File openssl-1.0.1i-fipslocking.patch of Package openssl.1633

Index: openssl-1.0.1i/crypto/fips/fips_drbg_rand.c
===================================================================
--- openssl-1.0.1i.orig/crypto/fips/fips_drbg_rand.c	2014-10-15 14:16:52.709471327 +0200
+++ openssl-1.0.1i/crypto/fips/fips_drbg_rand.c	2014-10-15 14:16:52.834472848 +0200
@@ -77,7 +77,8 @@ static int fips_drbg_bytes(unsigned char
 	int rv = 0;
 	unsigned char *adin = NULL;
 	size_t adinlen = 0;
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+	int locked;
+	locked = private_RAND_lock(1);
 	do 
 		{
 		size_t rcnt;
@@ -109,7 +110,8 @@ static int fips_drbg_bytes(unsigned char
 	while (count);
 	rv = 1;
 	err:
-	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+	if (locked)
+		private_RAND_lock(0);
 	return rv;
 	}
 
@@ -124,35 +126,51 @@ static int fips_drbg_status(void)
 	{
 	DRBG_CTX *dctx = &ossl_dctx;
 	int rv;
-	CRYPTO_r_lock(CRYPTO_LOCK_RAND);
+	int locked;
+	locked = private_RAND_lock(1);
 	rv = dctx->status == DRBG_STATUS_READY ? 1 : 0;
-	CRYPTO_r_unlock(CRYPTO_LOCK_RAND);
+	if (locked)
+		private_RAND_lock(0);
 	return rv;
 	}
 
 static void fips_drbg_cleanup(void)
 	{
 	DRBG_CTX *dctx = &ossl_dctx;
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+	int locked;
+	locked = private_RAND_lock(1);
 	FIPS_drbg_uninstantiate(dctx);
-	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+	if (locked)
+		private_RAND_lock(0);
 	}
 
 static int fips_drbg_seed(const void *seed, int seedlen)
 	{
 	DRBG_CTX *dctx = &ossl_dctx;
+	int locked;
+	int ret = 1;
+
+	locked = private_RAND_lock(1);
 	if (dctx->rand_seed_cb)
-		return dctx->rand_seed_cb(dctx, seed, seedlen);
-	return 1;
+		ret = dctx->rand_seed_cb(dctx, seed, seedlen);
+	if (locked)
+		private_RAND_lock(0);
+	return ret;
 	}
 
 static int fips_drbg_add(const void *seed, int seedlen,
 					double add_entropy)
 	{
 	DRBG_CTX *dctx = &ossl_dctx;
+	int locked;
+	int ret = 1;
+
+	locked = private_RAND_lock(1);
 	if (dctx->rand_add_cb)
-		return dctx->rand_add_cb(dctx, seed, seedlen, add_entropy);
-	return 1;
+		ret = dctx->rand_add_cb(dctx, seed, seedlen, add_entropy);
+	if (locked)
+		private_RAND_lock(0);
+	return ret;
 	}
 
 static const RAND_METHOD rand_drbg_meth =
Index: openssl-1.0.1i/crypto/rand/md_rand.c
===================================================================
--- openssl-1.0.1i.orig/crypto/rand/md_rand.c	2014-10-15 14:16:52.715471400 +0200
+++ openssl-1.0.1i/crypto/rand/md_rand.c	2014-10-15 14:16:52.834472848 +0200
@@ -143,12 +143,6 @@ static long md_count[2]={0,0};
 static double entropy=0;
 static int initialized=0;
 
-static unsigned int crypto_lock_rand = 0; /* may be set only when a thread
-                                           * holds CRYPTO_LOCK_RAND
-                                           * (to prevent double locking) */
-/* access to lockin_thread is synchronized by CRYPTO_LOCK_RAND2 */
-static CRYPTO_THREADID locking_threadid; /* valid iff crypto_lock_rand is set */
-
 
 #ifdef PREDICT
 int rand_predictable=0;
@@ -195,7 +189,7 @@ static void ssleay_rand_add(const void *
 	long md_c[2];
 	unsigned char local_md[MD_DIGEST_LENGTH];
 	EVP_MD_CTX m;
-	int do_not_lock;
+	int locked;
 
 	if (!num)
 		return;
@@ -215,19 +209,8 @@ static void ssleay_rand_add(const void *
          * hash function.
 	 */
 
