| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| /* escape/unescape functions. |
| * |
| * These functions perform various escaping operations, and are provided in |
| * pairs, a function to query the length of and escape existing buffers, as |
| * well as companion functions to perform the same process to memory |
| * allocated from a pool. |
| * |
| * The API is designed to have the smallest possible RAM footprint, and so |
| * will only allocate the exact amount of RAM needed for each conversion. |
| */ |
| |
| #include "apr_escape.h" |
| #include "apr_escape_test_char.h" |
| #include "apr_lib.h" |
| #include "apr_strings.h" |
| |
| #if APR_CHARSET_EBCDIC |
| static int convert_a2e[256] = { |
| 0x00, 0x01, 0x02, 0x03, 0x37, 0x2D, 0x2E, 0x2F, 0x16, 0x05, 0x15, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, |
| 0x10, 0x11, 0x12, 0x13, 0x3C, 0x3D, 0x32, 0x26, 0x18, 0x19, 0x3F, 0x27, 0x1C, 0x1D, 0x1E, 0x1F, |
| 0x40, 0x5A, 0x7F, 0x7B, 0x5B, 0x6C, 0x50, 0x7D, 0x4D, 0x5D, 0x5C, 0x4E, 0x6B, 0x60, 0x4B, 0x61, |
| 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0x7A, 0x5E, 0x4C, 0x7E, 0x6E, 0x6F, |
| 0x7C, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, |
| 0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xAD, 0xE0, 0xBD, 0x5F, 0x6D, |
| 0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, |
| 0x97, 0x98, 0x99, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xC0, 0x4F, 0xD0, 0xA1, 0x07, |
| 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x06, 0x17, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x09, 0x0A, 0x1B, |
| 0x30, 0x31, 0x1A, 0x33, 0x34, 0x35, 0x36, 0x08, 0x38, 0x39, 0x3A, 0x3B, 0x04, 0x14, 0x3E, 0xFF, |
| 0x41, 0xAA, 0x4A, 0xB1, 0x9F, 0xB2, 0x6A, 0xB5, 0xBB, 0xB4, 0x9A, 0x8A, 0xB0, 0xCA, 0xAF, 0xBC, |
| 0x90, 0x8F, 0xEA, 0xFA, 0xBE, 0xA0, 0xB6, 0xB3, 0x9D, 0xDA, 0x9B, 0x8B, 0xB7, 0xB8, 0xB9, 0xAB, |
| 0x64, 0x65, 0x62, 0x66, 0x63, 0x67, 0x9E, 0x68, 0x74, 0x71, 0x72, 0x73, 0x78, 0x75, 0x76, 0x77, |
| 0xAC, 0x69, 0xED, 0xEE, 0xEB, 0xEF, 0xEC, 0xBF, 0x80, 0xFD, 0xFE, 0xFB, 0xFC, 0xBA, 0xAE, 0x59, |
| 0x44, 0x45, 0x42, 0x46, 0x43, 0x47, 0x9C, 0x48, 0x54, 0x51, 0x52, 0x53, 0x58, 0x55, 0x56, 0x57, |
| 0x8C, 0x49, 0xCD, 0xCE, 0xCB, 0xCF, 0xCC, 0xE1, 0x70, 0xDD, 0xDE, 0xDB, 0xDC, 0x8D, 0x8E, 0xDF }; |
| |
| static int convert_e2a[256] = { |
| 0x00, 0x01, 0x02, 0x03, 0x9C, 0x09, 0x86, 0x7F, 0x97, 0x8D, 0x8E, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, |
| 0x10, 0x11, 0x12, 0x13, 0x9D, 0x0A, 0x08, 0x87, 0x18, 0x19, 0x92, 0x8F, 0x1C, 0x1D, 0x1E, 0x1F, |
| 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x17, 0x1B, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x05, 0x06, 0x07, |
| 0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04, 0x98, 0x99, 0x9A, 0x9B, 0x14, 0x15, 0x9E, 0x1A, |
| 0x20, 0xA0, 0xE2, 0xE4, 0xE0, 0xE1, 0xE3, 0xE5, 0xE7, 0xF1, 0xA2, 0x2E, 0x3C, 0x28, 0x2B, 0x7C, |
| 0x26, 0xE9, 0xEA, 0xEB, 0xE8, 0xED, 0xEE, 0xEF, 0xEC, 0xDF, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0x5E, |
| 0x2D, 0x2F, 0xC2, 0xC4, 0xC0, 0xC1, 0xC3, 0xC5, 0xC7, 0xD1, 0xA6, 0x2C, 0x25, 0x5F, 0x3E, 0x3F, |
| 0xF8, 0xC9, 0xCA, 0xCB, 0xC8, 0xCD, 0xCE, 0xCF, 0xCC, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22, |
