726 lines
17 KiB
ArmAsm
726 lines
17 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/arm64/crypto/aes-modes.S - chaining mode wrappers for AES
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*
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* Copyright (C) 2013 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
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*/
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/* included by aes-ce.S and aes-neon.S */
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.text
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.align 4
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#ifndef MAX_STRIDE
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#define MAX_STRIDE 4
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#endif
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#if MAX_STRIDE == 4
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#define ST4(x...) x
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#define ST5(x...)
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#else
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#define ST4(x...)
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#define ST5(x...) x
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#endif
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SYM_FUNC_START_LOCAL(aes_encrypt_block4x)
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encrypt_block4x v0, v1, v2, v3, w3, x2, x8, w7
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ret
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SYM_FUNC_END(aes_encrypt_block4x)
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SYM_FUNC_START_LOCAL(aes_decrypt_block4x)
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decrypt_block4x v0, v1, v2, v3, w3, x2, x8, w7
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ret
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SYM_FUNC_END(aes_decrypt_block4x)
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#if MAX_STRIDE == 5
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SYM_FUNC_START_LOCAL(aes_encrypt_block5x)
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encrypt_block5x v0, v1, v2, v3, v4, w3, x2, x8, w7
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ret
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SYM_FUNC_END(aes_encrypt_block5x)
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SYM_FUNC_START_LOCAL(aes_decrypt_block5x)
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decrypt_block5x v0, v1, v2, v3, v4, w3, x2, x8, w7
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ret
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SYM_FUNC_END(aes_decrypt_block5x)
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#endif
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/*
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* aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks)
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* aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks)
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*/
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AES_FUNC_START(aes_ecb_encrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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enc_prepare w3, x2, x5
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.LecbencloopNx:
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subs w4, w4, #MAX_STRIDE
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bmi .Lecbenc1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
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ST4( bl aes_encrypt_block4x )
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ST5( ld1 {v4.16b}, [x1], #16 )
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ST5( bl aes_encrypt_block5x )
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st1 {v0.16b-v3.16b}, [x0], #64
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ST5( st1 {v4.16b}, [x0], #16 )
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b .LecbencloopNx
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.Lecbenc1x:
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adds w4, w4, #MAX_STRIDE
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beq .Lecbencout
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.Lecbencloop:
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ld1 {v0.16b}, [x1], #16 /* get next pt block */
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encrypt_block v0, w3, x2, x5, w6
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st1 {v0.16b}, [x0], #16
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subs w4, w4, #1
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bne .Lecbencloop
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.Lecbencout:
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ldp x29, x30, [sp], #16
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ret
