| /* |
| * 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 |
| |
| /* |
| * There are several ways to instantiate this code: |
| * - no interleave, all inline |
| * - 2-way interleave, 2x calls out of line (-DINTERLEAVE=2) |
| * - 2-way interleave, all inline (-DINTERLEAVE=2 -DINTERLEAVE_INLINE) |
| * - 4-way interleave, 4x calls out of line (-DINTERLEAVE=4) |
| * - 4-way interleave, all inline (-DINTERLEAVE=4 -DINTERLEAVE_INLINE) |
| * |
| * Macros imported by this code: |
| * - enc_prepare - setup NEON registers for encryption |
| * - dec_prepare - setup NEON registers for decryption |
| * - enc_switch_key - change to new key after having prepared for encryption |
| * - encrypt_block - encrypt a single block |
| * - decrypt block - decrypt a single block |
| * - encrypt_block2x - encrypt 2 blocks in parallel (if INTERLEAVE == 2) |
| * - decrypt_block2x - decrypt 2 blocks in parallel (if INTERLEAVE == 2) |
| * - encrypt_block4x - encrypt 4 blocks in parallel (if INTERLEAVE == 4) |
| * - decrypt_block4x - decrypt 4 blocks in parallel (if INTERLEAVE == 4) |
| */ |
| |
| #if defined(INTERLEAVE) && !defined(INTERLEAVE_INLINE) |
| #define FRAME_PUSH stp x29, x30, [sp,#-16]! ; mov x29, sp |
| #define FRAME_POP ldp x29, x30, [sp],#16 |
| |
| #if INTERLEAVE == 2 |
| |
| aes_encrypt_block2x: |
| encrypt_block2x v0, v1, w3, x2, x6, w7 |
| ret |
| ENDPROC(aes_encrypt_block2x) |
| |
| aes_decrypt_block2x: |
| decrypt_block2x v0, v1, w3, x2, x6, w7 |
| ret |
| ENDPROC(aes_decrypt_block2x) |
| |
| #elif INTERLEAVE == 4 |
| |
| aes_encrypt_block4x: |
| encrypt_block4x v0, v1, v2, v3, w3, x2, x6, w7 |
| ret |
| ENDPROC(aes_encrypt_block4x) |
| |
| aes_decrypt_block4x: |
| decrypt_block4x v0, v1, v2, v3, w3, x2, x6, w7 |
| ret |
| ENDPROC(aes_decrypt_block4x) |
| |
| #else |
| #error INTERLEAVE should equal 2 or 4 |
| #endif |
| |
| .macro do_encrypt_block2x |
| bl aes_encrypt_block2x |
| .endm |
| |
| .macro do_decrypt_block2x |
| bl aes_decrypt_block2x |
| .endm |
| |
| .macro do_encrypt_block4x |
| bl aes_encrypt_block4x |
| .endm |
| |
| .macro do_decrypt_block4x |
| bl aes_decrypt_block4x |
| .endm |
| |
| #else |
| #define FRAME_PUSH |
| #define FRAME_POP |
| |
| .macro do_encrypt_block2x |
| encrypt_block2x v0, v1, w3, x2, x6, w7 |
| .endm |
| |
| .macro do_decrypt_block2x |
| decrypt_block2x v0, v1, w3, x2, x6, w7 |
| .endm |
| |
| .macro do_encrypt_block4x |
| encrypt_block4x v0, v1, v2, v3, w3, x2, x6, w7 |
| .endm |
| |
| .macro do_decrypt_block4x |
| decrypt_block4x v0, v1, v2, v3, w3, x2, x6, w7 |
| .endm |
| |
| #endif |
| |
| /* |
| * aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, |
| * int blocks, int first) |
| * aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, |
| * int blocks, int first) |
| */ |
| |
| AES_ENTRY(aes_ecb_encrypt) |
| FRAME_PUSH |
| cbz w5, .LecbencloopNx |
