1/*
2  +----------------------------------------------------------------------+
3  | PHP Version 7                                                        |
4  +----------------------------------------------------------------------+
5  | Copyright (c) 1997-2016 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  | Author: Wez Furlong <wez@php.net>                                    |
16  |         Frank M. Kromann <frank@kromann.info>                        |
17  +----------------------------------------------------------------------+
18*/
19
20/* $Id$ */
21
22#ifdef HAVE_CONFIG_H
23# include "config.h"
24#endif
25
26#include "php.h"
27#include "php_ini.h"
28#include "ext/standard/info.h"
29#include "pdo/php_pdo.h"
30#include "pdo/php_pdo_driver.h"
31#include "php_pdo_dblib.h"
32#include "php_pdo_dblib_int.h"
33#include "zend_exceptions.h"
34
35/* Cache of the server supported datatypes, initialized in handle_factory */
36zval* pdo_dblib_datatypes;
37
38static int dblib_fetch_error(pdo_dbh_t *dbh, pdo_stmt_t *stmt, zval *info)
39{
40	pdo_dblib_db_handle *H = (pdo_dblib_db_handle *)dbh->driver_data;
41	pdo_dblib_err *einfo = &H->err;
42	pdo_dblib_stmt *S = NULL;
43	char *message;
44	char *msg;
45
46	if (stmt) {
47		S = (pdo_dblib_stmt*)stmt->driver_data;
48		einfo = &S->err;
49	}
50
51	if (einfo->dberr == SYBESMSG && einfo->lastmsg) {
52		msg = einfo->lastmsg;
53	} else if (einfo->dberr == SYBESMSG && DBLIB_G(err).lastmsg) {
54		msg = DBLIB_G(err).lastmsg;
55		DBLIB_G(err).lastmsg = NULL;
56	} else {
57		msg = einfo->dberrstr;
58	}
59
60	spprintf(&message, 0, "%s [%d] (severity %d) [%s]",
61		msg, einfo->dberr, einfo->severity, stmt ? stmt->active_query_string : "");
62
63	add_next_index_long(info, einfo->dberr);
64	add_next_index_string(info, message);
65	efree(message);
66	add_next_index_long(info, einfo->oserr);
67	add_next_index_long(info, einfo->severity);
68	if (einfo->oserrstr) {
69		add_next_index_string(info, einfo->oserrstr);
70	}
71
72	return 1;
73}
74
75
76static int dblib_handle_closer(pdo_dbh_t *dbh)
77{
78	pdo_dblib_db_handle *H = (pdo_dblib_db_handle *)dbh->driver_data;
79
80	if (H) {
81		if (H->link) {
82			dbclose(H->link);
83			H->link = NULL;
84		}
85		if (H->login) {
86			dbfreelogin(H->login);
87			H->login = NULL;
88		}
89		pefree(H, dbh->is_persistent);
90		dbh->driver_data = NULL;
91	}
92	return 0;
93}
94
95static int dblib_handle_preparer(pdo_dbh_t *dbh, const char *sql, size_t sql_len, pdo_stmt_t *stmt, zval *driver_options)
96{
97	pdo_dblib_db_handle *H = (pdo_dblib_db_handle *)dbh->driver_data;
98	pdo_dblib_stmt *S = ecalloc(1, sizeof(*S));
99
100	S->H = H;
101	stmt->driver_data = S;
102	stmt->methods = &dblib_stmt_methods;
103	stmt->supports_placeholders = PDO_PLACEHOLDER_NONE;
104	S->err.sqlstate = stmt->error_code;
105
106	return 1;
107}
108
109static zend_long dblib_handle_doer(pdo_dbh_t *dbh, const char *sql, size_t sql_len)
110{
111	pdo_dblib_db_handle *H = (pdo_dblib_db_handle *)dbh->driver_data;
