1 files changed, 0 insertions, 49 deletions
diff --git a/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderChainKey.java b/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderChainKey.java
deleted file mode 100644
index 71375923..00000000
--- a/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderChainKey.java
+++ /dev/null
@@ -1,49 +0,0 @@
-package org.whispersystems.libaxolotl.groups.ratchet;
-
-import java.security.InvalidKeyException;
-import java.security.NoSuchAlgorithmException;
-
-import javax.crypto.Mac;
-import javax.crypto.spec.SecretKeySpec;
-
-public class SenderChainKey {
-
-  private static final byte[] MESSAGE_KEY_SEED = {0x01};
-  private static final byte[] CHAIN_KEY_SEED   = {0x02};
-
-  private final int    iteration;
-  private final byte[] chainKey;
-
-  public SenderChainKey(int iteration, byte[] chainKey) {
-    this.iteration = iteration;
-    this.chainKey  = chainKey;
-  }
-
-  public int getIteration() {
-    return iteration;
-  }
-
-  public SenderMessageKey getSenderMessageKey() {
-    return new SenderMessageKey(iteration, getDerivative(MESSAGE_KEY_SEED, chainKey));
-  }
-
-  public SenderChainKey getNext() {
-    return new SenderChainKey(iteration + 1, getDerivative(CHAIN_KEY_SEED, chainKey));
-  }
-
-  public byte[] getSeed() {
-    return chainKey;
-  }
-
-  private byte[] getDerivative(byte[] seed, byte[] key) {
-    try {
-      Mac mac = Mac.getInstance("HmacSHA256");
-      mac.init(new SecretKeySpec(key, "HmacSHA256"));
-
-      return mac.doFinal(seed);
-    } catch (NoSuchAlgorithmException | InvalidKeyException e) {
-      throw new AssertionError(e);
-    }
-  }
-
-}