| /* $NetBSD: plainrsa-gen.c,v 1.4 2006/09/09 16:22:10 manu Exp $ */ |
| |
| /* Id: plainrsa-gen.c,v 1.6 2005/04/21 09:08:40 monas Exp */ |
| /* |
| * Copyright (C) 2004 SuSE Linux AG, Nuernberg, Germany. |
| * Contributed by: Michal Ludvig <mludvig@suse.cz>, SUSE Labs |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the project nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| /* This file contains a generator for FreeS/WAN-style ipsec.secrets RSA keys. */ |
| |
| #include "config.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/socket.h> |
| #include <unistd.h> |
| |
| #include <openssl/bio.h> |
| #include <openssl/bn.h> |
| #include <openssl/err.h> |
| #include <openssl/objects.h> |
| #include <openssl/rsa.h> |
| #include <openssl/evp.h> |
| #ifdef HAVE_OPENSSL_ENGINE_H |
| #include <openssl/engine.h> |
| #endif |
| |
| #include "misc.h" |
| #include "vmbuf.h" |
| #include "plog.h" |
| #include "crypto_openssl.h" |
| |
| #include "package_version.h" |
| |
| void |
| usage (char *argv0) |
| { |
| fprintf(stderr, "Plain RSA key generator, part of %s\n", TOP_PACKAGE_STRING); |
| fprintf(stderr, "By Michal Ludvig (http://www.logix.cz/michal)\n"); |
| fprintf(stderr, "\n"); |
| fprintf(stderr, "Usage: %s [options]\n", argv0); |
| fprintf(stderr, "\n"); |
| fprintf(stderr, " -b bits Generate <bits> long RSA key (default=1024)\n"); |
| fprintf(stderr, " -e pubexp Public exponent to use (default=0x3)\n"); |
| fprintf(stderr, " -f filename Filename to store the key to (default=stdout)\n"); |
| fprintf(stderr, " -h Help\n"); |
| fprintf(stderr, "\n"); |
| fprintf(stderr, "Report bugs to <ipsec-tools-devel@lists.sourceforge.net>\n"); |
| exit(1); |
| } |
| |
| /* |
| * See RFC 2065, section 3.5 for details about the output format. |
| */ |
| vchar_t * |
| mix_b64_pubkey(RSA *key) |
| { |
| char *binbuf; |
| long binlen, ret; |
| vchar_t *res; |
| |
| binlen = 1 + BN_num_bytes(key->e) + BN_num_bytes(key->n); |
| binbuf = malloc(binlen); |
| memset(binbuf, 0, binlen); |
| binbuf[0] = BN_bn2bin(key->e, (unsigned char *) &binbuf[1]); |
| ret = BN_bn2bin(key->n, (unsigned char *) (&binbuf[binbuf[0] + 1])); |
| if (1 + binbuf[0] + ret != binlen) { |
| plog(LLV_ERROR, LOCATION, NULL, |
| "Pubkey generation failed. This is really strange...\n"); |
| return NULL; |
| } |
| |
| return base64_encode(binbuf, binlen); |
| } |
| |
| char * |
| lowercase(char *input) |
| { |
| char *ptr = input; |
| while (*ptr) { |
| if (*ptr >= 'A' && *ptr <= 'F') |
| *ptr -= 'A' - 'a'; |
| *ptr++; |
| } |
| |
| return input; |
| } |
| |
| int |
| gen_rsa_key(FILE *fp, size_t bits, unsigned long exp) |
| { |
| RSA *key; |
| vchar_t *pubkey64 = NULL; |
| |
| key = RSA_generate_key(bits, exp, NULL, NULL); |
| if (!key) { |
| fprintf(stderr, "RSA_generate_key(): %s\n", eay_strerror()); |
| return -1; |
| } |
| |
| pubkey64 = mix_b64_pubkey(key); |
| if (!pubkey64) { |
| fprintf(stderr, "mix_b64_pubkey(): %s\n", eay_strerror()); |
| return -1; |
| } |
| |
| fprintf(fp, "# : PUB 0s%s\n", pubkey64->v); |
| fprintf(fp, ": RSA\t{\n"); |
| fprintf(fp, "\t# RSA %zu bits\n", bits); |
| fprintf(fp, "\t# pubkey=0s%s\n", pubkey64->v); |
| fprintf(fp, "\tModulus: 0x%s\n", lowercase(BN_bn2hex(key->n))); |
| fprintf(fp, "\tPublicExponent: 0x%s\n", lowercase(BN_bn2hex(key->e))); |
| fprintf(fp, "\tPrivateExponent: 0x%s\n", lowercase(BN_bn2hex(key->d))); |
| fprintf(fp, "\tPrime1: 0x%s\n", lowercase(BN_bn2hex(key->p))); |
| fprintf(fp, "\tPrime2: 0x%s\n", lowercase(BN_bn2hex(key->q))); |
| fprintf(fp, "\tExponent1: 0x%s\n", lowercase(BN_bn2hex(key->dmp1))); |
| fprintf(fp, "\tExponent2: 0x%s\n", lowercase(BN_bn2hex(key->dmq1))); |
| fprintf(fp, "\tCoefficient: 0x%s\n", lowercase(BN_bn2hex(key->iqmp))); |
| fprintf(fp, " }\n"); |
| |
| vfree(pubkey64); |
| |
| return 0; |
| } |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| FILE *fp = stdout; |
| size_t bits = 1024; |
| unsigned int pubexp = 0x3; |
| struct stat st; |
| extern char *optarg; |
| extern int optind; |
| int c; |
| char *fname = NULL; |
| |
| while ((c = getopt(argc, argv, "e:b:f:h")) != -1) |
| switch (c) { |
| case 'e': |
| if (strncmp(optarg, "0x", 2) == 0) |
| sscanf(optarg, "0x%x", &pubexp); |
| else |
| pubexp = atoi(optarg); |
| break; |
| case 'b': |
| bits = atoi(optarg); |
| break; |
| case 'f': |
| fname = optarg; |
| break; |
| case 'h': |
| default: |
| usage(argv[0]); |
| } |
| |
| if (fname) { |
| if (stat(fname, &st) >= 0) { |
| fprintf(stderr, "%s: file exists! Please use a different name.\n", fname); |
| exit(1); |
| } |
| |
| umask(0077); |
| fp = fopen(fname, "w"); |
| if (fp == NULL) { |
| fprintf(stderr, "%s: %s\n", fname, strerror(errno)); |
| exit(1); |
| } |
| } |
| |
| ploginit(); |
| eay_init(); |
| |
| gen_rsa_key(fp, bits, pubexp); |
| |
| fclose(fp); |
| |
| return 0; |
| } |