112	RETCODE ret, resret;
113
114	dbsetuserdata(H->link, (BYTE*)&H->err);
115
116	if (FAIL == dbcmd(H->link, sql)) {
117		return -1;
118	}
119
120	if (FAIL == dbsqlexec(H->link)) {
121		return -1;
122	}
123
124	resret = dbresults(H->link);
125
126	if (resret == FAIL) {
127		return -1;
128	}
129
130	ret = dbnextrow(H->link);
131	if (ret == FAIL) {
132		return -1;
133	}
134
135	if (dbnumcols(H->link) <= 0) {
136		return DBCOUNT(H->link);
137	}
138
139	/* throw away any rows it might have returned */
140	dbcanquery(H->link);
141
142	return DBCOUNT(H->link);
143}
144
145static int dblib_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, size_t unquotedlen, char **quoted, size_t *quotedlen, enum pdo_param_type paramtype)
146{
147
148	int useBinaryEncoding = 0;
149	const char * hex = "0123456789abcdef";
150	int i;
151	char * q;
152	*quotedlen = 0;
153
154	/*
155	 * Detect quoted length and if we should use binary encoding
156	 */
157	for(i=0;i<unquotedlen;i++) {
158		if( 32 > unquoted[i] || 127 < unquoted[i] ) {
159			useBinaryEncoding = 1;
160			break;
161		}
162		if(unquoted[i] == '\'') ++*quotedlen;
163		++*quotedlen;
164	}
165
166	if(useBinaryEncoding) {
167		/*
168		 * Binary safe quoting
169		 * Will implicitly convert for all data types except Text, DateTime & SmallDateTime
170		 *
171		 */
172		*quotedlen = (unquotedlen * 2) + 2; /* 2 chars per byte +2 for "0x" prefix */
173		q = *quoted = emalloc(*quotedlen);
174
175		*q++ = '0';
176		*q++ = 'x';
177		for (i=0;i<unquotedlen;i++) {
178			*q++ = hex[ (*unquoted>>4)&0xF];
179			*q++ = hex[ (*unquoted++)&0xF];
180		}
181	} else {
182		/* Alpha/Numeric Quoting */
183		*quotedlen += 2; /* +2 for opening, closing quotes */
184		q  = *quoted = emalloc(*quotedlen);
185		*q++ = '\'';
186
187		for (i=0;i<unquotedlen;i++) {
188			if (unquoted[i] == '\'') {
189				*q++ = '\'';
190				*q++ = '\'';
191			} else {
192				*q++ = unquoted[i];
193			}
194		}
195		*q++ = '\'';
196	}
197
198	*q = 0;
199
200	return 1;
201}
202
203static int pdo_dblib_transaction_cmd(const char *cmd, pdo_dbh_t *dbh)
204{
205	pdo_dblib_db_handle *H = (pdo_dblib_db_handle *)dbh->driver_data;
206
207	if (FAIL == dbcmd(H->link, cmd)) {
208		return 0;
209	}
210
211	if (FAIL == dbsqlexec(H->link)) {
212		return 0;
213	}
214
215	return 1;
216}
217
218static int dblib_handle_begin(pdo_dbh_t *dbh)
219{
220	return pdo_dblib_transaction_cmd("BEGIN TRANSACTION", dbh);
221}
222
223static int dblib_handle_commit(pdo_dbh_t *dbh)
224{
225	return pdo_dblib_transaction_cmd("COMMIT TRANSACTION", dbh);
226}
227
228static int dblib_handle_rollback(pdo_dbh_t *dbh)
229{
230	return pdo_dblib_transaction_cmd("ROLLBACK TRANSACTION", dbh);
231}
232
233char *dblib_handle_last_id(pdo_dbh_t *dbh, const char *name, size_t *len)
234{
235	pdo_dblib_db_handle *H = (pdo_dblib_db_handle *)dbh->driver_data;
236
237	RETCODE ret;
238	char *id = NULL;
239
240	/*
241	 * Would use scope_identity() but it's not implemented on Sybase
242	 */
243
244	if (FAIL == dbcmd(H->link, "SELECT @@IDENTITY")) {
