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| /*
| * Bit sliced AES using NEON instructions
| *
| * Copyright (C) 2016 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.
| */
|
| /*
| * The algorithm implemented here is described in detail by the paper
| * 'Faster and Timing-Attack Resistant AES-GCM' by Emilia Kaesper and
| * Peter Schwabe (https://eprint.iacr.org/2009/129.pdf)
| *
| * This implementation is based primarily on the OpenSSL implementation
| * for 32-bit ARM written by Andy Polyakov <appro@openssl.org>
| */
|
| #include <linux/linkage.h>
| #include <asm/assembler.h>
|
| .text
|
| rounds .req x11
| bskey .req x12
|
| .macro in_bs_ch, b0, b1, b2, b3, b4, b5, b6, b7
| eor \b2, \b2, \b1
| eor \b5, \b5, \b6
| eor \b3, \b3, \b0
| eor \b6, \b6, \b2
| eor \b5, \b5, \b0
| eor \b6, \b6, \b3
| eor \b3, \b3, \b7
| eor \b7, \b7, \b5
| eor \b3, \b3, \b4
| eor \b4, \b4, \b5
| eor \b2, \b2, \b7
| eor \b3, \b3, \b1
| eor \b1, \b1, \b5
| .endm
|
| .macro out_bs_ch, b0, b1, b2, b3, b4, b5, b6, b7
| eor \b0, \b0, \b6
| eor \b1, \b1, \b4
| eor \b4, \b4, \b6
| eor \b2, \b2, \b0
| eor \b6, \b6, \b1
| eor \b1, \b1, \b5
| eor \b5, \b5, \b3
| eor \b3, \b3, \b7
| eor \b7, \b7, \b5
| eor \b2, \b2, \b5
| eor \b4, \b4, \b7
| .endm
|
| .macro inv_in_bs_ch, b6, b1, b2, b4, b7, b0, b3, b5
| eor \b1, \b1, \b7
| eor \b4, \b4, \b7
| eor \b7, \b7, \b5
| eor \b1, \b1, \b3
| eor \b2, \b2, \b5
| eor \b3, \b3, \b7
| eor \b6, \b6, \b1
| eor \b2, \b2, \b0
| eor \b5, \b5, \b3
| eor \b4, \b4, \b6
| eor \b0, \b0, \b6
| eor \b1, \b1, \b4
| .endm
|
| .macro inv_out_bs_ch, b6, b5, b0, b3, b7, b1, b4, b2
| eor \b1, \b1, \b5
| eor \b2, \b2, \b7
| eor \b3, \b3, \b1
| eor \b4, \b4, \b5
| eor \b7, \b7, \b5
| eor \b3, \b3, \b4
| eor \b5, \b5, \b0
| eor \b3, \b3, \b7
| eor \b6, \b6, \b2
| eor \b2, \b2, \b1
| eor \b6, \b6, \b3
| eor \b3, \b3, \b0
| eor \b5, \b5, \b6
| .endm
|
| .macro mul_gf4, x0, x1, y0, y1, t0, t1
| eor \t0, \y0, \y1
| and \t0, \t0, \x0
| eor \x0, \x0, \x1
| and \t1, \x1, \y0
| and \x0, \x0, \y1
| eor \x1, \t1, \t0
| eor \x0, \x0, \t1
| .endm
|
| .macro mul_gf4_n_gf4, x0, x1, y0, y1, t0, x2, x3, y2, y3, t1
| eor \t0, \y0, \y1
| eor \t1, \y2, \y3
| and \t0, \t0, \x0
| and \t1, \t1, \x2
| eor \x0, \x0, \x1
| eor \x2, \x2, \x3
| and \x1, \x1, \y0
| and \x3, \x3, \y2
| and \x0, \x0, \y1
| and \x2, \x2, \y3
| eor \x1, \x1, \x0
| eor \x2, \x2, \x3
| eor \x0, \x0, \t0
| eor \x3, \x3, \t1
| .endm
|
| .macro mul_gf16_2, x0, x1, x2, x3, x4, x5, x6, x7, \
| y0, y1, y2, y3, t0, t1, t2, t3
| eor \t0, \x0, \x2
| eor \t1, \x1, \x3
| mul_gf4 \x0, \x1, \y0, \y1, \t2, \t3
| eor \y0, \y0, \y2
| eor \y1, \y1, \y3
| mul_gf4_n_gf4 \t0, \t1, \y0, \y1, \t3, \x2, \x3, \y2, \y3, \t2
| eor \x0, \x0, \t0
