1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Bob Weinand <bwoebi@php.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 #include "phpdbg_wait.h"
20 #include "phpdbg_prompt.h"
21 #include "ext/standard/php_var.h"
22 #include "ext/standard/basic_functions.h"
23
ZEND_EXTERN_MODULE_GLOBALS(phpdbg)24 ZEND_EXTERN_MODULE_GLOBALS(phpdbg)
25
26 static void phpdbg_rebuild_http_globals_array(int type, const char *name) {
27 zval *zvp;
28 if (Z_TYPE(PG(http_globals)[type]) != IS_UNDEF) {
29 zval_dtor(&PG(http_globals)[type]);
30 }
31 if ((zvp = zend_hash_str_find(&EG(symbol_table), name, strlen(name)))) {
32 Z_ADDREF_P(zvp);
33 PG(http_globals)[type] = *zvp;
34 }
35 }
36
37
phpdbg_dearm_autoglobals(zend_auto_global * auto_global)38 static int phpdbg_dearm_autoglobals(zend_auto_global *auto_global) {
39 if (ZSTR_LEN(auto_global->name) != sizeof("GLOBALS") - 1 || memcmp(ZSTR_VAL(auto_global->name), "GLOBALS", sizeof("GLOBALS") - 1)) {
40 auto_global->armed = 0;
41 }
42
43 return ZEND_HASH_APPLY_KEEP;
44 }
45
46 typedef struct {
47 HashTable *ht[2];
48 HashPosition pos[2];
49 } phpdbg_intersect_ptr;
50
phpdbg_array_data_compare(const void * a,const void * b)51 static int phpdbg_array_data_compare(const void *a, const void *b) {
52 Bucket *f, *s;
53 int result;
54 zval *first, *second;
55
56 f = *((Bucket **) a);
57 s = *((Bucket **) b);
58
59 first = &f->val;
60 second = &s->val;
61
62 result = string_compare_function(first, second);
63
64 if (result < 0) {
65 return -1;
66 } else if (result > 0) {
67 return 1;
68 }
69
70 return 0;
71 }
72
phpdbg_array_intersect_init(phpdbg_intersect_ptr * info,HashTable * ht1,HashTable * ht2)73 static void phpdbg_array_intersect_init(phpdbg_intersect_ptr *info, HashTable *ht1, HashTable *ht2) {
74 info->ht[0] = ht1;
75 info->ht[1] = ht2;
76
77 zend_hash_sort(info->ht[0], (compare_func_t) phpdbg_array_data_compare, 0);
78 zend_hash_sort(info->ht[1], (compare_func_t) phpdbg_array_data_compare, 0);
79
80 zend_hash_internal_pointer_reset_ex(info->ht[0], &info->pos[0]);
81 zend_hash_internal_pointer_reset_ex(info->ht[1], &info->pos[1]);
82 }
83
84 /* -1 => first array, 0 => both arrays equal, 1 => second array */
phpdbg_array_intersect(phpdbg_intersect_ptr * info,zval ** ptr)85 static int phpdbg_array_intersect(phpdbg_intersect_ptr *info, zval **ptr) {
86 int ret;
87 zval *zvp[2];
88 int invalid = !info->ht[0] + !info->ht[1];
89
90 if (invalid > 0) {
91 invalid = !info->ht[0];
92
93 if (!(*ptr = zend_hash_get_current_data_ex(info->ht[invalid], &info->pos[invalid]))) {
94 return 0;
95 }
96
97 zend_hash_move_forward_ex(info->ht[invalid], &info->pos[invalid]);
98
99 return invalid ? 1 : -1;
100 }
101
102 if (!(zvp[0] = zend_hash_get_current_data_ex(info->ht[0], &info->pos[0]))) {
103 info->ht[0] = NULL;
104 return phpdbg_array_intersect(info, ptr);
105 }
106 if (!(zvp[1] = zend_hash_get_current_data_ex(info->ht[1], &info->pos[1]))) {
107 info->ht[1] = NULL;
108 return phpdbg_array_intersect(info, ptr);
109 }
110
111 ret = zend_binary_zval_strcmp(zvp[0], zvp[1]);
112
113 if (ret <= 0) {
114 *ptr = zvp[0];
115 zend_hash_move_forward_ex(info->ht[0], &info->pos[0]);
116 }
117 if (ret >= 0) {
118 *ptr = zvp[1];
119 zend_hash_move_forward_ex(info->ht[1], &info->pos[1]);
120 }
121
122 return ret;
123 }
124
phpdbg_webdata_decompress(char * msg,int len)125 void phpdbg_webdata_decompress(char *msg, int len) {
126 zval *free_zv = NULL;
127 zval zv, *zvp;
