Exemplo n.º 1
0
/* {{{ mysqlnd_local_infile_init */
static
int mysqlnd_local_infile_init(void ** ptr, const char * const filename)
{
	MYSQLND_INFILE_INFO	*info;
	php_stream_context	*context = NULL;

	DBG_ENTER("mysqlnd_local_infile_init");

	info = ((MYSQLND_INFILE_INFO *)mnd_ecalloc(1, sizeof(MYSQLND_INFILE_INFO)));
	if (!info) {
		DBG_RETURN(1);
	}

	*ptr = info;

	/* check open_basedir */
	if (PG(open_basedir)) {
		if (php_check_open_basedir_ex(filename, 0) == -1) {
			strcpy(info->error_msg, "open_basedir restriction in effect. Unable to open file");
			info->error_no = CR_UNKNOWN_ERROR;
			DBG_RETURN(1);
		}
	}

	info->filename = filename;
	info->fd = php_stream_open_wrapper_ex((char *)filename, "r", 0, NULL, context);

	if (info->fd == NULL) {
		snprintf((char *)info->error_msg, sizeof(info->error_msg), "Can't find file '%-.64s'.", filename);
		info->error_no = MYSQLND_EE_FILENOTFOUND;
		DBG_RETURN(1);
	}

	DBG_RETURN(0);
}
Exemplo n.º 2
0
/* {{{ OnUpdateBaseDir
Allows any change to open_basedir setting in during Startup and Shutdown events,
or a tightening during activation/runtime/deactivation */
PHPAPI ZEND_INI_MH(OnUpdateBaseDir)
{
	char **p, *pathbuf, *ptr, *end;
#ifndef ZTS
	char *base = (char *) mh_arg2;
#else
	char *base = (char *) ts_resource(*((int *) mh_arg2));
#endif

	p = (char **) (base + (size_t) mh_arg1);

	if (stage == PHP_INI_STAGE_STARTUP || stage == PHP_INI_STAGE_SHUTDOWN || stage == PHP_INI_STAGE_ACTIVATE || stage == PHP_INI_STAGE_DEACTIVATE) {
		/* We're in a PHP_INI_SYSTEM context, no restrictions */
		*p = new_value ? new_value->val : NULL;
		return SUCCESS;
	}

	/* Otherwise we're in runtime */
	if (!*p || !**p) {
		/* open_basedir not set yet, go ahead and give it a value */
		*p = new_value->val;
		return SUCCESS;
	}

	/* Shortcut: When we have a open_basedir and someone tries to unset, we know it'll fail */
	if (!new_value || !*new_value->val) {
		return FAILURE;
	}

	/* Is the proposed open_basedir at least as restrictive as the current setting? */
	ptr = pathbuf = estrdup(new_value->val);
	while (ptr && *ptr) {
		end = strchr(ptr, DEFAULT_DIR_SEPARATOR);
		if (end != NULL) {
			*end = '\0';
			end++;
		}
		if (php_check_open_basedir_ex(ptr, 0) != 0) {
			/* At least one portion of this open_basedir is less restrictive than the prior one, FAIL */
			efree(pathbuf);
			return FAILURE;
		}
		ptr = end;
	}
	efree(pathbuf);

	/* Everything checks out, set it */
	*p = new_value->val;

	return SUCCESS;
}
Exemplo n.º 3
0
/* {{{ php_check_specific_open_basedir
	When open_basedir is not NULL, check if the given filename is located in
	open_basedir. Returns -1 if error or not in the open_basedir, else 0.
	When open_basedir is NULL, always return 0.
*/
PHPAPI int php_check_specific_open_basedir(const char *basedir, const char *path)
{
	char resolved_name[MAXPATHLEN];
	char resolved_basedir[MAXPATHLEN];
	char local_open_basedir[MAXPATHLEN];
	char path_tmp[MAXPATHLEN];
	char *path_file;
	int resolved_basedir_len;
	int resolved_name_len;
	int path_len;
	int nesting_level = 0;

	/* Special case basedir==".": Use script-directory */
	if (strcmp(basedir, ".") || !VCWD_GETCWD(local_open_basedir, MAXPATHLEN)) {
		/* Else use the unmodified path */
		strlcpy(local_open_basedir, basedir, sizeof(local_open_basedir));
	}

	path_len = (int)strlen(path);
	if (path_len > (MAXPATHLEN - 1)) {
		/* empty and too long paths are invalid */
		return -1;
	}

	/* normalize and expand path */
	if (expand_filepath(path, resolved_name) == NULL) {
		return -1;
	}

	path_len = (int)strlen(resolved_name);
	memcpy(path_tmp, resolved_name, path_len + 1); /* safe */

	while (VCWD_REALPATH(path_tmp, resolved_name) == NULL) {
#if defined(PHP_WIN32) || defined(HAVE_SYMLINK)
#if defined(PHP_WIN32)
		if (EG(windows_version_info).dwMajorVersion > 5) {
#endif
			if (nesting_level == 0) {
				int ret;
				char buf[MAXPATHLEN];

				ret = php_sys_readlink(path_tmp, buf, MAXPATHLEN - 1);
				if (ret < 0) {
					/* not a broken symlink, move along.. */
				} else {
					/* put the real path into the path buffer */
					memcpy(path_tmp, buf, ret);
					path_tmp[ret] = '\0';
				}
			}
#if defined(PHP_WIN32)
		}
#endif
#endif

