| /* |
| * linux/arch/arm64/crypto/aes-ce.S - AES cipher for ARMv8 with |
| * Crypto Extensions |
| * |
| * Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/linkage.h> |
| |
| #define AES_ENTRY(func) ENTRY(ce_ ## func) |
| #define AES_ENDPROC(func) ENDPROC(ce_ ## func) |
| |
| .arch armv8-a+crypto |
| |
| /* preload all round keys */ |
| .macro load_round_keys, rounds, rk |
| cmp \rounds, #12 |
| blo 2222f /* 128 bits */ |
| beq 1111f /* 192 bits */ |
| ld1 {v17.16b-v18.16b}, [\rk], #32 |
| 1111: ld1 {v19.16b-v20.16b}, [\rk], #32 |
| 2222: ld1 {v21.16b-v24.16b}, [\rk], #64 |
| ld1 {v25.16b-v28.16b}, [\rk], #64 |
| ld1 {v29.16b-v31.16b}, [\rk] |
| .endm |
| |
| /* prepare for encryption with key in rk[] */ |
| .macro enc_prepare, rounds, rk, ignore |
| load_round_keys \rounds, \rk |
| .endm |
| |
| /* prepare for encryption (again) but with new key in rk[] */ |
| .macro enc_switch_key, rounds, rk, ignore |
| load_round_keys \rounds, \rk |
| .endm |
| |
| /* prepare for decryption with key in rk[] */ |
| .macro dec_prepare, rounds, rk, ignore |
| load_round_keys \rounds, \rk |
| .endm |
| |
| .macro do_enc_Nx, de, mc, k, i0, i1, i2, i3 |
| aes\de \i0\().16b, \k\().16b |
| aes\mc \i0\().16b, \i0\().16b |
| .ifnb \i1 |
| aes\de \i1\().16b, \k\().16b |
| aes\mc \i1\().16b, \i1\().16b |
| .ifnb \i3 |
| aes\de \i2\().16b, \k\().16b |
| aes\mc \i2\().16b, \i2\().16b |
| aes\de \i3\().16b, \k\().16b |
| aes\mc \i3\().16b, \i3\().16b |
| .endif |
| .endif |
| .endm |
| |
| /* up to 4 interleaved encryption rounds with the same round key */ |
| .macro round_Nx, enc, k, i0, i1, i2, i3 |
| .ifc \enc, e |
| do_enc_Nx e, mc, \k, \i0, \i1, \i2, \i3 |
| .else |
| do_enc_Nx d, imc, \k, \i0, \i1, \i2, \i3 |
| .endif |
| .endm |
| |
| /* up to 4 interleaved final rounds */ |
| .macro fin_round_Nx, de, k, k2, i0, i1, i2, i3 |
| aes\de \i0\().16b, \k\().16b |
| .ifnb \i1 |
| aes\de \i1\().16b, \k\().16b |
| .ifnb \i3 |
| aes\de \i2\().16b, \k\().16b |
| aes\de \i3\().16b, \k\().16b |
| .endif |
| .endif |
| eor \i0\().16b, \i0\().16b, \k2\().16b |
| .ifnb \i1 |
| eor \i1\().16b, \i1\().16b, \k2\().16b |
| .ifnb \i3 |
| eor \i2\().16b, \i2\().16b, \k2\().16b |
| eor \i3\().16b, \i3\().16b, \k2\().16b |
| .endif |
| .endif |
| .endm |
| |
| /* up to 4 interleaved blocks */ |
| .macro do_block_Nx, enc, rounds, i0, i1, i2, i3 |
| cmp \rounds, #12 |
| blo 2222f /* 128 bits */ |
| beq 1111f /* 192 bits */ |
| round_Nx \enc, v17, \i0, \i1, \i2, \i3 |
| round_Nx \enc, v18, \i0, \i1, \i2, \i3 |
| 1111: round_Nx \enc, v19, \i0, \i1, \i2, \i3 |
| round_Nx \enc, v20, \i0, \i1, \i2, \i3 |
| 2222: .irp key, v21, v22, v23, v24, v25, v26, v27, v28, v29 |
| round_Nx \enc, \key, \i0, \i1, \i2, \i3 |
| .endr |
| fin_round_Nx \enc, v30, v31, \i0, \i1, \i2, \i3 |
| .endm |
| |
| .macro encrypt_block, in, rounds, t0, t1, t2 |
| do_block_Nx e, \rounds, \in |
| .endm |
| |
| .macro encrypt_block2x, i0, i1, rounds, t0, t1, t2 |
| do_block_Nx e, \rounds, \i0, \i1 |
| .endm |
| |
| .macro encrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2 |
| do_block_Nx e, \rounds, \i0, \i1, \i2, \i3 |
| .endm |
| |
| .macro decrypt_block, in, rounds, t0, t1, t2 |
| do_block_Nx d, \rounds, \in |
| .endm |
| |
| .macro decrypt_block2x, i0, i1, rounds, t0, t1, t2 |
| do_block_Nx d, \rounds, \i0, \i1 |
| .endm |
| |
| .macro decrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2 |
| do_block_Nx d, \rounds, \i0, \i1, \i2, \i3 |
| .endm |
| |
| #include "aes-modes.S" |