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AES_FUNC_END(aes_ecb_encrypt)
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AES_FUNC_START(aes_ecb_decrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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dec_prepare w3, x2, x5
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.LecbdecloopNx:
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subs w4, w4, #MAX_STRIDE
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bmi .Lecbdec1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
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ST4( bl aes_decrypt_block4x )
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ST5( ld1 {v4.16b}, [x1], #16 )
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ST5( bl aes_decrypt_block5x )
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st1 {v0.16b-v3.16b}, [x0], #64
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ST5( st1 {v4.16b}, [x0], #16 )
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b .LecbdecloopNx
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.Lecbdec1x:
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adds w4, w4, #MAX_STRIDE
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beq .Lecbdecout
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.Lecbdecloop:
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ld1 {v0.16b}, [x1], #16 /* get next ct block */
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decrypt_block v0, w3, x2, x5, w6
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st1 {v0.16b}, [x0], #16
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subs w4, w4, #1
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bne .Lecbdecloop
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.Lecbdecout:
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ldp x29, x30, [sp], #16
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ret
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AES_FUNC_END(aes_ecb_decrypt)
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/*
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* aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks, u8 iv[])
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* aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks, u8 iv[])
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* aes_essiv_cbc_encrypt(u8 out[], u8 const in[], u32 const rk1[],
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* int rounds, int blocks, u8 iv[],
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* u32 const rk2[]);
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* aes_essiv_cbc_decrypt(u8 out[], u8 const in[], u32 const rk1[],
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* int rounds, int blocks, u8 iv[],
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* u32 const rk2[]);
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*/
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AES_FUNC_START(aes_essiv_cbc_encrypt)
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ld1 {v4.16b}, [x5] /* get iv */
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mov w8, #14 /* AES-256: 14 rounds */
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enc_prepare w8, x6, x7
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encrypt_block v4, w8, x6, x7, w9
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enc_switch_key w3, x2, x6
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b .Lcbcencloop4x
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AES_FUNC_START(aes_cbc_encrypt)
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ld1 {v4.16b}, [x5] /* get iv */
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enc_prepare w3, x2, x6
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.Lcbcencloop4x:
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subs w4, w4, #4
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bmi .Lcbcenc1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
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eor v0.16b, v0.16b, v4.16b /* ..and xor with iv */
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encrypt_block v0, w3, x2, x6, w7
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eor v1.16b, v1.16b, v0.16b
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encrypt_block v1, w3, x2, x6, w7
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eor v2.16b, v2.16b, v1.16b
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encrypt_block v2, w3, x2, x6, w7
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eor v3.16b, v3.16b, v2.16b
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encrypt_block v3, w3, x2, x6, w7
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st1 {v0.16b-v3.16b}, [x0], #64
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mov v4.16b, v3.16b
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b .Lcbcencloop4x