-	/* check if we already have the lock */
-	if (crypto_lock_rand)
-		{
-		CRYPTO_THREADID cur;
-		CRYPTO_THREADID_current(&cur);
-		CRYPTO_r_lock(CRYPTO_LOCK_RAND2);
-		do_not_lock = !CRYPTO_THREADID_cmp(&locking_threadid, &cur);
-		CRYPTO_r_unlock(CRYPTO_LOCK_RAND2);
-		}
-	else
-		do_not_lock = 0;
+	locked = private_RAND_lock(1);
 
-	if (!do_not_lock) CRYPTO_w_lock(CRYPTO_LOCK_RAND);
 	st_idx=state_index;
 
 	/* use our own copies of the counters so that even
@@ -259,7 +242,8 @@ static void ssleay_rand_add(const void *
 
 	md_count[1] += (num / MD_DIGEST_LENGTH) + (num % MD_DIGEST_LENGTH > 0);
 
-	if (!do_not_lock) CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+	if (locked)
+		private_RAND_lock(0);
 
 	EVP_MD_CTX_init(&m);
 	for (i=0; i<num; i+=MD_DIGEST_LENGTH)
@@ -310,7 +294,7 @@ static void ssleay_rand_add(const void *
 		}
 	EVP_MD_CTX_cleanup(&m);
 
-	if (!do_not_lock) CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+	locked = private_RAND_lock(1);
 	/* Don't just copy back local_md into md -- this could mean that
 	 * other thread's seeding remains without effect (except for
 	 * the incremented counter).  By XORing it we keep at least as
@@ -321,7 +305,8 @@ static void ssleay_rand_add(const void *
 		}
 	if (entropy < ENTROPY_NEEDED) /* stop counting when we have enough */
 	    entropy += add;
-	if (!do_not_lock) CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+	if (locked)
+		private_RAND_lock(0);
 	
 #if !defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32)
 	assert(md_c[1] == md_count[1]);
@@ -346,6 +331,7 @@ int ssleay_rand_bytes(unsigned char *buf
 	pid_t curr_pid = getpid();
 #endif
 	int do_stir_pool = 0;
+	int locked;
 
 #ifdef PREDICT
 	if (rand_predictable)
@@ -383,13 +369,7 @@ int ssleay_rand_bytes(unsigned char *buf
 	 * global 'md'.
 	 */
 	if (lock)
-		CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-
-	/* prevent ssleay_rand_bytes() from trying to obtain the lock again */
-	CRYPTO_w_lock(CRYPTO_LOCK_RAND2);
-	CRYPTO_THREADID_current(&locking_threadid);
-	CRYPTO_w_unlock(CRYPTO_LOCK_RAND2);
-	crypto_lock_rand = 1;
+		locked = private_RAND_lock(1);
 
 	/* always poll for external entropy in FIPS mode, drbg provides the 
 	 * expansion
@@ -464,9 +444,8 @@ int ssleay_rand_bytes(unsigned char *buf
 	md_count[0] += 1;
 
 	/* before unlocking, we must clear 'crypto_lock_rand' */
-	crypto_lock_rand = 0;
-	if (lock)
-		CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+	if (lock && locked)
+		private_RAND_lock(0);
 
 	while (num > 0)
 		{
@@ -519,11 +498,11 @@ int ssleay_rand_bytes(unsigned char *buf
 	MD_Update(&m,(unsigned char *)&(md_c[0]),sizeof(md_c));
 	MD_Update(&m,local_md,MD_DIGEST_LENGTH);
 	if (lock)
-		CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+		locked = private_RAND_lock(1);
 	MD_Update(&m,md,MD_DIGEST_LENGTH);
 	MD_Final(&m,md);
-	if (lock)
-		CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+	if (lock && locked)
+		private_RAND_lock(0);
 
 	EVP_MD_CTX_cleanup(&m);
 	if (ok)
@@ -553,32 +532,10 @@ static int ssleay_rand_pseudo_bytes(unsi
 
 static int ssleay_rand_status(void)
 	{
-	CRYPTO_THREADID cur;
 	int ret;
-	int do_not_lock;
+	int locked;
 
