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de659cbed0
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@420983 13f79535-47bb-0310-9956-ffa450edef68
122 lines
4.1 KiB
C
122 lines
4.1 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "apr.h"
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#include "apr_lib.h"
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#if APR_HAVE_STDIO_H
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#include <stdio.h>
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#endif
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#if APR_HAVE_STRING_H
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#include <string.h>
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#endif
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/* A bunch of functions in util.c scan strings looking for certain characters.
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* To make that more efficient we encode a lookup table.
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*/
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#define T_ESCAPE_SHELL_CMD (0x01)
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#define T_ESCAPE_PATH_SEGMENT (0x02)
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#define T_OS_ESCAPE_PATH (0x04)
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#define T_HTTP_TOKEN_STOP (0x08)
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#define T_ESCAPE_LOGITEM (0x10)
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#define T_ESCAPE_FORENSIC (0x20)
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int main(int argc, char *argv[])
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{
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unsigned c;
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unsigned char flags;
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printf("/* this file is automatically generated by gen_test_char, "
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"do not edit */\n"
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"#define T_ESCAPE_SHELL_CMD (%u)\n"
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"#define T_ESCAPE_PATH_SEGMENT (%u)\n"
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"#define T_OS_ESCAPE_PATH (%u)\n"
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"#define T_HTTP_TOKEN_STOP (%u)\n"
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"#define T_ESCAPE_LOGITEM (%u)\n"
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"#define T_ESCAPE_FORENSIC (%u)\n"
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"\n"
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"static const unsigned char test_char_table[256] = {",
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T_ESCAPE_SHELL_CMD,
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T_ESCAPE_PATH_SEGMENT,
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T_OS_ESCAPE_PATH,
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T_HTTP_TOKEN_STOP,
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T_ESCAPE_LOGITEM,
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T_ESCAPE_FORENSIC);
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for (c = 0; c < 256; ++c) {
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flags = 0;
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if (c % 20 == 0)
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printf("\n ");
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/* escape_shell_cmd */
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#if defined(WIN32) || defined(OS2)
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/* Win32/OS2 have many of the same vulnerable characters
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* as Unix sh, plus the carriage return and percent char.
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* The proper escaping of these characters varies from unix
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* since Win32/OS2 use carets or doubled-double quotes,
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* and neither lf nor cr can be escaped. We escape unix
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* specific as well, to assure that cross-compiled unix
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* applications behave similiarly when invoked on win32/os2.
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*
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* Rem please keep in-sync with apr's list in win32/filesys.c
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*/
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if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n\r%", c)) {
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flags |= T_ESCAPE_SHELL_CMD;
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}
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#else
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if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n", c)) {
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flags |= T_ESCAPE_SHELL_CMD;
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}
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#endif
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if (!apr_isalnum(c) && !strchr("$-_.+!*'(),:@&=~", c)) {
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flags |= T_ESCAPE_PATH_SEGMENT;
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}
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if (!apr_isalnum(c) && !strchr("$-_.+!*'(),:@&=/~", c)) {
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flags |= T_OS_ESCAPE_PATH;
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}
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/* these are the "tspecials" from RFC2068 */
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if (c && (apr_iscntrl(c) || strchr(" \t()<>@,;:\\/[]?={}", c))) {
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flags |= T_HTTP_TOKEN_STOP;
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}
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/* For logging, escape all control characters,
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* double quotes (because they delimit the request in the log file)
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* backslashes (because we use backslash for escaping)
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* and 8-bit chars with the high bit set
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*/
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if (c && (!apr_isprint(c) || c == '"' || c == '\\' || apr_iscntrl(c))) {
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flags |= T_ESCAPE_LOGITEM;
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}
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/* For forensic logging, escape all control characters, top bit set,
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* :, | (used as delimiters) and % (used for escaping).
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*/
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if (!apr_isprint(c) || c == ':' || c == '|' || c == '%'
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|| apr_iscntrl(c) || !c) {
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flags |= T_ESCAPE_FORENSIC;
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}
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printf("%u%c", flags, (c < 255) ? ',' : ' ');
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}
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printf("\n};\n");
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return 0;
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}
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