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;;
;; Copyright (c) 2012-2022, Intel Corporation
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions are met:
;;
;; * Redistributions of source code must retain the above copyright notice,
;; this list of conditions and the following disclaimer.
;; * Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in the
;; documentation and/or other materials provided with the distribution.
;; * Neither the name of Intel Corporation nor the names of its contributors
;; may be used to endorse or promote products derived from this software
;; without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
;; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;
; routine to do AES cbc decrypt on 16n bytes doing AES by 4
; XMM registers are clobbered. Saving/restoring must be done at a higher level
; void aes_cbc_dec_256_sse(void *in,
; UINT128 *IV,
; UINT128 keys[15],
; void *out,
; UINT64 len_bytes);
;
; arg 1: rcx: pointer to input (cipher text)
; arg 2: rdx: pointer to IV
; arg 3: r8: pointer to keys
; arg 4: r9: pointer to output (plain text)
; arg 5: sp: length in bytes (multiple of 16)
;
%include "include/os.asm"
%include "include/clear_regs.asm"
%ifndef AES_CBC_DEC_256
%define AES_CBC_DEC_256 aes_cbc_dec_256_sse
%endif
%define MOVDQ movdqu
%ifdef LINUX
%define IN rdi
%define IV rsi
%define KEYS rdx
%define OUT rcx
%define LEN r8
%else
%define IN rcx
%define IV rdx
%define KEYS r8
%define OUT r9
%define LEN r10
%endif
%define IDX rax
%define TMP IDX
%define XDATA0 xmm0
%define XDATA1 xmm1
%define XDATA2 xmm2
%define XDATA3 xmm3
%define XKEY0 xmm4
%define XKEY2 xmm5
%define XKEY4 xmm6
%define XKEY6 xmm7
%define XKEY10 xmm8
%define XIV xmm9
%define XSAVED0 xmm10
%define XSAVED1 xmm11
%define XSAVED2 xmm12
%define XSAVED3 xmm13
%define XKEY_A xmm14
%define XKEY_B xmm15
%define IV_TMP XSAVED3
mksection .text
MKGLOBAL(AES_CBC_DEC_256,function,internal)
AES_CBC_DEC_256:
%ifndef LINUX
mov LEN, [rsp + 8*5]
%endif
mov TMP, LEN
and TMP, 3*16
jz initial_4
cmp TMP, 2*16
jb initial_1
ja initial_3
initial_2:
; load cipher text
movdqu XDATA0, [IN + 0*16]
movdqu XDATA1, [IN + 1*16]
movdqa XKEY0, [KEYS + 0*16]
; save cipher text
movdqa XSAVED0, XDATA0
movdqa XIV, XDATA1
pxor XDATA0, XKEY0 ; 0. ARK
pxor XDATA1, XKEY0
movdqa XKEY2, [KEYS + 2*16]
aesdec XDATA0, [KEYS + 1*16] ; 1. DEC
aesdec XDATA1, [KEYS + 1*16]
mov IDX, 2*16
aesdec XDATA0, XKEY2 ; 2. DEC
aesdec XDATA1, XKEY2
movdqa XKEY4, [KEYS + 4*16]
aesdec XDATA0, [KEYS + 3*16] ; 3. DEC
aesdec XDATA1, [KEYS + 3*16]
movdqu IV_TMP, [IV]
aesdec XDATA0, XKEY4 ; 4. DEC
aesdec XDATA1, XKEY4
movdqa XKEY6, [KEYS + 6*16]
aesdec XDATA0, [KEYS + 5*16] ; 5. DEC