| 0xD8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0xAB, 0xBB, 0xF0, 0xFD, 0xFE, 0xB1, |
| 0xB0, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0xAA, 0xBA, 0xE6, 0xB8, 0xC6, 0xA4, |
| 0xB5, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0xA1, 0xBF, 0xD0, 0x5B, 0xDE, 0xAE, |
| 0xAC, 0xA3, 0xA5, 0xB7, 0xA9, 0xA7, 0xB6, 0xBC, 0xBD, 0xBE, 0xDD, 0xA8, 0xAF, 0x5D, 0xB4, 0xD7, |
| 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0xAD, 0xF4, 0xF6, 0xF2, 0xF3, 0xF5, |
| 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0xB9, 0xFB, 0xFC, 0xF9, 0xFA, 0xFF, |
| 0x5C, 0xF7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0xB2, 0xD4, 0xD6, 0xD2, 0xD3, 0xD5, |
| 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0xB3, 0xDB, 0xDC, 0xD9, 0xDA, 0x9F }; |
| #define RAW_ASCII_CHAR(ch) convert_e2a[(unsigned char)ch] |
| #else /* APR_CHARSET_EBCDIC */ |
| #define RAW_ASCII_CHAR(ch) (ch) |
| #endif /* !APR_CHARSET_EBCDIC */ |
| |
| /* we assume the folks using this ensure 0 <= c < 256... which means |
| * you need a cast to (unsigned char) first, you can't just plug a |
| * char in here and get it to work, because if char is signed then it |
| * will first be sign extended. |
| */ |
| #define TEST_CHAR(c, f) (test_char_table[(unsigned)(c)] & (f)) |
| |
| APR_DECLARE(apr_status_t) apr_escape_shell(char *escaped, const char *str, |
| apr_ssize_t slen, apr_size_t *len) |
| { |
| unsigned char *d; |
| const unsigned char *s; |
| apr_size_t size = 1; |
| int found = 0; |
| |
| d = (unsigned char *) escaped; |
| s = (const unsigned char *) str; |
| |
| if (s) { |
| if (d) { |
| for (; *s && slen; ++s, slen--) { |
| #if defined(OS2) || defined(WIN32) |
| /* |
| * Newlines to Win32/OS2 CreateProcess() are ill advised. |
| * Convert them to spaces since they are effectively white |
| * space to most applications |
| */ |
| if (*s == '\r' || *s == '\n') { |
| if (d) { |
| *d++ = ' '; |
| found = 1; |
| } |
| continue; |
| } |
| #endif |
| if (TEST_CHAR(*s, T_ESCAPE_SHELL_CMD)) { |
| *d++ = '\\'; |
| size++; |
| found = 1; |
| } |
| *d++ = *s; |
| size++; |
| } |
| *d = '\0'; |
| } |
| else { |
| for (; *s && slen; ++s, slen--) { |
| if (TEST_CHAR(*s, T_ESCAPE_SHELL_CMD)) { |
| size++; |
| found = 1; |
| } |
| size++; |
| } |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (!found) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_pescape_shell(apr_pool_t *p, const char *str) |
| { |
| apr_size_t len; |
| |
| switch (apr_escape_shell(NULL, str, APR_ESCAPE_STRING, &len)) { |
| case APR_SUCCESS: { |
| char *cmd = apr_palloc(p, len); |
| apr_escape_shell(cmd, str, APR_ESCAPE_STRING, NULL); |
| return cmd; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return str; |
| } |
| |
| static char x2c(const char *what) |
| { |
| register char digit; |
| |
| #if !APR_CHARSET_EBCDIC |
| digit = |
| ((what[0] >= 'A') ? ((what[0] & 0xdf) - 'A') + 10 : (what[0] - '0')); |
| digit *= 16; |
| digit += (what[1] >= 'A' ? ((what[1] & 0xdf) - 'A') + 10 : (what[1] - '0')); |
| #else /*APR_CHARSET_EBCDIC*/ |
| char xstr[5]; |
| xstr[0]='0'; |
| xstr[1]='x'; |
| xstr[2]=what[0]; |
