forked from luck/tmp_suning_uos_patched
b4d0c0aad5
Instead of allowing the Crypto Extensions algorithms to be selected when using a toolchain that does not support them, and complain about it at build time, use the information we have about the compiler to prevent them from being selected in the first place. Users that are stuck with a GCC version <4.8 are unlikely to care about these routines anyway, and it cleans up the Makefile considerably. While at it, add explicit 'armv8-a' CPU specifiers to the code that uses the 'crypto-neon-fp-armv8' FPU specifier so we don't regress Clang, which will complain about this in version 10 and later. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
702 lines
15 KiB
ArmAsm
702 lines
15 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* aes-ce-core.S - AES in CBC/CTR/XTS mode using ARMv8 Crypto Extensions
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*
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* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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.text
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.arch armv8-a
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.fpu crypto-neon-fp-armv8
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.align 3
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.macro enc_round, state, key
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aese.8 \state, \key
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aesmc.8 \state, \state
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.endm
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.macro dec_round, state, key
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aesd.8 \state, \key
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aesimc.8 \state, \state
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.endm
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.macro enc_dround, key1, key2
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enc_round q0, \key1
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enc_round q0, \key2
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.endm
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.macro dec_dround, key1, key2
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dec_round q0, \key1
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dec_round q0, \key2
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.endm
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.macro enc_fround, key1, key2, key3
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enc_round q0, \key1
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aese.8 q0, \key2
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veor q0, q0, \key3
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.endm
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.macro dec_fround, key1, key2, key3
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dec_round q0, \key1
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aesd.8 q0, \key2
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veor q0, q0, \key3
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.endm
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.macro enc_dround_4x, key1, key2
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enc_round q0, \key1
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enc_round q1, \key1
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enc_round q2, \key1
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enc_round q3, \key1
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enc_round q0, \key2
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enc_round q1, \key2
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enc_round q2, \key2
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enc_round q3, \key2
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.endm
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.macro dec_dround_4x, key1, key2
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dec_round q0, \key1
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dec_round q1, \key1
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dec_round q2, \key1
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dec_round q3, \key1
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dec_round q0, \key2
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dec_round q1, \key2
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dec_round q2, \key2
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dec_round q3, \key2
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.endm
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.macro enc_fround_4x, key1, key2, key3
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enc_round q0, \key1
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enc_round q1, \key1
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enc_round q2, \key1
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enc_round q3, \key1
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aese.8 q0, \key2
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aese.8 q1, \key2
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aese.8 q2, \key2
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aese.8 q3, \key2
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veor q0, q0, \key3
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veor q1, q1, \key3
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veor q2, q2, \key3
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veor q3, q3, \key3
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.endm
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.macro dec_fround_4x, key1, key2, key3
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dec_round q0, \key1
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dec_round q1, \key1
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dec_round q2, \key1
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dec_round q3, \key1
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aesd.8 q0, \key2
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aesd.8 q1, \key2
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aesd.8 q2, \key2
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aesd.8 q3, \key2
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veor q0, q0, \key3
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veor q1, q1, \key3
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veor q2, q2, \key3
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veor q3, q3, \key3
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.endm
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.macro do_block, dround, fround
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cmp r3, #12 @ which key size?
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vld1.32 {q10-q11}, [ip]!
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\dround q8, q9
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vld1.32 {q12-q13}, [ip]!
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\dround q10, q11
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vld1.32 {q10-q11}, [ip]!
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\dround q12, q13
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vld1.32 {q12-q13}, [ip]!
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\dround q10, q11
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blo 0f @ AES-128: 10 rounds
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vld1.32 {q10-q11}, [ip]!