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.Lcbcenc1x:
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adds w4, w4, #4
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beq .Lcbcencout
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.Lcbcencloop:
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ld1 {v0.16b}, [x1], #16 /* get next pt block */
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eor v4.16b, v4.16b, v0.16b /* ..and xor with iv */
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encrypt_block v4, w3, x2, x6, w7
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st1 {v4.16b}, [x0], #16
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subs w4, w4, #1
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bne .Lcbcencloop
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.Lcbcencout:
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st1 {v4.16b}, [x5] /* return iv */
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ret
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AES_FUNC_END(aes_cbc_encrypt)
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AES_FUNC_END(aes_essiv_cbc_encrypt)
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AES_FUNC_START(aes_essiv_cbc_decrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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ld1 {cbciv.16b}, [x5] /* get iv */
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mov w8, #14 /* AES-256: 14 rounds */
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enc_prepare w8, x6, x7
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encrypt_block cbciv, w8, x6, x7, w9
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b .Lessivcbcdecstart
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AES_FUNC_START(aes_cbc_decrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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ld1 {cbciv.16b}, [x5] /* get iv */
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.Lessivcbcdecstart:
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dec_prepare w3, x2, x6
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.LcbcdecloopNx:
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subs w4, w4, #MAX_STRIDE
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bmi .Lcbcdec1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
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#if MAX_STRIDE == 5
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ld1 {v4.16b}, [x1], #16 /* get 1 ct block */
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mov v5.16b, v0.16b
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mov v6.16b, v1.16b
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mov v7.16b, v2.16b
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bl aes_decrypt_block5x
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sub x1, x1, #32
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eor v0.16b, v0.16b, cbciv.16b
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eor v1.16b, v1.16b, v5.16b
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ld1 {v5.16b}, [x1], #16 /* reload 1 ct block */
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ld1 {cbciv.16b}, [x1], #16 /* reload 1 ct block */
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eor v2.16b, v2.16b, v6.16b
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eor v3.16b, v3.16b, v7.16b
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eor v4.16b, v4.16b, v5.16b
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#else
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mov v4.16b, v0.16b
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mov v5.16b, v1.16b
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mov v6.16b, v2.16b
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bl aes_decrypt_block4x
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sub x1, x1, #16
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eor v0.16b, v0.16b, cbciv.16b
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eor v1.16b, v1.16b, v4.16b
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ld1 {cbciv.16b}, [x1], #16 /* reload 1 ct block */
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eor v2.16b, v2.16b, v5.16b
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eor v3.16b, v3.16b, v6.16b
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#endif
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st1 {v0.16b-v3.16b}, [x0], #64
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ST5( st1 {v4.16b}, [x0], #16 )
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b .LcbcdecloopNx
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.Lcbcdec1x:
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adds w4, w4, #MAX_STRIDE
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beq .Lcbcdecout
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.Lcbcdecloop:
