {
+ case ' ':
+ state = sw_spaces_before_argument;
+ break;
+ case CR:
+ state = sw_almost_done;
+ break;
+ case LF:
+ goto done;
+ }
+ break;
+ }
+
+ if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
+ goto invalid;
+ }
+
+ break;
+
+ case sw_spaces_before_argument:
+ switch (ch) {
+ case ' ':
+ break;
+ case CR:
+ state = sw_almost_done;
+ s->arg_end = p;
+ break;
+ case LF:
+ s->arg_end = p;
+ goto done;
+ default:
+ if (s->args.nelts <= 2) {
+ state = sw_argument;
+ s->arg_start = p;
+ break;
+ }
+ goto invalid;
+ }
+ break;
+
+ case sw_argument:
+ switch (ch) {
+ case ' ':
+ case CR:
+ case LF:
+ arg = ngx_array_push(&s->args);
+ if (arg == NULL) {
+ return NGX_ERROR;
+ }
+ arg->len = p - s->arg_start;
+ arg->data = s->arg_start;
+ s->arg_start = NULL;
+
+ switch (ch) {
+ case ' ':
+ state = sw_spaces_before_argument;
+ break;
+ case CR:
+ state = sw_almost_done;
+ break;
+ case LF:
+ goto done;
+ }
+ break;
+
+ default:
+ break;
+ }
+ break;
+
+ case sw_almost_done:
+ switch (ch) {
+ case LF:
+ goto done;
+ default:
+ goto invalid;
+ }
+ }
+ }
+
+ s->buffer->pos = p;
+ s->state = state;
+
+ return NGX_AGAIN;
+
+done:
+
+ s->buffer->pos = p + 1;
+
+ if (s->arg_start) {
+ arg = ngx_array_push(&s->args);
+ if (arg == NULL) {
+ return NGX_ERROR;
+ }
+ arg->len = s->arg_end - s->arg_start;
+ arg->data = s->arg_start;
+ s->arg_start = NULL;
+ }
+
+ s->state = (s->command != NGX_SMTP_AUTH) ? sw_start : sw_argument;
+
+ return NGX_OK;
+
+invalid:
+
+ s->state = sw_start;
+ s->arg_start = NULL;
+
+ return NGX_MAIL_PARSE_INVALID_COMMAND;
+}
diff --git a/src/mail/ngx_mail_proxy_module.c b/src/mail/ngx_mail_proxy_module.c
new file mode 100644
index 000000000..03f21eb4c
--- /dev/null
+++ b/src/mail/ngx_mail_proxy_module.c
@@ -0,0 +1,994 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_event_connect.h>
+#include <ngx_mail.h>
+
+
+typedef struct {
+ ngx_flag_t enable;
+ ngx_flag_t pass_error_message;
+ ngx_flag_t xclient;
+ size_t buffer_size;
+ ngx_msec_t timeout;
+} ngx_mail_proxy_conf_t;
+
+
+static void ngx_mail_proxy_block_read(ngx_event_t *rev);
+static void ngx_mail_proxy_pop3_handler(ngx_event_t *rev);
+static void ngx_mail_proxy_imap_handler(ngx_event_t *rev);
+static void ngx_mail_proxy_smtp_handler(ngx_event_t *rev);
+static void ngx_mail_proxy_dummy_handler(ngx_event_t *ev);
+static ngx_int_t ngx_mail_proxy_read_response(ngx_mail_session_t *s,
+ ngx_uint_t state);
+static void ngx_mail_proxy_handler(ngx_event_t *ev);
+static void ngx_mail_proxy_upstream_error(ngx_mail_session_t *s);
+static void ngx_mail_proxy_internal_server_error(ngx_mail_session_t *s);
+static void ngx_mail_proxy_close_session(ngx_mail_session_t *s);
+static void *ngx_mail_proxy_create_conf(ngx_conf_t *cf);
+static char *ngx_mail_proxy_merge_conf(ngx_conf_t *cf, void *parent,
+ void *child);
+
+
+static ngx_command_t ngx_mail_proxy_commands[] = {
+
+ { ngx_string("proxy"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
+ ngx_conf_set_flag_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_proxy_conf_t, enable),
+ NULL },
+
+ { ngx_string("proxy_buffer"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_size_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_proxy_conf_t, buffer_size),
+ NULL },
+
+ { ngx_string("proxy_timeout"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_msec_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_proxy_conf_t, timeout),
+ NULL },
+
+ { ngx_string("proxy_pass_error_message"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_flag_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_proxy_conf_t, pass_error_message),
+ NULL },
+
+ { ngx_string("xclient"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
+ ngx_conf_set_flag_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_proxy_conf_t, xclient),
+ NULL },
+
+ ngx_null_command
+};
+
+
+static ngx_mail_module_t ngx_mail_proxy_module_ctx = {
+ NULL, /* create main configuration */
+ NULL, /* init main configuration */
+
+ ngx_mail_proxy_create_conf, /* create server configuration */
+ ngx_mail_proxy_merge_conf /* merge server configuration */
+};
+
+
+ngx_module_t ngx_mail_proxy_module = {
+ NGX_MODULE_V1,
+ &ngx_mail_proxy_module_ctx, /* module context */
+ ngx_mail_proxy_commands, /* module directives */
