Java Code Examples for org.apache.tomcat.util.buf.ByteChunk#getBuffer()
The following examples show how to use
org.apache.tomcat.util.buf.ByteChunk#getBuffer() .
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Example 1
| Source File: Http11OutputBuffer.java From Tomcat8-Source-Read with MIT License | 6 votes |
|
/**
* This method will write the contents of the specified message bytes
* buffer to the output stream, without filtering. This method is meant to
* be used to write the response header.
*
* @param mb data to be written
*/
private void write(MessageBytes mb) {
if (mb.getType() != MessageBytes.T_BYTES) {
mb.toBytes();
ByteChunk bc = mb.getByteChunk();
// Need to filter out CTLs excluding TAB. ISO-8859-1 and UTF-8
// values will be OK. Strings using other encodings may be
// corrupted.
byte[] buffer = bc.getBuffer();
for (int i = bc.getOffset(); i < bc.getLength(); i++) {
// byte values are signed i.e. -128 to 127
// The values are used unsigned. 0 to 31 are CTLs so they are
// filtered (apart from TAB which is 9). 127 is a control (DEL).
// The values 128 to 255 are all OK. Converting those to signed
// gives -128 to -1.
if ((buffer[i] > -1 && buffer[i] <= 31 && buffer[i] != 9) ||
buffer[i] == 127) {
buffer[i] = ' ';
}
}
}
write(mb.getByteChunk());
}
Example 2
| Source File: Cookies.java From tomcatsrc with Apache License 2.0 | 6 votes |
|
/**
* Unescapes any double quotes in the given cookie value.
*
* @param bc The cookie value to modify
*/
private static void unescapeDoubleQuotes(ByteChunk bc) {
if (bc == null || bc.getLength() == 0 || bc.indexOf('"', 0) == -1) {
return;
}
int src = bc.getStart();
int end = bc.getEnd();
int dest = src;
byte[] buffer = bc.getBuffer();
while (src < end) {
if (buffer[src] == '\\' && src < end && buffer[src+1] == '"') {
src++;
}
buffer[dest] = buffer[src];
dest ++;
src ++;
}
bc.setEnd(dest);
}
Example 3
| Source File: CoyoteAdapter.java From tomcatsrc with Apache License 2.0 | 6 votes |
|
/**
* Character conversion of the a US-ASCII MessageBytes.
*/
protected void convertMB(MessageBytes mb) {
// This is of course only meaningful for bytes
if (mb.getType() != MessageBytes.T_BYTES) {
return;
}
ByteChunk bc = mb.getByteChunk();
CharChunk cc = mb.getCharChunk();
int length = bc.getLength();
cc.allocate(length, -1);
// Default encoding: fast conversion
byte[] bbuf = bc.getBuffer();
char[] cbuf = cc.getBuffer();
int start = bc.getStart();
for (int i = 0; i < length; i++) {
cbuf[i] = (char) (bbuf[i + start] & 0xff);
}
mb.setChars(cbuf, 0, length);
}
Example 4
| Source File: CoyoteAdapter.java From Tomcat7.0.67 with Apache License 2.0 | 6 votes |
|
/**
* Character conversion of the a US-ASCII MessageBytes.
*/
protected void convertMB(MessageBytes mb) {
// This is of course only meaningful for bytes
if (mb.getType() != MessageBytes.T_BYTES) {
return;
}
ByteChunk bc = mb.getByteChunk();
CharChunk cc = mb.getCharChunk();
int length = bc.getLength();
cc.allocate(length, -1);
// Default encoding: fast conversion
byte[] bbuf = bc.getBuffer();
char[] cbuf = cc.getBuffer();
int start = bc.getStart();
for (int i = 0; i < length; i++) {
cbuf[i] = (char) (bbuf[i + start] & 0xff);
}
mb.setChars(cbuf, 0, length);
}
Example 5
| Source File: Cookies.java From Tomcat7.0.67 with Apache License 2.0 | 6 votes |
|
/**
* Unescapes any double quotes in the given cookie value.
