app_rand.c revision 280304
167754Smsmith/* apps/app_rand.c */ 267754Smsmith/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 367754Smsmith * All rights reserved. 4138287Smarks * 567754Smsmith * This package is an SSL implementation written 667754Smsmith * by Eric Young (eay@cryptsoft.com). 767754Smsmith * The implementation was written so as to conform with Netscapes SSL. 867754Smsmith * 967754Smsmith * This library is free for commercial and non-commercial use as long as 1067754Smsmith * the following conditions are aheared to. The following conditions 1167754Smsmith * apply to all code found in this distribution, be it the RC4, RSA, 12126372Snjl * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1370243Smsmith * included with this distribution is covered by the same copyright terms 1467754Smsmith * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1567754Smsmith * 1667754Smsmith * Copyright remains Eric Young's, and as such any Copyright notices in 1767754Smsmith * the code are not to be removed. 1867754Smsmith * If this package is used in a product, Eric Young should be given attribution 1967754Smsmith * as the author of the parts of the library used. 2067754Smsmith * This can be in the form of a textual message at program startup or 2167754Smsmith * in documentation (online or textual) provided with the package. 2267754Smsmith * 2367754Smsmith * Redistribution and use in source and binary forms, with or without 2467754Smsmith * modification, are permitted provided that the following conditions 2567754Smsmith * are met: 2667754Smsmith * 1. Redistributions of source code must retain the copyright 2767754Smsmith * notice, this list of conditions and the following disclaimer. 2867754Smsmith * 2. Redistributions in binary form must reproduce the above copyright 2967754Smsmith * notice, this list of conditions and the following disclaimer in the 3067754Smsmith * documentation and/or other materials provided with the distribution. 3167754Smsmith * 3. All advertising materials mentioning features or use of this software 3267754Smsmith * must display the following acknowledgement: 3367754Smsmith * "This product includes cryptographic software written by 3467754Smsmith * Eric Young (eay@cryptsoft.com)" 3567754Smsmith * The word 'cryptographic' can be left out if the rouines from the library 3667754Smsmith * being used are not cryptographic related :-). 3767754Smsmith * 4. If you include any Windows specific code (or a derivative thereof) from 3867754Smsmith * the apps directory (application code) you must include an acknowledgement: 3967754Smsmith * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4067754Smsmith * 4167754Smsmith * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4267754Smsmith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4367754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4467754Smsmith * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4567754Smsmith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4667754Smsmith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4767754Smsmith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4867754Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4967754Smsmith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5067754Smsmith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5167754Smsmith * SUCH DAMAGE. 5267754Smsmith * 5367754Smsmith * The licence and distribution terms for any publically available version or 5467754Smsmith * derivative of this code cannot be changed. i.e. this code cannot simply be 5567754Smsmith * copied and put under another distribution licence 5667754Smsmith * [including the GNU Public Licence.] 5767754Smsmith */ 5867754Smsmith/* ==================================================================== 5967754Smsmith * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. 6067754Smsmith * 6167754Smsmith * Redistribution and use in source and binary forms, with or without 6267754Smsmith * modification, are permitted provided that the following conditions 6367754Smsmith * are met: 6467754Smsmith * 6567754Smsmith * 1. Redistributions of source code must retain the above copyright 6667754Smsmith * notice, this list of conditions and the following disclaimer. 6767754Smsmith * 6867754Smsmith * 2. Redistributions in binary form must reproduce the above copyright 6967754Smsmith * notice, this list of conditions and the following disclaimer in 7067754Smsmith * the documentation and/or other materials provided with the 7167754Smsmith * distribution. 7267754Smsmith * 7367754Smsmith * 3. All advertising materials mentioning features or use of this 7467754Smsmith * software must display the following acknowledgment: 7567754Smsmith * "This product includes software developed by the OpenSSL Project 7667754Smsmith * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 7767754Smsmith * 7867754Smsmith * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 7967754Smsmith * endorse or promote products derived from this software without 8067754Smsmith * prior written permission. For written permission, please contact 8167754Smsmith * openssl-core@openssl.org. 8267754Smsmith * 8367754Smsmith * 5. Products derived from this software may not be called "OpenSSL" 8467754Smsmith * nor may "OpenSSL" appear in their names without prior written 8567754Smsmith * permission of the OpenSSL Project. 