1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*-------------------------------------------------------------------------
*
* cryptohash.c
* Fallback implementations for cryptographic hash functions.
*
* This is the set of in-core functions used when there are no other
* alternative options like OpenSSL.
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/common/cryptohash.c
*
*-------------------------------------------------------------------------
*/
#ifndef FRONTEND
#include "postgres.h"
#else
#include "postgres_fe.h"
#endif
#include <sys/param.h>
#include "common/cryptohash.h"
#include "sha2_int.h"
/*
* In backend, use palloc/pfree to ease the error handling. In frontend,
* use malloc to be able to return a failure status back to the caller.
*/
#ifndef FRONTEND
#define ALLOC(size) palloc(size)
#define FREE(ptr) pfree(ptr)
#else
#define ALLOC(size) malloc(size)
#define FREE(ptr) free(ptr)
#endif
/*
* pg_cryptohash_create
*
* Allocate a hash context. Returns NULL on failure for an OOM. The
* backend issues an error, without returning.
*/
pg_cryptohash_ctx *
pg_cryptohash_create(pg_cryptohash_type type)
{
pg_cryptohash_ctx *ctx;
ctx = ALLOC(sizeof(pg_cryptohash_ctx));
if (ctx == NULL)
return NULL;
ctx->type = type;
switch (type)
{
case PG_SHA224:
ctx->data = ALLOC(sizeof(pg_sha224_ctx));
break;
case PG_SHA256:
ctx->data = ALLOC(sizeof(pg_sha256_ctx));
break;
case PG_SHA384:
ctx->data = ALLOC(sizeof(pg_sha384_ctx));
break;
case PG_SHA512:
ctx->data = ALLOC(sizeof(pg_sha512_ctx));
break;
}
if (ctx->data == NULL)
{
explicit_bzero(ctx, sizeof(pg_cryptohash_ctx));
FREE(ctx);
return NULL;
}
return ctx;
}
/*
* pg_cryptohash_init
*
* Initialize a hash context. Note that this implementation is designed
* to never fail, so this always returns 0.
*/
int
pg_cryptohash_init(pg_cryptohash_ctx *ctx)
{
if (ctx == NULL)
return 0;
switch (ctx->type)
{
case PG_SHA224:
pg_sha224_init((pg_sha224_ctx *) ctx->data);
break;
case PG_SHA256:
pg_sha256_init((pg_sha256_ctx *) ctx->data);
break;
case PG_SHA384:
pg_sha384_init((pg_sha384_ctx *) ctx->data);
break;
case PG_SHA512:
pg_sha512_init((pg_sha512_ctx *) ctx->data);
break;
}
return 0;
}
/*
* pg_cryptohash_update
*
* Update a hash context. Note that this implementation is designed
* to never fail, so this always returns 0.
*/
int
pg_cryptohash_update(pg_cryptohash_ctx *ctx, const uint8 *data, size_t len)
{
if (ctx == NULL)
return 0;
switch (ctx->type)
{
case PG_SHA224:
pg_sha224_update((pg_sha224_ctx *) ctx->data, data, len);
break;
case PG_SHA256:
pg_sha256_update((pg_sha256_ctx *) ctx->data, data, len);
break;
case PG_SHA384:
pg_sha384_update((pg_sha384_ctx *) ctx->data, data, len);
break;
case PG_SHA512:
pg_sha512_update((pg_sha512_ctx *) ctx->data, data, len);
break;
}
return 0;
}
/*
* pg_cryptohash_final
*
* Finalize a hash context. Note that this implementation is designed
* to never fail, so this always returns 0.
*/
int
pg_cryptohash_final(pg_cryptohash_ctx *ctx, uint8 *dest)
{
if (ctx == NULL)
return 0;
switch (ctx->type)
{
case PG_SHA224:
pg_sha224_final((pg_sha224_ctx *) ctx->data, dest);
break;
case PG_SHA256:
pg_sha256_final((pg_sha256_ctx *) ctx->data, dest);
break;
case PG_SHA384:
pg_sha384_final((pg_sha384_ctx *) ctx->data, dest);
break;
case PG_SHA512:
pg_sha512_final((pg_sha512_ctx *) ctx->data, dest);
break;
}
return 0;
}
/*
* pg_cryptohash_free
*
* Free a hash context.
*/
void
pg_cryptohash_free(pg_cryptohash_ctx *ctx)
{
if (ctx == NULL)
return;
FREE(ctx->data);
explicit_bzero(ctx, sizeof(pg_cryptohash_ctx));
FREE(ctx);
}
|