128 HashTable *ht;
129 php_unserialize_data_t var_hash;
130
131 PHP_VAR_UNSERIALIZE_INIT(var_hash);
132 if (!php_var_unserialize(&zv, (const unsigned char **) &msg, (unsigned char *) msg + len, &var_hash)) {
133 PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
134 phpdbg_error("wait", "type=\"invaliddata\" import=\"fail\"", "Malformed serialized was sent to this socket, arborting");
135 return;
136 }
137 PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
138
139 ht = Z_ARRVAL(zv);
140
141 /* Reapply symbol table */
142 if ((zvp = zend_hash_str_find(ht, ZEND_STRL("GLOBALS"))) && Z_TYPE_P(zvp) == IS_ARRAY) {
143 {
144 zval *srv;
145 if ((srv = zend_hash_str_find(Z_ARRVAL_P(zvp), ZEND_STRL("_SERVER"))) && Z_TYPE_P(srv) == IS_ARRAY) {
146 zval *script;
147 if ((script = zend_hash_str_find(Z_ARRVAL_P(srv), ZEND_STRL("SCRIPT_FILENAME"))) && Z_TYPE_P(script) == IS_STRING) {
148 phpdbg_param_t param;
149 param.str = Z_STRVAL_P(script);
150 PHPDBG_COMMAND_HANDLER(exec)(¶m);
151 }
152 }
153 }
154
155 PG(auto_globals_jit) = 0;
156 zend_hash_apply(CG(auto_globals), (apply_func_t) phpdbg_dearm_autoglobals);
157
158 zend_hash_clean(&EG(symbol_table));
159 EG(symbol_table) = *Z_ARR_P(zvp);
160
161 /* Rebuild cookies, env vars etc. from GLOBALS (PG(http_globals)) */
162 phpdbg_rebuild_http_globals_array(TRACK_VARS_POST, "_POST");
163 phpdbg_rebuild_http_globals_array(TRACK_VARS_GET, "_GET");
164 phpdbg_rebuild_http_globals_array(TRACK_VARS_COOKIE, "_COOKIE");
165 phpdbg_rebuild_http_globals_array(TRACK_VARS_SERVER, "_SERVER");
166 phpdbg_rebuild_http_globals_array(TRACK_VARS_ENV, "_ENV");
167 phpdbg_rebuild_http_globals_array(TRACK_VARS_FILES, "_FILES");
168
169 Z_ADDREF_P(zvp);
170 free_zv = zvp;
171 }
172
173 if ((zvp = zend_hash_str_find(ht, ZEND_STRL("input"))) && Z_TYPE_P(zvp) == IS_STRING) {
174 if (SG(request_info).request_body) {
175 php_stream_close(SG(request_info).request_body);
176 }
177 SG(request_info).request_body = php_stream_temp_create_ex(TEMP_STREAM_DEFAULT, SAPI_POST_BLOCK_SIZE, PG(upload_tmp_dir));
178 php_stream_truncate_set_size(SG(request_info).request_body, 0);
179 php_stream_write(SG(request_info).request_body, Z_STRVAL_P(zvp), Z_STRLEN_P(zvp));
180 }
181
182 if ((zvp = zend_hash_str_find(ht, ZEND_STRL("cwd"))) && Z_TYPE_P(zvp) == IS_STRING) {
183 if (VCWD_CHDIR(Z_STRVAL_P(zvp)) == SUCCESS) {
184 if (BG(CurrentStatFile) && !IS_ABSOLUTE_PATH(BG(CurrentStatFile), strlen(BG(CurrentStatFile)))) {
185 efree(BG(CurrentStatFile));
186 BG(CurrentStatFile) = NULL;
187 }
188 if (BG(CurrentLStatFile) && !IS_ABSOLUTE_PATH(BG(CurrentLStatFile), strlen(BG(CurrentLStatFile)))) {
189 efree(BG(CurrentLStatFile));
190 BG(CurrentLStatFile) = NULL;
191 }
192 }
193 }
194
195 if ((zvp = zend_hash_str_find(ht, ZEND_STRL("sapi_name"))) && (Z_TYPE_P(zvp) == IS_STRING || Z_TYPE_P(zvp) == IS_NULL)) {
196 if (PHPDBG_G(sapi_name_ptr)) {
197 free(PHPDBG_G(sapi_name_ptr));
198 }
199 if (Z_TYPE_P(zvp) == IS_STRING) {
200 PHPDBG_G(sapi_name_ptr) = sapi_module.name = strdup(Z_STRVAL_P(zvp));
201 } else {
202 PHPDBG_G(sapi_name_ptr) = sapi_module.name = NULL;
203 }
204 }
205
206 if ((zvp = zend_hash_str_find(ht, ZEND_STRL("modules"))) && Z_TYPE_P(zvp) == IS_ARRAY) {
207 phpdbg_intersect_ptr pos;
208 zval *module;
209 zend_module_entry *mod;
210 HashTable zv_registry;
211
212 /* intersect modules, unregister modules loaded "too much", announce not yet registered modules (phpdbg_notice) */
