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
32 #if defined(WIN32) || defined(OS2)
33 #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)
55 int main(int argc, char *argv[])
60 printf("/* this file is automatically generated by gen_test_char, "
62 "#define T_ESCAPE_SHELL_CMD (%u)\n"
63 "#define T_ESCAPE_PATH_SEGMENT (%u)\n"
64 "#define T_OS_ESCAPE_PATH (%u)\n"
65 "#define T_HTTP_TOKEN_STOP (%u)\n"
66 "#define T_ESCAPE_LOGITEM (%u)\n"
67 "#define T_ESCAPE_FORENSIC (%u)\n"
69 "static const unsigned char test_char_table[256] = {",
71 T_ESCAPE_PATH_SEGMENT,
77 for (c = 0; c < 256; ++c) {
82 /* escape_shell_cmd */
83 #ifdef NEED_ENHANCED_ESCAPES
84 /* Win32/OS2 have many of the same vulnerable characters
85 * as Unix sh, plus the carriage return and percent char.
86 * The proper escaping of these characters varies from unix
87 * since Win32/OS2 use carets or doubled-double quotes,
88 * and neither lf nor cr can be escaped. We escape unix
89 * specific as well, to assure that cross-compiled unix
90 * applications behave similiarly when invoked on win32/os2.
92 * Rem please keep in-sync with apr's list in win32/filesys.c
94 if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n\r%", c)) {
95 flags |= T_ESCAPE_SHELL_CMD;
98 if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n", c)) {
99 flags |= T_ESCAPE_SHELL_CMD;
103 if (!apr_isalnum(c) && !strchr("$-_.+!*'(),:@&=~", c)) {
104 flags |= T_ESCAPE_PATH_SEGMENT;
107 if (!apr_isalnum(c) && !strchr("$-_.+!*'(),:@&=/~", c)) {
108 flags |= T_OS_ESCAPE_PATH;
111 /* these are the "tspecials" (RFC2068) or "separators" (RFC2616) */
112 if (c && (apr_iscntrl(c) || strchr(" \t()<>@,;:\\\"/[]?={}", c))) {
113 flags |= T_HTTP_TOKEN_STOP;
116 /* For logging, escape all control characters,
117 * double quotes (because they delimit the request in the log file)
118 * backslashes (because we use backslash for escaping)
119 * and 8-bit chars with the high bit set
121 if (c && (!apr_isprint(c) || c == '"' || c == '\\' || apr_iscntrl(c))) {
122 flags |= T_ESCAPE_LOGITEM;
125 /* For forensic logging, escape all control characters, top bit set,
126 * :, | (used as delimiters) and % (used for escaping).
128 if (!apr_isprint(c) || c == ':' || c == '|' || c == '%'
129 || apr_iscntrl(c) || !c) {
130 flags |= T_ESCAPE_FORENSIC;
133 printf("%u%c", flags, (c < 255) ? ',' : ' ');