dhtest.c revision 296465 
1/* crypto/dh/dhtest.c */
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/*
60 * Until the key-gen callbacks are modified to use newer prototypes, we allow
61 * deprecated functions for openssl-internal code
62 */
63#ifdef OPENSSL_NO_DEPRECATED
64# undef OPENSSL_NO_DEPRECATED
65#endif
66
67#include <stdio.h>
68#include <stdlib.h>
69#include <string.h>
70
71#include "../e_os.h"
72
73#include <openssl/crypto.h>
74#include <openssl/bio.h>
75#include <openssl/bn.h>
76#include <openssl/rand.h>
77#include <openssl/err.h>
78
79#ifdef OPENSSL_NO_DH
80int main(int argc, char *argv[])
81{
82    printf("No DH support\n");
83    return (0);
84}
85#else
86# include <openssl/dh.h>
87
88# ifdef OPENSSL_SYS_WIN16
89#  define MS_CALLBACK     _far _loadds
90# else
91#  define MS_CALLBACK
92# endif
93
94static int MS_CALLBACK cb(int p, int n, BN_GENCB *arg);
95
96static const char rnd_seed[] =
97    "string to make the random number generator think it has entropy";
98
99int main(int argc, char *argv[])
100{
101    BN_GENCB _cb;
102    DH *a;
103    DH *b = NULL;
104    char buf[12];
105    unsigned char *abuf = NULL, *bbuf = NULL;
106    int i, alen, blen, aout, bout, ret = 1;
107    BIO *out;
108
109    CRYPTO_malloc_debug_init();
110    CRYPTO_dbg_set_options(V_CRYPTO_MDEBUG_ALL);
111    CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
112
113# ifdef OPENSSL_SYS_WIN32
114    CRYPTO_malloc_init();
115# endif
116
117    RAND_seed(rnd_seed, sizeof rnd_seed);
118
119    out = BIO_new(BIO_s_file());
120    if (out == NULL)
121        EXIT(1);
122    BIO_set_fp(out, stdout, BIO_NOCLOSE);
123
124    BN_GENCB_set(&_cb, &cb, out);
125    if (((a = DH_new()) == NULL) || !DH_generate_parameters_ex(a, 64,
126                                                               DH_GENERATOR_5,
127                                                               &_cb))
128        goto err;
129
130    if (!DH_check(a, &i))
131        goto err;
132    if (i & DH_CHECK_P_NOT_PRIME)
133        BIO_puts(out, "p value is not prime\n");
134    if (i & DH_CHECK_P_NOT_SAFE_PRIME)
135        BIO_puts(out, "p value is not a safe prime\n");
136    if (i & DH_UNABLE_TO_CHECK_GENERATOR)
137        BIO_puts(out, "unable to check the generator value\n");
138    if (i & DH_NOT_SUITABLE_GENERATOR)
139        BIO_puts(out, "the g value is not a generator\n");
140
141    BIO_puts(out, "\np    =");
142    BN_print(out, a->p);
143    BIO_puts(out, "\ng    =");
144    BN_print(out, a->g);
145    BIO_puts(out, "\n");
146
147    b = DH_new();
148    if (b == NULL)
149        goto err;
150
151    b->p = BN_dup(a->p);
152    b->g = BN_dup(a->g);
153    if ((b->p == NULL) || (b->g == NULL))
154        goto err;
155
156    /* Set a to run with normal modexp and b to use constant time */
157    a->flags &= ~DH_FLAG_NO_EXP_CONSTTIME;
158    b->flags |= DH_FLAG_NO_EXP_CONSTTIME;
159
160    if (!DH_generate_key(a))
161        goto err;
162    BIO_puts(out, "pri 1=");
163    BN_print(out, a->priv_key);
164    BIO_puts(out, "\npub 1=");
165    BN_print(out, a->pub_key);
166    BIO_puts(out, "\n");
167
168    if (!DH_generate_key(b))
169        goto err;
170    BIO_puts(out, "pri 2=");
171    BN_print(out, b->priv_key);
172    BIO_puts(out, "\npub 2=");
173    BN_print(out, b->pub_key);
174    BIO_puts(out, "\n");
175
176    alen = DH_size(a);
177    abuf = (unsigned char *)OPENSSL_malloc(alen);
178    aout = DH_compute_key(abuf, b->pub_key, a);
179
180    BIO_puts(out, "key1 =");
181    for (i = 0; i < aout; i++) {
182        sprintf(buf, "%02X", abuf[i]);
183        BIO_puts(out, buf);
184    }
185    BIO_puts(out, "\n");
186
187    blen = DH_size(b);
188    bbuf = (unsigned char *)OPENSSL_malloc(blen);
189    bout = DH_compute_key(bbuf, a->pub_key, b);
190
191    BIO_puts(out, "key2 =");
192    for (i = 0; i < bout; i++) {
193        sprintf(buf, "%02X", bbuf[i]);
194        BIO_puts(out, buf);
195    }
196    BIO_puts(out, "\n");
197    if ((aout < 4) || (bout != aout) || (memcmp(abuf, bbuf, aout) != 0)) {
198        fprintf(stderr, "Error in DH routines\n");
199        ret = 1;
200    } else
201        ret = 0;
202 err:
203    ERR_print_errors_fp(stderr);
204
205    if (abuf != NULL)
206        OPENSSL_free(abuf);
207    if (bbuf != NULL)
208        OPENSSL_free(bbuf);
209    if (b != NULL)
210        DH_free(b);
211    if (a != NULL)
212        DH_free(a);
213    BIO_free(out);
214# ifdef OPENSSL_SYS_NETWARE
215    if (ret)
216        printf("ERROR: %d\n", ret);
217# endif
218    EXIT(ret);
219    return (ret);
220}
221
222static int MS_CALLBACK cb(int p, int n, BN_GENCB *arg)
223{
224    char c = '*';
225
226    if (p == 0)
227        c = '.';
228    if (p == 1)
229        c = '+';
230    if (p == 2)
231        c = '*';
232    if (p == 3)
233        c = '\n';
234    BIO_write(arg->arg, &c, 1);
235    (void)BIO_flush(arg->arg);
236# ifdef LINT
237    p = n;
238# endif
239    return 1;
240}
241#endif
242