+ NGX_MAIL_MODULE, /* module type */
+ NULL, /* init master */
+ NULL, /* init module */
+ NULL, /* init process */
+ NULL, /* init thread */
+ NULL, /* exit thread */
+ NULL, /* exit process */
+ NULL, /* exit master */
+ NGX_MODULE_V1_PADDING
+};
+
+
+static u_char smtp_ok[] = "235 2.0.0 OK" CRLF;
+
+
+void
+ngx_mail_proxy_init(ngx_mail_session_t *s, ngx_peer_addr_t *peer)
+{
+ int keepalive;
+ ngx_int_t rc;
+ ngx_mail_proxy_ctx_t *p;
+ ngx_mail_proxy_conf_t *pcf;
+ ngx_mail_core_srv_conf_t *cscf;
+
+ s->connection->log->action = "connecting to upstream";
+
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ if (cscf->so_keepalive) {
+ keepalive = 1;
+
+ if (setsockopt(s->connection->fd, SOL_SOCKET, SO_KEEPALIVE,
+ (const void *) &keepalive, sizeof(int))
+ == -1)
+ {
+ ngx_log_error(NGX_LOG_ALERT, s->connection->log, ngx_socket_errno,
+ "setsockopt(SO_KEEPALIVE) failed");
+ }
+ }
+
+ p = ngx_pcalloc(s->connection->pool, sizeof(ngx_mail_proxy_ctx_t));
+ if (p == NULL) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ s->proxy = p;
+
+ p->upstream.sockaddr = peer->sockaddr;
+ p->upstream.socklen = peer->socklen;
+ p->upstream.name = &peer->name;
+ p->upstream.get = ngx_event_get_peer;
+ p->upstream.log = s->connection->log;
+ p->upstream.log_error = NGX_ERROR_ERR;
+
+ rc = ngx_event_connect_peer(&p->upstream);
+
+ if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ ngx_add_timer(p->upstream.connection->read, cscf->timeout);
+
+ p->upstream.connection->data = s;
+ p->upstream.connection->pool = s->connection->pool;
+
+ s->connection->read->handler = ngx_mail_proxy_block_read;
+ p->upstream.connection->write->handler = ngx_mail_proxy_dummy_handler;
+
+ pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
+
+ s->proxy->buffer = ngx_create_temp_buf(s->connection->pool,
+ pcf->buffer_size);
+ if (s->proxy->buffer == NULL) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ switch (s->protocol) {
+
+ case NGX_MAIL_POP3_PROTOCOL:
+ p->upstream.connection->read->handler = ngx_mail_proxy_pop3_handler;
+ s->mail_state = ngx_pop3_start;
+ break;
+
+ case NGX_MAIL_IMAP_PROTOCOL:
+ p->upstream.connection->read->handler = ngx_mail_proxy_imap_handler;
+ s->mail_state = ngx_imap_start;
+ break;
+
+ default: /* NGX_MAIL_SMTP_PROTOCOL */
+ p->upstream.connection->read->handler = ngx_mail_proxy_smtp_handler;
+ s->mail_state = ngx_smtp_start;
+ break;
+ }
+}
+
+
+static void
+ngx_mail_proxy_block_read(ngx_event_t *rev)
+{
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy block read");
+
+ if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
+ c = rev->data;
+ s = c->data;
+
+ ngx_mail_proxy_close_session(s);
+ }
+}
+
+
+static void
+ngx_mail_proxy_pop3_handler(ngx_event_t *rev)
+{
+ u_char *p;
+ ngx_int_t rc;
+ ngx_str_t line;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_proxy_conf_t *pcf;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
+ "mail proxy pop3 auth handler");
+
+ c = rev->data;
+ s = c->data;
+
+ if (rev->timedout) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
+ "upstream timed out");
+ c->timedout = 1;
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ rc = ngx_mail_proxy_read_response(s, 0);
+
+ if (rc == NGX_AGAIN) {
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_mail_proxy_upstream_error(s);
+ return;
+ }
+
+ switch (s->mail_state) {
+
+ case ngx_pop3_start:
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user");
+
+ s->connection->log->action = "sending user name to upstream";
+
+ line.len = sizeof("USER ") - 1 + s->login.len + 2;
+ line.data = ngx_palloc(c->pool, line.len);
+ if (line.data == NULL) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ p = ngx_cpymem(line.data, "USER ", sizeof("USER ") - 1);
+ p = ngx_cpymem(p, s->login.data, s->login.len);
+ *p++ = CR; *p = LF;
+
+ s->mail_state = ngx_pop3_user;
+ break;
+
+ case ngx_pop3_user:
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send pass");
+
+ s->connection->log->action = "sending password to upstream";
+
+ line.len = sizeof("PASS ") - 1 + s->passwd.len + 2;
+ line.data = ngx_palloc(c->pool, line.len);
+ if (line.data == NULL) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ p = ngx_cpymem(line.data, "PASS ", sizeof("PASS ") - 1);
+ p = ngx_cpymem(p, s->passwd.data, s->passwd.len);
+ *p++ = CR; *p = LF;