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\dround q12, q13
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beq 1f @ AES-192: 12 rounds
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vld1.32 {q12-q13}, [ip]
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\dround q10, q11
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0: \fround q12, q13, q14
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bx lr
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1: \fround q10, q11, q14
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bx lr
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.endm
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/*
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* Internal, non-AAPCS compliant functions that implement the core AES
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* transforms. These should preserve all registers except q0 - q2 and ip
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* Arguments:
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* q0 : first in/output block
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* q1 : second in/output block (_4x version only)
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* q2 : third in/output block (_4x version only)
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* q3 : fourth in/output block (_4x version only)
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* q8 : first round key
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* q9 : secound round key
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* q14 : final round key
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* r2 : address of round key array
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* r3 : number of rounds
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*/
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.align 6
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aes_encrypt:
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add ip, r2, #32 @ 3rd round key
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.Laes_encrypt_tweak:
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do_block enc_dround, enc_fround
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ENDPROC(aes_encrypt)
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.align 6
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aes_decrypt:
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add ip, r2, #32 @ 3rd round key
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do_block dec_dround, dec_fround
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ENDPROC(aes_decrypt)
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.align 6
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aes_encrypt_4x:
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add ip, r2, #32 @ 3rd round key
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do_block enc_dround_4x, enc_fround_4x
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ENDPROC(aes_encrypt_4x)
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.align 6
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aes_decrypt_4x:
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add ip, r2, #32 @ 3rd round key
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do_block dec_dround_4x, dec_fround_4x
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ENDPROC(aes_decrypt_4x)
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.macro prepare_key, rk, rounds
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add ip, \rk, \rounds, lsl #4
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vld1.32 {q8-q9}, [\rk] @ load first 2 round keys
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vld1.32 {q14}, [ip] @ load last round key
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.endm
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/*
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* aes_ecb_encrypt(u8 out[], u8 const in[], u32 const rk[], int rounds,
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* int blocks)
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* aes_ecb_decrypt(u8 out[], u8 const in[], u32 const rk[], int rounds,
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* int blocks)
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*/
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ENTRY(ce_aes_ecb_encrypt)
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push {r4, lr}
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ldr r4, [sp, #8]
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prepare_key r2, r3
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.Lecbencloop4x:
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subs r4, r4, #4
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bmi .Lecbenc1x
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vld1.8 {q0-q1}, [r1]!
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vld1.8 {q2-q3}, [r1]!
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bl aes_encrypt_4x
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vst1.8 {q0-q1}, [r0]!
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vst1.8 {q2-q3}, [r0]!
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b .Lecbencloop4x
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.Lecbenc1x:
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adds r4, r4, #4
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beq .Lecbencout
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.Lecbencloop:
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vld1.8 {q0}, [r1]!
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bl aes_encrypt
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vst1.8 {q0}, [r0]!
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subs r4, r4, #1
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bne .Lecbencloop
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.Lecbencout:
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pop {r4, pc}
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ENDPROC(ce_aes_ecb_encrypt)
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ENTRY(ce_aes_ecb_decrypt)
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push {r4, lr}
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ldr r4, [sp, #8]
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prepare_key r2, r3
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.Lecbdecloop4x:
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subs r4, r4, #4
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bmi .Lecbdec1x
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vld1.8 {q0-q1}, [r1]!
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vld1.8 {q2-q3}, [r1]!
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bl aes_decrypt_4x
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vst1.8 {q0-q1}, [r0]!
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vst1.8 {q2-q3}, [r0]!
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b .Lecbdecloop4x
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.Lecbdec1x:
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adds r4, r4, #4
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beq .Lecbdecout
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.Lecbdecloop:
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vld1.8 {q0}, [r1]!
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bl aes_decrypt
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vst1.8 {q0}, [r0]!
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subs r4, r4, #1
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bne .Lecbdecloop
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.Lecbdecout:
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pop {r4, pc}
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ENDPROC(ce_aes_ecb_decrypt)
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/*
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* aes_cbc_encrypt(u8 out[], u8 const in[], u32 const rk[], int rounds,
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* int blocks, u8 iv[])
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* aes_cbc_decrypt(u8 out[], u8 const in[], u32 const rk[], int rounds,
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* int blocks, u8 iv[])
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*/
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ENTRY(ce_aes_cbc_encrypt)
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push {r4-r6, lr}
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ldrd r4, r5, [sp, #16]
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vld1.8 {q0}, [r5]
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prepare_key r2, r3
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.Lcbcencloop:
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vld1.8 {q1}, [r1]! @ get next pt block
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veor q0, q0, q1 @ ..and xor with iv
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bl aes_encrypt
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vst1.8 {q0}, [r0]!
