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openssl-1_0_0.10544
openssl-fipslocking.patch
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File openssl-fipslocking.patch of Package openssl-1_0_0.10544
Index: openssl-1.0.2n/crypto/fips/fips_drbg_rand.c =================================================================== --- openssl-1.0.2n.orig/crypto/fips/fips_drbg_rand.c 2017-12-08 13:31:56.267746606 +0100 +++ openssl-1.0.2n/crypto/fips/fips_drbg_rand.c 2017-12-08 13:31:56.307747247 +0100 @@ -82,7 +82,8 @@ static int fips_drbg_bytes(unsigned char if (count > dctx->min_entropy) RAND_load_file("/dev/urandom", count - dctx->min_entropy); - CRYPTO_w_lock(CRYPTO_LOCK_RAND); + int locked; + locked = private_RAND_lock(1); do { size_t rcnt; if (count > (int)dctx->max_request) @@ -111,7 +112,8 @@ 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; } @@ -126,34 +128,50 @@ 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-1.0.2n/crypto/rand/md_rand.c =================================================================== --- openssl-1.0.2n.orig/crypto/rand/md_rand.c 2017-12-08 13:31:56.267746606 +0100 +++ openssl-1.0.2n/crypto/rand/md_rand.c 2017-12-08 13:31:56.311747311 +0100 @@ -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) { @@ -311,8 +294,7 @@ static void ssleay_rand_add(const void * } } - 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 @@ -324,8 +306,8 @@ 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]); @@ -353,6 +335,7 @@ 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) { @@ -394,13 +377,7 @@ 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 @@ -475,9 +452,8 @@ 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 */ @@ -535,15 +511,15 @@ int ssleay_rand_bytes(unsigned char *buf !MD_Update(&m, local_md, MD_DIGEST_LENGTH)) goto err; if (lock) - CRYPTO_w_lock(CRYPTO_LOCK_RAND); + locked = private_RAND_lock(1); if (!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); goto err; } - if (lock) - CRYPTO_w_unlock(CRYPTO_LOCK_RAND); + if (lock && locked) + private_RAND_lock(0); EVP_MD_CTX_cleanup(&m); if (ok) @@ -577,33 +553,10 @@ 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(); @@ -612,12 +565,8 @@ 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-1.0.2n/crypto/rand/rand.h =================================================================== --- openssl-1.0.2n.orig/crypto/rand/rand.h 2017-12-08 13:31:56.143744621 +0100 +++ openssl-1.0.2n/crypto/rand/rand.h 2017-12-08 13:31:56.311747311 +0100 @@ -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-1.0.2n/crypto/rand/rand_lib.c =================================================================== --- openssl-1.0.2n.orig/crypto/rand/rand_lib.c 2017-12-08 13:31:56.267746606 +0100 +++ openssl-1.0.2n/crypto/rand/rand_lib.c 2017-12-08 13:32:55.968702015 +0100 @@ -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, in, inlen); - 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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