1/*
2* Copyright (c) 2007, Novell, Inc.
3* Author: Matthias Koenig <mkoenig@suse.de>
4*
5* All rights reserved.
6*
7* Redistribution and use in source and binary forms, with or without
8* modification, are permitted provided that the following conditions are met:
9*
10* * Redistributions of source code must retain the above copyright notice, this
11*   list of conditions and the following disclaimer.
12*
13* * Redistributions in binary form must reproduce the above copyright notice,
14*   this list of conditions and the following disclaimer in the documentation
15*   and/or other materials provided with the distribution.
16*
17* * Neither the name of the Novell nor the names of its contributors may be used
18*   to endorse or promote products derived from this software without specific
19*   prior written permission.
20*
21* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31* POSSIBILITY OF SUCH DAMAGE.
32*/
33
34/* openssl diffie-hellman test code
35 * works with openssl-0.9.8e
36 * primes with 3072 and 6144 bits as specified in RFC3526
37 * fail since openssl-0.9.8f
38 */
39
40#include <config.h>
41
42#include <stdio.h>
43#include <ctype.h>
44
45#include <roken.h>
46#include <getarg.h>
47
48#include <dh.h>
49#include <evp.h>
50
51/*
52 *
53 */
54
55static char *id_string;
56static int verbose;
57static int version_flag;
58static int help_flag;
59
60static struct getargs args[] = {
61    { "id",	0,		arg_string,	&id_string,
62      "type of ENGINE", NULL },
63    { "verbose",	0,	arg_flag,	&verbose,
64      "verbose output from tests", NULL },
65    { "version",	0,	arg_flag,	&version_flag,
66      "print version", NULL },
67    { "help",		0,	arg_flag,	&help_flag,
68      NULL, 	NULL }
69};
70
71/*
72 *
73 */
74
75#define OAKLEY_PRIME_MODP768					\
76    "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"	\
77    "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"	\
78    "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"	\
79    "E485B576 625E7EC6 F44C42E9 A63A3620 FFFFFFFF FFFFFFFF"
80
81#define OAKLEY_PRIME_MODP1024					\
82    "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"	\
83    "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"	\
84    "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"	\
85    "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"	\
86    "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE65381"	\
87    "FFFFFFFF FFFFFFFF"
88
89#define OAKLEY_PRIME_MODP1536					\
90    "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"	\
91    "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"	\
92    "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"	\
93    "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"	\
94    "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"	\
95    "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"	\
96    "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"	\
97    "670C354E 4ABC9804 F1746C08 CA237327 FFFFFFFF FFFFFFFF"
98
99/* RFC 3526 */
100#define OAKLEY_PRIME_MODP2048					\
101    "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"	\
102    "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"	\
103    "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"	\
104    "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"	\
105    "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"	\
106    "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"	\
107    "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"	\
108    "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"	\
109    "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"	\
110    "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"	\
111    "15728E5A 8AACAA68 FFFFFFFF FFFFFFFF"
112
113#define OAKLEY_PRIME_MODP3072					\
114    "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"	\
115    "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"	\
116    "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"	\
117    "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"	\
118    "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"	\
119    "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"	\
120    "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"	\
121    "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"	\
122    "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"	\
123    "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"	\
124    "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"	\
125    "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"	\
126    "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"	\
127    "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"	\
128    "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"	\
129    "43DB5BFC E0FD108E 4B82D120 A93AD2CA FFFFFFFF FFFFFFFF"
130
131#define OAKLEY_PRIME_MODP4096					\
132    "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"	\
133    "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"	\
134    "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"	\
135    "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"	\
136    "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"	\
137    "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"	\
138    "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"	\
139    "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"	\
140    "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"	\
141    "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"	\
142    "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"	\
143    "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"	\
