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#define T_ESCAPE_LDAP_DN (0x40) 36#define T_ESCAPE_LDAP_FILTER (0x80) 37 38int main(int argc, char *argv[]) 39{ 40 unsigned c; 41 unsigned char flags; 42 43 printf("/* this file is automatically generated by gen_test_char, " 44 "do not edit. \"make include/private/apr_escape_test_char.h\" to regenerate. */\n" 45 "#define T_ESCAPE_SHELL_CMD (%u)\n" 46 "#define T_ESCAPE_PATH_SEGMENT (%u)\n" 47 "#define T_OS_ESCAPE_PATH (%u)\n" 48 "#define T_ESCAPE_ECHO (%u)\n" 49 "#define T_ESCAPE_URLENCODED (%u)\n" 50 "#define T_ESCAPE_XML (%u)\n" 51 "#define T_ESCAPE_LDAP_DN (%u)\n" 52 "#define T_ESCAPE_LDAP_FILTER (%u)\n" 53 "\n" 54 "static const unsigned char test_char_table[256] = {", 55 T_ESCAPE_SHELL_CMD, 56 T_ESCAPE_PATH_SEGMENT, 57 T_OS_ESCAPE_PATH, 58 T_ESCAPE_ECHO, 59 T_ESCAPE_URLENCODED, 60 T_ESCAPE_XML, 61 T_ESCAPE_LDAP_DN, 62 T_ESCAPE_LDAP_FILTER); 63 64 for (c = 0; c < 256; ++c) { 65 flags = 0; 66 if (c % 20 == 0) 67 printf("\n "); 68 69 /* escape_shell_cmd */ 70#ifdef NEED_ENHANCED_ESCAPES 71 /* Win32/OS2 have many of the same vulnerable characters 72 * as Unix sh, plus the carriage return and percent char. 73 * The proper escaping of these characters varies from unix 74 * since Win32/OS2 use carets or doubled-double quotes, 75 * and neither lf nor cr can be escaped. We escape unix 76 * specific as well, to assure that cross-compiled unix 77 * applications behave similiarly when invoked on win32/os2. 78 * 79 * Rem please keep in-sync with apr's list in win32/filesys.c 80 */ 81 if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n\r%", c)) { 82 flags |= T_ESCAPE_SHELL_CMD; 83 } 84#else 85 if (c && strchr("&;`'\"|*?~<>^()[]{}$\\\n", c)) { 86 flags |= T_ESCAPE_SHELL_CMD; 87 } 88#endif 89 90 if (!isalnum(c) && !strchr("$-_.+!*'(),:@&=~", c)) { 91 flags |= T_ESCAPE_PATH_SEGMENT; 92 } 93 94 if (!isalnum(c) && !strchr("$-_.+!*'(),:@&=/~", c)) { 95 flags |= T_OS_ESCAPE_PATH; 96 } 97 98 if (!isalnum(c) && !strchr(".-*_ ", c)) { 99 flags |= T_ESCAPE_URLENCODED; 100 } 101 102 /* For logging, escape all control characters, 103 * double quotes (because they delimit the request in the log file) 104 * backslashes (because we use backslash for escaping) 105 * and 8-bit chars with the high bit set 106 */ 107 if (c && (!isprint(c) || c == '"' || c == '\\' || iscntrl(c))) { 108 flags |= T_ESCAPE_ECHO; 109 } 110 111 if (strchr("<>&\"", c)) { 112 flags |= T_ESCAPE_XML; 113 } 114 115 /* LDAP DN escaping (RFC4514) */ 116 if (!isprint(c) || strchr("\"+,;<>\\", c)) { 117 flags |= T_ESCAPE_LDAP_DN; 118 } 119 120 /* LDAP filter escaping (RFC4515) */ 121 if (!isprint(c) || strchr("*()\\", c)) { 122 flags |= T_ESCAPE_LDAP_FILTER; 123 } 124 125 printf("%u%c", flags, (c < 255) ? ',' : ' '); 126 } 127 128 printf("\n};\n"); 129 130 return 0; 131} 132