471 lines
14 KiB
C
471 lines
14 KiB
C
/* apps/dsaparam.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */
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/*
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* Until the key-gen callbacks are modified to use newer prototypes, we allow
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* deprecated functions for openssl-internal code
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*/
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#ifdef OPENSSL_NO_DEPRECATED
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# undef OPENSSL_NO_DEPRECATED
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#endif
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#ifndef OPENSSL_NO_DSA
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# include <assert.h>
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# include <stdio.h>
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# include <stdlib.h>
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# include <time.h>
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# include <string.h>
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# include "apps.h"
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# include <openssl/bio.h>
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# include <openssl/err.h>
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# include <openssl/bn.h>
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# include <openssl/dsa.h>
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# include <openssl/x509.h>
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# include <openssl/pem.h>
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# undef PROG
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# define PROG dsaparam_main
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/*-
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* -inform arg - input format - default PEM (DER or PEM)
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* -outform arg - output format - default PEM
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* -in arg - input file - default stdin
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* -out arg - output file - default stdout
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* -noout
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* -text
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* -C
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* -noout
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* -genkey
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* #ifdef GENCB_TEST
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* -timebomb n - interrupt keygen after <n> seconds
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* #endif
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*/
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# ifdef GENCB_TEST
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static int stop_keygen_flag = 0;
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static void timebomb_sigalarm(int foo)
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{
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stop_keygen_flag = 1;
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}
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# endif
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static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb);
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int MAIN(int, char **);
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int MAIN(int argc, char **argv)
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{
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DSA *dsa = NULL;
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int i, badops = 0, text = 0;
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BIO *in = NULL, *out = NULL;
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int informat, outformat, noout = 0, C = 0, ret = 1;
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char *infile, *outfile, *prog, *inrand = NULL;
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int numbits = -1, num, genkey = 0;
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int need_rand = 0;
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char *engine = NULL;
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ENGINE *e = NULL;
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# ifdef GENCB_TEST
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int timebomb = 0;
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# endif
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apps_startup();
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if (bio_err == NULL)
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if ((bio_err = BIO_new(BIO_s_file())) != NULL)
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BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
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if (!load_config(bio_err, NULL))
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goto end;
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infile = NULL;
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outfile = NULL;
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informat = FORMAT_PEM;
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outformat = FORMAT_PEM;
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prog = argv[0];
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argc--;
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argv++;
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while (argc >= 1) {
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if (strcmp(*argv, "-inform") == 0) {
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if (--argc < 1)
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goto bad;
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informat = str2fmt(*(++argv));
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} else if (strcmp(*argv, "-outform") == 0) {
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if (--argc < 1)
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goto bad;
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outformat = str2fmt(*(++argv));
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} else if (strcmp(*argv, "-in") == 0) {
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if (--argc < 1)
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goto bad;
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infile = *(++argv);
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} else if (strcmp(*argv, "-out") == 0) {
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if (--argc < 1)
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goto bad;
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outfile = *(++argv);
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}
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# ifndef OPENSSL_NO_ENGINE
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else if (strcmp(*argv, "-engine") == 0) {
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if (--argc < 1)
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goto bad;
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engine = *(++argv);
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}
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# endif
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# ifdef GENCB_TEST
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else if (strcmp(*argv, "-timebomb") == 0) {
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if (--argc < 1)
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goto bad;
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timebomb = atoi(*(++argv));
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}
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# endif
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else if (strcmp(*argv, "-text") == 0)
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text = 1;
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else if (strcmp(*argv, "-C") == 0)
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C = 1;
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else if (strcmp(*argv, "-genkey") == 0) {
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genkey = 1;
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need_rand = 1;
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} else if (strcmp(*argv, "-rand") == 0) {
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if (--argc < 1)
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goto bad;
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inrand = *(++argv);
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need_rand = 1;
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} else if (strcmp(*argv, "-noout") == 0)
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noout = 1;
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else if (sscanf(*argv, "%d", &num) == 1) {
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/* generate a key */
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numbits = num;
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need_rand = 1;
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} else {
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BIO_printf(bio_err, "unknown option %s\n", *argv);
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badops = 1;