+
+ s->mail_state = ngx_pop3_passwd;
+ break;
+
+ case ngx_pop3_passwd:
+ s->connection->read->handler = ngx_mail_proxy_handler;
+ s->connection->write->handler = ngx_mail_proxy_handler;
+ rev->handler = ngx_mail_proxy_handler;
+ c->write->handler = ngx_mail_proxy_handler;
+
+ pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
+ ngx_add_timer(s->connection->read, pcf->timeout);
+ ngx_del_timer(c->read);
+
+ c->log->action = NULL;
+ ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
+
+ ngx_mail_proxy_handler(s->connection->write);
+
+ return;
+
+ default:
+#if (NGX_SUPPRESS_WARN)
+ line.len = 0;
+ line.data = NULL;
+#endif
+ break;
+ }
+
+ if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
+ /*
+ * we treat the incomplete sending as NGX_ERROR
+ * because it is very strange here
+ */
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ s->proxy->buffer->pos = s->proxy->buffer->start;
+ s->proxy->buffer->last = s->proxy->buffer->start;
+}
+
+
+static void
+ngx_mail_proxy_imap_handler(ngx_event_t *rev)
+{
+ u_char *p;
+ ngx_int_t rc;
+ ngx_str_t line;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_proxy_conf_t *pcf;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
+ "mail proxy imap auth handler");
+
+ c = rev->data;
+ s = c->data;
+
+ if (rev->timedout) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
+ "upstream timed out");
+ c->timedout = 1;
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ rc = ngx_mail_proxy_read_response(s, s->mail_state);
+
+ if (rc == NGX_AGAIN) {
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_mail_proxy_upstream_error(s);
+ return;
+ }
+
+ switch (s->mail_state) {
+
+ case ngx_imap_start:
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
+ "mail proxy send login");
+
+ s->connection->log->action = "sending LOGIN command to upstream";
+
+ line.len = s->tag.len + sizeof("LOGIN ") - 1
+ + 1 + NGX_SIZE_T_LEN + 1 + 2;
+ line.data = ngx_palloc(c->pool, line.len);
+ if (line.data == NULL) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ line.len = ngx_sprintf(line.data, "%VLOGIN {%uz}" CRLF,
+ &s->tag, s->login.len)
+ - line.data;
+
+ s->mail_state = ngx_imap_login;
+ break;
+
+ case ngx_imap_login:
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send user");
+
+ s->connection->log->action = "sending user name to upstream";
+
+ line.len = s->login.len + 1 + 1 + NGX_SIZE_T_LEN + 1 + 2;
+ line.data = ngx_palloc(c->pool, line.len);
+ if (line.data == NULL) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ line.len = ngx_sprintf(line.data, "%V {%uz}" CRLF,
+ &s->login, s->passwd.len)
+ - line.data;
+
+ s->mail_state = ngx_imap_user;
+ break;
+
+ case ngx_imap_user:
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
+ "mail proxy send passwd");
+
+ s->connection->log->action = "sending password to upstream";
+
+ line.len = s->passwd.len + 2;
+ line.data = ngx_palloc(c->pool, line.len);
+ if (line.data == NULL) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ p = ngx_cpymem(line.data, s->passwd.data, s->passwd.len);
+ *p++ = CR; *p = LF;
+
+ s->mail_state = ngx_imap_passwd;
+ break;
+
+ case ngx_imap_passwd:
+ s->connection->read->handler = ngx_mail_proxy_handler;
+ s->connection->write->handler = ngx_mail_proxy_handler;
+ rev->handler = ngx_mail_proxy_handler;
+ c->write->handler = ngx_mail_proxy_handler;
+
+ pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
+ ngx_add_timer(s->connection->read, pcf->timeout);
+ ngx_del_timer(c->read);
+
+ c->log->action = NULL;
+ ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
+
+ ngx_mail_proxy_handler(s->connection->write);
+
+ return;
+
+ default:
+#if (NGX_SUPPRESS_WARN)
+ line.len = 0;
+ line.data = NULL;
+#endif
+ break;
+ }
+
+ if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
+ /*
+ * we treat the incomplete sending as NGX_ERROR
+ * because it is very strange here
+ */
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ s->proxy->buffer->pos = s->proxy->buffer->start;
+ s->proxy->buffer->last = s->proxy->buffer->start;
+}
+
+
+static void
+ngx_mail_proxy_smtp_handler(ngx_event_t *rev)
+{
+ u_char *p;
+ ngx_int_t rc;
+ ngx_str_t line;
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+ ngx_mail_proxy_conf_t *pcf;
+ ngx_mail_core_srv_conf_t *cscf;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