| eor \x2, \x2, \t0
| eor \x1, \x1, \t1
| eor \x3, \x3, \t1
| eor \t0, \x4, \x6
| eor \t1, \x5, \x7
| mul_gf4_n_gf4 \t0, \t1, \y0, \y1, \t3, \x6, \x7, \y2, \y3, \t2
| eor \y0, \y0, \y2
| eor \y1, \y1, \y3
| mul_gf4 \x4, \x5, \y0, \y1, \t2, \t3
| eor \x4, \x4, \t0
| eor \x6, \x6, \t0
| eor \x5, \x5, \t1
| eor \x7, \x7, \t1
| .endm
|
| .macro inv_gf256, x0, x1, x2, x3, x4, x5, x6, x7, \
| t0, t1, t2, t3, s0, s1, s2, s3
| eor \t3, \x4, \x6
| eor \t0, \x5, \x7
| eor \t1, \x1, \x3
| eor \s1, \x7, \x6
| eor \s0, \x0, \x2
| eor \s3, \t3, \t0
| orr \t2, \t0, \t1
| and \s2, \t3, \s0
| orr \t3, \t3, \s0
| eor \s0, \s0, \t1
| and \t0, \t0, \t1
| eor \t1, \x3, \x2
| and \s3, \s3, \s0
| and \s1, \s1, \t1
| eor \t1, \x4, \x5
| eor \s0, \x1, \x0
| eor \t3, \t3, \s1
| eor \t2, \t2, \s1
| and \s1, \t1, \s0
| orr \t1, \t1, \s0
| eor \t3, \t3, \s3
| eor \t0, \t0, \s1
| eor \t2, \t2, \s2
| eor \t1, \t1, \s3
| eor \t0, \t0, \s2
| and \s0, \x7, \x3
| eor \t1, \t1, \s2
| and \s1, \x6, \x2
| and \s2, \x5, \x1
| orr \s3, \x4, \x0
| eor \t3, \t3, \s0
| eor \t1, \t1, \s2
| eor \s0, \t0, \s3
| eor \t2, \t2, \s1
| and \s2, \t3, \t1
| eor \s1, \t2, \s2
| eor \s3, \s0, \s2
| bsl \s1, \t1, \s0
| not \t0, \s0
| bsl \s0, \s1, \s3
| bsl \t0, \s1, \s3
| bsl \s3, \t3, \t2
| eor \t3, \t3, \t2
| and \s2, \s0, \s3
| eor \t1, \t1, \t0
| eor \s2, \s2, \t3
| mul_gf16_2 \x0, \x1, \x2, \x3, \x4, \x5, \x6, \x7, \
| \s3, \s2, \s1, \t1, \s0, \t0, \t2, \t3
| .endm
|
| .macro sbox, b0, b1, b2, b3, b4, b5, b6, b7, \
| t0, t1, t2, t3, s0, s1, s2, s3
| in_bs_ch \b0\().16b, \b1\().16b, \b2\().16b, \b3\().16b, \
| \b4\().16b, \b5\().16b, \b6\().16b, \b7\().16b
| inv_gf256 \b6\().16b, \b5\().16b, \b0\().16b, \b3\().16b, \
| \b7\().16b, \b1\().16b, \b4\().16b, \b2\().16b, \
| \t0\().16b, \t1\().16b, \t2\().16b, \t3\().16b, \
| \s0\().16b, \s1\().16b, \s2\().16b, \s3\().16b
| out_bs_ch \b7\().16b, \b1\().16b, \b4\().16b, \b2\().16b, \
| \b6\().16b, \b5\().16b, \b0\().16b, \b3\().16b
| .endm
|
| .macro inv_sbox, b0, b1, b2, b3, b4, b5, b6, b7, \
| t0, t1, t2, t3, s0, s1, s2, s3
| inv_in_bs_ch \b0\().16b, \b1\().16b, \b2\().16b, \b3\().16b, \
| \b4\().16b, \b5\().16b, \b6\().16b, \b7\().16b
| inv_gf256 \b5\().16b, \b1\().16b, \b2\().16b, \b6\().16b, \
| \b3\().16b, \b7\().16b, \b0\().16b, \b4\().16b, \
| \t0\().16b, \t1\().16b, \t2\().16b, \t3\().16b, \
| \s0\().16b, \s1\().16b, \s2\().16b, \s3\().16b
| inv_out_bs_ch \b3\().16b, \b7\().16b, \b0\().16b, \b4\().16b, \
| \b5\().16b, \b1\().16b, \b2\().16b, \b6\().16b
| .endm
|
| .macro enc_next_rk
| ldp q16, q17, [bskey], #128
| ldp q18, q19, [bskey, #-96]
| ldp q20, q21, [bskey, #-64]
| ldp q22, q23, [bskey, #-32]
| .endm
|
| .macro dec_next_rk
| ldp q16, q17, [bskey, #-128]!