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ld1 {v1.16b}, [x1], #16 /* get next ct block */
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mov v0.16b, v1.16b /* ...and copy to v0 */
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decrypt_block v0, w3, x2, x6, w7
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eor v0.16b, v0.16b, cbciv.16b /* xor with iv => pt */
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mov cbciv.16b, v1.16b /* ct is next iv */
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st1 {v0.16b}, [x0], #16
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subs w4, w4, #1
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bne .Lcbcdecloop
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.Lcbcdecout:
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st1 {cbciv.16b}, [x5] /* return iv */
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ldp x29, x30, [sp], #16
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ret
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AES_FUNC_END(aes_cbc_decrypt)
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AES_FUNC_END(aes_essiv_cbc_decrypt)
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/*
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* 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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* 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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AES_FUNC_START(aes_cbc_cts_encrypt)
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adr_l x8, .Lcts_permute_table
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sub x4, x4, #16
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add x9, x8, #32
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add x8, x8, x4
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sub x9, x9, x4
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ld1 {v3.16b}, [x8]
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ld1 {v4.16b}, [x9]
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ld1 {v0.16b}, [x1], x4 /* overlapping loads */
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ld1 {v1.16b}, [x1]
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ld1 {v5.16b}, [x5] /* get iv */
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enc_prepare w3, x2, x6
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eor v0.16b, v0.16b, v5.16b /* xor with iv */
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tbl v1.16b, {v1.16b}, v4.16b
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encrypt_block v0, w3, x2, x6, w7
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eor v1.16b, v1.16b, v0.16b
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tbl v0.16b, {v0.16b}, v3.16b
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encrypt_block v1, w3, x2, x6, w7
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add x4, x0, x4
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st1 {v0.16b}, [x4] /* overlapping stores */
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st1 {v1.16b}, [x0]
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ret
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AES_FUNC_END(aes_cbc_cts_encrypt)
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AES_FUNC_START(aes_cbc_cts_decrypt)
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adr_l x8, .Lcts_permute_table
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sub x4, x4, #16
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add x9, x8, #32
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add x8, x8, x4
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sub x9, x9, x4
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ld1 {v3.16b}, [x8]
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ld1 {v4.16b}, [x9]
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ld1 {v0.16b}, [x1], x4 /* overlapping loads */
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ld1 {v1.16b}, [x1]
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ld1 {v5.16b}, [x5] /* get iv */
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dec_prepare w3, x2, x6
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decrypt_block v0, w3, x2, x6, w7
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tbl v2.16b, {v0.16b}, v3.16b
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eor v2.16b, v2.16b, v1.16b
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tbx v0.16b, {v1.16b}, v4.16b
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decrypt_block v0, w3, x2, x6, w7
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eor v0.16b, v0.16b, v5.16b /* xor with iv */
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add x4, x0, x4
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st1 {v2.16b}, [x4] /* overlapping stores */
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st1 {v0.16b}, [x0]
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ret
