pgcrypto update:

Reserve px_get_random_bytes() for strong randomness,
add new function px_get_pseudo_random_bytes() for
weak randomness and use it in gen_salt().

On openssl case, use RAND_pseudo_bytes() for
px_get_pseudo_random_bytes().

Final result is that is user has not configured random
souce but kept the 'silly' one, gen_salt() keeps
working, but pgp_encrypt() will throw error.

Marko Kreen

diff --git a/contrib/pgcrypto/px-crypt.c b/contrib/pgcrypto/px-crypt.c
index 8b398c38a0c9ebdcdae200516614930aaed10f3d..5b99d1d0468c1c85fc32e220f57920fb5669fa5c 100644 (file)
--- a/contrib/pgcrypto/px-crypt.c
+++ b/contrib/pgcrypto/px-crypt.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/px-crypt.c,v 1.10 2005/03/21 05:19:55 neilc Exp $
+ * $PostgreSQL: pgsql/contrib/pgcrypto/px-crypt.c,v 1.11 2005/03/21 05:22:14 neilc Exp $
  */
 
 #include <postgres.h>
@@ -171,7 +171,7 @@ px_gen_salt(const char *salt_type, char *buf, int rounds)
            return PXE_BAD_SALT_ROUNDS;
    }
 
-   res = px_get_random_bytes(rbuf, g->input_len);
+   res = px_get_pseudo_random_bytes(rbuf, g->input_len);
    if (res < 0)
        return res;
 

diff --git a/contrib/pgcrypto/px.c b/contrib/pgcrypto/px.c
index 259d054bbd2bd35f171a21bcb36bc9043d5e4e89..51f83069179b562657dfdac30c0573bd11bf6fa9 100644 (file)
--- a/contrib/pgcrypto/px.c
+++ b/contrib/pgcrypto/px.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/px.c,v 1.10 2005/03/21 05:19:55 neilc Exp $
+ * $PostgreSQL: pgsql/contrib/pgcrypto/px.c,v 1.11 2005/03/21 05:22:14 neilc Exp $
  */
 
 #include <postgres.h>
@@ -56,6 +56,7 @@ static const struct error_desc px_err_list[] = {
    {PXE_UNKNOWN_SALT_ALGO, "Unknown salt algorithm"},
    {PXE_BAD_SALT_ROUNDS, "Incorrect number of rounds"},
    {PXE_MCRYPT_INTERNAL, "mcrypt internal error"},
+   {PXE_NO_RANDOM, "No strong random source"},
    {0, NULL},
 };
 

diff --git a/contrib/pgcrypto/px.h b/contrib/pgcrypto/px.h
index f205000e8ed07bea7f2066fd78cee235a6387aaa..d7a15ffaa35836da137bcbd1ad7c22088ea41f1c 100644 (file)
--- a/contrib/pgcrypto/px.h
+++ b/contrib/pgcrypto/px.h
@@ -26,7 +26,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $PostgreSQL: pgsql/contrib/pgcrypto/px.h,v 1.11 2005/03/21 05:19:55 neilc Exp $
+ * $PostgreSQL: pgsql/contrib/pgcrypto/px.h,v 1.12 2005/03/21 05:22:14 neilc Exp $
  */
 
 #ifndef __PX_H
@@ -83,6 +83,7 @@ void      px_free(void *p);
 #define PXE_UNKNOWN_SALT_ALGO      -14
 #define PXE_BAD_SALT_ROUNDS            -15
 #define PXE_MCRYPT_INTERNAL            -16
+#define PXE_NO_RANDOM              -17
 
 typedef struct px_digest PX_MD;
 typedef struct px_alias PX_Alias;
@@ -168,6 +169,7 @@ int         px_find_cipher(const char *name, PX_Cipher ** res);
 int            px_find_combo(const char *name, PX_Combo ** res);
 
 int            px_get_random_bytes(uint8 *dst, unsigned count);
+int            px_get_pseudo_random_bytes(uint8 *dst, unsigned count);
 
 const char *px_strerror(int err);
 

diff --git a/contrib/pgcrypto/random.c b/contrib/pgcrypto/random.c
index 840d4df7fc485df7511763eb9a63f4e9e0e99086..7f2f5f49258da2088690442ac3af8e473ee9ebce 100644 (file)
--- a/contrib/pgcrypto/random.c
+++ b/contrib/pgcrypto/random.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/random.c,v 1.9 2005/03/21 05:19:55 neilc Exp $
+ * $PostgreSQL: pgsql/contrib/pgcrypto/random.c,v 1.10 2005/03/21 05:22:14 neilc Exp $
  */
 
 
@@ -78,10 +78,16 @@ px_get_random_bytes(uint8 *dst, unsigned count)
    return res;
 }
 
+int
+px_get_pseudo_random_bytes(uint8 *dst, unsigned count)
+{
+   return px_get_random_bytes(dst, count);
+}
+
 #elif defined(RAND_SILLY)
 
 int
-px_get_random_bytes(uint8 *dst, unsigned count)
+px_get_pseudo_random_bytes(uint8 *dst, unsigned count)
 {
    int         i;
 
@@ -90,6 +96,12 @@ px_get_random_bytes(uint8 *dst, unsigned count)
    return i;
 }
 
+int
+px_get_random_bytes(uint8 *dst, unsigned count)
+{
+   return PXE_NO_RANDOM;
+}
+
 #elif defined(RAND_OPENSSL)
 
 #include <openssl/evp.h>
@@ -99,22 +111,24 @@ px_get_random_bytes(uint8 *dst, unsigned count)
 
 static int openssl_random_init = 0;
 
+/*
+ * OpenSSL random should re-feeded occasionally. From /dev/urandom
+ * preferably.
+ */
+static void init_openssl()
+{
+   if (RAND_get_rand_method() == NULL)
+       RAND_set_rand_method(RAND_SSLeay());
+   openssl_random_init = 1;
+}
+
 int
 px_get_random_bytes(uint8 *dst, unsigned count)
 {
    int         res;
 
    if (!openssl_random_init)
-   {
-       if (RAND_get_rand_method() == NULL)
-           RAND_set_rand_method(RAND_SSLeay());
-       openssl_random_init = 1;
-   }
-
-   /*
-    * OpenSSL random should re-feeded occasionally. From /dev/urandom
-    * preferably.
-    */
+       init_openssl();
 
    res = RAND_bytes(dst, count);
    if (res == 1)
@@ -123,6 +137,21 @@ px_get_random_bytes(uint8 *dst, unsigned count)
    return PXE_OSSL_RAND_ERROR;
 }
 
+int
+px_get_pseudo_random_bytes(uint8 *dst, unsigned count)
+{
+   int         res;
+
+   if (!openssl_random_init)
+       init_openssl();
+
+   res = RAND_pseudo_bytes(dst, count);
+   if (res == 0 || res == 1)
+       return count;
+
+   return PXE_OSSL_RAND_ERROR;
+}
+
 #else
 #error "Invalid random source"
 #endif