1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #if defined(WIN32) || defined(OS2)
18 #define NEED_ENHANCED_ESCAPES
19 #endif
20
21 #include <stdio.h>
22 #include <string.h>
23 #include <stdio.h>
24 #include <ctype.h>
25
26 /* A bunch of functions in util.c scan strings looking for certain characters.
27 * To make that more efficient we encode a lookup table.
28 */
29 #define T_ESCAPE_SHELL_CMD (0x01)
30 #define T_ESCAPE_PATH_SEGMENT (0x02)
31 #define T_OS_ESCAPE_PATH (0x04)
32 #define T_ESCAPE_ECHO (0x08)
33 #define T_ESCAPE_URLENCODED (0x10)
34 #define T_ESCAPE_XML (0x20)
35
main(int argc,char * argv[])36 int main(int argc, char *argv[])
37 {
38 unsigned c;
39 unsigned char flags;
40
41 printf("/* this file is automatically generated by gen_test_char, "
42 "do not edit. \"make include/private/apr_escape_test_char.h\" to regenerate. */\n"
43 "#define T_ESCAPE_SHELL_CMD (%u)\n"
44 "#define T_ESCAPE_PATH_SEGMENT (%u)\n"
45 "#define T_OS_ESCAPE_PATH (%u)\n"
46 "#define T_ESCAPE_ECHO (%u)\n"
47 "#define T_ESCAPE_URLENCODED (%u)\n"
48 "#define T_ESCAPE_XML (%u)\n"
49 "\n"
50 "static const unsigned char test_char_table[256] = {",
51 T_ESCAPE_SHELL_CMD,
52 T_ESCAPE_PATH_SEGMENT,
53 T_OS_ESCAPE_PATH,
54 T_ESCAPE_ECHO,
55 T_ESCAPE_URLENCODED,
56 T_ESCAPE_XML);
57
58 for (c = 0; c < 256; ++c) {
59 flags = 0;
60 if (c % 20 == 0)
61 printf("\n ");
62
63 /* escape_shell_cmd */
64 #ifdef NEED_ENHANCED_ESCAPES
65 /* Win32/OS2 have many of the same vulnerable characters
66 * as Unix sh, plus the carriage return and percent char.
67 * The proper escaping of these characters varies from unix
68 * since Win32/OS2 use carets or doubled-double quotes,
69 * and neither lf nor cr can be escaped. We escape unix
70 * specific as well, to assure that cross-compiled unix
71 * applications behave similiarly when invoked on win32/os2.
72 *
73 * Rem please keep in-sync with apr's list in win32/filesys.c
74 */
75 if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n\r%", c)) {
76 flags |= T_ESCAPE_SHELL_CMD;
77 }
78 #else
79 if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n", c)) {
80 flags |= T_ESCAPE_SHELL_CMD;
81 }
82 #endif
83
84 if (!isalnum(c) && !strchr("$-_.+!*'(),:@&=~", c)) {
85 flags |= T_ESCAPE_PATH_SEGMENT;
86 }
87
88 if (!isalnum(c) && !strchr("$-_.+!*'(),:@&=/~", c)) {
89 flags |= T_OS_ESCAPE_PATH;
90 }
91
92 if (!isalnum(c) && !strchr(".-*_ ", c)) {
93 flags |= T_ESCAPE_URLENCODED;
94 }
95
96 /* For logging, escape all control characters,
97 * double quotes (because they delimit the request in the log file)
98 * backslashes (because we use backslash for escaping)
99 * and 8-bit chars with the high bit set
100 */
101 if (c && (!isprint(c) || c == '"' || c == '\\' || iscntrl(c))) {
102 flags |= T_ESCAPE_ECHO;
103 }
104
105 if (strchr("<>&\"", c)) {
106 flags |= T_ESCAPE_XML;
107 }
108
109 printf("%u%c", flags, (c < 255) ? ',' : ' ');
110 }
111
112 printf("\n};\n");
113
114 return 0;
115 }
116