*
* @param bc The cookie value to modify
*/
private static void unescapeDoubleQuotes(ByteChunk bc) {
if (bc == null || bc.getLength() == 0 || bc.indexOf('"', 0) == -1) {
return;
}
int src = bc.getStart();
int end = bc.getEnd();
int dest = src;
byte[] buffer = bc.getBuffer();
while (src < end) {
if (buffer[src] == '\\' && src < end && buffer[src+1] == '"') {
src++;
}
buffer[dest] = buffer[src];
dest ++;
src ++;
}
bc.setEnd(dest);
}
Example 6
| Source File: InternalAprOutputBuffer.java From Tomcat7.0.67 with Apache License 2.0 | 6 votes |
|
/**
* Write chunk.
*/
@Override
public int doWrite(ByteChunk chunk, Response res)
throws IOException {
int len = chunk.getLength();
int start = chunk.getStart();
byte[] b = chunk.getBuffer();
while (len > 0) {
int thisTime = len;
if (bbuf.position() == bbuf.capacity()) {
flushBuffer();
}
if (thisTime > bbuf.capacity() - bbuf.position()) {
thisTime = bbuf.capacity() - bbuf.position();
}
bbuf.put(b, start, thisTime);
len = len - thisTime;
start = start + thisTime;
}
byteCount += chunk.getLength();
return chunk.getLength();
}
Example 7
| Source File: CoyoteAdapter.java From Tomcat8-Source-Read with MIT License | 6 votes |
|
/**
* Character conversion of the a US-ASCII MessageBytes.
*
* @param mb The MessageBytes instance containing the bytes that should be converted to chars
*/
protected void convertMB(MessageBytes mb) {
// This is of course only meaningful for bytes
if (mb.getType() != MessageBytes.T_BYTES) {
return;
}
ByteChunk bc = mb.getByteChunk();
CharChunk cc = mb.getCharChunk();
int length = bc.getLength();
cc.allocate(length, -1);
// Default encoding: fast conversion
byte[] bbuf = bc.getBuffer();
char[] cbuf = cc.getBuffer();
int start = bc.getStart();
for (int i = 0; i < length; i++) {
cbuf[i] = (char) (bbuf[i + start] & 0xff);
}
mb.setChars(cbuf, 0, length);
}
Example 8
| Source File: InternalNioOutputBuffer.java From Tomcat7.0.67 with Apache License 2.0 | 5 votes |
|
/**
* Write chunk.
*/
@Override
public int doWrite(ByteChunk chunk, Response res)
throws IOException {
int len = chunk.getLength();
int start = chunk.getStart();
byte[] b = chunk.getBuffer();
addToBB(b, start, len);
byteCount += chunk.getLength();
return chunk.getLength();
}
Example 9
| Source File: InternalAprOutputBuffer.java From tomcatsrc with Apache License 2.0 | 5 votes |
|
/**
* Write chunk.
*/
@Override
public int doWrite(ByteChunk chunk, Response res) throws IOException {
try {
int len = chunk.getLength();
int start = chunk.getStart();
byte[] b = chunk.getBuffer();
while (len > 0) {
int thisTime = len;
if (bbuf.position() == bbuf.capacity()) {
flushBuffer();
}
if (thisTime > bbuf.capacity() - bbuf.position()) {
thisTime = bbuf.capacity() - bbuf.position();
}
bbuf.put(b, start, thisTime);
len = len - thisTime;
start = start + thisTime;
}
byteCount += chunk.getLength();
return chunk.getLength();
} catch (IOException ioe) {
response.action(ActionCode.CLOSE_NOW, ioe);
// Re-throw
throw ioe;
}
}
Example 10
| Source File: AbstractHttp11Processor.java From tomcatsrc with Apache License 2.0 | 5 votes |
|
/**
* Specialized utility method: find a sequence of lower case bytes inside
* a ByteChunk.
*/
protected int findBytes(ByteChunk bc, byte[] b) {
byte first = b[0];
byte[] buff = bc.getBuffer();
int start = bc.getStart();
int end = bc.getEnd();
// Look for first char
int srcEnd = b.length;
for (int i = start; i <= (end - srcEnd); i++) {
if (Ascii.toLower(buff[i]) != first) {
continue;
}
// found first char, now look for a match
int myPos = i+1;
for (int srcPos = 1; srcPos < srcEnd;) {
if (Ascii.toLower(buff[myPos++]) != b[srcPos++]) {
break;
}
if (srcPos == srcEnd) {
return i - start; // found it
}
}
}
return -1;
}
Example 11
| Source File: AbstractHttp11Processor.java From Tomcat7.0.67 with Apache License 2.0 | 5 votes |
|
/**
* Specialized utility method: find a sequence of lower case bytes inside
* a ByteChunk.
