rand.c revision e45f106cb6b47af1f21efe76e933bdea2f5dd1ca
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 76int MAIN(int, char **); 77 78int MAIN(int argc, char **argv) 79 { 80#ifndef OPENSSL_NO_ENGINE 81 ENGINE *e = NULL; 82#endif 83 int i, r, ret = 1; 84 int badopt; 85 char *outfile = NULL; 86 char *inrand = NULL; 87 int base64 = 0; 88 int hex = 0; 89 BIO *out = NULL; 90 int num = -1; 91#ifndef OPENSSL_NO_ENGINE 92 char *engine=NULL; 93#endif 94 95 apps_startup(); 96 97 if (bio_err == NULL) 98 if ((bio_err = BIO_new(BIO_s_file())) != NULL) 99 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT); 100 101 if (!load_config(bio_err, NULL)) 102 goto err; 103 104 badopt = 0; 105 i = 0; 106 while (!badopt && argv[++i] != NULL) 107 { 108 if (strcmp(argv[i], "-out") == 0) 109 { 110 if ((argv[i+1] != NULL) && (outfile == NULL)) 111 outfile = argv[++i]; 112 else 113 badopt = 1; 114 } 115#ifndef OPENSSL_NO_ENGINE 116 else if (strcmp(argv[i], "-engine") == 0) 117 { 118 if ((argv[i+1] != NULL) && (engine == NULL)) 119 engine = argv[++i]; 120 else 121 badopt = 1; 122 } 123#endif 124 else if (strcmp(argv[i], "-rand") == 0) 125 { 126 if ((argv[i+1] != NULL) && (inrand == NULL)) 127 inrand = argv[++i]; 128 else 129 badopt = 1; 130 } 131 else if (strcmp(argv[i], "-base64") == 0) 132 { 133 if (!base64) 134 base64 = 1; 135 else 136 badopt = 1; 137 } 138 else if (strcmp(argv[i], "-hex") == 0) 139 { 140 if (!hex) 141 hex = 1; 142 else 143 badopt = 1; 144 } 145 else if (isdigit((unsigned char)argv[i][0])) 146 { 147 if (num < 0) 148 { 149 r = sscanf(argv[i], "%d", &num); 150 if (r == 0 || num < 0) 151 badopt = 1; 152 } 153 else 154 badopt = 1; 155 } 156 else 157 badopt = 1; 158 } 159 160 if (hex && base64) 161 badopt = 1; 162 163 if (num < 0) 164 badopt = 1; 165 166 if (badopt) 167 { 168 BIO_printf(bio_err, "Usage: rand [options] num\n"); 169 BIO_printf(bio_err, "where options are\n"); 170 BIO_printf(bio_err, "-out file - write to file\n"); 171#ifndef OPENSSL_NO_ENGINE 172 BIO_printf(bio_err, "-engine e - use engine e, possibly a hardware device.\n"); 173#endif 174 BIO_printf(bio_err, "-rand file%cfile%c... - seed PRNG from files\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 175 BIO_printf(bio_err, "-base64 - base64 encode output\n"); 176 BIO_printf(bio_err, "-hex - hex encode output\n"); 177 goto err; 178 } 179 180#ifndef OPENSSL_NO_ENGINE 181 e = setup_engine(bio_err, engine, 0); 182#endif 183 184 app_RAND_load_file(NULL, bio_err, (inrand != NULL)); 185 if (inrand != NULL) 186 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 187 app_RAND_load_files(inrand)); 188 189 out = BIO_new(BIO_s_file()); 190 if (out == NULL) 191 goto err; 192 if (outfile != NULL) 193 r = BIO_write_filename(out, outfile); 194 else 195 { 196 r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT); 197#ifdef OPENSSL_SYS_VMS 198 { 199 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 200 out = BIO_push(tmpbio, out); 201 } 202#endif 203 } 204 if (r <= 0) 205 goto err; 206 207 if (base64) 208 { 209 BIO *b64 = BIO_new(BIO_f_base64()); 210 if (b64 == NULL) 211 goto err; 212 out = BIO_push(b64, out); 213 } 214 215 while (num > 0) 216 { 217 unsigned char buf[4096]; 218 int chunk; 219 220 chunk = num; 221 if (chunk > (int)sizeof(buf)) 222 chunk = sizeof buf; 223 r = RAND_bytes(buf, chunk); 224 if (r <= 0) 225 goto err; 226 if (!hex) 227 BIO_write(out, buf, chunk); 228 else 229 { 230 for (i = 0; i < chunk; i++) 231 BIO_printf(out, "%02x", buf[i]); 232 } 233 num -= chunk; 234 } 235 if (hex) 236 BIO_puts(out, "\n"); 237 (void)BIO_flush(out); 238 239 app_RAND_write_file(NULL, bio_err); 240 ret = 0; 241 242err: 243 ERR_print_errors(bio_err); 244 if (out) 245 BIO_free_all(out); 246 apps_shutdown(); 247 OPENSSL_EXIT(ret); 248 } 249