| xstr[3]=what[1]; |
| xstr[4]='\0'; |
| digit = convert_a2e[0xFF & strtol(xstr, NULL, 16)]; |
| #endif /*APR_CHARSET_EBCDIC*/ |
| return (digit); |
| } |
| |
| APR_DECLARE(apr_status_t) apr_unescape_url(char *escaped, const char *url, |
| apr_ssize_t slen, const char *forbid, const char *reserved, int plus, |
| apr_size_t *len) |
| { |
| apr_size_t size = 1; |
| int found = 0; |
| const char *s = (const char *) url; |
| char *d = (char *) escaped; |
| register int badesc, badpath; |
| |
| if (!url) { |
| return APR_NOTFOUND; |
| } |
| |
| badesc = 0; |
| badpath = 0; |
| if (s) { |
| if (d) { |
| for (; *s && slen; ++s, d++, slen--) { |
| if (plus && *s == '+') { |
| *d = ' '; |
| found = 1; |
| } |
| else if (*s != '%') { |
| *d = *s; |
| } |
| else { |
| if (!apr_isxdigit(*(s + 1)) || !apr_isxdigit(*(s + 2))) { |
| badesc = 1; |
| *d = '%'; |
| } |
| else { |
| char decoded; |
| decoded = x2c(s + 1); |
| if ((decoded == '\0') |
| || (forbid && strchr(forbid, decoded))) { |
| badpath = 1; |
| *d = decoded; |
| s += 2; |
| slen -= 2; |
| } |
| else if (reserved && strchr(reserved, decoded)) { |
| *d++ = *s++; |
| *d++ = *s++; |
| *d = *s; |
| size += 2; |
| } |
| else { |
| *d = decoded; |
| s += 2; |
| slen -= 2; |
| found = 1; |
| } |
| } |
| } |
| size++; |
| } |
| *d = '\0'; |
| } |
| else { |
| for (; *s && slen; ++s, slen--) { |
| if (plus && *s == '+') { |
| found = 1; |
| } |
| else if (*s != '%') { |
| /* character unchanged */ |
| } |
| else { |
| if (!apr_isxdigit(*(s + 1)) || !apr_isxdigit(*(s + 2))) { |
| badesc = 1; |
| } |
| else { |
| char decoded; |
| decoded = x2c(s + 1); |
| if ((decoded == '\0') |
| || (forbid && strchr(forbid, decoded))) { |
| badpath = 1; |
| s += 2; |
| slen -= 2; |
| } |
| else if (reserved && strchr(reserved, decoded)) { |
| s += 2; |
| slen -= 2; |
| size += 2; |
| } |
| else { |
| s += 2; |
| slen -= 2; |
| found = 1; |
| } |
| } |
| } |
| size++; |
| } |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (badesc) { |
| return APR_EINVAL; |
| } |
| else if (badpath) { |
| return APR_BADCH; |
| } |
| else if (!found) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_punescape_url(apr_pool_t *p, const char *url, |
| const char *forbid, const char *reserved, int plus) |
| { |
| apr_size_t len; |
| |
| switch (apr_unescape_url(NULL, url, APR_ESCAPE_STRING, forbid, reserved, |
| plus, &len)) { |
| case APR_SUCCESS: { |
| char *buf = apr_palloc(p, len); |
| apr_unescape_url(buf, url, APR_ESCAPE_STRING, forbid, reserved, plus, |
| NULL); |
| return buf; |
| } |
| case APR_EINVAL: |
| case APR_BADCH: { |
| return NULL; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return url; |
| } |
| |
| /* c2x takes an unsigned, and expects the caller has guaranteed that |
| * 0 <= what < 256... which usually means that you have to cast to |
| * unsigned char first, because (unsigned)(char)(x) first goes through |
| * signed extension to an int before the unsigned cast. |
| * |
| * The reason for this assumption is to assist gcc code generation -- |
| * the unsigned char -> unsigned extension is already done earlier in |
| * both uses of this code, so there's no need to waste time doing it |
