1 /* $OpenBSD: dhtest.c,v 1.14 2023/08/20 22:21:00 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 #include <err.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 64 #include <openssl/crypto.h> 65 #include <openssl/bio.h> 66 #include <openssl/bn.h> 67 #include <openssl/err.h> 68 69 #include <openssl/dh.h> 70 71 static int 72 cb(int p, int n, BN_GENCB *arg) 73 { 74 char c = '*'; 75 76 if (p == 0) 77 c = '.'; 78 if (p == 1) 79 c = '+'; 80 if (p == 2) 81 c = '*'; 82 if (p == 3) 83 c = '\n'; 84 printf("%c", c); 85 fflush(stdout); 86 return 1; 87 } 88 89 int 90 main(int argc, char *argv[]) 91 { 92 BN_GENCB *_cb; 93 DH *dh = NULL; 94 unsigned char *buf = NULL; 95 int flags, buf_len, secret_len; 96 int i; 97 int ret = 1; 98 99 if ((_cb = BN_GENCB_new()) == NULL) 100 err(1, "BN_GENCB_new"); 101 102 BN_GENCB_set(_cb, &cb, NULL); 103 if ((dh = DH_new()) == NULL) 104 goto err; 105 106 #ifdef OPENSSL_NO_ENGINE 107 if (DH_get0_engine(dh) != NULL) { 108 fprintf(stderr, "ENGINE was not NULL\n"); 109 goto err; 110 } 111 #endif 112 113 if (!DH_generate_parameters_ex(dh, 64, DH_GENERATOR_5, _cb)) 114 goto err; 115 116 if (!DH_check(dh, &flags)) 117 goto err; 118 if (flags & DH_CHECK_P_NOT_PRIME) 119 printf("p value is not prime\n"); 120 if (flags & DH_CHECK_P_NOT_SAFE_PRIME) 121 printf("p value is not a safe prime\n"); 122 if (flags & DH_UNABLE_TO_CHECK_GENERATOR) 123 printf("unable to check the generator value\n"); 124 if (flags & DH_NOT_SUITABLE_GENERATOR) 125 printf("the g value is not a generator\n"); 126 127 printf("\np = "); 128 if (!BN_print_fp(stdout, DH_get0_p(dh))) 129 goto err; 130 printf("\ng = "); 131 if (!BN_print_fp(stdout, DH_get0_g(dh))) 132 goto err; 133 printf("\n"); 134 135 if (!DH_generate_key(dh)) 136 goto err; 137 printf("pri1 = "); 138 if (!BN_print_fp(stdout, DH_get0_priv_key(dh))) 139 goto err; 140 printf("\npub1 = "); 141 if (!BN_print_fp(stdout, DH_get0_pub_key(dh))) 142 goto err; 143 printf("\n"); 144 145 buf_len = DH_size(dh); 146 if ((buf = malloc(buf_len)) == NULL) 147 err(1, "malloc"); 148 secret_len = DH_compute_key(buf, DH_get0_pub_key(dh), dh); 149 150 printf("key1 = "); 151 for (i = 0; i < secret_len; i++) { 152 printf("%02X", buf[i]); 153 } 154 printf("\n"); 155 156 if (secret_len < 4) { 157 fprintf(stderr, "Error in DH routines\n"); 158 goto err; 159 } 160 161 ret = 0; 162 err: 163 ERR_print_errors_fp(stderr); 164 165 free(buf); 166 DH_free(dh); 167 BN_GENCB_free(_cb); 168 169 return (ret); 170 } 171