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