Наследование: GeneralDigest
        /**
         * Copy constructor.  This will copy the state of the provided
         * message digest.
         */
        public Sha1Digest(Sha1Digest t)
            : base(t)
        {
            H1 = t.H1;
            H2 = t.H2;
            H3 = t.H3;
            H4 = t.H4;
            H5 = t.H5;

            Array.Copy(t.X, 0, X, 0, t.X.Length);
            xOff = t.xOff;
        }
        /**
         * Copy constructor.  This will copy the state of the provided
         * message digest.
         */
        public Sha1Digest(Sha1Digest t)
            : base(t)
        {
            H1 = t.H1;
            H2 = t.H2;
            H3 = t.H3;
            H4 = t.H4;
            H5 = t.H5;

            Array.Copy(t.X, 0, X, 0, t.X.Length);
            xOff = t.xOff;
        }