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AES_FUNC_END(aes_cbc_cts_decrypt)
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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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.previous
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/*
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* aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int bytes, u8 ctr[], u8 finalbuf[])
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*/
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AES_FUNC_START(aes_ctr_encrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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enc_prepare w3, x2, x12
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ld1 {vctr.16b}, [x5]
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umov x12, vctr.d[1] /* keep swabbed ctr in reg */
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rev x12, x12
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.LctrloopNx:
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add w7, w4, #15
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sub w4, w4, #MAX_STRIDE << 4
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lsr w7, w7, #4
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mov w8, #MAX_STRIDE
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cmp w7, w8
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csel w7, w7, w8, lt
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adds x12, x12, x7
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mov v0.16b, vctr.16b
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mov v1.16b, vctr.16b
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mov v2.16b, vctr.16b
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mov v3.16b, vctr.16b
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ST5( mov v4.16b, vctr.16b )
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bcs 0f
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.subsection 1
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/* apply carry to outgoing counter */
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0: umov x8, vctr.d[0]
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rev x8, x8
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add x8, x8, #1
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rev x8, x8
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ins vctr.d[0], x8
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/* apply carry to N counter blocks for N := x12 */
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cbz x12, 2f
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adr x16, 1f
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sub x16, x16, x12, lsl #3
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br x16
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hint 34 // bti c
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mov v0.d[0], vctr.d[0]
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hint 34 // bti c
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mov v1.d[0], vctr.d[0]
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hint 34 // bti c
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mov v2.d[0], vctr.d[0]
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hint 34 // bti c
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mov v3.d[0], vctr.d[0]
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ST5( hint 34 )
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ST5( mov v4.d[0], vctr.d[0] )
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1: b 2f
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.previous
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2: rev x7, x12
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ins vctr.d[1], x7
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sub x7, x12, #MAX_STRIDE - 1
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sub x8, x12, #MAX_STRIDE - 2
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sub x9, x12, #MAX_STRIDE - 3
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rev x7, x7
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rev x8, x8
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mov v1.d[1], x7
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rev x9, x9
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ST5( sub x10, x12, #MAX_STRIDE - 4 )
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mov v2.d[1], x8
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ST5( rev x10, x10 )
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mov v3.d[1], x9
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ST5( mov v4.d[1], x10 )
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tbnz w4, #31, .Lctrtail
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ld1 {v5.16b-v7.16b}, [x1], #48
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ST4( bl aes_encrypt_block4x )