| |
| enc_prepare w3, x2, x5 |
| |
| .LecbencloopNx: |
| #if INTERLEAVE >= 2 |
| subs w4, w4, #INTERLEAVE |
| bmi .Lecbenc1x |
| #if INTERLEAVE == 2 |
| ld1 {v0.16b-v1.16b}, [x1], #32 /* get 2 pt blocks */ |
| do_encrypt_block2x |
| st1 {v0.16b-v1.16b}, [x0], #32 |
| #else |
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */ |
| do_encrypt_block4x |
| st1 {v0.16b-v3.16b}, [x0], #64 |
| #endif |
| b .LecbencloopNx |
| .Lecbenc1x: |
| adds w4, w4, #INTERLEAVE |
| beq .Lecbencout |
| #endif |
| .Lecbencloop: |
| ld1 {v0.16b}, [x1], #16 /* get next pt block */ |
| encrypt_block v0, w3, x2, x5, w6 |
| st1 {v0.16b}, [x0], #16 |
| subs w4, w4, #1 |
| bne .Lecbencloop |
| .Lecbencout: |
| FRAME_POP |
| ret |
| AES_ENDPROC(aes_ecb_encrypt) |
| |
| |
| AES_ENTRY(aes_ecb_decrypt) |
| FRAME_PUSH |
| cbz w5, .LecbdecloopNx |
| |
| dec_prepare w3, x2, x5 |
| |
| .LecbdecloopNx: |
| #if INTERLEAVE >= 2 |
| subs w4, w4, #INTERLEAVE |
| bmi .Lecbdec1x |
| #if INTERLEAVE == 2 |
| ld1 {v0.16b-v1.16b}, [x1], #32 /* get 2 ct blocks */ |
| do_decrypt_block2x |
| st1 {v0.16b-v1.16b}, [x0], #32 |
| #else |
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */ |
| do_decrypt_block4x |
| st1 {v0.16b-v3.16b}, [x0], #64 |
| #endif |
| b .LecbdecloopNx |
| .Lecbdec1x: |
| adds w4, w4, #INTERLEAVE |
| beq .Lecbdecout |
| #endif |
| .Lecbdecloop: |
| ld1 {v0.16b}, [x1], #16 /* get next ct block */ |
| decrypt_block v0, w3, x2, x5, w6 |
| st1 {v0.16b}, [x0], #16 |
| subs w4, w4, #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[], int first) |
| * aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, |
| * int blocks, u8 iv[], int first) |
| */ |
| |
| AES_ENTRY(aes_cbc_encrypt) |
| cbz w6, .Lcbcencloop |
| |
| ld1 {v0.16b}, [x5] /* get iv */ |
| enc_prepare w3, x2, x6 |
| |
| .Lcbcencloop: |
| ld1 {v1.16b}, [x1], #16 /* get next pt block */ |
| eor v0.16b, v0.16b, v1.16b /* ..and xor with iv */ |
| encrypt_block v0, w3, x2, x6, w7 |
| st1 {v0.16b}, [x0], #16 |
| subs w4, w4, #1 |
| bne .Lcbcencloop |
| st1 {v0.16b}, [x5] /* return iv */ |
| ret |
| AES_ENDPROC(aes_cbc_encrypt) |
| |
| |
| AES_ENTRY(aes_cbc_decrypt) |
| FRAME_PUSH |
| cbz w6, .LcbcdecloopNx |
| |
| ld1 {v7.16b}, [x5] /* get iv */ |
| dec_prepare w3, x2, x6 |
| |
| .LcbcdecloopNx: |
| #if INTERLEAVE >= 2 |
| subs w4, w4, #INTERLEAVE |
| bmi .Lcbcdec1x |
| #if INTERLEAVE == 2 |
| ld1 {v0.16b-v1.16b}, [x1], #32 /* get 2 ct blocks */ |
| mov v2.16b, v0.16b |
| mov v3.16b, v1.16b |
| do_decrypt_block2x |
| eor v0.16b, v0.16b, v7.16b |
| eor v1.16b, v1.16b, v2.16b |
| mov v7.16b, v3.16b |
| st1 {v0.16b-v1.16b}, [x0], #32 |
| #else |
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */ |
| mov v4.16b, v0.16b |
| mov v5.16b, v1.16b |
| mov v6.16b, v2.16b |
| do_decrypt_block4x |
| sub x1, x1, #16 |
| eor v0.16b, v0.16b, v7.16b |
