Net.Pkcs11Interop.HighLevelAPI81.Session.Decrypt C# (CSharp) Method

        public byte[] Decrypt(Mechanism mechanism, ObjectHandle keyHandle, byte[] encryptedData)
        {
            if (this._disposed)
                throw new ObjectDisposedException(this.GetType().FullName);

            if (mechanism == null)
                throw new ArgumentNullException("mechanism");
            
            if (keyHandle == null)
                throw new ArgumentNullException("keyHandle");
            
            if (encryptedData == null)
                throw new ArgumentNullException("encryptedData");

            CK_MECHANISM ckMechanism = mechanism.CkMechanism;

            CKR rv = _p11.C_DecryptInit(_sessionId, ref ckMechanism, keyHandle.ObjectId);
            if (rv != CKR.CKR_OK)
                throw new Pkcs11Exception("C_DecryptInit", rv);

            ulong decryptedDataLen = 0;
            rv = _p11.C_Decrypt(_sessionId, encryptedData, Convert.ToUInt64(encryptedData.Length), null, ref decryptedDataLen);
            if (rv != CKR.CKR_OK)
                throw new Pkcs11Exception("C_Decrypt", rv);

            byte[] decryptedData = new byte[decryptedDataLen];
            rv = _p11.C_Decrypt(_sessionId, encryptedData, Convert.ToUInt64(encryptedData.Length), decryptedData, ref decryptedDataLen);
            if (rv != CKR.CKR_OK)
                throw new Pkcs11Exception("C_Decrypt", rv);

            if (decryptedData.Length != Convert.ToInt32(decryptedDataLen))
                Array.Resize(ref decryptedData, Convert.ToInt32(decryptedDataLen));

            return decryptedData;
        }