1 /* apps/genrsa.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #ifndef NO_RSA 60 #include <stdio.h> 61 #include <string.h> 62 #include <sys/types.h> 63 #include <sys/stat.h> 64 #include "apps.h" 65 #include <openssl/bio.h> 66 #include <openssl/rand.h> 67 #include <openssl/err.h> 68 #include <openssl/bn.h> 69 #include <openssl/rsa.h> 70 #include <openssl/evp.h> 71 #include <openssl/x509.h> 72 #include <openssl/pem.h> 73 74 #define DEFBITS 512 75 #undef PROG 76 #define PROG genrsa_main 77 78 static void MS_CALLBACK genrsa_cb(int p, int n, void *arg); 79 static long gr_load_rand(char *names); 80 int MAIN(int argc, char **argv) 81 { 82 int ret=1; 83 char buffer[200]; 84 RSA *rsa=NULL; 85 int i,num=DEFBITS; 86 long rnum=0,l; 87 EVP_CIPHER *enc=NULL; 88 unsigned long f4=RSA_F4; 89 char *outfile=NULL; 90 char *inrand=NULL,*randfile; 91 BIO *out=NULL; 92 93 apps_startup(); 94 95 if (bio_err == NULL) 96 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 97 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 98 if ((out=BIO_new(BIO_s_file())) == NULL) 99 { 100 BIO_printf(bio_err,"unable to creat BIO for output\n"); 101 goto err; 102 } 103 104 argv++; 105 argc--; 106 for (;;) 107 { 108 if (argc <= 0) break; 109 if (strcmp(*argv,"-out") == 0) 110 { 111 if (--argc < 1) goto bad; 112 outfile= *(++argv); 113 } 114 else if (strcmp(*argv,"-3") == 0) 115 f4=3; 116 else if (strcmp(*argv,"-F4") == 0) 117 f4=RSA_F4; 118 else if (strcmp(*argv,"-rand") == 0) 119 { 120 if (--argc < 1) goto bad; 121 inrand= *(++argv); 122 } 123 #ifndef NO_DES 124 else if (strcmp(*argv,"-des") == 0) 125 enc=EVP_des_cbc(); 126 else if (strcmp(*argv,"-des3") == 0) 127 enc=EVP_des_ede3_cbc(); 128 #endif 129 #ifndef NO_IDEA 130 else if (strcmp(*argv,"-idea") == 0) 131 enc=EVP_idea_cbc(); 132 #endif 133 else 134 break; 135 argv++; 136 argc--; 137 } 138 if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0))) 139 { 140 bad: 141 BIO_printf(bio_err,"usage: genrsa [args] [numbits]\n"); 142 BIO_printf(bio_err," -des - encrypt the generated key with DES in cbc mode\n"); 143 BIO_printf(bio_err," -des3 - encrypt the generated key with DES in ede cbc mode (168 bit key)\n"); 144 #ifndef NO_IDEA 145 BIO_printf(bio_err," -idea - encrypt the generated key with IDEA in cbc mode\n"); 146 #endif 147 BIO_printf(bio_err," -out file - output the key to 'file\n"); 148 BIO_printf(bio_err," -f4 - use F4 (0x10001) for the E value\n"); 149 BIO_printf(bio_err," -3 - use 3 for the E value\n"); 150 BIO_printf(bio_err," -rand file:file:...\n"); 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 err; 154 } 155 156 ERR_load_crypto_strings(); 157 if (outfile == NULL) 158 BIO_set_fp(out,stdout,BIO_NOCLOSE); 159 else 160 { 161 if (BIO_write_filename(out,outfile) <= 0) 162 { 163 perror(outfile); 164 goto err; 165 } 166 } 167 168 #ifdef WINDOWS 169 BIO_printf(bio_err,"Loading 'screen' into random state -"); 170 BIO_flush(bio_err); 171 RAND_screen(); 172 BIO_printf(bio_err," done\n"); 173 #endif 174 randfile=RAND_file_name(buffer,200); 175 if ((randfile == NULL) || 176 !(rnum=(long)RAND_load_file(randfile,1024L*1024L))) 177 { 178 BIO_printf(bio_err,"unable to load 'random state'\n"); 179 } 180 181 if (inrand == NULL) 182 { 183 if (rnum == 0) 184 { 185 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); 186 } 187 } 188 else 189 { 190 rnum+=gr_load_rand(inrand); 191 } 192 if (rnum != 0) 193 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",rnum); 194 195 BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n", 196 num); 197 rsa=RSA_generate_key(num,f4,genrsa_cb,bio_err); 198 199 if (randfile == NULL) 200 BIO_printf(bio_err,"unable to write 'random state'\n"); 201 else 202 RAND_write_file(randfile); 203 204 if (rsa == NULL) goto err; 205 206 /* We need to do the folloing for when the base number size is < 207 * long, esp windows 3.1 :-(. */ 208 l=0L; 209 for (i=0; i<rsa->e->top; i++) 210 { 211 #ifndef SIXTY_FOUR_BIT 212 l<<=BN_BITS4; 213 l<<=BN_BITS4; 214 #endif 215 l+=rsa->e->d[i]; 216 } 217 BIO_printf(bio_err,"e is %ld (0x%lX)\n",l,l); 218 if (!PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,0,NULL,NULL)) 219 goto err; 220 221 ret=0; 222 err: 223 if (rsa != NULL) RSA_free(rsa); 224 if (out != NULL) BIO_free(out); 225 if (ret != 0) 226 ERR_print_errors(bio_err); 227 EXIT(ret); 228 } 229 230 static void MS_CALLBACK genrsa_cb(int p, int n, void *arg) 231 { 232 char c='*'; 233 234 if (p == 0) c='.'; 235 if (p == 1) c='+'; 236 if (p == 2) c='*'; 237 if (p == 3) c='\n'; 238 BIO_write((BIO *)arg,&c,1); 239 (void)BIO_flush((BIO *)arg); 240 #ifdef LINT 241 p=n; 242 #endif 243 } 244 245 static long gr_load_rand(char *name) 246 { 247 char *p,*n; 248 int last; 249 long tot=0; 250 251 for (;;) 252 { 253 last=0; 254 for (p=name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++); 255 if (*p == '\0') last=1; 256 *p='\0'; 257 n=name; 258 name=p+1; 259 if (*n == '\0') break; 260 261 tot+=RAND_load_file(n,1024L*1024L); 262 if (last) break; 263 } 264 return(tot); 265 } 266 #endif 267