| * again. |
| */ |
| static const char c2x_table[] = "0123456789abcdef"; |
| |
| static APR_INLINE unsigned char *c2x(unsigned what, unsigned char prefix, |
| unsigned char *where) |
| { |
| #if APR_CHARSET_EBCDIC |
| what = convert_e2a[(unsigned char)what]; |
| #endif /*APR_CHARSET_EBCDIC*/ |
| *where++ = prefix; |
| *where++ = c2x_table[what >> 4]; |
| *where++ = c2x_table[what & 0xf]; |
| return where; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_escape_path_segment(char *escaped, |
| const char *str, apr_ssize_t slen, apr_size_t *len) |
| { |
| apr_size_t size = 1; |
| int found = 0; |
| const unsigned char *s = (const unsigned char *) str; |
| unsigned char *d = (unsigned char *) escaped; |
| unsigned c; |
| |
| if (s) { |
| if (d) { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_ESCAPE_PATH_SEGMENT)) { |
| d = c2x(c, '%', d); |
| size += 2; |
| found = 1; |
| } |
| else { |
| *d++ = c; |
| } |
| ++s; |
| size++; |
| slen--; |
| } |
| *d = '\0'; |
| } |
| else { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_ESCAPE_PATH_SEGMENT)) { |
| size += 2; |
| found = 1; |
| } |
| ++s; |
| size++; |
| slen--; |
| } |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (!found) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_pescape_path_segment(apr_pool_t *p, |
| const char *str) |
| { |
| apr_size_t len; |
| |
| switch (apr_escape_path_segment(NULL, str, APR_ESCAPE_STRING, &len)) { |
| case APR_SUCCESS: { |
| char *cmd = apr_palloc(p, len); |
| apr_escape_path_segment(cmd, str, APR_ESCAPE_STRING, NULL); |
| return cmd; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return str; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_escape_path(char *escaped, const char *path, |
| apr_ssize_t slen, int partial, apr_size_t *len) |
| { |
| apr_size_t size = 1; |
| int found = 0; |
| const unsigned char *s = (const unsigned char *) path; |
| unsigned char *d = (unsigned char *) escaped; |
| unsigned c; |
| |
| if (!path) { |
| return APR_NOTFOUND; |
| } |
| |
| if (!partial) { |
| const char *colon = strchr(path, ':'); |
| const char *slash = strchr(path, '/'); |
| |
| if (colon && (!slash || colon < slash)) { |
| if (d) { |
| *d++ = '.'; |
| *d++ = '/'; |
| } |
| size += 2; |
| found = 1; |
| } |
| } |
| if (d) { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_OS_ESCAPE_PATH)) { |
| d = c2x(c, '%', d); |
| size += 2; |
| found = 1; |
| } |
| else { |
| *d++ = c; |
| } |
| ++s; |
| size++; |
| slen--; |
| } |
| *d = '\0'; |
| } |
| else { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_OS_ESCAPE_PATH)) { |
| size += 2; |
| found = 1; |
| } |
| ++s; |
| size++; |
| slen--; |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (!found) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_pescape_path(apr_pool_t *p, const char *str, |
| int partial) |
| { |
| apr_size_t len; |
| |
| switch (apr_escape_path(NULL, str, APR_ESCAPE_STRING, partial, &len)) { |
| case APR_SUCCESS: { |
| char *path = apr_palloc(p, len); |
| apr_escape_path(path, str, APR_ESCAPE_STRING, partial, NULL); |
| return path; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return str; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_escape_urlencoded(char *escaped, const char *str, |