| ldp q18, q19, [bskey, #32]
| ldp q20, q21, [bskey, #64]
| ldp q22, q23, [bskey, #96]
| .endm
|
| .macro add_round_key, x0, x1, x2, x3, x4, x5, x6, x7
| eor \x0\().16b, \x0\().16b, v16.16b
| eor \x1\().16b, \x1\().16b, v17.16b
| eor \x2\().16b, \x2\().16b, v18.16b
| eor \x3\().16b, \x3\().16b, v19.16b
| eor \x4\().16b, \x4\().16b, v20.16b
| eor \x5\().16b, \x5\().16b, v21.16b
| eor \x6\().16b, \x6\().16b, v22.16b
| eor \x7\().16b, \x7\().16b, v23.16b
| .endm
|
| .macro shift_rows, x0, x1, x2, x3, x4, x5, x6, x7, mask
| tbl \x0\().16b, {\x0\().16b}, \mask\().16b
| tbl \x1\().16b, {\x1\().16b}, \mask\().16b
| tbl \x2\().16b, {\x2\().16b}, \mask\().16b
| tbl \x3\().16b, {\x3\().16b}, \mask\().16b
| tbl \x4\().16b, {\x4\().16b}, \mask\().16b
| tbl \x5\().16b, {\x5\().16b}, \mask\().16b
| tbl \x6\().16b, {\x6\().16b}, \mask\().16b
| tbl \x7\().16b, {\x7\().16b}, \mask\().16b
| .endm
|
| .macro mix_cols, x0, x1, x2, x3, x4, x5, x6, x7, \
| t0, t1, t2, t3, t4, t5, t6, t7, inv
| ext \t0\().16b, \x0\().16b, \x0\().16b, #12
| ext \t1\().16b, \x1\().16b, \x1\().16b, #12
| eor \x0\().16b, \x0\().16b, \t0\().16b
| ext \t2\().16b, \x2\().16b, \x2\().16b, #12
| eor \x1\().16b, \x1\().16b, \t1\().16b
| ext \t3\().16b, \x3\().16b, \x3\().16b, #12
| eor \x2\().16b, \x2\().16b, \t2\().16b
| ext \t4\().16b, \x4\().16b, \x4\().16b, #12
| eor \x3\().16b, \x3\().16b, \t3\().16b
| ext \t5\().16b, \x5\().16b, \x5\().16b, #12
| eor \x4\().16b, \x4\().16b, \t4\().16b
| ext \t6\().16b, \x6\().16b, \x6\().16b, #12
| eor \x5\().16b, \x5\().16b, \t5\().16b
| ext \t7\().16b, \x7\().16b, \x7\().16b, #12
| eor \x6\().16b, \x6\().16b, \t6\().16b
| eor \t1\().16b, \t1\().16b, \x0\().16b
| eor \x7\().16b, \x7\().16b, \t7\().16b
| ext \x0\().16b, \x0\().16b, \x0\().16b, #8
| eor \t2\().16b, \t2\().16b, \x1\().16b
| eor \t0\().16b, \t0\().16b, \x7\().16b
| eor \t1\().16b, \t1\().16b, \x7\().16b
| ext \x1\().16b, \x1\().16b, \x1\().16b, #8
| eor \t5\().16b, \t5\().16b, \x4\().16b
| eor \x0\().16b, \x0\().16b, \t0\().16b
| eor \t6\().16b, \t6\().16b, \x5\().16b
| eor \x1\().16b, \x1\().16b, \t1\().16b
| ext \t0\().16b, \x4\().16b, \x4\().16b, #8
| eor \t4\().16b, \t4\().16b, \x3\().16b
| ext \t1\().16b, \x5\().16b, \x5\().16b, #8
| eor \t7\().16b, \t7\().16b, \x6\().16b
| ext \x4\().16b, \x3\().16b, \x3\().16b, #8
| eor \t3\().16b, \t3\().16b, \x2\().16b
| ext \x5\().16b, \x7\().16b, \x7\().16b, #8
| eor \t4\().16b, \t4\().16b, \x7\().16b
| ext \x3\().16b, \x6\().16b, \x6\().16b, #8
| eor \t3\().16b, \t3\().16b, \x7\().16b
| ext \x6\().16b, \x2\().16b, \x2\().16b, #8
| eor \x7\().16b, \t1\().16b, \t5\().16b
| .ifb \inv
| eor \x2\().16b, \t0\().16b, \t4\().16b
| eor \x4\().16b, \x4\().16b, \t3\().16b
| eor \x5\().16b, \x5\().16b, \t7\().16b
| eor \x3\().16b, \x3\().16b, \t6\().16b
| eor \x6\().16b, \x6\().16b, \t2\().16b
| .else
| eor \t3\().16b, \t3\().16b, \x4\().16b
| eor \x5\().16b, \x5\().16b, \t7\().16b
| eor \x2\().16b, \x3\().16b, \t6\().16b
| eor \x3\().16b, \t0\().16b, \t4\().16b
| eor \x4\().16b, \x6\().16b, \t2\().16b
| mov \x6\().16b, \t3\().16b
| .endif
| .endm
|
| .macro inv_mix_cols, x0, x1, x2, x3, x4, x5, x6, x7, \
| t0, t1, t2, t3, t4, t5, t6, t7
| ext \t0\().16b, \x0\().16b, \x0\().16b, #8