245		return NULL;
246	}
247
248	if (FAIL == dbsqlexec(H->link)) {
249		return NULL;
250	}
251
252	ret = dbresults(H->link);
253	if (ret == FAIL || ret == NO_MORE_RESULTS) {
254		dbcancel(H->link);
255		return NULL;
256	}
257
258	ret = dbnextrow(H->link);
259
260	if (ret == FAIL || ret == NO_MORE_ROWS) {
261		dbcancel(H->link);
262		return NULL;
263	}
264
265	if (dbdatlen(H->link, 1) == 0) {
266		dbcancel(H->link);
267		return NULL;
268	}
269
270	id = emalloc(32);
271	*len = dbconvert(NULL, (dbcoltype(H->link, 1)) , (dbdata(H->link, 1)) , (dbdatlen(H->link, 1)), SQLCHAR, (BYTE *)id, (DBINT)-1);
272
273	dbcancel(H->link);
274	return id;
275}
276
277static int dblib_set_attr(pdo_dbh_t *dbh, zend_long attr, zval *val)
278{
279	switch(attr) {
280		case PDO_ATTR_TIMEOUT:
281			return 0;
282		default:
283			return 1;
284	}
285
286}
287
288static int dblib_get_attribute(pdo_dbh_t *dbh, zend_long attr, zval *return_value)
289{
290	/* dblib_handle *H = (pdo_pgsql_db_handle *)dbh->driver_data; */
291	return 0;
292}
293
294static struct pdo_dbh_methods dblib_methods = {
295	dblib_handle_closer,
296	dblib_handle_preparer,
297	dblib_handle_doer,
298	dblib_handle_quoter,
299	dblib_handle_begin, /* begin */
300	dblib_handle_commit, /* commit */
301	dblib_handle_rollback, /* rollback */
302	dblib_set_attr, /*set attr */
303	dblib_handle_last_id, /* last insert id */
304	dblib_fetch_error, /* fetch error */
305	dblib_get_attribute, /* get attr */
306	NULL, /* check liveness */
307	NULL, /* get driver methods */
308	NULL, /* request shutdown */
309	NULL  /* in transaction */
310};
311
312static int pdo_dblib_handle_factory(pdo_dbh_t *dbh, zval *driver_options)
313{
314	pdo_dblib_db_handle *H;
315	int i, nvars, nvers, ret = 0;
316
317	const pdo_dblib_keyval tdsver[] = {
318		 {"4.2",DBVERSION_42}
319		,{"4.6",DBVERSION_46}
320		,{"5.0",DBVERSION_70} /* FIXME: This does not work with Sybase, but environ will */
321		,{"6.0",DBVERSION_70}
322		,{"7.0",DBVERSION_70}
323#ifdef DBVERSION_71
324		,{"7.1",DBVERSION_71}
325#endif
326#ifdef DBVERSION_72
327		,{"7.2",DBVERSION_72}
328		,{"8.0",DBVERSION_72}
329#endif
330		,{"10.0",DBVERSION_100}
331		,{"auto",0} /* Only works with FreeTDS. Other drivers will bork */
332
333	};
334
335	nvers = sizeof(tdsver)/sizeof(tdsver[0]);
336
337	struct pdo_data_src_parser vars[] = {
338		{ "charset",	NULL,	0 }
339		,{ "appname",	"PHP " PDO_DBLIB_FLAVOUR,	0 }
340		,{ "host",		"127.0.0.1", 0 }
341		,{ "dbname",	NULL,	0 }
342		,{ "secure",	NULL,	0 } /* DBSETLSECURE */
343		,{ "version",	NULL,	0 } /* DBSETLVERSION */
344	};
345
346	nvars = sizeof(vars)/sizeof(vars[0]);
347
348	php_pdo_parse_data_source(dbh->data_source, dbh->data_source_len, vars, nvars);
349
350	if (driver_options) {
351		int timeout = pdo_attr_lval(driver_options, PDO_ATTR_TIMEOUT, 30);
352		dbsetlogintime(timeout); /* Connection/Login Timeout */
353		dbsettime(timeout); /* Statement Timeout */
354	}
355
356	H = pecalloc(1, sizeof(*H), dbh->is_persistent);