| apr_ssize_t slen, apr_size_t *len) |
| { |
| apr_size_t size = 1; |
| int found = 0; |
| const unsigned char *s = (const unsigned char *) str; |
| unsigned char *d = (unsigned char *) escaped; |
| unsigned c; |
| |
| if (s) { |
| if (d) { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_ESCAPE_URLENCODED)) { |
| d = c2x(c, '%', d); |
| size += 2; |
| found = 1; |
| } |
| else if (c == ' ') { |
| *d++ = '+'; |
| found = 1; |
| } |
| else { |
| *d++ = c; |
| } |
| ++s; |
| size++; |
| slen--; |
| } |
| *d = '\0'; |
| } |
| else { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_ESCAPE_URLENCODED)) { |
| size += 2; |
| found = 1; |
| } |
| else if (c == ' ') { |
| found = 1; |
| } |
| ++s; |
| size++; |
| slen--; |
| } |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (!found) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_pescape_urlencoded(apr_pool_t *p, const char *str) |
| { |
| apr_size_t len; |
| |
| switch (apr_escape_urlencoded(NULL, str, APR_ESCAPE_STRING, &len)) { |
| case APR_SUCCESS: { |
| char *encoded = apr_palloc(p, len); |
| apr_escape_urlencoded(encoded, str, APR_ESCAPE_STRING, NULL); |
| return encoded; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return str; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_escape_entity(char *escaped, const char *str, |
| apr_ssize_t slen, int toasc, apr_size_t *len) |
| { |
| apr_size_t size = 1; |
| int found = 0; |
| const unsigned char *s = (const unsigned char *) str; |
| unsigned char *d = (unsigned char *) escaped; |
| unsigned c; |
| |
| if (s) { |
| if (d) { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_ESCAPE_XML)) { |
| switch (c) { |
| case '>': { |
| memcpy(d, ">", 4); |
| size += 4; |
| d += 4; |
| break; |
| } |
| case '<': { |
| memcpy(d, "<", 4); |
| size += 4; |
| d += 4; |
| break; |
| } |
| case '&': { |
| memcpy(d, "&", 5); |
| size += 5; |
| d += 5; |
| break; |
| } |
| case '\"': { |
| memcpy(d, """, 6); |
| size += 6; |
| d += 6; |
| break; |
| } |
| case '\'': { |
| memcpy(d, "'", 6); |
| size += 6; |
| d += 6; |
| break; |
| } |
| } |
| found = 1; |
| } |
| else if (toasc && !apr_isascii(c)) { |
| int offset = apr_snprintf((char *) d, 6, "&#%3.3d;", c); |
| size += offset; |
| d += offset; |
| found = 1; |
| } |
| else { |
| *d++ = c; |
| size++; |
| } |
| ++s; |
| slen--; |
| } |
| *d = '\0'; |
| } |
| else { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_ESCAPE_XML)) { |
| switch (c) { |
| case '>': { |
| size += 4; |
| break; |
| } |
| case '<': { |
| size += 4; |
| break; |
| } |
| case '&': { |
| size += 5; |
| break; |
| } |
| case '\"': { |
| size += 6; |
| break; |
| } |
| case '\'': { |
| size += 6; |
| break; |
| } |
| } |
| found = 1; |
| } |
| else if (toasc && !apr_isascii(c)) { |
| char buf[8]; |
| size += apr_snprintf(buf, 6, "&#%3.3d;", c); |
| found = 1; |
| } |
| else { |
| size++; |
| } |
| ++s; |
| slen--; |
| } |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (!found) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_pescape_entity(apr_pool_t *p, const char *str, |
| int toasc) |
| { |
