crypto/dsa/dsa.h

   1 /* crypto/dsa/dsa.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 /*
  60  * The DSS routines are based on patches supplied by
  61  * Steven Schoch <schoch@sheba.arc.nasa.gov>.  He basically did the
  62  * work and I have just tweaked them a little to fit into my
  63  * stylistic vision for SSLeay :-) */
  64
  65 #ifndef HEADER_DSA_H
  66 #define HEADER_DSA_H
  67
  68 #include <openssl/e_os2.h>
  69
  70 #ifdef OPENSSL_NO_DSA
  71 #error DSA is disabled.
  72 #endif
  73
  74 #ifndef OPENSSL_NO_BIO
  75 #include <openssl/bio.h>
  76 #endif
  77 #include <openssl/bn.h>
  78 #include <openssl/crypto.h>
  79 #include <openssl/ossl_typ.h>
  80 #ifndef OPENSSL_NO_DH
  81 # include <openssl/dh.h>
  82 #endif
  83
  84 #define DSA_FLAG_CACHE_MONT_P   0x01
  85
  86 #ifdef  __cplusplus
  87 extern "C" {
  88 #endif
  89
  90 typedef struct dsa_st DSA;
  91
  92 typedef struct DSA_SIG_st
  93         {
  94         BIGNUM *r;
  95         BIGNUM *s;
  96         } DSA_SIG;
  97
  98 typedef struct dsa_method {
  99         const char *name;
 100         DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa);
 101         int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
 102                                                                 BIGNUM **rp);
 103         int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len,
 104                                                         DSA_SIG *sig, DSA *dsa);
 105         int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,
 106                         BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx,
 107                         BN_MONT_CTX *in_mont);
 108         int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
 109                                 const BIGNUM *m, BN_CTX *ctx,
 110                                 BN_MONT_CTX *m_ctx); /* Can be null */
 111         int (*init)(DSA *dsa);
 112         int (*finish)(DSA *dsa);
 113         int flags;
 114         char *app_data;
 115         /* If this is non-NULL, it is used to generate DSA parameters */
 116         int (*dsa_paramgen)(DSA *dsa, int bits,
 117                         unsigned char *seed, int seed_len,
 118                         int *counter_ret, unsigned long *h_ret,
 119                         BN_GENCB *cb);
 120         /* If this is non-NULL, it is used to generate DSA keys */
 121         int (*dsa_keygen)(DSA *dsa);
 122 } DSA_METHOD;
 123
 124 struct dsa_st
 125         {
 126         /* This first variable is used to pick up errors where
 127          * a DSA is passed instead of of a EVP_PKEY */
 128         int pad;
 129         long version;
 130         int write_params;
 131         BIGNUM *p;
 132         BIGNUM *q;      /* == 20 */
 133         BIGNUM *g;
 134
 135         BIGNUM *pub_key;  /* y public key */
 136         BIGNUM *priv_key; /* x private key */
 137
 138         BIGNUM *kinv;   /* Signing pre-calc */
 139         BIGNUM *r;      /* Signing pre-calc */
 140
 141         int flags;
 142         /* Normally used to cache montgomery values */
 143         char *method_mont_p;
 144         int references;
 145         CRYPTO_EX_DATA ex_data;
 146         const DSA_METHOD *meth;
 147         /* functional reference if 'meth' is ENGINE-provided */
 148         ENGINE *engine;
 149         };
 150
 151 #define DSAparams_dup(x) (DSA *)ASN1_dup((int (*)())i2d_DSAparams, \
 152                 (char *(*)())d2i_DSAparams,(char *)(x))
 153 #define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \
 154                 (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x))
 155 #define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \
 156                 (unsigned char *)(x))
 157 #define d2i_DSAparams_bio(bp,x) (DSA *)ASN1_d2i_bio((char *(*)())DSA_new, \
 158                 (char *(*)())d2i_DSAparams,(bp),(unsigned char **)(x))
 159 #define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio(i2d_DSAparams,(bp), \
 160                 (unsigned char *)(x))
 161
 162
 163 DSA_SIG * DSA_SIG_new(void);
 164 void    DSA_SIG_free(DSA_SIG *a);
 165 int     i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
 166 DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
 167
 168 DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa);
 169 int     DSA_do_verify(const unsigned char *dgst,int dgst_len,
 170                       DSA_SIG *sig,DSA *dsa);
