d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
81668aa338
freebsd-skq/contrib/apr/encoding/apr_escape.c
peter 72d63a715a MFC r266728,266731,266735,266736,268135,268960,269833 
Update apr 1.4.8 -> 1.5.1
 Update apr-util 1.5.2 -> 1.5.3
 Update serf 1.3.4 -> 1.3.7
 Update svnlite 1.8.8 -> 1.8.10
 Deal with svnlite.1 manpage.
2014-08-12 01:40:11 +00:00

1182 lines
34 KiB
C
Raw Blame History

/* 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);
}
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, "&gt;", 4);
size += 4;
d += 4;
break;
}
case '<': {
memcpy(d, "&lt;", 4);
size += 4;
d += 4;
break;
}
case '&': {
memcpy(d, "&amp;", 5);
size += 5;
d += 5;
break;
}
case '\"': {
memcpy(d, "&quot;", 6);
size += 6;
d += 6;
break;
}
case '\'': {
memcpy(d, "&apos;", 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;
}
Reference in New Issue View Git Blame Copy Permalink