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 - encode output 72 * num - write 'num' bytes 73 */ 74 75 int MAIN(int, char **); 76 77 int MAIN(int argc, char **argv) 78 { 79 #ifndef OPENSSL_NO_ENGINE 80 ENGINE *e = NULL; 81 #endif 82 int i, r, ret = 1; 83 int badopt; 84 char *outfile = NULL; 85 char *inrand = NULL; 86 int base64 = 0; 87 BIO *out = NULL; 88 int num = -1; 89 #ifndef OPENSSL_NO_ENGINE 90 char *engine=NULL; 91 #endif 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 99 if (!load_config(bio_err, NULL)) 100 goto err; 101 102 badopt = 0; 103 i = 0; 104 while (!badopt && argv[++i] != NULL) 105 { 106 if (strcmp(argv[i], "-out") == 0) 107 { 108 if ((argv[i+1] != NULL) && (outfile == NULL)) 109 outfile = argv[++i]; 110 else 111 badopt = 1; 112 } 113 #ifndef OPENSSL_NO_ENGINE 114 else if (strcmp(argv[i], "-engine") == 0) 115 { 116 if ((argv[i+1] != NULL) && (engine == NULL)) 117 engine = argv[++i]; 118 else 119 badopt = 1; 120 } 121 #endif 122 else if (strcmp(argv[i], "-rand") == 0) 123 { 124 if ((argv[i+1] != NULL) && (inrand == NULL)) 125 inrand = argv[++i]; 126 else 127 badopt = 1; 128 } 129 else if (strcmp(argv[i], "-base64") == 0) 130 { 131 if (!base64) 132 base64 = 1; 133 else 134 badopt = 1; 135 } 136 else if (isdigit((unsigned char)argv[i][0])) 137 { 138 if (num < 0) 139 { 140 r = sscanf(argv[i], "%d", &num); 141 if (r == 0 || num < 0) 142 badopt = 1; 143 } 144 else 145 badopt = 1; 146 } 147 else 148 badopt = 1; 149 } 150 151 if (num < 0) 152 badopt = 1; 153 154 if (badopt) 155 { 156 BIO_printf(bio_err, "Usage: rand [options] num\n"); 157 BIO_printf(bio_err, "where options are\n"); 158 BIO_printf(bio_err, "-out file - write to file\n"); 159 #ifndef OPENSSL_NO_ENGINE 160 BIO_printf(bio_err, "-engine e - use engine e, possibly a hardware device.\n"); 161 #endif 162 BIO_printf(bio_err, "-rand file%cfile%c... - seed PRNG from files\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 163 BIO_printf(bio_err, "-base64 - encode output\n"); 164 goto err; 165 } 166 167 #ifndef OPENSSL_NO_ENGINE 168 e = setup_engine(bio_err, engine, 0); 169 #endif 170 171 app_RAND_load_file(NULL, bio_err, (inrand != NULL)); 172 if (inrand != NULL) 173 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 174 app_RAND_load_files(inrand)); 175 176 out = BIO_new(BIO_s_file()); 177 if (out == NULL) 178 goto err; 179 if (outfile != NULL) 180 r = BIO_write_filename(out, outfile); 181 else 182 { 183 r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT); 184 #ifdef OPENSSL_SYS_VMS 185 { 186 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 187 out = BIO_push(tmpbio, out); 188 } 189 #endif 190 } 191 if (r <= 0) 192 goto err; 193 194 if (base64) 195 { 196 BIO *b64 = BIO_new(BIO_f_base64()); 197 if (b64 == NULL) 198 goto err; 199 out = BIO_push(b64, out); 200 } 201 202 while (num > 0) 203 { 204 unsigned char buf[4096]; 205 int chunk; 206 207 chunk = num; 208 if (chunk > (int)sizeof(buf)) 209 chunk = sizeof buf; 210 r = RAND_bytes(buf, chunk); 211 if (r <= 0) 212 goto err; 213 BIO_write(out, buf, chunk); 214 num -= chunk; 215 } 216 BIO_flush(out); 217 218 app_RAND_write_file(NULL, bio_err); 219 ret = 0; 220 221 err: 222 ERR_print_errors(bio_err); 223 if (out) 224 BIO_free_all(out); 225 apps_shutdown(); 226 OPENSSL_EXIT(ret); 227 } 228