diff options
Diffstat (limited to 'ipsec-tools/src/racoon/plainrsa-gen.c')
| -rw-r--r-- | ipsec-tools/src/racoon/plainrsa-gen.c | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/ipsec-tools/src/racoon/plainrsa-gen.c b/ipsec-tools/src/racoon/plainrsa-gen.c new file mode 100644 index 00000000..cad1861b --- /dev/null +++ b/ipsec-tools/src/racoon/plainrsa-gen.c @@ -0,0 +1,307 @@ +/* $NetBSD: plainrsa-gen.c,v 1.6 2011/02/11 10:07:19 tteras 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 <fcntl.h> + +#include <openssl/bio.h> +#include <openssl/bn.h> +#include <openssl/err.h> +#include <openssl/objects.h> +#include <openssl/pem.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, " -i filename Input source for format conversion\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(const 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 +print_rsa_key(FILE *fp, const RSA *key) +{ + vchar_t *pubkey64 = NULL; + + 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 %d bits\n", BN_num_bits(key->n)); + 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 +print_public_rsa_key(FILE *fp, const RSA *key) +{ + vchar_t *pubkey64 = NULL; + + 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); + + vfree(pubkey64); + return 0; +} + +int +convert_rsa_key(FILE *fpout, FILE *fpin) +{ + int ret; + RSA *key = NULL; + + key = PEM_read_RSAPrivateKey(fpin, NULL, NULL, NULL); + if (key) { + ret = print_rsa_key(fpout, key); + RSA_free(key); + + return ret; + } + + rewind(fpin); + + key = PEM_read_RSA_PUBKEY(fpin, NULL, NULL, NULL); + if (key) { + ret = print_public_rsa_key(fpout, key); + RSA_free(key); + + return ret; + } + + /* Implement parsing of input stream containing + * private or public "plainrsa" formatted text. + * Convert the result to PEM formatted output. + * + * This seemingly needs manual use of prsaparse(). + * An expert ought to do this. */ + + fprintf(stderr, "convert_rsa_key: %s\n", "Only conversion from PEM at this time"); + return -1; +} + +int +gen_rsa_key(FILE *fp, size_t bits, unsigned long exp) +{ + int ret; + RSA *key; + + key = RSA_generate_key(bits, exp, NULL, NULL); + if (!key) { + fprintf(stderr, "RSA_generate_key(): %s\n", eay_strerror()); + return -1; + } + + ret = print_rsa_key(fp, key); + RSA_free(key); + + return ret; +} + +int +main (int argc, char *argv[]) +{ + FILE *fp = stdout, *fpin = NULL; + size_t bits = 1024; + unsigned int pubexp = 0x3; + struct stat st; + extern char *optarg; + extern int optind; + int c, fd = -1, fdin = -1; + char *fname = NULL, *finput = NULL; + + while ((c = getopt(argc, argv, "e:b:f:i: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 'i': + finput = optarg; + break; + case 'h': + default: + usage(argv[0]); + } + + if (fname) { + umask(0077); + /* Restrictive access due to private key material. */ + fd = open(fname, O_WRONLY | O_CREAT | O_EXCL | O_NOFOLLOW, S_IRUSR | S_IWUSR); + if (fd < 0) { + if (errno == EEXIST) + fprintf(stderr, "%s: file exists! Please use a different name.\n", fname); + else + fprintf(stderr, "%s: %s\n", fname, strerror(errno)); + exit(1); + } + fp = fdopen(fd, "w"); + if (fp == NULL) { + fprintf(stderr, "%s: %s\n", fname, strerror(errno)); + close(fd); + exit(1); + } + } + + if (finput) { + /* Restrictive access once more. Do not be fooled by a link. */ + fdin = open(finput, O_RDONLY | O_NOFOLLOW); + if (fdin < 0) { + if (errno == ELOOP) + fprintf(stderr, "%s: file is a link. Discarded for security.\n", fname); + if (fp) + fclose(fp); + exit(1); + } + fpin = fdopen(fdin, "r"); + if (fpin == NULL) { + fprintf(stderr, "%s: %s\n", fname, strerror(errno)); + close(fdin); + if (fp) + fclose(fp); + exit(1); + } + + } + + ploginit(); + eay_init(); + + if (fpin) + convert_rsa_key(fp, fpin); + else + gen_rsa_key(fp, bits, pubexp); + + fclose(fp); + if (fpin) + fclose(fpin); + + return 0; +} |