[AFP-000] : Add PGP Utils

pom.xml

@@ -28,6 +28,11 @@
             <artifactId>azure-storage</artifactId>
             <version>8.6.4</version>
         </dependency>
+        <dependency>
+            <groupId>org.bouncycastle</groupId>
+            <artifactId>bcpg-jdk16</artifactId>
+            <version>1.46</version>
+        </dependency>
 
         <!-- Test -->
         <dependency>

src/main/java/com/nisum/demo/blobStorage/DecryptService.java

+package com.nisum.demo.blobStorage;
+
+import java.io.IOException;
+import java.security.NoSuchProviderException;
+import java.security.SignatureException;
+
+import org.bouncycastle.openpgp.PGPException;
+
+public abstract class DecryptService {
+
+    /**
+     * Decrypt the input file and move it to output folder.
+     *
+     * @param inputPath encrypted file path
+     * @param outputPath destination file path
+     * @param secretKeyPath secret key file path
+     * @param partnerPublicKeyPath partner public key file path
+     * @param passPhrase pass phrase use to generate secret key
+     * @throws NoSuchProviderException thrown when security provider not found
+     * @throws IOException throws when unable accessing file path.
+     * @throws PGPException thrown when error performing PGP decryption
+     * @throws SignatureException when error performing verification of signature
+     */
+    abstract void decrypt(String inputPath, String outputPath, String secretKeyPath, String partnerPublicKeyPath, String passPhrase)
+            throws NoSuchProviderException, IOException, PGPException, SignatureException;
+
+}