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Diffstat (limited to 'arch/x86/crypto/aesni-intel_asm.S')
| -rw-r--r-- | arch/x86/crypto/aesni-intel_asm.S | 3161 |
1 files changed, 3161 insertions, 0 deletions
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S new file mode 100644 index 000000000..837c1e0aa --- /dev/null +++ b/arch/x86/crypto/aesni-intel_asm.S @@ -0,0 +1,3161 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Implement AES algorithm in Intel AES-NI instructions. + * + * The white paper of AES-NI instructions can be downloaded from: + * http://softwarecommunity.intel.com/isn/downloads/intelavx/AES-Instructions-Set_WP.pdf + * + * Copyright (C) 2008, Intel Corp. + * Author: Huang Ying <ying.huang@intel.com> + * Vinodh Gopal <vinodh.gopal@intel.com> + * Kahraman Akdemir + * + * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD + * interface for 64-bit kernels. + * Authors: Erdinc Ozturk (erdinc.ozturk@intel.com) + * Aidan O'Mahony (aidan.o.mahony@intel.com) + * Adrian Hoban <adrian.hoban@intel.com> + * James Guilford (james.guilford@intel.com) + * Gabriele Paoloni <gabriele.paoloni@intel.com> + * Tadeusz Struk (tadeusz.struk@intel.com) + * Wajdi Feghali (wajdi.k.feghali@intel.com) + * Copyright (c) 2010, Intel Corporation. + * + * Ported x86_64 version to x86: + * Author: Mathias Krause <minipli@googlemail.com> + */ + +#include <linux/linkage.h> +#include <asm/frame.h> +#include <asm/nospec-branch.h> + +/* + * The following macros are used to move an (un)aligned 16 byte value to/from + * an XMM register. This can done for either FP or integer values, for FP use + * movaps (move aligned packed single) or integer use movdqa (move double quad + * aligned). It doesn't make a performance difference which instruction is used + * since Nehalem (original Core i7) was released. However, the movaps is a byte + * shorter, so that is the one we'll use for now. (same for unaligned). + */ +#define MOVADQ movaps +#define MOVUDQ movups + +#ifdef __x86_64__ + +# constants in mergeable sections, linker can reorder and merge +.section .rodata.cst16.POLY, "aM", @progbits, 16 +.align 16 +POLY: .octa 0xC2000000000000000000000000000001 +.section .rodata.cst16.TWOONE, "aM", @progbits, 16 +.align 16 +TWOONE: .octa 0x00000001000000000000000000000001 + +.section .rodata.cst16.SHUF_MASK, "aM", @progbits, 16 +.align 16 +SHUF_MASK: .octa 0x000102030405060708090A0B0C0D0E0F +.section .rodata.cst16.MASK1, "aM", @progbits, 16 +.align 16 +MASK1: .octa 0x0000000000000000ffffffffffffffff +.section .rodata.cst16.MASK2, "aM", @progbits, 16 +.align 16 +MASK2: .octa 0xffffffffffffffff0000000000000000 +.section .rodata.cst16.ONE, "aM", @progbits, 16 +.align 16 +ONE: .octa 0x00000000000000000000000000000001 +.section .rodata.cst16.F_MIN_MASK, "aM", @progbits, 16 +.align 16 +F_MIN_MASK: .octa 0xf1f2f3f4f5f6f7f8f9fafbfcfdfeff0 +.section .rodata.cst16.dec, "aM", @progbits, 16 +.align 16 +dec: .octa 0x1 +.section .rodata.cst16.enc, "aM", @progbits, 16 +.align 16 +enc: .octa 0x2 + +# order of these constants should not change. +# more specifically, ALL_F should follow SHIFT_MASK, +# and zero should follow ALL_F +.section .rodata, "a", @progbits +.align 16 +SHIFT_MASK: .octa 0x0f0e0d0c0b0a09080706050403020100 +ALL_F: .octa 0xffffffffffffffffffffffffffffffff + .octa 0x00000000000000000000000000000000 + +.text + + +#define STACK_OFFSET 8*3 + +#define AadHash 16*0 +#define AadLen 16*1 +#define InLen (16*1)+8 +#define PBlockEncKey 16*2 +#define OrigIV 16*3 +#define CurCount 16*4 +#define PBlockLen 16*5 +#define HashKey 16*6 // store HashKey <<1 mod poly here +#define HashKey_2 16*7 // store HashKey^2 <<1 mod poly here +#define HashKey_3 16*8 // store HashKey^3 <<1 mod poly here +#define HashKey_4 16*9 // store HashKey^4 <<1 mod poly here +#define HashKey_k 16*10 // store XOR of High 64 bits and Low 64 + // bits of HashKey <<1 mod poly here + //(for Karatsuba purposes) +#define HashKey_2_k 16*11 // store XOR of High 64 bits and Low 64 + // bits of HashKey^2 <<1 mod poly here + // (for Karatsuba purposes) +#define HashKey_3_k 16*12 // store XOR of High 64 bits and Low 64 + // bits of HashKey^3 <<1 mod poly here + // (for Karatsuba purposes) +#define HashKey_4_k 16*13 // store XOR of High 64 bits and Low 64 + // bits of HashKey^4 <<1 mod poly here + // (for Karatsuba purposes) + +#define arg1 rdi +#define arg2 rsi +#define arg3 rdx +#define arg4 rcx +#define arg5 r8 +#define arg6 r9 +#define arg7 STACK_OFFSET+8(%rsp) +#define arg8 STACK_OFFSET+16(%rsp) +#define arg9 STACK_OFFSET+24(%rsp) +#define arg10 STACK_OFFSET+32(%rsp) +#define arg11 STACK_OFFSET+40(%rsp) +#define keysize 2*15*16(%arg1) +#endif + + +#define STATE1 %xmm0 +#define STATE2 %xmm4 +#define STATE3 %xmm5 +#define STATE4 %xmm6 +#define STATE STATE1 +#define IN1 %xmm1 +#define IN2 %xmm7 +#define IN3 %xmm8 +#define IN4 %xmm9 +#define IN IN1 +#define KEY %xmm2 +#define IV %xmm3 + +#define BSWAP_MASK %xmm10 +#define CTR %xmm11 +#define INC %xmm12 + +#define GF128MUL_MASK %xmm7 + +#ifdef __x86_64__ +#define AREG %rax +#define KEYP %rdi +#define OUTP %rsi +#define UKEYP OUTP +#define INP %rdx +#define LEN %rcx +#define IVP %r8 +#define KLEN %r9d +#define T1 %r10 +#define TKEYP T1 +#define T2 %r11 +#define TCTR_LOW T2 +#else +#define AREG %eax +#define KEYP %edi +#define OUTP AREG +#define UKEYP OUTP +#define INP %edx +#define LEN %esi +#define IVP %ebp +#define KLEN %ebx +#define T1 %ecx +#define TKEYP T1 +#endif + +.macro FUNC_SAVE + push %r12 + push %r13 + push %r14 +# +# states of %xmm registers %xmm6:%xmm15 not saved +# all %xmm registers are clobbered +# +.endm + + +.macro FUNC_RESTORE + pop %r14 + pop %r13 + pop %r12 +.endm + +# Precompute hashkeys. +# Input: Hash subkey. +# Output: HashKeys stored in gcm_context_data. Only needs to be called +# once per key. +# clobbers r12, and tmp xmm registers. +.macro PRECOMPUTE SUBKEY TMP1 TMP2 TMP3 TMP4 TMP5 TMP6 TMP7 + mov \SUBKEY, %r12 + movdqu (%r12), \TMP3 + movdqa SHUF_MASK(%rip), \TMP2 + pshufb \TMP2, \TMP3 + + # precompute HashKey<<1 mod poly from the HashKey (required for GHASH) + + movdqa \TMP3, \TMP2 + psllq $1, \TMP3 + psrlq $63, \TMP2 + movdqa \TMP2, \TMP1 + pslldq $8, \TMP2 + psrldq $8, \TMP1 + por \TMP2, \TMP3 + + # reduce HashKey<<1 + + pshufd $0x24, \TMP1, \TMP2 + pcmpeqd TWOONE(%rip), \TMP2 + pand POLY(%rip), \TMP2 + pxor \TMP2, \TMP3 + movdqu \TMP3, HashKey(%arg2) + + movdqa \TMP3, \TMP5 + pshufd $78, \TMP3, \TMP1 + pxor \TMP3, \TMP1 + movdqu \TMP1, HashKey_k(%arg2) + + GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7 +# TMP5 = HashKey^2<<1 (mod poly) + movdqu \TMP5, HashKey_2(%arg2) +# HashKey_2 = HashKey^2<<1 (mod poly) + pshufd $78, \TMP5, \TMP1 + pxor \TMP5, \TMP1 + movdqu \TMP1, HashKey_2_k(%arg2) + + GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7 +# TMP5 = HashKey^3<<1 (mod poly) + movdqu \TMP5, HashKey_3(%arg2) + pshufd $78, \TMP5, \TMP1 + pxor \TMP5, \TMP1 + movdqu \TMP1, HashKey_3_k(%arg2) + + GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7 +# TMP5 = HashKey^3<<1 (mod poly) + movdqu \TMP5, HashKey_4(%arg2) + pshufd $78, \TMP5, \TMP1 + pxor \TMP5, \TMP1 + movdqu \TMP1, HashKey_4_k(%arg2) +.endm + +# GCM_INIT initializes a gcm_context struct to prepare for encoding/decoding. +# Clobbers rax, r10-r13 and xmm0-xmm6, %xmm13 +.macro GCM_INIT Iv SUBKEY AAD AADLEN + mov \AADLEN, %r11 + mov %r11, AadLen(%arg2) # ctx_data.aad_length = aad_length + xor %r11d, %r11d + mov %r11, InLen(%arg2) # ctx_data.in_length = 0 + mov %r11, PBlockLen(%arg2) # ctx_data.partial_block_length = 0 + mov %r11, PBlockEncKey(%arg2) # ctx_data.partial_block_enc_key = 0 + mov \Iv, %rax + movdqu (%rax), %xmm0 + movdqu %xmm0, OrigIV(%arg2) # ctx_data.orig_IV = iv + + movdqa SHUF_MASK(%rip), %xmm2 + pshufb %xmm2, %xmm0 + movdqu %xmm0, CurCount(%arg2) # ctx_data.current_counter = iv + + PRECOMPUTE \SUBKEY, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7 + movdqu HashKey(%arg2), %xmm13 + + CALC_AAD_HASH %xmm13, \AAD, \AADLEN, %xmm0, %xmm1, %xmm2, %xmm3, \ + %xmm4, %xmm5, %xmm6 +.endm + +# GCM_ENC_DEC Encodes/Decodes given data. Assumes that the passed gcm_context +# struct has been initialized by GCM_INIT. +# Requires the input data be at least 1 byte long because of READ_PARTIAL_BLOCK +# Clobbers rax, r10-r13, and xmm0-xmm15 +.macro GCM_ENC_DEC operation + movdqu AadHash(%arg2), %xmm8 + movdqu HashKey(%arg2), %xmm13 + add %arg5, InLen(%arg2) + + xor %r11d, %r11d # initialise the data pointer offset as zero + PARTIAL_BLOCK %arg3 %arg4 %arg5 %r11 %xmm8 \operation + + sub %r11, %arg5 # sub partial block data used + mov %arg5, %r13 # save the number of bytes + + and $-16, %r13 # %r13 = %r13 - (%r13 mod 16) + mov %r13, %r12 + # Encrypt/Decrypt first few blocks + + and $(3<<4), %r12 + jz _initial_num_blocks_is_0_\@ + cmp $(2<<4), %r12 + jb _initial_num_blocks_is_1_\@ + je _initial_num_blocks_is_2_\@ +_initial_num_blocks_is_3_\@: + INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \ +%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, \operation + sub $48, %r13 + jmp _initial_blocks_\@ +_initial_num_blocks_is_2_\@: + INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \ +%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, \operation + sub $32, %r13 + jmp _initial_blocks_\@ +_initial_num_blocks_is_1_\@: + INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \ +%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, \operation + sub $16, %r13 + jmp _initial_blocks_\@ +_initial_num_blocks_is_0_\@: + INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \ +%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, \operation +_initial_blocks_\@: + + # Main loop - Encrypt/Decrypt remaining blocks + + test %r13, %r13 + je _zero_cipher_left_\@ + sub $64, %r13 + je _four_cipher_left_\@ +_crypt_by_4_\@: + GHASH_4_ENCRYPT_4_PARALLEL_\operation %xmm9, %xmm10, %xmm11, %xmm12, \ + %xmm13, %xmm14, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, \ + %xmm7, %xmm8, enc + add $64, %r11 + sub $64, %r13 + jne _crypt_by_4_\@ +_four_cipher_left_\@: + GHASH_LAST_4 %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, \ +%xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm8 +_zero_cipher_left_\@: + movdqu %xmm8, AadHash(%arg2) + movdqu %xmm0, CurCount(%arg2) + + mov %arg5, %r13 + and $15, %r13 # %r13 = arg5 (mod 16) + je _multiple_of_16_bytes_\@ + + mov %r13, PBlockLen(%arg2) + + # Handle the last <16 Byte block separately + paddd ONE(%rip), %xmm0 # INCR CNT to get Yn + movdqu %xmm0, CurCount(%arg2) + movdqa SHUF_MASK(%rip), %xmm10 + pshufb %xmm10, %xmm0 + + ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # Encrypt(K, Yn) + movdqu %xmm0, PBlockEncKey(%arg2) + + cmp $16, %arg5 + jge _large_enough_update_\@ + + lea (%arg4,%r11,1), %r10 + mov %r13, %r12 + READ_PARTIAL_BLOCK %r10 %r12 %xmm2 %xmm1 + jmp _data_read_\@ + +_large_enough_update_\@: + sub $16, %r11 + add %r13, %r11 + + # receive the last <16 Byte block + movdqu (%arg4, %r11, 1), %xmm1 + + sub %r13, %r11 + add $16, %r11 + + lea SHIFT_MASK+16(%rip), %r12 + # adjust the shuffle mask pointer to be able to shift 16-r13 bytes + # (r13 is the number of bytes in plaintext mod 16) + sub %r13, %r12 + # get the appropriate shuffle mask + movdqu (%r12), %xmm2 + # shift right 16-r13 bytes + pshufb %xmm2, %xmm1 + +_data_read_\@: + lea ALL_F+16(%rip), %r12 + sub %r13, %r12 + +.ifc \operation, dec + movdqa %xmm1, %xmm2 +.endif + pxor %xmm1, %xmm0 # XOR Encrypt(K, Yn) + movdqu (%r12), %xmm1 + # get the appropriate mask to mask out top 16-r13 bytes of xmm0 + pand %xmm1, %xmm0 # mask out top 16-r13 bytes of xmm0 +.ifc \operation, dec + pand %xmm1, %xmm2 + movdqa SHUF_MASK(%rip), %xmm10 + pshufb %xmm10 ,%xmm2 + + pxor %xmm2, %xmm8 +.else + movdqa SHUF_MASK(%rip), %xmm10 + pshufb %xmm10,%xmm0 + + pxor %xmm0, %xmm8 +.endif + + movdqu %xmm8, AadHash(%arg2) +.ifc \operation, enc + # GHASH computation for the last <16 byte block + movdqa SHUF_MASK(%rip), %xmm10 + # shuffle xmm0 back to output as ciphertext + pshufb %xmm10, %xmm0 +.endif + + # Output %r13 bytes + movq %xmm0, %rax + cmp $8, %r13 + jle _less_than_8_bytes_left_\@ + mov %rax, (%arg3 , %r11, 1) + add $8, %r11 + psrldq $8, %xmm0 + movq %xmm0, %rax + sub $8, %r13 +_less_than_8_bytes_left_\@: + mov %al, (%arg3, %r11, 1) + add $1, %r11 + shr $8, %rax + sub $1, %r13 + jne _less_than_8_bytes_left_\@ +_multiple_of_16_bytes_\@: +.endm + +# GCM_COMPLETE Finishes update of tag of last partial block +# Output: Authorization Tag (AUTH_TAG) +# Clobbers rax, r10-r12, and xmm0, xmm1, xmm5-xmm15 +.macro GCM_COMPLETE AUTHTAG AUTHTAGLEN + movdqu AadHash(%arg2), %xmm8 + movdqu HashKey(%arg2), %xmm13 + + mov PBlockLen(%arg2), %r12 + + test %r12, %r12 + je _partial_done\@ + + GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6 + +_partial_done\@: + mov AadLen(%arg2), %r12 # %r13 = aadLen (number of bytes) + shl $3, %r12 # convert into number of bits + movd %r12d, %xmm15 # len(A) in %xmm15 + mov InLen(%arg2), %r12 + shl $3, %r12 # len(C) in bits (*128) + movq %r12, %xmm1 + + pslldq $8, %xmm15 # %xmm15 = len(A)||0x0000000000000000 + pxor %xmm1, %xmm15 # %xmm15 = len(A)||len(C) + pxor %xmm15, %xmm8 + GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6 + # final GHASH computation + movdqa SHUF_MASK(%rip), %xmm10 + pshufb %xmm10, %xmm8 + + movdqu OrigIV(%arg2), %xmm0 # %xmm0 = Y0 + ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # E(K, Y0) + pxor %xmm8, %xmm0 +_return_T_\@: + mov \AUTHTAG, %r10 # %r10 = authTag + mov \AUTHTAGLEN, %r11 # %r11 = auth_tag_len + cmp $16, %r11 + je _T_16_\@ + cmp $8, %r11 + jl _T_4_\@ +_T_8_\@: + movq %xmm0, %rax + mov %rax, (%r10) + add $8, %r10 + sub $8, %r11 + psrldq $8, %xmm0 + test %r11, %r11 + je _return_T_done_\@ +_T_4_\@: + movd %xmm0, %eax + mov %eax, (%r10) + add $4, %r10 + sub $4, %r11 + psrldq $4, %xmm0 + test %r11, %r11 + je _return_T_done_\@ +_T_123_\@: + movd %xmm0, %eax + cmp $2, %r11 + jl _T_1_\@ + mov %ax, (%r10) + cmp $2, %r11 + je _return_T_done_\@ + add $2, %r10 + sar $16, %eax +_T_1_\@: + mov %al, (%r10) + jmp _return_T_done_\@ +_T_16_\@: + movdqu %xmm0, (%r10) +_return_T_done_\@: +.endm + +#ifdef __x86_64__ +/* GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0) +* +* +* Input: A and B (128-bits each, bit-reflected) +* Output: C = A*B*x mod poly, (i.e. >>1 ) +* To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input +* GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly. +* +*/ +.macro GHASH_MUL GH HK TMP1 TMP2 TMP3 TMP4 TMP5 + movdqa \GH, \TMP1 + pshufd $78, \GH, \TMP2 + pshufd $78, \HK, \TMP3 + pxor \GH, \TMP2 # TMP2 = a1+a0 + pxor \HK, \TMP3 # TMP3 = b1+b0 + pclmulqdq $0x11, \HK, \TMP1 # TMP1 = a1*b1 + pclmulqdq $0x00, \HK, \GH # GH = a0*b0 + pclmulqdq $0x00, \TMP3, \TMP2 # TMP2 = (a0+a1)*(b1+b0) + pxor \GH, \TMP2 + pxor \TMP1, \TMP2 # TMP2 = (a0*b0)+(a1*b0) + movdqa \TMP2, \TMP3 + pslldq $8, \TMP3 # left shift TMP3 2 DWs + psrldq $8, \TMP2 # right shift TMP2 2 DWs + pxor \TMP3, \GH + pxor \TMP2, \TMP1 # TMP2:GH holds the result of GH*HK + + # first phase of the reduction + + movdqa \GH, \TMP2 + movdqa \GH, \TMP3 + movdqa \GH, \TMP4 # copy GH into TMP2,TMP3 and TMP4 + # in in order to perform + # independent shifts + pslld $31, \TMP2 # packed right shift <<31 + pslld $30, \TMP3 # packed right shift <<30 + pslld $25, \TMP4 # packed right shift <<25 + pxor \TMP3, \TMP2 # xor the shifted versions + pxor \TMP4, \TMP2 + movdqa \TMP2, \TMP5 + psrldq $4, \TMP5 # right shift TMP5 1 DW + pslldq $12, \TMP2 # left shift TMP2 3 DWs + pxor \TMP2, \GH + + # second phase of the reduction + + movdqa \GH,\TMP2 # copy GH into TMP2,TMP3 and TMP4 + # in in order to perform + # independent shifts + movdqa \GH,\TMP3 + movdqa \GH,\TMP4 + psrld $1,\TMP2 # packed left shift >>1 + psrld $2,\TMP3 # packed left shift >>2 + psrld $7,\TMP4 # packed left shift >>7 + pxor \TMP3,\TMP2 # xor the shifted versions + pxor \TMP4,\TMP2 + pxor \TMP5, \TMP2 + pxor \TMP2, \GH + pxor \TMP1, \GH # result is in TMP1 +.endm + +# Reads DLEN bytes starting at DPTR and stores in XMMDst +# where 0 < DLEN < 16 +# Clobbers %rax, DLEN and XMM1 +.macro READ_PARTIAL_BLOCK DPTR DLEN XMM1 XMMDst + cmp $8, \DLEN + jl _read_lt8_\@ + mov (\DPTR), %rax + movq %rax, \XMMDst + sub $8, \DLEN + jz _done_read_partial_block_\@ + xor %eax, %eax +_read_next_byte_\@: + shl $8, %rax + mov 7(\DPTR, \DLEN, 1), %al + dec \DLEN + jnz _read_next_byte_\@ + movq %rax, \XMM1 + pslldq $8, \XMM1 + por \XMM1, \XMMDst + jmp _done_read_partial_block_\@ +_read_lt8_\@: + xor %eax, %eax +_read_next_byte_lt8_\@: + shl $8, %rax + mov -1(\DPTR, \DLEN, 1), %al + dec \DLEN + jnz _read_next_byte_lt8_\@ + movq %rax, \XMMDst +_done_read_partial_block_\@: +.endm + +# CALC_AAD_HASH: Calculates the hash of the data which will not be encrypted. +# clobbers r10-11, xmm14 +.macro CALC_AAD_HASH HASHKEY AAD AADLEN TMP1 TMP2 TMP3 TMP4 TMP5 \ + TMP6 TMP7 + MOVADQ SHUF_MASK(%rip), %xmm14 + mov \AAD, %r10 # %r10 = AAD + mov \AADLEN, %r11 # %r11 = aadLen + pxor \TMP7, \TMP7 + pxor \TMP6, \TMP6 + + cmp $16, %r11 + jl _get_AAD_rest\@ +_get_AAD_blocks\@: + movdqu (%r10), \TMP7 + pshufb %xmm14, \TMP7 # byte-reflect the AAD data + pxor \TMP7, \TMP6 + GHASH_MUL \TMP6, \HASHKEY, \TMP1, \TMP2, \TMP3, \TMP4, \TMP5 + add $16, %r10 + sub $16, %r11 + cmp $16, %r11 + jge _get_AAD_blocks\@ + + movdqu \TMP6, \TMP7 + + /* read the last <16B of AAD */ +_get_AAD_rest\@: + test %r11, %r11 + je _get_AAD_done\@ + + READ_PARTIAL_BLOCK %r10, %r11, \TMP1, \TMP7 + pshufb %xmm14, \TMP7 # byte-reflect the AAD data + pxor \TMP6, \TMP7 + GHASH_MUL \TMP7, \HASHKEY, \TMP1, \TMP2, \TMP3, \TMP4, \TMP5 + movdqu \TMP7, \TMP6 + +_get_AAD_done\@: + movdqu \TMP6, AadHash(%arg2) +.endm + +# PARTIAL_BLOCK: Handles encryption/decryption and the tag partial blocks +# between update calls. +# Requires the input data be at least 1 byte long due to READ_PARTIAL_BLOCK +# Outputs encrypted bytes, and updates hash and partial info in gcm_data_context +# Clobbers rax, r10, r12, r13, xmm0-6, xmm9-13 +.macro PARTIAL_BLOCK CYPH_PLAIN_OUT PLAIN_CYPH_IN PLAIN_CYPH_LEN DATA_OFFSET \ + AAD_HASH operation + mov PBlockLen(%arg2), %r13 + test %r13, %r13 + je _partial_block_done_\@ # Leave Macro if no partial blocks + # Read in input data without over reading + cmp $16, \PLAIN_CYPH_LEN + jl _fewer_than_16_bytes_\@ + movups (\PLAIN_CYPH_IN), %xmm1 # If more than 16 bytes, just fill xmm + jmp _data_read_\@ + +_fewer_than_16_bytes_\@: + lea (\PLAIN_CYPH_IN, \DATA_OFFSET, 1), %r10 + mov \PLAIN_CYPH_LEN, %r12 + READ_PARTIAL_BLOCK %r10 %r12 %xmm0 %xmm1 + + mov PBlockLen(%arg2), %r13 + +_data_read_\@: # Finished reading in data + + movdqu PBlockEncKey(%arg2), %xmm9 + movdqu HashKey(%arg2), %xmm13 + + lea SHIFT_MASK(%rip), %r12 + + # adjust the shuffle mask pointer to be able to shift r13 bytes + # r16-r13 is the number of bytes in plaintext mod 16) + add %r13, %r12 + movdqu (%r12), %xmm2 # get the appropriate shuffle mask + pshufb %xmm2, %xmm9 # shift right r13 bytes + +.ifc \operation, dec + movdqa %xmm1, %xmm3 + pxor %xmm1, %xmm9 # Cyphertext XOR E(K, Yn) + + mov \PLAIN_CYPH_LEN, %r10 + add %r13, %r10 + # Set r10 to be the amount of data left in CYPH_PLAIN_IN after filling + sub $16, %r10 + # Determine if if partial block is not being filled and + # shift mask accordingly + jge _no_extra_mask_1_\@ + sub %r10, %r12 +_no_extra_mask_1_\@: + + movdqu ALL_F-SHIFT_MASK(%r12), %xmm1 + # get the appropriate mask to mask out bottom r13 bytes of xmm9 + pand %xmm1, %xmm9 # mask out bottom r13 bytes of xmm9 + + pand %xmm1, %xmm3 + movdqa SHUF_MASK(%rip), %xmm10 + pshufb %xmm10, %xmm3 + pshufb %xmm2, %xmm3 + pxor %xmm3, \AAD_HASH + + test %r10, %r10 + jl _partial_incomplete_1_\@ + + # GHASH