Return generic error on PKESK checksum mismatch when decrypting

src/packet/public_key_encrypted_session_key.js

@@ -153,7 +153,7 @@ PublicKeyEncryptedSessionKey.prototype.decrypt = async function (key) {
   key = util.str_to_Uint8Array(decoded.substring(1, decoded.length - 2));
 
   if (!util.equalsUint8Array(checksum, util.write_checksum(key))) {
-    throw new Error('Checksum mismatch');
+    throw new Error('Decryption error');
   } else {
     this.sessionKey = key;
     this.sessionKeyAlgorithm = enums.read(enums.symmetric, decoded.charCodeAt(0));