1 /* ====================================================================
2 * Copyright (c) 2007 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * openssl-core@openssl.org.
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
49 * This product includes cryptographic software written by Eric Young
50 * (eay@cryptsoft.com). This product includes software written by Tim
51 * Hudson (tjh@cryptsoft.com).
55 #include <openssl/dsa.h>
59 * This first variable is used to pick up errors where a DSA is passed
60 * instead of of a EVP_PKEY
65 BIGNUM *q; /* == 20 */
67 BIGNUM *pub_key; /* y public key */
68 BIGNUM *priv_key; /* x private key */
70 /* Normally used to cache montgomery values */
71 BN_MONT_CTX *method_mont_p;
73 CRYPTO_EX_DATA ex_data;
74 const DSA_METHOD *meth;
75 /* functional reference if 'meth' is ENGINE-provided */
82 DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa);
83 int (*dsa_sign_setup) (DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
85 int (*dsa_do_verify) (const unsigned char *dgst, int dgst_len,
86 DSA_SIG *sig, DSA *dsa);
87 int (*dsa_mod_exp) (DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,
88 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx,
89 BN_MONT_CTX *in_mont);
91 int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
92 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
93 int (*init) (DSA *dsa);
94 int (*finish) (DSA *dsa);
97 /* If this is non-NULL, it is used to generate DSA parameters */
98 int (*dsa_paramgen) (DSA *dsa, int bits,
99 const unsigned char *seed, int seed_len,
100 int *counter_ret, unsigned long *h_ret,
102 /* If this is non-NULL, it is used to generate DSA keys */
103 int (*dsa_keygen) (DSA *dsa);
106 int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
107 const EVP_MD *evpmd, const unsigned char *seed_in,
108 size_t seed_len, unsigned char *seed_out,
109 int *counter_ret, unsigned long *h_ret,
112 int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
113 const EVP_MD *evpmd, const unsigned char *seed_in,
114 size_t seed_len, int idx, unsigned char *seed_out,
115 int *counter_ret, unsigned long *h_ret,