mingw/include/openssl/dh.h

   1 /* crypto/dh/dh.h */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef HEADER_DH_H
  60 #define HEADER_DH_H
  61
  62 #include <openssl/e_os2.h>
  63
  64 #ifdef OPENSSL_NO_DH
  65 #error DH is disabled.
  66 #endif
  67
  68 #ifndef OPENSSL_NO_BIO
  69 #include <openssl/bio.h>
  70 #endif
  71 #include <openssl/ossl_typ.h>
  72 #ifndef OPENSSL_NO_DEPRECATED
  73 #include <openssl/bn.h>
  74 #endif
  75
  76 #ifndef OPENSSL_DH_MAX_MODULUS_BITS
  77 # define OPENSSL_DH_MAX_MODULUS_BITS    10000
  78 #endif
  79
  80 #define OPENSSL_DH_FIPS_MIN_MODULUS_BITS 1024
  81
  82 #define DH_FLAG_CACHE_MONT_P     0x01
  83 #define DH_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DH
  84                                        * implementation now uses constant time
  85                                        * modular exponentiation for secret exponents
  86                                        * by default. This flag causes the
  87                                        * faster variable sliding window method to
  88                                        * be used for all exponents.
  89                                        */
  90
  91 #ifdef  __cplusplus
  92 extern "C" {
  93 #endif
  94
  95 /* Already defined in ossl_typ.h */
  96 /* typedef struct dh_st DH; */
  97 /* typedef struct dh_method DH_METHOD; */
  98
  99 struct dh_method
 100         {
 101         const char *name;
 102         /* Methods here */
 103         int (*generate_key)(DH *dh);
 104         int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh);
 105         int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a,
 106                                 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
 107                                 BN_MONT_CTX *m_ctx); /* Can be null */
 108
 109         int (*init)(DH *dh);
 110         int (*finish)(DH *dh);
 111         int flags;
 112         char *app_data;
 113         /* If this is non-NULL, it will be used to generate parameters */
 114         int (*generate_params)(DH *dh, int prime_len, int generator, BN_GENCB *cb);
 115         };
 116
 117 struct dh_st
 118         {
 119         /* This first argument is used to pick up errors when
 120          * a DH is passed instead of a EVP_PKEY */
 121         int pad;
 122         int version;
 123         BIGNUM *p;
 124         BIGNUM *g;
 125         long length; /* optional */
 126         BIGNUM *pub_key;        /* g^x */
 127         BIGNUM *priv_key;       /* x */
 128
 129         int flags;
 130         BN_MONT_CTX *method_mont_p;
 131         /* Place holders if we want to do X9.42 DH */
 132         BIGNUM *q;
 133         BIGNUM *j;
 134         unsigned char *seed;
 135         int seedlen;
 136         BIGNUM *counter;
 137
 138         int references;
 139         CRYPTO_EX_DATA ex_data;
 140         const DH_METHOD *meth;
 141         ENGINE *engine;
 142         };
 143
 144 #define DH_GENERATOR_2          2
 145 /* #define DH_GENERATOR_3       3 */
 146 #define DH_GENERATOR_5          5
 147
 148 /* DH_check error codes */
 149 #define DH_CHECK_P_NOT_PRIME            0x01
 150 #define DH_CHECK_P_NOT_SAFE_PRIME       0x02
 151 #define DH_UNABLE_TO_CHECK_GENERATOR    0x04
 152 #define DH_NOT_SUITABLE_GENERATOR       0x08
 153
 154 /* DH_check_pub_key error codes */
 155 #define DH_CHECK_PUBKEY_TOO_SMALL       0x01
 156 #define DH_CHECK_PUBKEY_TOO_LARGE       0x02
 157
 158 /* primes p where (p-1)/2 is prime too are called "safe"; we define
 159    this for backward compatibility: */
