Package: aes_sbox_canright_pkg
- File: aes_sbox_canright_pkg.sv
Description
Copyright lowRISC contributors.
Licensed under the Apache License, Version 2.0, see LICENSE for details.
SPDX-License-Identifier: Apache-2.0
AES Canright SBox package
For details, see the following documents:
- Canright, "A very compact Rijndael S-box", technical report
available at https://hdl.handle.net/10945/25608 - Canright, "A very compact 'perfectly masked' S-box for AES (corrected)", paper
available at https://eprint.iacr.org/2009/011.pdf
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| A2X | logic [7:0] | undefined | Basis conversion matrices to convert between polynomial basis A, normal basis X and basis S incorporating the bit matrix of the SBox. More specifically, multiplication by X2X performs the transformation from normal basis X into polynomial basis A, followed by the affine transformation (substep 2). Likewise, multiplication by S2X performs the inverse affine transformation followed by the transformation from polynomial basis A to normal basis X. (see Appendix A of the technical report) |
| X2A | logic [7:0] | undefined | |
| X2S | logic [7:0] | undefined | |
| S2X | logic [7:0] | undefined |
Functions
- aes_mul_gf2p2 (logic [1:0] g,
logic [1:0]) return (logic [1:0])
- aes_scale_omega2_gf2p2 (logic [1:0]) return (logic [1:0])
Description
Scale by Omega^2 = N in GF(2^2), using normal basis [Omega^2, Omega]
(see Figure 16 in the technical report)
- aes_scale_omega_gf2p2 (logic [1:0]) return (logic [1:0])
Description
Scale by Omega = N^2 in GF(2^2), using normal basis [Omega^2, Omega]
(see Figure 15 in the technical report)
- aes_square_gf2p2 (logic [1:0]) return (logic [1:0])
Description
Square in GF(2^2), using normal basis [Omega^2, Omega]
(see Figures 8 and 10 in the technical report)
- aes_mul_gf2p4 (logic [3:0] gamma,
logic [3:0]) return (logic [3:0])
Description
Multiplication in GF(2^4), using normal basis [alpha^8, alpha^2]
(see Figure 13 in the technical report)
- aes_square_scale_gf2p4_gf2p2 (logic [3:0]) return (logic [3:0])
Description
Square and scale by nu in GF(2^4)/GF(2^2), using normal basis [alpha^8, alpha^2]
(see Figure 19 as well as Appendix A of the technical report)