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subs r4, r4, #1
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bne .Lcbcencloop
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vst1.8 {q0}, [r5]
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pop {r4-r6, pc}
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ENDPROC(ce_aes_cbc_encrypt)
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ENTRY(ce_aes_cbc_decrypt)
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push {r4-r6, lr}
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ldrd r4, r5, [sp, #16]
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vld1.8 {q15}, [r5] @ keep iv in q15
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prepare_key r2, r3
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.Lcbcdecloop4x:
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subs r4, r4, #4
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bmi .Lcbcdec1x
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vld1.8 {q0-q1}, [r1]!
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vld1.8 {q2-q3}, [r1]!
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vmov q4, q0
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vmov q5, q1
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vmov q6, q2
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vmov q7, q3
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bl aes_decrypt_4x
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veor q0, q0, q15
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veor q1, q1, q4
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veor q2, q2, q5
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veor q3, q3, q6
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vmov q15, q7
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vst1.8 {q0-q1}, [r0]!
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vst1.8 {q2-q3}, [r0]!
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b .Lcbcdecloop4x
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.Lcbcdec1x:
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adds r4, r4, #4
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beq .Lcbcdecout
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vmov q6, q14 @ preserve last round key
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.Lcbcdecloop:
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vld1.8 {q0}, [r1]! @ get next ct block
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veor q14, q15, q6 @ combine prev ct with last key
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vmov q15, q0
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bl aes_decrypt
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vst1.8 {q0}, [r0]!
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subs r4, r4, #1
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bne .Lcbcdecloop
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.Lcbcdecout:
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vst1.8 {q15}, [r5] @ keep iv in q15
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pop {r4-r6, pc}
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ENDPROC(ce_aes_cbc_decrypt)
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/*
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* ce_aes_cbc_cts_encrypt(u8 out[], u8 const in[], u32 const rk[],
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* int rounds, int bytes, u8 const iv[])
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* ce_aes_cbc_cts_decrypt(u8 out[], u8 const in[], u32 const rk[],
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* int rounds, int bytes, u8 const iv[])
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*/
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ENTRY(ce_aes_cbc_cts_encrypt)
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push {r4-r6, lr}
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ldrd r4, r5, [sp, #16]
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movw ip, :lower16:.Lcts_permute_table
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movt ip, :upper16:.Lcts_permute_table
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sub r4, r4, #16
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add lr, ip, #32
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add ip, ip, r4
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sub lr, lr, r4
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vld1.8 {q5}, [ip]
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vld1.8 {q6}, [lr]
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add ip, r1, r4
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vld1.8 {q0}, [r1] @ overlapping loads
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vld1.8 {q3}, [ip]
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vld1.8 {q1}, [r5] @ get iv
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prepare_key r2, r3
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veor q0, q0, q1 @ xor with iv
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bl aes_encrypt
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vtbl.8 d4, {d0-d1}, d10
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vtbl.8 d5, {d0-d1}, d11
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vtbl.8 d2, {d6-d7}, d12
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vtbl.8 d3, {d6-d7}, d13
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veor q0, q0, q1
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bl aes_encrypt
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add r4, r0, r4
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vst1.8 {q2}, [r4] @ overlapping stores
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vst1.8 {q0}, [r0]
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pop {r4-r6, pc}
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ENDPROC(ce_aes_cbc_cts_encrypt)
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ENTRY(ce_aes_cbc_cts_decrypt)
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push {r4-r6, lr}
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ldrd r4, r5, [sp, #16]
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movw ip, :lower16:.Lcts_permute_table
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movt ip, :upper16:.Lcts_permute_table
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sub r4, r4, #16
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add lr, ip, #32
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add ip, ip, r4
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sub lr, lr, r4
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vld1.8 {q5}, [ip]
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vld1.8 {q6}, [lr]
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add ip, r1, r4
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vld1.8 {q0}, [r1] @ overlapping loads
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vld1.8 {q1}, [ip]
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vld1.8 {q3}, [r5] @ get iv
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prepare_key r2, r3
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bl aes_decrypt
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vtbl.8 d4, {d0-d1}, d10
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vtbl.8 d5, {d0-d1}, d11
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vtbx.8 d0, {d2-d3}, d12
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vtbx.8 d1, {d2-d3}, d13
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veor q1, q1, q2
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bl aes_decrypt
