1 /* apps/rand.c */ 2 /* ==================================================================== 3 * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * 3. All advertising materials mentioning features or use of this 18 * software must display the following acknowledgment: 19 * "This product includes software developed by the OpenSSL Project 20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 21 * 22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 23 * endorse or promote products derived from this software without 24 * prior written permission. For written permission, please contact 25 * openssl-core@openssl.org. 26 * 27 * 5. Products derived from this software may not be called "OpenSSL" 28 * nor may "OpenSSL" appear in their names without prior written 29 * permission of the OpenSSL Project. 30 * 31 * 6. Redistributions of any form whatsoever must retain the following 32 * acknowledgment: 33 * "This product includes software developed by the OpenSSL Project 34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 47 * OF THE POSSIBILITY OF SUCH DAMAGE. 48 * ==================================================================== 49 * 50 * This product includes cryptographic software written by Eric Young 51 * (eay@cryptsoft.com). This product includes software written by Tim 52 * Hudson (tjh@cryptsoft.com). 53 * 54 */ 55 56 #include "apps.h" 57 58 #include <ctype.h> 59 #include <stdio.h> 60 #include <string.h> 61 62 #include <openssl/bio.h> 63 #include <openssl/err.h> 64 #include <openssl/rand.h> 65 66 #undef PROG 67 #define PROG rand_main 68 69 /* -out file - write to file 70 * -rand file:file - PRNG seed files 71 * -base64 - base64 encode output 72 * -hex - hex encode output 73 * num - write 'num' bytes 74 */ 75 76 int MAIN(int, char **); 77 78 int MAIN(int argc, char **argv) 79 { 80 int i, r, ret = 1; 81 int badopt; 82 char *outfile = NULL; 83 char *inrand = NULL; 84 int base64 = 0; 85 int hex = 0; 86 BIO *out = NULL; 87 int num = -1; 88 #ifndef OPENSSL_NO_ENGINE 89 char *engine=NULL; 90 #endif 91 92 apps_startup(); 93 94 if (bio_err == NULL) 95 if ((bio_err = BIO_new(BIO_s_file())) != NULL) 96 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT); 97 98 if (!load_config(bio_err, NULL)) 99 goto err; 100 101 badopt = 0; 102 i = 0; 103 while (!badopt && argv[++i] != NULL) 104 { 105 if (strcmp(argv[i], "-out") == 0) 106 { 107 if ((argv[i+1] != NULL) && (outfile == NULL)) 108 outfile = argv[++i]; 109 else 110 badopt = 1; 111 } 112 #ifndef OPENSSL_NO_ENGINE 113 else if (strcmp(argv[i], "-engine") == 0) 114 { 115 if ((argv[i+1] != NULL) && (engine == NULL)) 116 engine = argv[++i]; 117 else 118 badopt = 1; 119 } 120 #endif 121 else if (strcmp(argv[i], "-rand") == 0) 122 { 123 if ((argv[i+1] != NULL) && (inrand == NULL)) 124 inrand = argv[++i]; 125 else 126 badopt = 1; 127 } 128 else if (strcmp(argv[i], "-base64") == 0) 129 { 130 if (!base64) 131 base64 = 1; 132 else 133 badopt = 1; 134 } 135 else if (strcmp(argv[i], "-hex") == 0) 136 { 137 if (!hex) 138 hex = 1; 139 else 140 badopt = 1; 141 } 142 else if (isdigit((unsigned char)argv[i][0])) 143 { 144 if (num < 0) 145 { 146 r = sscanf(argv[i], "%d", &num); 147 if (r == 0 || num < 0) 148 badopt = 1; 149 } 150 else 151 badopt = 1; 152 } 153 else 154 badopt = 1; 155 } 156 157 if (hex && base64) 158 badopt = 1; 159 160 if (num < 0) 161 badopt = 1; 162 163 if (badopt) 164 { 165 BIO_printf(bio_err, "Usage: rand [options] num\n"); 166 BIO_printf(bio_err, "where options are\n"); 167 BIO_printf(bio_err, "-out file - write to file\n"); 168 #ifndef OPENSSL_NO_ENGINE 169 BIO_printf(bio_err, "-engine e - use engine e, possibly a hardware device.\n"); 170 #endif 171 BIO_printf(bio_err, "-rand file%cfile%c... - seed PRNG from files\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 172 BIO_printf(bio_err, "-base64 - base64 encode output\n"); 173 BIO_printf(bio_err, "-hex - hex encode output\n"); 174 goto err; 175 } 176 177 #ifndef OPENSSL_NO_ENGINE 178 setup_engine(bio_err, engine, 0); 179 #endif 180 181 app_RAND_load_file(NULL, bio_err, (inrand != NULL)); 182 if (inrand != NULL) 183 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 184 app_RAND_load_files(inrand)); 185 186 out = BIO_new(BIO_s_file()); 187 if (out == NULL) 188 goto err; 189 if (outfile != NULL) 190 r = BIO_write_filename(out, outfile); 191 else 192 { 193 r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT); 194 #ifdef OPENSSL_SYS_VMS 195 { 196 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 197 out = BIO_push(tmpbio, out); 198 } 199 #endif 200 } 201 if (r <= 0) 202 goto err; 203 204 if (base64) 205 { 206 BIO *b64 = BIO_new(BIO_f_base64()); 207 if (b64 == NULL) 208 goto err; 209 out = BIO_push(b64, out); 210 } 211 212 while (num > 0) 213 { 214 unsigned char buf[4096]; 215 int chunk; 216 217 chunk = num; 218 if (chunk > (int)sizeof(buf)) 219 chunk = sizeof buf; 220 r = RAND_bytes(buf, chunk); 221 if (r <= 0) 222 goto err; 223 if (!hex) 224 BIO_write(out, buf, chunk); 225 else 226 { 227 for (i = 0; i < chunk; i++) 228 BIO_printf(out, "%02x", buf[i]); 229 } 230 num -= chunk; 231 } 232 if (hex) 233 BIO_puts(out, "\n"); 234 (void)BIO_flush(out); 235 236 app_RAND_write_file(NULL, bio_err); 237 ret = 0; 238 239 err: 240 ERR_print_errors(bio_err); 241 if (out) 242 BIO_free_all(out); 243 apps_shutdown(); 244 OPENSSL_EXIT(ret); 245 } 246