144    "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"	\
145    "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"	\
146    "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"	\
147    "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"	\
148    "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"	\
149    "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"	\
150    "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"	\
151    "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"	\
152    "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34063199"	\
153    "FFFFFFFF FFFFFFFF"
154
155#define OAKLEY_PRIME_MODP6144					\
156    "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"	\
157    "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"	\
158    "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"	\
159    "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"	\
160    "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"	\
161    "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"	\
162    "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"	\
163    "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"	\
164    "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"	\
165    "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"	\
166    "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"	\
167    "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"	\
168    "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"	\
169    "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"	\
170    "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"	\
171    "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"	\
172    "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"	\
173    "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"	\
174    "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"	\
175    "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"	\
176    "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492"	\
177    "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD"	\
178    "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831"	\
179    "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B"	\
180    "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF"	\
181    "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6"	\
182    "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3"	\
183    "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA"	\
184    "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328"	\
185    "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C"	\
186    "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE"	\
187    "12BF2D5B 0B7474D6 E694F91E 6DCC4024 FFFFFFFF FFFFFFFF"
188
189#define OAKLEY_PRIME_MODP8192					\
190    "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1"	\
191    "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD"	\
192    "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245"	\
193    "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED"	\
194    "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D"	\
195    "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F"	\
196    "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"	\
197    "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B"	\
198    "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9"	\
199    "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510"	\
200    "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64"	\
201    "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7"	\
202    "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B"	\
203    "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"	\
204    "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31"	\
205    "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7"	\
206    "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA"	\
207    "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6"	\
208    "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED"	\
209    "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9"	\
210    "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492"	\
211    "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD"	\
212    "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831"	\
213    "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B"	\
214    "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF"	\
215    "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6"	\
216    "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3"	\
217    "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA"	\
218    "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328"	\
219    "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C"	\
220    "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE"	\
221    "12BF2D5B 0B7474D6 E694F91E 6DBE1159 74A3926F 12FEE5E4"	\
222    "38777CB6 A932DF8C D8BEC4D0 73B931BA 3BC832B6 8D9DD300"	\
223    "741FA7BF 8AFC47ED 2576F693 6BA42466 3AAB639C 5AE4F568"	\
224    "3423B474 2BF1C978 238F16CB E39D652D E3FDB8BE FC848AD9"	\
225    "22222E04 A4037C07 13EB57A8 1A23F0C7 3473FC64 6CEA306B"	\
226    "4BCBC886 2F8385DD FA9D4B7F A2C087E8 79683303 ED5BDD3A"	\
227    "062B3CF5 B3A278A6 6D2A13F8 3F44F82D DF310EE0 74AB6A36"	\
228    "4597E899 A0255DC1 64F31CC5 0846851D F9AB4819 5DED7EA1"	\
229    "B1D510BD 7EE74D73 FAF36BC3 1ECFA268 359046F4 EB879F92"	\
230    "4009438B 481C6CD7 889A002E D5EE382B C9190DA6 FC026E47"	\
231    "9558E447 5677E9AA 9E3050E2 765694DF C81F56E8 80B96E71"	\
232    "60C980DD 98EDD3DF FFFFFFFF FFFFFFFF"
233
234struct prime {