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break;
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}
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argc--;
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argv++;
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}
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if (badops) {
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bad:
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BIO_printf(bio_err, "%s [options] [bits] <infile >outfile\n", prog);
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BIO_printf(bio_err, "where options are\n");
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BIO_printf(bio_err, " -inform arg input format - DER or PEM\n");
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BIO_printf(bio_err, " -outform arg output format - DER or PEM\n");
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BIO_printf(bio_err, " -in arg input file\n");
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BIO_printf(bio_err, " -out arg output file\n");
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BIO_printf(bio_err, " -text print as text\n");
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BIO_printf(bio_err, " -C Output C code\n");
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BIO_printf(bio_err, " -noout no output\n");
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BIO_printf(bio_err, " -genkey generate a DSA key\n");
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BIO_printf(bio_err,
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" -rand files to use for random number input\n");
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# ifndef OPENSSL_NO_ENGINE
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BIO_printf(bio_err,
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" -engine e use engine e, possibly a hardware device.\n");
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# endif
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# ifdef GENCB_TEST
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BIO_printf(bio_err,
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" -timebomb n interrupt keygen after <n> seconds\n");
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# endif
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BIO_printf(bio_err,
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" number number of bits to use for generating private key\n");
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goto end;
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}
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ERR_load_crypto_strings();
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in = BIO_new(BIO_s_file());
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out = BIO_new(BIO_s_file());
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if ((in == NULL) || (out == NULL)) {
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ERR_print_errors(bio_err);
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goto end;
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}
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if (infile == NULL)
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BIO_set_fp(in, stdin, BIO_NOCLOSE);
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else {
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if (BIO_read_filename(in, infile) <= 0) {
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perror(infile);
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goto end;
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}
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}
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if (outfile == NULL) {
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BIO_set_fp(out, stdout, BIO_NOCLOSE);
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# ifdef OPENSSL_SYS_VMS
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{
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BIO *tmpbio = BIO_new(BIO_f_linebuffer());
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out = BIO_push(tmpbio, out);
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}
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# endif
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} else {
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if (BIO_write_filename(out, outfile) <= 0) {
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perror(outfile);
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goto end;
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}
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}
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e = setup_engine(bio_err, engine, 0);
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if (need_rand) {
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app_RAND_load_file(NULL, bio_err, (inrand != NULL));
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if (inrand != NULL)
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BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
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app_RAND_load_files(inrand));
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}
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if (numbits > 0) {
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BN_GENCB cb;
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BN_GENCB_set(&cb, dsa_cb, bio_err);
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assert(need_rand);
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dsa = DSA_new();
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if (!dsa) {
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BIO_printf(bio_err, "Error allocating DSA object\n");
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goto end;
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}
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BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
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num);
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BIO_printf(bio_err, "This could take some time\n");
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# ifdef GENCB_TEST
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if (timebomb > 0) {
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struct sigaction act;
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act.sa_handler = timebomb_sigalarm;
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act.sa_flags = 0;
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BIO_printf(bio_err,
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"(though I'll stop it if not done within %d secs)\n",
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timebomb);
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if (sigaction(SIGALRM, &act, NULL) != 0) {
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BIO_printf(bio_err, "Error, couldn't set SIGALRM handler\n");
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goto end;
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}
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alarm(timebomb);
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}
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# endif
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if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, &cb)) {
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# ifdef GENCB_TEST
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if (stop_keygen_flag) {
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BIO_printf(bio_err, "DSA key generation time-stopped\n");
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/* This is an asked-for behaviour! */
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ret = 0;
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goto end;
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}
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# endif
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ERR_print_errors(bio_err);
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BIO_printf(bio_err, "Error, DSA key generation failed\n");
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goto end;
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}
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} else if (informat == FORMAT_ASN1)
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dsa = d2i_DSAparams_bio(in, NULL);
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else if (informat == FORMAT_PEM)
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dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
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else {
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BIO_printf(bio_err, "bad input format specified\n");
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goto end;
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}
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if (dsa == NULL) {
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BIO_printf(bio_err, "unable to load DSA parameters\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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if (text) {
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DSAparams_print(out, dsa);
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}
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if (C) {