| ext \t6\().16b, \x6\().16b, \x6\().16b, #8
| ext \t7\().16b, \x7\().16b, \x7\().16b, #8
| eor \t0\().16b, \t0\().16b, \x0\().16b
| ext \t1\().16b, \x1\().16b, \x1\().16b, #8
| eor \t6\().16b, \t6\().16b, \x6\().16b
| ext \t2\().16b, \x2\().16b, \x2\().16b, #8
| eor \t7\().16b, \t7\().16b, \x7\().16b
| ext \t3\().16b, \x3\().16b, \x3\().16b, #8
| eor \t1\().16b, \t1\().16b, \x1\().16b
| ext \t4\().16b, \x4\().16b, \x4\().16b, #8
| eor \t2\().16b, \t2\().16b, \x2\().16b
| ext \t5\().16b, \x5\().16b, \x5\().16b, #8
| eor \t3\().16b, \t3\().16b, \x3\().16b
| eor \t4\().16b, \t4\().16b, \x4\().16b
| eor \t5\().16b, \t5\().16b, \x5\().16b
| eor \x0\().16b, \x0\().16b, \t6\().16b
| eor \x1\().16b, \x1\().16b, \t6\().16b
| eor \x2\().16b, \x2\().16b, \t0\().16b
| eor \x4\().16b, \x4\().16b, \t2\().16b
| eor \x3\().16b, \x3\().16b, \t1\().16b
| eor \x1\().16b, \x1\().16b, \t7\().16b
| eor \x2\().16b, \x2\().16b, \t7\().16b
| eor \x4\().16b, \x4\().16b, \t6\().16b
| eor \x5\().16b, \x5\().16b, \t3\().16b
| eor \x3\().16b, \x3\().16b, \t6\().16b
| eor \x6\().16b, \x6\().16b, \t4\().16b
| eor \x4\().16b, \x4\().16b, \t7\().16b
| eor \x5\().16b, \x5\().16b, \t7\().16b
| eor \x7\().16b, \x7\().16b, \t5\().16b
| mix_cols \x0, \x1, \x2, \x3, \x4, \x5, \x6, \x7, \
| \t0, \t1, \t2, \t3, \t4, \t5, \t6, \t7, 1
| .endm
|
| .macro swapmove_2x, a0, b0, a1, b1, n, mask, t0, t1
| ushr \t0\().2d, \b0\().2d, #\n
| ushr \t1\().2d, \b1\().2d, #\n
| eor \t0\().16b, \t0\().16b, \a0\().16b
| eor \t1\().16b, \t1\().16b, \a1\().16b
| and \t0\().16b, \t0\().16b, \mask\().16b
| and \t1\().16b, \t1\().16b, \mask\().16b
| eor \a0\().16b, \a0\().16b, \t0\().16b
| shl \t0\().2d, \t0\().2d, #\n
| eor \a1\().16b, \a1\().16b, \t1\().16b
| shl \t1\().2d, \t1\().2d, #\n
| eor \b0\().16b, \b0\().16b, \t0\().16b
| eor \b1\().16b, \b1\().16b, \t1\().16b
| .endm
|
| .macro bitslice, x7, x6, x5, x4, x3, x2, x1, x0, t0, t1, t2, t3
| movi \t0\().16b, #0x55
| movi \t1\().16b, #0x33
| swapmove_2x \x0, \x1, \x2, \x3, 1, \t0, \t2, \t3
| swapmove_2x \x4, \x5, \x6, \x7, 1, \t0, \t2, \t3
| movi \t0\().16b, #0x0f
| swapmove_2x \x0, \x2, \x1, \x3, 2, \t1, \t2, \t3
| swapmove_2x \x4, \x6, \x5, \x7, 2, \t1, \t2, \t3
| swapmove_2x \x0, \x4, \x1, \x5, 4, \t0, \t2, \t3
| swapmove_2x \x2, \x6, \x3, \x7, 4, \t0, \t2, \t3
| .endm
|
|
| .align 6
| M0: .octa 0x0004080c0105090d02060a0e03070b0f
|
| M0SR: .octa 0x0004080c05090d010a0e02060f03070b
| SR: .octa 0x0f0e0d0c0a09080b0504070600030201
| SRM0: .octa 0x01060b0c0207080d0304090e00050a0f
|
| M0ISR: .octa 0x0004080c0d0105090a0e0206070b0f03
| ISR: .octa 0x0f0e0d0c080b0a090504070602010003
| ISRM0: .octa 0x0306090c00070a0d01040b0e0205080f
|
| /*
| * void aesbs_convert_key(u8 out[], u32 const rk[], int rounds)
| */
| ENTRY(aesbs_convert_key)
| ld1 {v7.4s}, [x1], #16 // load round 0 key
| ld1 {v17.4s}, [x1], #16 // load round 1 key
|
| movi v8.16b, #0x01 // bit masks
| movi v9.16b, #0x02
| movi v10.16b, #0x04
| movi v11.16b, #0x08
| movi v12.16b, #0x10
| movi v13.16b, #0x20
| movi v14.16b, #0x40
| movi v15.16b, #0x80
| ldr q16, M0
|
| sub x2, x2, #1
| str q7, [x0], #16 // save round 0 key
|
| .Lkey_loop:
| tbl v7.16b ,{v17.16b}, v16.16b
