OpenSSL.CIPHER.Final C# (CSharp) Méthode

        public int Final(byte[] ob, int off)
        {
            int olen = 0;

            if (ob == null) {
                if (_CIPHER.EVP_CipherFinal_ex(this._handle, IntPtr.Zero, ref olen) == 0)
                    throw new EVPException();
                return olen;
            }

            if (ob != null) {
                if (off < 0 || off >= ob.Length)
                    throw new EVPException();
                olen = ob.Length - off;
            } else
                off = 0;

            fixed (byte *obp = ob) {
                IntPtr p = new IntPtr(obp + off);

                if (_CIPHER.EVP_CipherFinal_ex(this._handle, p, ref olen) == 0)
                    throw new EVPException();
            }

            return olen;
        }