xref: /PHP-7.2/ext/phar/phar_path_check.re (revision 4ee90985) 
1/*
2  +----------------------------------------------------------------------+
3  | phar php single-file executable PHP extension                        |
4  +----------------------------------------------------------------------+
5  | Copyright (c) 2007-2018 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: Marcus Boerger <helly@php.net>                              |
16  +----------------------------------------------------------------------+
17*/
18
19/* $Id$ */
20
21#include "phar_internal.h"
22
23phar_path_check_result phar_path_check(char **s, int *len, const char **error)
24{
25	const unsigned char *p = (const unsigned char*)*s;
26	const unsigned char *m;
27
28	if (*len == 1 && *p == '.') {
29		*error = "current directory reference";
30		return pcr_err_curr_dir;
31	} else if (*len == 2 && p[0] == '.' && p[1] == '.') {
32		*error = "upper directory reference";
33		return pcr_err_up_dir;
34	}
35
36#define YYCTYPE         unsigned char
37#define YYCURSOR        p
38#define YYLIMIT         p+*len
39#define YYMARKER        m
40#define YYFILL(n)
41
42loop:
43/*!re2c
44END     = "\x00";
45NEWLINE = "\r"? "\n";
46UTF8T   = [\x80-\xBF] ;
47UTF8_1  = [\x1A-\x7F] ;
48UTF8_2  = [\xC2-\xDF] UTF8T ;
49UTF8_3A = "\xE0" [\xA0-\xBF] UTF8T ;
50UTF8_3B = [\xE1-\xEC] UTF8T{2} ;
51UTF8_3C = "\xED" [\x80-\x9F] UTF8T ;
52UTF8_3D = [\xEE-\xEF] UTF8T{2} ;
53UTF8_3  = UTF8_3A | UTF8_3B | UTF8_3C | UTF8_3D ;
54UTF8_4A = "\xF0"[\x90-\xBF] UTF8T{2} ;
55UTF8_4B = [\xF1-\xF3] UTF8T{3} ;
56UTF8_4C = "\xF4" [\x80-\x8F] UTF8T{2} ;
57UTF8_4  = UTF8_4A | UTF8_4B | UTF8_4C ;
58UTF8    = UTF8_1 | UTF8_2 | UTF8_3 | UTF8_4 ;
59EOS     = "/" | END;
60ANY     = . | NEWLINE;
61
62"//" 	{
63			*error = "double slash";
64			return pcr_err_double_slash;
65		}
66"/.." EOS {
67			*error = "upper directory reference";
68			return pcr_err_up_dir;
69		}
70"/." EOS {
71			*error = "current directory reference";
72			return pcr_err_curr_dir;
73		}
74"\\" {
75			*error = "back-slash";
76			return pcr_err_back_slash;
77		}
78"*" {
79			*error = "star";
80			return pcr_err_star;
81		}
82"?"	{
83			if (**s == '/') {
84				(*s)++;
85			}
86			*len = (p - (const unsigned char*)*s) -1;
87			*error = NULL;
88			return pcr_use_query;
89		}
90UTF8 {
91			goto loop;
92		}
93END {
94			if (**s == '/') {
95				(*s)++;
96				(*len)--;
97			}
98			if ((p - (const unsigned char*)*s) - 1 != *len)
99			{
100				*error ="illegal character";
101				return pcr_err_illegal_char;
102			}
103			*error = NULL;
104			return pcr_is_ok;
105		}
106ANY {
107			*error ="illegal character";
108			return pcr_err_illegal_char;
109		}
110*/
111}
112