| /* crypto/dh/dh_lib.c */ |
| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * 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.] |
| */ |
| |
| #include <stdio.h> |
| #include "cryptlib.h" |
| #include <openssl/bn.h> |
| #include <openssl/dh.h> |
| #ifndef OPENSSL_NO_ENGINE |
| #include <openssl/engine.h> |
| #endif |
| |
| const char DH_version[]="Diffie-Hellman" OPENSSL_VERSION_PTEXT; |
| |
| 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; |
| } |
| |
| int DH_set_method(DH *dh, const DH_METHOD *meth) |
| { |
| /* NB: The caller is specifically setting a method, so it's not up to us |
| * to deal with which ENGINE it comes from. */ |
| const DH_METHOD *mtmp; |
| mtmp = dh->meth; |
| if (mtmp->finish) mtmp->finish(dh); |
| #ifndef OPENSSL_NO_ENGINE |
| if (dh->engine) |
| { |
| ENGINE_finish(dh->engine); |
| dh->engine = NULL; |
| } |
| #endif |
| dh->meth = meth; |
| if (meth->init) meth->init(dh); |
| return 1; |
| } |
| |
| DH *DH_new(void) |
| { |
| return DH_new_method(NULL); |
| } |
| |
| DH *DH_new_method(ENGINE *engine) |
| { |
| DH *ret; |
| |
| ret=(DH *)OPENSSL_malloc(sizeof(DH)); |
| if (ret == NULL) |
| { |
| DHerr(DH_F_DH_NEW_METHOD,ERR_R_MALLOC_FAILURE); |
| return(NULL); |
| } |
| |
| ret->meth = DH_get_default_method(); |
| #ifndef OPENSSL_NO_ENGINE |
| if (engine) |
| { |
| if (!ENGINE_init(engine)) |
| { |
| DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); |
| OPENSSL_free(ret); |
| return NULL; |
| } |
| ret->engine = engine; |
| } |
| else |
| ret->engine = ENGINE_get_default_DH(); |
| if(ret->engine) |
| { |
| ret->meth = ENGINE_get_DH(ret->engine); |
| if(!ret->meth) |
| { |
| DHerr(DH_F_DH_NEW_METHOD,ERR_R_ENGINE_LIB); |
| ENGINE_finish(ret->engine); |
| OPENSSL_free(ret); |
| return NULL; |
| } |
| } |
| #endif |
| |
| ret->pad=0; |
| ret->version=0; |
| ret->p=NULL; |
| ret->g=NULL; |
| ret->length=0; |
| ret->pub_key=NULL; |
| ret->priv_key=NULL; |
| ret->q=NULL; |
| ret->j=NULL; |
| ret->seed = NULL; |
| ret->seedlen = 0; |
| ret->counter = NULL; |
| ret->method_mont_p=NULL; |
| ret->references = 1; |
| ret->flags=ret->meth->flags; |
| CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); |
| 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); |
| ret=NULL; |
| } |
| return(ret); |
| } |
| |
| void DH_free(DH *r) |
| { |
| int i; |
| if(r == NULL) return; |
| i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); |
| #ifdef REF_PRINT |
| REF_PRINT("DH",r); |
| #endif |
| if (i > 0) return; |
| #ifdef REF_CHECK |
| if (i < 0) |
| { |
| fprintf(stderr,"DH_free, bad reference count\n"); |
| abort(); |
| } |
| #endif |
| |
| if (r->meth->finish) |
| r->meth->finish(r); |
| #ifndef OPENSSL_NO_ENGINE |
| if (r->engine) |
| ENGINE_finish(r->engine); |
| #endif |
| |
| CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); |
| |
| if (r->p != NULL) BN_clear_free(r->p); |
| if (r->g != NULL) BN_clear_free(r->g); |
| if (r->q != NULL) BN_clear_free(r->q); |
| if (r->j != NULL) BN_clear_free(r->j); |
| if (r->seed) OPENSSL_free(r->seed); |
| if (r->counter != NULL) BN_clear_free(r->counter); |
| if (r->pub_key != NULL) BN_clear_free(r->pub_key); |
| if (r->priv_key != NULL) BN_clear_free(r->priv_key); |
| OPENSSL_free(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 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); |
| } |
| |
| int DH_set_ex_data(DH *d, int idx, void *arg) |
| { |
| return(CRYPTO_set_ex_data(&d->ex_data,idx,arg)); |
| } |
| |
| void *DH_get_ex_data(DH *d, int idx) |
| { |
| return(CRYPTO_get_ex_data(&d->ex_data,idx)); |
| } |
| |
| int DH_size(const DH *dh) |
| { |
| return(BN_num_bytes(dh->p)); |
| } |
