xref: /third_party/openssl/crypto/dsa/dsa_local.h (revision e1051a39) 
1/*
2 * Copyright 2007-2021 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
14struct 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_MODULE
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    OSSL_LIB_CTX *libctx;
36
37    /* Provider data */
38    size_t dirty_cnt; /* If any key material changes, increment this */
39};
40
41struct DSA_SIG_st {
42    BIGNUM *r;
43    BIGNUM *s;
44};
45
46struct dsa_method {
47    char *name;
48    DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa);
49    int (*dsa_sign_setup) (DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
50                           BIGNUM **rp);
51    int (*dsa_do_verify) (const unsigned char *dgst, int dgst_len,
52                          DSA_SIG *sig, DSA *dsa);
53    int (*dsa_mod_exp) (DSA *dsa, BIGNUM *rr, const BIGNUM *a1,
54                        const BIGNUM *p1, const BIGNUM *a2, const BIGNUM *p2,
55                        const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont);
56    /* Can be null */
57    int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
58                       const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
59    int (*init) (DSA *dsa);
60    int (*finish) (DSA *dsa);
61    int flags;
62    void *app_data;
63    /* If this is non-NULL, it is used to generate DSA parameters */
64    int (*dsa_paramgen) (DSA *dsa, int bits,
65                         const unsigned char *seed, int seed_len,
66                         int *counter_ret, unsigned long *h_ret,
67                         BN_GENCB *cb);
68    /* If this is non-NULL, it is used to generate DSA keys */
69    int (*dsa_keygen) (DSA *dsa);
70};
71
72DSA_SIG *ossl_dsa_do_sign_int(const unsigned char *dgst, int dlen, DSA *dsa);
73