1/* 2 * Copyright (c) 2000-2002 Apple Computer, Inc. All Rights Reserved. 3 * 4 * The contents of this file constitute Original Code as defined in and are 5 * subject to the Apple Public Source License Version 1.2 (the 'License'). 6 * You may not use this file except in compliance with the License. Please obtain 7 * a copy of the License at http://www.apple.com/publicsource and read it before 8 * using this file. 9 * 10 * This Original Code and all software distributed under the License are 11 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS 12 * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT 13 * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 14 * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the 15 * specific language governing rights and limitations under the License. 16 */ 17 18/* crypto/dh/dh_lib.c */ 19/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 20 * All rights reserved. 21 * 22 * This package is an SSL implementation written 23 * by Eric Young (eay@cryptsoft.com). 24 * The implementation was written so as to conform with Netscapes SSL. 25 * 26 * This library is free for commercial and non-commercial use as long as 27 * the following conditions are aheared to. The following conditions 28 * apply to all code found in this distribution, be it the RC4, RSA, 29 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 30 * included with this distribution is covered by the same copyright terms 31 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 32 * 33 * Copyright remains Eric Young's, and as such any Copyright notices in 34 * the code are not to be removed. 35 * If this package is used in a product, Eric Young should be given attribution 36 * as the author of the parts of the library used. 37 * This can be in the form of a textual message at program startup or 38 * in documentation (online or textual) provided with the package. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * "This product includes cryptographic software written by 51 * Eric Young (eay@cryptsoft.com)" 52 * The word 'cryptographic' can be left out if the rouines from the library 53 * being used are not cryptographic related :-). 54 * 4. If you include any Windows specific code (or a derivative thereof) from 55 * the apps directory (application code) you must include an acknowledgement: 56 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 57 * 58 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * The licence and distribution terms for any publically available version or 71 * derivative of this code cannot be changed. i.e. this code cannot simply be 72 * copied and put under another distribution licence 73 * [including the GNU Public Licence.] 74 */ 75 76#include <stdio.h> 77#include "cryptlib.h" 78#include <openssl/bn.h> 79#include <openssl/dh.h> 80 81const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT; 82 83static DH_METHOD *default_DH_method; 84static int dh_meth_num = 0; 85static STACK_OF(CRYPTO_EX_DATA_FUNCS) *dh_meth = NULL; 86 87void DH_set_default_method(DH_METHOD *meth) 88{ 89 default_DH_method = meth; 90} 91 92DH_METHOD *DH_get_default_method(void) 93{ 94 if(!default_DH_method) default_DH_method = DH_OpenSSL(); 95 return default_DH_method; 96} 97 98DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth) 99{ 100 DH_METHOD *mtmp; 101 mtmp = dh->meth; 102 if (mtmp->finish) mtmp->finish(dh); 103 dh->meth = meth; 104 if (meth->init) meth->init(dh); 105 return mtmp; 106} 107 108DH *DH_new(void) 109{ 110 return DH_new_method(NULL); 111} 112 113DH *DH_new_method(DH_METHOD *meth) 114 { 115 DH *ret; 116 ret=(DH *)Malloc(sizeof(DH)); 117 118 if (ret == NULL) 119 { 120 DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE); 121 return(NULL); 122 } 123 if(meth) ret->meth = meth; 124 else ret->meth = DH_get_default_method(); 125 ret->pad=0; 126 ret->version=0; 127 ret->p=NULL; 128 ret->g=NULL; 129 ret->length=0; 130 ret->pub_key=NULL; 131 ret->priv_key=NULL; 132 ret->q=NULL; 133 ret->j=NULL; 134 ret->seed = NULL; 135 ret->seedlen = 0; 136 ret->counter = NULL; 137 ret->method_mont_p=NULL; 138 ret->references = 1; 139 ret->flags=ret->meth->flags; 140 CRYPTO_new_ex_data(dh_meth,ret,&ret->ex_data); 141 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) 142 { 143 CRYPTO_free_ex_data(dh_meth,ret,&ret->ex_data); 144 Free(ret); 145 ret=NULL; 146 } 147 return(ret); 148 } 149 150void DH_free(DH *r) 151 { 152 int i; 153 if(r == NULL) return; 154 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); 155#ifdef REF_PRINT 156 REF_PRINT("DH",r); 157#endif 158 if (i > 0) return; 159#ifdef REF_CHECK 160 if (i < 0) 161 { 162 fprintf(stderr,"DH_free, bad reference count\n"); 163 abort(); 164 } 165#endif 166 167 if(r->meth->finish) r->meth->finish(r); 168 169 CRYPTO_free_ex_data(dh_meth, r, &r->ex_data); 170 171 if (r->p != NULL) BN_clear_free(r->p); 172 if (r->g != NULL) BN_clear_free(r->g); 173 if (r->q != NULL) BN_clear_free(r->q); 174 if (r->j != NULL) BN_clear_free(r->j); 175 if (r->seed) Free(r->seed); 176 if (r->counter != NULL) BN_clear_free(r->counter); 177 if (r->pub_key != NULL) BN_clear_free(r->pub_key); 178 if (r->priv_key != NULL) BN_clear_free(r->priv_key); 179 Free(r); 180 } 181 182int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 183 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 184 { 185 dh_meth_num++; 186 return(CRYPTO_get_ex_new_index(dh_meth_num-1, 187 &dh_meth,argl,argp,new_func,dup_func,free_func)); 188 } 189 190int DH_set_ex_data(DH *d, int idx, void *arg) 191 { 192 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg)); 193 } 194 195void *DH_get_ex_data(DH *d, int idx) 196 { 197 return(CRYPTO_get_ex_data(&d->ex_data,idx)); 198 } 199 200int DH_size(DH *dh) 201 { 202 return(BN_num_bytes(dh->p)); 203 } 204