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263 lines
7.6 KiB
263 lines
7.6 KiB
/* crypto/dh/dh_lib.c */ |
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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#include <stdio.h> |
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#include "cryptlib.h" |
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#include <openssl/bn.h> |
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#include <openssl/dh.h> |
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#ifndef OPENSSL_NO_ENGINE |
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# include <openssl/engine.h> |
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#endif |
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#ifdef OPENSSL_FIPS |
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# include <openssl/fips.h> |
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#endif |
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const char DH_version[] = "Diffie-Hellman" OPENSSL_VERSION_PTEXT; |
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static const DH_METHOD *default_DH_method = NULL; |
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void DH_set_default_method(const DH_METHOD *meth) |
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{ |
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default_DH_method = meth; |
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} |
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const DH_METHOD *DH_get_default_method(void) |
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{ |
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if (!default_DH_method) { |
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#ifdef OPENSSL_FIPS |
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if (FIPS_mode()) |
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return FIPS_dh_openssl(); |
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else |
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return DH_OpenSSL(); |
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#else |
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default_DH_method = DH_OpenSSL(); |
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#endif |
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} |
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return default_DH_method; |
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} |
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int DH_set_method(DH *dh, const DH_METHOD *meth) |
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{ |
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/* |
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* NB: The caller is specifically setting a method, so it's not up to us |
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* to deal with which ENGINE it comes from. |
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*/ |
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const DH_METHOD *mtmp; |
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mtmp = dh->meth; |
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if (mtmp->finish) |
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mtmp->finish(dh); |
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#ifndef OPENSSL_NO_ENGINE |
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if (dh->engine) { |
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ENGINE_finish(dh->engine); |
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dh->engine = NULL; |
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} |
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#endif |
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dh->meth = meth; |
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if (meth->init) |
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meth->init(dh); |
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return 1; |
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} |
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DH *DH_new(void) |
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{ |
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return DH_new_method(NULL); |
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} |
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DH *DH_new_method(ENGINE *engine) |
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{ |
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DH *ret; |
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ret = (DH *)OPENSSL_malloc(sizeof(DH)); |
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if (ret == NULL) { |
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DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE); |
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return (NULL); |
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} |
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ret->meth = DH_get_default_method(); |
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#ifndef OPENSSL_NO_ENGINE |
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if (engine) { |
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if (!ENGINE_init(engine)) { |
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DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); |
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OPENSSL_free(ret); |
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return NULL; |
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} |
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ret->engine = engine; |
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} else |
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ret->engine = ENGINE_get_default_DH(); |
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if (ret->engine) { |
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ret->meth = ENGINE_get_DH(ret->engine); |
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if (!ret->meth) { |
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DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); |
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ENGINE_finish(ret->engine); |
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OPENSSL_free(ret); |
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return NULL; |
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} |
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} |
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#endif |
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ret->pad = 0; |
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ret->version = 0; |
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ret->p = NULL; |
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ret->g = NULL; |
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ret->length = 0; |
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ret->pub_key = NULL; |
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ret->priv_key = NULL; |
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ret->q = NULL; |
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ret->j = NULL; |
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ret->seed = NULL; |
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ret->seedlen = 0; |
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ret->counter = NULL; |
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ret->method_mont_p = NULL; |
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ret->references = 1; |
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ret->flags = ret->meth->flags & ~DH_FLAG_NON_FIPS_ALLOW; |
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CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); |
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if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { |
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#ifndef OPENSSL_NO_ENGINE |
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if (ret->engine) |
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ENGINE_finish(ret->engine); |
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#endif |
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); |
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OPENSSL_free(ret); |
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ret = NULL; |
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} |
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return (ret); |
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} |
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void DH_free(DH *r) |
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{ |
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int i; |
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if (r == NULL) |
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return; |
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i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); |
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#ifdef REF_PRINT |
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REF_PRINT("DH", r); |
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#endif |
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if (i > 0) |
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return; |
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#ifdef REF_CHECK |
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if (i < 0) { |
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fprintf(stderr, "DH_free, bad reference count\n"); |
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abort(); |
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} |
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#endif |
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if (r->meth->finish) |
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r->meth->finish(r); |
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#ifndef OPENSSL_NO_ENGINE |
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if (r->engine) |
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ENGINE_finish(r->engine); |
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#endif |
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); |
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if (r->p != NULL) |
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BN_clear_free(r->p); |
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if (r->g != NULL) |
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BN_clear_free(r->g); |
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if (r->q != NULL) |
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BN_clear_free(r->q); |
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if (r->j != NULL) |
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BN_clear_free(r->j); |
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if (r->seed) |
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OPENSSL_free(r->seed); |
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if (r->counter != NULL) |
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BN_clear_free(r->counter); |
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if (r->pub_key != NULL) |
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BN_clear_free(r->pub_key); |
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if (r->priv_key != NULL) |
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BN_clear_free(r->priv_key); |
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OPENSSL_free(r); |
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} |
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int DH_up_ref(DH *r) |
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{ |
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int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH); |
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#ifdef REF_PRINT |
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REF_PRINT("DH", r); |
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#endif |
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#ifdef REF_CHECK |
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if (i < 2) { |
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fprintf(stderr, "DH_up, bad reference count\n"); |
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abort(); |
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} |
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#endif |
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return ((i > 1) ? 1 : 0); |
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} |
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int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
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CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) |
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{ |
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return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp, |
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new_func, dup_func, free_func); |
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} |
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int DH_set_ex_data(DH *d, int idx, void *arg) |
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{ |
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return (CRYPTO_set_ex_data(&d->ex_data, idx, arg)); |
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} |
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void *DH_get_ex_data(DH *d, int idx) |
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{ |
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return (CRYPTO_get_ex_data(&d->ex_data, idx)); |
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} |
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int DH_size(const DH *dh) |
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{ |
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return (BN_num_bytes(dh->p)); |
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}
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