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aes_gcm_amd64.s
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aes_gcm_amd64.s
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// Copyright (c) 2018 Andreas Auernhammer. All rights reserved.
// Use of this source code is governed by a license that can be
// found in the LICENSE file.
// +build amd64,!gccgo,!appengine
#include "textflag.h"
#include "aes_macros_amd64.s"
DATA ·one<>+0x00(SB)/8, $1
DATA ·one<>+0x08(SB)/8, $0
GLOBL ·one<>(SB), (NOPTR+RODATA), $16
DATA ·polyvalMask<>+0x00(SB)/8, $0x0000000000000001
DATA ·polyvalMask<>+0x08(SB)/8, $0xc200000000000000
GLOBL ·polyvalMask<>(SB), (NOPTR+RODATA), $16
// func aesGcmXORKeyStream(dst, src, iv, keys []byte, keyLen uint64)
TEXT ·aesGcmXORKeyStream(SB), 4, $0-104
MOVQ dst+0(FP), DI
MOVQ src+24(FP), SI
MOVQ src_len+32(FP), DX
MOVQ iv+48(FP), BX
MOVQ keys+72(FP), AX
MOVQ keyLen+96(FP), CX
TESTQ DX, DX
JZ return
MOVUPS (0 * 16)(BX), X10
MOVUPS ·one<>(SB), X9
CMPQ DX, $64
JB loop_1
CMPQ DX, $128
JB loop_4
loop_8:
MOVAPS X10, X0
PADDD X9, X10
MOVAPS X10, X1
PADDD X9, X10
MOVAPS X10, X2
PADDD X9, X10
MOVAPS X10, X3
PADDD X9, X10
MOVAPS X10, X4
PADDD X9, X10
MOVAPS X10, X5
PADDD X9, X10
MOVAPS X10, X6
PADDD X9, X10
MOVAPS X10, X7
PADDD X9, X10
CMPQ CX, $16
JE aes_128_8
aes_256_8:
AES_256_8(X0, X1, X2, X3, X4, X5, X6, X7, X8, AX)
JMP xor_8
aes_128_8:
AES_128_8(X0, X1, X2, X3, X4, X5, X6, X7, X8, AX)
xor_8:
PXOR (0 * 16)(SI), X0
PXOR (1 * 16)(SI), X1
PXOR (2 * 16)(SI), X2
PXOR (3 * 16)(SI), X3
PXOR (4 * 16)(SI), X4
PXOR (5 * 16)(SI), X5
PXOR (6 * 16)(SI), X6
PXOR (7 * 16)(SI), X7
MOVUPS X0, (0 * 16)(DI)
MOVUPS X1, (1 * 16)(DI)
MOVUPS X2, (2 * 16)(DI)
MOVUPS X3, (3 * 16)(DI)
MOVUPS X4, (4 * 16)(DI)
MOVUPS X5, (5 * 16)(DI)
MOVUPS X6, (6 * 16)(DI)
MOVUPS X7, (7 * 16)(DI)
ADDQ $128, SI
ADDQ $128, DI
SUBQ $128, DX
CMPQ DX, $128
JAE loop_8
TESTQ DX, DX
JZ return
CMPQ DX, $64
JB loop_1
loop_4:
MOVAPS X10, X0
PADDD X9, X10
MOVAPS X10, X1
PADDD X9, X10
MOVAPS X10, X2
PADDD X9, X10
MOVAPS X10, X3
PADDD X9, X10
CMPQ CX, $16
JE aes_128_4
aes_256_4:
AES_256_4(X0, X1, X2, X3, X4, AX)
JMP xor_4
aes_128_4:
AES_128_4(X0, X1, X2, X3, X4, AX)
xor_4:
PXOR (0 * 16)(SI), X0
PXOR (1 * 16)(SI), X1
PXOR (2 * 16)(SI), X2
PXOR (3 * 16)(SI), X3
MOVUPS X0, (0 * 16)(DI)
MOVUPS X1, (1 * 16)(DI)
MOVUPS X2, (2 * 16)(DI)
MOVUPS X3, (3 * 16)(DI)
ADDQ $64, SI
ADDQ $64, DI
SUBQ $64, DX
CMPQ DX, $64
JAE loop_4
TESTQ DX, DX
JZ return
loop_1:
MOVAPS X10, X0
PADDD X9, X10
CMPQ CX, $16
JE aes_128_1
aes_256_1:
AES_256(X0, X1, AX)
JMP xor_1
aes_128_1:
AES_128(X0, X1, AX)
xor_1:
CMPQ DX, $16
JB finalize
PXOR 0(SI), X0
MOVUPS X0, 0(DI)
ADDQ $16, SI
ADDQ $16, DI
SUBQ $16, DX
JMP loop_1
finalize:
TESTQ DX, DX
JZ return
finalize_loop:
MOVQ X0, R10
PSRLDQ $1, X0
MOVB 0(SI), R11
XORQ R11, R10
MOVB R10, 0(DI)
INCQ SI
INCQ DI
DECQ DX
JNZ finalize_loop
return:
RET
// func polyval(tag *[16]byte, additionalData, plaintext, key []byte)
TEXT ·polyval(SB), $0-64
MOVQ tag+0(FP), DI
MOVQ additionalData+8(FP), SI
MOVQ additionalData_len+16(FP), DX
MOVQ plaintext+32(FP), BX
MOVQ plaintext_len+40(FP), CX
MOVQ key+56(FP), AX
MOVQ DX, R14
MOVQ CX, R15
SHLQ $3, R14
SHLQ $3, R15
MOVOU 0(DI), X0
MOVOU 0(AX), X1
MOVOU ·polyvalMask<>(SB), X2
MOVQ $2, AX
loop:
CMPQ DX, $16
JB finalize
MOVUPS 0(SI), X7
PXOR X7, X0
MULTIPLY(X0, X1, X2, X3, X4, X5, X6)
ADDQ $16, SI
SUBQ $16, DX
JMP loop
finalize:
TESTQ DX, DX
JZ process_next
MOVQ DI, R11
PXOR X3, X3
MOVOU X3, 0(R11)
finalize_loop:
MOVB 0(SI), R10
MOVB R10, 0(R11)
INCQ SI
INCQ R11
DECQ DX
JNZ finalize_loop
PXOR 0(DI), X0
MULTIPLY(X0, X1, X2, X3, X4, X5, X6)
process_next:
MOVQ BX, SI
MOVQ CX, DX
DECQ AX
JNZ loop
MOVQ R14, 0(DI)
MOVQ R15, 8(DI)
PXOR 0(DI), X0
MULTIPLY(X0, X1, X2, X3, X4, X5, X6)
MOVOU X0, 0(DI)
RET