computation for the last <16 Byte block + GHASH_MUL \AAD_HASH, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 + xor %eax, %eax + + mov %rax, PBlockLen(%arg2) + jmp _dec_done_\@ +_partial_incomplete_1_\@: + add \PLAIN_CYPH_LEN, PBlockLen(%arg2) +_dec_done_\@: + movdqu \AAD_HASH, AadHash(%arg2) +.else + pxor %xmm1, %xmm9 # Plaintext XOR E(K, Yn) + + mov \PLAIN_CYPH_LEN, %r10 + add %r13, %r10 + # Set r10 to be the amount of data left in CYPH_PLAIN_IN after filling + sub $16, %r10 + # Determine if if partial block is not being filled and + # shift mask accordingly + jge _no_extra_mask_2_\@ + sub %r10, %r12 +_no_extra_mask_2_\@: + + movdqu ALL_F-SHIFT_MASK(%r12), %xmm1 + # get the appropriate mask to mask out bottom r13 bytes of xmm9 + pand %xmm1, %xmm9 + + movdqa SHUF_MASK(%rip), %xmm1 + pshufb %xmm1, %xmm9 + pshufb %xmm2, %xmm9 + pxor %xmm9, \AAD_HASH + + test %r10, %r10 + jl _partial_incomplete_2_\@ + + # GHASH computation for the last <16 Byte block + GHASH_MUL \AAD_HASH, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 + xor %eax, %eax + + mov %rax, PBlockLen(%arg2) + jmp _encode_done_\@ +_partial_incomplete_2_\@: + add \PLAIN_CYPH_LEN, PBlockLen(%arg2) +_encode_done_\@: + movdqu \AAD_HASH, AadHash(%arg2) + + movdqa SHUF_MASK(%rip), %xmm10 + # shuffle xmm9 back to output as ciphertext + pshufb %xmm10, %xmm9 + pshufb %xmm2, %xmm9 +.endif + # output encrypted Bytes + test %r10, %r10 + jl _partial_fill_\@ + mov %r13, %r12 + mov $16, %r13 + # Set r13 to be the number of bytes to write out + sub %r12, %r13 + jmp _count_set_\@ +_partial_fill_\@: + mov \PLAIN_CYPH_LEN, %r13 +_count_set_\@: + movdqa %xmm9, %xmm0 + movq %xmm0, %rax + cmp $8, %r13 + jle _less_than_8_bytes_left_\@ + + mov %rax, (\CYPH_PLAIN_OUT, \DATA_OFFSET, 1) + add $8, \DATA_OFFSET + psrldq $8, %xmm0 + movq %xmm0, %rax + sub $8, %r13 +_less_than_8_bytes_left_\@: + movb %al, (\CYPH_PLAIN_OUT, \DATA_OFFSET, 1) + add $1, \DATA_OFFSET + shr $8, %rax + sub $1, %r13 + jne _less_than_8_bytes_left_\@ +_partial_block_done_\@: +.endm # PARTIAL_BLOCK + +/* +* if a = number of total plaintext bytes +* b = floor(a/16) +* num_initial_blocks = b mod 4 +* encrypt the initial num_initial_blocks blocks and apply ghash on +* the ciphertext +* %r10, %r11, %r12, %rax, %xmm5, %xmm6, %xmm7, %xmm8, %xmm9 registers +* are clobbered +* arg1, %arg2, %arg3 are used as a pointer only, not modified +*/ + + +.macro INITIAL_BLOCKS_ENC_DEC TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \ + XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation + MOVADQ SHUF_MASK(%rip), %xmm14 + + movdqu AadHash(%arg2), %xmm\i # XMM0 = Y0 + + # start AES for num_initial_blocks blocks + + movdqu CurCount(%arg2), \XMM0 # XMM0 = Y0 + +.if (\i == 5) || (\i == 6) || (\i == 7) + + MOVADQ ONE(%RIP),\TMP1 + MOVADQ 0(%arg1),\TMP2 +.irpc index, \i_seq + paddd \TMP1, \XMM0 # INCR Y0 +.ifc \operation, dec + movdqa \XMM0, %xmm\index +.else + MOVADQ \XMM0, %xmm\index +.endif + pshufb %xmm14, %xmm\index # perform a 16 byte swap + pxor \TMP2, %xmm\index +.endr + lea 0x10(%arg1),%r10 + mov keysize,%eax + shr $2,%eax # 128->4, 192->6, 256->8 + add $5,%eax # 128->9, 192->11, 256->13 + +aes_loop_initial_\@: + MOVADQ (%r10),\TMP1 +.irpc index, \i_seq + aesenc \TMP1, %xmm\index +.endr + add $16,%r10 + sub $1,%eax + jnz aes_loop_initial_\@ + + MOVADQ (%r10), \TMP1 +.irpc index, \i_seq + aesenclast \TMP1, %xmm\index # Last Round +.endr +.irpc index, \i_seq + movdqu (%arg4 , %r11, 1), \TMP1 + pxor \TMP1, %xmm\index + movdqu %xmm\index, (%arg3 , %r11, 1) + # write back plaintext/ciphertext for num_initial_blocks + add $16, %r11 + +.ifc \operation, dec + movdqa \TMP1, %xmm\index +.endif + pshufb %xmm14, %xmm\index + + # prepare plaintext/ciphertext for GHASH computation +.endr +.endif + + # apply GHASH on num_initial_blocks blocks + +.if \i == 5 + pxor %xmm5, %xmm6 + GHASH_MUL %xmm6, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1 + pxor %xmm6, %xmm7 + GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1 + pxor %xmm7, %xmm8 + GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1 +.elseif \i == 6 + pxor %xmm6, %xmm7 + GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1 + pxor %xmm7, %xmm8 + GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1 +.elseif \i == 7 + pxor %xmm7, %xmm8 + GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1 +.endif + cmp $64, %r13 + jl _initial_blocks_done\@ + # no need for precomputed values +/* +* +* Precomputations for HashKey parallel with encryption of first 4 blocks. +* Haskey_i_k holds XORed values of the low and high parts of the Haskey_i +*/ + MOVADQ ONE(%RIP),\TMP1 + paddd \TMP1, \XMM0 # INCR Y0 + MOVADQ \XMM0, \XMM1 + pshufb %xmm14, \XMM1 # perform a 16 byte swap + + paddd \TMP1, \XMM0 # INCR Y0 + MOVADQ \XMM0, \XMM2 + pshufb %xmm14, \XMM2 # perform a 16 byte swap + + paddd \TMP1, \XMM0 # INCR Y0 + MOVADQ \XMM0, \XMM3 + pshufb %xmm14, \XMM3 # perform a 16 byte swap + + paddd \TMP1, \XMM0 # INCR Y0 + MOVADQ \XMM0, \XMM4 + pshufb %xmm14, \XMM4 # perform a 16 byte swap + + MOVADQ 0(%arg1),\TMP1 + pxor \TMP1, \XMM1 + pxor \TMP1, \XMM2 + pxor \TMP1, \XMM3 + pxor \TMP1, \XMM4 +.irpc index, 1234 # do 4 rounds + movaps 0x10*\index(%arg1), \TMP1 + aesenc \TMP1, \XMM1 + aesenc \TMP1, \XMM2 + aesenc \TMP1, \XMM3 + aesenc \TMP1, \XMM4 +.endr +.irpc index, 56789 # do next 5 rounds + movaps 0x10*\index(%arg1), \TMP1 + aesenc \TMP1, \XMM1 + aesenc \TMP1, \XMM2 + aesenc \TMP1, \XMM3 + aesenc \TMP1, \XMM4 +.endr + lea 0xa0(%arg1),%r10 + mov keysize,%eax + shr $2,%eax # 128->4, 192->6, 256->8 + sub $4,%eax # 128->0, 192->2, 256->4 + jz aes_loop_pre_done\@ + +aes_loop_pre_\@: + MOVADQ (%r10),\TMP2 +.irpc index, 1234 + aesenc \TMP2, %xmm\index +.endr + add $16,%r10 + sub $1,%eax + jnz aes_loop_pre_\@ + +aes_loop_pre_done\@: + MOVADQ (%r10), \TMP2 + aesenclast \TMP2, \XMM1 + aesenclast \TMP2, \XMM2 + aesenclast \TMP2, \XMM3 + aesenclast \TMP2, \XMM4 + movdqu 16*0(%arg4 , %r11 , 1), \TMP1 + pxor \TMP1, \XMM1 +.ifc \operation, dec + movdqu \XMM1, 16*0(%arg3 , %r11 , 1) + movdqa \TMP1, \XMM1 +.endif + movdqu 16*1(%arg4 , %r11 , 1), \TMP1 + pxor \TMP1, \XMM2 +.ifc \operation, dec + movdqu \XMM2, 16*1(%arg3 , %r11 , 1) + movdqa \TMP1, \XMM2 +.endif + movdqu 16*2(%arg4 , %r11 , 1), \TMP1 + pxor \TMP1, \XMM3 +.ifc \operation, dec + movdqu \XMM3, 16*2(%arg3 , %r11 , 1) + movdqa \TMP1, \XMM3 +.endif + movdqu 16*3(%arg4 , %r11 , 1), \TMP1 + pxor \TMP1, \XMM4 +.ifc \operation, dec + movdqu \XMM4, 16*3(%arg3 , %r11 , 1) + movdqa \TMP1, \XMM4 +.else + movdqu \XMM1, 16*0(%arg3 , %r11 , 1) + movdqu \XMM2, 16*1(%arg3 , %r11 , 1) + movdqu \XMM3, 16*2(%arg3 , %r11 , 1) + movdqu \XMM4, 16*3(%arg3 , %r11 , 1) +.endif + + add $64, %r11 + pshufb %xmm14, \XMM1 # perform a 16 byte swap + pxor \XMMDst, \XMM1 +# combine GHASHed value with the corresponding ciphertext + pshufb %xmm14, \XMM2 # perform a 16 byte swap + pshufb %xmm14, \XMM3 # perform a 16 byte swap + pshufb %xmm14, \XMM4 # perform a 16 byte swap + +_initial_blocks_done\@: + +.endm + +/* +* encrypt 4 blocks at a time +* ghash the 4 previously encrypted ciphertext blocks +* arg1, %arg3, %arg4 are used as pointers only, not modified +* %r11 is the data offset value +*/ +.macro GHASH_4_ENCRYPT_4_PARALLEL_enc TMP1 TMP2 TMP3 TMP4 TMP5 \ +TMP6 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 operation + + movdqa \XMM1, \XMM5 + movdqa \XMM2, \XMM6 + movdqa \XMM3, \XMM7 + movdqa \XMM4, \XMM8 + + movdqa SHUF_MASK(%rip), %xmm15 + # multiply TMP5 * HashKey using karatsuba + + movdqa \XMM5, \TMP4 + pshufd $78, \XMM5, \TMP6 + pxor \XMM5, \TMP6 + paddd ONE(%rip), \XMM0 # INCR CNT + movdqu HashKey_4(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP4 # TMP4 = a1*b1 + movdqa \XMM0, \XMM1 + paddd ONE(%rip), \XMM0 # INCR CNT + movdqa \XMM0, \XMM2 + paddd ONE(%rip), \XMM0 # INCR CNT + movdqa \XMM0, \XMM3 + paddd ONE(%rip), \XMM0 # INCR CNT + movdqa \XMM0, \XMM4 + pshufb %xmm15, \XMM1 # perform a 16 byte swap + pclmulqdq $0x00, \TMP5, \XMM5 # XMM5 = a0*b0 + pshufb %xmm15, \XMM2 # perform a 16 byte swap + pshufb %xmm15, \XMM3 # perform a 16 byte swap + pshufb %xmm15, \XMM4 # perform a 16 byte swap + + pxor (%arg1), \XMM1 + pxor (%arg1), \XMM2 + pxor (%arg1), \XMM3 + pxor (%arg1), \XMM4 + movdqu HashKey_4_k(%arg2), \TMP5 + pclmulqdq $0x00, \TMP5, \TMP6 # TMP6 = (a1+a0)*(b1+b0) + movaps 0x10(%arg1), \TMP1 + aesenc \TMP1, \XMM1 # Round 1 + aesenc \TMP1, \XMM2 + aesenc \TMP1, \XMM3 + aesenc \TMP1, \XMM4 + movaps 0x20(%arg1), \TMP1 + aesenc \TMP1, \XMM1 # Round 2 + aesenc \TMP1, \XMM2 + aesenc \TMP1, \XMM3 + aesenc \TMP1, \XMM4 + movdqa \XMM6, \TMP1 + pshufd $78, \XMM6, \TMP2 + pxor \XMM6, \TMP2 + movdqu HashKey_3(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1 * b1 + movaps 0x30(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 3 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pclmulqdq $0x00, \TMP5, \XMM6 # XMM6 = a0*b0 + movaps 0x40(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 4 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + movdqu HashKey_3_k(%arg2), \TMP5 + pclmulqdq $0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + movaps 0x50(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 5 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pxor \TMP1, \TMP4 +# accumulate the results in TMP4:XMM5, TMP6 holds the middle part + pxor \XMM6, \XMM5 + pxor \TMP2, \TMP6 + movdqa \XMM7, \TMP1 + pshufd $78, \XMM7, \TMP2 + pxor \XMM7, \TMP2 + movdqu HashKey_2(%arg2), \TMP5 + + # Multiply TMP5 * HashKey using karatsuba + + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1*b1 + movaps 0x60(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 6 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pclmulqdq $0x00, \TMP5, \XMM7 # XMM7 = a0*b0 + movaps 0x70(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 7 