| ld1 {v17.4s}, [x1], #16 // load next round key
|
| cmtst v0.16b, v7.16b, v8.16b
| cmtst v1.16b, v7.16b, v9.16b
| cmtst v2.16b, v7.16b, v10.16b
| cmtst v3.16b, v7.16b, v11.16b
| cmtst v4.16b, v7.16b, v12.16b
| cmtst v5.16b, v7.16b, v13.16b
| cmtst v6.16b, v7.16b, v14.16b
| cmtst v7.16b, v7.16b, v15.16b
| not v0.16b, v0.16b
| not v1.16b, v1.16b
| not v5.16b, v5.16b
| not v6.16b, v6.16b
|
| subs x2, x2, #1
| stp q0, q1, [x0], #128
| stp q2, q3, [x0, #-96]
| stp q4, q5, [x0, #-64]
| stp q6, q7, [x0, #-32]
| b.ne .Lkey_loop
|
| movi v7.16b, #0x63 // compose .L63
| eor v17.16b, v17.16b, v7.16b
| str q17, [x0]
| ret
| ENDPROC(aesbs_convert_key)
|
| .align 4
| aesbs_encrypt8:
| ldr q9, [bskey], #16 // round 0 key
| ldr q8, M0SR
| ldr q24, SR
|
| eor v10.16b, v0.16b, v9.16b // xor with round0 key
| eor v11.16b, v1.16b, v9.16b
| tbl v0.16b, {v10.16b}, v8.16b
| eor v12.16b, v2.16b, v9.16b
| tbl v1.16b, {v11.16b}, v8.16b
| eor v13.16b, v3.16b, v9.16b
| tbl v2.16b, {v12.16b}, v8.16b
| eor v14.16b, v4.16b, v9.16b
| tbl v3.16b, {v13.16b}, v8.16b
| eor v15.16b, v5.16b, v9.16b
| tbl v4.16b, {v14.16b}, v8.16b
| eor v10.16b, v6.16b, v9.16b
| tbl v5.16b, {v15.16b}, v8.16b
| eor v11.16b, v7.16b, v9.16b
| tbl v6.16b, {v10.16b}, v8.16b
| tbl v7.16b, {v11.16b}, v8.16b
|
| bitslice v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11
|
| sub rounds, rounds, #1
| b .Lenc_sbox
|
| .Lenc_loop:
| shift_rows v0, v1, v2, v3, v4, v5, v6, v7, v24
| .Lenc_sbox:
| sbox v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, \
| v13, v14, v15
| subs rounds, rounds, #1
| b.cc .Lenc_done
|
| enc_next_rk
|
| mix_cols v0, v1, v4, v6, v3, v7, v2, v5, v8, v9, v10, v11, v12, \
| v13, v14, v15
|
| add_round_key v0, v1, v2, v3, v4, v5, v6, v7
|
| b.ne .Lenc_loop
| ldr q24, SRM0
| b .Lenc_loop
|
| .Lenc_done:
| ldr q12, [bskey] // last round key
|
| bitslice v0, v1, v4, v6, v3, v7, v2, v5, v8, v9, v10, v11
|
| eor v0.16b, v0.16b, v12.16b
| eor v1.16b, v1.16b, v12.16b
| eor v4.16b, v4.16b, v12.16b
| eor v6.16b, v6.16b, v12.16b
| eor v3.16b, v3.16b, v12.16b
| eor v7.16b, v7.16b, v12.16b
| eor v2.16b, v2.16b, v12.16b
| eor v5.16b, v5.16b, v12.16b
| ret
| ENDPROC(aesbs_encrypt8)
|
| .align 4
| aesbs_decrypt8:
| lsl x9, rounds, #7
| add bskey, bskey, x9
|
| ldr q9, [bskey, #-112]! // round 0 key
| ldr q8, M0ISR
| ldr q24, ISR
|
| eor v10.16b, v0.16b, v9.16b // xor with round0 key
| eor v11.16b, v1.16b, v9.16b
| tbl v0.16b, {v10.16b}, v8.16b
| eor v12.16b, v2.16b, v9.16b
| tbl v1.16b, {v11.16b}, v8.16b
| eor v13.16b, v3.16b, v9.16b
| tbl v2.16b, {v12.16b}, v8.16b
| eor v14.16b, v4.16b, v9.16b
| tbl v3.16b, {v13.16b}, v8.16b
| eor v15.16b, v5.16b, v9.16b
| tbl v4.16b, {v14.16b}, v8.16b
| eor v10.16b, v6.16b, v9.16b
| tbl v5.16b, {v15.16b}, v8.16b
| eor v11.16b, v7.16b, v9.16b
| tbl v6.16b, {v10.16b}, v8.16b
| tbl v7.16b, {v11.16b}, v8.16b
|
| bitslice v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11
|
| sub rounds, rounds, #1
| b .Ldec_sbox
|
| .Ldec_loop:
| shift_rows v0, v1, v2, v3, v4, v5, v6, v7, v24
| .Ldec_sbox:
| inv_sbox v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, \
| v13, v14, v15
| subs rounds, rounds, #1
| b.cc .Ldec_done
|
| dec_next_rk
|
| add_round_key v0, v1, v6, v4, v2, v7, v3, v5
|