*/
protected int findBytes(ByteChunk bc, byte[] b) {
byte first = b[0];
byte[] buff = bc.getBuffer();
int start = bc.getStart();
int end = bc.getEnd();
// Look for first char
int srcEnd = b.length;
for (int i = start; i <= (end - srcEnd); i++) {
if (Ascii.toLower(buff[i]) != first) {
continue;
}
// found first char, now look for a match
int myPos = i+1;
for (int srcPos = 1; srcPos < srcEnd;) {
if (Ascii.toLower(buff[myPos++]) != b[srcPos++]) {
break;
}
if (srcPos == srcEnd) {
return i - start; // found it
}
}
}
return -1;
}
Example 12
| Source File: LegacyCookieProcessor.java From Tomcat8-Source-Read with MIT License | 5 votes |
|
/**
* Unescapes any double quotes in the given cookie value.
*
* @param bc The cookie value to modify
*/
private static final void unescapeDoubleQuotes(ByteChunk bc) {
if (bc == null || bc.getLength() == 0 || bc.indexOf('"', 0) == -1) {
return;
}
// Take a copy of the buffer so the original cookie header is not
// modified by this unescaping.
byte[] original = bc.getBuffer();
int len = bc.getLength();
byte[] copy = new byte[len];
System.arraycopy(original, bc.getStart(), copy, 0, len);
int src = 0;
int dest = 0;
while (src < len) {
if (copy[src] == '\\' && src < len && copy[src+1] == '"') {
src++;
}
copy[dest] = copy[src];
dest ++;
src ++;
}
bc.setBytes(copy, 0, dest);
}
Example 13
| Source File: Http11OutputBuffer.java From Tomcat8-Source-Read with MIT License | 5 votes |
|
/**
* Write chunk.
*
* @deprecated Unused. Will be removed in Tomcat 9. Use
* {@link #doWrite(ByteBuffer)}
*/
@Deprecated
@Override
public int doWrite(ByteChunk chunk) throws IOException {
int len = chunk.getLength();
int start = chunk.getStart();
byte[] b = chunk.getBuffer();
socketWrapper.write(isBlocking(), b, start, len);
byteCount += len;
return len;
}
Example 14
| Source File: AjpMessage.java From Tomcat8-Source-Read with MIT License | 5 votes |
|
/**
* Write a MessageBytes out at the current write position. A null
* MessageBytes is encoded as a string with length 0.
*
* @param mb The data to write
*/
public void appendBytes(MessageBytes mb) {
if (mb == null) {
log.error(sm.getString("ajpmessage.null"),
new NullPointerException());
appendInt(0);
appendByte(0);
return;
}
if (mb.getType() != MessageBytes.T_BYTES) {
mb.toBytes();
ByteChunk bc = mb.getByteChunk();
// Need to filter out CTLs excluding TAB. ISO-8859-1 and UTF-8
// values will be OK. Strings using other encodings may be
// corrupted.
byte[] buffer = bc.getBuffer();
for (int i = bc.getOffset(); i < bc.getLength(); i++) {
// byte values are signed i.e. -128 to 127
// The values are used unsigned. 0 to 31 are CTLs so they are
// filtered (apart from TAB which is 9). 127 is a control (DEL).
// The values 128 to 255 are all OK. Converting those to signed
// gives -128 to -1.