| apr_size_t len; |
| |
| switch (apr_escape_entity(NULL, str, APR_ESCAPE_STRING, toasc, &len)) { |
| case APR_SUCCESS: { |
| char *cmd = apr_palloc(p, len); |
| apr_escape_entity(cmd, str, APR_ESCAPE_STRING, toasc, NULL); |
| return cmd; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return str; |
| } |
| |
| /* maximum length of any ISO-LATIN-1 HTML entity name. */ |
| #define MAXENTLEN (6) |
| |
| APR_DECLARE(apr_status_t) apr_unescape_entity(char *unescaped, const char *str, |
| apr_ssize_t slen, apr_size_t *len) |
| { |
| int found = 0; |
| apr_size_t size = 1; |
| int val, i, j; |
| char *d = unescaped; |
| const char *s = str; |
| const char *ents; |
| static const char * const entlist[MAXENTLEN + 1] = |
| { |
| NULL, /* 0 */ |
| NULL, /* 1 */ |
| "lt\074gt\076", /* 2 */ |
| "amp\046ETH\320eth\360", /* 3 */ |
| "quot\042Auml\304Euml\313Iuml\317Ouml\326Uuml\334auml\344euml" |
| "\353iuml\357ouml\366uuml\374yuml\377", /* 4 */ |
| "Acirc\302Aring\305AElig\306Ecirc\312Icirc\316Ocirc\324Ucirc" |
| "\333THORN\336szlig\337acirc\342aring\345aelig\346ecirc\352" |
| "icirc\356ocirc\364ucirc\373thorn\376", /* 5 */ |
| "Agrave\300Aacute\301Atilde\303Ccedil\307Egrave\310Eacute\311" |
| "Igrave\314Iacute\315Ntilde\321Ograve\322Oacute\323Otilde" |
| "\325Oslash\330Ugrave\331Uacute\332Yacute\335agrave\340" |
| "aacute\341atilde\343ccedil\347egrave\350eacute\351igrave" |
| "\354iacute\355ntilde\361ograve\362oacute\363otilde\365" |
| "oslash\370ugrave\371uacute\372yacute\375" /* 6 */ |
| }; |
| |
| if (s) { |
| if (d) { |
| for (; *s != '\0' && slen; s++, d++, size++, slen--) { |
| if (*s != '&') { |
| *d = *s; |
| continue; |
| } |
| /* find end of entity */ |
| for (i = 1; s[i] != ';' && s[i] != '\0' && (slen - i) != 0; |
| i++) { |
| continue; |
| } |
| |
| if (s[i] == '\0' || (slen - i) == 0) { /* treat as normal data */ |
| *d = *s; |
| continue; |
| } |
| |
| /* is it numeric ? */ |
| if (s[1] == '#') { |
| for (j = 2, val = 0; j < i && apr_isdigit(s[j]); j++) { |
| val = val * 10 + s[j] - '0'; |
| } |
| s += i; |
| if (j < i || val <= 8 || (val >= 11 && val <= 31) |
| || (val >= 127 && val <= 160) || val >= 256) { |
| d--; /* no data to output */ |
| size--; |
| } |
| else { |
| *d = RAW_ASCII_CHAR(val); |
| found = 1; |
| } |
| } |
| else { |
| j = i - 1; |
| if (j > MAXENTLEN || entlist[j] == NULL) { |
| /* wrong length */ |
| *d = '&'; |
| continue; /* skip it */ |
| } |
| for (ents = entlist[j]; *ents != '\0'; ents += i) { |
| if (strncmp(s + 1, ents, j) == 0) { |
| break; |
| } |
| } |
| |
| if (*ents == '\0') { |
| *d = '&'; /* unknown */ |
| } |
| else { |
| *d = RAW_ASCII_CHAR(((const unsigned char *) ents)[j]); |
| s += i; |
| slen -= i; |
| found = 1; |
| } |
| } |
| } |
| *d = '\0'; |
| } |
| else { |
| for (; *s != '\0' && slen; s++, size++, slen--) { |
| if (*s != '&') { |
| continue; |
| } |
| /* find end of entity */ |
| for (i = 1; s[i] != ';' && s[i] != '\0' && (slen - i) != 0; |
| i++) { |
| continue; |
| } |
| |
| if (s[i] == '\0' || (slen - i) == 0) { /* treat as normal data */ |
| continue; |
| } |
| |
| /* is it numeric ? */ |
| if (s[1] == '#') { |
| for (j = 2, val = 0; j < i && apr_isdigit(s[j]); j++) { |
