From 1abf76e82cbb5c09f5517d155ea404727f67a507 Mon Sep 17 00:00:00 2001
From: Neil Conway <neilc@samurai.com>
Date: Thu, 13 Jul 2006 04:15:25 +0000
Subject: "Annual" pgcrypto update from Marko Kreen:

Few cleanups and couple of new things:

 - add SHA2 algorithm to older OpenSSL
 - add BIGNUM math to have public-key cryptography work on non-OpenSSL
   build.
 - gen_random_bytes() function

The status of SHA2 algoritms and public-key encryption can now be
changed to 'always available.'

That makes pgcrypto functionally complete and unless there will be new
editions of AES, SHA2 or OpenPGP standards, there is no major changes
planned.
---
 contrib/pgcrypto/openssl.c | 40 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 36 insertions(+), 4 deletions(-)

(limited to 'contrib/pgcrypto/openssl.c')

diff --git a/contrib/pgcrypto/openssl.c b/contrib/pgcrypto/openssl.c
index 8fc60eba420..74234e9bf02 100644
--- a/contrib/pgcrypto/openssl.c
+++ b/contrib/pgcrypto/openssl.c
@@ -26,7 +26,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $PostgreSQL: pgsql/contrib/pgcrypto/openssl.c,v 1.27 2006/02/18 20:48:51 neilc Exp $
+ * $PostgreSQL: pgsql/contrib/pgcrypto/openssl.c,v 1.28 2006/07/13 04:15:25 neilc Exp $
  */
 
 #include "postgres.h"
@@ -146,6 +146,38 @@ static int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *res, unsigned int
 
 #endif   /* old OpenSSL */
 
+/*
+ * Provide SHA2 for older OpenSSL < 0.9.8
+ */
+#if OPENSSL_VERSION_NUMBER < 0x00908000L
+
+#include "sha2.c"
+#include "internal-sha2.c"
+
+typedef int (*init_f)(PX_MD *md);
+
+static int compat_find_digest(const char *name, PX_MD **res)
+{
+	init_f init = NULL;
+	if (pg_strcasecmp(name, "sha224") == 0)
+		init = init_sha224;
+	else if (pg_strcasecmp(name, "sha256") == 0)
+		init = init_sha256;
+	else if (pg_strcasecmp(name, "sha384") == 0)
+		init = init_sha384;
+	else if (pg_strcasecmp(name, "sha512") == 0)
+		init = init_sha512;
+	else
+		return PXE_NO_HASH;
+	*res = px_alloc(sizeof(PX_MD));
+	init(*res);
+	return 0;
+}
+
+#else
+#define compat_find_digest(name, res)  (PXE_NO_HASH)
+#endif
+
 /*
  * Hashes
  */
@@ -223,7 +255,7 @@ px_find_digest(const char *name, PX_MD ** res)
 
 	md = EVP_get_digestbyname(name);
 	if (md == NULL)
-		return PXE_NO_HASH;
+		return compat_find_digest(name, res);
 
 	digest = px_alloc(sizeof(*digest));
 	digest->algo = md;
@@ -526,7 +558,7 @@ ossl_des3_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
 	ossldata   *od = c->ptr;
 
 	for (i = 0; i < dlen / bs; i++)
-		DES_ecb3_encrypt(data + i * bs, res + i * bs,
+		DES_ecb3_encrypt((void *)(data + i * bs), (void *)(res + i * bs),
 						 &od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3, 1);
 	return 0;
 }
@@ -540,7 +572,7 @@ ossl_des3_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
 	ossldata   *od = c->ptr;
 
 	for (i = 0; i < dlen / bs; i++)
-		DES_ecb3_encrypt(data + i * bs, res + i * bs,
+		DES_ecb3_encrypt((void *)(data + i * bs), (void *)(res + i * bs),
 						 &od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3, 0);
 	return 0;
 }
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