213
214 zend_hash_init(&zv_registry, zend_hash_num_elements(&module_registry), 0, ZVAL_PTR_DTOR, 0);
215 ZEND_HASH_FOREACH_PTR(&module_registry, mod) {
216 if (mod->name) {
217 zval value;
218 ZVAL_NEW_STR(&value, zend_string_init(mod->name, strlen(mod->name), 0));
219 zend_hash_next_index_insert(&zv_registry, &value);
220 }
221 } ZEND_HASH_FOREACH_END();
222
223 phpdbg_array_intersect_init(&pos, &zv_registry, Z_ARRVAL_P(zvp));
224 do {
225 int mode = phpdbg_array_intersect(&pos, &module);
226 if (mode < 0) {
227 // loaded module, but not needed
228 if (strcmp(PHPDBG_NAME, Z_STRVAL_P(module))) {
229 zend_hash_del(&module_registry, Z_STR_P(module));
230 }
231 } else if (mode > 0) {
232 // not loaded module
233 if (!sapi_module.name || strcmp(sapi_module.name, Z_STRVAL_P(module))) {
234 phpdbg_notice("wait", "missingmodule=\"%.*s\"", "The module %.*s isn't present in " PHPDBG_NAME ", you still can load via dl /path/to/module/%.*s.so", (int) Z_STRLEN_P(module), Z_STRVAL_P(module), (int) Z_STRLEN_P(module), Z_STRVAL_P(module));
235 }
236 }
237 } while (module);
238
239 zend_hash_clean(&zv_registry);
240 }
241
242 if ((zvp = zend_hash_str_find(ht, ZEND_STRL("extensions"))) && Z_TYPE_P(zvp) == IS_ARRAY) {
243 zend_extension *extension;
244 zend_llist_position pos;
245 zval *name = NULL;
246 zend_string *strkey;
247
248 extension = (zend_extension *) zend_llist_get_first_ex(&zend_extensions, &pos);
249 while (extension) {
250 extension = (zend_extension *) zend_llist_get_next_ex(&zend_extensions, &pos);
251 if (extension == NULL){
252 break;
253 }
254
255 ZEND_HASH_FOREACH_STR_KEY_PTR(Z_ARRVAL_P(zvp), strkey, name) {
256 if (Z_TYPE_P(name) == IS_STRING && !zend_binary_strcmp(extension->name, strlen(extension->name), Z_STRVAL_P(name), Z_STRLEN_P(name))) {
257 break;
258 }
259 name = NULL;
260 } ZEND_HASH_FOREACH_END();
261
262 if (name) {
263 /* sigh, breaking the encapsulation, there aren't any functions manipulating the llist at the place of the zend_llist_position */
264 zend_llist_element *elm = pos;
265 if (elm->prev) {
266 elm->prev->next = elm->next;
267 } else {
268 zend_extensions.head = elm->next;
269 }
270 if (elm->next) {
271 elm->next->prev = elm->prev;
272 } else {
273 zend_extensions.tail = elm->prev;
274 }
275 #if ZEND_EXTENSIONS_SUPPORT
276 if (extension->shutdown) {
277 extension->shutdown(extension);
278 }
279 #endif
280 if (zend_extensions.dtor) {
281 zend_extensions.dtor(elm->data);
282 }
283 pefree(elm, zend_extensions.persistent);
284 zend_extensions.count--;
285 } else {
286 zend_hash_del(Z_ARRVAL_P(zvp), strkey);
287 }
288 }
289
290 ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(zvp), name) {
291 if (Z_TYPE_P(name) == IS_STRING) {
292 phpdbg_notice("wait", "missingextension=\"%.*s\"", "The Zend extension %.*s isn't present in " PHPDBG_NAME ", you still can load via dl /path/to/extension.so", (int) Z_STRLEN_P(name), Z_STRVAL_P(name));
293 }
294 } ZEND_HASH_FOREACH_END();
295 }
296
297 zend_ini_deactivate();
298
299 if ((zvp = zend_hash_str_find(ht, ZEND_STRL("systemini"))) && Z_TYPE_P(zvp) == IS_ARRAY) {
300 zval *ini_entry;
301 zend_ini_entry *original_ini;
302 zend_string *key;
303
304 ZEND_HASH_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(zvp), key, ini_entry) {
305 if (key && Z_TYPE_P(ini_entry) == IS_STRING) {
306 if ((original_ini = zend_hash_find_ptr(EG(ini_directives), key))) {
