/* apps/dh.c */
/* obsoleted by dhparam.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young ([email protected]).
* 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 ([email protected]).
*
* 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 ([email protected])"
* 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 ([email protected])"
*
* 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_DH */
#ifndef OPENSSL_NO_DH
# include <stdio.h>
# include <stdlib.h>
# include <time.h>
# include <string.h>
# include "apps.h"
# include <openssl/bio.h>
# include <openssl/err.h>
# include <openssl/bn.h>
# include <openssl/dh.h>
# include <openssl/x509.h>
# include <openssl/pem.h>
# undef PROG
# define PROG dh_main
/*-
* -inform arg - input format - default PEM (DER or PEM)
* -outform arg - output format - default PEM
* -in arg - input file - default stdin
* -out arg - output file - default stdout
* -check - check the parameters are ok
* -noout
* -text
* -C
*/
int MAIN(int, char **);
int MAIN(int argc, char **argv)
{
DH *dh = NULL;
int i, badops = 0, text = 0;
BIO *in = NULL, *out = NULL;
int informat, outformat, check = 0, noout = 0, C = 0, ret = 1;
char *infile, *outfile, *prog;
char *engine;
apps_startup();
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;
engine = NULL;
infile = NULL;
outfile = NULL;
informat = FORMAT_PEM;
outformat = FORMAT_PEM;
prog = argv[0];
argc--;
argv++;
while (argc >= 1) {
if (strcmp(*argv, "-inform") == 0) {
if (--argc < 1)
goto bad;
informat = str2fmt(*(++argv));
} else if (strcmp(*argv, "-outform") == 0) {
if (--argc < 1)
goto bad;
outformat = str2fmt(*(++argv));
} else if (strcmp(*argv, "-in") == 0) {
if (--argc < 1)
goto bad;
infile = *(++argv);
} else if (strcmp(*argv, "-out") == 0) {
if (--argc < 1)
goto bad;
outfile = *(++argv);
}
# ifndef OPENSSL_NO_ENGINE
else if (strcmp(*argv, "-engine") == 0) {
if (--argc < 1)
goto bad;
engine = *(++argv);
}
# endif
else if (strcmp(*argv, "-check") == 0)
check = 1;
else if (strcmp(*argv, "-text") == 0)
text = 1;
else if (strcmp(*argv, "-C") == 0)
C = 1;
else if (strcmp(*argv, "-noout") == 0)
noout = 1;
else {
BIO_printf(bio_err, "unknown option %s\n", *argv);
badops = 1;
break;
}
argc--;
argv++;
}
if (badops) {
bad:
BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
BIO_printf(bio_err, "where options are\n");
BIO_printf(bio_err, " -inform arg input format - one of DER PEM\n");
BIO_printf(bio_err,
" -outform arg output format - one of DER PEM\n");
BIO_printf(bio_err, " -in arg input file\n");
BIO_printf(bio_err, " -out arg output file\n");
BIO_printf(bio_err, " -check check the DH parameters\n");
BIO_printf(bio_err,
" -text print a text form of the DH parameters\n");
BIO_printf(bio_err, " -C Output C code\n");
BIO_printf(bio_err, " -noout no output\n");
# ifndef OPENSSL_NO_ENGINE
BIO_printf(bio_err,
" -engine e use engine e, possibly a hardware device.\n");
# endif
goto end;
}
ERR_load_crypto_strings();
setup_engine(bio_err, engine, 0);
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 (infile == NULL)
BIO_set_fp(in, stdin, BIO_NOCLOSE);
else {
if (BIO_read_filename(in, infile) <= 0) {
perror(infile);
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 (informat == FORMAT_ASN1)
dh = d2i_DHparams_bio(in, NULL);
else if (informat == FORMAT_PEM)
dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
else {
BIO_printf(bio_err, "bad input format specified\n");
goto end;
}
if (dh == NULL) {
BIO_printf(bio_err, "unable to load DH parameters\n");
ERR_print_errors(bio_err);
goto end;
}
if (text) {
DHparams_print(out, dh);
# ifdef undef
printf("p=");
BN_print(stdout, dh->p);
printf("\ng=");
BN_print(stdout, dh->g);
printf("\n");
if (dh->length != 0)
printf("recommended private length=%ld\n", dh->length);
# endif
}
if (check) {
if (!DH_check(dh, &i)) {
ERR_print_errors(bio_err);
goto end;
}
if (i & DH_CHECK_P_NOT_PRIME)
printf("p value is not prime\n");
if (i & DH_CHECK_P_NOT_SAFE_PRIME)
printf("p value is not a safe prime\n");
if (i & DH_UNABLE_TO_CHECK_GENERATOR)
printf("unable to check the generator value\n");
if (i & DH_NOT_SUITABLE_GENERATOR)
printf("the g value is not a generator\n");
if (i == 0)
printf("DH parameters appear to be ok.\n");
}
if (C) {
unsigned char *data;
int len, l, bits;
len = BN_num_bytes(dh->p);
bits = BN_num_bits(dh->p);
data = (unsigned char *)OPENSSL_malloc(len);
if (data == NULL) {
perror("OPENSSL_malloc");
goto end;
}
l = BN_bn2bin(dh->p, data);
printf("static unsigned char dh%d_p[]={", bits);
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(dh->g, data);
printf("static unsigned char dh%d_g[]={", bits);
for (i = 0; i < l; i++) {
if ((i % 12) == 0)
printf("\n\t");
printf("0x%02X,", data[i]);
}
printf("\n\t};\n\n");
printf("DH *get_dh%d()\n\t{\n", bits);
printf("\tDH *dh;\n\n");
printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
bits, bits);
printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
bits, bits);
printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
printf("\t\treturn(NULL);\n");
printf("\treturn(dh);\n\t}\n");
OPENSSL_free(data);
}
if (!noout) {
if (outformat == FORMAT_ASN1)
i = i2d_DHparams_bio(out, dh);
else if (outformat == FORMAT_PEM)
i = PEM_write_bio_DHparams(out, dh);
else {
BIO_printf(bio_err, "bad output format specified for outfile\n");
goto end;
}
if (!i) {
BIO_printf(bio_err, "unable to write DH parameters\n");
ERR_print_errors(bio_err);
goto end;
}
}
ret = 0;
end:
if (in != NULL)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dh != NULL)
DH_free(dh);
apps_shutdown();
OPENSSL_EXIT(ret);
}
#else /* !OPENSSL_NO_DH */
# if PEDANTIC
static void *dummy = &dummy;
# endif
#endif