1 /* $OpenBSD: dhtest.c,v 1.6 2021/11/18 15:07:28 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 /* Until the key-gen callbacks are modified to use newer prototypes, we allow 60 * deprecated functions for openssl-internal code */ 61 #ifdef OPENSSL_NO_DEPRECATED 62 #undef OPENSSL_NO_DEPRECATED 63 #endif 64 65 #include <err.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 70 #include <openssl/crypto.h> 71 #include <openssl/bio.h> 72 #include <openssl/bn.h> 73 #include <openssl/err.h> 74 75 #include <openssl/dh.h> 76 77 static int 78 cb(int p, int n, BN_GENCB *arg) 79 { 80 char c = '*'; 81 82 if (p == 0) 83 c = '.'; 84 if (p == 1) 85 c = '+'; 86 if (p == 2) 87 c = '*'; 88 if (p == 3) 89 c = '\n'; 90 BIO_write(BN_GENCB_get_arg(arg), &c, 1); 91 (void)BIO_flush(BN_GENCB_get_arg(arg)); 92 return 1; 93 } 94 95 int 96 main(int argc, char *argv[]) 97 { 98 BN_GENCB *_cb; 99 DH *a; 100 char buf[12]; 101 unsigned char *abuf=NULL; 102 int i, alen, aout; 103 BIO *out; 104 int ret = 1; 105 106 if ((out = BIO_new(BIO_s_file())) == NULL) 107 err(1, "BIO_new"); 108 BIO_set_fp(out, stdout, BIO_NOCLOSE); 109 110 if ((_cb = BN_GENCB_new()) == NULL) 111 err(1, "BN_GENCB_new"); 112 113 BN_GENCB_set(_cb, &cb, out); 114 if ((a = DH_new()) == NULL) 115 goto err; 116 117 if (!DH_generate_parameters_ex(a, 64, DH_GENERATOR_5, _cb)) 118 goto err; 119 120 if (!DH_check(a, &i)) 121 goto err; 122 if (i & DH_CHECK_P_NOT_PRIME) 123 BIO_puts(out, "p value is not prime\n"); 124 if (i & DH_CHECK_P_NOT_SAFE_PRIME) 125 BIO_puts(out, "p value is not a safe prime\n"); 126 if (i & DH_UNABLE_TO_CHECK_GENERATOR) 127 BIO_puts(out, "unable to check the generator value\n"); 128 if (i & DH_NOT_SUITABLE_GENERATOR) 129 BIO_puts(out, "the g value is not a generator\n"); 130 131 BIO_puts(out, "\np ="); 132 BN_print(out, a->p); 133 BIO_puts(out, "\ng ="); 134 BN_print(out, a->g); 135 BIO_puts(out, "\n"); 136 137 if (!DH_generate_key(a)) 138 goto err; 139 BIO_puts(out, "pri 1="); 140 BN_print(out, a->priv_key); 141 BIO_puts(out, "\npub 1="); 142 BN_print(out, a->pub_key); 143 BIO_puts(out, "\n"); 144 145 alen = DH_size(a); 146 if ((abuf = malloc(alen)) == NULL) 147 err(1, "malloc"); 148 aout = DH_compute_key(abuf, a->pub_key, a); 149 150 BIO_puts(out, "key1 ="); 151 for (i=0; i<aout; i++) { 152 snprintf(buf, sizeof buf, "%02X", abuf[i]); 153 BIO_puts(out, buf); 154 } 155 BIO_puts(out, "\n"); 156 157 if (aout < 4) { 158 fprintf(stderr, "Error in DH routines\n"); 159 goto err; 160 } 161 162 ret = 0; 163 err: 164 ERR_print_errors_fp(stderr); 165 166 free(abuf); 167 if (a != NULL) 168 DH_free(a); 169 BIO_free(out); 170 BN_GENCB_free(_cb); 171 172 return (ret); 173 } 174