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 | Authors: Sammy Kaye Powers <sammyk@php.net> |
14 | Dmitry Stogov <dmitry@php.net> |
15 +----------------------------------------------------------------------+
16 */
17
18 #include "php.h"
19 #include "zend_system_id.h"
20 #include "zend_extensions.h"
21 #include "ext/standard/md5.h"
22 #include "ext/hash/php_hash.h"
23
24 ZEND_API char zend_system_id[32];
25
26 static PHP_MD5_CTX context;
27 static int finalized = 0;
28
zend_add_system_entropy(const char * module_name,const char * hook_name,const void * data,size_t size)29 ZEND_API zend_result zend_add_system_entropy(const char *module_name, const char *hook_name, const void *data, size_t size)
30 {
31 if (finalized == 0) {
32 PHP_MD5Update(&context, module_name, strlen(module_name));
33 PHP_MD5Update(&context, hook_name, strlen(hook_name));
34 if (size) {
35 PHP_MD5Update(&context, data, size);
36 }
37 return SUCCESS;
38 }
39 return FAILURE;
40 }
41
42 #define ZEND_BIN_ID "BIN_" ZEND_TOSTR(SIZEOF_INT) ZEND_TOSTR(SIZEOF_LONG) ZEND_TOSTR(SIZEOF_SIZE_T) ZEND_TOSTR(SIZEOF_ZEND_LONG) ZEND_TOSTR(ZEND_MM_ALIGNMENT)
43
zend_startup_system_id(void)44 void zend_startup_system_id(void)
45 {
46 PHP_MD5Init(&context);
47 PHP_MD5Update(&context, PHP_VERSION, sizeof(PHP_VERSION)-1);
48 PHP_MD5Update(&context, ZEND_EXTENSION_BUILD_ID, sizeof(ZEND_EXTENSION_BUILD_ID)-1);
49 PHP_MD5Update(&context, ZEND_BIN_ID, sizeof(ZEND_BIN_ID)-1);
50 if (strstr(PHP_VERSION, "-dev") != 0) {
51 /* Development versions may be changed from build to build */
52 PHP_MD5Update(&context, __DATE__, sizeof(__DATE__)-1);
53 PHP_MD5Update(&context, __TIME__, sizeof(__TIME__)-1);
54 }
55 zend_system_id[0] = '\0';
56 }
57
58 #define ZEND_HOOK_AST_PROCESS (1 << 0)
59 #define ZEND_HOOK_COMPILE_FILE (1 << 1)
60 #define ZEND_HOOK_EXECUTE_EX (1 << 2)
61 #define ZEND_HOOK_EXECUTE_INTERNAL (1 << 3)
62 #define ZEND_HOOK_INTERRUPT_FUNCTION (1 << 4)
63
zend_finalize_system_id(void)64 void zend_finalize_system_id(void)
65 {
66 unsigned char digest[16];
67 uint8_t hooks = 0;
68
69 if (zend_ast_process) {
70 hooks |= ZEND_HOOK_AST_PROCESS;
71 }
72 if (zend_compile_file != compile_file) {
73 hooks |= ZEND_HOOK_COMPILE_FILE;
74 }
75 if (zend_execute_ex != execute_ex) {
76 hooks |= ZEND_HOOK_EXECUTE_EX;
77 }
78 if (zend_execute_internal) {
79 hooks |= ZEND_HOOK_EXECUTE_INTERNAL;
80 }
81 if (zend_interrupt_function) {
82 hooks |= ZEND_HOOK_INTERRUPT_FUNCTION;
83 }
84 PHP_MD5Update(&context, &hooks, sizeof hooks);
85
86 for (int16_t i = 0; i < 256; i++) {
87 if (zend_get_user_opcode_handler((uint8_t) i) != NULL) {
88 PHP_MD5Update(&context, &i, sizeof i);
89 }
90 }
91
92 PHP_MD5Final(digest, &context);
93 php_hash_bin2hex(zend_system_id, digest, sizeof digest);
94 finalized = 1;
95 }
96