357	H->login = dblogin();
358	H->err.sqlstate = dbh->error_code;
359
360	if (!H->login) {
361		goto cleanup;
362	}
363
364	DBERRHANDLE(H->login, (EHANDLEFUNC) pdo_dblib_error_handler);
365	DBMSGHANDLE(H->login, (MHANDLEFUNC) pdo_dblib_msg_handler);
366
367	if(vars[5].optval) {
368		for(i=0;i<nvers;i++) {
369			if(strcmp(vars[5].optval,tdsver[i].key) == 0) {
370				if(FAIL==dbsetlversion(H->login, tdsver[i].value)) {
371					pdo_raise_impl_error(dbh, NULL, "HY000", "PDO_DBLIB: Failed to set version specified in connection string.");
372					goto cleanup;
373				}
374				break;
375			}
376		}
377
378		if (i==nvers) {
379			printf("Invalid version '%s'\n", vars[5].optval);
380			pdo_raise_impl_error(dbh, NULL, "HY000", "PDO_DBLIB: Invalid version specified in connection string.");
381			goto cleanup; /* unknown version specified */
382		}
383	}
384
385	if (dbh->username) {
386		if(FAIL == DBSETLUSER(H->login, dbh->username)) {
387			goto cleanup;
388		}
389	}
390
391	if (dbh->password) {
392		if(FAIL == DBSETLPWD(H->login, dbh->password)) {
393			goto cleanup;
394		}
395	}
396
397#if !PHP_DBLIB_IS_MSSQL
398	if (vars[0].optval) {
399		DBSETLCHARSET(H->login, vars[0].optval);
400	}
401#endif
402
403	DBSETLAPP(H->login, vars[1].optval);
404
405/* DBSETLDBNAME is only available in FreeTDS 0.92 or above */
406#ifdef DBSETLDBNAME
407	if (vars[3].optval) {
408		if(FAIL == DBSETLDBNAME(H->login, vars[3].optval)) goto cleanup;
409	}
410#endif
411
412	H->link = dbopen(H->login, vars[2].optval);
413
414	if (!H->link) {
415		goto cleanup;
416	}
417
418/*
419 * FreeTDS < 0.92 does not support the DBSETLDBNAME option
420 * Send use database here after login (Will not work with SQL Azure)
421 */
422#ifndef DBSETLDBNAME
423	if (vars[3].optval) {
424		if(FAIL == dbuse(H->link, vars[3].optval)) goto cleanup;
425	}
426#endif
427
428#if PHP_DBLIB_IS_MSSQL
429	/* dblib do not return more than this length from text/image */
430	DBSETOPT(H->link, DBTEXTLIMIT, "2147483647");
431#endif
432
433	/* limit text/image from network */
434	DBSETOPT(H->link, DBTEXTSIZE, "2147483647");
435
436	/* allow double quoted indentifiers */
437	DBSETOPT(H->link, DBQUOTEDIDENT, "1");
438
439	ret = 1;
440	dbh->max_escaped_char_length = 2;
441	dbh->alloc_own_columns = 1;
442
443cleanup:
444	for (i = 0; i < nvars; i++) {
445		if (vars[i].freeme) {
446			efree(vars[i].optval);
447		}
448	}
449
450	dbh->methods = &dblib_methods;
451	dbh->driver_data = H;
452
453	if (!ret) {
454		zend_throw_exception_ex(php_pdo_get_exception(), DBLIB_G(err).dberr,
455			"SQLSTATE[%s] %s (severity %d)",
456			DBLIB_G(err).sqlstate,
457			DBLIB_G(err).dberrstr,
458			DBLIB_G(err).severity);
459	}
460
461	return ret;
462}
463
464pdo_driver_t pdo_dblib_driver = {
465#if PDO_DBLIB_IS_MSSQL
466	PDO_DRIVER_HEADER(mssql),
467#elif defined(PHP_WIN32)
468#define PDO_DBLIB_IS_SYBASE
469	PDO_DRIVER_HEADER(sybase),
470#else
471	PDO_DRIVER_HEADER(dblib),
472#endif
473	pdo_dblib_handle_factory
474};
475
476