aesdec XDATA1, [KEYS + 5*16]
aesdec XDATA0, XKEY6 ; 6. DEC
aesdec XDATA1, XKEY6
movdqa XKEY_B, [KEYS + 8*16]
aesdec XDATA0, [KEYS + 7*16] ; 7. DEC
aesdec XDATA1, [KEYS + 7*16]
aesdec XDATA0, XKEY_B ; 8. DEC
aesdec XDATA1, XKEY_B
movdqa XKEY10, [KEYS + 10*16]
aesdec XDATA0, [KEYS + 9*16] ; 9. DEC
aesdec XDATA1, [KEYS + 9*16]
aesdec XDATA0, XKEY10 ; 10. DEC
aesdec XDATA1, XKEY10
aesdec XDATA0, [KEYS + 11*16] ; 11. DEC
aesdec XDATA1, [KEYS + 11*16]
aesdec XDATA0, [KEYS + 12*16] ; 12. DEC
aesdec XDATA1, [KEYS + 12*16]
aesdec XDATA0, [KEYS + 13*16] ; 13. DEC
aesdec XDATA1, [KEYS + 13*16]
aesdeclast XDATA0, [KEYS + 14*16] ; 14. DEC
aesdeclast XDATA1, [KEYS + 14*16]
pxor XDATA0, IV_TMP
pxor XDATA1, XSAVED0
movdqu [OUT + 0*16], XDATA0
movdqu [OUT + 1*16], XDATA1
cmp LEN, 2*16
je done
jmp main_loop
align 16
initial_1:
; load cipher text
movdqu XDATA0, [IN + 0*16]
movdqa XKEY0, [KEYS + 0*16]
; save cipher text
movdqa XIV, XDATA0
pxor XDATA0, XKEY0 ; 0. ARK
movdqa XKEY2, [KEYS + 2*16]
aesdec XDATA0, [KEYS + 1*16] ; 1. DEC
mov IDX, 1*16
aesdec XDATA0, XKEY2 ; 2. DEC
movdqa XKEY4, [KEYS + 4*16]
aesdec XDATA0, [KEYS + 3*16] ; 3. DEC
movdqu IV_TMP, [IV]
aesdec XDATA0, XKEY4 ; 4. DEC
movdqa XKEY6, [KEYS + 6*16]
aesdec XDATA0, [KEYS + 5*16] ; 5. DEC
aesdec XDATA0, XKEY6 ; 6. DEC
movdqa XKEY_B, [KEYS + 8*16]
aesdec XDATA0, [KEYS + 7*16] ; 7. DEC
aesdec XDATA0, XKEY_B ; 8. DEC
movdqa XKEY10, [KEYS + 10*16]
aesdec XDATA0, [KEYS + 9*16] ; 9. DEC
aesdec XDATA0, XKEY10 ; 10. DEC
aesdec XDATA0, [KEYS + 11*16] ; 11. DEC
aesdec XDATA0, [KEYS + 12*16] ; 12. DEC
aesdec XDATA0, [KEYS + 13*16] ; 13. DEC
aesdeclast XDATA0, [KEYS + 14*16] ; 14. DEC
pxor XDATA0, IV_TMP
movdqu [OUT + 0*16], XDATA0
cmp LEN, 1*16
je done
jmp main_loop
initial_3:
; load cipher text
movdqu XDATA0, [IN + 0*16]
movdqu XDATA1, [IN + 1*16]
movdqu XDATA2, [IN + 2*16]
movdqa XKEY0, [KEYS + 0*16]
; save cipher text
movdqa XSAVED0, XDATA0
movdqa XSAVED1, XDATA1
movdqa XIV, XDATA2
movdqa XKEY_A, [KEYS + 1*16]
pxor XDATA0, XKEY0 ; 0. ARK
pxor XDATA1, XKEY0
pxor XDATA2, XKEY0
movdqa XKEY2, [KEYS + 2*16]
aesdec XDATA0, XKEY_A ; 1. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
movdqa XKEY_A, [KEYS + 3*16]
mov IDX, 3*16
aesdec XDATA0, XKEY2 ; 2. DEC
aesdec XDATA1, XKEY2
aesdec XDATA2, XKEY2
movdqa XKEY4, [KEYS + 4*16]
aesdec XDATA0, XKEY_A ; 3. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
movdqa XKEY_A, [KEYS + 5*16]
movdqu IV_TMP, [IV]
aesdec XDATA0, XKEY4 ; 4. DEC
aesdec XDATA1, XKEY4
aesdec XDATA2, XKEY4
movdqa XKEY6, [KEYS + 6*16]
aesdec XDATA0, XKEY_A ; 5. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
movdqa XKEY_A, [KEYS + 7*16]
aesdec XDATA0, XKEY6 ; 6. DEC
aesdec XDATA1, XKEY6
aesdec XDATA2, XKEY6