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veor q0, q0, q3 @ xor with iv
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add r4, r0, r4
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vst1.8 {q1}, [r4] @ overlapping stores
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vst1.8 {q0}, [r0]
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pop {r4-r6, pc}
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ENDPROC(ce_aes_cbc_cts_decrypt)
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/*
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* aes_ctr_encrypt(u8 out[], u8 const in[], u32 const rk[], int rounds,
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* int blocks, u8 ctr[])
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*/
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ENTRY(ce_aes_ctr_encrypt)
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push {r4-r6, lr}
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ldrd r4, r5, [sp, #16]
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vld1.8 {q7}, [r5] @ load ctr
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prepare_key r2, r3
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vmov r6, s31 @ keep swabbed ctr in r6
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rev r6, r6
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cmn r6, r4 @ 32 bit overflow?
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bcs .Lctrloop
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.Lctrloop4x:
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subs r4, r4, #4
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bmi .Lctr1x
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add r6, r6, #1
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vmov q0, q7
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vmov q1, q7
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rev ip, r6
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add r6, r6, #1
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vmov q2, q7
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vmov s7, ip
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rev ip, r6
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add r6, r6, #1
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vmov q3, q7
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vmov s11, ip
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rev ip, r6
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add r6, r6, #1
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vmov s15, ip
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vld1.8 {q4-q5}, [r1]!
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vld1.8 {q6}, [r1]!
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vld1.8 {q15}, [r1]!
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bl aes_encrypt_4x
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veor q0, q0, q4
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veor q1, q1, q5
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veor q2, q2, q6
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veor q3, q3, q15
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rev ip, r6
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vst1.8 {q0-q1}, [r0]!
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vst1.8 {q2-q3}, [r0]!
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vmov s31, ip
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b .Lctrloop4x
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.Lctr1x:
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adds r4, r4, #4
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beq .Lctrout
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.Lctrloop:
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vmov q0, q7
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bl aes_encrypt
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adds r6, r6, #1 @ increment BE ctr
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rev ip, r6
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vmov s31, ip
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bcs .Lctrcarry
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.Lctrcarrydone:
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subs r4, r4, #1
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bmi .Lctrtailblock @ blocks < 0 means tail block
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vld1.8 {q3}, [r1]!
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veor q3, q0, q3
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vst1.8 {q3}, [r0]!
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bne .Lctrloop
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.Lctrout:
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vst1.8 {q7}, [r5] @ return next CTR value
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pop {r4-r6, pc}
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.Lctrtailblock:
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vst1.8 {q0}, [r0, :64] @ return the key stream
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b .Lctrout
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.Lctrcarry:
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.irp sreg, s30, s29, s28
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vmov ip, \sreg @ load next word of ctr
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rev ip, ip @ ... to handle the carry
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adds ip, ip, #1
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rev ip, ip
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vmov \sreg, ip
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bcc .Lctrcarrydone
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.endr
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b .Lctrcarrydone
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ENDPROC(ce_aes_ctr_encrypt)
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/*
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* aes_xts_encrypt(u8 out[], u8 const in[], u32 const rk1[], int rounds,
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* int bytes, u8 iv[], u32 const rk2[], int first)
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* aes_xts_decrypt(u8 out[], u8 const in[], u32 const rk1[], int rounds,
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* int bytes, u8 iv[], u32 const rk2[], int first)
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*/
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.macro next_tweak, out, in, const, tmp
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vshr.s64 \tmp, \in, #63
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vand \tmp, \tmp, \const
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vadd.u64 \out, \in, \in
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vext.8 \tmp, \tmp, \tmp, #8
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veor \out, \out, \tmp
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.endm
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ce_aes_xts_init:
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vmov.i32 d30, #0x87 @ compose tweak mask vector
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vmovl.u32 q15, d30
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vshr.u64 d30, d31, #7
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ldrd r4, r5, [sp, #16] @ load args
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ldr r6, [sp, #28]
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vld1.8 {q0}, [r5] @ load iv
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teq r6, #1 @ start of a block?