| eor v1.16b, v1.16b, v4.16b |
| ld1 {v7.16b}, [x1], #16 /* reload 1 ct block */ |
| eor v2.16b, v2.16b, v5.16b |
| eor v3.16b, v3.16b, v6.16b |
| st1 {v0.16b-v3.16b}, [x0], #64 |
| #endif |
| b .LcbcdecloopNx |
| .Lcbcdec1x: |
| adds w4, w4, #INTERLEAVE |
| beq .Lcbcdecout |
| #endif |
| .Lcbcdecloop: |
| ld1 {v1.16b}, [x1], #16 /* get next ct block */ |
| mov v0.16b, v1.16b /* ...and copy to v0 */ |
| decrypt_block v0, w3, x2, 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}, [x0], #16 |
| subs w4, w4, #1 |
| bne .Lcbcdecloop |
| .Lcbcdecout: |
| FRAME_POP |
| st1 {v7.16b}, [x5] /* return iv */ |
| ret |
| AES_ENDPROC(aes_cbc_decrypt) |
| |
| |
| /* |
| * aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds, |
| * int blocks, u8 ctr[], int first) |
| */ |
| |
| AES_ENTRY(aes_ctr_encrypt) |
| FRAME_PUSH |
| cbz w6, .Lctrnotfirst /* 1st time around? */ |
| enc_prepare w3, x2, x6 |
| ld1 {v4.16b}, [x5] |
| |
| .Lctrnotfirst: |
| umov x8, v4.d[1] /* keep swabbed ctr in reg */ |
| rev x8, x8 |
| #if INTERLEAVE >= 2 |
| cmn w8, w4 /* 32 bit overflow? */ |
| bcs .Lctrloop |
| .LctrloopNx: |
| subs w4, w4, #INTERLEAVE |
| bmi .Lctr1x |
| #if INTERLEAVE == 2 |
| mov v0.8b, v4.8b |
| mov v1.8b, v4.8b |
| rev x7, x8 |
| add x8, x8, #1 |
| ins v0.d[1], x7 |
| rev x7, x8 |
| add x8, x8, #1 |
| ins v1.d[1], x7 |
| ld1 {v2.16b-v3.16b}, [x1], #32 /* get 2 input blocks */ |
| do_encrypt_block2x |
| eor v0.16b, v0.16b, v2.16b |
| eor v1.16b, v1.16b, v3.16b |
| st1 {v0.16b-v1.16b}, [x0], #32 |
| #else |
| ldr q8, =0x30000000200000001 /* addends 1,2,3[,0] */ |
| dup v7.4s, w8 |
| 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}, [x1], #48 /* get 3 input blocks */ |
| do_encrypt_block4x |
| eor v0.16b, v5.16b, v0.16b |
| ld1 {v5.16b}, [x1], #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}, [x0], #64 |
| add x8, x8, #INTERLEAVE |
| #endif |
| rev x7, x8 |
| ins v4.d[1], x7 |
| cbz w4, .Lctrout |
| b .LctrloopNx |
| .Lctr1x: |
| adds w4, w4, #INTERLEAVE |
| beq .Lctrout |
| #endif |
| .Lctrloop: |
| mov v0.16b, v4.16b |
| encrypt_block v0, w3, x2, x6, w7 |
| |
| adds x8, x8, #1 /* increment BE ctr */ |
| rev x7, x8 |
| ins v4.d[1], x7 |
| bcs .Lctrcarry /* overflow? */ |
| |
| .Lctrcarrydone: |
| subs w4, w4, #1 |
| bmi .Lctrtailblock /* blocks <0 means tail block */ |
| ld1 {v3.16b}, [x1], #16 |
| eor v3.16b, v0.16b, v3.16b |
| st1 {v3.16b}, [x0], #16 |
| bne .Lctrloop |
| |
| .Lctrout: |
| st1 {v4.16b}, [x5] /* return next CTR value */ |
| FRAME_POP |
| ret |
| |
| .Lctrtailblock: |
| st1 {v0.16b}, [x0] |
| FRAME_POP |
| ret |
| |
| .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 |
| cbz w7, .LxtsencloopNx |
| |
| ld1 {v4.16b}, [x6] |
| enc_prepare w3, x5, x6 |
| encrypt_block v4, w3, x5, x6, w7 /* first tweak */ |
| enc_switch_key w3, x2, x6 |
| ldr q7, .Lxts_mul_x |
| b .LxtsencNx |
| |
