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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
| add w7, w6, #1
| mov v0.16b, v4.16b
| add w8, w6, #2
| mov v1.16b, v4.16b
| add w9, w6, #3
| mov v2.16b, v4.16b
| rev w7, w7
| mov v3.16b, v4.16b
| rev w8, w8
| mov v1.s[3], w7
| rev w9, w9
| mov v2.s[3], w8
| mov v3.s[3], w9
| 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], #16 /* get 1 input block */
| eor v1.16b, v6.16b, v1.16b
| eor v2.16b, v7.16b, v2.16b
| eor v3.16b, v5.16b, v3.16b
| st1 {v0.16b-v3.16b}, [x19], #64
| add x6, x6, #4
| rev x7, x6
| ins v4.d[1], x7
| cbz w23, .Lctrout
| st1 {v4.16b}, [x24] /* return next CTR value */
| cond_yield_neon .Lctrrestart
| b .LctrloopNx
| .Lctr1x:
| adds w23, w23, #4
| beq .Lctrout
| .Lctrloop:
| mov v0.16b, v4.16b
| encrypt_block v0, w22, x21, x8, w7
|
| adds x6, x6, #1 /* increment BE ctr */
| rev x7, x6
| ins v4.d[1], x7
| bcs .Lctrcarry /* overflow? */
|
| .Lctrcarrydone:
| subs w23, w23, #1
| bmi .Lctrtailblock /* blocks <0 means tail block */
| ld1 {v3.16b}, [x20], #16
| eor v3.16b, v0.16b, v3.16b
| st1 {v3.16b}, [x19], #16
| bne .Lctrloop
|
| .Lctrout:
| st1 {v4.16b}, [x24] /* return next CTR value */
| .Lctrret:
| frame_pop
| ret
|
| .Lctrtailblock:
| st1 {v0.16b}, [x19]
| b .Lctrret
|
| .Lctrcarry:
| umov x7, v4.d[0] /* load upper word of ctr */
| rev x7, x7 /* ... to handle the carry */
| add x7, x7, #1
| rev x7, x7
| ins v4.d[0], x7
| b .Lctrcarrydone
| AES_ENDPROC(aes_ctr_encrypt)
| .ltorg
|
|
| /*
| * aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds,
| * int blocks, u8 const rk2[], u8 iv[], int first)
| * aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds,
| * int blocks, u8 const rk2[], u8 iv[], int first)
| */
|
| .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
|
| .Lxts_mul_x:
| CPU_LE( .quad 1, 0x87 )
| CPU_BE( .quad 0x87, 1 )
|
| AES_ENTRY(aes_xts_encrypt)
| frame_push 6
|
| mov x19, x0
| mov x20, x1
| mov x21, x2
| mov x22, x3
| mov x23, x4
| mov x24, x6
|
| ld1 {v4.16b}, [x24]
| cbz w7, .Lxtsencnotfirst
|
| enc_prepare w3, x5, x8
| encrypt_block v4, w3, x5, x8, w7 /* first tweak */
| enc_switch_key w3, x2, x8
| ldr q7, .Lxts_mul_x
| b .LxtsencNx
|
| .Lxtsencrestart:
| ld1 {v4.16b}, [x24]
| .Lxtsencnotfirst:
| enc_prepare w22, x21, x8
| .LxtsencloopNx:
| ldr q7, .Lxts_mul_x
| next_tweak v4, v4, v7, v8
| .LxtsencNx:
| subs w23, w23, #4
| bmi .Lxtsenc1x
| ld1 {v0.16b-v3.16b}, [x20], #64 /* get 4 pt blocks */
| next_tweak v5, v4, v7, v8
| eor v0.16b, v0.16b, v4.16b
| next_tweak v6, v5, v7, v8
| eor v1.16b, v1.16b, v5.16b
| eor v2.16b, v2.16b, v6.16b
| next_tweak v7, v6, v7, 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}, [x19], #64
| mov v4.16b, v7.16b
| cbz w23, .Lxtsencout
| st1 {v4.16b}, [x24]
| cond_yield_neon .Lxtsencrestart
| b .LxtsencloopNx
| .Lxtsenc1x:
| adds w23, w23, #4
| beq .Lxtsencout
| .Lxtsencloop:
| ld1 {v1.16b}, [x20], #16
| eor v0.16b, v1.16b, v4.16b
