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 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_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 41 struct DSA_SIG_st { 42 BIGNUM *r; 43 BIGNUM *s; 44 }; 45 46 struct 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 72 DSA_SIG *ossl_dsa_do_sign_int(const unsigned char *dgst, int dlen, DSA *dsa); 73