movdqa XKEY_B, [KEYS + 8*16]
aesdec XDATA0, XKEY_A ; 7. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
movdqa XKEY_A, [KEYS + 9*16]
aesdec XDATA0, XKEY_B ; 8. DEC
aesdec XDATA1, XKEY_B
aesdec XDATA2, XKEY_B
movdqa XKEY10, [KEYS + 10*16]
aesdec XDATA0, XKEY_A ; 9. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
movdqa XKEY_A, [KEYS + 11*16]
aesdec XDATA0, XKEY10 ; 10. DEC
aesdec XDATA1, XKEY10
aesdec XDATA2, XKEY10
movdqa XKEY_B, [KEYS + 12*16]
aesdec XDATA0, XKEY_A ; 11. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
movdqa XKEY_A, [KEYS + 13*16]
aesdec XDATA0, XKEY_B ; 12. DEC
aesdec XDATA1, XKEY_B
aesdec XDATA2, XKEY_B
movdqa XKEY_B, [KEYS + 14*16]
aesdec XDATA0, XKEY_A ; 13. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdeclast XDATA0, XKEY_B ; 14. DEC
aesdeclast XDATA1, XKEY_B
aesdeclast XDATA2, XKEY_B
pxor XDATA0, IV_TMP
pxor XDATA1, XSAVED0
pxor XDATA2, XSAVED1
movdqu [OUT + 0*16], XDATA0
movdqu [OUT + 1*16], XDATA1
movdqu [OUT + 2*16], XDATA2
cmp LEN, 3*16
je done
jmp main_loop
align 16
initial_4:
; load cipher text
movdqu XDATA0, [IN + 0*16]
movdqu XDATA1, [IN + 1*16]
movdqu XDATA2, [IN + 2*16]
movdqu XDATA3, [IN + 3*16]
movdqa XKEY0, [KEYS + 0*16]
; save cipher text
movdqa XSAVED0, XDATA0
movdqa XSAVED1, XDATA1
movdqa XSAVED2, XDATA2
movdqa XIV, XDATA3
movdqa XKEY_A, [KEYS + 1*16]
pxor XDATA0, XKEY0 ; 0. ARK
pxor XDATA1, XKEY0
pxor XDATA2, XKEY0
pxor XDATA3, XKEY0
movdqa XKEY2, [KEYS + 2*16]
aesdec XDATA0, XKEY_A ; 1. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 3*16]
mov IDX, 4*16
aesdec XDATA0, XKEY2 ; 2. DEC
aesdec XDATA1, XKEY2
aesdec XDATA2, XKEY2
aesdec XDATA3, XKEY2
movdqa XKEY4, [KEYS + 4*16]
aesdec XDATA0, XKEY_A ; 3. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 5*16]
movdqu IV_TMP, [IV]
aesdec XDATA0, XKEY4 ; 4. DEC
aesdec XDATA1, XKEY4
aesdec XDATA2, XKEY4
aesdec XDATA3, XKEY4
movdqa XKEY6, [KEYS + 6*16]
aesdec XDATA0, XKEY_A ; 5. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 7*16]
aesdec XDATA0, XKEY6 ; 6. DEC
aesdec XDATA1, XKEY6
aesdec XDATA2, XKEY6
aesdec XDATA3, XKEY6
movdqa XKEY_B, [KEYS + 8*16]
aesdec XDATA0, XKEY_A ; 7. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 9*16]
aesdec XDATA0, XKEY_B ; 8. DEC
aesdec XDATA1, XKEY_B
aesdec XDATA2, XKEY_B
aesdec XDATA3, XKEY_B
movdqa XKEY10, [KEYS + 10*16]
aesdec XDATA0, XKEY_A ; 9. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 11*16]
aesdec XDATA0, XKEY10 ; 10. DEC
aesdec XDATA1, XKEY10
aesdec XDATA2, XKEY10
aesdec XDATA3, XKEY10
movdqa XKEY_B, [KEYS + 12*16]
aesdec XDATA0, XKEY_A ; 11. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 13*16]
aesdec XDATA0, XKEY_B ; 12. DEC
aesdec XDATA1, XKEY_B
aesdec XDATA2, XKEY_B
