1 /*
2 +----------------------------------------------------------------------+
3 | Copyright (c) The PHP Group |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | https://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Author: Go Kudo <zeriyoshi@php.net> |
14 +----------------------------------------------------------------------+
15 */
16
17 #ifdef HAVE_CONFIG_H
18 # include "config.h"
19 #endif
20
21 #include "php.h"
22 #include "php_random.h"
23
generate(php_random_status * status)24 static uint64_t generate(php_random_status *status)
25 {
26 php_random_status_state_user *s = status->state;
27 uint64_t result = 0;
28 size_t size;
29 zval retval;
30
31 zend_call_known_instance_method_with_0_params(s->generate_method, s->object, &retval);
32
33 if (EG(exception)) {
34 return 0;
35 }
36
37 /* Store generated size in a state */
38 size = Z_STRLEN(retval);
39
40 /* Guard for over 64-bit results */
41 if (size > sizeof(uint64_t)) {
42 size = sizeof(uint64_t);
43 }
44 status->last_generated_size = size;
45
46 if (size > 0) {
47 /* Endianness safe copy */
48 for (size_t i = 0; i < size; i++) {
49 result += ((uint64_t) (unsigned char) Z_STRVAL(retval)[i]) << (8 * i);
50 }
51 } else {
52 zend_throw_error(random_ce_Random_BrokenRandomEngineError, "A random engine must return a non-empty string");
53 return 0;
54 }
55
56 zval_ptr_dtor(&retval);
57
58 return result;
59 }
60
range(php_random_status * status,zend_long min,zend_long max)61 static zend_long range(php_random_status *status, zend_long min, zend_long max)
62 {
63 return php_random_range(&php_random_algo_user, status, min, max);
64 }
65
66 const php_random_algo php_random_algo_user = {
67 0,
68 sizeof(php_random_status_state_user),
69 NULL,
70 generate,
71 range,
72 NULL,
73 NULL,
74 };
75
