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/* Copyright 1999-2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr.h"
#include "apr_lib.h"
#if APR_HAVE_STDIO_H
#include <stdio.h>
#endif
#if APR_HAVE_STRING_H
#include <string.h>
#endif
/* A bunch of functions in util.c scan strings looking for certain characters.
* To make that more efficient we encode a lookup table.
*/
#define T_ESCAPE_SHELL_CMD (0x01)
#define T_ESCAPE_PATH_SEGMENT (0x02)
#define T_OS_ESCAPE_PATH (0x04)
#define T_HTTP_TOKEN_STOP (0x08)
#define T_ESCAPE_LOGITEM (0x10)
#define T_ESCAPE_FORENSIC (0x20)
int main(int argc, char *argv[])
{
unsigned c;
unsigned char flags;
printf("/* this file is automatically generated by gen_test_char, "
"do not edit */\n"
"#define T_ESCAPE_SHELL_CMD (%u)\n"
"#define T_ESCAPE_PATH_SEGMENT (%u)\n"
"#define T_OS_ESCAPE_PATH (%u)\n"
"#define T_HTTP_TOKEN_STOP (%u)\n"
"#define T_ESCAPE_LOGITEM (%u)\n"
"#define T_ESCAPE_FORENSIC (%u)\n"
"\n"
"static const unsigned char test_char_table[256] = {",
T_ESCAPE_SHELL_CMD,
T_ESCAPE_PATH_SEGMENT,
T_OS_ESCAPE_PATH,
T_HTTP_TOKEN_STOP,
T_ESCAPE_LOGITEM,
T_ESCAPE_FORENSIC);
for (c = 0; c < 256; ++c) {
flags = 0;
if (c % 20 == 0)
printf("\n ");
/* escape_shell_cmd */
#if defined(WIN32) || defined(OS2)
/* Win32/OS2 have many of the same vulnerable characters
* as Unix sh, plus the carriage return and percent char.
* The proper escaping of these characters varies from unix
* since Win32/OS2 use carets or doubled-double quotes,
* and neither lf nor cr can be escaped. We escape unix
* specific as well, to assure that cross-compiled unix
* applications behave similiarly when invoked on win32/os2.
*
* Rem please keep in-sync with apr's list in win32/filesys.c
*/
if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n\r%", c)) {
flags |= T_ESCAPE_SHELL_CMD;
}
#else
if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n", c)) {
flags |= T_ESCAPE_SHELL_CMD;
}
#endif
if (!apr_isalnum(c) && !strchr("$-_.+!*'(),:@&=~", c)) {
flags |= T_ESCAPE_PATH_SEGMENT;
}
if (!apr_isalnum(c) && !strchr("$-_.+!*'(),:@&=/~", c)) {
flags |= T_OS_ESCAPE_PATH;
}
/* these are the "tspecials" from RFC2068 */
if (c && (apr_iscntrl(c) || strchr(" \t()<>@,;:\\/[]?={}", c))) {
flags |= T_HTTP_TOKEN_STOP;
}
/* For logging, escape all control characters,
* double quotes (because they delimit the request in the log file)
* backslashes (because we use backslash for escaping)
* and 8-bit chars with the high bit set
*/
if (c && (!apr_isprint(c) || c == '"' || c == '\\' || apr_iscntrl(c))) {
flags |= T_ESCAPE_LOGITEM;
}
/* For forensic logging, escape all control characters, top bit set,
* :, | (used as delimiters) and % (used for escaping).
*/
if (!apr_isprint(c) || c == ':' || c == '|' || c == '%'
|| apr_iscntrl(c) || !c) {
flags |= T_ESCAPE_FORENSIC;
}
printf("%u%c", flags, (c < 255) ? ',' : ' ');
}
printf("\n};\n");
return 0;
}
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