| /* apps/app_rand.c */ |
| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] |
| */ |
| /* ==================================================================== |
| * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| * |
| * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * openssl-core@openssl.org. |
| * |
| * 5. Products derived from this software may not be called "OpenSSL" |
| * nor may "OpenSSL" appear in their names without prior written |
| * permission of the OpenSSL Project. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This product includes cryptographic software written by Eric Young |
| * (eay@cryptsoft.com). This product includes software written by Tim |
| * Hudson (tjh@cryptsoft.com). |
| * |
| */ |
| |
| #define NON_MAIN |
| #include "apps.h" |
| #undef NON_MAIN |
| #include <openssl/bio.h> |
| #include <openssl/rand.h> |
| |
| static int seeded = 0; |
| static int egdsocket = 0; |
| |
| int app_RAND_load_file(const char *file, BIO *bio_e, int dont_warn) |
| { |
| int consider_randfile = (file == NULL); |
| char buffer[200]; |
| |
| #ifdef OPENSSL_SYS_WINDOWS |
| BIO_printf(bio_e, "Loading 'screen' into random state -"); |
| BIO_flush(bio_e); |
| RAND_screen(); |
| BIO_printf(bio_e, " done\n"); |
| #endif |
| |
| if (file == NULL) |
| file = RAND_file_name(buffer, sizeof buffer); |
| else if (RAND_egd(file) > 0) { |
| /* |
| * we try if the given filename is an EGD socket. if it is, we don't |
| * write anything back to the file. |
| */ |
| egdsocket = 1; |
| return 1; |
| } |
| if (file == NULL || !RAND_load_file(file, -1)) { |
| if (RAND_status() == 0) { |
| if (!dont_warn) { |
| BIO_printf(bio_e, "unable to load 'random state'\n"); |
| BIO_printf(bio_e, |
| "This means that the random number generator has not been seeded\n"); |
| BIO_printf(bio_e, "with much random data.\n"); |
| if (consider_randfile) { /* explanation does not apply when a |
| * file is explicitly named */ |
| BIO_printf(bio_e, |
| "Consider setting the RANDFILE environment variable to point at a file that\n"); |
| BIO_printf(bio_e, |
| "'random' data can be kept in (the file will be overwritten).\n"); |
| } |
| } |
| return 0; |
| } |
| } |
| seeded = 1; |
| return 1; |
| } |
| |
| long app_RAND_load_files(char *name) |
| { |
| char *p, *n; |
| int last; |
| long tot = 0; |
| int egd; |
| |
| for (;;) { |
| last = 0; |
| for (p = name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++) ; |
| if (*p == '\0') |
| last = 1; |
| *p = '\0'; |
| n = name; |
| name = p + 1; |
| if (*n == '\0') |
| break; |
| |
| egd = RAND_egd(n); |
| if (egd > 0) |
| tot += egd; |
| else |
| tot += RAND_load_file(n, -1); |
| if (last) |
| break; |
| } |
| if (tot > 512) |
| app_RAND_allow_write_file(); |
| return (tot); |
| } |
| |
| int app_RAND_write_file(const char *file, BIO *bio_e) |
| { |
| char buffer[200]; |
| |
| if (egdsocket || !seeded) |
| /* |
| * If we did not manage to read the seed file, we should not write a |
| * low-entropy seed file back -- it would suppress a crucial warning |
| * the next time we want to use it. |
| */ |
| return 0; |
| |
| if (file == NULL) |
| file = RAND_file_name(buffer, sizeof buffer); |
| if (file == NULL || !RAND_write_file(file)) { |
| BIO_printf(bio_e, "unable to write 'random state'\n"); |
| return 0; |
| } |
| return 1; |
| } |
| |
| void app_RAND_allow_write_file(void) |
| { |
| seeded = 1; |
| } |