diff options
author | Bodo Möller <bodo@openssl.org> | 2006-06-14 08:55:23 +0000 |
---|---|---|
committer | Bodo Möller <bodo@openssl.org> | 2006-06-14 08:55:23 +0000 |
commit | 675f605d44630d491f10c846344679e8fc90b119 (patch) | |
tree | 0931cdd93ee98c003ccd360544851185c271034c /crypto | |
parent | 6a983d4287e315105551ac84c82868c6f83a0de7 (diff) |
Thread-safety fixes
Diffstat (limited to 'crypto')
-rw-r--r-- | crypto/bn/bn_mont.c | 85 | ||||
-rw-r--r-- | crypto/err/err.c | 15 | ||||
-rw-r--r-- | crypto/rsa/rsa_eay.c | 57 |
3 files changed, 128 insertions, 29 deletions
diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c index c2cfecf370..b532305b80 100644 --- a/crypto/bn/bn_mont.c +++ b/crypto/bn/bn_mont.c @@ -55,6 +55,59 @@ * copied and put under another distribution licence * [including the GNU Public Licence.] */ +/* ==================================================================== + * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ /* * Details about Montgomery multiplication algorithms can be found at @@ -427,18 +480,30 @@ BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to, BN_MONT_CTX *from) BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock, const BIGNUM *mod, BN_CTX *ctx) { - if (*pmont) - return *pmont; - CRYPTO_w_lock(lock); + int got_write_lock = 0; + + CRYPTO_r_lock(lock); if (!*pmont) { - BN_MONT_CTX *mtmp; - mtmp = BN_MONT_CTX_new(); - if (mtmp && !BN_MONT_CTX_set(mtmp, mod, ctx)) - BN_MONT_CTX_free(mtmp); - else - *pmont = mtmp; + CRYPTO_r_unlock(lock); + CRYPTO_w_lock(lock); + got_write_lock = 1; + + if (!*pmont) + { + BN_MONT_CTX *mtmp; + mtmp = BN_MONT_CTX_new(); + if (mtmp && !BN_MONT_CTX_set(mtmp, mod, ctx)) + BN_MONT_CTX_free(mtmp); + else + *pmont = mtmp; + } } - CRYPTO_w_unlock(lock); + + if (got_write_lock) + CRYPTO_w_unlock(lock); + else + CRYPTO_r_unlock(lock); + return *pmont; } diff --git a/crypto/err/err.c b/crypto/err/err.c index 84741326ac..3367a75d99 100644 --- a/crypto/err/err.c +++ b/crypto/err/err.c @@ -550,9 +550,20 @@ static void build_SYS_str_reasons(void) int i; static int init = 1; - if (!init) return; - + CRYPTO_r_lock(CRYPTO_LOCK_ERR); + if (!init) + { + CRYPTO_r_unlock(CRYPTO_LOCK_ERR); + return; + } + + CRYPTO_r_unlock(CRYPTO_LOCK_ERR); CRYPTO_w_lock(CRYPTO_LOCK_ERR); + if (!init) + { + CRYPTO_w_unlock(CRYPTO_LOCK_ERR); + return; + } for (i = 1; i <= NUM_SYS_STR_REASONS; i++) { diff --git a/crypto/rsa/rsa_eay.c b/crypto/rsa/rsa_eay.c index 56da944845..69cabd2716 100644 --- a/crypto/rsa/rsa_eay.c +++ b/crypto/rsa/rsa_eay.c @@ -56,7 +56,7 @@ * [including the GNU Public Licence.] */ /* ==================================================================== - * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. + * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -238,40 +238,63 @@ err: return(r); } -static BN_BLINDING *rsa_get_blinding(RSA *rsa, BIGNUM **r, int *local, BN_CTX *ctx) +static BN_BLINDING *rsa_get_blinding(RSA *rsa, int *local, BN_CTX *ctx) { BN_BLINDING *ret; + int got_write_lock = 0; + + CRYPTO_r_lock(CRYPTO_LOCK_RSA); if (rsa->blinding == NULL) { + CRYPTO_r_unlock(CRYPTO_LOCK_RSA); + CRYPTO_w_lock(CRYPTO_LOCK_RSA); + got_write_lock = 1; + if (rsa->blinding == NULL) - { - CRYPTO_w_lock(CRYPTO_LOCK_RSA); - if (rsa->blinding == NULL) - rsa->blinding = RSA_setup_blinding(rsa, ctx); - CRYPTO_w_unlock(CRYPTO_LOCK_RSA); - } + rsa->blinding = RSA_setup_blinding(rsa, ctx); } ret = rsa->blinding; if (ret == NULL) - return NULL; + goto err; - if (BN_BLINDING_get_thread_id(ret) != CRYPTO_thread_id()) + if (BN_BLINDING_get_thread_id(ret) == CRYPTO_thread_id()) { - *local = 0; + /* rsa->blinding is ours! */ + + *local = 1; + } + else + { + /* resort to rsa->mt_blinding instead */ + + *local = 0; /* instructs rsa_blinding_convert(), rsa_blinding_invert() + * that the BN_BLINDING is shared, meaning that accesses + * require locks, and that the blinding factor must be + * stored outside the BN_BLINDING + */ + if (rsa->mt_blinding == NULL) { - CRYPTO_w_lock(CRYPTO_LOCK_RSA); + 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); - CRYPTO_w_unlock(CRYPTO_LOCK_RSA); } ret = rsa->mt_blinding; } - else - *local = 1; + err: + if (got_write_lock) + CRYPTO_w_unlock(CRYPTO_LOCK_RSA); + else + CRYPTO_r_unlock(CRYPTO_LOCK_RSA); return ret; } @@ -358,7 +381,7 @@ static int RSA_eay_private_encrypt(int flen, const unsigned char *from, if (!(rsa->flags & RSA_FLAG_NO_BLINDING)) { - blinding = rsa_get_blinding(rsa, &br, &local_blinding, ctx); + blinding = rsa_get_blinding(rsa, &local_blinding, ctx); if (blinding == NULL) { RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_INTERNAL_ERROR); @@ -479,7 +502,7 @@ static int RSA_eay_private_decrypt(int flen, const unsigned char *from, if (!(rsa->flags & RSA_FLAG_NO_BLINDING)) { - blinding = rsa_get_blinding(rsa, &br, &local_blinding, ctx); + blinding = rsa_get_blinding(rsa, &local_blinding, ctx); if (blinding == NULL) { RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT, ERR_R_INTERNAL_ERROR); |