+ "mail proxy smtp auth handler");
+
+ c = rev->data;
+ s = c->data;
+
+ if (rev->timedout) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
+ "upstream timed out");
+ c->timedout = 1;
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ rc = ngx_mail_proxy_read_response(s, s->mail_state);
+
+ if (rc == NGX_AGAIN) {
+ return;
+ }
+
+ if (rc == NGX_ERROR) {
+ ngx_mail_proxy_upstream_error(s);
+ return;
+ }
+
+ switch (s->mail_state) {
+
+ case ngx_smtp_start:
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail proxy send ehlo");
+
+ s->connection->log->action = "sending HELO/EHLO to upstream";
+
+ cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
+
+ line.len = sizeof("HELO ") - 1 + cscf->server_name.len + 2;
+ line.data = ngx_palloc(c->pool, line.len);
+ if (line.data == NULL) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
+
+ p = ngx_cpymem(line.data,
+ ((s->esmtp || pcf->xclient) ? "EHLO " : "HELO "),
+ sizeof("HELO ") - 1);
+
+ p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len);
+ *p++ = CR; *p = LF;
+
+ s->mail_state = pcf->xclient ? ngx_smtp_helo: ngx_smtp_noxclient;
+
+ break;
+
+ case ngx_smtp_helo:
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
+ "mail proxy send xclient");
+
+ s->connection->log->action = "sending XCLIENT to upstream";
+
+ line.len = sizeof("XCLIENT PROTO=SMTP HELO= ADDR= LOGIN= "
+ "NAME=[UNAVAILABLE]" CRLF) - 1
+ + s->esmtp + s->smtp_helo.len
+ + s->connection->addr_text.len + s->login.len;
+
+ line.data = ngx_palloc(c->pool, line.len);
+ if (line.data == NULL) {
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ if (s->smtp_helo.len) {
+ line.len = ngx_sprintf(line.data,
+ "XCLIENT PROTO=%sSMTP HELO=%V ADDR=%V LOGIN=%V "
+ "NAME=[UNAVAILABLE]" CRLF,
+ (s->esmtp ? "E" : ""), &s->smtp_helo,
+ &s->connection->addr_text, &s->login)
+ - line.data;
+ } else {
+ line.len = ngx_sprintf(line.data,
+ "XCLIENT PROTO=SMTP ADDR=%V LOGIN=%V "
+ "NAME=[UNAVAILABLE]" CRLF,
+ &s->connection->addr_text, &s->login)
+ - line.data;
+ }
+
+ s->mail_state = ngx_smtp_xclient;
+ break;
+
+ case ngx_smtp_noxclient:
+ case ngx_smtp_xclient:
+
+ ngx_memcpy(s->proxy->buffer->start, smtp_ok, sizeof(smtp_ok) - 1);
+
+ s->proxy->buffer->pos = s->proxy->buffer->start;
+ s->proxy->buffer->last = s->proxy->buffer->start + sizeof(smtp_ok) - 1;
+
+ s->connection->read->handler = ngx_mail_proxy_handler;
+ s->connection->write->handler = ngx_mail_proxy_handler;
+ rev->handler = ngx_mail_proxy_handler;
+ c->write->handler = ngx_mail_proxy_handler;
+
+ pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
+ ngx_add_timer(s->connection->read, pcf->timeout);
+ ngx_del_timer(c->read);
+
+ c->log->action = NULL;
+ ngx_log_error(NGX_LOG_INFO, c->log, 0, "client logged in");
+
+ ngx_mail_proxy_handler(s->connection->write);
+
+ return;
+
+ default:
+#if (NGX_SUPPRESS_WARN)
+ line.len = 0;
+ line.data = NULL;
+#endif
+ break;
+ }
+
+ if (c->send(c, line.data, line.len) < (ssize_t) line.len) {
+ /*
+ * we treat the incomplete sending as NGX_ERROR
+ * because it is very strange here
+ */
+ ngx_mail_proxy_internal_server_error(s);
+ return;
+ }
+
+ s->proxy->buffer->pos = s->proxy->buffer->start;
+ s->proxy->buffer->last = s->proxy->buffer->start;
+}
+
+
+static void
+ngx_mail_proxy_dummy_handler(ngx_event_t *wev)
+{
+ ngx_connection_t *c;
+ ngx_mail_session_t *s;
+
+ ngx_log_debug0(NGX_LOG_DEBUG_MAIL, wev->log, 0, "mail proxy dummy handler");
+
+ if (ngx_handle_write_event(wev, 0) == NGX_ERROR) {
+ c = wev->data;
+ s = c->data;
+
+ ngx_mail_proxy_close_session(s);
+ }
+}
+
+
+static ngx_int_t
+ngx_mail_proxy_read_response(ngx_mail_session_t *s, ngx_uint_t state)
+{
+ u_char *p;
+ ssize_t n;
+ ngx_buf_t *b;
+ ngx_mail_proxy_conf_t *pcf;
+
+ s->connection->log->action = "reading response from upstream";
+
+ b = s->proxy->buffer;
+
+ n = s->proxy->upstream.connection->recv(s->proxy->upstream.connection,
+ b->last, b->end - b->last);
+
+ if (n == NGX_ERROR || n == 0) {
+ return NGX_ERROR;
+ }
+
+ if (n == NGX_AGAIN) {
+ return NGX_AGAIN;
+ }
+
+ b->last += n;
+
+ if (b->last - b->pos < 5) {
+ return NGX_AGAIN;
+ }
+
+ if (*(b->last - 2) != CR || *(b->last - 1) != LF) {
+ if (b->last == b->end) {
+ *(b->last - 1) = '\0';
+ ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