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ST5( bl aes_encrypt_block5x )
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eor v0.16b, v5.16b, v0.16b
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ST4( ld1 {v5.16b}, [x1], #16 )
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eor v1.16b, v6.16b, v1.16b
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ST5( ld1 {v5.16b-v6.16b}, [x1], #32 )
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eor v2.16b, v7.16b, v2.16b
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eor v3.16b, v5.16b, v3.16b
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ST5( eor v4.16b, v6.16b, v4.16b )
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st1 {v0.16b-v3.16b}, [x0], #64
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ST5( st1 {v4.16b}, [x0], #16 )
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cbz w4, .Lctrout
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b .LctrloopNx
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.Lctrout:
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st1 {vctr.16b}, [x5] /* return next CTR value */
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ldp x29, x30, [sp], #16
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ret
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.Lctrtail:
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/* XOR up to MAX_STRIDE * 16 - 1 bytes of in/output with v0 ... v3/v4 */
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mov x16, #16
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ands x13, x4, #0xf
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csel x13, x13, x16, ne
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ST5( cmp w4, #64 - (MAX_STRIDE << 4) )
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ST5( csel x14, x16, xzr, gt )
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cmp w4, #48 - (MAX_STRIDE << 4)
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csel x15, x16, xzr, gt
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cmp w4, #32 - (MAX_STRIDE << 4)
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csel x16, x16, xzr, gt
|
|
cmp w4, #16 - (MAX_STRIDE << 4)
|
|
ble .Lctrtail1x
|
|
|
|
adr_l x12, .Lcts_permute_table
|
|
add x12, x12, x13
|
|
|
|
ST5( ld1 {v5.16b}, [x1], x14 )
|
|
ld1 {v6.16b}, [x1], x15
|
|
ld1 {v7.16b}, [x1], x16
|
|
|
|
ST4( bl aes_encrypt_block4x )
|
|
ST5( bl aes_encrypt_block5x )
|
|
|
|
ld1 {v8.16b}, [x1], x13
|
|
ld1 {v9.16b}, [x1]
|
|
ld1 {v10.16b}, [x12]
|
|
|
|
ST4( eor v6.16b, v6.16b, v0.16b )
|
|
ST4( eor v7.16b, v7.16b, v1.16b )
|
|
ST4( tbl v3.16b, {v3.16b}, v10.16b )
|
|
ST4( eor v8.16b, v8.16b, v2.16b )
|
|
ST4( eor v9.16b, v9.16b, v3.16b )
|
|
|
|
ST5( eor v5.16b, v5.16b, v0.16b )
|
|
ST5( eor v6.16b, v6.16b, v1.16b )
|
|
ST5( tbl v4.16b, {v4.16b}, v10.16b )
|
|
ST5( eor v7.16b, v7.16b, v2.16b )
|
|
ST5( eor v8.16b, v8.16b, v3.16b )
|
|
ST5( eor v9.16b, v9.16b, v4.16b )
|
|
|
|
ST5( st1 {v5.16b}, [x0], x14 )
|
|
st1 {v6.16b}, [x0], x15
|
|
st1 {v7.16b}, [x0], x16
|
|
add x13, x13, x0
|
|
st1 {v9.16b}, [x13] // overlapping stores
|
|
st1 {v8.16b}, [x0]
|
|
b .Lctrout
|
|
|
|
.Lctrtail1x:
|
|
csel x0, x0, x6, eq // use finalbuf if less than a full block
|
|
ld1 {v5.16b}, [x1]
|
|
ST5( mov v3.16b, v4.16b )
|
|
encrypt_block v3, w3, x2, x8, w7
|
|
eor v5.16b, v5.16b, v3.16b
|
|
st1 {v5.16b}, [x0]
|
|
b .Lctrout
|
|
AES_FUNC_END(aes_ctr_encrypt)
|
|
|
|
|
|
/*
|
|
* aes_xts_encrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds,
|
|
* int bytes, u8 const rk2[], u8 iv[], int first)
|
|
* aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds,
|
|
* int bytes, u8 const rk2[], u8 iv[], int first)
|
|
*/
|
|
|
|
.macro next_tweak, out, in, tmp
|
|
sshr \tmp\().2d, \in\().2d, #63
|
|
and \tmp\().16b, \tmp\().16b, xtsmask.16b
|
|
add \out\().2d, \in\().2d, \in\().2d
|
|
ext \tmp\().16b, \tmp\().16b, \tmp\().16b, #8
|
|
eor \out\().16b, \out\().16b, \tmp\().16b
|
|
.endm
|
|
|
|
.macro xts_load_mask, tmp
|
|
movi xtsmask.2s, #0x1
|
|
movi \tmp\().2s, #0x87
|
|
uzp1 xtsmask.4s, xtsmask.4s, \tmp\().4s
|
|
.endm
|
|
|
|
AES_FUNC_START(aes_xts_encrypt)
|
|
stp x29, x30, [sp, #-16]!
|
|
mov x29, sp
|
|
|
|
ld1 {v4.16b}, [x6]
|
|
xts_load_mask v8
|
|
cbz w7, .Lxtsencnotfirst
|
|
|
|
enc_prepare w3, x5, x8
|
|
xts_cts_skip_tw w7, .LxtsencNx
|
|
encrypt_block v4, w3, x5, x8, w7 /* first tweak */
|
|
enc_switch_key w3, x2, x8
|
|
b .LxtsencNx
|
|
|
|
.Lxtsencnotfirst:
|
|
enc_prepare w3, x2, x8
|
|
.LxtsencloopNx:
|
|
next_tweak v4, v4, v8
|
|
.LxtsencNx:
|
|
subs w4, w4, #64
|
|
bmi .Lxtsenc1x
|
|
ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
|
|
next_tweak v5, v4, v8
|
|
eor v0.16b, v0.16b, v4.16b
|
|
next_tweak v6, v5, v8
|
|
eor v1.16b, v1.16b, v5.16b
|
|
eor v2.16b, v2.16b, v6.16b
|
|
next_tweak v7, v6, v8
|
|
eor v3.16b, v3.16b, v7.16b
|
|
bl aes_encrypt_block4x
|
|
eor v3.16b, v3.16b, v7.16b
|
|
eor v0.16b, v0.16b, v4.16b
