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

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

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

            CK_MECHANISM ckMechanism = mechanism.CkMechanism;
            
            CKR rv = _p11.C_DigestInit(_sessionId, ref ckMechanism);
            if (rv != CKR.CKR_OK)
                throw new Pkcs11Exception("C_DigestInit", rv);
            
            rv = _p11.C_DigestKey(_sessionId, keyHandle.ObjectId);
            if (rv != CKR.CKR_OK)
                throw new Pkcs11Exception("C_DigestKey", rv);
            
            ulong digestLen = 0;
            rv = _p11.C_DigestFinal(_sessionId, null, ref digestLen);
            if (rv != CKR.CKR_OK)
                throw new Pkcs11Exception("C_DigestFinal", rv);
            
            byte[] digest = new byte[digestLen];
            rv = _p11.C_DigestFinal(_sessionId, digest, ref digestLen);
            if (rv != CKR.CKR_OK)
                throw new Pkcs11Exception("C_DigestFinal", rv);

            if (digest.Length != Convert.ToInt32(digestLen))
                Array.Resize(ref digest, Convert.ToInt32(digestLen));

            return digest;
        }