| encrypt_block v0, w22, x21, x8, w7
| eor v0.16b, v0.16b, v4.16b
| st1 {v0.16b}, [x19], #16
| subs w23, w23, #1
| beq .Lxtsencout
| next_tweak v4, v4, v7, v8
| b .Lxtsencloop
| .Lxtsencout:
| st1 {v4.16b}, [x24]
| frame_pop
| ret
| AES_ENDPROC(aes_xts_encrypt)
|
|
| AES_ENTRY(aes_xts_decrypt)
| frame_push 6
|
| mov x19, x0
| mov x20, x1
| mov x21, x2
| mov x22, x3
| mov x23, x4
| mov x24, x6
|
| ld1 {v4.16b}, [x24]
| cbz w7, .Lxtsdecnotfirst
|
| enc_prepare w3, x5, x8
| encrypt_block v4, w3, x5, x8, w7 /* first tweak */
| dec_prepare w3, x2, x8
| ldr q7, .Lxts_mul_x
| b .LxtsdecNx
|
| .Lxtsdecrestart:
| ld1 {v4.16b}, [x24]
| .Lxtsdecnotfirst:
| dec_prepare w22, x21, x8
| .LxtsdecloopNx:
| ldr q7, .Lxts_mul_x
| next_tweak v4, v4, v7, v8
| .LxtsdecNx:
| subs w23, w23, #4
| bmi .Lxtsdec1x
| ld1 {v0.16b-v3.16b}, [x20], #64 /* get 4 ct blocks */
| next_tweak v5, v4, v7, v8
| eor v0.16b, v0.16b, v4.16b
| next_tweak v6, v5, v7, v8
| eor v1.16b, v1.16b, v5.16b
| eor v2.16b, v2.16b, v6.16b
| next_tweak v7, v6, v7, 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}, [x19], #64
| mov v4.16b, v7.16b
| cbz w23, .Lxtsdecout
| st1 {v4.16b}, [x24]
| cond_yield_neon .Lxtsdecrestart
| b .LxtsdecloopNx
| .Lxtsdec1x:
| adds w23, w23, #4
| beq .Lxtsdecout
| .Lxtsdecloop:
| ld1 {v1.16b}, [x20], #16
| eor v0.16b, v1.16b, v4.16b
| decrypt_block v0, w22, x21, x8, w7
| eor v0.16b, v0.16b, v4.16b
| st1 {v0.16b}, [x19], #16
| subs w23, w23, #1
| beq .Lxtsdecout
| next_tweak v4, v4, v7, v8
| b .Lxtsdecloop
| .Lxtsdecout:
| st1 {v4.16b}, [x24]
| frame_pop
| ret
| AES_ENDPROC(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_ENTRY(aes_mac_update)
| frame_push 6
|
| mov x19, x0
| mov x20, x1
| mov x21, x2
| mov x22, x3
| mov x23, x4
| mov x24, x6
|
| ld1 {v0.16b}, [x23] /* get dg */
| enc_prepare w2, x1, x7
| cbz w5, .Lmacloop4x
|
| encrypt_block v0, w2, x1, x7, w8
|
| .Lmacloop4x:
| subs w22, w22, #4
| bmi .Lmac1x
| ld1 {v1.16b-v4.16b}, [x19], #64 /* get next pt block */
| eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
| encrypt_block v0, w21, x20, x7, w8
| eor v0.16b, v0.16b, v2.16b
| encrypt_block v0, w21, x20, x7, w8
| eor v0.16b, v0.16b, v3.16b
| encrypt_block v0, w21, x20, x7, w8
| eor v0.16b, v0.16b, v4.16b
| cmp w22, wzr
| csinv x5, x24, xzr, eq
| cbz w5, .Lmacout
| encrypt_block v0, w21, x20, x7, w8
| st1 {v0.16b}, [x23] /* return dg */
| cond_yield_neon .Lmacrestart
| b .Lmacloop4x
| .Lmac1x:
| add w22, w22, #4
| .Lmacloop:
| cbz w22, .Lmacout
| ld1 {v1.16b}, [x19], #16 /* get next pt block */
| eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
|
| subs w22, w22, #1
| csinv x5, x24, xzr, eq
| cbz w5, .Lmacout
|
| .Lmacenc:
| encrypt_block v0, w21, x20, x7, w8
| b .Lmacloop
|
| .Lmacout:
| st1 {v0.16b}, [x23] /* return dg */
| frame_pop
| ret
|
| .Lmacrestart:
| ld1 {v0.16b}, [x23] /* get dg */
| enc_prepare w21, x20, x0
| b .Lmacloop4x
| AES_ENDPROC(aes_mac_update)
|
|
