Convert CRYPTO_LOCK_{DH,DSA,RSA} to new multi-threading API

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>

2 files changed, 28 insertions, 32 deletions

diff --git a/crypto/rsa/rsa_lib.c b/crypto/rsa/rsa_lib.c
index 8b5015703c..9cc88142b6 100644
--- a/crypto/rsa/rsa_lib.c
+++ b/crypto/rsa/rsa_lib.c
@@ -157,18 +157,25 @@ RSA *RSA_new_method(ENGINE *engine)
         ENGINE_finish(ret->engine);
 #endif
         OPENSSL_free(ret);
-        return (NULL);
+        return NULL;
     }
 
-    if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
+    ret->lock = CRYPTO_THREAD_lock_new();
+    if (ret->lock == NULL) {
 #ifndef OPENSSL_NO_ENGINE
         ENGINE_finish(ret->engine);
 #endif
         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
         OPENSSL_free(ret);
+        return NULL;
+    }
+
+    if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
+        RSA_free(ret);
         ret = NULL;
     }
-    return (ret);
+
+    return ret;
 }
 
 void RSA_free(RSA *r)
@@ -178,7 +185,7 @@ void RSA_free(RSA *r)
     if (r == NULL)
         return;
 
-    i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA);
+    CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
     REF_PRINT_COUNT("RSA", r);
     if (i > 0)
         return;
@@ -192,6 +199,8 @@ void RSA_free(RSA *r)
 
     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
 
+    CRYPTO_THREAD_lock_free(r->lock);
+
     BN_clear_free(r->n);
     BN_clear_free(r->e);
     BN_clear_free(r->d);
@@ -208,7 +217,10 @@ void RSA_free(RSA *r)
 
 int RSA_up_ref(RSA *r)
 {
-    int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
+    int i;
+
+    if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
+        return 0;
 
     REF_PRINT_COUNT("RSA", r);
     REF_ASSERT_ISNT(i < 2);
diff --git a/crypto/rsa/rsa_ossl.c b/crypto/rsa/rsa_ossl.c
index b6b7dacb28..925cf65333 100644
--- a/crypto/rsa/rsa_ossl.c
+++ b/crypto/rsa/rsa_ossl.c
@@ -220,7 +220,7 @@ static int rsa_ossl_public_encrypt(int flen, const unsigned char *from,
 
     if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
         if (!BN_MONT_CTX_set_locked
-            (&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx))
+            (&rsa->_method_mod_n, rsa->lock, rsa->n, ctx))
             goto err;
 
     if (!rsa->meth->bn_mod_exp(ret, f, rsa->e, rsa->n, ctx,
@@ -248,18 +248,12 @@ static int rsa_ossl_public_encrypt(int flen, const unsigned char *from,
 static BN_BLINDING *rsa_get_blinding(RSA *rsa, int *local, BN_CTX *ctx)
 {
     BN_BLINDING *ret;
-    int got_write_lock = 0;
     CRYPTO_THREADID cur;
 
-    CRYPTO_r_lock(CRYPTO_LOCK_RSA);
+    CRYPTO_THREAD_write_lock(rsa->lock);
 
     if (rsa->blinding == NULL) {
-        CRYPTO_r_unlock(CRYPTO_LOCK_RSA);
-        CRYPTO_w_lock(CRYPTO_LOCK_RSA);
-        got_write_lock = 1;
-
-        if (rsa->blinding == NULL)
-            rsa->blinding = RSA_setup_blinding(rsa, ctx);
+        rsa->blinding = RSA_setup_blinding(rsa, ctx);
     }
 
     ret = rsa->blinding;
@@ -282,23 +276,13 @@ static BN_BLINDING *rsa_get_blinding(RSA *rsa, int *local, BN_CTX *ctx)
         *local = 0;
 
         if (rsa->mt_blinding == NULL) {
-            if (!got_write_lock) {
-                CRYPTO_r_unlock(CRYPTO_LOCK_RSA);
-                CRYPTO_w_lock(CRYPTO_LOCK_RSA);
-                got_write_lock = 1;
-            }
-
-            if (rsa->mt_blinding == NULL)
-                rsa->mt_blinding = RSA_setup_blinding(rsa, ctx);
+            rsa->mt_blinding = RSA_setup_blinding(rsa, ctx);
         }
         ret = rsa->mt_blinding;
     }
 
  err:
-    if (got_write_lock)
-        CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
-    else
-        CRYPTO_r_unlock(CRYPTO_LOCK_RSA);
+    CRYPTO_THREAD_unlock(rsa->lock);
     return ret;
 }
 
@@ -432,7 +416,7 @@ static int rsa_ossl_private_encrypt(int flen, const unsigned char *from,
 
         if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
             if (!BN_MONT_CTX_set_locked
-                (&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx)) {
+                (&rsa->_method_mod_n, rsa->lock, rsa->n, ctx)) {
                 BN_free(local_d);
                 goto err;
             }
@@ -566,7 +550,7 @@ static int rsa_ossl_private_decrypt(int flen, const unsigned char *from,
 
         if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
             if (!BN_MONT_CTX_set_locked
-                (&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx)) {
+                (&rsa->_method_mod_n, rsa->lock, rsa->n, ctx)) {
                 BN_free(local_d);
                 goto err;
             }
@@ -674,7 +658,7 @@ static int rsa_ossl_public_decrypt(int flen, const unsigned char *from,
 
     if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
         if (!BN_MONT_CTX_set_locked
-            (&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx))
+            (&rsa->_method_mod_n, rsa->lock, rsa->n, ctx))
             goto err;
 
     if (!rsa->meth->bn_mod_exp(ret, f, rsa->e, rsa->n, ctx,
@@ -751,9 +735,9 @@ static int rsa_ossl_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
 
         if (rsa->flags & RSA_FLAG_CACHE_PRIVATE) {
             if (!BN_MONT_CTX_set_locked
-                (&rsa->_method_mod_p, CRYPTO_LOCK_RSA, p, ctx)
+                (&rsa->_method_mod_p, rsa->lock, p, ctx)
                 || !BN_MONT_CTX_set_locked(&rsa->_method_mod_q,
-                                           CRYPTO_LOCK_RSA, q, ctx)) {
+                                           rsa->lock, q, ctx)) {
                 BN_free(local_p);
                 BN_free(local_q);
                 goto err;
@@ -769,7 +753,7 @@ static int rsa_ossl_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
 
     if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
         if (!BN_MONT_CTX_set_locked
-            (&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx))
+            (&rsa->_method_mod_n, rsa->lock, rsa->n, ctx))
             goto err;
 
     /* compute I mod q */