1 files changed, 46 insertions, 1 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA224Digest.java b/bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA224Digest.java
index d430321..4f2b284 100644
--- a/bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA224Digest.java
+++ b/bcprov/src/main/java/org/bouncycastle/crypto/digests/SHA224Digest.java
@@ -1,8 +1,8 @@
 package org.bouncycastle.crypto.digests;
 
 
-import org.bouncycastle.crypto.util.Pack;
 import org.bouncycastle.util.Memoable;
+import org.bouncycastle.util.Pack;
 
 
 /**
@@ -18,6 +18,7 @@ import org.bouncycastle.util.Memoable;
  */
 public class SHA224Digest
     extends GeneralDigest
+    implements EncodableDigest
 {
     private static final int    DIGEST_LENGTH = 28;
 
@@ -62,6 +63,26 @@ public class SHA224Digest
         xOff = t.xOff;
     }
 
+    public SHA224Digest(byte[] encodedState)
+    {
+        super(encodedState);
+
+        H1 = Pack.bigEndianToInt(encodedState, 16);
+        H2 = Pack.bigEndianToInt(encodedState, 20);
+        H3 = Pack.bigEndianToInt(encodedState, 24);
+        H4 = Pack.bigEndianToInt(encodedState, 28);
+        H5 = Pack.bigEndianToInt(encodedState, 32);
+        H6 = Pack.bigEndianToInt(encodedState, 36);
+        H7 = Pack.bigEndianToInt(encodedState, 40);
+        H8 = Pack.bigEndianToInt(encodedState, 44);
+
+        xOff = Pack.bigEndianToInt(encodedState, 48);
+        for (int i = 0; i != xOff; i++)
+        {
+            X[i] = Pack.bigEndianToInt(encodedState, 52 + (i * 4));
+        }
+    }
+
     public String getAlgorithmName()
     {
         return "SHA-224";
@@ -307,5 +328,29 @@ public class SHA224Digest
 
         doCopy(d);
     }
+
+    public byte[] getEncodedState()
+    {
+        byte[] state = new byte[52 + xOff * 4];
+
+        super.populateState(state);
+
+        Pack.intToBigEndian(H1, state, 16);
+        Pack.intToBigEndian(H2, state, 20);
+        Pack.intToBigEndian(H3, state, 24);
+        Pack.intToBigEndian(H4, state, 28);
+        Pack.intToBigEndian(H5, state, 32);
+        Pack.intToBigEndian(H6, state, 36);
+        Pack.intToBigEndian(H7, state, 40);
+        Pack.intToBigEndian(H8, state, 44);
+        Pack.intToBigEndian(xOff, state, 48);
+
+        for (int i = 0; i != xOff; i++)
+        {
+            Pack.intToBigEndian(X[i], state, 52 + (i * 4));
+        }
+
+        return state;
+    }
 }