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2017-02-25 23:55:24 +01:00
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openssl-1.0.2f/apps/gendh.c Normal file
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/* apps/gendh.c */
/* obsoleted by dhparam.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* 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 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <openssl/opensslconf.h>
/*
* Until the key-gen callbacks are modified to use newer prototypes, we allow
* deprecated functions for openssl-internal code
*/
#ifdef OPENSSL_NO_DEPRECATED
# undef OPENSSL_NO_DEPRECATED
#endif
#ifndef OPENSSL_NO_DH
# include <stdio.h>
# include <string.h>
# include <sys/types.h>
# include <sys/stat.h>
# include "apps.h"
# include <openssl/bio.h>
# include <openssl/rand.h>
# include <openssl/err.h>
# include <openssl/bn.h>
# include <openssl/dh.h>
# include <openssl/x509.h>
# include <openssl/pem.h>
# define DEFBITS 2048
# undef PROG
# define PROG gendh_main
static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb);
int MAIN(int, char **);
int MAIN(int argc, char **argv)
{
BN_GENCB cb;
DH *dh = NULL;
int ret = 1, num = DEFBITS;
int g = 2;
char *outfile = NULL;
char *inrand = NULL;
# ifndef OPENSSL_NO_ENGINE
char *engine = NULL;
# endif
BIO *out = NULL;
apps_startup();
BN_GENCB_set(&cb, dh_cb, bio_err);
if (bio_err == NULL)
if ((bio_err = BIO_new(BIO_s_file())) != NULL)
BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
if (!load_config(bio_err, NULL))
goto end;
argv++;
argc--;
for (;;) {
if (argc <= 0)
break;
if (strcmp(*argv, "-out") == 0) {
if (--argc < 1)
goto bad;
outfile = *(++argv);
} else if (strcmp(*argv, "-2") == 0)
g = 2;
/*- else if (strcmp(*argv,"-3") == 0)
g=3; */
else if (strcmp(*argv, "-5") == 0)
g = 5;
# ifndef OPENSSL_NO_ENGINE
else if (strcmp(*argv, "-engine") == 0) {
if (--argc < 1)
goto bad;
engine = *(++argv);
}
# endif
else if (strcmp(*argv, "-rand") == 0) {
if (--argc < 1)
goto bad;
inrand = *(++argv);
} else
break;
argv++;
argc--;
}
if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
bad:
BIO_printf(bio_err, "usage: gendh [args] [numbits]\n");
BIO_printf(bio_err, " -out file - output the key to 'file\n");
BIO_printf(bio_err, " -2 - use 2 as the generator value\n");
/*
* BIO_printf(bio_err," -3 - use 3 as the generator value\n");
*/
BIO_printf(bio_err, " -5 - use 5 as the generator value\n");
# ifndef OPENSSL_NO_ENGINE
BIO_printf(bio_err,
" -engine e - use engine e, possibly a hardware device.\n");
# endif
BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
LIST_SEPARATOR_CHAR);
BIO_printf(bio_err,
" - load the file (or the files in the directory) into\n");
BIO_printf(bio_err, " the random number generator\n");
goto end;
}
# ifndef OPENSSL_NO_ENGINE
setup_engine(bio_err, engine, 0);
# endif
out = BIO_new(BIO_s_file());
if (out == NULL) {
ERR_print_errors(bio_err);
goto end;
}
if (outfile == NULL) {
BIO_set_fp(out, stdout, BIO_NOCLOSE);
# ifdef OPENSSL_SYS_VMS
{
BIO *tmpbio = BIO_new(BIO_f_linebuffer());
out = BIO_push(tmpbio, out);
}
# endif
} else {
if (BIO_write_filename(out, outfile) <= 0) {
perror(outfile);
goto end;
}
}
if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) {
BIO_printf(bio_err,
"warning, not much extra random data, consider using the -rand option\n");
}
if (inrand != NULL)
BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
app_RAND_load_files(inrand));
BIO_printf(bio_err,
"Generating DH parameters, %d bit long safe prime, generator %d\n",
num, g);
BIO_printf(bio_err, "This is going to take a long time\n");
if (((dh = DH_new()) == NULL)
|| !DH_generate_parameters_ex(dh, num, g, &cb))
goto end;
app_RAND_write_file(NULL, bio_err);
if (!PEM_write_bio_DHparams(out, dh))
goto end;
ret = 0;
end:
if (ret != 0)
ERR_print_errors(bio_err);
if (out != NULL)
BIO_free_all(out);
if (dh != NULL)
DH_free(dh);
apps_shutdown();
OPENSSL_EXIT(ret);
}
static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb)
{
char c = '*';
if (p == 0)
c = '.';
if (p == 1)
c = '+';
if (p == 2)
c = '*';
if (p == 3)
c = '\n';
BIO_write(cb->arg, &c, 1);
(void)BIO_flush(cb->arg);
# ifdef LINT
p = n;
# endif
return 1;
}
#else /* !OPENSSL_NO_DH */
# if PEDANTIC
static void *dummy = &dummy;
# endif
#endif