mirror of
https://github.com/php/php-src.git
synced 2024-09-21 09:57:23 +00:00
65 lines
2.6 KiB
C
65 lines
2.6 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) The PHP Group |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 3.01 of the PHP license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| https://www.php.net/license/3_01.txt |
|
|
| If you did not receive a copy of the PHP license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@php.net so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: Arnaud Le Blanc <arnaud.lb@gmail.com> |
|
|
| Tim Düsterhus <timwolla@php.net> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include "php_random_zend_utils.h"
|
|
|
|
ZEND_ATTRIBUTE_NONNULL PHPAPI void php_random_bytes_insecure_for_zend(
|
|
zend_random_bytes_insecure_state *opaque_state, void *bytes, size_t size)
|
|
{
|
|
php_random_bytes_insecure_state_for_zend *state = (php_random_bytes_insecure_state_for_zend*) opaque_state;
|
|
|
|
if (UNEXPECTED(!state->initialized)) {
|
|
uint64_t t[4];
|
|
php_random_fallback_seed_state fallback_state;
|
|
fallback_state.initialized = false;
|
|
|
|
do {
|
|
/* Skip the CSPRNG if it has already failed */
|
|
if (!fallback_state.initialized) {
|
|
char errstr[128];
|
|
if (php_random_bytes_ex(&t, sizeof(t), errstr, sizeof(errstr)) == FAILURE) {
|
|
#if ZEND_DEBUG
|
|
fprintf(stderr, "php_random_bytes_ex: Failed to generate a random seed: %s\n", errstr);
|
|
#endif
|
|
goto fallback;
|
|
}
|
|
} else {
|
|
fallback:
|
|
t[0] = php_random_generate_fallback_seed_ex(&fallback_state);
|
|
t[1] = php_random_generate_fallback_seed_ex(&fallback_state);
|
|
t[2] = php_random_generate_fallback_seed_ex(&fallback_state);
|
|
t[3] = php_random_generate_fallback_seed_ex(&fallback_state);
|
|
}
|
|
} while (UNEXPECTED(t[0] == 0 && t[1] == 0 && t[2] == 0 && t[3] == 0));
|
|
|
|
php_random_xoshiro256starstar_seed256(&state->xoshiro256starstar_state, t[0], t[1], t[2], t[3]);
|
|
state->initialized = true;
|
|
}
|
|
|
|
while (size > 0) {
|
|
php_random_result result = php_random_algo_xoshiro256starstar.generate(&state->xoshiro256starstar_state);
|
|
ZEND_ASSERT(result.size == 8 && sizeof(result.result) == 8);
|
|
size_t chunk_size = MIN(size, 8);
|
|
bytes = zend_mempcpy(bytes, &result.result, chunk_size);
|
|
size -= chunk_size;
|
|
}
|
|
}
|