339 lines
9.0 KiB
C
339 lines
9.0 KiB
C
/* apps/dh.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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#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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#undef PROG
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#define PROG dh_main
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/* -inform arg - input format - default PEM (DER or PEM)
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* -outform arg - output format - default PEM
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* -in arg - input file - default stdin
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* -out arg - output file - default stdout
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* -check - check the parameters are ok
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* -noout
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* -text
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* -C
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*/
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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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ENGINE *e = NULL;
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DH *dh=NULL;
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int i,badops=0,text=0;
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BIO *in=NULL,*out=NULL;
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int informat,outformat,check=0,noout=0,C=0,ret=1;
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char *infile,*outfile,*prog,*engine;
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apps_startup();
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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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engine=NULL;
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infile=NULL;
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outfile=NULL;
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informat=FORMAT_PEM;
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outformat=FORMAT_PEM;
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prog=argv[0];
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argc--;
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argv++;
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while (argc >= 1)
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{
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if (strcmp(*argv,"-inform") == 0)
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{
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if (--argc < 1) goto bad;
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informat=str2fmt(*(++argv));
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}
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else if (strcmp(*argv,"-outform") == 0)
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{
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if (--argc < 1) goto bad;
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outformat=str2fmt(*(++argv));
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}
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else if (strcmp(*argv,"-in") == 0)
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{
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if (--argc < 1) goto bad;
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infile= *(++argv);
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}
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else if (strcmp(*argv,"-out") == 0)
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{
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if (--argc < 1) goto bad;
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outfile= *(++argv);
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}
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else if (strcmp(*argv,"-engine") == 0)
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{
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if (--argc < 1) goto bad;
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engine= *(++argv);
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}
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else if (strcmp(*argv,"-check") == 0)
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check=1;
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else if (strcmp(*argv,"-text") == 0)
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text=1;
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else if (strcmp(*argv,"-C") == 0)
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C=1;
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else if (strcmp(*argv,"-noout") == 0)
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noout=1;
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else
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{
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BIO_printf(bio_err,"unknown option %s\n",*argv);
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badops=1;
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break;
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}
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argc--;
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argv++;
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}
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if (badops)
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{
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bad:
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BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
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BIO_printf(bio_err,"where options are\n");
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BIO_printf(bio_err," -inform arg input format - one of DER PEM\n");
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BIO_printf(bio_err," -outform arg output format - one of DER PEM\n");
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BIO_printf(bio_err," -in arg input file\n");
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BIO_printf(bio_err," -out arg output file\n");
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BIO_printf(bio_err," -check check the DH parameters\n");
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BIO_printf(bio_err," -text print a text form of the DH parameters\n");
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BIO_printf(bio_err," -C Output C code\n");
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BIO_printf(bio_err," -noout no output\n");
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BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n");
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goto end;
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}
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ERR_load_crypto_strings();
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e = setup_engine(bio_err, engine, 0);
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in=BIO_new(BIO_s_file());
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out=BIO_new(BIO_s_file());
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if ((in == NULL) || (out == NULL))
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{
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ERR_print_errors(bio_err);
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goto end;
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}
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if (infile == NULL)
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BIO_set_fp(in,stdin,BIO_NOCLOSE);
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else
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{
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if (BIO_read_filename(in,infile) <= 0)
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{
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perror(infile);
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goto end;
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}
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}
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if (outfile == NULL)
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{
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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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}
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else
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{
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if (BIO_write_filename(out,outfile) <= 0)
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{
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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 (informat == FORMAT_ASN1)
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dh=d2i_DHparams_bio(in,NULL);
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else if (informat == FORMAT_PEM)
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dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
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else
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{
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BIO_printf(bio_err,"bad input format specified\n");
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goto end;
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}
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if (dh == NULL)
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{
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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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if (text)
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{
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DHparams_print(out,dh);
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#ifdef undef
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printf("p=");
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BN_print(stdout,dh->p);
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printf("\ng=");
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BN_print(stdout,dh->g);
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printf("\n");
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if (dh->length != 0)
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printf("recommended private length=%ld\n",dh->length);
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#endif
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}
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if (check)
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{
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if (!DH_check(dh,&i))
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{
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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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{
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unsigned char *data;
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int len,l,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=(unsigned char *)OPENSSL_malloc(len);
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if (data == NULL)
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{
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perror("OPENSSL_malloc");
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goto end;
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}
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l=BN_bn2bin(dh->p,data);
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printf("static unsigned char dh%d_p[]={",bits);
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for (i=0; i<l; i++)
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{
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if ((i%12) == 0) printf("\n\t");
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printf("0x%02X,",data[i]);
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}
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printf("\n\t};\n");
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l=BN_bn2bin(dh->g,data);
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printf("static unsigned char dh%d_g[]={",bits);
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for (i=0; i<l; i++)
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{
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if ((i%12) == 0) printf("\n\t");
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printf("0x%02X,",data[i]);
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}
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printf("\n\t};\n\n");
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printf("DH *get_dh%d()\n\t{\n",bits);
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printf("\tDH *dh;\n\n");
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printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
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printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
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bits,bits);
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printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
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bits,bits);
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printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
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printf("\t\treturn(NULL);\n");
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printf("\treturn(dh);\n\t}\n");
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OPENSSL_free(data);
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}
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if (!noout)
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{
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if (outformat == FORMAT_ASN1)
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i=i2d_DHparams_bio(out,dh);
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else if (outformat == FORMAT_PEM)
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i=PEM_write_bio_DHparams(out,dh);
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else {
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BIO_printf(bio_err,"bad output format specified for outfile\n");
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goto end;
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}
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if (!i)
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{
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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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if (in != NULL) BIO_free(in);
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if (out != NULL) BIO_free_all(out);
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if (dh != NULL) DH_free(dh);
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apps_shutdown();
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OPENSSL_EXIT(ret);
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}
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#endif
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