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + movdqu HashKey_2_k(%arg2), \TMP5 + pclmulqdq $0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + movaps 0x80(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 8 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pxor \TMP1, \TMP4 +# accumulate the results in TMP4:XMM5, TMP6 holds the middle part + pxor \XMM7, \XMM5 + pxor \TMP2, \TMP6 + + # Multiply XMM8 * HashKey + # XMM8 and TMP5 hold the values for the two operands + + movdqa \XMM8, \TMP1 + pshufd $78, \XMM8, \TMP2 + pxor \XMM8, \TMP2 + movdqu HashKey(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1*b1 + movaps 0x90(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 9 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pclmulqdq $0x00, \TMP5, \XMM8 # XMM8 = a0*b0 + lea 0xa0(%arg1),%r10 + mov keysize,%eax + shr $2,%eax # 128->4, 192->6, 256->8 + sub $4,%eax # 128->0, 192->2, 256->4 + jz aes_loop_par_enc_done\@ + +aes_loop_par_enc\@: + MOVADQ (%r10),\TMP3 +.irpc index, 1234 + aesenc \TMP3, %xmm\index +.endr + add $16,%r10 + sub $1,%eax + jnz aes_loop_par_enc\@ + +aes_loop_par_enc_done\@: + MOVADQ (%r10), \TMP3 + aesenclast \TMP3, \XMM1 # Round 10 + aesenclast \TMP3, \XMM2 + aesenclast \TMP3, \XMM3 + aesenclast \TMP3, \XMM4 + movdqu HashKey_k(%arg2), \TMP5 + pclmulqdq $0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + movdqu (%arg4,%r11,1), \TMP3 + pxor \TMP3, \XMM1 # Ciphertext/Plaintext XOR EK + movdqu 16(%arg4,%r11,1), \TMP3 + pxor \TMP3, \XMM2 # Ciphertext/Plaintext XOR EK + movdqu 32(%arg4,%r11,1), \TMP3 + pxor \TMP3, \XMM3 # Ciphertext/Plaintext XOR EK + movdqu 48(%arg4,%r11,1), \TMP3 + pxor \TMP3, \XMM4 # Ciphertext/Plaintext XOR EK + movdqu \XMM1, (%arg3,%r11,1) # Write to the ciphertext buffer + movdqu \XMM2, 16(%arg3,%r11,1) # Write to the ciphertext buffer + movdqu \XMM3, 32(%arg3,%r11,1) # Write to the ciphertext buffer + movdqu \XMM4, 48(%arg3,%r11,1) # Write to the ciphertext buffer + pshufb %xmm15, \XMM1 # perform a 16 byte swap + pshufb %xmm15, \XMM2 # perform a 16 byte swap + pshufb %xmm15, \XMM3 # perform a 16 byte swap + pshufb %xmm15, \XMM4 # perform a 16 byte swap + + pxor \TMP4, \TMP1 + pxor \XMM8, \XMM5 + pxor \TMP6, \TMP2 + pxor \TMP1, \TMP2 + pxor \XMM5, \TMP2 + movdqa \TMP2, \TMP3 + pslldq $8, \TMP3 # left shift TMP3 2 DWs + psrldq $8, \TMP2 # right shift TMP2 2 DWs + pxor \TMP3, \XMM5 + pxor \TMP2, \TMP1 # accumulate the results in TMP1:XMM5 + + # first phase of reduction + + movdqa \XMM5, \TMP2 + movdqa \XMM5, \TMP3 + movdqa \XMM5, \TMP4 +# move XMM5 into TMP2, TMP3, TMP4 in order to perform shifts independently + pslld $31, \TMP2 # packed right shift << 31 + pslld $30, \TMP3 # packed right shift << 30 + pslld $25, \TMP4 # packed right shift << 25 + pxor \TMP3, \TMP2 # xor the shifted versions + pxor \TMP4, \TMP2 + movdqa \TMP2, \TMP5 + psrldq $4, \TMP5 # right shift T5 1 DW + pslldq $12, \TMP2 # left shift T2 3 DWs + pxor \TMP2, \XMM5 + + # second phase of reduction + + movdqa \XMM5,\TMP2 # make 3 copies of XMM5 into TMP2, TMP3, TMP4 + movdqa \XMM5,\TMP3 + movdqa \XMM5,\TMP4 + psrld $1, \TMP2 # packed left shift >>1 + psrld $2, \TMP3 # packed left shift >>2 + psrld $7, \TMP4 # packed left shift >>7 + pxor \TMP3,\TMP2 # xor the shifted versions + pxor \TMP4,\TMP2 + pxor \TMP5, \TMP2 + pxor \TMP2, \XMM5 + pxor \TMP1, \XMM5 # result is in TMP1 + + pxor \XMM5, \XMM1 +.endm + +/* +* decrypt 4 blocks at a time +* ghash the 4 previously decrypted ciphertext blocks +* arg1, %arg3, %arg4 are used as pointers only, not modified +* %r11 is the data offset value +*/ +.macro GHASH_4_ENCRYPT_4_PARALLEL_dec TMP1 TMP2 TMP3 TMP4 TMP5 \ +TMP6 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 operation + + movdqa \XMM1, \XMM5 + movdqa \XMM2, \XMM6 + movdqa \XMM3, \XMM7 + movdqa \XMM4, \XMM8 + + movdqa SHUF_MASK(%rip), %xmm15 + # multiply TMP5 * HashKey using karatsuba + + movdqa \XMM5, \TMP4 + pshufd $78, \XMM5, \TMP6 + pxor \XMM5, \TMP6 + paddd ONE(%rip), \XMM0 # INCR CNT + movdqu HashKey_4(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP4 # TMP4 = a1*b1 + movdqa \XMM0, \XMM1 + paddd ONE(%rip), \XMM0 # INCR CNT + movdqa \XMM0, \XMM2 + paddd ONE(%rip), \XMM0 # INCR CNT + movdqa \XMM0, \XMM3 + paddd ONE(%rip), \XMM0 # INCR CNT + movdqa \XMM0, \XMM4 + pshufb %xmm15, \XMM1 # perform a 16 byte swap + pclmulqdq $0x00, \TMP5, \XMM5 # XMM5 = a0*b0 + pshufb %xmm15, \XMM2 # perform a 16 byte swap + pshufb %xmm15, \XMM3 # perform a 16 byte swap + pshufb %xmm15, \XMM4 # perform a 16 byte swap + + pxor (%arg1), \XMM1 + pxor (%arg1), \XMM2 + pxor (%arg1), \XMM3 + pxor (%arg1), \XMM4 + movdqu HashKey_4_k(%arg2), \TMP5 + pclmulqdq $0x00, \TMP5, \TMP6 # TMP6 = (a1+a0)*(b1+b0) + movaps 0x10(%arg1), \TMP1 + aesenc \TMP1, \XMM1 # Round 1 + aesenc \TMP1, \XMM2 + aesenc \TMP1, \XMM3 + aesenc \TMP1, \XMM4 + movaps 0x20(%arg1), \TMP1 + aesenc \TMP1, \XMM1 # Round 2 + aesenc \TMP1, \XMM2 + aesenc \TMP1, \XMM3 + aesenc \TMP1, \XMM4 + movdqa \XMM6, \TMP1 + pshufd $78, \XMM6, \TMP2 + pxor \XMM6, \TMP2 + movdqu HashKey_3(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1 * b1 + movaps 0x30(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 3 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pclmulqdq $0x00, \TMP5, \XMM6 # XMM6 = a0*b0 + movaps 0x40(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 4 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + movdqu HashKey_3_k(%arg2), \TMP5 + pclmulqdq $0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + movaps 0x50(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 5 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pxor \TMP1, \TMP4 +# accumulate the results in TMP4:XMM5, TMP6 holds the middle part + pxor \XMM6, \XMM5 + pxor \TMP2, \TMP6 + movdqa \XMM7, \TMP1 + pshufd $78, \XMM7, \TMP2 + pxor \XMM7, \TMP2 + movdqu HashKey_2(%arg2), \TMP5 + + # Multiply TMP5 * HashKey using karatsuba + + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1*b1 + movaps 0x60(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 6 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pclmulqdq $0x00, \TMP5, \XMM7 # XMM7 = a0*b0 + movaps 0x70(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 7 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + movdqu HashKey_2_k(%arg2), \TMP5 + pclmulqdq $0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + movaps 0x80(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 8 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pxor \TMP1, \TMP4 +# accumulate the results in TMP4:XMM5, TMP6 holds the middle part + pxor \XMM7, \XMM5 + pxor \TMP2, \TMP6 + + # Multiply XMM8 * HashKey + # XMM8 and TMP5 hold the values for the two operands + + movdqa \XMM8, \TMP1 + pshufd $78, \XMM8, \TMP2 + pxor \XMM8, \TMP2 + movdqu HashKey(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1*b1 + movaps 0x90(%arg1), \TMP3 + aesenc \TMP3, \XMM1 # Round 9 + aesenc \TMP3, \XMM2 + aesenc \TMP3, \XMM3 + aesenc \TMP3, \XMM4 + pclmulqdq $0x00, \TMP5, \XMM8 # XMM8 = a0*b0 + lea 0xa0(%arg1),%r10 + mov keysize,%eax + shr $2,%eax # 128->4, 192->6, 256->8 + sub $4,%eax # 128->0, 192->2, 256->4 + jz aes_loop_par_dec_done\@ + +aes_loop_par_dec\@: + MOVADQ (%r10),\TMP3 +.irpc index, 1234 + aesenc \TMP3, %xmm\index +.endr + add $16,%r10 + sub $1,%eax + jnz aes_loop_par_dec\@ + +aes_loop_par_dec_done\@: + MOVADQ (%r10), \TMP3 + aesenclast \TMP3, \XMM1 # last round + aesenclast \TMP3, \XMM2 + aesenclast \TMP3, \XMM3 + aesenclast \TMP3, \XMM4 + movdqu HashKey_k(%arg2), \TMP5 + pclmulqdq $0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + movdqu (%arg4,%r11,1), \TMP3 + pxor \TMP3, \XMM1 # Ciphertext/Plaintext XOR EK + movdqu \XMM1, (%arg3,%r11,1) # Write to plaintext buffer + movdqa \TMP3, \XMM1 + movdqu 16(%arg4,%r11,1), \TMP3 + pxor \TMP3, \XMM2 # Ciphertext/Plaintext XOR EK + movdqu \XMM2, 16(%arg3,%r11,1) # Write to plaintext buffer + movdqa \TMP3, \XMM2 + movdqu 32(%arg4,%r11,1), \TMP3 + pxor \TMP3, \XMM3 # Ciphertext/Plaintext XOR EK + movdqu \XMM3, 32(%arg3,%r11,1) # Write to plaintext buffer + movdqa \TMP3, \XMM3 + movdqu 48(%arg4,%r11,1), \TMP3 + pxor \TMP3, \XMM4 # Ciphertext/Plaintext XOR EK + movdqu \XMM4, 48(%arg3,%r11,1) # Write to plaintext buffer + movdqa \TMP3, \XMM4 + pshufb %xmm15, \XMM1 # perform a 16 byte swap + pshufb %xmm15, \XMM2 # perform a 16 byte swap + pshufb %xmm15, \XMM3 # perform a 16 byte swap + pshufb %xmm15, \XMM4 # perform a 16 byte swap + + pxor \TMP4, \TMP1 + pxor \XMM8, \XMM5 + pxor \TMP6, \TMP2 + pxor \TMP1, \TMP2 + pxor \XMM5, \TMP2 + movdqa \TMP2, \TMP3 + pslldq $8, \TMP3 # left shift TMP3 2 DWs + psrldq $8, \TMP2 # right shift TMP2 2 DWs + pxor \TMP3, \XMM5 + pxor \TMP2, \TMP1 # accumulate the results in TMP1:XMM5 + + # first phase of reduction + + movdqa \XMM5, \TMP2 + movdqa \XMM5, \TMP3 + movdqa \XMM5, \TMP4 +# move XMM5 into TMP2, TMP3, TMP4 in order to perform shifts independently + pslld $31, \TMP2 # packed right shift << 31 + pslld $30, \TMP3 # packed right shift << 30 + pslld $25, \TMP4 # packed right shift << 25 + pxor \TMP3, \TMP2 # xor the shifted versions + pxor \TMP4, \TMP2 + movdqa \TMP2, \TMP5 + psrldq $4, \TMP5 # right shift T5 1 DW + pslldq $12, \TMP2 # left shift T2 3 DWs + pxor \TMP2, \XMM5 + + # second phase of reduction + + movdqa \XMM5,\TMP2 # make 3 copies of XMM5 into TMP2, TMP3, TMP4 + movdqa \XMM5,\TMP3 + movdqa \XMM5,\TMP4 + psrld $1, \TMP2 # packed left shift >>1 + psrld $2, \TMP3 # packed left shift >>2 + psrld $7, \TMP4 # packed left shift >>7 + pxor \TMP3,\TMP2 # xor the shifted versions + pxor \TMP4,\TMP2 + pxor \TMP5, \TMP2 + pxor \TMP2, \XMM5 + pxor \TMP1, \XMM5 # result is in TMP1 + + pxor \XMM5, \XMM1 +.endm + +/* GHASH the last 4 ciphertext blocks. */ +.macro GHASH_LAST_4 TMP1 TMP2 TMP3 TMP4 TMP5 TMP6 \ +TMP7 XMM1 XMM2 XMM3 XMM4 XMMDst + + # Multiply TMP6 * HashKey (using Karatsuba) + + movdqa \XMM1, \TMP6 + pshufd $78, \XMM1, \TMP2 + pxor \XMM1, \TMP2 + movdqu HashKey_4(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP6 # TMP6 = a1*b1 + pclmulqdq $0x00, \TMP5, \XMM1 # XMM1 = a0*b0 + movdqu HashKey_4_k(%arg2), \TMP4 + pclmulqdq $0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + movdqa \XMM1, \XMMDst + movdqa \TMP2, \XMM1 # result in TMP6, XMMDst, XMM1 + + # Multiply TMP1 * HashKey (using Karatsuba) + + movdqa \XMM2, \TMP1 + pshufd $78, \XMM2, \TMP2 + pxor \XMM2, \TMP2 + movdqu HashKey_3(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1*b1 + pclmulqdq $0x00, \TMP5, \XMM2 # XMM2 = a0*b0 + movdqu HashKey_3_k(%arg2), \TMP4 + pclmulqdq $0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + pxor \TMP1, \TMP6 + pxor \XMM2, \XMMDst + pxor \TMP2, \XMM1 +# results accumulated in TMP6, XMMDst, XMM1 + + # Multiply TMP1 * HashKey (using Karatsuba) + + movdqa \XMM3, \TMP1 + pshufd $78, \XMM3, \TMP2 + pxor \XMM3, \TMP2 + movdqu HashKey_2(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1*b1 + pclmulqdq $0x00, \TMP5, \XMM3 # XMM3 = a0*b0 + movdqu HashKey_2_k(%arg2), \TMP4 + pclmulqdq $0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + pxor \TMP1, \TMP6 + pxor \XMM3, \XMMDst + pxor \TMP2, \XMM1 # results accumulated in TMP6, XMMDst, XMM1 + + # Multiply TMP1 * HashKey (using Karatsuba) + movdqa \XMM4, \TMP1 + pshufd $78, \XMM4, \TMP2 + pxor \XMM4, \TMP2 + movdqu HashKey(%arg2), \TMP5 + pclmulqdq $0x11, \TMP5, \TMP1 # TMP1 = a1*b1 + pclmulqdq $0x00, \TMP5, \XMM4 # XMM4 = a0*b0 + movdqu HashKey_k(%arg2), \TMP4 + pclmulqdq $0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0) + pxor \TMP1, \TMP6 + pxor \XMM4, \XMMDst + pxor \XMM1, \TMP2 + pxor \TMP6, \TMP2 + pxor \XMMDst, \TMP2 + # middle section of the temp results combined as in karatsuba algorithm + movdqa \TMP2, \TMP4 + pslldq $8, \TMP4 # left shift TMP4 2 DWs + psrldq $8, \TMP2 # right shift TMP2 2 DWs + pxor \TMP4, \XMMDst + pxor \TMP2, \TMP6 +# TMP6:XMMDst holds the result of the accumulated carry-less multiplications + # first phase of the reduction + movdqa \XMMDst, \TMP2 + movdqa \XMMDst, \TMP3 + movdqa \XMMDst, \TMP4 +# move XMMDst into TMP2, TMP3, TMP4 in order to perform 3 shifts independently + pslld $31, \TMP2 # packed right shifting << 31 + pslld $30, \TMP3 # packed right shifting << 30 + pslld $25, \TMP4 # packed right shifting << 25 + pxor \TMP3, \TMP2 # xor the shifted versions + pxor \TMP4, \TMP2 + movdqa \TMP2, \TMP7 + psrldq $4, \TMP7 # right shift TMP7 1 DW + pslldq $12, \TMP2 # left shift TMP2 3 DWs + pxor \TMP2, \XMMDst + + # second phase of the reduction + movdqa \XMMDst, \TMP2 + # make 3 copies of XMMDst for doing 3 shift operations + movdqa \XMMDst, \TMP3 + movdqa \XMMDst, \TMP4 + psrld $1, \TMP2 # packed left shift >> 1 + psrld $2, \TMP3 # packed left shift >> 2 + psrld $7, \TMP4 # packed left shift >> 7 + pxor \TMP3, \TMP2 # xor the shifted versions + pxor \TMP4, \TMP2 + pxor \TMP7, \TMP2 + pxor \TMP2, \XMMDst + pxor \TMP6, \XMMDst # reduced result is in XMMDst +.endm + + +/* Encryption of a single block +* uses eax & r10 +*/ + +.macro ENCRYPT_SINGLE_BLOCK XMM0 TMP1 + + pxor (%arg1), \XMM0 + mov keysize,%eax + shr $2,%eax # 128->4, 192->6, 256->8 + add $5,%eax # 128->9, 192->11, 256->13 + lea 16(%arg1), %r10 # get first expanded key address + +_esb_loop_\@: + MOVADQ (%r10),\TMP1 + aesenc \TMP1,\XMM0 + add $16,%r10 + sub $1,%eax + jnz _esb_loop_\@ + + MOVADQ (%r10),\TMP1 + aesenclast \TMP1,\XMM0 +.endm +/***************************************************************************** +* void aesni_gcm_dec(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary. +* struct gcm_context_data *data +* // Context data +* u8 *out, // Plaintext output. Encrypt in-place is allowed. +* const u8 *in, // Ciphertext input +* u64 plaintext_len, // Length of data in bytes for decryption. +* u8 *iv, // Pre-counter block j0: 4 byte salt (from Security Association) +* // concatenated with 8 byte Initialisation Vector (from IPSec ESP Payload) +* // concatenated with 0x00000001. 16-byte aligned pointer. +* u8 *hash_subkey, // H, the Hash sub key input. Data starts on a 16-byte boundary. +* const u8 *aad, // Additional Authentication Data (AAD) +* u64 aad_len, // Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 bytes +* u8 *auth_tag, // Authenticated Tag output. The driver will compare this to the +* // given authentication tag and only return the plaintext if they match. +* u64 auth_tag_len); // Authenticated Tag Length in bytes. Valid values are 16 +* // (most likely), 12 or 8. +* +* Assumptions: +* +* keys: +* keys are pre-expanded and aligned to 16 bytes. we are using the first +* set of 11 keys in the data structure void *aes_ctx +* +* iv: +* 0 1 2 3 +* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | Salt (From the SA) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | Initialization Vector | +* | (This is the sequence number from IPSec header) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 0x1 | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* +* +* +* AAD: +* AAD padded to 128 bits with 0 +* for example, assume AAD is a u32 vector +* +* if AAD is 8 bytes: +* AAD[3] = {A0, A1}; +* padded AAD in xmm register = {A1 A0 0 0} +* +* 0 1 2 3 +* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | SPI (A1) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 32-bit Sequence Number (A0) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 0x0 | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* +* AAD Format with 32-bit Sequence Number +* +* if AAD is 12 bytes: +* AAD[3] = {A0, A1, A2}; +* padded AAD in xmm register = {A2 A1 A0 0} +* +* 0 1 2 3 +* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | SPI (A2) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 64-bit Extended Sequence Number {A1,A0} | +* | | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 0x0 | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* +* AAD Format with 64-bit Extended Sequence Number +* +* poly = x^128 + x^127 + x^126 + x^121 + 1 +* +*****************************************************************************/ +SYM_FUNC_START(aesni_gcm_dec) + FUNC_SAVE + + GCM_INIT %arg6, arg7, arg8, arg9 + GCM_ENC_DEC dec + GCM_COMPLETE arg10, arg11 + FUNC_RESTORE + RET +SYM_FUNC_END(aesni_gcm_dec) + + +/***************************************************************************** +* void aesni_gcm_enc(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary. +* struct gcm_context_data *data +* // Context data +* u8 *out, // Ciphertext output. Encrypt in-place is allowed. +* const u8 *in, // Plaintext input +* u64 plaintext_len, // Length of data in bytes for encryption. +* u8 *iv, // Pre-counter block j0: 4 byte salt (from Security Association) +* // concatenated with 8 byte Initialisation Vector (from IPSec ESP Payload) +* // concatenated with 0x00000001. 16-byte aligned pointer. +* u8 *hash_subkey, // H, the Hash sub key input. Data starts on a 16-byte boundary. +* const u8 *aad, // Additional Authentication Data (AAD) +* u64 aad_len, // Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 bytes +* u8 *auth_tag, // Authenticated Tag output. +* u64 auth_tag_len); // Authenticated Tag Length in bytes. Valid values are 16 (most likely), +* // 12 or 8. +* +* Assumptions: +* +* keys: +* keys are pre-expanded and aligned to 16 bytes. we are using the +* first set of 11 keys in the data structure void *aes_ctx +* +* +* iv: +* 0 1 2 3 +* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | Salt (From the SA) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | Initialization Vector | +* | (This is the sequence number from IPSec header) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 0x1 | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* +* +* +* AAD: +* AAD padded to 128 bits with 0 +* for example, assume AAD is a u32 vector +* +* if AAD is 8 bytes: +* AAD[3] = {A0, A1}; +* padded AAD in xmm register = {A1 A0 0 0} +* +* 0 1 2 3 +* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | SPI (A1) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 32-bit Sequence Number (A0) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 0x0 | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* +* AAD Format with 32-bit Sequence Number +* +* if AAD is 12 bytes: +* AAD[3] = {A0, A1, A2}; +* padded AAD in xmm register = {A2 A1 A0 0} +* +* 0 1 2 3 +* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | SPI (A2) | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 64-bit Extended Sequence Number {A1,A0} | +* | | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* | 0x0 | +* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +* +* AAD Format with 64-bit Extended Sequence Number +* +* poly = x^128 + x^127 + x^126 + x^121 + 1 +***************************************************************************/ +SYM_FUNC_START(aesni_gcm_enc) + FUNC_SAVE + + GCM_INIT %arg6, arg7, arg8, arg9 + GCM_ENC_DEC enc + + GCM_COMPLETE arg10, arg11 + FUNC_RESTORE + RET +SYM_FUNC_END(aesni_gcm_enc) + +/***************************************************************************** +* void aesni_gcm_init(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary. +* struct gcm_context_data *data, +* // context data +* u8 *iv, // Pre-counter block j0: 4 byte salt (from Security Association) +* // concatenated with 8 byte Initialisation Vector (from IPSec ESP Payload) +* // concatenated with 0x00000001. 