aesdec XDATA3, XKEY_B
movdqa XKEY_B, [KEYS + 14*16]
aesdec XDATA0, XKEY_A ; 13. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
aesdeclast XDATA0, XKEY_B ; 14. DEC
aesdeclast XDATA1, XKEY_B
aesdeclast XDATA2, XKEY_B
aesdeclast XDATA3, XKEY_B
pxor XDATA0, IV_TMP
pxor XDATA1, XSAVED0
pxor XDATA2, XSAVED1
pxor XDATA3, XSAVED2
movdqu [OUT + 0*16], XDATA0
movdqu [OUT + 1*16], XDATA1
movdqu [OUT + 2*16], XDATA2
movdqu [OUT + 3*16], XDATA3
cmp LEN, 4*16
jz done
jmp main_loop
align 16
main_loop:
; load cipher text
movdqu XDATA0, [IN + IDX + 0*16]
movdqu XDATA1, [IN + IDX + 1*16]
movdqu XDATA2, [IN + IDX + 2*16]
movdqu XDATA3, [IN + IDX + 3*16]
; save cipher text
movdqa XSAVED0, XDATA0
movdqa XSAVED1, XDATA1
movdqa XSAVED2, XDATA2
movdqa XSAVED3, XDATA3
movdqa XKEY_A, [KEYS + 1*16]
pxor XDATA0, XKEY0 ; 0. ARK
pxor XDATA1, XKEY0
pxor XDATA2, XKEY0
pxor XDATA3, XKEY0
add IDX, 4*16
aesdec XDATA0, XKEY_A ; 1. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 3*16]
aesdec XDATA0, XKEY2 ; 2. DEC
aesdec XDATA1, XKEY2
aesdec XDATA2, XKEY2
aesdec XDATA3, XKEY2
aesdec XDATA0, XKEY_A ; 3. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 5*16]
aesdec XDATA0, XKEY4 ; 4. DEC
aesdec XDATA1, XKEY4
aesdec XDATA2, XKEY4
aesdec XDATA3, XKEY4
aesdec XDATA0, XKEY_A ; 5. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 7*16]
aesdec XDATA0, XKEY6 ; 6. DEC
aesdec XDATA1, XKEY6
aesdec XDATA2, XKEY6
aesdec XDATA3, XKEY6
movdqa XKEY_B, [KEYS + 8*16]
aesdec XDATA0, XKEY_A ; 7. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 9*16]
aesdec XDATA0, XKEY_B ; 8. DEC
aesdec XDATA1, XKEY_B
aesdec XDATA2, XKEY_B
aesdec XDATA3, XKEY_B
aesdec XDATA0, XKEY_A ; 9. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 11*16]
aesdec XDATA0, XKEY10 ; 10. DEC
aesdec XDATA1, XKEY10
aesdec XDATA2, XKEY10
aesdec XDATA3, XKEY10
movdqa XKEY_B, [KEYS + 12*16]
aesdec XDATA0, XKEY_A ; 11. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
movdqa XKEY_A, [KEYS + 13*16]
aesdec XDATA0, XKEY_B ; 12. DEC
aesdec XDATA1, XKEY_B
aesdec XDATA2, XKEY_B
aesdec XDATA3, XKEY_B
movdqa XKEY_B, [KEYS + 14*16]
aesdec XDATA0, XKEY_A ; 13. DEC
aesdec XDATA1, XKEY_A
aesdec XDATA2, XKEY_A
aesdec XDATA3, XKEY_A
aesdeclast XDATA0, XKEY_B ; 14. DEC
aesdeclast XDATA1, XKEY_B
aesdeclast XDATA2, XKEY_B
aesdeclast XDATA3, XKEY_B
pxor XDATA0, XIV
pxor XDATA1, XSAVED0
pxor XDATA2, XSAVED1
pxor XDATA3, XSAVED2
movdqu [OUT + IDX + 0*16 - 4*16], XDATA0
movdqu [OUT + IDX + 1*16 - 4*16], XDATA1
movdqu [OUT + IDX + 2*16 - 4*16], XDATA2
movdqu [OUT + IDX + 3*16 - 4*16], XDATA3
movdqa XIV, XSAVED3
CMP IDX, LEN
jne main_loop
done:
%ifdef SAFE_DATA
clear_all_xmms_sse_asm
%endif ;; SAFE_DATA
ret
mksection stack-noexec
|