8667754Smsmith * 8767754Smsmith * 6. Redistributions of any form whatsoever must retain the following 8867754Smsmith * acknowledgment: 8967754Smsmith * "This product includes software developed by the OpenSSL Project 9067754Smsmith * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 9167754Smsmith * 9267754Smsmith * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 9367754Smsmith * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 9467754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 9567754Smsmith * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 9667754Smsmith * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 9767754Smsmith * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 9867754Smsmith * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 9967754Smsmith * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 10067754Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 10167754Smsmith * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 10267754Smsmith * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 10367754Smsmith * OF THE POSSIBILITY OF SUCH DAMAGE. 10467754Smsmith * ==================================================================== 10567754Smsmith * 10667754Smsmith * This product includes cryptographic software written by Eric Young 10767754Smsmith * (eay@cryptsoft.com). This product includes software written by Tim 10867754Smsmith * Hudson (tjh@cryptsoft.com). 10967754Smsmith * 11067754Smsmith */ 11167754Smsmith 11267754Smsmith#define NON_MAIN 11367754Smsmith#include "apps.h" 11467754Smsmith#undef NON_MAIN 11567754Smsmith#include <openssl/bio.h> 11667754Smsmith#include <openssl/rand.h> 11767754Smsmith 11867754Smsmithstatic int seeded = 0; 11967754Smsmithstatic int egdsocket = 0; 120151600Sobrien 121151600Sobrienint app_RAND_load_file(const char *file, BIO *bio_e, int dont_warn) 122151600Sobrien{ 12367754Smsmith int consider_randfile = (file == NULL); 12467754Smsmith char buffer[200]; 12577424Smsmith 12691116Smsmith#ifdef OPENSSL_SYS_WINDOWS 12767754Smsmith BIO_printf(bio_e, "Loading 'screen' into random state -"); 128123315Snjl BIO_flush(bio_e); 129102550Siwasaki RAND_screen(); 13067754Smsmith BIO_printf(bio_e, " done\n"); 13177424Smsmith#endif 13267754Smsmith 13387031Smsmith if (file == NULL) 13487031Smsmith file = RAND_file_name(buffer, sizeof buffer); 13587031Smsmith else if (RAND_egd(file) > 0) { 13687031Smsmith /* 13787031Smsmith * we try if the given filename is an EGD socket. if it is, we don't 13887031Smsmith * write anything back to the file. 13987031Smsmith */ 14087031Smsmith egdsocket = 1; 14187031Smsmith return 1; 14287031Smsmith } 14387031Smsmith if (file == NULL || !RAND_load_file(file, -1)) { 14487031Smsmith if (RAND_status() == 0) { 14587031Smsmith if (!dont_warn) { 14687031Smsmith BIO_printf(bio_e, "unable to load 'random state'\n"); 14799146Siwasaki BIO_printf(bio_e, 14887031Smsmith "This means that the random number generator has not been seeded\n"); 14987031Smsmith BIO_printf(bio_e, "with much random data.\n"); 15087031Smsmith if (consider_randfile) { /* explanation does not apply when a 15187031Smsmith * file is explicitly named */ 15287031Smsmith BIO_printf(bio_e, 15387031Smsmith "Consider setting the RANDFILE environment variable to point at a file that\n"); 15487031Smsmith BIO_printf(bio_e, 155123315Snjl "'random' data can be kept in (the file will be overwritten).\n"); 15687031Smsmith } 15787031Smsmith } 15887031Smsmith return 0; 15991116Smsmith } 16087031Smsmith } 16191116Smsmith seeded = 1; 16291116Smsmith return 1; 16391116Smsmith} 16491116Smsmith 16591116Smsmithlong app_RAND_load_files(char *name) 16691116Smsmith{ 16791116Smsmith char *p, *n; 16891116Smsmith int last; 16987031Smsmith long tot = 0; 17087031Smsmith int egd; 17187031Smsmith 17287031Smsmith for (;;) { 17387031Smsmith last = 0; 17487031Smsmith for (p = name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++) ; 17587031Smsmith if (*p == '\0') 17687031Smsmith last = 1; 17767754Smsmith *p = '\0'; 17867754Smsmith n = name; 17967754Smsmith name = p + 1; 18067754Smsmith if (*n == '\0') 18167754Smsmith break; 18267754Smsmith 18367754Smsmith egd = RAND_egd(n); 18467754Smsmith if (egd > 0) 18567754Smsmith tot += egd; 18667754Smsmith else 18777424Smsmith tot += RAND_load_file(n, -1); 18867754Smsmith if (last) 189114237Snjl break; 19067754Smsmith } 19167754Smsmith if (tot > 512) 192114237Snjl app_RAND_allow_write_file(); 19367754Smsmith return (tot); 19467754Smsmith} 19567754Smsmith 19667754Smsmithint app_RAND_write_file(const char *file, BIO *bio_e) 19791116Smsmith{ 19867754Smsmith char buffer[200]; 19983174Smsmith 20067754Smsmith if (egdsocket || !seeded) 20167754Smsmith /* 20267754Smsmith * If we did not manage to read the seed file, we should not write a 20367754Smsmith * low-entropy seed file back -- it would suppress a crucial warning 204114237Snjl * the next time we want to use it. 20567754Smsmith */ 20667754Smsmith return 0; 20767754Smsmith 20867754Smsmith if (file == NULL) 209114237Snjl file = RAND_file_name(buffer, sizeof buffer); 210114237Snjl if (file == NULL || !RAND_write_file(file)) { 211114237Snjl BIO_printf(bio_e, "unable to write 'random state'\n"); 21267754Smsmith return 0; 21367754Smsmith } 21467754Smsmith return 1; 21577424Smsmith} 21667754Smsmith 21767754Smsmithvoid app_RAND_allow_write_file(void) 21867754Smsmith{ 21967754Smsmith seeded = 1; 22067754Smsmith} 22167754Smsmith