| inv_mix_cols v0, v1, v6, v4, v2, v7, v3, v5, v8, v9, v10, v11, v12, \
| v13, v14, v15
|
| b.ne .Ldec_loop
| ldr q24, ISRM0
| b .Ldec_loop
| .Ldec_done:
| ldr q12, [bskey, #-16] // last round key
|
| bitslice v0, v1, v6, v4, v2, v7, v3, v5, v8, v9, v10, v11
|
| eor v0.16b, v0.16b, v12.16b
| eor v1.16b, v1.16b, v12.16b
| eor v6.16b, v6.16b, v12.16b
| eor v4.16b, v4.16b, v12.16b
| eor v2.16b, v2.16b, v12.16b
| eor v7.16b, v7.16b, v12.16b
| eor v3.16b, v3.16b, v12.16b
| eor v5.16b, v5.16b, v12.16b
| ret
| ENDPROC(aesbs_decrypt8)
|
| /*
| * aesbs_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks)
| * aesbs_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks)
| */
| .macro __ecb_crypt, do8, o0, o1, o2, o3, o4, o5, o6, o7
| frame_push 5
|
| mov x19, x0
| mov x20, x1
| mov x21, x2
| mov x22, x3
| mov x23, x4
|
| 99: mov x5, #1
| lsl x5, x5, x23
| subs w23, w23, #8
| csel x23, x23, xzr, pl
| csel x5, x5, xzr, mi
|
| ld1 {v0.16b}, [x20], #16
| tbnz x5, #1, 0f
| ld1 {v1.16b}, [x20], #16
| tbnz x5, #2, 0f
| ld1 {v2.16b}, [x20], #16
| tbnz x5, #3, 0f
| ld1 {v3.16b}, [x20], #16
| tbnz x5, #4, 0f
| ld1 {v4.16b}, [x20], #16
| tbnz x5, #5, 0f
| ld1 {v5.16b}, [x20], #16
| tbnz x5, #6, 0f
| ld1 {v6.16b}, [x20], #16
| tbnz x5, #7, 0f
| ld1 {v7.16b}, [x20], #16
|
| 0: mov bskey, x21
| mov rounds, x22
| bl \do8
|
| st1 {\o0\().16b}, [x19], #16
| tbnz x5, #1, 1f
| st1 {\o1\().16b}, [x19], #16
| tbnz x5, #2, 1f
| st1 {\o2\().16b}, [x19], #16
| tbnz x5, #3, 1f
| st1 {\o3\().16b}, [x19], #16
| tbnz x5, #4, 1f
| st1 {\o4\().16b}, [x19], #16
| tbnz x5, #5, 1f
| st1 {\o5\().16b}, [x19], #16
| tbnz x5, #6, 1f
| st1 {\o6\().16b}, [x19], #16
| tbnz x5, #7, 1f
| st1 {\o7\().16b}, [x19], #16
|
| cbz x23, 1f
| cond_yield_neon
| b 99b
|
| 1: frame_pop
| ret
| .endm
|
| .align 4
| ENTRY(aesbs_ecb_encrypt)
| __ecb_crypt aesbs_encrypt8, v0, v1, v4, v6, v3, v7, v2, v5
| ENDPROC(aesbs_ecb_encrypt)
|
| .align 4
| ENTRY(aesbs_ecb_decrypt)
| __ecb_crypt aesbs_decrypt8, v0, v1, v6, v4, v2, v7, v3, v5
| ENDPROC(aesbs_ecb_decrypt)
|
| /*
| * aesbs_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks, u8 iv[])
| */
| .align 4
| ENTRY(aesbs_cbc_decrypt)
| frame_push 6
|
| mov x19, x0
| mov x20, x1
| mov x21, x2
| mov x22, x3
| mov x23, x4
| mov x24, x5
|
| 99: mov x6, #1
| lsl x6, x6, x23
| subs w23, w23, #8
| csel x23, x23, xzr, pl
| csel x6, x6, xzr, mi
|
| ld1 {v0.16b}, [x20], #16
| mov v25.16b, v0.16b
| tbnz x6, #1, 0f
| ld1 {v1.16b}, [x20], #16
| mov v26.16b, v1.16b
| tbnz x6, #2, 0f
| ld1 {v2.16b}, [x20], #16
| mov v27.16b, v2.16b
| tbnz x6, #3, 0f
| ld1 {v3.16b}, [x20], #16
| mov v28.16b, v3.16b
| tbnz x6, #4, 0f
| ld1 {v4.16b}, [x20], #16
| mov v29.16b, v4.16b
| tbnz x6, #5, 0f
| ld1 {v5.16b}, [x20], #16
| mov v30.16b, v5.16b
| tbnz x6, #6, 0f
| ld1 {v6.16b}, [x20], #16
| mov v31.16b, v6.16b
| tbnz x6, #7, 0f
| ld1 {v7.16b}, [x20]
|
| 0: mov bskey, x21
| mov rounds, x22
| bl aesbs_decrypt8
|
| ld1 {v24.16b}, [x24] // load IV
|
| eor v1.16b, v1.16b, v25.16b
| eor v6.16b, v6.16b, v26.16b
| eor v4.16b, v4.16b, v27.16b
| eor v2.16b, v2.16b, v28.16b
| eor v7.16b, v7.16b, v29.16b
| eor v0.16b, v0.16b, v24.16b
| eor v3.16b, v3.16b, v30.16b
| eor v5.16b, v5.16b, v31.16b
|
