File: [local] / src / usr.bin / openssl / dsaparam.c (download)
Revision 1.7, Sat Oct 17 15:00:11 2015 UTC (8 years, 7 months ago) by doug
Branch: MAIN
CVS Tags: OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9 Changes since 1.6: +4 -2 lines
Exit if a pledge call fails in non-interactive mode.
ok semarie@
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/* $OpenBSD: dsaparam.c,v 1.7 2015/10/17 15:00:11 doug Exp $ */
/* 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> /* for OPENSSL_NO_DSA */
/* 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
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/dsa.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
static struct {
int C;
int genkey;
char *infile;
int informat;
int noout;
char *outfile;
int outformat;
int text;
} dsaparam_config;
static struct option dsaparam_options[] = {
{
.name = "C",
.desc = "Convert DSA parameters into C code",
.type = OPTION_FLAG,
.opt.flag = &dsaparam_config.C,
},
{
.name = "genkey",
.desc = "Generate a DSA key",
.type = OPTION_FLAG,
.opt.flag = &dsaparam_config.genkey,
},
{
.name = "in",
.argname = "file",
.desc = "Input file (default stdin)",
.type = OPTION_ARG,
.opt.arg = &dsaparam_config.infile,
},
{
.name = "inform",
.argname = "format",
.desc = "Input format (DER or PEM (default))",
.type = OPTION_ARG_FORMAT,
.opt.value = &dsaparam_config.informat,
},
{
.name = "noout",
.desc = "No output",
.type = OPTION_FLAG,
.opt.flag = &dsaparam_config.noout,
},
{
.name = "out",
.argname = "file",
.desc = "Output file (default stdout)",
.type = OPTION_ARG,
.opt.arg = &dsaparam_config.outfile,
},
{
.name = "outform",
.argname = "format",
.desc = "Output format (DER or PEM (default))",
.type = OPTION_ARG_FORMAT,
.opt.value = &dsaparam_config.outformat,
},
{
.name = "text",
.desc = "Print as text",
.type = OPTION_FLAG,
.opt.flag = &dsaparam_config.text,
},
{ NULL },
};
static void
dsaparam_usage(void)
{
fprintf(stderr,
"usage: dsaparam [-C] [-genkey] [-in file]\n"
" [-inform format] [-noout] [-out file] [-outform format]\n"
" [-text] [numbits]\n\n");
options_usage(dsaparam_options);
}
static int dsa_cb(int p, int n, BN_GENCB * cb);
int
dsaparam_main(int argc, char **argv)
{
DSA *dsa = NULL;
int i;
BIO *in = NULL, *out = NULL;
int ret = 1;
int numbits = -1;
char *strbits = NULL;
if (single_execution) {
if (pledge("stdio rpath wpath cpath", NULL) == -1) {
perror("pledge");
exit(1);
}
}
memset(&dsaparam_config, 0, sizeof(dsaparam_config));
dsaparam_config.informat = FORMAT_PEM;
dsaparam_config.outformat = FORMAT_PEM;
if (options_parse(argc, argv, dsaparam_options, &strbits, NULL) != 0) {
dsaparam_usage();
goto end;
}
if (strbits != NULL) {
const char *errstr;
numbits = strtonum(strbits, 0, INT_MAX, &errstr);
if (errstr) {
fprintf(stderr, "Invalid number of bits: %s", errstr);
goto end;
}
}
in = BIO_new(BIO_s_file());
out = BIO_new(BIO_s_file());
if (in == NULL || out == NULL) {
ERR_print_errors(bio_err);
goto end;
}
if (dsaparam_config.infile == NULL)
BIO_set_fp(in, stdin, BIO_NOCLOSE);
else {
if (BIO_read_filename(in, dsaparam_config.infile) <= 0) {
perror(dsaparam_config.infile);
goto end;
}
}
if (dsaparam_config.outfile == NULL) {
BIO_set_fp(out, stdout, BIO_NOCLOSE);
} else {
if (BIO_write_filename(out, dsaparam_config.outfile) <= 0) {
perror(dsaparam_config.outfile);