 171
 172 const DSA_METHOD *DSA_OpenSSL(void);
 173
 174 void    DSA_set_default_method(const DSA_METHOD *);
 175 const DSA_METHOD *DSA_get_default_method(void);
 176 int     DSA_set_method(DSA *dsa, const DSA_METHOD *);
 177
 178 DSA *   DSA_new(void);
 179 DSA *   DSA_new_method(ENGINE *engine);
 180 void    DSA_free (DSA *r);
 181 /* "up" the DSA object's reference count */
 182 int     DSA_up_ref(DSA *r);
 183 int     DSA_size(const DSA *);
 184         /* next 4 return -1 on error */
 185 int     DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp);
 186 int     DSA_sign(int type,const unsigned char *dgst,int dlen,
 187                 unsigned char *sig, unsigned int *siglen, DSA *dsa);
 188 int     DSA_verify(int type,const unsigned char *dgst,int dgst_len,
 189                 const unsigned char *sigbuf, int siglen, DSA *dsa);
 190 int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 191              CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
 192 int DSA_set_ex_data(DSA *d, int idx, void *arg);
 193 void *DSA_get_ex_data(DSA *d, int idx);
 194
 195 DSA *   d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
 196 DSA *   d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
 197 DSA *   d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
 198
 199 /* Deprecated version */
 200 #ifndef OPENSSL_NO_DEPRECATED
 201 DSA *   DSA_generate_parameters(int bits,
 202                 unsigned char *seed,int seed_len,
 203                 int *counter_ret, unsigned long *h_ret,void
 204                 (*callback)(int, int, void *),void *cb_arg);
 205 #endif /* !defined(OPENSSL_NO_DEPRECATED) */
 206
 207 /* New version */
 208 int     DSA_generate_parameters_ex(DSA *dsa, int bits,
 209                 unsigned char *seed,int seed_len,
 210                 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb);
 211
 212 int     DSA_generate_key(DSA *a);
 213 int     i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
 214 int     i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
 215 int     i2d_DSAparams(const DSA *a,unsigned char **pp);
 216
 217 #ifndef OPENSSL_NO_BIO
 218 int     DSAparams_print(BIO *bp, const DSA *x);
 219 int     DSA_print(BIO *bp, const DSA *x, int off);
 220 #endif
 221 #ifndef OPENSSL_NO_FP_API
 222 int     DSAparams_print_fp(FILE *fp, const DSA *x);
 223 int     DSA_print_fp(FILE *bp, const DSA *x, int off);
 224 #endif
 225
 226 #define DSS_prime_checks 50
 227 /* Primality test according to FIPS PUB 186[-1], Appendix 2.1:
 228  * 50 rounds of Rabin-Miller */
 229 #define DSA_is_prime(n, callback, cb_arg) \
 230         BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg)
 231
 232 #ifndef OPENSSL_NO_DH
 233 /* Convert DSA structure (key or just parameters) into DH structure
 234  * (be careful to avoid small subgroup attacks when using this!) */
 235 DH *DSA_dup_DH(const DSA *r);
 236 #endif
 237
 238 /* BEGIN ERROR CODES */
 239 /* The following lines are auto generated by the script mkerr.pl. Any changes
 240  * made after this point may be overwritten when the script is next run.
 241  */
 242 void ERR_load_DSA_strings(void);
 243
 244 /* Error codes for the DSA functions. */
 245
 246 /* Function codes. */
 247 #define DSA_F_D2I_DSA_SIG                                110
 248 #define DSA_F_DSAPARAMS_PRINT                            100
 249 #define DSA_F_DSAPARAMS_PRINT_FP                         101
 250 #define DSA_F_DSA_DO_SIGN                                112
 251 #define DSA_F_DSA_DO_VERIFY                              113
 252 #define DSA_F_DSA_NEW_METHOD                             103
 253 #define DSA_F_DSA_PRINT                                  104
 254 #define DSA_F_DSA_PRINT_FP                               105
 255 #define DSA_F_DSA_SIGN                                   106
 256 #define DSA_F_DSA_SIGN_SETUP                             107
 257 #define DSA_F_DSA_SIG_NEW                                109
 258 #define DSA_F_DSA_VERIFY                                 108
 259 #define DSA_F_I2D_DSA_SIG                                111
 260 #define DSA_F_SIG_CB                                     114
 261
 262 /* Reason codes. */
 263 #define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE                100
 264 #define DSA_R_MISSING_PARAMETERS                         101
 265
 266 #ifdef  __cplusplus
 267 }
 268 #endif
 269 #endif