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/*
* linux/arch/arm64/crypto/aes-modes.S - chaining mode wrappers for AES
*
* Copyright (C) 2013 - 2017 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.
*/
/* included by aes-ce.S and aes-neon.S */
.text
.align 4
aes_encrypt_block4x:
encrypt_block4x v0, v1, v2, v3, w22, x21, x8, w7
ret
ENDPROC(aes_encrypt_block4x)
aes_decrypt_block4x:
decrypt_block4x v0, v1, v2, v3, w22, x21, x8, w7
ret
ENDPROC(aes_decrypt_block4x)
/*
* aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
* int blocks)
* aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
* int blocks)
*/
AES_ENTRY(aes_ecb_encrypt)
frame_push 5
mov x19, x0
mov x20, x1
mov x21, x2
mov x22, x3
mov x23, x4
.Lecbencrestart:
enc_prepare w22, x21, x5
.LecbencloopNx:
subs w23, w23, #4
bmi .Lecbenc1x
ld1 {v0.16b-v3.16b}, [x20], #64 /* get 4 pt blocks */
bl aes_encrypt_block4x
st1 {v0.16b-v3.16b}, [x19], #64
cond_yield_neon .Lecbencrestart
b .LecbencloopNx
.Lecbenc1x:
adds w23, w23, #4
beq .Lecbencout
.Lecbencloop:
ld1 {v0.16b}, [x20], #16 /* get next pt block */
encrypt_block v0, w22, x21, x5, w6
st1 {v0.16b}, [x19], #16
subs w23, w23, #1
bne .Lecbencloop
.Lecbencout:
frame_pop
ret
AES_ENDPROC(aes_ecb_encrypt)
AES_ENTRY(aes_ecb_decrypt)
frame_push 5
mov x19, x0
mov x20, x1
mov x21, x2
mov x22, x3
mov x23, x4
.Lecbdecrestart:
dec_prepare w22, x21, x5
.LecbdecloopNx:
subs w23, w23, #4
bmi .Lecbdec1x
ld1 {v0.16b-v3.16b}, [x20], #64 /* get 4 ct blocks */
bl aes_decrypt_block4x
st1 {v0.16b-v3.16b}, [x19], #64
cond_yield_neon .Lecbdecrestart
b .LecbdecloopNx
.Lecbdec1x:
adds w23, w23, #4
beq .Lecbdecout
.Lecbdecloop:
ld1 {v0.16b}, [x20], #16 /* get next ct block */
decrypt_block v0, w22, x21, x5, w6
st1 {v0.16b}, [x19], #16
subs w23, w23, #1
bne .Lecbdecloop
.Lecbdecout:
frame_pop
ret
AES_ENDPROC(aes_ecb_decrypt)
/*
* aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
* int blocks, u8 iv[])
* aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
* int blocks, u8 iv[])
*/
AES_ENTRY(aes_cbc_encrypt)
frame_push 6
mov x19, x0
mov x20, x1
mov x21, x2
mov x22, x3
mov x23, x4
mov x24, x5
.Lcbcencrestart:
ld1 {v4.16b}, [x24] /* get iv */
enc_prepare w22, x21, x6
.Lcbcencloop4x:
subs w23, w23, #4
bmi .Lcbcenc1x
ld1 {v0.16b-v3.16b}, [x20], #64 /* get 4 pt blocks */
eor v0.16b, v0.16b, v4.16b /* ..and xor with iv */
encrypt_block v0, w22, x21, x6, w7
eor v1.16b, v1.16b, v0.16b
encrypt_block v1, w22, x21, x6, w7
eor v2.16b, v2.16b, v1.16b
