1 /* $OpenBSD: dh_local.h,v 1.3 2022/01/14 08:25:44 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #ifndef HEADER_DH_LOCAL_H 60 #define HEADER_DH_LOCAL_H 61 62 __BEGIN_HIDDEN_DECLS 63 64 struct dh_method { 65 const char *name; 66 /* Methods here */ 67 int (*generate_key)(DH *dh); 68 int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh); 69 int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a, 70 const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); 71 int (*init)(DH *dh); 72 int (*finish)(DH *dh); 73 int flags; 74 char *app_data; 75 /* If this is non-NULL, it will be used to generate parameters */ 76 int (*generate_params)(DH *dh, int prime_len, int generator, 77 BN_GENCB *cb); 78 }; 79 80 struct dh_st { 81 /* This first argument is used to pick up errors when 82 * a DH is passed instead of a EVP_PKEY */ 83 int pad; 84 int version; 85 BIGNUM *p; 86 BIGNUM *g; 87 long length; /* optional */ 88 BIGNUM *pub_key; /* g^x */ 89 BIGNUM *priv_key; /* x */ 90 91 int flags; 92 BN_MONT_CTX *method_mont_p; 93 /* Place holders if we want to do X9.42 DH */ 94 BIGNUM *q; 95 BIGNUM *j; 96 unsigned char *seed; 97 int seedlen; 98 BIGNUM *counter; 99 100 int references; 101 CRYPTO_EX_DATA ex_data; 102 const DH_METHOD *meth; 103 ENGINE *engine; 104 }; 105 106 /* 107 * Public API in OpenSSL that we only want to use internally. 108 */ 109 110 int DH_check_params_ex(const DH *dh); 111 int DH_check_params(const DH *dh, int *flags); 112 int DH_check_ex(const DH *dh); 113 int DH_check_pub_key_ex(const DH *dh, const BIGNUM *pub_key); 114 115 __END_HIDDEN_DECLS 116 117 #endif /* !HEADER_DH_LOCAL_H */ 118