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 /*- 70 * -out file - write to file 71 * -rand file:file - PRNG seed files 72 * -base64 - base64 encode output 73 * -hex - hex encode output 74 * num - write 'num' bytes 75 */ 76 77 int MAIN(int, char **); 78 79 int MAIN(int argc, char **argv) 80 { 81 int i, r, ret = 1; 82 int badopt; 83 char *outfile = NULL; 84 char *inrand = NULL; 85 int base64 = 0; 86 int hex = 0; 87 BIO *out = NULL; 88 int num = -1; 89 ENGINE *e = NULL; 90 char *engine = NULL; 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 if (strcmp(argv[i], "-out") == 0) { 105 if ((argv[i + 1] != NULL) && (outfile == NULL)) 106 outfile = argv[++i]; 107 else 108 badopt = 1; 109 } 110 #ifndef OPENSSL_NO_ENGINE 111 else if (strcmp(argv[i], "-engine") == 0) { 112 if ((argv[i + 1] != NULL) && (engine == NULL)) 113 engine = argv[++i]; 114 else 115 badopt = 1; 116 } 117 #endif 118 else if (strcmp(argv[i], "-rand") == 0) { 119 if ((argv[i + 1] != NULL) && (inrand == NULL)) 120 inrand = argv[++i]; 121 else 122 badopt = 1; 123 } else if (strcmp(argv[i], "-base64") == 0) { 124 if (!base64) 125 base64 = 1; 126 else 127 badopt = 1; 128 } else if (strcmp(argv[i], "-hex") == 0) { 129 if (!hex) 130 hex = 1; 131 else 132 badopt = 1; 133 } else if (isdigit((unsigned char)argv[i][0])) { 134 if (num < 0) { 135 r = sscanf(argv[i], "%d", &num); 136 if (r == 0 || num < 0) 137 badopt = 1; 138 } else 139 badopt = 1; 140 } else 141 badopt = 1; 142 } 143 144 if (hex && base64) 145 badopt = 1; 146 147 if (num < 0) 148 badopt = 1; 149 150 if (badopt) { 151 BIO_printf(bio_err, "Usage: rand [options] num\n"); 152 BIO_printf(bio_err, "where options are\n"); 153 BIO_printf(bio_err, "-out file - write to file\n"); 154 #ifndef OPENSSL_NO_ENGINE 155 BIO_printf(bio_err, 156 "-engine e - use engine e, possibly a hardware device.\n"); 157 #endif 158 BIO_printf(bio_err, "-rand file%cfile%c... - seed PRNG from files\n", 159 LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 160 BIO_printf(bio_err, "-base64 - base64 encode output\n"); 161 BIO_printf(bio_err, "-hex - hex encode output\n"); 162 goto err; 163 } 164 e = setup_engine(bio_err, engine, 0); 165 166 app_RAND_load_file(NULL, bio_err, (inrand != NULL)); 167 if (inrand != NULL) 168 BIO_printf(bio_err, "%ld semi-random bytes loaded\n", 169 app_RAND_load_files(inrand)); 170 171 out = BIO_new(BIO_s_file()); 172 if (out == NULL) 173 goto err; 174 if (outfile != NULL) 175 r = BIO_write_filename(out, outfile); 176 else { 177 r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT); 178 #ifdef OPENSSL_SYS_VMS 179 { 180 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 181 out = BIO_push(tmpbio, out); 182 } 183 #endif 184 } 185 if (r <= 0) 186 goto err; 187 188 if (base64) { 189 BIO *b64 = BIO_new(BIO_f_base64()); 190 if (b64 == NULL) 191 goto err; 192 out = BIO_push(b64, out); 193 } 194 195 while (num > 0) { 196 unsigned char buf[4096]; 197 int chunk; 198 199 chunk = num; 200 if (chunk > (int)sizeof(buf)) 201 chunk = sizeof(buf); 202 r = RAND_bytes(buf, chunk); 203 if (r <= 0) 204 goto err; 205 if (!hex) 206 BIO_write(out, buf, chunk); 207 else { 208 for (i = 0; i < chunk; i++) 209 BIO_printf(out, "%02x", buf[i]); 210 } 211 num -= chunk; 212 } 213 if (hex) 214 BIO_puts(out, "\n"); 215 (void)BIO_flush(out); 216 217 app_RAND_write_file(NULL, bio_err); 218 ret = 0; 219 220 err: 221 ERR_print_errors(bio_err); 222 release_engine(e); 223 if (out) 224 BIO_free_all(out); 225 apps_shutdown(); 226 OPENSSL_EXIT(ret); 227 } 228