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unsigned char *data;
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int l, len, bits_p;
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len = BN_num_bytes(dsa->p);
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bits_p = BN_num_bits(dsa->p);
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data = (unsigned char *)OPENSSL_malloc(len + 20);
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if (data == NULL) {
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perror("OPENSSL_malloc");
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goto end;
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}
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l = BN_bn2bin(dsa->p, data);
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printf("static unsigned char dsa%d_p[]={", bits_p);
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for (i = 0; i < l; i++) {
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if ((i % 12) == 0)
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printf("\n\t");
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printf("0x%02X,", data[i]);
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}
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printf("\n\t};\n");
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l = BN_bn2bin(dsa->q, data);
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printf("static unsigned char dsa%d_q[]={", bits_p);
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for (i = 0; i < l; i++) {
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if ((i % 12) == 0)
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printf("\n\t");
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printf("0x%02X,", data[i]);
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}
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printf("\n\t};\n");
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l = BN_bn2bin(dsa->g, data);
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printf("static unsigned char dsa%d_g[]={", bits_p);
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for (i = 0; i < l; i++) {
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if ((i % 12) == 0)
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printf("\n\t");
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printf("0x%02X,", data[i]);
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}
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printf("\n\t};\n\n");
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printf("DSA *get_dsa%d()\n\t{\n", bits_p);
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printf("\tDSA *dsa;\n\n");
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printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
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printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
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bits_p, bits_p);
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printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
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bits_p, bits_p);
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printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
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bits_p, bits_p);
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printf
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("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
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printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
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printf("\treturn(dsa);\n\t}\n");
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}
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if (outformat == FORMAT_ASN1 && genkey)
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noout = 1;
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if (!noout) {
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if (outformat == FORMAT_ASN1)
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i = i2d_DSAparams_bio(out, dsa);
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else if (outformat == FORMAT_PEM)
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i = PEM_write_bio_DSAparams(out, dsa);
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else {
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BIO_printf(bio_err, "bad output format specified for outfile\n");
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goto end;
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}
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if (!i) {
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BIO_printf(bio_err, "unable to write DSA parameters\n");
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ERR_print_errors(bio_err);
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goto end;
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}
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}
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if (genkey) {
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DSA *dsakey;
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assert(need_rand);
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if ((dsakey = DSAparams_dup(dsa)) == NULL)
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goto end;
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if (!DSA_generate_key(dsakey)) {
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ERR_print_errors(bio_err);
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DSA_free(dsakey);
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goto end;
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}
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if (outformat == FORMAT_ASN1)
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i = i2d_DSAPrivateKey_bio(out, dsakey);
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else if (outformat == FORMAT_PEM)
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i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
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NULL);
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else {
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BIO_printf(bio_err, "bad output format specified for outfile\n");
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DSA_free(dsakey);
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goto end;
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}
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DSA_free(dsakey);
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}
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if (need_rand)
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app_RAND_write_file(NULL, bio_err);
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ret = 0;
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end:
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if (in != NULL)
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BIO_free(in);
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if (out != NULL)
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BIO_free_all(out);
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if (dsa != NULL)
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DSA_free(dsa);
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release_engine(e);
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apps_shutdown();
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OPENSSL_EXIT(ret);
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}
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static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb)
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{
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char c = '*';
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if (p == 0)
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c = '.';
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if (p == 1)
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c = '+';
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if (p == 2)
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c = '*';
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if (p == 3)
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c = '\n';
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BIO_write(cb->arg, &c, 1);
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(void)BIO_flush(cb->arg);
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# ifdef LINT
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p = n;
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# endif
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# ifdef GENCB_TEST
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if (stop_keygen_flag)
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return 0;
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# endif
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return 1;
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}
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#else /* !OPENSSL_NO_DSA */
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# if PEDANTIC
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static void *dummy = &dummy;
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# endif
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#endif
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