goto end;
}
}
if (numbits > 0) {
BN_GENCB cb;
BN_GENCB_set(&cb, dsa_cb, bio_err);
dsa = DSA_new();
if (!dsa) {
BIO_printf(bio_err, "Error allocating DSA object\n");
goto end;
}
BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", numbits);
BIO_printf(bio_err, "This could take some time\n");
if (!DSA_generate_parameters_ex(dsa, numbits, NULL, 0, NULL, NULL, &cb)) {
ERR_print_errors(bio_err);
BIO_printf(bio_err, "Error, DSA key generation failed\n");
goto end;
}
} else if (dsaparam_config.informat == FORMAT_ASN1)
dsa = d2i_DSAparams_bio(in, NULL);
else if (dsaparam_config.informat == FORMAT_PEM)
dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
else {
BIO_printf(bio_err, "bad input format specified\n");
goto end;
}
if (dsa == NULL) {
BIO_printf(bio_err, "unable to load DSA parameters\n");
ERR_print_errors(bio_err);
goto end;
}
if (dsaparam_config.text) {
DSAparams_print(out, dsa);
}
if (dsaparam_config.C) {
unsigned char *data;
int l, len, bits_p;
len = BN_num_bytes(dsa->p);
bits_p = BN_num_bits(dsa->p);
data = malloc(len + 20);
if (data == NULL) {
perror("malloc");
goto end;
}
l = BN_bn2bin(dsa->p, data);
printf("static unsigned char dsa%d_p[] = {", bits_p);
for (i = 0; i < l; i++) {
if ((i % 12) == 0)
printf("\n\t");
printf("0x%02X, ", data[i]);
}
printf("\n\t};\n");
l = BN_bn2bin(dsa->q, data);
printf("static unsigned char dsa%d_q[] = {", bits_p);
for (i = 0; i < l; i++) {
if ((i % 12) == 0)
printf("\n\t");
printf("0x%02X, ", data[i]);
}
printf("\n\t};\n");
l = BN_bn2bin(dsa->g, data);
printf("static unsigned char dsa%d_g[] = {", bits_p);
for (i = 0; i < l; i++) {
if ((i % 12) == 0)
printf("\n\t");
printf("0x%02X, ", data[i]);
}
free(data);
printf("\n\t};\n\n");
printf("DSA *get_dsa%d()\n\t{\n", bits_p);
printf("\tDSA *dsa;\n\n");
printf("\tif ((dsa = DSA_new()) == NULL) return(NULL);\n");
printf("\tdsa->p = BN_bin2bn(dsa%d_p, sizeof(dsa%d_p), NULL);\n",
bits_p, bits_p);
printf("\tdsa->q = BN_bin2bn(dsa%d_q, sizeof(dsa%d_q), NULL);\n",
bits_p, bits_p);
printf("\tdsa->g = BN_bin2bn(dsa%d_g, sizeof(dsa%d_g), NULL);\n",
bits_p, bits_p);
printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
printf("\treturn(dsa);\n\t}\n");
}
if (!dsaparam_config.noout) {
if (dsaparam_config.outformat == FORMAT_ASN1)
i = i2d_DSAparams_bio(out, dsa);
else if (dsaparam_config.outformat == FORMAT_PEM)
i = PEM_write_bio_DSAparams(out, dsa);
else {
BIO_printf(bio_err, "bad output format specified for outfile\n");
goto end;
}
if (!i) {
BIO_printf(bio_err, "unable to write DSA parameters\n");
ERR_print_errors(bio_err);
goto end;
}
}
if (dsaparam_config.genkey) {
DSA *dsakey;
if ((dsakey = DSAparams_dup(dsa)) == NULL)
goto end;
if (!DSA_generate_key(dsakey)) {
ERR_print_errors(bio_err);
DSA_free(dsakey);
goto end;
}
if (dsaparam_config.outformat == FORMAT_ASN1)
i = i2d_DSAPrivateKey_bio(out, dsakey);
else if (dsaparam_config.outformat == FORMAT_PEM)
i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL, NULL);
else {
BIO_printf(bio_err, "bad output format specified for outfile\n");
DSA_free(dsakey);
goto end;
}
DSA_free(dsakey);
}
ret = 0;
end:
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dsa != NULL)
DSA_free(dsa);
return (ret);
}
static int
dsa_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 GENCB_TEST
if (stop_keygen_flag)
return 0;
#endif
return 1;
}