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