diff options
Diffstat (limited to 'crypto/openssl/crypto/rand/md_rand.c')
| -rw-r--r-- | crypto/openssl/crypto/rand/md_rand.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/crypto/openssl/crypto/rand/md_rand.c b/crypto/openssl/crypto/rand/md_rand.c index 1e3bcb9bc426a..888b4eb8dd0bd 100644 --- a/crypto/openssl/crypto/rand/md_rand.c +++ b/crypto/openssl/crypto/rand/md_rand.c @@ -159,7 +159,6 @@ const char RAND_version[]="RAND" OPENSSL_VERSION_PTEXT; static void ssleay_rand_cleanup(void); static void ssleay_rand_seed(const void *buf, int num); static void ssleay_rand_add(const void *buf, int num, double add_entropy); -static int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo); static int ssleay_rand_nopseudo_bytes(unsigned char *buf, int num); static int ssleay_rand_pseudo_bytes(unsigned char *buf, int num); static int ssleay_rand_status(void); @@ -198,6 +197,9 @@ static void ssleay_rand_add(const void *buf, int num, double add) EVP_MD_CTX m; int do_not_lock; + if (!num) + return; + /* * (Based on the rand(3) manpage) * @@ -331,7 +333,7 @@ static void ssleay_rand_seed(const void *buf, int num) ssleay_rand_add(buf, num, (double)num); } -static int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo) +int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo, int lock) { static volatile int stirred_pool = 0; int i,j,k,st_num,st_idx; @@ -380,8 +382,8 @@ static int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo) * are fed into the hash function and the results are kept in the * global 'md'. */ - - CRYPTO_w_lock(CRYPTO_LOCK_RAND); + 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); @@ -460,7 +462,8 @@ static int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo) /* before unlocking, we must clear 'crypto_lock_rand' */ crypto_lock_rand = 0; - CRYPTO_w_unlock(CRYPTO_LOCK_RAND); + if (lock) + CRYPTO_w_unlock(CRYPTO_LOCK_RAND); while (num > 0) { @@ -512,10 +515,12 @@ static int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo) MD_Init(&m); MD_Update(&m,(unsigned char *)&(md_c[0]),sizeof(md_c)); MD_Update(&m,local_md,MD_DIGEST_LENGTH); - CRYPTO_w_lock(CRYPTO_LOCK_RAND); + if (lock) + CRYPTO_w_lock(CRYPTO_LOCK_RAND); MD_Update(&m,md,MD_DIGEST_LENGTH); MD_Final(&m,md); - CRYPTO_w_unlock(CRYPTO_LOCK_RAND); + if (lock) + CRYPTO_w_unlock(CRYPTO_LOCK_RAND); EVP_MD_CTX_cleanup(&m); if (ok) @@ -533,14 +538,14 @@ static int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo) static int ssleay_rand_nopseudo_bytes(unsigned char *buf, int num) { - return ssleay_rand_bytes(buf, num, 0); + return ssleay_rand_bytes(buf, num, 0, 1); } /* pseudo-random bytes that are guaranteed to be unique but not unpredictable */ static int ssleay_rand_pseudo_bytes(unsigned char *buf, int num) { - return ssleay_rand_bytes(buf, num, 1); + return ssleay_rand_bytes(buf, num, 1, 1); } static int ssleay_rand_status(void) |