1 files changed, 76 insertions, 0 deletions
diff --git a/certService/src/main/java/org/onap/oom/certservice/cmpv2client/impl/protections/PkiMessageProtection.java b/certService/src/main/java/org/onap/oom/certservice/cmpv2client/impl/protections/PkiMessageProtection.java
new file mode 100644
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--- /dev/null
+++ b/certService/src/main/java/org/onap/oom/certservice/cmpv2client/impl/protections/PkiMessageProtection.java
@@ -0,0 +1,76 @@
+/*-
+ * ============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.DERBitString;
+import org.bouncycastle.asn1.cmp.PKIBody;
+import org.bouncycastle.asn1.cmp.PKIHeader;
+import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
+import org.onap.oom.certservice.cmpv2client.exceptions.CmpClientException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.security.GeneralSecurityException;
+
+import static org.onap.oom.certservice.cmpv2client.impl.CmpUtil.generateProtectedBytes;
+
+/**
+ * Representation of PKIMessage protection. Complies with RFC4210 (Certificate Management Protocol
+ * (CMP)) and RFC4211 (Certificate Request Message Format (CRMF)) standards.
+ */
+public abstract class PkiMessageProtection {
+
+    private static final Logger LOG = LoggerFactory.getLogger(PkiMessageProtection.class);
+
+    /**
+     * Takes PKIHeader and PKIBody as parameters and generates protection bytes.
+     *
+     * @return bytes representing protection wrapped into DERBitString object.
+     */
+    public DERBitString generatePkiMessageProtection(PKIHeader pkiHeader, PKIBody pkiBody) throws CmpClientException {
+        try {
+            byte[] protectedBytes = generateProtectedBytes(pkiHeader, pkiBody);
+            byte[] protectionBytes = generateProtectionBytes(protectedBytes);
+            return new DERBitString(protectionBytes);
+        } catch (GeneralSecurityException ex) {
+            CmpClientException cmpClientException =
+                    new CmpClientException(
+                            "Exception occurred while generating protection for PKIMessage", ex);
+            LOG.error("Exception occurred while generating the protection for PKIMessage");
+            throw cmpClientException;
+        }
+    }
+
+    /**
+     * Returns Algorithm Identifier for protection of PKIMessage.
+     *
+     * @return Algorithm Identifier.
+     */
+    public abstract AlgorithmIdentifier getAlgorithmIdentifier();
+
+    /**
+     * Takes encoded bytes of PKIMessage (PKIHeader and PKIBody) and generates protection bytes.
+     *
+     * @return bytes representing protection.
+     */
+    abstract byte[] generateProtectionBytes(byte[] protectedBytes) throws GeneralSecurityException;
+
+}