1 /* $Id: plainrsa-gen.c,v 1.4 2004/09/13 14:24:08 ludvigm Exp $ */
3 * Copyright (C) 2004 SuSE Linux AG, Nuernberg, Germany.
4 * Contributed by: Michal Ludvig <mludvig@suse.cz>, SUSE Labs
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 /* This file contains a generator for FreeS/WAN-style ipsec.secrets RSA keys. */
40 #include <sys/types.h>
42 #include <sys/socket.h>
45 #include <openssl/bio.h>
46 #include <openssl/bn.h>
47 #include <openssl/err.h>
48 #include <openssl/objects.h>
49 #include <openssl/rsa.h>
50 #include <openssl/evp.h>
51 #ifdef HAVE_OPENSSL_ENGINE_H
52 #include <openssl/engine.h>
58 #include "crypto_openssl.h"
60 #include "../../package_version.h"
65 fprintf(stderr, "Plain RSA key generator, part of %s\n", TOP_PACKAGE_STRING);
66 fprintf(stderr, "By Michal Ludvig (http://www.logix.cz/michal)\n");
67 fprintf(stderr, "\n");
68 fprintf(stderr, "Usage: %s [options]\n", argv0);
69 fprintf(stderr, "\n");
70 fprintf(stderr, " -b bits Generate <bits> long RSA key (default=1024)\n");
71 fprintf(stderr, " -e pubexp Public exponent to use (default=0x3)\n");
72 fprintf(stderr, " -f filename Filename to store the key to (default=stdout)\n");
73 fprintf(stderr, " -h Help\n");
74 fprintf(stderr, "\n");
75 fprintf(stderr, "Report bugs to <ipsec-tools-devel@lists.sourceforge.net>\n");
80 * See RFC 2065, section 3.5 for details about the output format.
83 mix_b64_pubkey(RSA *key)
89 binlen = 1 + BN_num_bytes(key->e) + BN_num_bytes(key->n);
90 binbuf = malloc(binlen);
91 memset(binbuf, 0, binlen);
92 binbuf[0] = BN_bn2bin(key->e, &binbuf[1]);
93 ret = BN_bn2bin(key->n, &binbuf[binbuf[0] + 1]);
94 if (1 + binbuf[0] + ret != binlen) {
95 plog(LLV_ERROR, LOCATION, NULL,
96 "Pubkey generation failed. This is really strange...\n");
100 return base64_encode(binbuf, binlen);
104 lowercase(char *input)
108 if (*ptr >= 'A' && *ptr <= 'F')
117 gen_rsa_key(FILE *fp, size_t bits, unsigned long exp)
120 vchar_t *pubkey64 = NULL;
122 key = RSA_generate_key(bits, exp, NULL, NULL);
124 fprintf(stderr, "RSA_generate_key(): %s\n", eay_strerror());
128 pubkey64 = mix_b64_pubkey(key);
130 fprintf(stderr, "mix_b64_pubkey(): %s\n", eay_strerror());
134 fprintf(fp, "# : PUB 0s%s\n", pubkey64->v);
135 fprintf(fp, ": RSA\t{\n");
136 fprintf(fp, "\t# RSA %zu bits\n", bits);
137 fprintf(fp, "\t# pubkey=0s%s\n", pubkey64->v);
138 fprintf(fp, "\tModulus: 0x%s\n", lowercase(BN_bn2hex(key->n)));
139 fprintf(fp, "\tPublicExponent: 0x%s\n", lowercase(BN_bn2hex(key->e)));
140 fprintf(fp, "\tPrivateExponent: 0x%s\n", lowercase(BN_bn2hex(key->d)));
141 fprintf(fp, "\tPrime1: 0x%s\n", lowercase(BN_bn2hex(key->p)));
142 fprintf(fp, "\tPrime2: 0x%s\n", lowercase(BN_bn2hex(key->q)));
143 fprintf(fp, "\tExponent1: 0x%s\n", lowercase(BN_bn2hex(key->dmp1)));
144 fprintf(fp, "\tExponent2: 0x%s\n", lowercase(BN_bn2hex(key->dmq1)));
145 fprintf(fp, "\tCoefficient: 0x%s\n", lowercase(BN_bn2hex(key->iqmp)));
154 main (int argc, char *argv[])
158 unsigned int pubexp = 0x3;
165 while ((c = getopt(argc, argv, "e:b:f:h")) != -1)
168 if (strncmp(optarg, "0x", 2) == 0)
169 sscanf(optarg, "0x%x", &pubexp);
171 pubexp = atoi(optarg);
185 if (stat(fname, &st) >= 0) {
186 fprintf(stderr, "%s: file exists! Please use a different name.\n", fname);
191 fp = fopen(fname, "w");
193 fprintf(stderr, "%s: %s\n", fname, strerror(errno));
201 gen_rsa_key(fp, bits, pubexp);