 160 #define DH_CHECK_P_NOT_STRONG_PRIME     DH_CHECK_P_NOT_SAFE_PRIME
 161
 162 #define DHparams_dup(x) ASN1_dup_of_const(DH,i2d_DHparams,d2i_DHparams,x)
 163 #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
 164                 (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
 165 #define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
 166                 (unsigned char *)(x))
 167 #define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x)
 168 #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x)
 169
 170 const DH_METHOD *DH_OpenSSL(void);
 171
 172 #ifdef OPENSSL_FIPS
 173 DH *    FIPS_dh_new(void);
 174 void    FIPS_dh_free(DH *dh);
 175 #endif
 176
 177 void DH_set_default_method(const DH_METHOD *meth);
 178 const DH_METHOD *DH_get_default_method(void);
 179 int DH_set_method(DH *dh, const DH_METHOD *meth);
 180 DH *DH_new_method(ENGINE *engine);
 181
 182 DH *    DH_new(void);
 183 void    DH_free(DH *dh);
 184 int     DH_up_ref(DH *dh);
 185 int     DH_size(const DH *dh);
 186 int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 187              CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
 188 int DH_set_ex_data(DH *d, int idx, void *arg);
 189 void *DH_get_ex_data(DH *d, int idx);
 190
 191 /* Deprecated version */
 192 #ifndef OPENSSL_NO_DEPRECATED
 193 DH *    DH_generate_parameters(int prime_len,int generator,
 194                 void (*callback)(int,int,void *),void *cb_arg);
 195 #endif /* !defined(OPENSSL_NO_DEPRECATED) */
 196
 197 /* New version */
 198 int     DH_generate_parameters_ex(DH *dh, int prime_len,int generator, BN_GENCB *cb);
 199
 200 int     DH_check(const DH *dh,int *codes);
 201 int     DH_check_pub_key(const DH *dh,const BIGNUM *pub_key, int *codes);
 202 int     DH_generate_key(DH *dh);
 203 int     DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh);
 204 DH *    d2i_DHparams(DH **a,const unsigned char **pp, long length);
 205 int     i2d_DHparams(const DH *a,unsigned char **pp);
 206 #ifndef OPENSSL_NO_FP_API
 207 int     DHparams_print_fp(FILE *fp, const DH *x);
 208 #endif
 209 #ifndef OPENSSL_NO_BIO
 210 int     DHparams_print(BIO *bp, const DH *x);
 211 #else
 212 int     DHparams_print(char *bp, const DH *x);
 213 #endif
 214
 215 /* BEGIN ERROR CODES */
 216 /* The following lines are auto generated by the script mkerr.pl. Any changes
 217  * made after this point may be overwritten when the script is next run.
 218  */
 219 void ERR_load_DH_strings(void);
 220
 221 /* Error codes for the DH functions. */
 222
 223 /* Function codes. */
 224 #define DH_F_COMPUTE_KEY                                 102
 225 #define DH_F_DHPARAMS_PRINT                              100
 226 #define DH_F_DHPARAMS_PRINT_FP                           101
 227 #define DH_F_DH_BUILTIN_GENPARAMS                        106
 228 #define DH_F_DH_COMPUTE_KEY                              107
 229 #define DH_F_DH_GENERATE_KEY                             108
 230 #define DH_F_DH_GENERATE_PARAMETERS                      109
 231 #define DH_F_DH_NEW_METHOD                               105
 232 #define DH_F_GENERATE_KEY                                103
 233 #define DH_F_GENERATE_PARAMETERS                         104
 234
 235 /* Reason codes. */
 236 #define DH_R_BAD_GENERATOR                               101
 237 #define DH_R_INVALID_PUBKEY                              102
 238 #define DH_R_KEY_SIZE_TOO_SMALL                          104
 239 #define DH_R_MODULUS_TOO_LARGE                           103
 240 #define DH_R_NO_PRIVATE_VALUE                            100
 241
 242 #ifdef  __cplusplus
 243 }
 244 #endif
 245 #endif