1 files changed, 131 insertions, 0 deletions
diff --git a/prov/src/main/java/org/spongycastle/pqc/jcajce/provider/gmss/BCGMSSPublicKey.java b/prov/src/main/java/org/spongycastle/pqc/jcajce/provider/gmss/BCGMSSPublicKey.java
new file mode 100644
index 00000000..b3253160
--- /dev/null
+++ b/prov/src/main/java/org/spongycastle/pqc/jcajce/provider/gmss/BCGMSSPublicKey.java
@@ -0,0 +1,131 @@
+package org.spongycastle.pqc.jcajce.provider.gmss;
+
+import java.security.PublicKey;
+
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+import org.spongycastle.crypto.CipherParameters;
+import org.spongycastle.pqc.asn1.GMSSPublicKey;
+import org.spongycastle.pqc.asn1.PQCObjectIdentifiers;
+import org.spongycastle.pqc.asn1.ParSet;
+import org.spongycastle.pqc.crypto.gmss.GMSSParameters;
+import org.spongycastle.pqc.crypto.gmss.GMSSPublicKeyParameters;
+import org.spongycastle.pqc.jcajce.provider.util.KeyUtil;
+import org.spongycastle.pqc.jcajce.spec.GMSSPublicKeySpec;
+import org.spongycastle.util.encoders.Hex;
+
+/**
+ * This class implements the GMSS public key and is usually initiated by the <a
+ * href="GMSSKeyPairGenerator">GMSSKeyPairGenerator</a>.
+ *
+ * @see org.spongycastle.pqc.crypto.gmss.GMSSKeyPairGenerator
+ * @see org.spongycastle.pqc.jcajce.spec.GMSSPublicKeySpec
+ */
+public class BCGMSSPublicKey
+    implements CipherParameters, PublicKey
+{
+
+    /**
+     *
+     */
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * The GMSS public key
+     */
+    private byte[] publicKeyBytes;
+
+    /**
+     * The GMSSParameterSet
+     */
+    private GMSSParameters gmssParameterSet;
+
+
+    private GMSSParameters gmssParams;
+
+    /**
+     * The constructor
+     *
+     * @param pub              a raw GMSS public key
+     * @param gmssParameterSet an instance of GMSS Parameterset
+     * @see org.spongycastle.pqc.crypto.gmss.GMSSKeyPairGenerator
+     */
+    public BCGMSSPublicKey(byte[] pub, GMSSParameters gmssParameterSet)
+    {
+        this.gmssParameterSet = gmssParameterSet;
+        this.publicKeyBytes = pub;
+    }
+
+    /**
+     * The constructor
+     *
+     * @param keySpec a GMSS key specification
+     */
+    protected BCGMSSPublicKey(GMSSPublicKeySpec keySpec)
+    {
+        this(keySpec.getPublicKey(), keySpec.getParameters());
+    }
+
+    public BCGMSSPublicKey(
+        GMSSPublicKeyParameters params)
+    {
+        this(params.getPublicKey(), params.getParameters());
+    }
+
+    /**
+     * Returns the name of the algorithm
+     *
+     * @return "GMSS"
+     */
+    public String getAlgorithm()
+    {
+        return "GMSS";
+    }
+
+    /**
+     * @return The GMSS public key byte array
+     */
+    public byte[] getPublicKeyBytes()
+    {
+        return publicKeyBytes;
+    }
+
+    /**
+     * @return The GMSS Parameterset
+     */
+    public GMSSParameters getParameterSet()
+    {
+        return gmssParameterSet;
+    }
+
+    /**
+     * Returns a human readable form of the GMSS public key
+     *
+     * @return A human readable form of the GMSS public key
+     */
+    public String toString()
+    {
+        String out = "GMSS public key : "
+            + new String(Hex.encode(publicKeyBytes)) + "\n"
+            + "Height of Trees: \n";
+
+        for (int i = 0; i < gmssParameterSet.getHeightOfTrees().length; i++)
+        {
+            out = out + "Layer " + i + " : "
+                + gmssParameterSet.getHeightOfTrees()[i]
+                + " WinternitzParameter: "
+                + gmssParameterSet.getWinternitzParameter()[i] + " K: "
+                + gmssParameterSet.getK()[i] + "\n";
+        }
+        return out;
+    }
+
+    public byte[] getEncoded()
+    {
+        return KeyUtil.getEncodedSubjectPublicKeyInfo(new AlgorithmIdentifier(PQCObjectIdentifiers.gmss, new ParSet(gmssParameterSet.getNumOfLayers(), gmssParameterSet.getHeightOfTrees(), gmssParameterSet.getWinternitzParameter(), gmssParameterSet.getK()).toASN1Primitive()), new GMSSPublicKey(publicKeyBytes));
+    }
+
+    public String getFormat()
+    {
+        return "X.509";
+    }
+}