| st1 {v0.16b}, [x19], #16
| mov v24.16b, v25.16b
| tbnz x6, #1, 1f
| st1 {v1.16b}, [x19], #16
| mov v24.16b, v26.16b
| tbnz x6, #2, 1f
| st1 {v6.16b}, [x19], #16
| mov v24.16b, v27.16b
| tbnz x6, #3, 1f
| st1 {v4.16b}, [x19], #16
| mov v24.16b, v28.16b
| tbnz x6, #4, 1f
| st1 {v2.16b}, [x19], #16
| mov v24.16b, v29.16b
| tbnz x6, #5, 1f
| st1 {v7.16b}, [x19], #16
| mov v24.16b, v30.16b
| tbnz x6, #6, 1f
| st1 {v3.16b}, [x19], #16
| mov v24.16b, v31.16b
| tbnz x6, #7, 1f
| ld1 {v24.16b}, [x20], #16
| st1 {v5.16b}, [x19], #16
| 1: st1 {v24.16b}, [x24] // store IV
|
| cbz x23, 2f
| cond_yield_neon
| b 99b
|
| 2: frame_pop
| ret
| ENDPROC(aesbs_cbc_decrypt)
|
| .macro next_tweak, out, in, const, tmp
| sshr \tmp\().2d, \in\().2d, #63
| and \tmp\().16b, \tmp\().16b, \const\().16b
| add \out\().2d, \in\().2d, \in\().2d
| ext \tmp\().16b, \tmp\().16b, \tmp\().16b, #8
| eor \out\().16b, \out\().16b, \tmp\().16b
| .endm
|
| .align 4
| .Lxts_mul_x:
| CPU_LE( .quad 1, 0x87 )
| CPU_BE( .quad 0x87, 1 )
|
| /*
| * aesbs_xts_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks, u8 iv[])
| * aesbs_xts_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks, u8 iv[])
| */
| __xts_crypt8:
| mov x6, #1
| lsl x6, x6, x23
| subs w23, w23, #8
| csel x23, x23, xzr, pl
| csel x6, x6, xzr, mi
|
| ld1 {v0.16b}, [x20], #16
| next_tweak v26, v25, v30, v31
| eor v0.16b, v0.16b, v25.16b
| tbnz x6, #1, 0f
|
| ld1 {v1.16b}, [x20], #16
| next_tweak v27, v26, v30, v31
| eor v1.16b, v1.16b, v26.16b
| tbnz x6, #2, 0f
|
| ld1 {v2.16b}, [x20], #16
| next_tweak v28, v27, v30, v31
| eor v2.16b, v2.16b, v27.16b
| tbnz x6, #3, 0f
|
| ld1 {v3.16b}, [x20], #16
| next_tweak v29, v28, v30, v31
| eor v3.16b, v3.16b, v28.16b
| tbnz x6, #4, 0f
|
| ld1 {v4.16b}, [x20], #16
| str q29, [sp, #.Lframe_local_offset]
| eor v4.16b, v4.16b, v29.16b
| next_tweak v29, v29, v30, v31
| tbnz x6, #5, 0f
|
| ld1 {v5.16b}, [x20], #16
| str q29, [sp, #.Lframe_local_offset + 16]
| eor v5.16b, v5.16b, v29.16b
| next_tweak v29, v29, v30, v31
| tbnz x6, #6, 0f
|
| ld1 {v6.16b}, [x20], #16
| str q29, [sp, #.Lframe_local_offset + 32]
| eor v6.16b, v6.16b, v29.16b
| next_tweak v29, v29, v30, v31
| tbnz x6, #7, 0f
|
| ld1 {v7.16b}, [x20], #16
| str q29, [sp, #.Lframe_local_offset + 48]
| eor v7.16b, v7.16b, v29.16b
| next_tweak v29, v29, v30, v31
|
| 0: mov bskey, x21
| mov rounds, x22
| br x7
| ENDPROC(__xts_crypt8)
|
| .macro __xts_crypt, do8, o0, o1, o2, o3, o4, o5, o6, o7
| frame_push 6, 64
|
| mov x19, x0
| mov x20, x1
| mov x21, x2
| mov x22, x3
| mov x23, x4
| mov x24, x5
|
| 0: ldr q30, .Lxts_mul_x
| ld1 {v25.16b}, [x24]
|
| 99: adr x7, \do8
| bl __xts_crypt8
|
| ldp q16, q17, [sp, #.Lframe_local_offset]
| ldp q18, q19, [sp, #.Lframe_local_offset + 32]
|
| eor \o0\().16b, \o0\().16b, v25.16b
| eor \o1\().16b, \o1\().16b, v26.16b
| eor \o2\().16b, \o2\().16b, v27.16b
| eor \o3\().16b, \o3\().16b, v28.16b
|
| st1 {\o0\().16b}, [x19], #16
| mov v25.16b, v26.16b
| tbnz x6, #1, 1f
| st1 {\o1\().16b}, [x19], #16
| mov v25.16b, v27.16b
| tbnz x6, #2, 1f
| st1 {\o2\().16b}, [x19], #16
| mov v25.16b, v28.16b
| tbnz x6, #3, 1f
| st1 {\o3\().16b}, [x19], #16
| mov v25.16b, v29.16b
| tbnz x6, #4, 1f
|
| eor \o4\().16b, \o4\().16b, v16.16b
