org.spongycastle.crypto.tls

Class TlsStreamCipher

java.lang.Object

org.spongycastle.crypto.tls.TlsStreamCipher

All Implemented Interfaces:

TlsCipher

public class TlsStreamCipher
extends java.lang.Object
implements TlsCipher

Field Summary

Fields

Modifier and Type	Field and Description
protected TlsContext	context
protected StreamCipher	decryptCipher
protected StreamCipher	encryptCipher
protected TlsMac	readMac
protected boolean	usesNonce
protected TlsMac	writeMac

Constructor Summary

Constructors

Constructor and Description
TlsStreamCipher(TlsContext context, StreamCipher clientWriteCipher, StreamCipher serverWriteCipher, Digest clientWriteDigest, Digest serverWriteDigest, int cipherKeySize, boolean usesNonce)

Method Summary

Modifier and Type	Method and Description
protected void	checkMAC(long seqNo, short type, byte[] recBuf, int recStart, int recEnd, byte[] calcBuf, int calcOff, int calcLen)
byte[]	decodeCiphertext(long seqNo, short type, byte[] ciphertext, int offset, int len)
byte[]	encodePlaintext(long seqNo, short type, byte[] plaintext, int offset, int len)
int	getPlaintextLimit(int ciphertextLimit)
protected void	updateIV(StreamCipher cipher, boolean forEncryption, long seqNo)

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 StreamCipher encryptCipher

decryptCipher

protected StreamCipher decryptCipher

writeMac

protected TlsMac writeMac

readMac

protected TlsMac readMac

usesNonce

protected boolean usesNonce

Constructor Detail

TlsStreamCipher

public TlsStreamCipher(TlsContext context,
                       StreamCipher clientWriteCipher,
                       StreamCipher serverWriteCipher,
                       Digest clientWriteDigest,
                       Digest serverWriteDigest,
                       int cipherKeySize,
                       boolean usesNonce)
                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)

Specified by:

encodePlaintext in interface TlsCipher

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

checkMAC

protected void checkMAC(long seqNo,
                        short type,
                        byte[] recBuf,
                        int recStart,
                        int recEnd,
                        byte[] calcBuf,
                        int calcOff,
                        int calcLen)
                 throws java.io.IOException

Throws:

java.io.IOException

updateIV

protected void updateIV(StreamCipher cipher,
                        boolean forEncryption,
                        long seqNo)