-	CRYPTO_THREADID_current(&cur);
-	/* check if we already have the lock
-	 * (could happen if a RAND_poll() implementation calls RAND_status()) */
-	if (crypto_lock_rand)
-		{
-		CRYPTO_r_lock(CRYPTO_LOCK_RAND2);
-		do_not_lock = !CRYPTO_THREADID_cmp(&locking_threadid, &cur);
-		CRYPTO_r_unlock(CRYPTO_LOCK_RAND2);
-		}
-	else
-		do_not_lock = 0;
-	
-	if (!do_not_lock)
-		{
-		CRYPTO_w_lock(CRYPTO_LOCK_RAND);
-		
-		/* prevent ssleay_rand_bytes() from trying to obtain the lock again */
-		CRYPTO_w_lock(CRYPTO_LOCK_RAND2);
-		CRYPTO_THREADID_cpy(&locking_threadid, &cur);
-		CRYPTO_w_unlock(CRYPTO_LOCK_RAND2);
-		crypto_lock_rand = 1;
-		}
+	locked = private_RAND_lock(1);
 	
 	if (!initialized)
 		{
@@ -588,13 +545,8 @@ static int ssleay_rand_status(void)
 
 	ret = entropy >= ENTROPY_NEEDED;
 
-	if (!do_not_lock)
-		{
-		/* before unlocking, we must clear 'crypto_lock_rand' */
-		crypto_lock_rand = 0;
-		
-		CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
-		}
+	if (locked)
+		private_RAND_lock(0);
 	
 	return ret;
 	}
Index: openssl-1.0.1i/crypto/rand/rand.h
===================================================================
--- openssl-1.0.1i.orig/crypto/rand/rand.h	2014-10-15 14:16:52.715471400 +0200
+++ openssl-1.0.1i/crypto/rand/rand.h	2014-10-15 14:16:52.834472848 +0200
@@ -124,6 +124,8 @@ void RAND_set_fips_drbg_type(int type, i
 int RAND_init_fips(void);
 #endif
 
+int private_RAND_lock(int lock);
+
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.
Index: openssl-1.0.1i/crypto/rand/rand_lib.c
===================================================================
--- openssl-1.0.1i.orig/crypto/rand/rand_lib.c	2014-10-15 14:16:52.741471717 +0200
+++ openssl-1.0.1i/crypto/rand/rand_lib.c	2014-10-15 14:16:52.835472860 +0200
@@ -182,6 +182,41 @@ int RAND_status(void)
 	return 0;
 	}
 
+int private_RAND_lock(int lock)
+	{
+	static int crypto_lock_rand;
+	static CRYPTO_THREADID locking_threadid;
+	int do_lock;
+
+	if (!lock)
+		{
+		crypto_lock_rand = 0;
+		CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+		return 0;
+		}
+
+	/* check if we already have the lock */
+	if (crypto_lock_rand)
+		{
+		CRYPTO_THREADID cur;
+		CRYPTO_THREADID_current(&cur);
+		CRYPTO_r_lock(CRYPTO_LOCK_RAND2);
+		do_lock = !!CRYPTO_THREADID_cmp(&locking_threadid, &cur);
+		CRYPTO_r_unlock(CRYPTO_LOCK_RAND2);
+		}
+        else
+		do_lock = 1;
+	if (do_lock)
+		{
+		CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+		CRYPTO_w_lock(CRYPTO_LOCK_RAND2);
+		CRYPTO_THREADID_current(&locking_threadid);
+		CRYPTO_w_unlock(CRYPTO_LOCK_RAND2);
+		crypto_lock_rand = 1;
+		}
+	return do_lock;
+	}
+
 #ifdef OPENSSL_FIPS
 
 /* FIPS DRBG initialisation code. This sets up the DRBG for use by the
@@ -242,9 +277,9 @@ static int drbg_rand_add(DRBG_CTX *ctx,
 	RAND_SSLeay()->add(in, inlen, entropy);
 	if (FIPS_rand_status())
 		{
-		CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+		int locked = private_RAND_lock(1);
 		FIPS_drbg_reseed(ctx, NULL, 0);
-		CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+		if (locked) private_RAND_lock(0);
 		}
 	return 1;
 	}
@@ -254,9 +289,9 @@ static int drbg_rand_seed(DRBG_CTX *ctx,
 	RAND_SSLeay()->seed(in, inlen);
 	if (FIPS_rand_status())
 		{
-		CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+		int locked = private_RAND_lock(1);
 		FIPS_drbg_reseed(ctx, NULL, 0);
-		CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+		if (locked) private_RAND_lock(0);
 		}
 	return 1;
 	}