crypto/dsa/dsa_local.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 #include "internal/ffc.h"
  13
  14 struct dsa_st {
  15     /*
  16      * This first variable is used to pick up errors where a DSA is passed
  17      * instead of of a EVP_PKEY
  18      */
  19     int pad;
  20     int32_t version;
  21     FFC_PARAMS params;
  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     CRYPTO_REF_COUNT references;
  28 #ifndef FIPS_MODE
  29     CRYPTO_EX_DATA ex_data;
  30 #endif
  31     const DSA_METHOD *meth;
  32     /* functional reference if 'meth' is ENGINE-provided */
  33     ENGINE *engine;
  34     CRYPTO_RWLOCK *lock;
  35
  36     /* Provider data */
  37     size_t dirty_cnt; /* If any key material changes, increment this */
  38 };
  39
  40 struct DSA_SIG_st {
  41     BIGNUM *r;
  42     BIGNUM *s;
  43 };
  44
  45 struct dsa_method {
  46     char *name;
  47     DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa);
  48     int (*dsa_sign_setup) (DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
  49                            BIGNUM **rp);
  50     int (*dsa_do_verify) (const unsigned char *dgst, int dgst_len,
  51                           DSA_SIG *sig, DSA *dsa);
  52     int (*dsa_mod_exp) (DSA *dsa, BIGNUM *rr, const BIGNUM *a1,
  53                         const BIGNUM *p1, const BIGNUM *a2, const BIGNUM *p2,
  54                         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont);
  55     /* Can be null */
  56     int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  57                        const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
  58     int (*init) (DSA *dsa);
  59     int (*finish) (DSA *dsa);
  60     int flags;
  61     void *app_data;
  62     /* If this is non-NULL, it is used to generate DSA parameters */
  63     int (*dsa_paramgen) (DSA *dsa, int bits,
  64                          const unsigned char *seed, int seed_len,
  65                          int *counter_ret, unsigned long *h_ret,
  66                          BN_GENCB *cb);
  67     /* If this is non-NULL, it is used to generate DSA keys */
  68     int (*dsa_keygen) (DSA *dsa);
  69 };
  70
  71 DSA_SIG *dsa_do_sign_int(OPENSSL_CTX *libctx, const unsigned char *dgst,
  72                          int dlen, DSA *dsa);