888db7f224
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Tim Hudson <tjh@openssl.org> Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/1079)
115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "apps.h"
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#include <openssl/bio.h>
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#include <openssl/rand.h>
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static int seeded = 0;
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static int egdsocket = 0;
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int app_RAND_load_file(const char *file, int dont_warn)
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{
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int consider_randfile = (file == NULL);
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char buffer[200];
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if (file == NULL)
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file = RAND_file_name(buffer, sizeof buffer);
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#ifndef OPENSSL_NO_EGD
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else if (RAND_egd(file) > 0) {
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/*
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* we try if the given filename is an EGD socket. if it is, we don't
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* write anything back to the file.
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*/
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egdsocket = 1;
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return 1;
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}
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#endif
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if (file == NULL || !RAND_load_file(file, -1)) {
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if (RAND_status() == 0) {
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if (!dont_warn) {
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BIO_printf(bio_err, "unable to load 'random state'\n");
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BIO_printf(bio_err,
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"This means that the random number generator has not been seeded\n");
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BIO_printf(bio_err, "with much random data.\n");
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if (consider_randfile) { /* explanation does not apply when a
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* file is explicitly named */
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BIO_printf(bio_err,
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"Consider setting the RANDFILE environment variable to point at a file that\n");
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BIO_printf(bio_err,
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"'random' data can be kept in (the file will be overwritten).\n");
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}
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}
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return 0;
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}
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}
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seeded = 1;
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return 1;
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}
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long app_RAND_load_files(char *name)
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{
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char *p, *n;
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int last;
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long tot = 0;
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#ifndef OPENSSL_NO_EGD
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int egd;
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#endif
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for (;;) {
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last = 0;
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for (p = name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++) ;
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if (*p == '\0')
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last = 1;
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*p = '\0';
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n = name;
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name = p + 1;
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if (*n == '\0')
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break;
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#ifndef OPENSSL_NO_EGD
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egd = RAND_egd(n);
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if (egd > 0)
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tot += egd;
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else
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#endif
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tot += RAND_load_file(n, -1);
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if (last)
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break;
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}
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if (tot > 512)
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app_RAND_allow_write_file();
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return (tot);
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}
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int app_RAND_write_file(const char *file)
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{
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char buffer[200];
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if (egdsocket || !seeded)
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/*
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* If we did not manage to read the seed file, we should not write a
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* low-entropy seed file back -- it would suppress a crucial warning
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* the next time we want to use it.
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*/
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return 0;
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if (file == NULL)
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file = RAND_file_name(buffer, sizeof buffer);
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if (file == NULL || !RAND_write_file(file)) {
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BIO_printf(bio_err, "unable to write 'random state'\n");
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return 0;
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}
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return 1;
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}
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void app_RAND_allow_write_file(void)
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{
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seeded = 1;
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}
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