16-byte aligned pointer. +* u8 *hash_subkey, // H, the Hash sub key input. Data starts on a 16-byte boundary. +* const u8 *aad, // Additional Authentication Data (AAD) +* u64 aad_len) // Length of AAD in bytes. +*/ +SYM_FUNC_START(aesni_gcm_init) + FUNC_SAVE + GCM_INIT %arg3, %arg4,%arg5, %arg6 + FUNC_RESTORE + RET +SYM_FUNC_END(aesni_gcm_init) + +/***************************************************************************** +* void aesni_gcm_enc_update(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary. +* struct gcm_context_data *data, +* // context data +* u8 *out, // Ciphertext output. Encrypt in-place is allowed. +* const u8 *in, // Plaintext input +* u64 plaintext_len, // Length of data in bytes for encryption. +*/ +SYM_FUNC_START(aesni_gcm_enc_update) + FUNC_SAVE + GCM_ENC_DEC enc + FUNC_RESTORE + RET +SYM_FUNC_END(aesni_gcm_enc_update) + +/***************************************************************************** +* void aesni_gcm_dec_update(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary. +* struct gcm_context_data *data, +* // context data +* u8 *out, // Ciphertext output. Encrypt in-place is allowed. +* const u8 *in, // Plaintext input +* u64 plaintext_len, // Length of data in bytes for encryption. +*/ +SYM_FUNC_START(aesni_gcm_dec_update) + FUNC_SAVE + GCM_ENC_DEC dec + FUNC_RESTORE + RET +SYM_FUNC_END(aesni_gcm_dec_update) + +/***************************************************************************** +* void aesni_gcm_finalize(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary. +* struct gcm_context_data *data, +* // context data +* u8 *auth_tag, // Authenticated Tag output. +* u64 auth_tag_len); // Authenticated Tag Length in bytes. Valid values are 16 (most likely), +* // 12 or 8. +*/ +SYM_FUNC_START(aesni_gcm_finalize) + FUNC_SAVE + GCM_COMPLETE %arg3 %arg4 + FUNC_RESTORE + RET +SYM_FUNC_END(aesni_gcm_finalize) + +#endif + +SYM_FUNC_START_LOCAL(_key_expansion_256a) + pshufd $0b11111111, %xmm1, %xmm1 + shufps $0b00010000, %xmm0, %xmm4 + pxor %xmm4, %xmm0 + shufps $0b10001100, %xmm0, %xmm4 + pxor %xmm4, %xmm0 + pxor %xmm1, %xmm0 + movaps %xmm0, (TKEYP) + add $0x10, TKEYP + RET +SYM_FUNC_END(_key_expansion_256a) +SYM_FUNC_ALIAS_LOCAL(_key_expansion_128, _key_expansion_256a) + +SYM_FUNC_START_LOCAL(_key_expansion_192a) + pshufd $0b01010101, %xmm1, %xmm1 + shufps $0b00010000, %xmm0, %xmm4 + pxor %xmm4, %xmm0 + shufps $0b10001100, %xmm0, %xmm4 + pxor %xmm4, %xmm0 + pxor %xmm1, %xmm0 + + movaps %xmm2, %xmm5 + movaps %xmm2, %xmm6 + pslldq $4, %xmm5 + pshufd $0b11111111, %xmm0, %xmm3 + pxor %xmm3, %xmm2 + pxor %xmm5, %xmm2 + + movaps %xmm0, %xmm1 + shufps $0b01000100, %xmm0, %xmm6 + movaps %xmm6, (TKEYP) + shufps $0b01001110, %xmm2, %xmm1 + movaps %xmm1, 0x10(TKEYP) + add $0x20, TKEYP + RET +SYM_FUNC_END(_key_expansion_192a) + +SYM_FUNC_START_LOCAL(_key_expansion_192b) + pshufd $0b01010101, %xmm1, %xmm1 + shufps $0b00010000, %xmm0, %xmm4 + pxor %xmm4, %xmm0 + shufps $0b10001100, %xmm0, %xmm4 + pxor %xmm4, %xmm0 + pxor %xmm1, %xmm0 + + movaps %xmm2, %xmm5 + pslldq $4, %xmm5 + pshufd $0b11111111, %xmm0, %xmm3 + pxor %xmm3, %xmm2 + pxor %xmm5, %xmm2 + + movaps %xmm0, (TKEYP) + add $0x10, TKEYP + RET +SYM_FUNC_END(_key_expansion_192b) + +SYM_FUNC_START_LOCAL(_key_expansion_256b) + pshufd $0b10101010, %xmm1, %xmm1 + shufps $0b00010000, %xmm2, %xmm4 + pxor %xmm4, %xmm2 + shufps $0b10001100, %xmm2, %xmm4 + pxor %xmm4, %xmm2 + pxor %xmm1, %xmm2 + movaps %xmm2, (TKEYP) + add $0x10, TKEYP + RET +SYM_FUNC_END(_key_expansion_256b) + +/* + * int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, + * unsigned int key_len) + */ +SYM_FUNC_START(aesni_set_key) + FRAME_BEGIN +#ifndef __x86_64__ + pushl KEYP + movl (FRAME_OFFSET+8)(%esp), KEYP # ctx + movl (FRAME_OFFSET+12)(%esp), UKEYP # in_key + movl (FRAME_OFFSET+16)(%esp), %edx # key_len +#endif + movups (UKEYP), %xmm0 # user key (first 16 bytes) + movaps %xmm0, (KEYP) + lea 0x10(KEYP), TKEYP # key addr + movl %edx, 480(KEYP) + pxor %xmm4, %xmm4 # xmm4 is assumed 0 in _key_expansion_x + cmp $24, %dl + jb .Lenc_key128 + je .Lenc_key192 + movups 0x10(UKEYP), %xmm2 # other user key + movaps %xmm2, (TKEYP) + add $0x10, TKEYP + aeskeygenassist $0x1, %xmm2, %xmm1 # round 1 + call _key_expansion_256a + aeskeygenassist $0x1, %xmm0, %xmm1 + call _key_expansion_256b + aeskeygenassist $0x2, %xmm2, %xmm1 # round 2 + call _key_expansion_256a + aeskeygenassist $0x2, %xmm0, %xmm1 + call _key_expansion_256b + aeskeygenassist $0x4, %xmm2, %xmm1 # round 3 + call _key_expansion_256a + aeskeygenassist $0x4, %xmm0, %xmm1 + call _key_expansion_256b + aeskeygenassist $0x8, %xmm2, %xmm1 # round 4 + call _key_expansion_256a + aeskeygenassist $0x8, %xmm0, %xmm1 + call _key_expansion_256b + aeskeygenassist $0x10, %xmm2, %xmm1 # round 5 + call _key_expansion_256a + aeskeygenassist $0x10, %xmm0, %xmm1 + call _key_expansion_256b + aeskeygenassist $0x20, %xmm2, %xmm1 # round 6 + call _key_expansion_256a + aeskeygenassist $0x20, %xmm0, %xmm1 + call _key_expansion_256b + aeskeygenassist $0x40, %xmm2, %xmm1 # round 7 + call _key_expansion_256a + jmp .Ldec_key +.Lenc_key192: + movq 0x10(UKEYP), %xmm2 # other user key + aeskeygenassist $0x1, %xmm2, %xmm1 # round 1 + call _key_expansion_192a + aeskeygenassist $0x2, %xmm2, %xmm1 # round 2 + call _key_expansion_192b + aeskeygenassist $0x4, %xmm2, %xmm1 # round 3 + call _key_expansion_192a + aeskeygenassist $0x8, %xmm2, %xmm1 # round 4 + call _key_expansion_192b + aeskeygenassist $0x10, %xmm2, %xmm1 # round 5 + call _key_expansion_192a + aeskeygenassist $0x20, %xmm2, %xmm1 # round 6 + call _key_expansion_192b + aeskeygenassist $0x40, %xmm2, %xmm1 # round 7 + call _key_expansion_192a + aeskeygenassist $0x80, %xmm2, %xmm1 # round 8 + call _key_expansion_192b + jmp .Ldec_key +.Lenc_key128: + aeskeygenassist $0x1, %xmm0, %xmm1 # round 1 + call _key_expansion_128 + aeskeygenassist $0x2, %xmm0, %xmm1 # round 2 + call _key_expansion_128 + aeskeygenassist $0x4, %xmm0, %xmm1 # round 3 + call _key_expansion_128 + aeskeygenassist $0x8, %xmm0, %xmm1 # round 4 + call _key_expansion_128 + aeskeygenassist $0x10, %xmm0, %xmm1 # round 5 + call _key_expansion_128 + aeskeygenassist $0x20, %xmm0, %xmm1 # round 6 + call _key_expansion_128 + aeskeygenassist $0x40, %xmm0, %xmm1 # round 7 + call _key_expansion_128 + aeskeygenassist $0x80, %xmm0, %xmm1 # round 8 + call _key_expansion_128 + aeskeygenassist $0x1b, %xmm0, %xmm1 # round 9 + call _key_expansion_128 + aeskeygenassist $0x36, %xmm0, %xmm1 # round 10 + call _key_expansion_128 +.Ldec_key: + sub $0x10, TKEYP + movaps (KEYP), %xmm0 + movaps (TKEYP), %xmm1 + movaps %xmm0, 240(TKEYP) + movaps %xmm1, 240(KEYP) + add $0x10, KEYP + lea 240-16(TKEYP), UKEYP +.align 4 +.Ldec_key_loop: + movaps (KEYP), %xmm0 + aesimc %xmm0, %xmm1 + movaps %xmm1, (UKEYP) + add $0x10, KEYP + sub $0x10, UKEYP + cmp TKEYP, KEYP + jb .Ldec_key_loop + xor AREG, AREG +#ifndef __x86_64__ + popl KEYP +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_set_key) + +/* + * void aesni_enc(const void *ctx, u8 *dst, const u8 *src) + */ +SYM_FUNC_START(aesni_enc) + FRAME_BEGIN +#ifndef __x86_64__ + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+12)(%esp), KEYP # ctx + movl (FRAME_OFFSET+16)(%esp), OUTP # dst + movl (FRAME_OFFSET+20)(%esp), INP # src +#endif + movl 480(KEYP), KLEN # key length + movups (INP), STATE # input + call _aesni_enc1 + movups STATE, (OUTP) # output +#ifndef __x86_64__ + popl KLEN + popl KEYP +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_enc) + +/* + * _aesni_enc1: internal ABI + * input: + * KEYP: key struct pointer + * KLEN: round count + * STATE: initial state (input) + * output: + * STATE: finial state (output) + * changed: + * KEY + * TKEYP (T1) + */ +SYM_FUNC_START_LOCAL(_aesni_enc1) + movaps (KEYP), KEY # key + mov KEYP, TKEYP + pxor KEY, STATE # round 0 + add $0x30, TKEYP + cmp $24, KLEN + jb .Lenc128 + lea 0x20(TKEYP), TKEYP + je .Lenc192 + add $0x20, TKEYP + movaps -0x60(TKEYP), KEY + aesenc KEY, STATE + movaps -0x50(TKEYP), KEY + aesenc KEY, STATE +.align 4 +.Lenc192: + movaps -0x40(TKEYP), KEY + aesenc KEY, STATE + movaps -0x30(TKEYP), KEY + aesenc KEY, STATE +.align 4 +.Lenc128: + movaps -0x20(TKEYP), KEY + aesenc KEY, STATE + movaps -0x10(TKEYP), KEY + aesenc KEY, STATE + movaps (TKEYP), KEY + aesenc KEY, STATE + movaps 0x10(TKEYP), KEY + aesenc KEY, STATE + movaps 0x20(TKEYP), KEY + aesenc KEY, STATE + movaps 0x30(TKEYP), KEY + aesenc KEY, STATE + movaps 0x40(TKEYP), KEY + aesenc KEY, STATE + movaps 0x50(TKEYP), KEY + aesenc KEY, STATE + movaps 0x60(TKEYP), KEY + aesenc KEY, STATE + movaps 0x70(TKEYP), KEY + aesenclast KEY, STATE + RET +SYM_FUNC_END(_aesni_enc1) + +/* + * _aesni_enc4: internal ABI + * input: + * KEYP: key struct pointer + * KLEN: round count + * STATE1: initial state (input) + * STATE2 + * STATE3 + * STATE4 + * output: + * STATE1: finial state (output) + * STATE2 + * STATE3 + * STATE4 + * changed: + * KEY + * TKEYP (T1) + */ +SYM_FUNC_START_LOCAL(_aesni_enc4) + movaps (KEYP), KEY # key + mov KEYP, TKEYP + pxor KEY, STATE1 # round 0 + pxor KEY, STATE2 + pxor KEY, STATE3 + pxor KEY, STATE4 + add $0x30, TKEYP + cmp $24, KLEN + jb .L4enc128 + lea 0x20(TKEYP), TKEYP + je .L4enc192 + add $0x20, TKEYP + movaps -0x60(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps -0x50(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 +#.align 4 +.L4enc192: + movaps -0x40(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps -0x30(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 +#.align 4 +.L4enc128: + movaps -0x20(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps -0x10(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps (TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps 0x10(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps 0x20(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps 0x30(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps 0x40(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps 0x50(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps 0x60(TKEYP), KEY + aesenc KEY, STATE1 + aesenc KEY, STATE2 + aesenc KEY, STATE3 + aesenc KEY, STATE4 + movaps 0x70(TKEYP), KEY + aesenclast KEY, STATE1 # last round + aesenclast