diff options
| author | Dr. Stephen Henson <steve@openssl.org> | 2013-12-04 13:39:04 +0000 |
|---|---|---|
| committer | Dr. Stephen Henson <steve@openssl.org> | 2013-12-08 13:21:02 +0000 |
| commit | c43dc3dd77c48898104dfca06793f6836805e7eb (patch) | |
| tree | 409d955d264fc7e3c1ae9fc76ea804509059ac11 /crypto/rand | |
| parent | e5eab8a19988b03d63802d2d79779cff15f607c7 (diff) | |
Avoid multiple locks in FIPS mode.
PR: 3176.
In FIPS mode ssleay_rand_bytes is only used for PRNG seeding and is
performed in either a single threaded context (when the PRNG is first
initialised) or under a lock (reseeding). To avoid multiple locks disable
use of CRYPTO_LOCK_RAND in FIPS mode in ssleay_rand_bytes.
Diffstat (limited to 'crypto/rand')
| -rw-r--r-- | crypto/rand/md_rand.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/crypto/rand/md_rand.c b/crypto/rand/md_rand.c index 1e3bcb9bc4..2dd22d2beb 100644 --- a/crypto/rand/md_rand.c +++ b/crypto/rand/md_rand.c @@ -380,8 +380,11 @@ 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); +#ifdef OPENSSL_FIPS + /* NB: in FIPS mode we are already under a lock */ + if (FIPS_mode()) +#endif + 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 +463,10 @@ 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); +#ifdef OPENSSL_FIPS + if (FIPS_mode()) +#endif + CRYPTO_w_unlock(CRYPTO_LOCK_RAND); while (num > 0) { @@ -512,10 +518,16 @@ 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); +#ifdef OPENSSL_FIPS + if (FIPS_mode()) +#endif + CRYPTO_w_lock(CRYPTO_LOCK_RAND); MD_Update(&m,md,MD_DIGEST_LENGTH); MD_Final(&m,md); - CRYPTO_w_unlock(CRYPTO_LOCK_RAND); +#ifdef OPENSSL_FIPS + if (FIPS_mode()) +#endif + CRYPTO_w_unlock(CRYPTO_LOCK_RAND); EVP_MD_CTX_cleanup(&m); if (ok) |