1 files changed, 121 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/KeyFactorySpi.java b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/KeyFactorySpi.java
new file mode 100644
index 000000000..acf1f4808
--- /dev/null
+++ b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/KeyFactorySpi.java
@@ -0,0 +1,121 @@
+package org.spongycastle.jcajce.provider.asymmetric.gost;
+
+import java.io.IOException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.KeySpec;
+
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+import org.spongycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
+import org.spongycastle.asn1.pkcs.PrivateKeyInfo;
+import org.spongycastle.asn1.x509.SubjectPublicKeyInfo;
+import org.spongycastle.jcajce.provider.asymmetric.util.BaseKeyFactorySpi;
+import org.spongycastle.jce.interfaces.GOST3410PrivateKey;
+import org.spongycastle.jce.interfaces.GOST3410PublicKey;
+import org.spongycastle.jce.spec.GOST3410PrivateKeySpec;
+import org.spongycastle.jce.spec.GOST3410PublicKeyParameterSetSpec;
+import org.spongycastle.jce.spec.GOST3410PublicKeySpec;
+
+public class KeyFactorySpi
+    extends BaseKeyFactorySpi
+{
+    public KeyFactorySpi()
+    {
+    }
+
+    protected KeySpec engineGetKeySpec(
+        Key key,
+        Class spec)
+        throws InvalidKeySpecException
+    {
+        if (spec.isAssignableFrom(GOST3410PublicKeySpec.class) && key instanceof GOST3410PublicKey)
+        {
+            GOST3410PublicKey k = (GOST3410PublicKey)key;
+            GOST3410PublicKeyParameterSetSpec parameters = k.getParameters().getPublicKeyParameters();
+
+            return new GOST3410PublicKeySpec(k.getY(), parameters.getP(), parameters.getQ(), parameters.getA());
+        }
+        else if (spec.isAssignableFrom(GOST3410PrivateKeySpec.class) && key instanceof GOST3410PrivateKey)
+        {
+            GOST3410PrivateKey k = (GOST3410PrivateKey)key;
+            GOST3410PublicKeyParameterSetSpec parameters = k.getParameters().getPublicKeyParameters();
+
+            return new GOST3410PrivateKeySpec(k.getX(), parameters.getP(), parameters.getQ(), parameters.getA());
+        }
+
+        return super.engineGetKeySpec(key, spec);
+    }
+
+    protected Key engineTranslateKey(
+        Key key)
+        throws InvalidKeyException
+    {
+        if (key instanceof GOST3410PublicKey)
+        {
+            return new BCGOST3410PublicKey((GOST3410PublicKey)key);
+        }
+        else if (key instanceof GOST3410PrivateKey)
+        {
+            return new BCGOST3410PrivateKey((GOST3410PrivateKey)key);
+        }
+
+        throw new InvalidKeyException("key type unknown");
+    }
+
+    protected PrivateKey engineGeneratePrivate(
+            KeySpec    keySpec)
+    throws InvalidKeySpecException
+    {
+        if (keySpec instanceof GOST3410PrivateKeySpec)
+        {
+            return new BCGOST3410PrivateKey((GOST3410PrivateKeySpec)keySpec);
+        }
+
+        return super.engineGeneratePrivate(keySpec);
+    }
+
+    protected PublicKey engineGeneratePublic(
+            KeySpec    keySpec)
+    throws InvalidKeySpecException
+    {
+        if (keySpec instanceof GOST3410PublicKeySpec)
+        {
+            return new BCGOST3410PublicKey((GOST3410PublicKeySpec)keySpec);
+        }
+
+        return super.engineGeneratePublic(keySpec);
+    }
+
+    public PrivateKey generatePrivate(PrivateKeyInfo keyInfo)
+        throws IOException
+    {
+        ASN1ObjectIdentifier algOid = keyInfo.getPrivateKeyAlgorithm().getAlgorithm();
+
+        if (algOid.equals(CryptoProObjectIdentifiers.gostR3410_94))
+        {
+            return new BCGOST3410PrivateKey(keyInfo);
+        }
+        else
+        {
+            throw new IOException("algorithm identifier " + algOid + " in key not recognised");
+        }
+    }
+
+    public PublicKey generatePublic(SubjectPublicKeyInfo keyInfo)
+        throws IOException
+    {
+        ASN1ObjectIdentifier algOid = keyInfo.getAlgorithm().getAlgorithm();
+
+        if (algOid.equals(CryptoProObjectIdentifiers.gostR3410_94))
+        {
+            return new BCGOST3410PublicKey(keyInfo);
+        }
+        else
+        {
+            throw new IOException("algorithm identifier " + algOid + " in key not recognised");
+        }
+    }
+}