bdd58d9846
The different apps had the liberty to decide whether they would open their input and output files in binary mode or not, which could be confusing if two different apps were handling the same type of file in different ways. The solution is to centralise the decision of low level file organisation, and that the apps would use a selection of formats to state the intent of the file. Reviewed-by: Tim Hudson <tjh@openssl.org>
456 lines
15 KiB
C
456 lines
15 KiB
C
/* 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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/* ====================================================================
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* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */
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#ifndef OPENSSL_NO_DH
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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/dh.h>
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# include <openssl/x509.h>
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# include <openssl/pem.h>
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# ifndef OPENSSL_NO_DSA
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# include <openssl/dsa.h>
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# endif
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# define DEFBITS 2048
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static int dh_cb(int p, int n, BN_GENCB *cb);
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typedef enum OPTION_choice {
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OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
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OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
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OPT_RAND, OPT_DSAPARAM, OPT_C, OPT_2, OPT_5
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} OPTION_CHOICE;
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OPTIONS dhparam_options[] = {
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{OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"},
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{OPT_HELP_STR, 1, '-', "Valid options are:\n"},
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{"help", OPT_HELP, '-', "Display this summary"},
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{"in", OPT_IN, '<', "Input file"},
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{"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
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{"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
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{"out", OPT_OUT, '>', "Output file"},
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{"check", OPT_CHECK, '-', "Check the DH parameters"},
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{"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
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{"noout", OPT_NOOUT, '-'},
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{"rand", OPT_RAND, 's',
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"Load the file(s) into the random number generator"},
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{"C", OPT_C, '-', "Print C code"},
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{"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
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{"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
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# ifndef OPENSSL_NO_DSA
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{"dsaparam", OPT_DSAPARAM, '-',
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"Read or generate DSA parameters, convert to DH"},
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# endif
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# ifndef OPENSSL_NO_ENGINE
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{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
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# endif
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{NULL}
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};
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int dhparam_main(int argc, char **argv)
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{
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BIO *in = NULL, *out = NULL;
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DH *dh = NULL;
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char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL;
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int dsaparam = 0, i, text = 0, C = 0, ret = 1, num = 0, g = 0;
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int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
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OPTION_CHOICE o;
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prog = opt_init(argc, argv, dhparam_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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opthelp:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(dhparam_options);
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ret = 0;
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goto end;
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case OPT_INFORM:
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if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
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goto opthelp;
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break;
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case OPT_OUTFORM:
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if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
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goto opthelp;
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break;
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case OPT_IN:
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infile = opt_arg();
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break;
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case OPT_OUT:
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outfile = opt_arg();
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break;
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case OPT_ENGINE:
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(void)setup_engine(opt_arg(), 0);
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break;
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case OPT_CHECK:
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check = 1;
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break;
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case OPT_TEXT:
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text = 1;
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break;
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case OPT_DSAPARAM:
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dsaparam = 1;
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break;
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case OPT_C:
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C = 1;
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break;
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case OPT_2:
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g = 2;
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break;
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case OPT_5:
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g = 5;
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break;
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case OPT_NOOUT:
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noout = 1;
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break;
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case OPT_RAND:
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inrand = opt_arg();
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break;
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}
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}
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argc = opt_num_rest();
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argv = opt_rest();
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if (!app_load_modules(NULL))
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goto end;
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if (argv[0] && (!opt_int(argv[0], &num) || num <= 0))
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goto end;
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if (g && !num)
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num = DEFBITS;
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# ifndef OPENSSL_NO_DSA
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if (dsaparam && g) {
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BIO_printf(bio_err,
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"generator may not be chosen for DSA parameters\n");
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goto end;
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}
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# endif
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/* DH parameters */
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if (num && !g)
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g = 2;
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if (num) {
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BN_GENCB *cb;
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cb = BN_GENCB_new();
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if (!cb) {
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ERR_print_errors(bio_err);
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goto end;
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}
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BN_GENCB_set(cb, dh_cb, bio_err);
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if (!app_RAND_load_file(NULL, 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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# ifndef OPENSSL_NO_DSA
