Annotation of src/usr.bin/openssl/prime.c, Revision 1.14
1.14 ! joshua 1: /* $OpenBSD: prime.c,v 1.13 2019/07/14 03:30:46 guenther Exp $ */
1.1 jsing 2: /* ====================================================================
3: * Copyright (c) 2004 The OpenSSL Project. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: *
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: *
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in
14: * the documentation and/or other materials provided with the
15: * distribution.
16: *
17: * 3. All advertising materials mentioning features or use of this
18: * software must display the following acknowledgment:
19: * "This product includes software developed by the OpenSSL Project
20: * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21: *
22: * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23: * endorse or promote products derived from this software without
24: * prior written permission. For written permission, please contact
25: * openssl-core@openssl.org.
26: *
27: * 5. Products derived from this software may not be called "OpenSSL"
28: * nor may "OpenSSL" appear in their names without prior written
29: * permission of the OpenSSL Project.
30: *
31: * 6. Redistributions of any form whatsoever must retain the following
32: * acknowledgment:
33: * "This product includes software developed by the OpenSSL Project
34: * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35: *
36: * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37: * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47: * OF THE POSSIBILITY OF SUCH DAMAGE.
48: *
49: */
50:
51: #include <string.h>
52: #include <limits.h>
53:
54: #include "apps.h"
55:
56: #include <openssl/bn.h>
1.6 doug 57: #include <openssl/err.h>
1.1 jsing 58:
1.2 jsing 59: struct {
60: int bits;
61: int checks;
62: int generate;
63: int hex;
64: int safe;
65: } prime_config;
66:
1.13 guenther 67: static const struct option prime_options[] = {
1.2 jsing 68: {
69: .name = "bits",
70: .argname = "n",
71: .desc = "Number of bits in the generated prime number",
72: .type = OPTION_ARG_INT,
73: .opt.value = &prime_config.bits,
74: },
75: {
76: .name = "checks",
77: .argname = "n",
78: .desc = "Miller-Rabin probablistic primality test iterations",
79: .type = OPTION_ARG_INT,
80: .opt.value = &prime_config.checks,
81: },
82: {
83: .name = "generate",
84: .desc = "Generate a pseudo-random prime number",
85: .type = OPTION_FLAG,
86: .opt.flag = &prime_config.generate,
87: },
88: {
89: .name = "hex",
90: .desc = "Hexadecimal prime numbers",
91: .type = OPTION_FLAG,
92: .opt.flag = &prime_config.hex,
93: },
94: {
95: .name = "safe",
96: .desc = "Generate only \"safe\" prime numbers",
97: .type = OPTION_FLAG,
98: .opt.flag = &prime_config.safe,
99: },
1.3 bcook 100: {NULL},
1.2 jsing 101: };
102:
103: static void
104: prime_usage()
105: {
106: fprintf(stderr,
107: "usage: prime [-bits n] [-checks n] [-generate] [-hex] [-safe] "
108: "p\n");
109: options_usage(prime_options);
110: }
1.1 jsing 111:
112: int
113: prime_main(int argc, char **argv)
114: {
115: BIGNUM *bn = NULL;
1.2 jsing 116: char *prime = NULL;
1.1 jsing 117: BIO *bio_out;
1.2 jsing 118: char *s;
1.12 tb 119: int is_prime, ret = 1;
1.9 doug 120:
1.14 ! joshua 121: if (pledge("stdio rpath", NULL) == -1) {
! 122: perror("pledge");
! 123: exit(1);
1.9 doug 124: }
1.2 jsing 125:
126: memset(&prime_config, 0, sizeof(prime_config));
127:
128: /* Default iterations for Miller-Rabin probabilistic primality test. */
129: prime_config.checks = 20;
1.1 jsing 130:
1.4 jsing 131: if (options_parse(argc, argv, prime_options, &prime, NULL) != 0) {
1.2 jsing 132: prime_usage();
133: return (1);
1.1 jsing 134: }
135:
1.2 jsing 136: if (prime == NULL && prime_config.generate == 0) {
137: BIO_printf(bio_err, "No prime specified.\n");
138: prime_usage();
139: return (1);
1.1 jsing 140: }
1.2 jsing 141:
1.5 lteo 142: if ((bio_out = BIO_new(BIO_s_file())) == NULL) {
143: ERR_print_errors(bio_err);
144: return (1);
1.1 jsing 145: }
1.5 lteo 146: BIO_set_fp(bio_out, stdout, BIO_NOCLOSE);
1.1 jsing 147:
1.2 jsing 148: if (prime_config.generate != 0) {
149: if (prime_config.bits == 0) {
150: BIO_printf(bio_err, "Specify the number of bits.\n");
1.5 lteo 151: goto end;
152: }
153: bn = BN_new();
154: if (!bn) {
155: BIO_printf(bio_err, "Out of memory.\n");
156: goto end;
157: }
158: if (!BN_generate_prime_ex(bn, prime_config.bits,
159: prime_config.safe, NULL, NULL, NULL)) {
160: BIO_printf(bio_err, "Prime generation error.\n");
161: goto end;
1.1 jsing 162: }
1.2 jsing 163: s = prime_config.hex ? BN_bn2hex(bn) : BN_bn2dec(bn);
1.5 lteo 164: if (s == NULL) {
165: BIO_printf(bio_err, "Out of memory.\n");
166: goto end;
167: }
1.1 jsing 168: BIO_printf(bio_out, "%s\n", s);
169: free(s);
170: } else {
1.5 lteo 171: if (prime_config.hex) {
172: if (!BN_hex2bn(&bn, prime)) {
173: BIO_printf(bio_err, "%s is an invalid hex "
174: "value.\n", prime);
175: goto end;
176: }
177: } else {
178: if (!BN_dec2bn(&bn, prime)) {
179: BIO_printf(bio_err, "%s is an invalid decimal "
180: "value.\n", prime);
181: goto end;
182: }
183: }
1.1 jsing 184:
1.12 tb 185: is_prime = BN_is_prime_ex(bn, prime_config.checks, NULL, NULL);
186: if (is_prime < 0) {
187: BIO_printf(bio_err, "BN_is_prime_ex failed.\n");
188: goto end;
189: }
1.8 lteo 190: BIO_printf(bio_out, "%s is %sprime\n", prime,
1.12 tb 191: is_prime == 1 ? "" : "not ");
1.1 jsing 192: }
193:
1.5 lteo 194: ret = 0;
195:
1.11 jsing 196: end:
1.1 jsing 197: BN_free(bn);
198: BIO_free_all(bio_out);
199:
1.5 lteo 200: return (ret);
1.1 jsing 201: }
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