245 lines
7.8 KiB
C
245 lines
7.8 KiB
C
/* apps/gendh.c */
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/* obsoleted by dhparam.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>
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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_DH
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# include <stdio.h>
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# include <string.h>
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# include <sys/types.h>
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# include <sys/stat.h>
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# include "apps.h"
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# include <openssl/bio.h>
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# include <openssl/rand.h>
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# include <openssl/err.h>
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# include <openssl/bn.h>
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# include <openssl/dh.h>
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# include <openssl/x509.h>
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# include <openssl/pem.h>
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# define DEFBITS 2048
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# undef PROG
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# define PROG gendh_main
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static int MS_CALLBACK dh_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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BN_GENCB cb;
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DH *dh = NULL;
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int ret = 1, num = DEFBITS;
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int g = 2;
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char *outfile = NULL;
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char *inrand = NULL;
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char *engine = NULL;
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BIO *out = NULL;
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apps_startup();
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BN_GENCB_set(&cb, dh_cb, bio_err);
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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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argv++;
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argc--;
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for (;;) {
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if (argc <= 0)
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break;
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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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} else if (strcmp(*argv, "-2") == 0)
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g = 2;
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/*- else if (strcmp(*argv,"-3") == 0)
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g=3; */
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else if (strcmp(*argv, "-5") == 0)
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g = 5;
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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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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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} else
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break;
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argv++;
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argc--;
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}
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if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
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bad:
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BIO_printf(bio_err, "usage: gendh [args] [numbits]\n");
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BIO_printf(bio_err, " -out file - output the key to 'file\n");
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BIO_printf(bio_err, " -2 - use 2 as the generator value\n");
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/*
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* BIO_printf(bio_err," -3 - use 3 as the generator value\n");
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*/
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BIO_printf(bio_err, " -5 - use 5 as the generator value\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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BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
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LIST_SEPARATOR_CHAR);
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BIO_printf(bio_err,
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" - load the file (or the files in the directory) into\n");
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BIO_printf(bio_err, " the random number generator\n");
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goto end;
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}
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setup_engine(bio_err, engine, 0);
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out = BIO_new(BIO_s_file());
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if (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 (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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if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) {
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BIO_printf(bio_err,
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"warning, not much extra random data, consider using the -rand option\n");
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}
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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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BIO_printf(bio_err,
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"Generating DH parameters, %d bit long safe prime, generator %d\n",
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num, g);
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BIO_printf(bio_err, "This is going to take a long time\n");
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if (((dh = DH_new()) == NULL)
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|| !DH_generate_parameters_ex(dh, num, g, &cb))
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goto end;
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app_RAND_write_file(NULL, bio_err);
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if (!PEM_write_bio_DHparams(out, dh))
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goto end;
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ret = 0;
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end:
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if (ret != 0)
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ERR_print_errors(bio_err);
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if (out != NULL)
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BIO_free_all(out);
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if (dh != NULL)
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DH_free(dh);
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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 dh_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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return 1;
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}
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#else /* !OPENSSL_NO_DH */
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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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