/src/php-src/ext/random/engine_user.c
Line | Count | Source |
1 | | /* |
2 | | +----------------------------------------------------------------------+ |
3 | | | Copyright © The PHP Group and Contributors. | |
4 | | +----------------------------------------------------------------------+ |
5 | | | This source file is subject to the Modified BSD License that is | |
6 | | | bundled with this package in the file LICENSE, and is available | |
7 | | | through the World Wide Web at <https://www.php.net/license/>. | |
8 | | | | |
9 | | | SPDX-License-Identifier: BSD-3-Clause | |
10 | | +----------------------------------------------------------------------+ |
11 | | | Author: Go Kudo <zeriyoshi@php.net> | |
12 | | +----------------------------------------------------------------------+ |
13 | | */ |
14 | | |
15 | | #ifdef HAVE_CONFIG_H |
16 | | # include "config.h" |
17 | | #endif |
18 | | |
19 | | #include "php.h" |
20 | | #include "php_random.h" |
21 | | |
22 | | static php_random_result generate(void *state) |
23 | 0 | { |
24 | 0 | php_random_status_state_user *s = state; |
25 | 0 | uint64_t result = 0; |
26 | 0 | size_t size; |
27 | 0 | zval retval; |
28 | 0 | zend_string *zstr; |
29 | |
|
30 | 0 | zend_call_known_instance_method_with_0_params(s->generate_method, s->object, &retval); |
31 | |
|
32 | 0 | if (EG(exception)) { |
33 | 0 | return (php_random_result){ |
34 | 0 | .size = sizeof(uint64_t), |
35 | 0 | .result = 0, |
36 | 0 | }; |
37 | 0 | } |
38 | | |
39 | 0 | if (UNEXPECTED(Z_ISREF(retval))) { |
40 | 0 | zstr = Z_STR_P(Z_REFVAL(retval)); |
41 | 0 | } else { |
42 | 0 | zstr = Z_STR(retval); |
43 | 0 | } |
44 | | |
45 | | /* Store generated size in a state */ |
46 | 0 | size = ZSTR_LEN(zstr); |
47 | | |
48 | | /* Guard for over 64-bit results */ |
49 | 0 | if (size > sizeof(uint64_t)) { |
50 | 0 | size = sizeof(uint64_t); |
51 | 0 | } |
52 | |
|
53 | 0 | if (size > 0) { |
54 | | /* Endianness safe copy */ |
55 | 0 | for (size_t i = 0; i < size; i++) { |
56 | 0 | result += ((uint64_t) (unsigned char) ZSTR_VAL(zstr)[i]) << (8 * i); |
57 | 0 | } |
58 | 0 | } else { |
59 | 0 | zend_throw_error(random_ce_Random_BrokenRandomEngineError, "A random engine must return a non-empty string"); |
60 | 0 | zval_ptr_dtor(&retval); |
61 | 0 | return (php_random_result){ |
62 | 0 | .size = sizeof(uint64_t), |
63 | 0 | .result = 0, |
64 | 0 | }; |
65 | 0 | } |
66 | | |
67 | 0 | zval_ptr_dtor(&retval); |
68 | |
|
69 | 0 | return (php_random_result){ |
70 | 0 | .size = size, |
71 | 0 | .result = result, |
72 | 0 | }; |
73 | 0 | } |
74 | | |
75 | | static zend_long range(void *state, zend_long min, zend_long max) |
76 | 0 | { |
77 | 0 | return php_random_range((php_random_algo_with_state){ |
78 | 0 | .algo = &php_random_algo_user, |
79 | 0 | .state = state, |
80 | 0 | }, min, max); |
81 | 0 | } |
82 | | |
83 | | PHPAPI const php_random_algo php_random_algo_user = { |
84 | | sizeof(php_random_status_state_user), |
85 | | generate, |
86 | | range, |
87 | | NULL, |
88 | | NULL, |
89 | | }; |