307 if (!original_ini->on_modify || original_ini->on_modify(original_ini, Z_STR_P(ini_entry), original_ini->mh_arg1, original_ini->mh_arg2, original_ini->mh_arg3, ZEND_INI_STAGE_ACTIVATE) == SUCCESS) {
308 if (original_ini->modified && original_ini->orig_value != original_ini->value) {
309 efree(original_ini->value);
310 }
311 original_ini->value = Z_STR_P(ini_entry);
312 Z_ADDREF_P(ini_entry); /* don't free the string */
313 }
314 }
315 }
316 } ZEND_HASH_FOREACH_END();
317 }
318
319 if ((zvp = zend_hash_str_find(ht, ZEND_STRL("userini"))) && Z_TYPE_P(zvp) == IS_ARRAY) {
320 zval *ini_entry;
321 zend_string *key;
322
323 ZEND_HASH_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(zvp), key, ini_entry) {
324 if (key && Z_TYPE_P(ini_entry) == IS_STRING) {
325 zend_alter_ini_entry_ex(key, Z_STR_P(ini_entry), ZEND_INI_PERDIR, ZEND_INI_STAGE_HTACCESS, 1);
326 }
327 } ZEND_HASH_FOREACH_END();
328 }
329
330 zval_dtor(&zv);
331 if (free_zv) {
332 /* separate freeing to not dtor the symtable too, just the container zval... */
333 efree(free_zv);
334 }
335
336 /* Reapply raw input */
337 /* ??? */
338 }
339
PHPDBG_COMMAND(wait)340 PHPDBG_COMMAND(wait) /* {{{ */
341 {
342 #ifndef PHP_WIN32
343 struct sockaddr_un local, remote;
344 int rlen, sr, sl;
345 unlink(PHPDBG_G(socket_path));
346 if (PHPDBG_G(socket_server_fd) == -1) {
347 int len;
348 PHPDBG_G(socket_server_fd) = sl = socket(AF_UNIX, SOCK_STREAM, 0);
349 if (sl == -1) {
350 phpdbg_error("wait", "type=\"nosocket\" import=\"fail\"", "Unable to open a socket to UNIX domain socket at %s defined by phpdbg.path ini setting", PHPDBG_G(socket_path));
351 return FAILURE;
352 }
353
354 local.sun_family = AF_UNIX;
355 if (strlcpy(local.sun_path, PHPDBG_G(socket_path), sizeof(local.sun_path)) > sizeof(local.sun_path)) {
356 phpdbg_error("wait", "type=\"nosocket\" import=\"fail\"", "Socket at %s defined by phpdbg.path ini setting is too long", PHPDBG_G(socket_path));
357 return FAILURE;
358 }
359 len = strlen(local.sun_path) + sizeof(local.sun_family);
360 if (bind(sl, (struct sockaddr *)&local, len) == -1) {
361 phpdbg_error("wait", "type=\"nosocket\" import=\"fail\"", "Unable to connect to UNIX domain socket at %s defined by phpdbg.path ini setting", PHPDBG_G(socket_path));
362 return FAILURE;
363 }
364
365 chmod(PHPDBG_G(socket_path), 0666);
366
367 listen(sl, 2);
368 } else {
369 sl = PHPDBG_G(socket_server_fd);
370 }
371
372 rlen = sizeof(remote);
373 sr = accept(sl, (struct sockaddr *) &remote, (socklen_t *) &rlen);
374 if (sr == -1) {
375 phpdbg_error("wait", "type=\"nosocket\" import=\"fail\"", "Unable to create a connection to UNIX domain socket at %s defined by phpdbg.path ini setting", PHPDBG_G(socket_path));
376 close(PHPDBG_G(socket_server_fd));
377 return FAILURE;
378 }
379
380 char msglen[5];
381 int recvd = 4;
382
383 do {
384 recvd -= recv(sr, &(msglen[4 - recvd]), recvd, 0);
385 } while (recvd > 0);
386
387 recvd = *(size_t *) msglen;
388 char *data = emalloc(recvd);
389
390 do {
391 recvd -= recv(sr, &(data[(*(int *) msglen) - recvd]), recvd, 0);
392 } while (recvd > 0);
393
394 phpdbg_webdata_decompress(data, *(int *) msglen);
395
396 if (PHPDBG_G(socket_fd) != -1) {
397 close(PHPDBG_G(socket_fd));
398 }
399 PHPDBG_G(socket_fd) = sr;
400
401 efree(data);
402
403 phpdbg_notice("wait", "import=\"success\"", "Successfully imported request data, stopped before executing");
404 #endif
405
406 return SUCCESS;
407 } /* }}} */
408
