Restore SHA-224

In the StandardNames 8 document, SHA-224 has made a comeback.

Change-Id: I2cfd04df026502efa3ccbae17eb509588f43292f

1 files changed, 76 insertions, 0 deletions

diff --git a/bcprov/src/main/java/org/bouncycastle/jcajce/provider/digest/SHA224.java b/bcprov/src/main/java/org/bouncycastle/jcajce/provider/digest/SHA224.java
new file mode 100644
index 0000000..ba06a0f
--- /dev/null
+++ b/bcprov/src/main/java/org/bouncycastle/jcajce/provider/digest/SHA224.java
@@ -0,0 +1,76 @@
+package org.bouncycastle.jcajce.provider.digest;
+
+import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
+import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
+import org.bouncycastle.crypto.CipherKeyGenerator;
+import org.bouncycastle.crypto.digests.SHA224Digest;
+import org.bouncycastle.crypto.macs.HMac;
+import org.bouncycastle.jcajce.provider.config.ConfigurableProvider;
+import org.bouncycastle.jcajce.provider.symmetric.util.BaseKeyGenerator;
+import org.bouncycastle.jcajce.provider.symmetric.util.BaseMac;
+
+public class SHA224
+{
+    private SHA224()
+    {
+
+    }
+
+    static public class Digest
+        extends BCMessageDigest
+        implements Cloneable
+    {
+        public Digest()
+        {
+            super(new SHA224Digest());
+        }
+
+        public Object clone()
+            throws CloneNotSupportedException
+        {
+            Digest d = (Digest)super.clone();
+            d.digest = new SHA224Digest((SHA224Digest)digest);
+
+            return d;
+        }
+    }
+
+    public static class HashMac
+        extends BaseMac
+    {
+        public HashMac()
+        {
+            super(new HMac(new SHA224Digest()));
+        }
+    }
+
+    public static class KeyGenerator
+        extends BaseKeyGenerator
+    {
+        public KeyGenerator()
+        {
+            super("HMACSHA224", 224, new CipherKeyGenerator());
+        }
+    }
+
+    public static class Mappings
+        extends DigestAlgorithmProvider
+    {
+        private static final String PREFIX = SHA224.class.getName();
+
+        public Mappings()
+        {
+        }
+
+        public void configure(ConfigurableProvider provider)
+        {
+            provider.addAlgorithm("MessageDigest.SHA-224", PREFIX + "$Digest");
+            provider.addAlgorithm("Alg.Alias.MessageDigest.SHA224", "SHA-224");
+            provider.addAlgorithm("Alg.Alias.MessageDigest." + NISTObjectIdentifiers.id_sha224, "SHA-224");
+
+            addHMACAlgorithm(provider, "SHA224", PREFIX + "$HashMac",  PREFIX + "$KeyGenerator");
+            addHMACAlias(provider, "SHA224", PKCSObjectIdentifiers.id_hmacWithSHA224);
+
+        }
+    }
+}