|
|
eor v1.16b, v1.16b, v5.16b
|
|
eor v2.16b, v2.16b, v6.16b
|
|
st1 {v0.16b-v3.16b}, [x0], #64
|
|
mov v4.16b, v7.16b
|
|
cbz w4, .Lxtsencret
|
|
xts_reload_mask v8
|
|
b .LxtsencloopNx
|
|
.Lxtsenc1x:
|
|
adds w4, w4, #64
|
|
beq .Lxtsencout
|
|
subs w4, w4, #16
|
|
bmi .LxtsencctsNx
|
|
.Lxtsencloop:
|
|
ld1 {v0.16b}, [x1], #16
|
|
.Lxtsencctsout:
|
|
eor v0.16b, v0.16b, v4.16b
|
|
encrypt_block v0, w3, x2, x8, w7
|
|
eor v0.16b, v0.16b, v4.16b
|
|
cbz w4, .Lxtsencout
|
|
subs w4, w4, #16
|
|
next_tweak v4, v4, v8
|
|
bmi .Lxtsenccts
|
|
st1 {v0.16b}, [x0], #16
|
|
b .Lxtsencloop
|
|
.Lxtsencout:
|
|
st1 {v0.16b}, [x0]
|
|
.Lxtsencret:
|
|
st1 {v4.16b}, [x6]
|
|
ldp x29, x30, [sp], #16
|
|
ret
|
|
|
|
.LxtsencctsNx:
|
|
mov v0.16b, v3.16b
|
|
sub x0, x0, #16
|
|
.Lxtsenccts:
|
|
adr_l x8, .Lcts_permute_table
|
|
|
|
add x1, x1, w4, sxtw /* rewind input pointer */
|
|
add w4, w4, #16 /* # bytes in final block */
|
|
add x9, x8, #32
|
|
add x8, x8, x4
|
|
sub x9, x9, x4
|
|
add x4, x0, x4 /* output address of final block */
|
|
|
|
ld1 {v1.16b}, [x1] /* load final block */
|
|
ld1 {v2.16b}, [x8]
|
|
ld1 {v3.16b}, [x9]
|
|
|
|
tbl v2.16b, {v0.16b}, v2.16b
|
|
tbx v0.16b, {v1.16b}, v3.16b
|
|
st1 {v2.16b}, [x4] /* overlapping stores */
|
|
mov w4, wzr
|
|
b .Lxtsencctsout
|
|
AES_FUNC_END(aes_xts_encrypt)
|
|
|
|
AES_FUNC_START(aes_xts_decrypt)
|
|
stp x29, x30, [sp, #-16]!
|
|
mov x29, sp
|
|
|
|
/* subtract 16 bytes if we are doing CTS */
|
|
sub w8, w4, #0x10
|
|
tst w4, #0xf
|
|
csel w4, w4, w8, eq
|
|
|
|
ld1 {v4.16b}, [x6]
|
|
xts_load_mask v8
|
|
xts_cts_skip_tw w7, .Lxtsdecskiptw
|
|
cbz w7, .Lxtsdecnotfirst
|
|
|
|
enc_prepare w3, x5, x8
|
|
encrypt_block v4, w3, x5, x8, w7 /* first tweak */
|
|
.Lxtsdecskiptw:
|
|
dec_prepare w3, x2, x8
|
|
b .LxtsdecNx
|
|
|
|
.Lxtsdecnotfirst:
|
|
dec_prepare w3, x2, x8
|
|
.LxtsdecloopNx:
|
|
next_tweak v4, v4, v8
|
|
.LxtsdecNx:
|
|
subs w4, w4, #64
|
|
bmi .Lxtsdec1x
|
|
ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
|
|
next_tweak v5, v4, v8
|
|
eor v0.16b, v0.16b, v4.16b
|
|
next_tweak v6, v5, v8
|
|
eor v1.16b, v1.16b, v5.16b
|
|
eor v2.16b, v2.16b, v6.16b
|
|
next_tweak v7, v6, v8
|
|
eor v3.16b, v3.16b, v7.16b
|
|
bl aes_decrypt_block4x
|
|
eor v3.16b, v3.16b, v7.16b
|
|
eor v0.16b, v0.16b, v4.16b
|
|
eor v1.16b, v1.16b, v5.16b
|
|
eor v2.16b, v2.16b, v6.16b
|
|
st1 {v0.16b-v3.16b}, [x0], #64
|
|
mov v4.16b, v7.16b
|
|
cbz w4, .Lxtsdecout
|
|
xts_reload_mask v8
|
|
b .LxtsdecloopNx
|
|
.Lxtsdec1x:
|
|
adds w4, w4, #64
|
|
beq .Lxtsdecout
|
|
subs w4, w4, #16
|
|
.Lxtsdecloop:
|
|
ld1 {v0.16b}, [x1], #16
|
|
bmi .Lxtsdeccts
|
|
.Lxtsdecctsout:
|
|
eor v0.16b, v0.16b, v4.16b
|
|
decrypt_block v0, w3, x2, x8, w7
|
|
eor v0.16b, v0.16b, v4.16b
|
|
st1 {v0.16b}, [x0], #16
|
|
cbz w4, .Lxtsdecout
|
|
subs w4, w4, #16
|
|
next_tweak v4, v4, v8
|
|
b .Lxtsdecloop
|
|
.Lxtsdecout:
|
|
st1 {v4.16b}, [x6]
|
|
ldp x29, x30, [sp], #16
|
|
ret
|
|
|
|
.Lxtsdeccts:
|
|
adr_l x8, .Lcts_permute_table
|
|
|
|
add x1, x1, w4, sxtw /* rewind input pointer */
|
|
add w4, w4, #16 /* # bytes in final block */
|
|
add x9, x8, #32
|
|
add x8, x8, x4
|
|
sub x9, x9, x4
|
|
add x4, x0, x4 /* output address of final block */
|
|
|
|
next_tweak v5, v4, v8
|
|
|
|
ld1 {v1.16b}, [x1] /* load final block */
|
|
ld1 {v2.16b}, [x8]
|
|
ld1 {v3.16b}, [x9]
|
|
|
|
eor v0.16b, v0.16b, v5.16b
|
|
decrypt_block v0, w3, x2, x8, w7
|
|
eor v0.16b, v0.16b, v5.16b
|
|
|
|
tbl v2.16b, {v0.16b}, v2.16b
|
|
tbx v0.16b, {v1.16b}, v3.16b
|
|
|
|
st1 {v2.16b}, [x4] /* overlapping stores */
|
|
mov w4, wzr
|
|
b .Lxtsdecctsout
|
|
AES_FUNC_END(aes_xts_decrypt)
|
|
|
|
/*
|
|
* aes_mac_update(u8 const in[], u32 const rk[], int rounds,
|
|
* int blocks, u8 dg[], int enc_before, int enc_after)
|
|
*/
|
|
AES_FUNC_START(aes_mac_update)
|
|
ld1 {v0.16b}, [x4] /* get dg */
|
|
enc_prepare w2, x1, x7
|
|
cbz w5, .Lmacloop4x
|
|
|
|
encrypt_block v0, w2, x1, x7, w8
|
|
|
|
.Lmacloop4x:
|
|
subs w3, w3, #4
|
|
bmi .Lmac1x
|
|
ld1 {v1.16b-v4.16b}, [x0], #64 /* get next pt block */
|
|
eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
|
|
encrypt_block v0, w2, x1, x7, w8
|
|
eor v0.16b, v0.16b, v2.16b
|
|
encrypt_block v0, w2, x1, x7, w8
|
|
eor v0.16b, v0.16b, v3.16b
|
|
encrypt_block v0, w2, x1, x7, w8
|
|
eor v0.16b, v0.16b, v4.16b
|
|
cmp w3, wzr
|
|
csinv x5, x6, xzr, eq
|
|
cbz w5, .Lmacout
|
|
encrypt_block v0, w2, x1, x7, w8
|
|
st1 {v0.16b}, [x4] /* return dg */
|
|
cond_yield .Lmacout, x7, x8
|
|
b .Lmacloop4x
|
|
.Lmac1x:
|
|
add w3, w3, #4
|
|
.Lmacloop:
|
|
cbz w3, .Lmacout
|
|
ld1 {v1.16b}, [x0], #16 /* get next pt block */
|
|
eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
|
|
|
|
subs w3, w3, #1
|
|
csinv x5, x6, xzr, eq
|
|
cbz w5, .Lmacout
|
|
|
|
.Lmacenc:
|
|
encrypt_block v0, w2, x1, x7, w8
|
|
b .Lmacloop
|
|
|
|
.Lmacout:
|
|
st1 {v0.16b}, [x4] /* return dg */
|
|
mov w0, w3
|
|
ret
|
|
AES_FUNC_END(aes_mac_update)
|