+ "upstream sent too long response line: \"%s\"",
+ b->pos);
+ return NGX_ERROR;
+ }
+
+ return NGX_AGAIN;
+ }
+
+ p = b->pos;
+
+ switch (s->protocol) {
+
+ case NGX_MAIL_POP3_PROTOCOL:
+ if (p[0] == '+' && p[1] == 'O' && p[2] == 'K') {
+ return NGX_OK;
+ }
+ break;
+
+ case NGX_MAIL_IMAP_PROTOCOL:
+ switch (state) {
+
+ case ngx_imap_start:
+ if (p[0] == '*' && p[1] == ' ' && p[2] == 'O' && p[3] == 'K') {
+ return NGX_OK;
+ }
+ break;
+
+ case ngx_imap_login:
+ case ngx_imap_user:
+ if (p[0] == '+') {
+ return NGX_OK;
+ }
+ break;
+
+ case ngx_imap_passwd:
+ if (ngx_strncmp(p, s->tag.data, s->tag.len) == 0) {
+ p += s->tag.len;
+ if (p[0] == 'O' && p[1] == 'K') {
+ return NGX_OK;
+ }
+ }
+ break;
+ }
+
+ break;
+
+ default: /* NGX_MAIL_SMTP_PROTOCOL */
+ switch (state) {
+
+ case ngx_smtp_helo:
+ case ngx_smtp_noxclient:
+ if (p[0] == '2' && p[1] == '5' && p[2] == '0') {
+ return NGX_OK;
+ }
+ break;
+
+ case ngx_smtp_start:
+ case ngx_smtp_xclient:
+ if (p[0] == '2' && p[1] == '2' && p[2] == '0') {
+ return NGX_OK;
+ }
+ break;
+ }
+
+ break;
+ }
+
+ pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
+
+ if (pcf->pass_error_message == 0) {
+ *(b->last - 2) = '\0';
+ ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
+ "upstream sent invalid response: \"%s\"", p);
+ return NGX_ERROR;
+ }
+
+ s->out.len = b->last - p - 2;
+ s->out.data = p;
+
+ ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
+ "upstream sent invalid response: \"%V\"", &s->out);
+
+ s->out.len = b->last - b->pos;
+ s->out.data = b->pos;
+
+ return NGX_ERROR;
+}
+
+
+static void
+ngx_mail_proxy_handler(ngx_event_t *ev)
+{
+ char *action, *recv_action, *send_action;
+ size_t size;
+ ssize_t n;
+ ngx_buf_t *b;
+ ngx_uint_t do_write;
+ ngx_connection_t *c, *src, *dst;
+ ngx_mail_session_t *s;
+ ngx_mail_proxy_conf_t *pcf;
+
+ c = ev->data;
+ s = c->data;
+
+ if (ev->timedout) {
+ c->log->action = "proxying";
+
+ if (c == s->connection) {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
+ "client timed out");
+ c->timedout = 1;
+
+ } else {
+ ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT,
+ "upstream timed out");
+ }
+
+ ngx_mail_proxy_close_session(s);
+ return;
+ }
+
+ if (c == s->connection) {
+ if (ev->write) {
+ recv_action = "proxying and reading from upstream";
+ send_action = "proxying and sending to client";
+ src = s->proxy->upstream.connection;
+ dst = c;
+ b = s->proxy->buffer;
+
+ } else {
+ recv_action = "proxying and reading from client";
+ send_action = "proxying and sending to upstream";
+ src = c;
+ dst = s->proxy->upstream.connection;
+ b = s->buffer;
+ }
+
+ } else {
+ if (ev->write) {
+ recv_action = "proxying and reading from client";
+ send_action = "proxying and sending to upstream";
+ src = s->connection;
+ dst = c;
+ b = s->buffer;
+
+ } else {
+ recv_action = "proxying and reading from upstream";
+ send_action = "proxying and sending to client";
+ src = c;
+ dst = s->connection;
+ b = s->proxy->buffer;
+ }
+ }
+
+ do_write = ev->write ? 1 : 0;
+
+ ngx_log_debug3(NGX_LOG_DEBUG_MAIL, ev->log, 0,
+ "mail proxy handler: %d, #%d > #%d",
+ do_write, src->fd, dst->fd);
+
+ for ( ;; ) {
+
+ if (do_write) {
+
+ size = b->last - b->pos;
+
+ if (size && dst->write->ready) {
+ c->log->action = send_action;
+
+ n = dst->send(dst, b->pos, size);
+
+ if (n == NGX_ERROR) {
+ ngx_mail_proxy_close_session(s);
+ return;
+ }
+
+ if (n > 0) {
+ b->pos += n;
+
+ if (b->pos == b->last) {
+ b->pos = b->start;
+ b->last = b->start;
+ }
+ }
+ }
+ }
+
+ size = b->end - b->last;
+
+ if (size && src->read->ready) {
+ c->log->action = recv_action;
+
+ n = src->recv(src, b->last, size);
+
+ if (n == NGX_AGAIN || n == 0) {
+ break;
+ }
+
+ if (n > 0) {
+ do_write = 1;
+ b->last += n;
+
+ continue;
+ }
+
+ if (n == NGX_ERROR) {
+ src->read->eof = 1;
+ }
+ }
+
+ break;
+ }
+
+ c->log->action = "proxying";
+
+ if ((s->connection->read->eof || s->proxy->upstream.connection->read->eof)
+ && s->buffer->pos == s->buffer->last
+ && s->proxy->buffer->pos == s->proxy->buffer->last)
+ {
+ action = c->log->action;
+ c->log->action = NULL;
+ ngx_log_error(NGX_LOG_INFO, c->log, 0, "proxied session done");
+ c->log->action = action;
+
+ ngx_mail_proxy_close_session(s);
+ return;
+ }
+
+ if (ngx_handle_write_event(dst->write, 0) == NGX_ERROR) {
