1 /* apps/gendh.c */ 2 /* obsoleted by dhparam.c */ 3 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 4 * All rights reserved. 5 * 6 * This package is an SSL implementation written 7 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 #include <openssl/opensslconf.h> 61 /* Until the key-gen callbacks are modified to use newer prototypes, we allow 62 * deprecated functions for openssl-internal code */ 63 #ifdef OPENSSL_NO_DEPRECATED 64 #undef OPENSSL_NO_DEPRECATED 65 #endif 66 67 #ifndef OPENSSL_NO_DH 68 #include <stdio.h> 69 #include <string.h> 70 #include <sys/types.h> 71 #include <sys/stat.h> 72 #include "apps.h" 73 #include <openssl/bio.h> 74 #include <openssl/rand.h> 75 #include <openssl/err.h> 76 #include <openssl/bn.h> 77 #include <openssl/dh.h> 78 #include <openssl/x509.h> 79 #include <openssl/pem.h> 80 81 #define DEFBITS 512 82 #undef PROG 83 #define PROG gendh_main 84 85 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb); 86 87 int MAIN(int, char **); 88 89 int MAIN(int argc, char **argv) 90 { 91 BN_GENCB cb; 92 DH *dh=NULL; 93 int ret=1,num=DEFBITS; 94 int g=2; 95 char *outfile=NULL; 96 char *inrand=NULL; 97 #ifndef OPENSSL_NO_ENGINE 98 char *engine=NULL; 99 #endif 100 BIO *out=NULL; 101 102 apps_startup(); 103 104 BN_GENCB_set(&cb, dh_cb, bio_err); 105 if (bio_err == NULL) 106 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 107 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 108 109 if (!load_config(bio_err, NULL)) 110 goto end; 111 112 argv++; 113 argc--; 114 for (;;) 115 { 116 if (argc <= 0) break; 117 if (strcmp(*argv,"-out") == 0) 118 { 119 if (--argc < 1) goto bad; 120 outfile= *(++argv); 121 } 122 else if (strcmp(*argv,"-2") == 0) 123 g=2; 124 /* else if (strcmp(*argv,"-3") == 0) 125 g=3; */ 126 else if (strcmp(*argv,"-5") == 0) 127 g=5; 128 #ifndef OPENSSL_NO_ENGINE 129 else if (strcmp(*argv,"-engine") == 0) 130 { 131 if (--argc < 1) goto bad; 132 engine= *(++argv); 133 } 134 #endif 135 else if (strcmp(*argv,"-rand") == 0) 136 { 137 if (--argc < 1) goto bad; 138 inrand= *(++argv); 139 } 140 else 141 break; 142 argv++; 143 argc--; 144 } 145 if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0))) 146 { 147 bad: 148 BIO_printf(bio_err,"usage: gendh [args] [numbits]\n"); 149 BIO_printf(bio_err," -out file - output the key to 'file\n"); 150 BIO_printf(bio_err," -2 - use 2 as the generator value\n"); 151 /* BIO_printf(bio_err," -3 - use 3 as the generator value\n"); */ 152 BIO_printf(bio_err," -5 - use 5 as the generator value\n"); 153 #ifndef OPENSSL_NO_ENGINE 154 BIO_printf(bio_err," -engine e - use engine e, possibly a hardware device.\n"); 155 #endif 156 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 157 BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); 158 BIO_printf(bio_err," the random number generator\n"); 159 goto end; 160 } 161 162 #ifndef OPENSSL_NO_ENGINE 163 setup_engine(bio_err, engine, 0); 164 #endif 165 166 out=BIO_new(BIO_s_file()); 167 if (out == NULL) 168 { 169 ERR_print_errors(bio_err); 170 goto end; 171 } 172 173 if (outfile == NULL) 174 { 175 BIO_set_fp(out,stdout,BIO_NOCLOSE); 176 #ifdef OPENSSL_SYS_VMS 177 { 178 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 179 out = BIO_push(tmpbio, out); 180 } 181 #endif 182 } 183 else 184 { 185 if (BIO_write_filename(out,outfile) <= 0) 186 { 187 perror(outfile); 188 goto end; 189 } 190 } 191 192 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) 193 { 194 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); 195 } 196 if (inrand != NULL) 197 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 198 app_RAND_load_files(inrand)); 199 200 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g); 201 BIO_printf(bio_err,"This is going to take a long time\n"); 202 203 if(((dh = DH_new()) == NULL) || !DH_generate_parameters_ex(dh, num, g, &cb)) 204 goto end; 205 206 app_RAND_write_file(NULL, bio_err); 207 208 if (!PEM_write_bio_DHparams(out,dh)) 209 goto end; 210 ret=0; 211 end: 212 if (ret != 0) 213 ERR_print_errors(bio_err); 214 if (out != NULL) BIO_free_all(out); 215 if (dh != NULL) DH_free(dh); 216 apps_shutdown(); 217 OPENSSL_EXIT(ret); 218 } 219 220 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb) 221 { 222 char c='*'; 223 224 if (p == 0) c='.'; 225 if (p == 1) c='+'; 226 if (p == 2) c='*'; 227 if (p == 3) c='\n'; 228 BIO_write(cb->arg,&c,1); 229 (void)BIO_flush(cb->arg); 230 #ifdef LINT 231 p=n; 232 #endif 233 return 1; 234 } 235 #else /* !OPENSSL_NO_DH */ 236 237 # if PEDANTIC 238 static void *dummy=&dummy; 239 # endif 240 241 #endif 242
