Viewing file:  app_rand.c (2.98 KB) -rw-r--r--
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/*
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/conf.h>
static char *save_rand_file;
static STACK_OF(OPENSSL_STRING) *randfiles;
void app_RAND_load_conf(CONF *c, const char *section)
{
const char *randfile = NCONF_get_string(c, section, "RANDFILE");
if (randfile == NULL) {
ERR_clear_error();
return;
}
if (RAND_load_file(randfile, -1) < 0) {
BIO_printf(bio_err, "Can't load %s into RNG\n", randfile);
ERR_print_errors(bio_err);
}
if (save_rand_file == NULL) {
save_rand_file = OPENSSL_strdup(randfile);
/* If some internal memory errors have occurred */
if (save_rand_file == NULL) {
BIO_printf(bio_err, "Can't duplicate %s\n", randfile);
ERR_print_errors(bio_err);
}
}
}
static int loadfiles(char *name)
{
char *p;
int last, ret = 1;
for (;;) {
last = 0;
for (p = name; *p != '\0' && *p != LIST_SEPARATOR_CHAR; p++)
continue;
if (*p == '\0')
last = 1;
*p = '\0';
if (RAND_load_file(name, -1) < 0) {
BIO_printf(bio_err, "Can't load %s into RNG\n", name);
ERR_print_errors(bio_err);
ret = 0;
}
if (last)
break;
name = p + 1;
if (*name == '\0')
break;
}
return ret;
}
int app_RAND_load(void)
{
char *p;
int i, ret = 1;
for (i = 0; i < sk_OPENSSL_STRING_num(randfiles); i++) {
p = sk_OPENSSL_STRING_value(randfiles, i);
if (!loadfiles(p))
ret = 0;
}
sk_OPENSSL_STRING_free(randfiles);
return ret;
}
int app_RAND_write(void)
{
int ret = 1;
if (save_rand_file == NULL)
return 1;
if (RAND_write_file(save_rand_file) == -1) {
BIO_printf(bio_err, "Cannot write random bytes:\n");
ERR_print_errors(bio_err);
ret = 0;
}
OPENSSL_free(save_rand_file);
save_rand_file = NULL;
return ret;
}
/*
* See comments in opt_verify for explanation of this.
*/
enum r_range { OPT_R_ENUM };
int opt_rand(int opt)
{
switch ((enum r_range)opt) {
case OPT_R__FIRST:
case OPT_R__LAST:
break;
case OPT_R_RAND:
if (randfiles == NULL
&& (randfiles = sk_OPENSSL_STRING_new_null()) == NULL)
return 0;
if (!sk_OPENSSL_STRING_push(randfiles, opt_arg()))
return 0;
break;
case OPT_R_WRITERAND:
OPENSSL_free(save_rand_file);
save_rand_file = OPENSSL_strdup(opt_arg());
if (save_rand_file == NULL)
return 0;
break;
}
return 1;
}
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