| val = val * 10 + s[j] - '0'; |
| } |
| s += i; |
| if (j < i || val <= 8 || (val >= 11 && val <= 31) |
| || (val >= 127 && val <= 160) || val >= 256) { |
| /* no data to output */ |
| size--; |
| } |
| else { |
| found = 1; |
| } |
| } |
| else { |
| j = i - 1; |
| if (j > MAXENTLEN || entlist[j] == NULL) { |
| /* wrong length */ |
| continue; /* skip it */ |
| } |
| for (ents = entlist[j]; *ents != '\0'; ents += i) { |
| if (strncmp(s + 1, ents, j) == 0) { |
| break; |
| } |
| } |
| |
| if (*ents == '\0') { |
| /* unknown */ |
| } |
| else { |
| s += i; |
| slen -= i; |
| found = 1; |
| } |
| } |
| } |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (!found) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_punescape_entity(apr_pool_t *p, const char *str) |
| { |
| apr_size_t len; |
| |
| switch (apr_unescape_entity(NULL, str, APR_ESCAPE_STRING, &len)) { |
| case APR_SUCCESS: { |
| char *cmd = apr_palloc(p, len); |
| apr_unescape_entity(cmd, str, APR_ESCAPE_STRING, NULL); |
| return cmd; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return str; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_escape_echo(char *escaped, const char *str, |
| apr_ssize_t slen, int quote, apr_size_t *len) |
| { |
| apr_size_t size = 1; |
| int found = 0; |
| const unsigned char *s = (const unsigned char *) str; |
| unsigned char *d = (unsigned char *) escaped; |
| unsigned c; |
| |
| if (s) { |
| if (d) { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_ESCAPE_ECHO)) { |
| *d++ = '\\'; |
| size++; |
| switch (c) { |
| case '\a': |
| *d++ = 'a'; |
| size++; |
| found = 1; |
| break; |
| case '\b': |
| *d++ = 'b'; |
| size++; |
| found = 1; |
| break; |
| case '\f': |
| *d++ = 'f'; |
| size++; |
| found = 1; |
| break; |
| case '\n': |
| *d++ = 'n'; |
| size++; |
| found = 1; |
| break; |
| case '\r': |
| *d++ = 'r'; |
| size++; |
| found = 1; |
| break; |
| case '\t': |
| *d++ = 't'; |
| size++; |
| found = 1; |
| break; |
| case '\v': |
| *d++ = 'v'; |
| size++; |
| found = 1; |
| break; |
| case '\\': |
| *d++ = '\\'; |
| size++; |
| found = 1; |
| break; |
| case '"': |
| if (quote) { |
| *d++ = c; |
| size++; |
| found = 1; |
| } |
| else { |
| d[-1] = c; |
| } |
| break; |
| default: |
| c2x(c, 'x', d); |
| d += 3; |
| size += 3; |
| found = 1; |
| break; |
| } |
| } |
| else { |
| *d++ = c; |
| size++; |
| } |
| ++s; |
| slen--; |
| } |
| *d = '\0'; |
| } |
| else { |
| while ((c = *s) && slen) { |
| if (TEST_CHAR(c, T_ESCAPE_ECHO)) { |
| size++; |
| switch (c) { |
| case '\a': |
| case '\b': |
| case '\f': |
| case '\n': |
| case '\r': |
| case '\t': |
| case '\v': |
| case '\\': |
| size++; |
| found = 1; |
| break; |
| case '"': |
| if (quote) { |
| size++; |
| found = 1; |
| } |
| break; |
| default: |
| size += 3; |
| found = 1; |
| break; |
| } |
| } |
| else { |
| size++; |
| } |
| ++s; |
| slen--; |
| } |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (!found) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_pescape_echo(apr_pool_t *p, const char *str, |
| int quote) |
| { |
| apr_size_t len; |
| |
| switch (apr_escape_echo(NULL, str, APR_ESCAPE_STRING, quote, &len)) { |
