Execute become-spongy.sh

https://github.com/rtyley/spongycastle/blob/3040af/become-spongy.sh

1 files changed, 133 insertions, 0 deletions

diff --git a/pkix/src/main/java/org/spongycastle/operator/jcajce/JceAsymmetricKeyUnwrapper.java b/pkix/src/main/java/org/spongycastle/operator/jcajce/JceAsymmetricKeyUnwrapper.java
new file mode 100644
index 00000000..0b5cbf60
--- /dev/null
+++ b/pkix/src/main/java/org/spongycastle/operator/jcajce/JceAsymmetricKeyUnwrapper.java
@@ -0,0 +1,133 @@
+package org.spongycastle.operator.jcajce;
+
+import java.security.AlgorithmParameters;
+import java.security.GeneralSecurityException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.PrivateKey;
+import java.security.Provider;
+import java.security.ProviderException;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.spec.SecretKeySpec;
+
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+import org.spongycastle.jcajce.util.DefaultJcaJceHelper;
+import org.spongycastle.jcajce.util.NamedJcaJceHelper;
+import org.spongycastle.jcajce.util.ProviderJcaJceHelper;
+import org.spongycastle.operator.AsymmetricKeyUnwrapper;
+import org.spongycastle.operator.GenericKey;
+import org.spongycastle.operator.OperatorException;
+
+public class JceAsymmetricKeyUnwrapper
+    extends AsymmetricKeyUnwrapper
+{
+    private OperatorHelper helper = new OperatorHelper(new DefaultJcaJceHelper());
+    private Map extraMappings = new HashMap();
+    private PrivateKey privKey;
+
+    public JceAsymmetricKeyUnwrapper(AlgorithmIdentifier algorithmIdentifier, PrivateKey privKey)
+    {
+        super(algorithmIdentifier);
+
+        this.privKey = privKey;
+    }
+
+    public JceAsymmetricKeyUnwrapper setProvider(Provider provider)
+    {
+        this.helper = new OperatorHelper(new ProviderJcaJceHelper(provider));
+
+        return this;
+    }
+
+    public JceAsymmetricKeyUnwrapper setProvider(String providerName)
+    {
+        this.helper = new OperatorHelper(new NamedJcaJceHelper(providerName));
+
+        return this;
+    }
+
+    /**
+     * Internally algorithm ids are converted into cipher names using a lookup table. For some providers
+     * the standard lookup table won't work. Use this method to establish a specific mapping from an
+     * algorithm identifier to a specific algorithm.
+     * <p>
+     *     For example:
+     * <pre>
+     *     unwrapper.setAlgorithmMapping(PKCSObjectIdentifiers.rsaEncryption, "RSA");
+     * </pre>
+     * </p>
+     * @param algorithm  OID of algorithm in recipient.
+     * @param algorithmName JCE algorithm name to use.
+     * @return  the current Unwrapper.
+     */
+    public JceAsymmetricKeyUnwrapper setAlgorithmMapping(ASN1ObjectIdentifier algorithm, String algorithmName)
+    {
+        extraMappings.put(algorithm, algorithmName);
+
+        return this;
+    }
+
+    public GenericKey generateUnwrappedKey(AlgorithmIdentifier encryptedKeyAlgorithm, byte[] encryptedKey)
+        throws OperatorException
+    {
+        try
+        {
+            Key sKey = null;
+
+            Cipher keyCipher = helper.createAsymmetricWrapper(this.getAlgorithmIdentifier().getAlgorithm(), extraMappings);
+            AlgorithmParameters algParams = helper.createAlgorithmParameters(this.getAlgorithmIdentifier());
+
+            try
+            {
+                if (algParams != null)
+                {
+                    keyCipher.init(Cipher.UNWRAP_MODE, privKey, algParams);
+                }
+                else
+                {
+                    keyCipher.init(Cipher.UNWRAP_MODE, privKey);
+                }
+                sKey = keyCipher.unwrap(encryptedKey, helper.getKeyAlgorithmName(encryptedKeyAlgorithm.getAlgorithm()), Cipher.SECRET_KEY);
+            }
+            catch (GeneralSecurityException e)
+            {
+            }
+            catch (IllegalStateException e)
+            {
+            }
+            catch (UnsupportedOperationException e)
+            {
+            }
+            catch (ProviderException e)
+            {
+            }
+
+            // some providers do not support UNWRAP (this appears to be only for asymmetric algorithms)
+            if (sKey == null)
+            {
+                keyCipher.init(Cipher.DECRYPT_MODE, privKey);
+                sKey = new SecretKeySpec(keyCipher.doFinal(encryptedKey), encryptedKeyAlgorithm.getAlgorithm().getId());
+            }
+
+            return new JceGenericKey(encryptedKeyAlgorithm, sKey);
+        }
+        catch (InvalidKeyException e)
+        {
+            throw new OperatorException("key invalid: " + e.getMessage(), e);
+        }
+        catch (IllegalBlockSizeException e)
+        {
+            throw new OperatorException("illegal blocksize: " + e.getMessage(), e);
+        }
+        catch (BadPaddingException e)
+        {
+            throw new OperatorException("bad padding: " + e.getMessage(), e);
+        }
+    }
+}