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

        public byte[] VerifyRecover(Mechanism mechanism, ObjectHandle keyHandle, byte[] signature, out bool isValid)
        {
            if (this._disposed)
                throw new ObjectDisposedException(this.GetType().FullName);

            if (mechanism == null)
                throw new ArgumentNullException("mechanism");
            
            if (keyHandle == null)
                throw new ArgumentNullException("keyHandle");
            
            if (signature == null)
                throw new ArgumentNullException("signature");
            
            CK_MECHANISM ckMechanism = mechanism.CkMechanism;

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

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

            byte[] data = new byte[dataLen];
            rv = _p11.C_VerifyRecover(_sessionId, signature, Convert.ToUInt64(signature.Length), data, ref dataLen);
            if (rv == CKR.CKR_OK)
                isValid = true;
            else if (rv == CKR.CKR_SIGNATURE_INVALID)
                isValid = false;
            else 
                throw new Pkcs11Exception("C_VerifyRecover", rv);

            if (data.Length != Convert.ToInt32(dataLen))
                Array.Resize(ref data, Convert.ToInt32(dataLen));

            return data;
        }