crypto/dsa/dsa_locl.h

   1 /*
   2  * Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/dsa.h>
  11
  12 struct dsa_st {
  13     /*
  14      * This first variable is used to pick up errors where a DSA is passed
  15      * instead of of a EVP_PKEY
  16      */
  17     int pad;
  18     long version;
  19     BIGNUM *p;
  20     BIGNUM *q;                  /* == 20 */
  21     BIGNUM *g;
  22     BIGNUM *pub_key;            /* y public key */
  23     BIGNUM *priv_key;           /* x private key */
  24     int flags;
  25     /* Normally used to cache montgomery values */
  26     BN_MONT_CTX *method_mont_p;
  27     int references;
  28     CRYPTO_EX_DATA ex_data;
  29     const DSA_METHOD *meth;
  30     /* functional reference if 'meth' is ENGINE-provided */
  31     ENGINE *engine;
  32     CRYPTO_RWLOCK *lock;
  33 };
  34
  35 struct DSA_SIG_st {
  36     BIGNUM *r;
  37     BIGNUM *s;
  38 };
  39
  40 struct dsa_method {
  41     char *name;
  42     DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa);
  43     int (*dsa_sign_setup) (DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
  44                            BIGNUM **rp);
  45     int (*dsa_do_verify) (const unsigned char *dgst, int dgst_len,
  46                           DSA_SIG *sig, DSA *dsa);
  47     int (*dsa_mod_exp) (DSA *dsa, BIGNUM *rr, const BIGNUM *a1,
  48                         const BIGNUM *p1, const BIGNUM *a2, const BIGNUM *p2,
  49                         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont);
  50     /* Can be null */
  51     int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  52                        const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
  53     int (*init) (DSA *dsa);
  54     int (*finish) (DSA *dsa);
  55     int flags;
  56     void *app_data;
  57     /* If this is non-NULL, it is used to generate DSA parameters */
  58     int (*dsa_paramgen) (DSA *dsa, int bits,
  59                          const unsigned char *seed, int seed_len,
  60                          int *counter_ret, unsigned long *h_ret,
  61                          BN_GENCB *cb);
  62     /* If this is non-NULL, it is used to generate DSA keys */
  63     int (*dsa_keygen) (DSA *dsa);
  64 };
  65
  66 int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
  67                          const EVP_MD *evpmd, const unsigned char *seed_in,
  68                          size_t seed_len, unsigned char *seed_out,
  69                          int *counter_ret, unsigned long *h_ret,
  70                          BN_GENCB *cb);
  71
  72 int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
  73                           const EVP_MD *evpmd, const unsigned char *seed_in,
  74                           size_t seed_len, int idx, unsigned char *seed_out,
  75                           int *counter_ret, unsigned long *h_ret,
  76                           BN_GENCB *cb);