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/*
* Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/dsa.h>
#include "internal/refcount.h"
struct dsa_st {
/*
* This first variable is used to pick up errors where a DSA is passed
* instead of of a EVP_PKEY
*/
int pad;
int32_t version;
BIGNUM *p;
BIGNUM *q; /* == 20 */
BIGNUM *g;
BIGNUM *pub_key; /* y public key */
BIGNUM *priv_key; /* x private key */
int flags;
/* Normally used to cache montgomery values */
BN_MONT_CTX *method_mont_p;
CRYPTO_REF_COUNT references;
CRYPTO_EX_DATA ex_data;
const DSA_METHOD *meth;
/* functional reference if 'meth' is ENGINE-provided */
ENGINE *engine;
CRYPTO_RWLOCK *lock;
};
struct DSA_SIG_st {
BIGNUM *r;
BIGNUM *s;
};
struct dsa_method {
char *name;
DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa);
int (*dsa_sign_setup) (DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
BIGNUM **rp);
int (*dsa_do_verify) (const unsigned char *dgst, int dgst_len,
DSA_SIG *sig, DSA *dsa);
int (*dsa_mod_exp) (DSA *dsa, BIGNUM *rr, const BIGNUM *a1,
const BIGNUM *p1, const BIGNUM *a2, const BIGNUM *p2,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont);
/* Can be null */
int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
int (*init) (DSA *dsa);
int (*finish) (DSA *dsa);
int flags;
void *app_data;
/* If this is non-NULL, it is used to generate DSA parameters */
int (*dsa_paramgen) (DSA *dsa, int bits,
const unsigned char *seed, int seed_len,
int *counter_ret, unsigned long *h_ret,
BN_GENCB *cb);
/* If this is non-NULL, it is used to generate DSA keys */
int (*dsa_keygen) (DSA *dsa);
};
int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
const EVP_MD *evpmd, const unsigned char *seed_in,
size_t seed_len, unsigned char *seed_out,
int *counter_ret, unsigned long *h_ret,
BN_GENCB *cb);
int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
const EVP_MD *evpmd, const unsigned char *seed_in,
size_t seed_len, int idx, unsigned char *seed_out,
int *counter_ret, unsigned long *h_ret,
BN_GENCB *cb);
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