#if defined(PHP_WIN32) || defined(NETWARE)
		path_file = strrchr(path_tmp, DEFAULT_SLASH);
		if (!path_file) {
			path_file = strrchr(path_tmp, '/');
		}
#else
		path_file = strrchr(path_tmp, DEFAULT_SLASH);
#endif
		if (!path_file) {
			/* none of the path components exist. definitely not in open_basedir.. */
			return -1;
		} else {
			path_len = path_file - path_tmp + 1;
#if defined(PHP_WIN32) || defined(NETWARE)
			if (path_len > 1 && path_tmp[path_len - 2] == ':') {
				if (path_len != 3) {
					return -1;
				}
				/* this is c:\ */
				path_tmp[path_len] = '\0';
			} else {
				path_tmp[path_len - 1] = '\0';
			}
#else
			path_tmp[path_len - 1] = '\0';
#endif
		}
		nesting_level++;
	}

	/* Resolve open_basedir to resolved_basedir */
	if (expand_filepath(local_open_basedir, resolved_basedir) != NULL) {
		int basedir_len = (int)strlen(basedir);
		/* Handler for basedirs that end with a / */
		resolved_basedir_len = (int)strlen(resolved_basedir);
#if defined(PHP_WIN32) || defined(NETWARE)
		if (basedir[basedir_len - 1] == PHP_DIR_SEPARATOR || basedir[basedir_len - 1] == '/') {
#else
		if (basedir[basedir_len - 1] == PHP_DIR_SEPARATOR) {
#endif
			if (resolved_basedir[resolved_basedir_len - 1] != PHP_DIR_SEPARATOR) {
				resolved_basedir[resolved_basedir_len] = PHP_DIR_SEPARATOR;
				resolved_basedir[++resolved_basedir_len] = '\0';
			}
		} else {
				resolved_basedir[resolved_basedir_len++] = PHP_DIR_SEPARATOR;
				resolved_basedir[resolved_basedir_len] = '\0';
		}

		resolved_name_len = (int)strlen(resolved_name);
		if (path_tmp[path_len - 1] == PHP_DIR_SEPARATOR) {
			if (resolved_name[resolved_name_len - 1] != PHP_DIR_SEPARATOR) {
				resolved_name[resolved_name_len] = PHP_DIR_SEPARATOR;
				resolved_name[++resolved_name_len] = '\0';
			}
		}

		/* Check the path */
#if defined(PHP_WIN32) || defined(NETWARE)
		if (strncasecmp(resolved_basedir, resolved_name, resolved_basedir_len) == 0) {
#else
		if (strncmp(resolved_basedir, resolved_name, resolved_basedir_len) == 0) {
#endif
			if (resolved_name_len > resolved_basedir_len &&
				resolved_name[resolved_basedir_len - 1] != PHP_DIR_SEPARATOR) {
				return -1;
			} else {
				/* File is in the right directory */
				return 0;
			}
		} else {
			/* /openbasedir/ and /openbasedir are the same directory */
			if (resolved_basedir_len == (resolved_name_len + 1) && resolved_basedir[resolved_basedir_len - 1] == PHP_DIR_SEPARATOR) {
#if defined(PHP_WIN32) || defined(NETWARE)
				if (strncasecmp(resolved_basedir, resolved_name, resolved_name_len) == 0) {
#else
				if (strncmp(resolved_basedir, resolved_name, resolved_name_len) == 0) {
#endif
					return 0;
				}
			}
			return -1;
		}
	} else {
		/* Unable to resolve the real path, return -1 */
		return -1;
	}
}
/* }}} */

PHPAPI int php_check_open_basedir(const char *path)
{
	return php_check_open_basedir_ex(path, 1);
}

/* {{{ php_check_open_basedir
 */
PHPAPI int php_check_open_basedir_ex(const char *path, int warn)
{
	/* Only check when open_basedir is available */
	if (PG(open_basedir) && *PG(open_basedir)) {
		char *pathbuf;
		char *ptr;
		char *end;

		/* Check if the path is too long so we can give a more useful error
		* message. */
		if (strlen(path) > (MAXPATHLEN - 1)) {
			php_error_docref(NULL, E_WARNING, "File name is longer than the maximum allowed path length on this platform (%d): %s", MAXPATHLEN, path);
			errno = EINVAL;
			return -1;
		}

		pathbuf = estrdup(PG(open_basedir));

		ptr = pathbuf;

		while (ptr && *ptr) {
			end = strchr(ptr, DEFAULT_DIR_SEPARATOR);
			if (end != NULL) {
				*end = '\0';
				end++;
			}

			if (php_check_specific_open_basedir(ptr, path) == 0) {
				efree(pathbuf);
				return 0;
			}

			ptr = end;
		}
		if (warn) {
			php_error_docref(NULL, E_WARNING, "open_basedir restriction in effect. File(%s) is not within the allowed path(s): (%s)", path, PG(open_basedir));
		}
		efree(pathbuf);
		errno = EPERM; /* we deny permission to open it */
		return -1;
	}

	/* Nothing to check... */
	return 0;
}
/* }}} */

/* {{{ php_fopen_and_set_opened_path
 */
static FILE *php_fopen_and_set_opened_path(const char *path, const char *mode, zend_string **opened_path)
{
	FILE *fp;

	if (php_check_open_basedir((char *)path)) {
		return NULL;
	}
	fp = VCWD_FOPEN(path, mode);
	if (fp && opened_path) {
		//TODO :avoid reallocation
		char *tmp = expand_filepath_with_mode(path, NULL, NULL, 0, CWD_EXPAND);
		if (tmp) {
			*opened_path = zend_string_init(tmp, strlen(tmp), 0);
			efree(tmp);
		}
	}
	return fp;
}