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Diffstat (limited to 'openssl/apps/app_rand.c')
| -rw-r--r-- | openssl/apps/app_rand.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/openssl/apps/app_rand.c b/openssl/apps/app_rand.c new file mode 100644 index 00000000..b7b6128c --- /dev/null +++ b/openssl/apps/app_rand.c @@ -0,0 +1,218 @@ +/* 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; + } |