1 files changed, 0 insertions, 123 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/tls/TlsNullCipher.java b/core/src/main/java/org/bouncycastle/crypto/tls/TlsNullCipher.java
deleted file mode 100644
index d1f6986b..00000000
--- a/core/src/main/java/org/bouncycastle/crypto/tls/TlsNullCipher.java
+++ /dev/null
@@ -1,123 +0,0 @@
-package org.bouncycastle.crypto.tls;
-
-import java.io.IOException;
-
-import org.bouncycastle.crypto.Digest;
-import org.bouncycastle.util.Arrays;
-
-/**
- * A NULL CipherSuite with optional MAC
- */
-public class TlsNullCipher
-    implements TlsCipher
-{
-    protected TlsContext context;
-
-    protected TlsMac writeMac;
-    protected TlsMac readMac;
-
-    public TlsNullCipher(TlsContext context)
-    {
-        this.context = context;
-        this.writeMac = null;
-        this.readMac = null;
-    }
-
-    public TlsNullCipher(TlsContext context, Digest clientWriteDigest, Digest serverWriteDigest)
-        throws IOException
-    {
-        if ((clientWriteDigest == null) != (serverWriteDigest == null))
-        {
-            throw new TlsFatalAlert(AlertDescription.internal_error);
-        }
-
-        this.context = context;
-
-        TlsMac clientWriteMac = null, serverWriteMac = null;
-
-        if (clientWriteDigest != null)
-        {
-            int key_block_size = clientWriteDigest.getDigestSize()
-                + serverWriteDigest.getDigestSize();
-            byte[] key_block = TlsUtils.calculateKeyBlock(context, key_block_size);
-
-            int offset = 0;
-
-            clientWriteMac = new TlsMac(context, clientWriteDigest, key_block, offset,
-                clientWriteDigest.getDigestSize());
-            offset += clientWriteDigest.getDigestSize();
-
-            serverWriteMac = new TlsMac(context, serverWriteDigest, key_block, offset,
-                serverWriteDigest.getDigestSize());
-            offset += serverWriteDigest.getDigestSize();
-
-            if (offset != key_block_size)
-            {
-                throw new TlsFatalAlert(AlertDescription.internal_error);
-            }
-        }
-
-        if (context.isServer())
-        {
-            writeMac = serverWriteMac;
-            readMac = clientWriteMac;
-        }
-        else
-        {
-            writeMac = clientWriteMac;
-            readMac = serverWriteMac;
-        }
-    }
-
-    public int getPlaintextLimit(int ciphertextLimit)
-    {
-        int result = ciphertextLimit;
-        if (writeMac != null)
-        {
-            result -= writeMac.getSize();
-        }
-        return result;
-    }
-
-    public byte[] encodePlaintext(long seqNo, short type, byte[] plaintext, int offset, int len)
-        throws IOException
-    {
-        if (writeMac == null)
-        {
-            return Arrays.copyOfRange(plaintext, offset, offset + len);
-        }
-
-        byte[] mac = writeMac.calculateMac(seqNo, type, plaintext, offset, len);
-        byte[] ciphertext = new byte[len + mac.length];
-        System.arraycopy(plaintext, offset, ciphertext, 0, len);
-        System.arraycopy(mac, 0, ciphertext, len, mac.length);
-        return ciphertext;
-    }
-
-    public byte[] decodeCiphertext(long seqNo, short type, byte[] ciphertext, int offset, int len)
-        throws IOException
-    {
-        if (readMac == null)
-        {
-            return Arrays.copyOfRange(ciphertext, offset, offset + len);
-        }
-
-        int macSize = readMac.getSize();
-        if (len < macSize)
-        {
-            throw new TlsFatalAlert(AlertDescription.decode_error);
-        }
-
-        int macInputLen = len - macSize;
-
-        byte[] receivedMac = Arrays.copyOfRange(ciphertext, offset + macInputLen, offset + len);
-        byte[] computedMac = readMac.calculateMac(seqNo, type, ciphertext, offset, macInputLen);
-
-        if (!Arrays.constantTimeAreEqual(receivedMac, computedMac))
-        {
-            throw new TlsFatalAlert(AlertDescription.bad_record_mac);
-        }
-
-        return Arrays.copyOfRange(ciphertext, offset, offset + macInputLen);
-    }
-}