if ((buffer[i] > -1 && buffer[i] <= 31 && buffer[i] != 9) ||
buffer[i] == 127) {
buffer[i] = ' ';
}
}
}
appendByteChunk(mb.getByteChunk());
}
Example 15
| Source File: Base64.java From Tomcat7.0.67 with Apache License 2.0 | 4 votes |
|
/**
* Decodes Base64 data into octets
*
* @param base64DataBC Byte array containing Base64 data
* @param decodedDataBC The decoded data bytes
*/
public static void decode( ByteChunk base64DataBC, ByteChunk decodedDataBC)
{
int start = base64DataBC.getStart();
int end = base64DataBC.getEnd();
byte[] base64Data = base64DataBC.getBuffer();
decodedDataBC.recycle();
// handle the edge case, so we don't have to worry about it later
if(end - start == 0) { return; }
int numberQuadruple = (end - start)/FOURBYTE;
byte b1=0,b2=0,b3=0, b4=0, marker0=0, marker1=0;
// Throw away anything not in base64Data
int encodedIndex = 0;
int dataIndex = start;
byte[] decodedData = null;
{
// this sizes the output array properly - rlw
int lastData = end - start;
// ignore the '=' padding
while (base64Data[start+lastData-1] == PAD)
{
if (--lastData == 0)
{
return;
}
}
decodedDataBC.allocate(lastData - numberQuadruple, -1);
decodedDataBC.setEnd(lastData - numberQuadruple);
decodedData = decodedDataBC.getBuffer();
}
for (int i = 0; i < numberQuadruple; i++)
{
dataIndex = start + i * 4;
marker0 = base64Data[dataIndex + 2];
marker1 = base64Data[dataIndex + 3];
b1 = base64Alphabet[base64Data[dataIndex]];
b2 = base64Alphabet[base64Data[dataIndex +1]];
if (marker0 != PAD && marker1 != PAD)
{
//No PAD e.g 3cQl
b3 = base64Alphabet[ marker0 ];
b4 = base64Alphabet[ marker1 ];
decodedData[encodedIndex] = (byte) (( b1 <<2 | b2>>4 ) & 0xff);
decodedData[encodedIndex + 1] =
(byte) ((((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ) & 0xff);
decodedData[encodedIndex + 2] = (byte) (( b3<<6 | b4 ) & 0xff);
}
else if (marker0 == PAD)
{
//Two PAD e.g. 3c[Pad][Pad]
decodedData[encodedIndex] = (byte) (( b1 <<2 | b2>>4 ) & 0xff);
}
else if (marker1 == PAD)
{
//One PAD e.g. 3cQ[Pad]
b3 = base64Alphabet[ marker0 ];
decodedData[encodedIndex] = (byte) (( b1 <<2 | b2>>4 ) & 0xff);
decodedData[encodedIndex + 1] =
(byte) ((((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ) & 0xff);
}
encodedIndex += 3;
}
}
Example 16
| Source File: Base64.java From Tomcat7.0.67 with Apache License 2.0 | 4 votes |
|
/**
* Decodes Base64 data into octets
*
* @param base64DataBC Byte array containing Base64 data
* @param decodedDataCC The decoded data chars
*/
public static void decode( ByteChunk base64DataBC, CharChunk decodedDataCC)
{
int start = base64DataBC.getStart();
int end = base64DataBC.getEnd();
byte[] base64Data = base64DataBC.getBuffer();
decodedDataCC.recycle();
// handle the edge case, so we don't have to worry about it later
if(end - start == 0) { return; }
int numberQuadruple = (end - start)/FOURBYTE;
byte b1=0,b2=0,b3=0, b4=0, marker0=0, marker1=0;
// Throw away anything not in base64Data
int encodedIndex = 0;
int dataIndex = start;
char[] decodedData = null;
{
// this sizes the output array properly - rlw
int lastData = end - start;
// ignore the '=' padding
while (base64Data[start+lastData-1] == PAD)
{
if (--lastData == 0)
{
return;
}
}
decodedDataCC.allocate(lastData - numberQuadruple, -1);
decodedDataCC.setEnd(lastData - numberQuadruple);
decodedData = decodedDataCC.getBuffer();
}
for (int i = 0; i < numberQuadruple; i++)
{
dataIndex = start + i * 4;
marker0 = base64Data[dataIndex + 2];
marker1 = base64Data[dataIndex + 3];
b1 = base64Alphabet[base64Data[dataIndex]];
b2 = base64Alphabet[base64Data[dataIndex +1]];
if (marker0 != PAD && marker1 != PAD)
{
//No PAD e.g 3cQl
b3 = base64Alphabet[ marker0 ];
b4 = base64Alphabet[ marker1 ];
decodedData[encodedIndex] = (char) (( b1 <<2 | b2>>4 ) & 0xff);
decodedData[encodedIndex + 1] =
(char) ((((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ) & 0xff);
decodedData[encodedIndex + 2] = (char) (( b3<<6 | b4 ) & 0xff);
}
else if (marker0 == PAD)
{
//Two PAD e.g. 3c[Pad][Pad]
decodedData[encodedIndex] = (char) (( b1 <<2 | b2>>4 ) & 0xff);
}
else if (marker1 == PAD)
{
//One PAD e.g. 3cQ[Pad]
b3 = base64Alphabet[ marker0 ];
decodedData[encodedIndex] = (char) (( b1 <<2 | b2>>4 ) & 0xff);
decodedData[encodedIndex + 1] =
(char) ((((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ) & 0xff);
}
encodedIndex += 3;
}
}
Example 17
| Source File: CoyoteAdapter.java From tomcatsrc with Apache License 2.0 | 4 votes |
|
/**
* Extract the path parameters from the request. This assumes parameters are
* of the form /path;name=value;name2=value2/ etc. Currently only really
* interested in the session ID that will be in this form. Other parameters
* can safely be ignored.
