1 files changed, 26 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/crypto/tls/TlsDSSSigner.java b/core/src/main/java/org/spongycastle/crypto/tls/TlsDSSSigner.java
new file mode 100644
index 00000000..bc26c036
--- /dev/null
+++ b/core/src/main/java/org/spongycastle/crypto/tls/TlsDSSSigner.java
@@ -0,0 +1,26 @@
+package org.spongycastle.crypto.tls;
+
+import org.spongycastle.crypto.DSA;
+import org.spongycastle.crypto.params.AsymmetricKeyParameter;
+import org.spongycastle.crypto.params.DSAPublicKeyParameters;
+import org.spongycastle.crypto.signers.DSASigner;
+import org.spongycastle.crypto.signers.HMacDSAKCalculator;
+
+public class TlsDSSSigner
+    extends TlsDSASigner
+{
+    public boolean isValidPublicKey(AsymmetricKeyParameter publicKey)
+    {
+        return publicKey instanceof DSAPublicKeyParameters;
+    }
+
+    protected DSA createDSAImpl(short hashAlgorithm)
+    {
+        return new DSASigner(new HMacDSAKCalculator(TlsUtils.createHash(hashAlgorithm)));
+    }
+
+    protected short getSignatureAlgorithm()
+    {
+        return SignatureAlgorithm.dsa;
+    }
+}