X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdh%2Fdh_lib.c;h=f22bcf07062b457585505962e86065225a7946a5;hp=49f82d867f19be844c9c246efc04f41ffd245107;hb=c7c7a8e60155d839671297d80680e6010bff2897;hpb=64b25758edca688a30f02c260262150f7ad0bc7d diff --git a/crypto/dh/dh_lib.c b/crypto/dh/dh_lib.c index 49f82d867f..f22bcf0706 100644 --- a/crypto/dh/dh_lib.c +++ b/crypto/dh/dh_lib.c @@ -1,82 +1,17 @@ -/* crypto/dh/dh_lib.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * 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 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 acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS 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 AUTHOR OR 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. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include #include "internal/cryptlib.h" #include -#include -#ifndef OPENSSL_NO_ENGINE -# include -#endif - -static const DH_METHOD *default_DH_method = NULL; - -void DH_set_default_method(const DH_METHOD *meth) -{ - default_DH_method = meth; -} - -const DH_METHOD *DH_get_default_method(void) -{ - if (!default_DH_method) - default_DH_method = DH_OpenSSL(); - return default_DH_method; -} +#include "dh_locl.h" +#include int DH_set_method(DH *dh, const DH_METHOD *meth) { @@ -89,10 +24,8 @@ int DH_set_method(DH *dh, const DH_METHOD *meth) if (mtmp->finish) mtmp->finish(dh); #ifndef OPENSSL_NO_ENGINE - if (dh->engine) { - ENGINE_finish(dh->engine); - dh->engine = NULL; - } + ENGINE_finish(dh->engine); + dh->engine = NULL; #endif dh->meth = meth; if (meth->init) @@ -111,44 +44,50 @@ DH *DH_new_method(ENGINE *engine) if (ret == NULL) { DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE); - return (NULL); + return NULL; + } + + ret->references = 1; + ret->lock = CRYPTO_THREAD_lock_new(); + if (ret->lock == NULL) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE); + OPENSSL_free(ret); + return NULL; } ret->meth = DH_get_default_method(); #ifndef OPENSSL_NO_ENGINE + ret->flags = ret->meth->flags; /* early default init */ if (engine) { if (!ENGINE_init(engine)) { DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); - OPENSSL_free(ret); - return NULL; + goto err; } ret->engine = engine; } else ret->engine = ENGINE_get_default_DH(); if (ret->engine) { ret->meth = ENGINE_get_DH(ret->engine); - if (!ret->meth) { + if (ret->meth == NULL) { DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); - ENGINE_finish(ret->engine); - OPENSSL_free(ret); - return NULL; + goto err; } } #endif - ret->references = 1; ret->flags = ret->meth->flags; - CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); + + if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data)) + goto err; + if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { -#ifndef OPENSSL_NO_ENGINE - if (ret->engine) - ENGINE_finish(ret->engine); -#endif - CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); - OPENSSL_free(ret); + DHerr(DH_F_DH_NEW_METHOD, ERR_R_INIT_FAIL); +err: + DH_free(ret); ret = NULL; } - return (ret); + + return ret; } void DH_free(DH *r) @@ -157,28 +96,23 @@ void DH_free(DH *r) if (r == NULL) return; - i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); -#ifdef REF_PRINT - REF_PRINT("DH", r); -#endif + + CRYPTO_DOWN_REF(&r->references, &i, r->lock); + REF_PRINT_COUNT("DH", r); if (i > 0) return; -#ifdef REF_CHECK - if (i < 0) { - fprintf(stderr, "DH_free, bad reference count\n"); - abort(); - } -#endif + REF_ASSERT_ISNT(i < 0); if (r->meth->finish) r->meth->finish(r); #ifndef OPENSSL_NO_ENGINE - if (r->engine) - ENGINE_finish(r->engine); + ENGINE_finish(r->engine); #endif CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); + CRYPTO_THREAD_lock_free(r->lock); + BN_clear_free(r->p); BN_clear_free(r->g); BN_clear_free(r->q); @@ -192,24 +126,14 @@ void DH_free(DH *r) int DH_up_ref(DH *r) { - int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH); -#ifdef REF_PRINT - REF_PRINT("DH", r); -#endif -#ifdef REF_CHECK - if (i < 2) { - fprintf(stderr, "DH_up, bad reference count\n"); - abort(); - } -#endif - return ((i > 1) ? 1 : 0); -} + int i; -int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, - CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) -{ - return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp, - new_func, dup_func, free_func); + if (CRYPTO_UP_REF(&r->references, &i, r->lock) <= 0) + return 0; + + REF_PRINT_COUNT("DH", r); + REF_ASSERT_ISNT(i < 2); + return ((i > 1) ? 1 : 0); } int DH_set_ex_data(DH *d, int idx, void *arg) @@ -243,3 +167,104 @@ int DH_security_bits(const DH *dh) N = -1; return BN_security_bits(BN_num_bits(dh->p), N); } + + +void DH_get0_pqg(const DH *dh, + const BIGNUM **p, const BIGNUM **q, const BIGNUM **g) +{ + if (p != NULL) + *p = dh->p; + if (q != NULL) + *q = dh->q; + if (g != NULL) + *g = dh->g; +} + +int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g) +{ + /* If the fields p and g in d are NULL, the corresponding input + * parameters MUST be non-NULL. q may remain NULL. + */ + if ((dh->p == NULL && p == NULL) + || (dh->g == NULL && g == NULL)) + return 0; + + if (p != NULL) { + BN_free(dh->p); + dh->p = p; + } + if (q != NULL) { + BN_free(dh->q); + dh->q = q; + } + if (g != NULL) { + BN_free(dh->g); + dh->g = g; + } + + if (q != NULL) { + dh->length = BN_num_bits(q); + } + + return 1; +} + +long DH_get_length(const DH *dh) +{ + return dh->length; +} + +int DH_set_length(DH *dh, long length) +{ + dh->length = length; + return 1; +} + +void DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key) +{ + if (pub_key != NULL) + *pub_key = dh->pub_key; + if (priv_key != NULL) + *priv_key = dh->priv_key; +} + +int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key) +{ + /* If the field pub_key in dh is NULL, the corresponding input + * parameters MUST be non-NULL. The priv_key field may + * be left NULL. + */ + if (dh->pub_key == NULL && pub_key == NULL) + return 0; + + if (pub_key != NULL) { + BN_free(dh->pub_key); + dh->pub_key = pub_key; + } + if (priv_key != NULL) { + BN_free(dh->priv_key); + dh->priv_key = priv_key; + } + + return 1; +} + +void DH_clear_flags(DH *dh, int flags) +{ + dh->flags &= ~flags; +} + +int DH_test_flags(const DH *dh, int flags) +{ + return dh->flags & flags; +} + +void DH_set_flags(DH *dh, int flags) +{ + dh->flags |= flags; +} + +ENGINE *DH_get0_engine(DH *dh) +{ + return dh->engine; +}