encrypt_block v2, w22, x21, x6, w7
eor v3.16b, v3.16b, v2.16b
encrypt_block v3, w22, x21, x6, w7
st1 {v0.16b-v3.16b}, [x19], #64
mov v4.16b, v3.16b
st1 {v4.16b}, [x24] /* return iv */
cond_yield_neon .Lcbcencrestart
b .Lcbcencloop4x
.Lcbcenc1x:
adds w23, w23, #4
beq .Lcbcencout
.Lcbcencloop:
ld1 {v0.16b}, [x20], #16 /* get next pt block */
eor v4.16b, v4.16b, v0.16b /* ..and xor with iv */
encrypt_block v4, w22, x21, x6, w7
st1 {v4.16b}, [x19], #16
subs w23, w23, #1
bne .Lcbcencloop
.Lcbcencout:
st1 {v4.16b}, [x24] /* return iv */
frame_pop
ret
AES_ENDPROC(aes_cbc_encrypt)
AES_ENTRY(aes_cbc_decrypt)
frame_push 6
mov x19, x0
mov x20, x1
mov x21, x2
mov x22, x3
mov x23, x4
mov x24, x5
.Lcbcdecrestart:
ld1 {v7.16b}, [x24] /* get iv */
dec_prepare w22, x21, x6
.LcbcdecloopNx:
subs w23, w23, #4
bmi .Lcbcdec1x
ld1 {v0.16b-v3.16b}, [x20], #64 /* get 4 ct blocks */
mov v4.16b, v0.16b
mov v5.16b, v1.16b
mov v6.16b, v2.16b
bl aes_decrypt_block4x
sub x20, x20, #16
eor v0.16b, v0.16b, v7.16b
eor v1.16b, v1.16b, v4.16b
ld1 {v7.16b}, [x20], #16 /* reload 1 ct block */
eor v2.16b, v2.16b, v5.16b
eor v3.16b, v3.16b, v6.16b
st1 {v0.16b-v3.16b}, [x19], #64
st1 {v7.16b}, [x24] /* return iv */
cond_yield_neon .Lcbcdecrestart
b .LcbcdecloopNx
.Lcbcdec1x:
adds w23, w23, #4
beq .Lcbcdecout
.Lcbcdecloop:
ld1 {v1.16b}, [x20], #16 /* get next ct block */
mov v0.16b, v1.16b /* ...and copy to v0 */
decrypt_block v0, w22, x21, x6, w7
eor v0.16b, v0.16b, v7.16b /* xor with iv => pt */
mov v7.16b, v1.16b /* ct is next iv */
st1 {v0.16b}, [x19], #16
subs w23, w23, #1
bne .Lcbcdecloop
.Lcbcdecout:
st1 {v7.16b}, [x24] /* return iv */
frame_pop
ret
AES_ENDPROC(aes_cbc_decrypt)
/*
* aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
* int blocks, u8 ctr[])
*/
AES_ENTRY(aes_ctr_encrypt)
frame_push 6
mov x19, x0
mov x20, x1
mov x21, x2
mov x22, x3
mov x23, x4
mov x24, x5
.Lctrrestart:
enc_prepare w22, x21, x6
ld1 {v4.16b}, [x24]
umov x6, v4.d[1] /* keep swabbed ctr in reg */
rev x6, x6
.LctrloopNx:
subs w23, w23, #4
bmi .Lctr1x
cmn w6, #4 /* 32 bit overflow? */
bcs .Lctr1x
ldr q8, =0x30000000200000001 /* addends 1,2,3[,0] */
dup v7.4s, w6
mov v0.16b, v4.16b
add v7.4s, v7.4s, v8.4s
mov v1.16b, v4.16b
rev32 v8.16b, v7.16b
mov v2.16b, v4.16b
mov v3.16b, v4.16b
mov v1.s[3], v8.s[0]
mov v2.s[3], v8.s[1]
mov v3.s[3], v8.s[2]
ld1 {v5.16b-v7.16b}, [x20], #48 /* get 3 input blocks */
bl aes_encrypt_block4x
eor v0.16b, v5.16b, v0.16b
ld1 {v5.16b}, [x20],
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