Package org.bouncycastle.crypto.tls

Class TlsBlockCipher

  • All Implemented Interfaces:
    TlsCipher
    public class TlsBlockCipher
extends java.lang.Object
implements TlsCipher
    A generic TLS 1.0-1.2 / SSLv3 block cipher. This can be used for AES or 3DES for example.

    • Field Detail

      • randomData

        protected byte[] randomData

      • useExplicitIV

        protected boolean useExplicitIV

      • encryptThenMAC

        protected boolean encryptThenMAC

      • writeMac

        protected TlsMac writeMac

      • readMac

        protected TlsMac readMac

    • Constructor Detail

      • TlsBlockCipher

        public TlsBlockCipher​(TlsContext context,
                      BlockCipher clientWriteCipher,
                      BlockCipher serverWriteCipher,
                      Digest clientWriteDigest,
                      Digest serverWriteDigest,
                      int cipherKeySize)
               throws java.io.IOException
        Throws:
        java.io.IOException

    • Method Detail

      • getWriteMac

        public TlsMac getWriteMac()

      • getReadMac

        public TlsMac getReadMac()

      • 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

      • checkPaddingConstantTime

        protected int checkPaddingConstantTime​(byte[] buf,
                                       int off,
                                       int len,
                                       int blockSize,
                                       int macSize)

      • chooseExtraPadBlocks

        protected int chooseExtraPadBlocks​(java.security.SecureRandom r,
                                   int max)

      • lowestBitSet

        protected int lowestBitSet​(int x)