+ ngx_mail_proxy_close_session(s);
+ return;
+ }
+
+ if (ngx_handle_read_event(dst->read, 0) == NGX_ERROR) {
+ ngx_mail_proxy_close_session(s);
+ return;
+ }
+
+ if (ngx_handle_write_event(src->write, 0) == NGX_ERROR) {
+ ngx_mail_proxy_close_session(s);
+ return;
+ }
+
+ if (ngx_handle_read_event(src->read, 0) == NGX_ERROR) {
+ ngx_mail_proxy_close_session(s);
+ return;
+ }
+
+ if (c == s->connection) {
+ pcf = ngx_mail_get_module_srv_conf(s, ngx_mail_proxy_module);
+ ngx_add_timer(c->read, pcf->timeout);
+ }
+}
+
+
+static void
+ngx_mail_proxy_upstream_error(ngx_mail_session_t *s)
+{
+ if (s->proxy->upstream.connection) {
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "close mail proxy connection: %d",
+ s->proxy->upstream.connection->fd);
+
+ ngx_close_connection(s->proxy->upstream.connection);
+ }
+
+ if (s->out.len == 0) {
+ ngx_mail_session_internal_server_error(s);
+ return;
+ }
+
+ s->quit = 1;
+ ngx_mail_send(s->connection->write);
+}
+
+
+static void
+ngx_mail_proxy_internal_server_error(ngx_mail_session_t *s)
+{
+ if (s->proxy->upstream.connection) {
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "close mail proxy connection: %d",
+ s->proxy->upstream.connection->fd);
+
+ ngx_close_connection(s->proxy->upstream.connection);
+ }
+
+ ngx_mail_session_internal_server_error(s);
+}
+
+
+static void
+ngx_mail_proxy_close_session(ngx_mail_session_t *s)
+{
+ if (s->proxy->upstream.connection) {
+ ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
+ "close mail proxy connection: %d",
+ s->proxy->upstream.connection->fd);
+
+ ngx_close_connection(s->proxy->upstream.connection);
+ }
+
+ ngx_mail_close_connection(s->connection);
+}
+
+
+static void *
+ngx_mail_proxy_create_conf(ngx_conf_t *cf)
+{
+ ngx_mail_proxy_conf_t *pcf;
+
+ pcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_proxy_conf_t));
+ if (pcf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ pcf->enable = NGX_CONF_UNSET;
+ pcf->pass_error_message = NGX_CONF_UNSET;
+ pcf->xclient = NGX_CONF_UNSET;
+ pcf->buffer_size = NGX_CONF_UNSET_SIZE;
+ pcf->timeout = NGX_CONF_UNSET_MSEC;
+
+ return pcf;
+}
+
+
+static char *
+ngx_mail_proxy_merge_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+ ngx_mail_proxy_conf_t *prev = parent;
+ ngx_mail_proxy_conf_t *conf = child;
+
+ ngx_conf_merge_value(conf->enable, prev->enable, 0);
+ ngx_conf_merge_value(conf->pass_error_message, prev->pass_error_message, 0);
+ ngx_conf_merge_value(conf->xclient, prev->xclient, 1);
+ ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
+ (size_t) ngx_pagesize);
+ ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 24 * 60 * 60000);
+
+ return NGX_CONF_OK;
+}
diff --git a/src/mail/ngx_mail_ssl_module.c b/src/mail/ngx_mail_ssl_module.c
new file mode 100644
index 000000000..e343cbf7d
--- /dev/null
+++ b/src/mail/ngx_mail_ssl_module.c
@@ -0,0 +1,393 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_mail.h>
+
+
+#define NGX_DEFLAUT_CERTIFICATE "cert.pem"
+#define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem"
+#define NGX_DEFLAUT_CIPHERS "ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP"
+
+
+static void *ngx_mail_ssl_create_conf(ngx_conf_t *cf);
+static char *ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child);
+static char *ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
+ void *conf);
+
+#if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
+
+static char *ngx_mail_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd,
+ void *conf);
+
+static char ngx_mail_ssl_openssl097[] = "OpenSSL 0.9.7 and higher";
+
+#endif
+
+
+static ngx_conf_enum_t ngx_http_starttls_state[] = {
+ { ngx_string("off"), NGX_MAIL_STARTTLS_OFF },
+ { ngx_string("on"), NGX_MAIL_STARTTLS_ON },
+ { ngx_string("only"), NGX_MAIL_STARTTLS_ONLY },
+ { ngx_null_string, 0 }
+};
+
+
+
+static ngx_conf_bitmask_t ngx_mail_ssl_protocols[] = {
+ { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
+ { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
+ { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
+ { ngx_null_string, 0 }
+};
+
+
+static ngx_command_t ngx_mail_ssl_commands[] = {
+
+ { ngx_string("ssl"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
+ ngx_conf_set_flag_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_ssl_conf_t, enable),
