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
cb(int p,int n,BN_GENCB * arg)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
main(int argc,char * argv[])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