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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #define apr_isalnum(c) (isalnum(((unsigned char)(c))))
20 #define apr_isalpha(c) (isalpha(((unsigned char)(c))))
21 #define apr_iscntrl(c) (iscntrl(((unsigned char)(c))))
22 #define apr_isprint(c) (isprint(((unsigned char)(c))))
24 #define APR_HAVE_STDIO_H 1
25 #define APR_HAVE_STRING_H 1
34 #if defined(WIN32) || defined(OS2)
35 #define NEED_ENHANCED_ESCAPES
45 /* A bunch of functions in util.c scan strings looking for certain characters.
46 * To make that more efficient we encode a lookup table.
48 #define T_ESCAPE_SHELL_CMD (0x01)
49 #define T_ESCAPE_PATH_SEGMENT (0x02)
50 #define T_OS_ESCAPE_PATH (0x04)
51 #define T_HTTP_TOKEN_STOP (0x08)
52 #define T_ESCAPE_LOGITEM (0x10)
53 #define T_ESCAPE_FORENSIC (0x20)
54 #define T_ESCAPE_URLENCODED (0x40)
56 int main(int argc, char *argv[])
61 printf("/* this file is automatically generated by gen_test_char, "
63 "#define T_ESCAPE_SHELL_CMD (%u)\n"
64 "#define T_ESCAPE_PATH_SEGMENT (%u)\n"
65 "#define T_OS_ESCAPE_PATH (%u)\n"
66 "#define T_HTTP_TOKEN_STOP (%u)\n"
67 "#define T_ESCAPE_LOGITEM (%u)\n"
68 "#define T_ESCAPE_FORENSIC (%u)\n"
69 "#define T_ESCAPE_URLENCODED (%u)\n"
71 "static const unsigned char test_char_table[256] = {",
73 T_ESCAPE_PATH_SEGMENT,
80 for (c = 0; c < 256; ++c) {
85 /* escape_shell_cmd */
86 #ifdef NEED_ENHANCED_ESCAPES
87 /* Win32/OS2 have many of the same vulnerable characters
88 * as Unix sh, plus the carriage return and percent char.
89 * The proper escaping of these characters varies from unix
90 * since Win32/OS2 use carets or doubled-double quotes,
91 * and neither lf nor cr can be escaped. We escape unix
92 * specific as well, to assure that cross-compiled unix
93 * applications behave similiarly when invoked on win32/os2.
95 * Rem please keep in-sync with apr's list in win32/filesys.c
97 if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n\r%", c)) {
98 flags |= T_ESCAPE_SHELL_CMD;
101 if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n", c)) {
102 flags |= T_ESCAPE_SHELL_CMD;
106 if (!apr_isalnum(c) && !strchr("$-_.+!*'(),:@&=~", c)) {
107 flags |= T_ESCAPE_PATH_SEGMENT;
110 if (!apr_isalnum(c) && !strchr("$-_.+!*'(),:@&=/~", c)) {
111 flags |= T_OS_ESCAPE_PATH;
114 if (!apr_isalnum(c) && !strchr(".-*_ ", c)) {
115 flags |= T_ESCAPE_URLENCODED;
118 /* these are the "tspecials" (RFC2068) or "separators" (RFC2616) */
119 if (c && (apr_iscntrl(c) || strchr(" \t()<>@,;:\\\"/[]?={}", c))) {
120 flags |= T_HTTP_TOKEN_STOP;
123 /* For logging, escape all control characters,
124 * double quotes (because they delimit the request in the log file)
125 * backslashes (because we use backslash for escaping)
126 * and 8-bit chars with the high bit set
128 if (c && (!apr_isprint(c) || c == '"' || c == '\\' || apr_iscntrl(c))) {
129 flags |= T_ESCAPE_LOGITEM;
132 /* For forensic logging, escape all control characters, top bit set,
133 * :, | (used as delimiters) and % (used for escaping).
135 if (!apr_isprint(c) || c == ':' || c == '|' || c == '%'
136 || apr_iscntrl(c) || !c) {
137 flags |= T_ESCAPE_FORENSIC;
140 printf("%u%c", flags, (c < 255) ? ',' : ' ');