+ NULL },
+
+ { ngx_string("starttls"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_enum_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_ssl_conf_t, starttls),
+ ngx_http_starttls_state },
+
+ { ngx_string("ssl_certificate"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_str_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_ssl_conf_t, certificate),
+ NULL },
+
+ { ngx_string("ssl_certificate_key"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_str_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_ssl_conf_t, certificate_key),
+ NULL },
+
+ { ngx_string("ssl_protocols"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+ ngx_conf_set_bitmask_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_ssl_conf_t, protocols),
+ &ngx_mail_ssl_protocols },
+
+ { ngx_string("ssl_ciphers"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_str_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_ssl_conf_t, ciphers),
+ NULL },
+
+ { ngx_string("ssl_prefer_server_ciphers"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
+#ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
+ ngx_conf_set_flag_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_ssl_conf_t, prefer_server_ciphers),
+ NULL },
+#else
+ ngx_mail_ssl_nosupported, 0, 0, ngx_mail_ssl_openssl097 },
+#endif
+
+ { ngx_string("ssl_session_cache"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12,
+ ngx_mail_ssl_session_cache,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ 0,
+ NULL },
+
+ { ngx_string("ssl_session_timeout"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_sec_slot,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_ssl_conf_t, session_timeout),
+ NULL },
+
+ ngx_null_command
+};
+
+
+static ngx_mail_module_t ngx_mail_ssl_module_ctx = {
+ NULL, /* create main configuration */
+ NULL, /* init main configuration */
+
+ ngx_mail_ssl_create_conf, /* create server configuration */
+ ngx_mail_ssl_merge_conf /* merge server configuration */
+};
+
+
+ngx_module_t ngx_mail_ssl_module = {
+ NGX_MODULE_V1,
+ &ngx_mail_ssl_module_ctx, /* module context */
+ ngx_mail_ssl_commands, /* module directives */
+ NGX_MAIL_MODULE, /* module type */
+ NULL, /* init master */
+ NULL, /* init module */
+ NULL, /* init process */
+ NULL, /* init thread */
+ NULL, /* exit thread */
+ NULL, /* exit process */
+ NULL, /* exit master */
+ NGX_MODULE_V1_PADDING
+};
+
+
+static ngx_str_t ngx_mail_ssl_sess_id_ctx = ngx_string("MAIL");
+
+
+static void *
+ngx_mail_ssl_create_conf(ngx_conf_t *cf)
+{
+ ngx_mail_ssl_conf_t *scf;
+
+ scf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_ssl_conf_t));
+ if (scf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ /*
+ * set by ngx_pcalloc():
+ *
+ * scf->protocols = 0;
+ * scf->certificate.len = 0;
+ * scf->certificate.data = NULL;
+ * scf->certificate_key.len = 0;
+ * scf->certificate_key.data = NULL;
+ * scf->ciphers.len = 0;
+ * scf->ciphers.data = NULL;
+ * scf->shm_zone = NULL;
+ */
+
+ scf->enable = NGX_CONF_UNSET;
+ scf->starttls = NGX_CONF_UNSET;
+ scf->prefer_server_ciphers = NGX_CONF_UNSET;
+ scf->builtin_session_cache = NGX_CONF_UNSET;
+ scf->session_timeout = NGX_CONF_UNSET;
+
+ return scf;
+}
+
+
+static char *
+ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+ ngx_mail_ssl_conf_t *prev = parent;
+ ngx_mail_ssl_conf_t *conf = child;
+
+ ngx_pool_cleanup_t *cln;
+
+ ngx_conf_merge_value(conf->enable, prev->enable, 0);
+ ngx_conf_merge_value(conf->starttls, prev->starttls, NGX_MAIL_STARTTLS_OFF);
+
+ if (conf->enable == 0 && conf->starttls == NGX_MAIL_STARTTLS_OFF) {
+ return NGX_CONF_OK;
+ }
+
+ ngx_conf_merge_value(conf->session_timeout,
+ prev->session_timeout, 300);
+
+ ngx_conf_merge_value(conf->prefer_server_ciphers,
+ prev->prefer_server_ciphers, 0);
+
+ ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
+ (NGX_CONF_BITMASK_SET
+ |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
+
+ ngx_conf_merge_str_value(conf->certificate, prev->certificate,
+ NGX_DEFLAUT_CERTIFICATE);
+
+ ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
+ NGX_DEFLAUT_CERTIFICATE_KEY);
+
+ ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS);
+
+
+ conf->ssl.log = cf->log;
+
+ if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) {
+ return NGX_CONF_ERROR;
+ }
+