| eor \o5\().16b, \o5\().16b, v17.16b
| eor \o6\().16b, \o6\().16b, v18.16b
| eor \o7\().16b, \o7\().16b, v19.16b
|
| st1 {\o4\().16b}, [x19], #16
| tbnz x6, #5, 1f
| st1 {\o5\().16b}, [x19], #16
| tbnz x6, #6, 1f
| st1 {\o6\().16b}, [x19], #16
| tbnz x6, #7, 1f
| st1 {\o7\().16b}, [x19], #16
|
| cbz x23, 1f
| st1 {v25.16b}, [x24]
|
| cond_yield_neon 0b
| b 99b
|
| 1: st1 {v25.16b}, [x24]
| frame_pop
| ret
| .endm
|
| ENTRY(aesbs_xts_encrypt)
| __xts_crypt aesbs_encrypt8, v0, v1, v4, v6, v3, v7, v2, v5
| ENDPROC(aesbs_xts_encrypt)
|
| ENTRY(aesbs_xts_decrypt)
| __xts_crypt aesbs_decrypt8, v0, v1, v6, v4, v2, v7, v3, v5
| ENDPROC(aesbs_xts_decrypt)
|
| .macro next_ctr, v
| mov \v\().d[1], x8
| adds x8, x8, #1
| mov \v\().d[0], x7
| adc x7, x7, xzr
| rev64 \v\().16b, \v\().16b
| .endm
|
| /*
| * aesbs_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[],
| * int rounds, int blocks, u8 iv[], u8 final[])
| */
| ENTRY(aesbs_ctr_encrypt)
| frame_push 8
|
| mov x19, x0
| mov x20, x1
| mov x21, x2
| mov x22, x3
| mov x23, x4
| mov x24, x5
| mov x25, x6
|
| cmp x25, #0
| cset x26, ne
| add x23, x23, x26 // do one extra block if final
|
| 98: ldp x7, x8, [x24]
| ld1 {v0.16b}, [x24]
| CPU_LE( rev x7, x7 )
| CPU_LE( rev x8, x8 )
| adds x8, x8, #1
| adc x7, x7, xzr
|
| 99: mov x9, #1
| lsl x9, x9, x23
| subs w23, w23, #8
| csel x23, x23, xzr, pl
| csel x9, x9, xzr, le
|
| tbnz x9, #1, 0f
| next_ctr v1
| tbnz x9, #2, 0f
| next_ctr v2
| tbnz x9, #3, 0f
| next_ctr v3
| tbnz x9, #4, 0f
| next_ctr v4
| tbnz x9, #5, 0f
| next_ctr v5
| tbnz x9, #6, 0f
| next_ctr v6
| tbnz x9, #7, 0f
| next_ctr v7
|
| 0: mov bskey, x21
| mov rounds, x22
| bl aesbs_encrypt8
|
| lsr x9, x9, x26 // disregard the extra block
| tbnz x9, #0, 0f
|
| ld1 {v8.16b}, [x20], #16
| eor v0.16b, v0.16b, v8.16b
| st1 {v0.16b}, [x19], #16
| tbnz x9, #1, 1f
|
| ld1 {v9.16b}, [x20], #16
| eor v1.16b, v1.16b, v9.16b
| st1 {v1.16b}, [x19], #16
| tbnz x9, #2, 2f
|
| ld1 {v10.16b}, [x20], #16
| eor v4.16b, v4.16b, v10.16b
| st1 {v4.16b}, [x19], #16
| tbnz x9, #3, 3f
|
| ld1 {v11.16b}, [x20], #16
| eor v6.16b, v6.16b, v11.16b
| st1 {v6.16b}, [x19], #16
| tbnz x9, #4, 4f
|
| ld1 {v12.16b}, [x20], #16
| eor v3.16b, v3.16b, v12.16b
| st1 {v3.16b}, [x19], #16
| tbnz x9, #5, 5f
|
| ld1 {v13.16b}, [x20], #16
| eor v7.16b, v7.16b, v13.16b
| st1 {v7.16b}, [x19], #16
| tbnz x9, #6, 6f
|
| ld1 {v14.16b}, [x20], #16
| eor v2.16b, v2.16b, v14.16b
| st1 {v2.16b}, [x19], #16
| tbnz x9, #7, 7f
|
| ld1 {v15.16b}, [x20], #16
| eor v5.16b, v5.16b, v15.16b
| st1 {v5.16b}, [x19], #16
|
| 8: next_ctr v0
| st1 {v0.16b}, [x24]
| cbz x23, .Lctr_done
|
| cond_yield_neon 98b
| b 99b
|
| .Lctr_done:
| frame_pop
| ret
|
| /*
| * If we are handling the tail of the input (x6 != NULL), return the
| * final keystream block back to the caller.
| */
| 0: cbz x25, 8b
| st1 {v0.16b}, [x25]
| b 8b
| 1: cbz x25, 8b
| st1 {v1.16b}, [x25]
| b 8b
| 2: cbz x25, 8b
| st1 {v4.16b}, [x25]
| b 8b
| 3: cbz x25, 8b
| st1 {v6.16b}, [x25]
| b 8b
| 4: cbz x25, 8b
| st1 {v3.16b}, [x25]
| b 8b
| 5: cbz x25, 8b
| st1 {v7.16b}, [x25]
| b 8b
| 6: cbz x25, 8b
| st1 {v2.16b}, [x25]
| b 8b
| 7: cbz x25, 8b
| st1 {v5.16b}, [x25]
| b 8b
| ENDPROC(aesbs_ctr_encrypt)
|
|
