gendh.c revision 111147
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 OPENSSL_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#ifndef OPENSSL_NO_ENGINE 85 ENGINE *e = NULL; 86#endif 87 DH *dh=NULL; 88 int ret=1,num=DEFBITS; 89 int g=2; 90 char *outfile=NULL; 91 char *inrand=NULL; 92#ifndef OPENSSL_NO_ENGINE 93 char *engine=NULL; 94#endif 95 BIO *out=NULL; 96 97 apps_startup(); 98 99 if (bio_err == NULL) 100 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 101 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 102 103 if (!load_config(bio_err, NULL)) 104 goto end; 105 106 argv++; 107 argc--; 108 for (;;) 109 { 110 if (argc <= 0) break; 111 if (strcmp(*argv,"-out") == 0) 112 { 113 if (--argc < 1) goto bad; 114 outfile= *(++argv); 115 } 116 else if (strcmp(*argv,"-2") == 0) 117 g=2; 118 /* else if (strcmp(*argv,"-3") == 0) 119 g=3; */ 120 else if (strcmp(*argv,"-5") == 0) 121 g=5; 122#ifndef OPENSSL_NO_ENGINE 123 else if (strcmp(*argv,"-engine") == 0) 124 { 125 if (--argc < 1) goto bad; 126 engine= *(++argv); 127 } 128#endif 129 else if (strcmp(*argv,"-rand") == 0) 130 { 131 if (--argc < 1) goto bad; 132 inrand= *(++argv); 133 } 134 else 135 break; 136 argv++; 137 argc--; 138 } 139 if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0))) 140 { 141bad: 142 BIO_printf(bio_err,"usage: gendh [args] [numbits]\n"); 143 BIO_printf(bio_err," -out file - output the key to 'file\n"); 144 BIO_printf(bio_err," -2 - use 2 as the generator value\n"); 145 /* BIO_printf(bio_err," -3 - use 3 as the generator value\n"); */ 146 BIO_printf(bio_err," -5 - use 5 as the generator value\n"); 147#ifndef OPENSSL_NO_ENGINE 148 BIO_printf(bio_err," -engine e - use engine e, possibly a hardware device.\n"); 149#endif 150 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 151 BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); 152 BIO_printf(bio_err," the random number generator\n"); 153 goto end; 154 } 155 156#ifndef OPENSSL_NO_ENGINE 157 e = setup_engine(bio_err, engine, 0); 158#endif 159 160 out=BIO_new(BIO_s_file()); 161 if (out == NULL) 162 { 163 ERR_print_errors(bio_err); 164 goto end; 165 } 166 167 if (outfile == NULL) 168 { 169 BIO_set_fp(out,stdout,BIO_NOCLOSE); 170#ifdef OPENSSL_SYS_VMS 171 { 172 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 173 out = BIO_push(tmpbio, out); 174 } 175#endif 176 } 177 else 178 { 179 if (BIO_write_filename(out,outfile) <= 0) 180 { 181 perror(outfile); 182 goto end; 183 } 184 } 185 186 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) 187 { 188 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); 189 } 190 if (inrand != NULL) 191 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 192 app_RAND_load_files(inrand)); 193 194 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g); 195 BIO_printf(bio_err,"This is going to take a long time\n"); 196 dh=DH_generate_parameters(num,g,dh_cb,bio_err); 197 198 if (dh == NULL) goto end; 199 200 app_RAND_write_file(NULL, bio_err); 201 202 if (!PEM_write_bio_DHparams(out,dh)) 203 goto end; 204 ret=0; 205end: 206 if (ret != 0) 207 ERR_print_errors(bio_err); 208 if (out != NULL) BIO_free_all(out); 209 if (dh != NULL) DH_free(dh); 210 apps_shutdown(); 211 OPENSSL_EXIT(ret); 212 } 213 214static void MS_CALLBACK dh_cb(int p, int n, void *arg) 215 { 216 char c='*'; 217 218 if (p == 0) c='.'; 219 if (p == 1) c='+'; 220 if (p == 2) c='*'; 221 if (p == 3) c='\n'; 222 BIO_write((BIO *)arg,&c,1); 223 (void)BIO_flush((BIO *)arg); 224#ifdef LINT 225 p=n; 226#endif 227 } 228#endif 229