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bxne lr
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@ Encrypt the IV in q0 with the second AES key. This should only
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@ be done at the start of a block.
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ldr r6, [sp, #24] @ load AES key 2
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prepare_key r6, r3
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add ip, r6, #32 @ 3rd round key of key 2
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b .Laes_encrypt_tweak @ tail call
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ENDPROC(ce_aes_xts_init)
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ENTRY(ce_aes_xts_encrypt)
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push {r4-r6, lr}
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bl ce_aes_xts_init @ run shared prologue
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prepare_key r2, r3
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vmov q4, q0
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teq r6, #0 @ start of a block?
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bne .Lxtsenc4x
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.Lxtsencloop4x:
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next_tweak q4, q4, q15, q10
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.Lxtsenc4x:
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subs r4, r4, #64
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bmi .Lxtsenc1x
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vld1.8 {q0-q1}, [r1]! @ get 4 pt blocks
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vld1.8 {q2-q3}, [r1]!
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next_tweak q5, q4, q15, q10
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veor q0, q0, q4
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next_tweak q6, q5, q15, q10
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veor q1, q1, q5
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next_tweak q7, q6, q15, q10
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veor q2, q2, q6
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veor q3, q3, q7
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bl aes_encrypt_4x
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veor q0, q0, q4
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veor q1, q1, q5
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veor q2, q2, q6
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veor q3, q3, q7
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vst1.8 {q0-q1}, [r0]! @ write 4 ct blocks
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vst1.8 {q2-q3}, [r0]!
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vmov q4, q7
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teq r4, #0
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beq .Lxtsencret
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b .Lxtsencloop4x
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.Lxtsenc1x:
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adds r4, r4, #64
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beq .Lxtsencout
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subs r4, r4, #16
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bmi .LxtsencctsNx
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.Lxtsencloop:
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vld1.8 {q0}, [r1]!
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.Lxtsencctsout:
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veor q0, q0, q4
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bl aes_encrypt
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veor q0, q0, q4
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teq r4, #0
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beq .Lxtsencout
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subs r4, r4, #16
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next_tweak q4, q4, q15, q6
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bmi .Lxtsenccts
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vst1.8 {q0}, [r0]!
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b .Lxtsencloop
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.Lxtsencout:
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vst1.8 {q0}, [r0]
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.Lxtsencret:
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vst1.8 {q4}, [r5]
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pop {r4-r6, pc}
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.LxtsencctsNx:
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vmov q0, q3
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sub r0, r0, #16
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.Lxtsenccts:
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movw ip, :lower16:.Lcts_permute_table
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movt ip, :upper16:.Lcts_permute_table
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add r1, r1, r4 @ rewind input pointer
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add r4, r4, #16 @ # bytes in final block
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add lr, ip, #32
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add ip, ip, r4
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sub lr, lr, r4
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add r4, r0, r4 @ output address of final block
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vld1.8 {q1}, [r1] @ load final partial block
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vld1.8 {q2}, [ip]
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vld1.8 {q3}, [lr]
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vtbl.8 d4, {d0-d1}, d4
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vtbl.8 d5, {d0-d1}, d5
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vtbx.8 d0, {d2-d3}, d6
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vtbx.8 d1, {d2-d3}, d7
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vst1.8 {q2}, [r4] @ overlapping stores
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mov r4, #0
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b .Lxtsencctsout
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ENDPROC(ce_aes_xts_encrypt)
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ENTRY(ce_aes_xts_decrypt)
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push {r4-r6, lr}
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bl ce_aes_xts_init @ run shared prologue
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prepare_key r2, r3
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vmov q4, q0
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/* subtract 16 bytes if we are doing CTS */
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tst r4, #0xf
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subne r4, r4, #0x10
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teq r6, #0 @ start of a block?