*
* @param req
* @param request
*/
protected void parsePathParameters(org.apache.coyote.Request req,
Request request) {
// Process in bytes (this is default format so this is normally a NO-OP
req.decodedURI().toBytes();
ByteChunk uriBC = req.decodedURI().getByteChunk();
int semicolon = uriBC.indexOf(';', 0);
// What encoding to use? Some platforms, eg z/os, use a default
// encoding that doesn't give the expected result so be explicit
String enc = connector.getURIEncoding();
if (enc == null) {
enc = "ISO-8859-1";
}
Charset charset = null;
try {
charset = B2CConverter.getCharset(enc);
} catch (UnsupportedEncodingException e1) {
log.warn(sm.getString("coyoteAdapter.parsePathParam",
enc));
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("coyoteAdapter.debug", "uriBC",
uriBC.toString()));
log.debug(sm.getString("coyoteAdapter.debug", "semicolon",
String.valueOf(semicolon)));
log.debug(sm.getString("coyoteAdapter.debug", "enc", enc));
}
while (semicolon > -1) {
// Parse path param, and extract it from the decoded request URI
int start = uriBC.getStart();
int end = uriBC.getEnd();
int pathParamStart = semicolon + 1;
int pathParamEnd = ByteChunk.findBytes(uriBC.getBuffer(),
start + pathParamStart, end,
new byte[] {';', '/'});
String pv = null;
if (pathParamEnd >= 0) {
if (charset != null) {
pv = new String(uriBC.getBuffer(), start + pathParamStart,
pathParamEnd - pathParamStart, charset);
}
// Extract path param from decoded request URI
byte[] buf = uriBC.getBuffer();
for (int i = 0; i < end - start - pathParamEnd; i++) {
buf[start + semicolon + i]
= buf[start + i + pathParamEnd];
}
uriBC.setBytes(buf, start,
end - start - pathParamEnd + semicolon);
} else {
if (charset != null) {
pv = new String(uriBC.getBuffer(), start + pathParamStart,
(end - start) - pathParamStart, charset);
}
uriBC.setEnd(start + semicolon);
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("coyoteAdapter.debug", "pathParamStart",
String.valueOf(pathParamStart)));
log.debug(sm.getString("coyoteAdapter.debug", "pathParamEnd",
String.valueOf(pathParamEnd)));
log.debug(sm.getString("coyoteAdapter.debug", "pv", pv));
}
if (pv != null) {
int equals = pv.indexOf('=');
if (equals > -1) {
String name = pv.substring(0, equals);
String value = pv.substring(equals + 1);
request.addPathParameter(name, value);
if (log.isDebugEnabled()) {
log.debug(sm.getString("coyoteAdapter.debug", "equals",
String.valueOf(equals)));
log.debug(sm.getString("coyoteAdapter.debug", "name",
name));
log.debug(sm.getString("coyoteAdapter.debug", "value",
value));
}
}
}
semicolon = uriBC.indexOf(';', semicolon);
}
}
Example 18
| Source File: CoyoteAdapter.java From Tomcat7.0.67 with Apache License 2.0 | 4 votes |
|
/**
* Extract the path parameters from the request. This assumes parameters are
* of the form /path;name=value;name2=value2/ etc. Currently only really
* interested in the session ID that will be in this form. Other parameters
* can safely be ignored.
