1 files changed, 26 insertions, 0 deletions
diff --git a/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedRootSecrets.java b/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedRootSecrets.java
new file mode 100644
index 00000000..82cc541d
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedRootSecrets.java
@@ -0,0 +1,26 @@
+package org.whispersystems.libaxolotl.kdf;
+
+import org.whispersystems.libaxolotl.util.ByteUtil;
+
+public class DerivedRootSecrets {
+
+  public static final int SIZE = 64;
+
+  private final byte[] rootKey;
+  private final byte[] chainKey;
+
+  public DerivedRootSecrets(byte[] okm) {
+    byte[][] keys = ByteUtil.split(okm, 32, 32);
+    this.rootKey  = keys[0];
+    this.chainKey = keys[1];
+  }
+
+  public byte[] getRootKey() {
+    return rootKey;
+  }
+
+  public byte[] getChainKey() {
+    return chainKey;
+  }
+
+}