1 files changed, 63 insertions, 0 deletions
diff --git a/certService/src/main/java/org/onap/oom/certservice/cmpv2client/impl/protections/SignatureProtection.java b/certService/src/main/java/org/onap/oom/certservice/cmpv2client/impl/protections/SignatureProtection.java
new file mode 100644
index 00000000..faf99c96
--- /dev/null
+++ b/certService/src/main/java/org/onap/oom/certservice/cmpv2client/impl/protections/SignatureProtection.java
@@ -0,0 +1,63 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nokia.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.oom.certservice.cmpv2client.impl.protections;
+
+
+import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
+import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+import org.bouncycastle.operator.DefaultSignatureAlgorithmIdentifierFinder;
+
+import java.security.GeneralSecurityException;
+import java.security.PrivateKey;
+import java.security.Signature;
+
+/**
+ * Implementation of signature PKIMessage protection
+ */
+public class SignatureProtection extends PkiMessageProtection {
+
+    private static final AlgorithmIdentifier SHA256_RSA_ALGORITHM = new DefaultSignatureAlgorithmIdentifierFinder()
+            .find("SHA256withRSA");
+
+    private final PrivateKey oldPrivateKey;
+
+    public SignatureProtection(PrivateKey privateKey) {
+        this.oldPrivateKey = privateKey;
+    }
+
+    @Override
+    public AlgorithmIdentifier getAlgorithmIdentifier() {
+        return SHA256_RSA_ALGORITHM;
+    }
+
+    @Override
+    byte[] generateProtectionBytes(byte[] protectedBytes) throws GeneralSecurityException {
+        Signature signature =
+                Signature.getInstance(
+                        PKCSObjectIdentifiers.sha256WithRSAEncryption.getId(),
+                        BouncyCastleProvider.PROVIDER_NAME);
+        signature.initSign(oldPrivateKey);
+        signature.update(protectedBytes, 0, protectedBytes.length);
+        return signature.sign();
+    }
+
+}