File openssl-fipslocking.patch of Package openssl

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File openssl-fipslocking.patch of Package openssl (Revision 87d49f12f6232d376009f4c8b30d01d5)

Currently displaying revision 87d49f12f6232d376009f4c8b30d01d5 , Show latest

Index: openssl-1.0.2j/crypto/fips/fips_drbg_rand.c
===================================================================
--- openssl-1.0.2j.orig/crypto/fips/fips_drbg_rand.c	2017-07-17 11:58:29.396148444 +0200
+++ openssl-1.0.2j/crypto/fips/fips_drbg_rand.c	2017-07-17 12:00:20.749927259 +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;
         if (count > (int)dctx->max_request)
@@ -106,7 +107,8 @@ 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;
 }
 
@@ -121,34 +123,50 @@ 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-1.0.2j/crypto/rand/md_rand.c
===================================================================
--- openssl-1.0.2j.orig/crypto/rand/md_rand.c	2017-07-17 11:58:15.359924624 +0200
+++ openssl-1.0.2j/crypto/rand/md_rand.c	2017-07-17 11:58:32.936204890 +0200
@@ -144,13 +144,6 @@ 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 */
-/* valid iff crypto_lock_rand is set */
-static CRYPTO_THREADID locking_threadid;
-
 #ifdef PREDICT
 int rand_predictable = 0;
 #endif
@@ -196,7 +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;
@@ -216,18 +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;
 
     /*
@@ -258,8 +241,8 @@ 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) {
@@ -307,8 +290,7 @@ 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
@@ -320,8 +302,8 @@ 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 +328,7 @@ 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 +366,7 @@ 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 +441,8 @@ 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) {
         /* num_ceil -= MD_DIGEST_LENGTH/2 */
@@ -515,11 +491,11 @@ 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)
@@ -549,33 +525,10 @@ static int ssleay_rand_pseudo_bytes(unsi
 
 static int ssleay_rand_status(void)
 {
-    CRYPTO_THREADID cur;
     int ret;
-    int do_not_lock;
-
-    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;
+    int locked;
 
-    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) {
         RAND_poll();
@@ -584,12 +537,8 @@ 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-1.0.2j/crypto/rand/rand.h
===================================================================
--- openssl-1.0.2j.orig/crypto/rand/rand.h	2017-07-17 11:58:29.400148507 +0200
+++ openssl-1.0.2j/crypto/rand/rand.h	2017-07-17 11:58:32.936204890 +0200
@@ -123,6 +123,8 @@ 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
Index: openssl-1.0.2j/crypto/rand/rand_lib.c
===================================================================
--- openssl-1.0.2j.orig/crypto/rand/rand_lib.c	2017-07-17 11:58:29.400148507 +0200
+++ openssl-1.0.2j/crypto/rand/rand_lib.c	2017-07-17 12:01:13.734772704 +0200
@@ -176,6 +176,41 @@ 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
 
 /*
@@ -237,9 +272,10 @@ 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;
 }
@@ -248,9 +284,10 @@ 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;
 }

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File openssl-fipslocking.patch of Package openssl (Revision 87d49f12f6232d376009f4c8b30d01d5)

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