/* * Copyright (c) 2000-2002 Apple Computer, Inc. All Rights Reserved. * * The contents of this file constitute Original Code as defined in and are * subject to the Apple Public Source License Version 1.2 (the 'License'). * You may not use this file except in compliance with the License. Please obtain * a copy of the License at http://www.apple.com/publicsource and read it before * using this file. * * This Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the * specific language governing rights and limitations under the License. */ /* 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> const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT; static DH_METHOD *default_DH_method; static int dh_meth_num = 0; static STACK_OF(CRYPTO_EX_DATA_FUNCS) *dh_meth = NULL; void DH_set_default_method(DH_METHOD *meth) { default_DH_method = meth; } DH_METHOD *DH_get_default_method(void) { if(!default_DH_method) default_DH_method = DH_OpenSSL(); return default_DH_method; } DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth) { DH_METHOD *mtmp; mtmp = dh->meth; if (mtmp->finish) mtmp->finish(dh); dh->meth = meth; if (meth->init) meth->init(dh); return mtmp; } DH *DH_new(void) { return DH_new_method(NULL); } DH *DH_new_method(DH_METHOD *meth) { DH *ret; ret=(DH *)Malloc(sizeof(DH)); if (ret == NULL) { DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE); return(NULL); } if(meth) ret->meth = meth; else ret->meth = DH_get_default_method(); 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(dh_meth,ret,&ret->ex_data); if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { CRYPTO_free_ex_data(dh_meth,ret,&ret->ex_data); 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); CRYPTO_free_ex_data(dh_meth, 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) 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); Free(r); } 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) { dh_meth_num++; return(CRYPTO_get_ex_new_index(dh_meth_num-1, &dh_meth,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(DH *dh) { return(BN_num_bytes(dh->p)); }