gendh.c revision 59191
1/* apps/gendh.c */ 2/* obsoleted by dhparam.c */ 3/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 4 * All rights reserved. 5 * 6 * This package is an SSL implementation written 7 * by Eric Young (eay@cryptsoft.com). 8 * The implementation was written so as to conform with Netscapes SSL. 9 * 10 * This library is free for commercial and non-commercial use as long as 11 * the following conditions are aheared to. The following conditions 12 * apply to all code found in this distribution, be it the RC4, RSA, 13 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 14 * included with this distribution is covered by the same copyright terms 15 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 16 * 17 * Copyright remains Eric Young's, and as such any Copyright notices in 18 * the code are not to be removed. 19 * If this package is used in a product, Eric Young should be given attribution 20 * as the author of the parts of the library used. 21 * This can be in the form of a textual message at program startup or 22 * in documentation (online or textual) provided with the package. 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 3. All advertising materials mentioning features or use of this software 33 * must display the following acknowledgement: 34 * "This product includes cryptographic software written by 35 * Eric Young (eay@cryptsoft.com)" 36 * The word 'cryptographic' can be left out if the rouines from the library 37 * being used are not cryptographic related :-). 38 * 4. If you include any Windows specific code (or a derivative thereof) from 39 * the apps directory (application code) you must include an acknowledgement: 40 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 41 * 42 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 45 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * 54 * The licence and distribution terms for any publically available version or 55 * derivative of this code cannot be changed. i.e. this code cannot simply be 56 * copied and put under another distribution licence 57 * [including the GNU Public Licence.] 58 */ 59 60#ifndef NO_DH 61#include <stdio.h> 62#include <string.h> 63#include <sys/types.h> 64#include <sys/stat.h> 65#include "apps.h" 66#include <openssl/bio.h> 67#include <openssl/rand.h> 68#include <openssl/err.h> 69#include <openssl/bn.h> 70#include <openssl/dh.h> 71#include <openssl/x509.h> 72#include <openssl/pem.h> 73 74#define DEFBITS 512 75#undef PROG 76#define PROG gendh_main 77 78static void MS_CALLBACK dh_cb(int p, int n, void *arg); 79 80int MAIN(int, char **); 81 82int MAIN(int argc, char **argv) 83 { 84 DH *dh=NULL; 85 int ret=1,num=DEFBITS; 86 int g=2; 87 char *outfile=NULL; 88 char *inrand=NULL; 89 BIO *out=NULL; 90 91 apps_startup(); 92 93 if (bio_err == NULL) 94 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 95 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 96 97 argv++; 98 argc--; 99 for (;;) 100 { 101 if (argc <= 0) break; 102 if (strcmp(*argv,"-out") == 0) 103 { 104 if (--argc < 1) goto bad; 105 outfile= *(++argv); 106 } 107 else if (strcmp(*argv,"-2") == 0) 108 g=2; 109 /* else if (strcmp(*argv,"-3") == 0) 110 g=3; */ 111 else if (strcmp(*argv,"-5") == 0) 112 g=5; 113 else if (strcmp(*argv,"-rand") == 0) 114 { 115 if (--argc < 1) goto bad; 116 inrand= *(++argv); 117 } 118 else 119 break; 120 argv++; 121 argc--; 122 } 123 if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0))) 124 { 125bad: 126 BIO_printf(bio_err,"usage: gendh [args] [numbits]\n"); 127 BIO_printf(bio_err," -out file - output the key to 'file\n"); 128 BIO_printf(bio_err," -2 use 2 as the generator value\n"); 129 /* BIO_printf(bio_err," -3 use 3 as the generator value\n"); */ 130 BIO_printf(bio_err," -5 use 5 as the generator value\n"); 131 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 132 BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); 133 BIO_printf(bio_err," the random number generator\n"); 134 goto end; 135 } 136 137 out=BIO_new(BIO_s_file()); 138 if (out == NULL) 139 { 140 ERR_print_errors(bio_err); 141 goto end; 142 } 143 144 if (outfile == NULL) 145 BIO_set_fp(out,stdout,BIO_NOCLOSE); 146 else 147 { 148 if (BIO_write_filename(out,outfile) <= 0) 149 { 150 perror(outfile); 151 goto end; 152 } 153 } 154 155 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) 156 { 157 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); 158 } 159 if (inrand != NULL) 160 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 161 app_RAND_load_files(inrand)); 162 163 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g); 164 BIO_printf(bio_err,"This is going to take a long time\n"); 165 dh=DH_generate_parameters(num,g,dh_cb,bio_err); 166 167 if (dh == NULL) goto end; 168 169 app_RAND_write_file(NULL, bio_err); 170 171 if (!PEM_write_bio_DHparams(out,dh)) 172 goto end; 173 ret=0; 174end: 175 if (ret != 0) 176 ERR_print_errors(bio_err); 177 if (out != NULL) BIO_free(out); 178 if (dh != NULL) DH_free(dh); 179 EXIT(ret); 180 } 181 182static void MS_CALLBACK dh_cb(int p, int n, void *arg) 183 { 184 char c='*'; 185 186 if (p == 0) c='.'; 187 if (p == 1) c='+'; 188 if (p == 2) c='*'; 189 if (p == 3) c='\n'; 190 BIO_write((BIO *)arg,&c,1); 191 (void)BIO_flush((BIO *)arg); 192#ifdef LINT 193 p=n; 194#endif 195 } 196#endif 197