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bne .Lxtsdec4x
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.Lxtsdecloop4x:
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next_tweak q4, q4, q15, q10
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.Lxtsdec4x:
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subs r4, r4, #64
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bmi .Lxtsdec1x
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vld1.8 {q0-q1}, [r1]! @ get 4 ct blocks
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vld1.8 {q2-q3}, [r1]!
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next_tweak q5, q4, q15, q10
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veor q0, q0, q4
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next_tweak q6, q5, q15, q10
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veor q1, q1, q5
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next_tweak q7, q6, q15, q10
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veor q2, q2, q6
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veor q3, q3, q7
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bl aes_decrypt_4x
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veor q0, q0, q4
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veor q1, q1, q5
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veor q2, q2, q6
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veor q3, q3, q7
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vst1.8 {q0-q1}, [r0]! @ write 4 pt blocks
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vst1.8 {q2-q3}, [r0]!
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vmov q4, q7
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teq r4, #0
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beq .Lxtsdecout
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b .Lxtsdecloop4x
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.Lxtsdec1x:
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adds r4, r4, #64
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beq .Lxtsdecout
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subs r4, r4, #16
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.Lxtsdecloop:
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vld1.8 {q0}, [r1]!
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bmi .Lxtsdeccts
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.Lxtsdecctsout:
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veor q0, q0, q4
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bl aes_decrypt
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veor q0, q0, q4
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vst1.8 {q0}, [r0]!
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teq r4, #0
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beq .Lxtsdecout
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subs r4, r4, #16
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next_tweak q4, q4, q15, q6
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b .Lxtsdecloop
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.Lxtsdecout:
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vst1.8 {q4}, [r5]
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pop {r4-r6, pc}
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.Lxtsdeccts:
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movw ip, :lower16:.Lcts_permute_table
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movt ip, :upper16:.Lcts_permute_table
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add r1, r1, r4 @ rewind input pointer
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add r4, r4, #16 @ # bytes in final block
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add lr, ip, #32
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add ip, ip, r4
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sub lr, lr, r4
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add r4, r0, r4 @ output address of final block
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next_tweak q5, q4, q15, q6
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vld1.8 {q1}, [r1] @ load final partial block
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vld1.8 {q2}, [ip]
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vld1.8 {q3}, [lr]
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veor q0, q0, q5
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bl aes_decrypt
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veor q0, q0, q5
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vtbl.8 d4, {d0-d1}, d4
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vtbl.8 d5, {d0-d1}, d5
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vtbx.8 d0, {d2-d3}, d6
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vtbx.8 d1, {d2-d3}, d7
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vst1.8 {q2}, [r4] @ overlapping stores
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mov r4, #0
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b .Lxtsdecctsout
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ENDPROC(ce_aes_xts_decrypt)
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/*
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* u32 ce_aes_sub(u32 input) - use the aese instruction to perform the
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* AES sbox substitution on each byte in
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* 'input'
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*/
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ENTRY(ce_aes_sub)
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vdup.32 q1, r0
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veor q0, q0, q0
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aese.8 q0, q1
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vmov r0, s0
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bx lr
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ENDPROC(ce_aes_sub)
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/*
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* void ce_aes_invert(u8 *dst, u8 *src) - perform the Inverse MixColumns
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* operation on round key *src
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*/
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ENTRY(ce_aes_invert)
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vld1.32 {q0}, [r1]
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aesimc.8 q0, q0
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vst1.32 {q0}, [r0]
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bx lr
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ENDPROC(ce_aes_invert)
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.section ".rodata", "a"
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.align 6
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.Lcts_permute_table:
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.byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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.byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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.byte 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7
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.byte 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf
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.byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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.byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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