AppleCSP/open_ssl/openssl/dh.h

   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.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
  92 extern "C" {
  93 #endif
  94
  95 typedef struct dh_st DH;
  96
  97 typedef 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
 112 struct 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
 168 DH_METHOD *DH_OpenSSL(void);
 169
 170 void DH_set_default_method(DH_METHOD *meth);
 171 DH_METHOD *DH_get_default_method(void);
 172 DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth);
 173 DH *DH_new_method(DH_METHOD *meth);
 174
 175 DH *    DH_new(void);
 176 void    DH_free(DH *dh);
 177 int     DH_size(DH *dh);
 178 int 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);
 180 int DH_set_ex_data(DH *d, int idx, void *arg);
 181 void *DH_get_ex_data(DH *d, int idx);
 182 DH *    DH_generate_parameters(int prime_len,int generator,
 183                 void (*callback)(int,int,void *),void *cb_arg);
 184 int     DH_check(DH *dh,int *codes);
 185 int     DH_generate_key(DH *dh);
 186 int     DH_compute_key(unsigned char *key,BIGNUM *pub_key,DH *dh);
 187 DH *    d2i_DHparams(DH **a,unsigned char **pp, long length);
 188 int     i2d_DHparams(DH *a,unsigned char **pp);
 189 #ifndef NO_FP_API
 190 int     DHparams_print_fp(FILE *fp, DH *x);
 191 #endif
 192 #ifndef NO_BIO
 193 int     DHparams_print(BIO *bp, DH *x);
 194 #else
 195 int     DHparams_print(char *bp, DH *x);
 196 #endif
 197 void    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