org.spongycastle.tls.crypto.impl

Class TlsNullCipher

java.lang.Object

org.spongycastle.tls.crypto.impl.TlsNullCipher

All Implemented Interfaces:

TlsCipher

public class TlsNullCipher
extends java.lang.Object
implements TlsCipher

The NULL cipher.

Field Summary

Fields

Modifier and Type	Field and Description
protected TlsCryptoParameters	cryptoParameters
protected org.spongycastle.tls.crypto.impl.TlsSuiteHMac	readMac
protected org.spongycastle.tls.crypto.impl.TlsSuiteHMac	writeMac

Constructor Summary

Constructors

Constructor and Description
TlsNullCipher(TlsCryptoParameters cryptoParameters, TlsHMAC clientMac, TlsHMAC serverMac)

Method Summary

Modifier and Type	Method and Description
byte[]	decodeCiphertext(long seqNo, short type, byte[] ciphertext, int offset, int len) Validate and decrypt the passed in cipher text using the current cipher suite.
byte[]	encodePlaintext(long seqNo, short type, byte[] plaintext, int offset, int len) Encrypt and MAC the passed in plain text using the current cipher suite.
int	getPlaintextLimit(int ciphertextLimit) Return the maximum size for the plaintext given ciphertextlimit bytes of ciphertext.

Methods inherited from class java.lang.Object

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

Field Detail

cryptoParameters

protected final TlsCryptoParameters cryptoParameters

readMac

protected final org.spongycastle.tls.crypto.impl.TlsSuiteHMac readMac

writeMac

protected final org.spongycastle.tls.crypto.impl.TlsSuiteHMac writeMac

Constructor Detail

TlsNullCipher

public TlsNullCipher(TlsCryptoParameters cryptoParameters,
                     TlsHMAC clientMac,
                     TlsHMAC serverMac)
              throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getPlaintextLimit

public int getPlaintextLimit(int ciphertextLimit)

Description copied from interface: TlsCipher

Return the maximum size for the plaintext given ciphertextlimit bytes of ciphertext.

Specified by:

getPlaintextLimit in interface TlsCipher

Parameters:

ciphertextLimit - the maximum number of bytes of ciphertext.

Returns:

the maximum size of the plaintext for ciphertextlimit bytes of input.

encodePlaintext

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

Description copied from interface: TlsCipher

Encrypt and MAC the passed in plain text using the current cipher suite.

Specified by:

encodePlaintext in interface TlsCipher

Parameters:

seqNo - sequence number of the message represented by plaintext.

type - content type of the message represented by plaintext.

plaintext - array holding input plain text to the cipher.

offset - offset into input array the plain text starts at.

len - length of the plaintext in the array.

Returns:

the resulting cipher text.

Throws:

java.io.IOException

decodeCiphertext

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

Description copied from interface: TlsCipher

Validate and decrypt the passed in cipher text using the current cipher suite.

Specified by:

decodeCiphertext in interface TlsCipher

Parameters:

seqNo - sequence number of the message represented by ciphertext.

type - content type of the message represented by ciphertext.

ciphertext - array holding input cipher text to the cipher.

offset - offset into input array the cipher text starts at.

len - length of the cipher text in the array.

Returns:

the resulting plaintext.

Throws:

java.io.IOException