crypto/dsa/dsa_locl.h

   1 /*
   2  * Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 #include "internal/refcount.h"
  12
  13 struct dsa_st {
  14     /*
  15      * This first variable is used to pick up errors where a DSA is passed
  16      * instead of of a EVP_PKEY
  17      */
  18     int pad;
  19     int32_t version;
  20     BIGNUM *p;
  21     BIGNUM *q;                  /* == 20 */
  22     BIGNUM *g;
  23     BIGNUM *pub_key;            /* y public key */
  24     BIGNUM *priv_key;           /* x private key */
  25     int flags;
  26     /* Normally used to cache montgomery values */
  27     BN_MONT_CTX *method_mont_p;
  28     CRYPTO_REF_COUNT references;
  29     CRYPTO_EX_DATA ex_data;
  30     const DSA_METHOD *meth;
  31     /* functional reference if 'meth' is ENGINE-provided */
  32     ENGINE *engine;
  33     CRYPTO_RWLOCK *lock;
  34
  35     /* Provider data */
  36     size_t dirty_cnt; /* If any key material changes, increment this */
  37 };
  38
  39 struct DSA_SIG_st {
  40     BIGNUM *r;
  41     BIGNUM *s;
  42 };
  43
  44 struct dsa_method {
  45     char *name;
  46     DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa);
  47     int (*dsa_sign_setup) (DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
  48                            BIGNUM **rp);
  49     int (*dsa_do_verify) (const unsigned char *dgst, int dgst_len,
  50                           DSA_SIG *sig, DSA *dsa);
  51     int (*dsa_mod_exp) (DSA *dsa, BIGNUM *rr, const BIGNUM *a1,
  52                         const BIGNUM *p1, const BIGNUM *a2, const BIGNUM *p2,
  53                         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont);
  54     /* Can be null */
  55     int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  56                        const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
  57     int (*init) (DSA *dsa);
  58     int (*finish) (DSA *dsa);
  59     int flags;
  60     void *app_data;
  61     /* If this is non-NULL, it is used to generate DSA parameters */
  62     int (*dsa_paramgen) (DSA *dsa, int bits,
  63                          const unsigned char *seed, int seed_len,
  64                          int *counter_ret, unsigned long *h_ret,
  65                          BN_GENCB *cb);
  66     /* If this is non-NULL, it is used to generate DSA keys */
  67     int (*dsa_keygen) (DSA *dsa);
  68 };
  69
  70 int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
  71                          const EVP_MD *evpmd, const unsigned char *seed_in,
  72                          size_t seed_len, unsigned char *seed_out,
  73                          int *counter_ret, unsigned long *h_ret,
  74                          BN_GENCB *cb);
  75
  76 int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
  77                           const EVP_MD *evpmd, const unsigned char *seed_in,
  78                           size_t seed_len, int idx, unsigned char *seed_out,
  79                           int *counter_ret, unsigned long *h_ret,
  80                           BN_GENCB *cb);