| .LxtsencloopNx: |
| ldr q7, .Lxts_mul_x |
| next_tweak v4, v4, v7, v8 |
| .LxtsencNx: |
| #if INTERLEAVE >= 2 |
| subs w4, w4, #INTERLEAVE |
| bmi .Lxtsenc1x |
| #if INTERLEAVE == 2 |
| ld1 {v0.16b-v1.16b}, [x1], #32 /* get 2 pt blocks */ |
| next_tweak v5, v4, v7, v8 |
| eor v0.16b, v0.16b, v4.16b |
| eor v1.16b, v1.16b, v5.16b |
| do_encrypt_block2x |
| eor v0.16b, v0.16b, v4.16b |
| eor v1.16b, v1.16b, v5.16b |
| st1 {v0.16b-v1.16b}, [x0], #32 |
| cbz w4, .LxtsencoutNx |
| next_tweak v4, v5, v7, v8 |
| b .LxtsencNx |
| .LxtsencoutNx: |
| mov v4.16b, v5.16b |
| b .Lxtsencout |
| #else |
| ld1 {v0.16b-v3.16b}, [x1], #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 |
| do_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, .Lxtsencout |
| b .LxtsencloopNx |
| #endif |
| .Lxtsenc1x: |
| adds w4, w4, #INTERLEAVE |
| beq .Lxtsencout |
| #endif |
| .Lxtsencloop: |
| ld1 {v1.16b}, [x1], #16 |
| eor v0.16b, v1.16b, v4.16b |
| encrypt_block v0, w3, x2, x6, w7 |
| eor v0.16b, v0.16b, v4.16b |
| st1 {v0.16b}, [x0], #16 |
| subs w4, w4, #1 |
| beq .Lxtsencout |
| next_tweak v4, v4, v7, v8 |
| b .Lxtsencloop |
| .Lxtsencout: |
| FRAME_POP |
| ret |
| AES_ENDPROC(aes_xts_encrypt) |
| |
| |
| AES_ENTRY(aes_xts_decrypt) |
| FRAME_PUSH |
| cbz w7, .LxtsdecloopNx |
| |
| ld1 {v4.16b}, [x6] |
| enc_prepare w3, x5, x6 |
| encrypt_block v4, w3, x5, x6, w7 /* first tweak */ |
| dec_prepare w3, x2, x6 |
| ldr q7, .Lxts_mul_x |
| b .LxtsdecNx |
| |
| .LxtsdecloopNx: |
| ldr q7, .Lxts_mul_x |
| next_tweak v4, v4, v7, v8 |
| .LxtsdecNx: |
| #if INTERLEAVE >= 2 |
| subs w4, w4, #INTERLEAVE |
| bmi .Lxtsdec1x |
| #if INTERLEAVE == 2 |
| ld1 {v0.16b-v1.16b}, [x1], #32 /* get 2 ct blocks */ |
| next_tweak v5, v4, v7, v8 |
| eor v0.16b, v0.16b, v4.16b |
| eor v1.16b, v1.16b, v5.16b |
| do_decrypt_block2x |
| eor v0.16b, v0.16b, v4.16b |
| eor v1.16b, v1.16b, v5.16b |
| st1 {v0.16b-v1.16b}, [x0], #32 |
| cbz w4, .LxtsdecoutNx |
| next_tweak v4, v5, v7, v8 |
| b .LxtsdecNx |
| .LxtsdecoutNx: |
| mov v4.16b, v5.16b |
| b .Lxtsdecout |
| #else |
| ld1 {v0.16b-v3.16b}, [x1], #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 |
| do_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 |
| b .LxtsdecloopNx |
| #endif |
| .Lxtsdec1x: |
| adds w4, w4, #INTERLEAVE |
| beq .Lxtsdecout |
| #endif |
| .Lxtsdecloop: |
| ld1 {v1.16b}, [x1], #16 |
| eor v0.16b, v1.16b, v4.16b |
| decrypt_block v0, w3, x2, x6, w7 |
| eor v0.16b, v0.16b, v4.16b |
| st1 {v0.16b}, [x0], #16 |
| subs w4, w4, #1 |
| beq .Lxtsdecout |
| next_tweak v4, v4, v7, v8 |
| b .Lxtsdecloop |
| .Lxtsdecout: |
| 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) |
| ld1 {v0.16b}, [x4] /* get dg */ |
| enc_prepare w2, x1, x7 |
| cbnz w5, .Lmacenc |
| |
| .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 */ |
| ret |
| AES_ENDPROC(aes_mac_update) |
