From 8c7168698ee338f202d23da9805981c57a8b3a33 Mon Sep 17 00:00:00 2001
From: "Dr. Stephen Henson" <steve@openssl.org>
Date: Wed, 9 Sep 2009 12:15:08 +0000
Subject: [PATCH] Seed PRNG with DSA and ECDSA digests for additional
 protection against possible PRNG state duplication.

---
 crypto/dsa/dsa_sign.c   | 2 ++
 crypto/ecdsa/ecs_sign.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/crypto/dsa/dsa_sign.c b/crypto/dsa/dsa_sign.c
index 6ac8e486e8..17555e5892 100644
--- a/crypto/dsa/dsa_sign.c
+++ b/crypto/dsa/dsa_sign.c
@@ -60,6 +60,7 @@
 
 #include "cryptlib.h"
 #include <openssl/dsa.h>
+#include <openssl/rand.h>
 
 DSA_SIG * DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
 	{
@@ -70,6 +71,7 @@ int DSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
 	     unsigned int *siglen, DSA *dsa)
 	{
 	DSA_SIG *s;
+	RAND_seed(dgst, dlen);
 	s=DSA_do_sign(dgst,dlen,dsa);
 	if (s == NULL)
 		{
diff --git a/crypto/ecdsa/ecs_sign.c b/crypto/ecdsa/ecs_sign.c
index 74b1fe8caf..353d5af514 100644
--- a/crypto/ecdsa/ecs_sign.c
+++ b/crypto/ecdsa/ecs_sign.c
@@ -57,6 +57,7 @@
 #ifndef OPENSSL_NO_ENGINE
 #include <openssl/engine.h>
 #endif
+#include <openssl/rand.h>
 
 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
 {
@@ -83,6 +84,7 @@ int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char
 	EC_KEY *eckey)
 {
 	ECDSA_SIG *s;
+	RAND_seed(dgst, dlen);
 	s = ECDSA_do_sign_ex(dgst, dlen, kinv, r, eckey);
 	if (s == NULL)
 	{
-- 
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