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(void * state)24 static php_random_result generate(void *state)
25 {
26 php_random_status_state_user *s = 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 (php_random_result){
35 .size = sizeof(uint64_t),
36 .result = 0,
37 };
38 }
39
40 size = Z_STRLEN(retval);
41
42 /* Guard for over 64-bit results */
43 if (size > sizeof(uint64_t)) {
44 size = sizeof(uint64_t);
45 }
46
47 if (size > 0) {
48 /* Endianness safe copy */
49 for (size_t i = 0; i < size; i++) {
50 result += ((uint64_t) (unsigned char) Z_STRVAL(retval)[i]) << (8 * i);
51 }
52 } else {
53 zend_throw_error(random_ce_Random_BrokenRandomEngineError, "A random engine must return a non-empty string");
54 return (php_random_result){
55 .size = sizeof(uint64_t),
56 .result = 0,
57 };
58 }
59
60 zval_ptr_dtor(&retval);
61
62 return (php_random_result){
63 .size = size,
64 .result = result,
65 };
66 }
67
range(void * state,zend_long min,zend_long max)68 static zend_long range(void *state, zend_long min, zend_long max)
69 {
70 return php_random_range((php_random_algo_with_state){
71 .algo = &php_random_algo_user,
72 .state = state,
73 }, min, max);
74 }
75
76 const php_random_algo php_random_algo_user = {
77 sizeof(php_random_status_state_user),
78 generate,
79 range,
80 NULL,
81 NULL,
82 };
83
