org.spongycastle.crypto.tls

Class Chacha20Poly1305

java.lang.Object

org.spongycastle.crypto.tls.Chacha20Poly1305

All Implemented Interfaces:

TlsCipher

public class Chacha20Poly1305
extends java.lang.Object
implements TlsCipher

Field Summary

Fields

Modifier and Type	Field and Description
protected TlsContext	context
protected ChaChaEngine	decryptCipher
protected ChaChaEngine	encryptCipher

Constructor Summary

Constructors

Constructor and Description
Chacha20Poly1305(TlsContext context)

Method Summary

Methods

Modifier and Type	Method and Description
protected byte[]	calculateRecordMAC(KeyParameter macKey, byte[] additionalData, byte[] buf, int off, int len)
byte[]	decodeCiphertext(long seqNo, short type, byte[] ciphertext, int offset, int len)
byte[]	encodePlaintext(long seqNo, short type, byte[] plaintext, int offset, int len)
protected byte[]	getAdditionalData(long seqNo, short type, int len)
int	getPlaintextLimit(int ciphertextLimit)
protected KeyParameter	initRecordMAC(ChaChaEngine cipher, boolean forEncryption, long seqNo)
protected void	updateRecordMAC(Mac mac, byte[] buf, int off, int len)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

context

protected TlsContext context

encryptCipher

protected ChaChaEngine encryptCipher

decryptCipher

protected ChaChaEngine decryptCipher

Constructor Detail

Chacha20Poly1305

public Chacha20Poly1305(TlsContext context)
                 throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getPlaintextLimit

public int getPlaintextLimit(int ciphertextLimit)

Specified by:

getPlaintextLimit in interface TlsCipher

encodePlaintext

public byte[] encodePlaintext(long seqNo,
                     short type,
                     byte[] plaintext,
                     int offset,
                     int len)
                       throws java.io.IOException

Specified by:

encodePlaintext in interface TlsCipher

Throws:

java.io.IOException

decodeCiphertext

public byte[] decodeCiphertext(long seqNo,
                      short type,
                      byte[] ciphertext,
                      int offset,
                      int len)
                        throws java.io.IOException

Specified by:

decodeCiphertext in interface TlsCipher

Throws:

java.io.IOException

initRecordMAC

protected KeyParameter initRecordMAC(ChaChaEngine cipher,
                         boolean forEncryption,
                         long seqNo)

calculateRecordMAC

protected byte[] calculateRecordMAC(KeyParameter macKey,
                        byte[] additionalData,
                        byte[] buf,
                        int off,
                        int len)

updateRecordMAC

protected void updateRecordMAC(Mac mac,
                   byte[] buf,
                   int off,
                   int len)

getAdditionalData

protected byte[] getAdditionalData(long seqNo,
                       short type,
                       int len)
                            throws java.io.IOException

Throws:

java.io.IOException