Add PublicKeyUtils.isEncryptionAlgorithm()

Author: vanitasvitae

pg/src/main/java/org/bouncycastle/bcpg/PublicKeyUtils.java

@@ -30,26 +30,26 @@ public static boolean isSigningAlgorithm(int publicKeyAlgorithm)
         }
     }
 
-//    /**
-//     * Return true, if the public key algorithm that corresponds to the given ID is capable of encryption.
-//     * @param publicKeyAlgorithm public key algorithm id
-//     * @return true if algorithm can encrypt
-//     */
-//    public static boolean isEncryptionAlgorithm(int publicKeyAlgorithm)
-//    {
-//        switch (publicKeyAlgorithm)
-//        {
-//        case PublicKeyAlgorithmTags.RSA_GENERAL:
-//        case PublicKeyAlgorithmTags.RSA_ENCRYPT:
-//        case PublicKeyAlgorithmTags.ELGAMAL_ENCRYPT:
-//        case PublicKeyAlgorithmTags.ECDH:
-//        case PublicKeyAlgorithmTags.ELGAMAL_GENERAL:
-//        case PublicKeyAlgorithmTags.DIFFIE_HELLMAN:
-//        case PublicKeyAlgorithmTags.X25519:
-//        case PublicKeyAlgorithmTags.X448:
-//            return true;
-//        default:
-//            return false;
-//        }
-//    }
+    /**
+     * Return true, if the public key algorithm that corresponds to the given ID is capable of encryption.
+     * @param publicKeyAlgorithm public key algorithm id
+     * @return true if algorithm can encrypt
+     */
+    public static boolean isEncryptionAlgorithm(int publicKeyAlgorithm)
+    {
+        switch (publicKeyAlgorithm)
+        {
+        case PublicKeyAlgorithmTags.RSA_GENERAL:
+        case PublicKeyAlgorithmTags.RSA_ENCRYPT:
+        case PublicKeyAlgorithmTags.ELGAMAL_ENCRYPT:
+        case PublicKeyAlgorithmTags.ECDH:
+        case PublicKeyAlgorithmTags.ELGAMAL_GENERAL:
+        case PublicKeyAlgorithmTags.DIFFIE_HELLMAN:
+        case PublicKeyAlgorithmTags.X25519:
+        case PublicKeyAlgorithmTags.X448:
+            return true;
+        default:
+            return false;
+        }
+    }
 }