KEY, STATE2 + aesenclast KEY, STATE3 + aesenclast KEY, STATE4 + RET +SYM_FUNC_END(_aesni_enc4) + +/* + * void aesni_dec (const void *ctx, u8 *dst, const u8 *src) + */ +SYM_FUNC_START(aesni_dec) + FRAME_BEGIN +#ifndef __x86_64__ + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+12)(%esp), KEYP # ctx + movl (FRAME_OFFSET+16)(%esp), OUTP # dst + movl (FRAME_OFFSET+20)(%esp), INP # src +#endif + mov 480(KEYP), KLEN # key length + add $240, KEYP + movups (INP), STATE # input + call _aesni_dec1 + movups STATE, (OUTP) #output +#ifndef __x86_64__ + popl KLEN + popl KEYP +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_dec) + +/* + * _aesni_dec1: internal ABI + * input: + * KEYP: key struct pointer + * KLEN: key length + * STATE: initial state (input) + * output: + * STATE: finial state (output) + * changed: + * KEY + * TKEYP (T1) + */ +SYM_FUNC_START_LOCAL(_aesni_dec1) + movaps (KEYP), KEY # key + mov KEYP, TKEYP + pxor KEY, STATE # round 0 + add $0x30, TKEYP + cmp $24, KLEN + jb .Ldec128 + lea 0x20(TKEYP), TKEYP + je .Ldec192 + add $0x20, TKEYP + movaps -0x60(TKEYP), KEY + aesdec KEY, STATE + movaps -0x50(TKEYP), KEY + aesdec KEY, STATE +.align 4 +.Ldec192: + movaps -0x40(TKEYP), KEY + aesdec KEY, STATE + movaps -0x30(TKEYP), KEY + aesdec KEY, STATE +.align 4 +.Ldec128: + movaps -0x20(TKEYP), KEY + aesdec KEY, STATE + movaps -0x10(TKEYP), KEY + aesdec KEY, STATE + movaps (TKEYP), KEY + aesdec KEY, STATE + movaps 0x10(TKEYP), KEY + aesdec KEY, STATE + movaps 0x20(TKEYP), KEY + aesdec KEY, STATE + movaps 0x30(TKEYP), KEY + aesdec KEY, STATE + movaps 0x40(TKEYP), KEY + aesdec KEY, STATE + movaps 0x50(TKEYP), KEY + aesdec KEY, STATE + movaps 0x60(TKEYP), KEY + aesdec KEY, STATE + movaps 0x70(TKEYP), KEY + aesdeclast KEY, STATE + RET +SYM_FUNC_END(_aesni_dec1) + +/* + * _aesni_dec4: internal ABI + * input: + * KEYP: key struct pointer + * KLEN: key length + * STATE1: initial state (input) + * STATE2 + * STATE3 + * STATE4 + * output: + * STATE1: finial state (output) + * STATE2 + * STATE3 + * STATE4 + * changed: + * KEY + * TKEYP (T1) + */ +SYM_FUNC_START_LOCAL(_aesni_dec4) + movaps (KEYP), KEY # key + mov KEYP, TKEYP + pxor KEY, STATE1 # round 0 + pxor KEY, STATE2 + pxor KEY, STATE3 + pxor KEY, STATE4 + add $0x30, TKEYP + cmp $24, KLEN + jb .L4dec128 + lea 0x20(TKEYP), TKEYP + je .L4dec192 + add $0x20, TKEYP + movaps -0x60(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps -0x50(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 +.align 4 +.L4dec192: + movaps -0x40(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps -0x30(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 +.align 4 +.L4dec128: + movaps -0x20(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps -0x10(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps (TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps 0x10(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps 0x20(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps 0x30(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps 0x40(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps 0x50(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps 0x60(TKEYP), KEY + aesdec KEY, STATE1 + aesdec KEY, STATE2 + aesdec KEY, STATE3 + aesdec KEY, STATE4 + movaps 0x70(TKEYP), KEY + aesdeclast KEY, STATE1 # last round + aesdeclast KEY, STATE2 + aesdeclast KEY, STATE3 + aesdeclast KEY, STATE4 + RET +SYM_FUNC_END(_aesni_dec4) + +/* + * void aesni_ecb_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src, + * size_t len) + */ +SYM_FUNC_START(aesni_ecb_enc) + FRAME_BEGIN +#ifndef __x86_64__ + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+16)(%esp), KEYP # ctx + movl (FRAME_OFFSET+20)(%esp), OUTP # dst + movl (FRAME_OFFSET+24)(%esp), INP # src + movl (FRAME_OFFSET+28)(%esp), LEN # len +#endif + test LEN, LEN # check length + jz .Lecb_enc_ret + mov 480(KEYP), KLEN + cmp $16, LEN + jb .Lecb_enc_ret + cmp $64, LEN + jb .Lecb_enc_loop1 +.align 4 +.Lecb_enc_loop4: + movups (INP), STATE1 + movups 0x10(INP), STATE2 + movups 0x20(INP), STATE3 + movups 0x30(INP), STATE4 + call _aesni_enc4 + movups STATE1, (OUTP) + movups STATE2, 0x10(OUTP) + movups STATE3, 0x20(OUTP) + movups STATE4, 0x30(OUTP) + sub $64, LEN + add $64, INP + add $64, OUTP + cmp $64, LEN + jge .Lecb_enc_loop4 + cmp $16, LEN + jb .Lecb_enc_ret +.align 4 +.Lecb_enc_loop1: + movups (INP), STATE1 + call _aesni_enc1 + movups STATE1, (OUTP) + sub $16, LEN + add $16, INP + add $16, OUTP + cmp $16, LEN + jge .Lecb_enc_loop1 +.Lecb_enc_ret: +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_ecb_enc) + +/* + * void aesni_ecb_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src, + * size_t len); + */ +SYM_FUNC_START(aesni_ecb_dec) + FRAME_BEGIN +#ifndef __x86_64__ + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+16)(%esp), KEYP # ctx + movl (FRAME_OFFSET+20)(%esp), OUTP # dst + movl (FRAME_OFFSET+24)(%esp), INP # src + movl (FRAME_OFFSET+28)(%esp), LEN # len +#endif + test LEN, LEN + jz .Lecb_dec_ret + mov 480(KEYP), KLEN + add $240, KEYP + cmp $16, LEN + jb .Lecb_dec_ret + cmp $64, LEN + jb .Lecb_dec_loop1 +.align 4 +.Lecb_dec_loop4: + movups (INP), STATE1 + movups 0x10(INP), STATE2 + movups 0x20(INP), STATE3 + movups 0x30(INP), STATE4 + call _aesni_dec4 + movups STATE1, (OUTP) + movups STATE2, 0x10(OUTP) + movups STATE3, 0x20(OUTP) + movups STATE4, 0x30(OUTP) + sub $64, LEN + add $64, INP + add $64, OUTP + cmp $64, LEN + jge .Lecb_dec_loop4 + cmp $16, LEN + jb .Lecb_dec_ret +.align 4 +.Lecb_dec_loop1: + movups (INP), STATE1 + call _aesni_dec1 + movups STATE1, (OUTP) + sub $16, LEN + add $16, INP + add $16, OUTP + cmp $16, LEN + jge .Lecb_dec_loop1 +.Lecb_dec_ret: +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_ecb_dec) + +/* + * void aesni_cbc_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src, + * size_t len, u8 *iv) + */ +SYM_FUNC_START(aesni_cbc_enc) + FRAME_BEGIN +#ifndef __x86_64__ + pushl IVP + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+20)(%esp), KEYP # ctx + movl (FRAME_OFFSET+24)(%esp), OUTP # dst + movl (FRAME_OFFSET+28)(%esp), INP # src + movl (FRAME_OFFSET+32)(%esp), LEN # len + movl (FRAME_OFFSET+36)(%esp), IVP # iv +#endif + cmp $16, LEN + jb .Lcbc_enc_ret + mov 480(KEYP), KLEN + movups (IVP), STATE # load iv as initial state +.align 4 +.Lcbc_enc_loop: + movups (INP), IN # load input + pxor IN, STATE + call _aesni_enc1 + movups STATE, (OUTP) # store output + sub $16, LEN + add $16, INP + add $16, OUTP + cmp $16, LEN + jge .Lcbc_enc_loop + movups STATE, (IVP) +.Lcbc_enc_ret: +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN + popl IVP +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_cbc_enc) + +/* + * void aesni_cbc_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src, + * size_t len, u8 *iv) + */ +SYM_FUNC_START(aesni_cbc_dec) + FRAME_BEGIN +#ifndef __x86_64__ + pushl IVP + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+20)(%esp), KEYP # ctx + movl (FRAME_OFFSET+24)(%esp), OUTP # dst + movl (FRAME_OFFSET+28)(%esp), INP # src + movl (FRAME_OFFSET+32)(%esp), LEN # len + movl (FRAME_OFFSET+36)(%esp), IVP # iv +#endif + cmp $16, LEN + jb .Lcbc_dec_just_ret + mov 480(KEYP), KLEN + add $240, KEYP + movups (IVP), IV + cmp $64, LEN + jb .Lcbc_dec_loop1 +.align 4 +.Lcbc_dec_loop4: + movups (INP), IN1 + movaps IN1, STATE1 + movups 0x10(INP), IN2 + movaps IN2, STATE2 +#ifdef __x86_64__ + movups 0x20(INP), IN3 + movaps IN3, STATE3 + movups 0x30(INP), IN4 + movaps IN4, STATE4 +#else + movups 0x20(INP), IN1 + movaps IN1, STATE3 + movups 0x30(INP), IN2 + movaps IN2, STATE4 +#endif + call _aesni_dec4 + pxor IV, STATE1 +#ifdef __x86_64__ + pxor IN1, STATE2 + pxor IN2, STATE3 + pxor IN3, STATE4 + movaps IN4, IV +#else + pxor IN1, STATE4 + movaps IN2, IV + movups (INP), IN1 + pxor IN1, STATE2 + movups 0x10(INP), IN2 + pxor IN2, STATE3 +#endif + movups STATE1, (OUTP) + movups STATE2, 0x10(OUTP) + movups STATE3, 0x20(OUTP) + movups STATE4, 0x30(OUTP) + sub $64, LEN + add $64, INP + add $64, OUTP + cmp $64, LEN + jge .Lcbc_dec_loop4 + cmp $16, LEN + jb .Lcbc_dec_ret +.align 4 +.Lcbc_dec_loop1: + movups (INP), IN + movaps IN, STATE + call _aesni_dec1 + pxor IV, STATE + movups STATE, (OUTP) + movaps IN, IV + sub $16, LEN + add $16, INP + add $16, OUTP + cmp $16, LEN + jge .Lcbc_dec_loop1 +.Lcbc_dec_ret: + movups IV, (IVP) +.Lcbc_dec_just_ret: +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN + popl IVP +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_cbc_dec) + +/* + * void aesni_cts_cbc_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src, + * size_t len, u8 *iv) + */ +SYM_FUNC_START(aesni_cts_cbc_enc) + FRAME_BEGIN +#ifndef __x86_64__ + pushl IVP + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+20)(%esp), KEYP # ctx + movl (FRAME_OFFSET+24)(%esp), OUTP # dst + movl (FRAME_OFFSET+28)(%esp), INP # src + movl (FRAME_OFFSET+32)(%esp), LEN # len + movl (FRAME_OFFSET+36)(%esp), IVP # iv + lea .Lcts_permute_table, T1 +#else + lea .Lcts_permute_table(%rip), T1 +#endif + mov 480(KEYP), KLEN + movups (IVP), STATE + sub $16, LEN + mov T1, IVP + add $32, IVP + add LEN, T1 + sub LEN, IVP + movups (T1), %xmm4 + movups (IVP), %xmm5 + + movups (INP), IN1 + add LEN, INP + movups (INP), IN2 + + pxor IN1, STATE + call _aesni_enc1 + + pshufb %xmm5, IN2 + pxor STATE, IN2 + pshufb %xmm4, STATE + add OUTP, LEN + movups STATE, (LEN) + + movaps IN2, STATE + call _aesni_enc1 + movups STATE, (OUTP) + +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN + popl IVP +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_cts_cbc_enc) + +/* + * void aesni_cts_cbc_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src, + * size_t len, u8 *iv) + */ +SYM_FUNC_START(aesni_cts_cbc_dec) + FRAME_BEGIN +#ifndef __x86_64__ + pushl IVP + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+20)(%esp), KEYP # ctx + movl (FRAME_OFFSET+24)(%esp), OUTP # dst + movl (FRAME_OFFSET+28)(%esp), INP # src + movl (FRAME_OFFSET+32)(%esp), LEN # len + movl (FRAME_OFFSET+36)(%esp), IVP # iv + lea .Lcts_permute_table, T1 +#else + lea .Lcts_permute_table(%rip), T1 +#endif + mov 480(KEYP), KLEN + add $240, KEYP + movups (IVP), IV + sub $16, LEN + mov T1, IVP + add $32, IVP + add LEN, T1 + sub LEN, IVP + movups (T1), %xmm4 + + movups (INP), STATE + add LEN, INP + movups (INP), IN1 + + call _aesni_dec1 + movaps STATE, IN2 + pshufb %xmm4, STATE + pxor IN1, STATE + + add OUTP, LEN + movups STATE, (LEN) + + movups (IVP), %xmm0 + pshufb %xmm0, IN1 + pblendvb IN2, IN1 + movaps IN1, STATE + call _aesni_dec1 + + pxor IV, STATE + movups STATE, (OUTP) + +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN + popl IVP +#endif + FRAME_END + RET +SYM_FUNC_END(aesni_cts_cbc_dec) + +.pushsection .rodata +.align 16 +.Lcts_permute_table: + .byte 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 + .byte 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 + .byte 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 + .byte 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f + .byte 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 + .byte 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 +#ifdef __x86_64__ +.Lbswap_mask: + .byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 +#endif +.popsection + +#ifdef __x86_64__ +/* + * _aesni_inc_init: internal ABI + * setup registers used by _aesni_inc + * input: + * IV + * output: + * CTR: == IV, in little endian + * TCTR_LOW: == lower qword of CTR + * INC: == 1, in little endian + * BSWAP_MASK == endian swapping mask + */ +SYM_FUNC_START_LOCAL(_aesni_inc_init) + movaps .Lbswap_mask, BSWAP_MASK + movaps IV, CTR + pshufb BSWAP_MASK, CTR + mov $1, TCTR_LOW + movq TCTR_LOW, INC + movq CTR, TCTR_LOW + RET +SYM_FUNC_END(_aesni_inc_init) + +/* + * _aesni_inc: internal ABI + * Increase IV by 1, IV is in big endian + * input: + * IV + * CTR: == IV, in little endian + * TCTR_LOW: == lower qword of CTR + * INC: == 1, in little endian + * BSWAP_MASK == endian swapping mask + * output: + * IV: Increase by 1 + * changed: + * CTR: == output IV, in little endian + * TCTR_LOW: == lower qword of CTR + */ +SYM_FUNC_START_LOCAL(_aesni_inc) + paddq INC, CTR + add $1, TCTR_LOW + jnc .Linc_low + pslldq $8, INC + paddq INC, CTR + psrldq $8, INC +.Linc_low: + movaps CTR, IV + pshufb BSWAP_MASK, IV + RET +SYM_FUNC_END(_aesni_inc) + +/* + * void aesni_ctr_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src, + * size_t len, u8 *iv) + */ +SYM_FUNC_START(aesni_ctr_enc) + FRAME_BEGIN + cmp $16, LEN + jb .Lctr_enc_just_ret + mov 480(KEYP), KLEN + movups (IVP), IV + call _aesni_inc_init + cmp $64, LEN + jb .Lctr_enc_loop1 +.align 4 +.Lctr_enc_loop4: + movaps IV, STATE1 + call _aesni_inc + movups (INP), IN1 + movaps IV, STATE2 + call _aesni_inc + movups 0x10(INP), IN2 + movaps IV, STATE3 + call _aesni_inc + movups 0x20(INP), IN3 + movaps IV, STATE4 + call _aesni_inc + movups 0x30(INP), IN4 + call _aesni_enc4 + pxor IN1, STATE1 + movups STATE1, (OUTP) + pxor IN2, STATE2 + movups STATE2, 0x10(OUTP) + pxor IN3, STATE3 + movups STATE3, 0x20(OUTP) + pxor IN4, STATE4 + movups STATE4, 0x30(OUTP) + sub $64, LEN + add $64, INP + add $64, OUTP + cmp $64, LEN + jge .Lctr_enc_loop4 + cmp $16, LEN + jb .Lctr_enc_ret +.align 4 +.Lctr_enc_loop1: + movaps IV, STATE + call _aesni_inc + movups (INP), IN + call _aesni_enc1 + pxor IN, STATE + movups STATE, (OUTP) + sub $16, LEN + add $16, INP + add $16, OUTP + cmp $16, LEN + jge .Lctr_enc_loop1 +.Lctr_enc_ret: + movups IV, (IVP) +.Lctr_enc_just_ret: + FRAME_END + RET +SYM_FUNC_END(aesni_ctr_enc) + +#endif + +.section .rodata.cst16.gf128mul_x_ble_mask, "aM", @progbits, 16 +.align 16 +.Lgf128mul_x_ble_mask: + .octa 0x00000000000000010000000000000087 +.previous + +/* + * _aesni_gf128mul_x_ble: internal ABI + * Multiply in GF(2^128) for XTS IVs + * input: + * IV: current IV + * GF128MUL_MASK == mask with 0x87 and 0x01 + * output: + * IV: next IV + * changed: + * CTR: == temporary value + */ +#define _aesni_gf128mul_x_ble() \ + pshufd $0x13, IV, KEY; \ + paddq IV, IV; \ + psrad $31, KEY; \ + pand GF128MUL_MASK, KEY; \ + pxor KEY, IV; + +/* + * void aesni_xts_encrypt(const struct crypto_aes_ctx *ctx, u8 *dst, + * const u8 *src, unsigned int len, le128 *iv) + */ +SYM_FUNC_START(aesni_xts_encrypt) + FRAME_BEGIN +#ifndef __x86_64__ + pushl IVP + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+20)(%esp), KEYP # ctx + movl (FRAME_OFFSET+24)(%esp), OUTP # dst + movl (FRAME_OFFSET+28)(%esp), INP # src + movl (FRAME_OFFSET+32)(%esp), LEN # len + movl (FRAME_OFFSET+36)(%esp), IVP # iv + movdqa .Lgf128mul_x_ble_mask, GF128MUL_MASK +#else + movdqa .Lgf128mul_x_ble_mask(%rip), GF128MUL_MASK +#endif + movups (IVP), IV + + mov 480(KEYP), KLEN + +.Lxts_enc_loop4: + sub $64, LEN + jl .Lxts_enc_1x + + movdqa IV, STATE1 + movdqu 0x00(INP), IN + pxor IN, STATE1 + movdqu IV, 0x00(OUTP) + + _aesni_gf128mul_x_ble() + movdqa IV, STATE2 + movdqu 0x10(INP), IN + pxor IN, STATE2 + movdqu IV, 0x10(OUTP) + + _aesni_gf128mul_x_ble() + movdqa IV, STATE3 + movdqu 0x20(INP), IN + pxor IN, STATE3 + movdqu IV, 0x20(OUTP) + + _aesni_gf128mul_x_ble() + movdqa IV, STATE4 + movdqu 0x30(INP), IN + pxor IN, STATE4 + movdqu IV, 0x30(OUTP) + + call _aesni_enc4 + + movdqu 0x00(OUTP), IN + pxor IN, STATE1 + movdqu STATE1, 0x00(OUTP) + + movdqu 0x10(OUTP), IN + pxor IN, STATE2 + movdqu STATE2, 0x10(OUTP) + + movdqu 0x20(OUTP), IN + pxor IN, STATE3 + movdqu STATE3, 0x20(OUTP) + + movdqu 0x30(OUTP), IN + pxor IN, STATE4 + movdqu STATE4, 0x30(OUTP) + + _aesni_gf128mul_x_ble() + + add $64, INP + add $64, OUTP + test LEN, LEN + jnz .Lxts_enc_loop4 + +.Lxts_enc_ret_iv: + movups IV, (IVP) + +.Lxts_enc_ret: +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN + popl IVP +#endif + FRAME_END + RET + +.Lxts_enc_1x: + add $64, LEN + jz .Lxts_enc_ret_iv + sub $16, LEN + jl .Lxts_enc_cts4 + +.Lxts_enc_loop1: + movdqu (INP), STATE + pxor IV, STATE + call _aesni_enc1 + pxor IV, STATE + _aesni_gf128mul_x_ble() + + test LEN, LEN + jz .Lxts_enc_out + + add $16, INP + sub $16, LEN + jl .Lxts_enc_cts1 + + movdqu STATE, (OUTP) + add $16, OUTP + jmp .Lxts_enc_loop1 + +.Lxts_enc_out: + movdqu STATE, (OUTP) + jmp .Lxts_enc_ret_iv + +.Lxts_enc_cts4: + movdqa STATE4, STATE + sub $16, OUTP + +.Lxts_enc_cts1: +#ifndef __x86_64__ + lea .Lcts_permute_table, T1 +#else + lea .Lcts_permute_table(%rip), T1 +#endif + add LEN, INP /* rewind input pointer */ + add $16, LEN /* # bytes in final block */ + movups (INP), IN1 + + mov T1, IVP + add $32, IVP + add LEN, T1 + sub LEN, IVP + add OUTP, LEN + + movups (T1), %xmm4 + movaps STATE, IN2 + pshufb %xmm4, STATE + movups STATE, (LEN) + + movups (IVP), %xmm0 + pshufb %xmm0, IN1 + pblendvb IN2, IN1 + movaps IN1, STATE + + pxor IV, STATE + call _aesni_enc1 + pxor IV, STATE + + movups STATE, (OUTP) + jmp .Lxts_enc_ret +SYM_FUNC_END(aesni_xts_encrypt) + +/* + * void aesni_xts_decrypt(const struct crypto_aes_ctx *ctx, u8 *dst, + * const u8 *src, unsigned int len, le128 *iv) + */ +SYM_FUNC_START(aesni_xts_decrypt) + FRAME_BEGIN +#ifndef __x86_64__ + pushl IVP + pushl LEN + pushl KEYP + pushl KLEN + movl (FRAME_OFFSET+20)(%esp), KEYP # ctx + movl (FRAME_OFFSET+24)(%esp), OUTP # dst + movl (FRAME_OFFSET+28)(%esp), INP # src + movl (FRAME_OFFSET+32)(%esp), LEN # len + movl (FRAME_OFFSET+36)(%esp), IVP # iv + movdqa .Lgf128mul_x_ble_mask, GF128MUL_MASK +#else + movdqa .Lgf128mul_x_ble_mask(%rip), GF128MUL_MASK +#endif + movups (IVP), IV + + mov 480(KEYP), KLEN + add $240, KEYP + + test $15, LEN + jz .Lxts_dec_loop4 + sub $16, LEN + +.Lxts_dec_loop4: + sub $64, LEN + jl .Lxts_dec_1x + + movdqa IV, STATE1 + movdqu 0x00(INP), IN + pxor IN, STATE1 + movdqu IV, 0x00(OUTP) + + _aesni_gf128mul_x_ble() + movdqa IV, STATE2 + movdqu 0x10(INP), IN + pxor IN, STATE2 + movdqu IV, 0x10(OUTP) + + _aesni_gf128mul_x_ble() + movdqa IV, STATE3 + movdqu 0x20(INP), IN + pxor IN, STATE3 + movdqu IV, 0x20(OUTP) + + _aesni_gf128mul_x_ble() + movdqa IV, STATE4 + movdqu 0x30(INP), IN + pxor IN, STATE4 + movdqu IV, 0x30(OUTP) + + call _aesni_dec4 + + movdqu 0x00(OUTP), IN + pxor IN, STATE1 + movdqu STATE1, 0x00(OUTP) + + movdqu 0x10(OUTP), IN + pxor IN, STATE2 + movdqu STATE2, 0x10(OUTP) + + movdqu 0x20(OUTP), IN + pxor IN, STATE3 + movdqu STATE3, 0x20(OUTP) + + movdqu 0x30(OUTP), IN + pxor IN, STATE4 + movdqu STATE4, 0x30(OUTP) + + _aesni_gf128mul_x_ble() + + add $64, INP + add $64, OUTP + test LEN, LEN + jnz .Lxts_dec_loop4 + +.Lxts_dec_ret_iv: + movups IV, (IVP) + +.Lxts_dec_ret: +#ifndef __x86_64__ + popl KLEN + popl KEYP + popl LEN + popl IVP +#endif + FRAME_END + RET + +.Lxts_dec_1x: + add $64, LEN + jz .Lxts_dec_ret_iv + +.Lxts_dec_loop1: + movdqu (INP), STATE + + add $16, INP + sub $16, LEN + jl .Lxts_dec_cts1 + + pxor IV, STATE + call _aesni_dec1 + pxor IV, STATE + _aesni_gf128mul_x_ble() + + test LEN, LEN + jz .Lxts_dec_out + + movdqu STATE, (OUTP) + add $16, OUTP + jmp .Lxts_dec_loop1 + +.Lxts_dec_out: + movdqu STATE, (OUTP) + jmp .Lxts_dec_ret_iv + +.Lxts_dec_cts1: + movdqa IV, STATE4 + _aesni_gf128mul_x_ble() + + pxor IV, STATE + call _aesni_dec1 + pxor IV, STATE + +#ifndef __x86_64__ + lea .Lcts_permute_table, T1 +#else + lea .Lcts_permute_table(%rip), T1 +#endif + add LEN, INP /* rewind input pointer */ + add $16, LEN /* # bytes in final block */ + movups (INP), IN1 + + mov T1, IVP + add $32, IVP + add LEN, T1 + sub LEN, IVP + add OUTP, LEN + + movups (T1), %xmm4 + movaps STATE, IN2 + pshufb %xmm4, STATE + movups STATE, (LEN) + + movups (IVP), %xmm0 + pshufb %xmm0, IN1 + pblendvb IN2, IN1 + movaps IN1, STATE + + pxor STATE4, STATE + call _aesni_dec1 + pxor STATE4, STATE + + movups STATE, (OUTP) + jmp .Lxts_dec_ret +SYM_FUNC_END(aesni_xts_decrypt) |