235    char *name;
236    char *value;
237} primes[] = {
238    { "modp768", OAKLEY_PRIME_MODP768 },
239    { "modp1024", OAKLEY_PRIME_MODP1024 },
240    { "modp1536", OAKLEY_PRIME_MODP1536 },
241    { "modp2048", OAKLEY_PRIME_MODP2048 },
242    { "modp3072", OAKLEY_PRIME_MODP3072 },
243    { "modp4096", OAKLEY_PRIME_MODP4096 },
244    { "modp6144", OAKLEY_PRIME_MODP6144 },
245    { "modp8192", OAKLEY_PRIME_MODP8192 },
246    { NULL, NULL }
247};
248
249/*
250 * exchange a string based "base" to a value.
251 *
252 */
253static char *
254str2val(const char *str, int base, size_t *len)
255{
256    int f;
257    size_t i;
258    char *dst;
259    char *rp;
260    const char *p;
261    char b[3];
262
263    i = 0;
264    for (p = str; *p != '\0'; p++) {
265	if (isxdigit((int)*p))
266	    i++;
267	else if (isspace((int)*p))
268	    ;
269	else
270	    return NULL;
271    }
272    if (i == 0 || (i % 2) != 0)
273	return NULL;
274    i /= 2;
275
276    if ((dst = malloc(i)) == NULL)
277	return NULL;
278
279    i = 0;
280    f = 0;
281    for (rp = dst, p = str; *p != '\0'; p++) {
282	if (isxdigit((int)*p)) {
283	    if (!f) {
284		b[0] = *p;
285		f = 1;
286	    } else {
287		b[1] = *p;
288		b[2] = '\0';
289		*rp++ = (char)strtol(b, NULL, base);
290		i++;
291		f = 0;
292	    }
293	}
294    }
295
296    *len = i;
297
298    return(dst);
299}
300
301static void set_prime(BIGNUM *p, char *str)
302{
303    size_t len = 0;
304    unsigned char *prime;
305
306    prime = (unsigned char *)str2val(str, 16, &len);
307    if (prime == NULL)
308	errx(1, "failed to parse %s", str);
309    BN_bin2bn(prime, len, p);
310}
311
312static void set_generator(BIGNUM *g)
313{
314    BN_set_word(g, 2);
315}
316
317static void print_secret(unsigned char *sec, size_t len)
318{
319    size_t i;
320
321    for (i = 0; i < len; ++i)
322	printf("%x", sec[i]);
323
324    printf("\n");
325}
326
327static int check_prime(ENGINE *engine, struct prime *pr)
328{
329    DH *dh1, *dh2;
330    BIGNUM *p, *g;
331    unsigned char *sec1, *sec2;
332    size_t size;
333    int ret;
334
335    if (verbose)
336	printf("Testing %s\n", pr->name);
337
338    p = BN_new();
339    g = BN_new();
340    dh1 = DH_new_method(engine);
341    dh2 = DH_new_method(engine);
342
343    /* 1. set shared parameter */
344    set_prime(p, pr->value);
345    set_generator(g);
346    dh1->p = BN_dup(p);
347    dh1->g = BN_dup(g);
348    dh2->p = BN_dup(p);
349    dh2->g = BN_dup(g);
350
351    /* 2. set keys */
352    ret = DH_generate_key(dh1);
353    if (ret == 0) {
354	fprintf(stderr, "DH_generate_key\n");
355	exit(EXIT_FAILURE);
356    }
357    ret = DH_generate_key(dh2);
358    if (ret == 0) {
359	fprintf(stderr, "DH_generate_key\n");
360	exit(EXIT_FAILURE);
361    }
362
363    /* 3. compute shared secret */
364    size = DH_size(dh1);
365    if (size != DH_size(dh2)) {
366	fprintf(stderr, "size does not match!\n");
367	exit(EXIT_FAILURE);
368    }
369    sec1 = malloc(size);
370    sec2 = malloc(size);
371    if (!sec1 || !sec2) {
372	perror("malloc");
373	exit(EXIT_FAILURE);
374    }
375    ret = DH_compute_key(sec1, dh2->pub_key, dh1);
376    if (ret <= 0) {
377	fprintf(stderr, "DH_compute_key");
378	exit(EXIT_FAILURE);
379    }
380    if (ret > size) {
381	fprintf(stderr, "DH_compute_key res too large");
382	exit(EXIT_FAILURE);
383    }
384
385    ret2 = DH_compute_key(sec2, dh1->pub_key, dh2);
386    if (ret2 <= 0) {
387	fprintf(stderr, "DH_compute_key");
388	exit(EXIT_FAILURE);
389    }
390    if (ret2 > size) {
391	fprintf(stderr, "DH_compute_key res too large");
392	exit(EXIT_FAILURE);
393    }
394
395    if (ret != res2) {
396	fprintf(stderr, "DH_compute_key have two difference sizes");
397	exit(EXIT_FAILURE);
398    }
399
400    /* 4. check that length make sense */
401    if (ret < size / 2) {
402	fprintf(stderr, "DH_compute_key computed a key way too small");
403	exit(EXIT_FAILURE);
404    }
405
406    /* 5. compare shared secret */
407    if (verbose) {
408	printf("shared secret 1\n");
409	print_secret(sec1, ret);
410	printf("shared secret 2\n");
411	print_secret(sec2, ret);
412    }
413
414    if (memcmp(sec1, sec2, ret) == 0)
415	ret = 1;
416    else
417	ret = 0;
418
419    free(sec2);
420    free(sec1);
421    DH_free(dh2);
422    DH_free(dh1);
423    BN_free(g);
424    BN_free(p);
425
426    return ret;
427}
428
429/*
430 *
431 */
432
433static void
434usage (int ret)
435{
436    arg_printusage (args,
437		    sizeof(args)/sizeof(*args),
438		    NULL,
439		    "");
440    exit (ret);
441}
442
443int
444main(int argc, char **argv)
445{
446    ENGINE *engine = NULL;
447    int idx = 0;
448
449    setprogname(argv[0]);
450
451    if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &idx))
452	usage(1);
453
454    if (help_flag)
455	usage(0);
456
457    if(version_flag){
458	print_version(NULL);
459	exit(0);
460    }
461
462    argc -= idx;
463    argv += idx;
464
465    OpenSSL_add_all_algorithms();
466#ifdef OPENSSL
467    ENGINE_load_openssl();
468#endif
469    ENGINE_load_builtin_engines();
470
471    if (id_string) {
472	engine = ENGINE_by_id(id_string);
473	if (engine == NULL)
474	    engine = ENGINE_by_dso(id_string, id_string);
475    } else {
476	engine = ENGINE_by_id("builtin");
477    }
478    if (engine == NULL)
479	errx(1, "ENGINE_by_dso failed");
480
481    printf("dh %s\n", ENGINE_get_DH(engine)->name);
482
483    {
484	struct prime *p = primes;
485
486	for (; p->name; ++p)
487	    if (check_prime(engine, p))
488		printf("%s: shared secret OK\n", p->name);
489	    else
490		printf("%s: shared secret FAILURE\n", p->name);
491
492	return 0;
493    }
494
495    return 0;
496}
497