*
* @param req
* @param request
*/
protected void parsePathParameters(org.apache.coyote.Request req,
Request request) {
// Process in bytes (this is default format so this is normally a NO-OP
req.decodedURI().toBytes();
ByteChunk uriBC = req.decodedURI().getByteChunk();
int semicolon = uriBC.indexOf(';', 0);
// What encoding to use? Some platforms, eg z/os, use a default
// encoding that doesn't give the expected result so be explicit
String enc = connector.getURIEncoding();
if (enc == null) {
enc = "ISO-8859-1";
}
Charset charset = null;
try {
charset = B2CConverter.getCharset(enc);
} catch (UnsupportedEncodingException e1) {
log.warn(sm.getString("coyoteAdapter.parsePathParam",
enc));
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("coyoteAdapter.debug", "uriBC",
uriBC.toString()));
log.debug(sm.getString("coyoteAdapter.debug", "semicolon",
String.valueOf(semicolon)));
log.debug(sm.getString("coyoteAdapter.debug", "enc", enc));
}
while (semicolon > -1) {
// Parse path param, and extract it from the decoded request URI
int start = uriBC.getStart();
int end = uriBC.getEnd();
int pathParamStart = semicolon + 1;
int pathParamEnd = ByteChunk.findBytes(uriBC.getBuffer(),
start + pathParamStart, end,
new byte[] {';', '/'});
String pv = null;
if (pathParamEnd >= 0) {
if (charset != null) {
pv = new String(uriBC.getBuffer(), start + pathParamStart,
pathParamEnd - pathParamStart, charset);
}
// Extract path param from decoded request URI
byte[] buf = uriBC.getBuffer();
for (int i = 0; i < end - start - pathParamEnd; i++) {
buf[start + semicolon + i]
= buf[start + i + pathParamEnd];
}
uriBC.setBytes(buf, start,
end - start - pathParamEnd + semicolon);
} else {
if (charset != null) {
pv = new String(uriBC.getBuffer(), start + pathParamStart,
(end - start) - pathParamStart, charset);
}
uriBC.setEnd(start + semicolon);
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("coyoteAdapter.debug", "pathParamStart",
String.valueOf(pathParamStart)));
log.debug(sm.getString("coyoteAdapter.debug", "pathParamEnd",
String.valueOf(pathParamEnd)));
log.debug(sm.getString("coyoteAdapter.debug", "pv", pv));
}
if (pv != null) {
int equals = pv.indexOf('=');
if (equals > -1) {
String name = pv.substring(0, equals);
String value = pv.substring(equals + 1);
request.addPathParameter(name, value);
if (log.isDebugEnabled()) {
log.debug(sm.getString("coyoteAdapter.debug", "equals",
String.valueOf(equals)));
log.debug(sm.getString("coyoteAdapter.debug", "name",
name));
log.debug(sm.getString("coyoteAdapter.debug", "value",
value));
}
}
}
semicolon = uriBC.indexOf(';', semicolon);
}
}
Example 19
| Source File: Base64.java From tomcatsrc with Apache License 2.0 | 4 votes |
|
/**
* Decodes Base64 data into octets
*
* @param base64DataBC Byte array containing Base64 data
* @param decodedDataCC The decoded data chars
*/
public static void decode( ByteChunk base64DataBC, CharChunk decodedDataCC)
{
int start = base64DataBC.getStart();
int end = base64DataBC.getEnd();
byte[] base64Data = base64DataBC.getBuffer();
decodedDataCC.recycle();
// handle the edge case, so we don't have to worry about it later
if(end - start == 0) { return; }
int numberQuadruple = (end - start)/FOURBYTE;
byte b1=0,b2=0,b3=0, b4=0, marker0=0, marker1=0;
// Throw away anything not in base64Data
int encodedIndex = 0;
int dataIndex = start;
char[] decodedData = null;
{
