1/* 2 * Copyright (c) 2000-2002,2011,2014 Apple 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.h */ 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#ifndef HEADER_DH_H 77#define HEADER_DH_H 78 79#ifdef NO_DH 80#error DH is disabled. 81#endif 82 83#ifndef NO_BIO 84#include <openssl/bio.h> 85#endif 86#include <openssl/bn.h> 87#include <openssl/crypto.h> 88 89#define DH_FLAG_CACHE_MONT_P 0x01 90 91#ifdef __cplusplus 92extern "C" { 93#endif 94 95typedef struct dh_st DH; 96 97typedef struct dh_method { 98 const char *name; 99 /* Methods here */ 100 int (*generate_key)(DH *dh); 101 int (*compute_key)(unsigned char *key,BIGNUM *pub_key,DH *dh); 102 int (*bn_mod_exp)(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p, 103 const BIGNUM *m, BN_CTX *ctx, 104 BN_MONT_CTX *m_ctx); /* Can be null */ 105 106 int (*init)(DH *dh); 107 int (*finish)(DH *dh); 108 int flags; 109 char *app_data; 110} DH_METHOD; 111 112struct dh_st 113 { 114 /* This first argument is used to pick up errors when 115 * a DH is passed instead of a EVP_PKEY */ 116 int pad; 117 int version; 118 BIGNUM *p; 119 BIGNUM *g; 120 int length; /* optional */ 121 BIGNUM *pub_key; /* g^x */ 122 BIGNUM *priv_key; /* x */ 123 124 int flags; 125 char *method_mont_p; 126 /* Place holders if we want to do X9.42 DH */ 127 BIGNUM *q; 128 BIGNUM *j; 129 unsigned char *seed; 130 int seedlen; 131 BIGNUM *counter; 132 133 int references; 134 CRYPTO_EX_DATA ex_data; 135 DH_METHOD *meth; 136 }; 137 138#define DH_GENERATOR_2 2 139/* #define DH_GENERATOR_3 3 */ 140#define DH_GENERATOR_5 5 141 142/* DH_check error codes */ 143#define DH_CHECK_P_NOT_PRIME 0x01 144#define DH_CHECK_P_NOT_SAFE_PRIME 0x02 145#define DH_UNABLE_TO_CHECK_GENERATOR 0x04 146#define DH_NOT_SUITABLE_GENERATOR 0x08 147 148/* primes p where (p-1)/2 is prime too are called "safe"; we define 149 this for backward compatibility: */ 150#define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME 151 152#define DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \ 153 (char *(*)())d2i_DHparams,(char *)(x)) 154#define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \ 155 (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x)) 156#define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \ 157 (unsigned char *)(x)) 158#define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \ 159 (char *(*)())d2i_DHparams,(bp),(unsigned char **)(x)) 160#ifdef __cplusplus 161#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \ 162 (unsigned char *)(x)) 163#else 164#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \ 165 (unsigned char *)(x)) 166#endif 167 168DH_METHOD *DH_OpenSSL(void); 169 170void DH_set_default_method(DH_METHOD *meth); 171DH_METHOD *DH_get_default_method(void); 172DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth); 173DH *DH_new_method(DH_METHOD *meth); 174 175DH * DH_new(void); 176void DH_free(DH *dh); 177int DH_size(DH *dh); 178int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 179 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); 180int DH_set_ex_data(DH *d, int idx, void *arg); 181void *DH_get_ex_data(DH *d, int idx); 182DH * DH_generate_parameters(int prime_len,int generator, 183 void (*callback)(int,int,void *),void *cb_arg); 184int DH_check(DH *dh,int *codes); 185int DH_generate_key(DH *dh); 186int DH_compute_key(unsigned char *key,BIGNUM *pub_key,DH *dh); 187DH * d2i_DHparams(DH **a,unsigned char **pp, long length); 188int i2d_DHparams(DH *a,unsigned char **pp); 189#ifndef NO_FP_API 190int DHparams_print_fp(FILE *fp, DH *x); 191#endif 192#ifndef NO_BIO 193int DHparams_print(BIO *bp, DH *x); 194#else 195int DHparams_print(char *bp, DH *x); 196#endif 197void ERR_load_DH_strings(void ); 198 199/* BEGIN ERROR CODES */ 200/* The following lines are auto generated by the script mkerr.pl. Any changes 201 * made after this point may be overwritten when the script is next run. 202 */ 203 204/* Error codes for the DH functions. */ 205 206/* Function codes. */ 207#define DH_F_DHPARAMS_PRINT 100 208#define DH_F_DHPARAMS_PRINT_FP 101 209#define DH_F_DH_COMPUTE_KEY 102 210#define DH_F_DH_GENERATE_KEY 103 211#define DH_F_DH_GENERATE_PARAMETERS 104 212#define DH_F_DH_NEW 105 213 214/* Reason codes. */ 215#define DH_R_NO_PRIVATE_VALUE 100 216 217#ifdef __cplusplus 218} 219#endif 220#endif 221 222