org.spongycastle.tls.crypto

Interface TlsCipher

All Known Implementing Classes:

TlsAEADCipher, TlsBlockCipher, TlsNullCipher, TlsNullNullCipher

public interface TlsCipher

Base interface for a TLS cipher suite.

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.

Method Detail

getPlaintextLimit

int getPlaintextLimit(int ciphertextLimit)

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

Parameters:

ciphertextLimit - the maximum number of bytes of ciphertext.

Returns:

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

encodePlaintext

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

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

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

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

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

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