private byte[] InverseSecondRound(byte[] cipherText, byte[] roundKey) { var inversedRoundKey = Aes16Helper.AddRoundKey(cipherText, roundKey); var inversedShiftRow = Aes16Helper.ShiftRow(inversedRoundKey); var inversedNibbleSubstitution = Aes16Helper.InverseNibbleSubstitution(inversedShiftRow); return(inversedNibbleSubstitution); }
private byte[] InverseFirstRound(byte[] firstRoundCipherText, byte[] roundKey) { var inversedRoundKey = Aes16Helper.AddRoundKey(firstRoundCipherText, roundKey); var inversedMixColumns = Aes16Helper.InverseMixColumns(inversedRoundKey); var inversedShiftRow = Aes16Helper.ShiftRow(inversedMixColumns); var inversedNibbleSubstitution = Aes16Helper.InverseNibbleSubstitution(inversedShiftRow); return(inversedNibbleSubstitution); }