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if (dsaparam) {
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DSA *dsa = DSA_new();
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BIO_printf(bio_err,
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"Generating DSA parameters, %d bit long prime\n", num);
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if (!dsa
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|| !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
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cb)) {
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DSA_free(dsa);
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BN_GENCB_free(cb);
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ERR_print_errors(bio_err);
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goto end;
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}
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dh = DSA_dup_DH(dsa);
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DSA_free(dsa);
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if (dh == NULL) {
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BN_GENCB_free(cb);
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ERR_print_errors(bio_err);
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goto end;
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}
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} else
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# endif
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{
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dh = DH_new();
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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_generate_parameters_ex(dh, num, g, cb)) {
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BN_GENCB_free(cb);
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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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BN_GENCB_free(cb);
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app_RAND_write_file(NULL);
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} else {
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in = bio_open_default(infile, 'r', informat);
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if (in == NULL)
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goto end;
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# ifndef OPENSSL_NO_DSA
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if (dsaparam) {
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DSA *dsa;
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if (informat == FORMAT_ASN1)
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dsa = d2i_DSAparams_bio(in, NULL);
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else /* informat == FORMAT_PEM */
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dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
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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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dh = DSA_dup_DH(dsa);
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DSA_free(dsa);
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if (dh == NULL) {
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ERR_print_errors(bio_err);
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goto end;
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}
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} else
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# endif
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{
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if (informat == FORMAT_ASN1)
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dh = d2i_DHparams_bio(in, NULL);
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else /* informat == FORMAT_PEM */
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dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
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if (dh == NULL) {
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BIO_printf(bio_err, "unable to load DH 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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/* dh != NULL */
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}
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out = bio_open_default(outfile, 'w', outformat);
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if (out == NULL)
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goto end;
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if (text) {
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DHparams_print(out, dh);
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}
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if (check) {
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if (!DH_check(dh, &i)) {
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ERR_print_errors(bio_err);
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goto end;
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}
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if (i & DH_CHECK_P_NOT_PRIME)
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printf("p value is not prime\n");
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if (i & DH_CHECK_P_NOT_SAFE_PRIME)
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printf("p value is not a safe prime\n");
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if (i & DH_UNABLE_TO_CHECK_GENERATOR)
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printf("unable to check the generator value\n");
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if (i & DH_NOT_SUITABLE_GENERATOR)
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printf("the g value is not a generator\n");
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if (i == 0)
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printf("DH parameters appear to be ok.\n");
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}
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if (C) {
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unsigned char *data;
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int len, bits;
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len = BN_num_bytes(dh->p);
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bits = BN_num_bits(dh->p);
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data = app_malloc(len, "print a BN");
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BIO_printf(out, "#ifndef HEADER_DH_H\n"
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"# include <openssl/dh.h>\n"
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"#endif\n"
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"\n");
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BIO_printf(out, "DH *get_dh%d()\n{\n", bits);
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print_bignum_var(out, dh->p, "dhp", bits, data);
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print_bignum_var(out, dh->g, "dhg", bits, data);
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BIO_printf(out, " DH *dh = DN_new();\n"
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"\n"
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" if (dh == NULL)\n"
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" return NULL;\n");
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BIO_printf(out, " dh->p = BN_bin2bn(dhp_%d, sizeof (dhp_%d), NULL);\n",
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bits, bits);
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BIO_printf(out, " dh->g = BN_bin2bn(dhg_%d, sizeof (dhg_%d), NULL);\n",
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bits, bits);
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BIO_printf(out, " if (!dh->p || !dh->g) {\n"
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" DH_free(dh);\n"
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" return NULL;\n"
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" }\n");
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if (dh->length)
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BIO_printf(out,
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" dh->length = %ld;\n", dh->length);
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BIO_printf(out, " return dh;\n}\n");
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OPENSSL_free(data);
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}
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if (!noout) {
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if (outformat == FORMAT_ASN1)
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i = i2d_DHparams_bio(out, dh);
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else if (dh->q)
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i = PEM_write_bio_DHxparams(out, dh);
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else
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i = PEM_write_bio_DHparams(out, dh);
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if (!i) {
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BIO_printf(bio_err, "unable to write DH 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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ret = 0;
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end:
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BIO_free(in);
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BIO_free_all(out);
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DH_free(dh);
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return (ret);
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}
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static int 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(BN_GENCB_get_arg(cb), &c, 1);
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(void)BIO_flush(BN_GENCB_get_arg(cb));
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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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