// this sizes the output array properly - rlw
int lastData = end - start;
// ignore the '=' padding
while (base64Data[start+lastData-1] == PAD)
{
if (--lastData == 0)
{
return;
}
}
decodedDataCC.allocate(lastData - numberQuadruple, -1);
decodedDataCC.setEnd(lastData - numberQuadruple);
decodedData = decodedDataCC.getBuffer();
}
for (int i = 0; i < numberQuadruple; i++)
{
dataIndex = start + i * 4;
marker0 = base64Data[dataIndex + 2];
marker1 = base64Data[dataIndex + 3];
b1 = base64Alphabet[base64Data[dataIndex]];
b2 = base64Alphabet[base64Data[dataIndex +1]];
if (marker0 != PAD && marker1 != PAD)
{
//No PAD e.g 3cQl
b3 = base64Alphabet[ marker0 ];
b4 = base64Alphabet[ marker1 ];
decodedData[encodedIndex] = (char) (( b1 <<2 | b2>>4 ) & 0xff);
decodedData[encodedIndex + 1] =
(char) ((((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ) & 0xff);
decodedData[encodedIndex + 2] = (char) (( b3<<6 | b4 ) & 0xff);
}
else if (marker0 == PAD)
{
//Two PAD e.g. 3c[Pad][Pad]
decodedData[encodedIndex] = (char) (( b1 <<2 | b2>>4 ) & 0xff);
}
else if (marker1 == PAD)
{
//One PAD e.g. 3cQ[Pad]
b3 = base64Alphabet[ marker0 ];
decodedData[encodedIndex] = (char) (( b1 <<2 | b2>>4 ) & 0xff);
decodedData[encodedIndex + 1] =
(char) ((((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ) & 0xff);
}
encodedIndex += 3;
}
}
Example 20
| Source File: Base64.java From tomcatsrc with Apache License 2.0 | 4 votes |
|
/**
* Decodes Base64 data into octets
*
* @param base64DataBC Byte array containing Base64 data
* @param decodedDataBC The decoded data bytes
*/
public static void decode( ByteChunk base64DataBC, ByteChunk decodedDataBC)
{
int start = base64DataBC.getStart();
int end = base64DataBC.getEnd();
byte[] base64Data = base64DataBC.getBuffer();
decodedDataBC.recycle();
// handle the edge case, so we don't have to worry about it later
if(end - start == 0) { return; }
int numberQuadruple = (end - start)/FOURBYTE;
byte b1=0,b2=0,b3=0, b4=0, marker0=0, marker1=0;
// Throw away anything not in base64Data
int encodedIndex = 0;
int dataIndex = start;
byte[] decodedData = null;
{
// this sizes the output array properly - rlw
int lastData = end - start;
// ignore the '=' padding
while (base64Data[start+lastData-1] == PAD)
{
if (--lastData == 0)
{
return;
}
}
decodedDataBC.allocate(lastData - numberQuadruple, -1);
decodedDataBC.setEnd(lastData - numberQuadruple);
decodedData = decodedDataBC.getBuffer();
}
for (int i = 0; i < numberQuadruple; i++)
{
dataIndex = start + i * 4;
marker0 = base64Data[dataIndex + 2];
marker1 = base64Data[dataIndex + 3];
b1 = base64Alphabet[base64Data[dataIndex]];
b2 = base64Alphabet[base64Data[dataIndex +1]];
if (marker0 != PAD && marker1 != PAD)
{
//No PAD e.g 3cQl
b3 = base64Alphabet[ marker0 ];
b4 = base64Alphabet[ marker1 ];
decodedData[encodedIndex] = (byte) (( b1 <<2 | b2>>4 ) & 0xff);
decodedData[encodedIndex + 1] =
(byte) ((((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ) & 0xff);
decodedData[encodedIndex + 2] = (byte) (( b3<<6 | b4 ) & 0xff);
}
else if (marker0 == PAD)
{
//Two PAD e.g. 3c[Pad][Pad]
decodedData[encodedIndex] = (byte) (( b1 <<2 | b2>>4 ) & 0xff);
}
else if (marker1 == PAD)
{
//One PAD e.g. 3cQ[Pad]
b3 = base64Alphabet[ marker0 ];
decodedData[encodedIndex] = (byte) (( b1 <<2 | b2>>4 ) & 0xff);
decodedData[encodedIndex + 1] =
(byte) ((((b2 & 0xf)<<4 ) |( (b3>>2) & 0xf) ) & 0xff);
}
encodedIndex += 3;
}
}