| case APR_SUCCESS: { |
| char *cmd = apr_palloc(p, len); |
| apr_escape_echo(cmd, str, APR_ESCAPE_STRING, quote, NULL); |
| return cmd; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return str; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_escape_hex(char *dest, const void *src, |
| apr_size_t srclen, int colon, apr_size_t *len) |
| { |
| const unsigned char *in = src; |
| apr_size_t size; |
| |
| if (!src) { |
| return APR_NOTFOUND; |
| } |
| |
| if (dest) { |
| for (size = 0; size < srclen; size++) { |
| if (colon && size) { |
| *dest++ = ':'; |
| } |
| *dest++ = c2x_table[in[size] >> 4]; |
| *dest++ = c2x_table[in[size] & 0xf]; |
| } |
| *dest = '\0'; |
| } |
| |
| if (len) { |
| if (colon && srclen) { |
| *len = srclen * 3; |
| } |
| else { |
| *len = srclen * 2 + 1; |
| } |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const char *) apr_pescape_hex(apr_pool_t *p, const void *src, |
| apr_size_t srclen, int colon) |
| { |
| apr_size_t len; |
| |
| switch (apr_escape_hex(NULL, src, srclen, colon, &len)) { |
| case APR_SUCCESS: { |
| char *cmd = apr_palloc(p, len); |
| apr_escape_hex(cmd, src, srclen, colon, NULL); |
| return cmd; |
| } |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return src; |
| } |
| |
| APR_DECLARE(apr_status_t) apr_unescape_hex(void *dest, const char *str, |
| apr_ssize_t slen, int colon, apr_size_t *len) |
| { |
| apr_size_t size = 0; |
| int flip = 0; |
| const unsigned char *s = (const unsigned char *) str; |
| unsigned char *d = (unsigned char *) dest; |
| unsigned c; |
| unsigned char u = 0; |
| |
| if (s) { |
| if (d) { |
| while ((c = *s) && slen) { |
| |
| if (!flip) { |
| u = 0; |
| } |
| |
| if (colon && c == ':' && !flip) { |
| ++s; |
| slen--; |
| continue; |
| } |
| else if (apr_isdigit(c)) { |
| u |= c - '0'; |
| } |
| else if (apr_isupper(c) && c <= 'F') { |
| u |= c - ('A' - 10); |
| } |
| else if (apr_islower(c) && c <= 'f') { |
| u |= c - ('a' - 10); |
| } |
| else { |
| return APR_BADCH; |
| } |
| |
| if (flip) { |
| *d++ = u; |
| size++; |
| } |
| else { |
| u <<= 4; |
| *d = u; |
| } |
| flip = !flip; |
| |
| ++s; |
| slen--; |
| } |
| } |
| else { |
| while ((c = *s) && slen) { |
| |
| if (colon && c == ':' && !flip) { |
| ++s; |
| slen--; |
| continue; |
| } |
| else if (apr_isdigit(c)) { |
| /* valid */ |
| } |
| else if (apr_isupper(c) && c <= 'F') { |
| /* valid */ |
| } |
| else if (apr_islower(c) && c <= 'f') { |
| /* valid */ |
| } |
| else { |
| return APR_BADCH; |
| } |
| |
| if (flip) { |
| size++; |
| } |
| flip = !flip; |
| |
| ++s; |
| slen--; |
| } |
| } |
| } |
| |
| if (len) { |
| *len = size; |
| } |
| if (!s) { |
| return APR_NOTFOUND; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| APR_DECLARE(const void *) apr_punescape_hex(apr_pool_t *p, const char *str, |
| int colon, apr_size_t *len) |
| { |
| apr_size_t size; |
| |
| switch (apr_unescape_hex(NULL, str, APR_ESCAPE_STRING, colon, &size)) { |
| case APR_SUCCESS: { |
| void *cmd = apr_palloc(p, size); |
| apr_unescape_hex(cmd, str, APR_ESCAPE_STRING, colon, len); |
| return cmd; |
| } |
| case APR_BADCH: |
| case APR_NOTFOUND: { |
| break; |
| } |
| } |
| |
| return NULL; |
| } |