+ cln = ngx_pool_cleanup_add(cf->pool, 0);
+ if (cln == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ cln->handler = ngx_ssl_cleanup_ctx;
+ cln->data = &conf->ssl;
+
+ if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
+ &conf->certificate_key)
+ != NGX_OK)
+ {
+ return NGX_CONF_ERROR;
+ }
+
+ if (conf->ciphers.len) {
+ if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
+ (const char *) conf->ciphers.data)
+ == 0)
+ {
+ ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
+ "SSL_CTX_set_cipher_list(\"%V\") failed",
+ &conf->ciphers);
+ }
+ }
+
+#ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
+
+ if (conf->prefer_server_ciphers) {
+ SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
+ }
+
+#endif
+
+ if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
+ return NGX_CONF_ERROR;
+ }
+
+ ngx_conf_merge_value(conf->builtin_session_cache,
+ prev->builtin_session_cache,
+ NGX_SSL_DFLT_BUILTIN_SCACHE);
+
+ if (conf->shm_zone == NULL) {
+ conf->shm_zone = prev->shm_zone;
+ }
+
+ if (ngx_ssl_session_cache(&conf->ssl, &ngx_mail_ssl_sess_id_ctx,
+ conf->builtin_session_cache,
+ conf->shm_zone, conf->session_timeout)
+ != NGX_OK)
+ {
+ return NGX_CONF_ERROR;
+ }
+
+ return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ ngx_mail_ssl_conf_t *scf = conf;
+
+ size_t len;
+ ngx_str_t *value, name, size;
+ ngx_int_t n;
+ ngx_uint_t i, j;
+
+ value = cf->args->elts;
+
+ for (i = 1; i < cf->args->nelts; i++) {
+
+ if (ngx_strcmp(value[i].data, "builtin") == 0) {
+ scf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE;
+ continue;
+ }
+
+ if (value[i].len > sizeof("builtin:") - 1
+ && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1)
+ == 0)
+ {
+ n = ngx_atoi(value[i].data + sizeof("builtin:") - 1,
+ value[i].len - (sizeof("builtin:") - 1));
+
+ if (n == NGX_ERROR) {
+ goto invalid;
+ }
+
+ scf->builtin_session_cache = n;
+
+ continue;
+ }
+
+ if (value[i].len > sizeof("shared:") - 1
+ && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1)
+ == 0)
+ {
+ len = 0;
+
+ for (j = sizeof("shared:") - 1; j < value[i].len; j++) {
+ if (value[i].data[j] == ':') {
+ break;
+ }
+
+ len++;
+ }
+
+ if (len == 0) {
+ goto invalid;
+ }
+
+ name.len = len;
+ name.data = value[i].data + sizeof("shared:") - 1;
+
+ size.len = value[i].len - j - 1;
+ size.data = name.data + len + 1;
+
+ n = ngx_parse_size(&size);
+
+ if (n == NGX_ERROR) {
+ goto invalid;
+ }
+
+ if (n < (ngx_int_t) (8 * ngx_pagesize)) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "session cache \"%V\" is too small",
+ &value[i]);
+
+ return NGX_CONF_ERROR;
+ }
+
+ scf->shm_zone = ngx_shared_memory_add(cf, &name, n,
+ &ngx_mail_ssl_module);
+ if (scf->shm_zone == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ continue;
+ }
+
+ goto invalid;
+ }
+
+ if (scf->shm_zone && scf->builtin_session_cache == NGX_CONF_UNSET) {
+ scf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE;
+ }
+
+ return NGX_CONF_OK;
+
+invalid:
+
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "invalid session cache \"%V\"", &value[i]);
+
+ return NGX_CONF_ERROR;
+}
+
+
+#if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
+
+static char *
+ngx_mail_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "\"%V\" directive is available only in %s,",
+ &cmd->name, cmd->post);
+
+ return NGX_CONF_ERROR;
+}
+
+#endif
diff --git a/src/mail/ngx_mail_ssl_module.h b/src/mail/ngx_mail_ssl_module.h
new file mode 100644
index 000000000..c69e6186c
--- /dev/null
+++ b/src/mail/ngx_mail_ssl_module.h
@@ -0,0 +1,47 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_MAIL_SSL_H_INCLUDED_
+#define _NGX_MAIL_SSL_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_mail.h>
+
+
+#define NGX_MAIL_STARTTLS_OFF 0
+#define NGX_MAIL_STARTTLS_ON 1
+#define NGX_MAIL_STARTTLS_ONLY 2
+
+
+typedef struct {
+ ngx_flag_t enable;
+
+ ngx_ssl_t ssl;
+
+ ngx_flag_t prefer_server_ciphers;
+ ngx_flag_t starttls;
+
+ ngx_uint_t protocols;
+
+ ssize_t builtin_session_cache;
+
+ time_t session_timeout;
+
+ ngx_str_t certificate;
+ ngx_str_t certificate_key;
+
+ ngx_str_t ciphers;
+
+ ngx_shm_zone_t *shm_zone;
+} ngx_mail_ssl_conf_t;
+
+
+extern ngx_module_t ngx_mail_ssl_module;
+
+
+#endif /* _NGX_MAIL_SSL_H_INCLUDED_ */
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-22 20:11:47 +0000