1 /* $OpenBSD: dsa_locl.h,v 1.6 2022/07/04 12:22:32 tb Exp $ */ 2 /* ==================================================================== 3 * Copyright (c) 2007 The OpenSSL Project. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * 3. All advertising materials mentioning features or use of this 18 * software must display the following acknowledgment: 19 * "This product includes software developed by the OpenSSL Project 20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 21 * 22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 23 * endorse or promote products derived from this software without 24 * prior written permission. For written permission, please contact 25 * openssl-core@openssl.org. 26 * 27 * 5. Products derived from this software may not be called "OpenSSL" 28 * nor may "OpenSSL" appear in their names without prior written 29 * permission of the OpenSSL Project. 30 * 31 * 6. Redistributions of any form whatsoever must retain the following 32 * acknowledgment: 33 * "This product includes software developed by the OpenSSL Project 34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 47 * OF THE POSSIBILITY OF SUCH DAMAGE. 48 * ==================================================================== 49 * 50 * This product includes cryptographic software written by Eric Young 51 * (eay@cryptsoft.com). This product includes software written by Tim 52 * Hudson (tjh@cryptsoft.com). 53 * 54 */ 55 56 #include <openssl/dsa.h> 57 58 __BEGIN_HIDDEN_DECLS 59 60 struct DSA_SIG_st { 61 BIGNUM *r; 62 BIGNUM *s; 63 } /* DSA_SIG */; 64 65 struct dsa_method { 66 char *name; 67 DSA_SIG *(*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa); 68 int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, 69 BIGNUM **rp); 70 int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len, 71 DSA_SIG *sig, DSA *dsa); 72 int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, 73 BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, 74 BN_MONT_CTX *in_mont); 75 int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, 76 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); /* Can be null */ 77 int (*init)(DSA *dsa); 78 int (*finish)(DSA *dsa); 79 int flags; 80 char *app_data; 81 /* If this is non-NULL, it is used to generate DSA parameters */ 82 int (*dsa_paramgen)(DSA *dsa, int bits, const unsigned char *seed, 83 int seed_len, int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); 84 /* If this is non-NULL, it is used to generate DSA keys */ 85 int (*dsa_keygen)(DSA *dsa); 86 } /* DSA_METHOD */; 87 88 struct dsa_st { 89 /* This first variable is used to pick up errors where 90 * a DSA is passed instead of of a EVP_PKEY */ 91 int pad; 92 long version; 93 BIGNUM *p; 94 BIGNUM *q; /* == 20 */ 95 BIGNUM *g; 96 97 BIGNUM *pub_key; /* y public key */ 98 BIGNUM *priv_key; /* x private key */ 99 100 BIGNUM *kinv; /* Signing pre-calc */ 101 BIGNUM *r; /* Signing pre-calc */ 102 103 int flags; 104 /* Normally used to cache montgomery values */ 105 BN_MONT_CTX *method_mont_p; 106 int references; 107 CRYPTO_EX_DATA ex_data; 108 const DSA_METHOD *meth; 109 /* functional reference if 'meth' is ENGINE-provided */ 110 ENGINE *engine; 111 } /* DSA */; 112 113 int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits, 114 const EVP_MD *evpmd, const unsigned char *seed_in, size_t seed_len, 115 unsigned char *seed_out, 116 int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); 117 118 __END_HIDDEN_DECLS 119