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; Routine to do AES key expansion

%include "reg_sizes.asm"

[bits 64]
default rel
section .text

%macro key_expansion_128_sse 0
	;; Assumes the xmm3 includes all zeros at this point.
        pshufd	xmm2, xmm2, 11111111b
        shufps	xmm3, xmm1, 00010000b
        pxor	xmm1, xmm3
        shufps	xmm3, xmm1, 10001100b
        pxor	xmm1, xmm3
	pxor	xmm1, xmm2
%endmacro

%macro key_expansion_128_avx 0
	;; Assumes the xmm3 includes all zeros at this point.
        vpshufd	xmm2, xmm2, 11111111b
        vshufps	xmm3, xmm3, xmm1, 00010000b
        vpxor	xmm1, xmm1, xmm3
        vshufps	xmm3, xmm3, xmm1, 10001100b
        vpxor	xmm1, xmm1, xmm3
	vpxor	xmm1, xmm1, xmm2
%endmacro

%ifidn __OUTPUT_FORMAT__, elf64
%define KEY		rdi
%define EXP_ENC_KEYS	rsi
%define EXP_DEC_KEYS	rdx
%else
%define KEY		rcx
%define EXP_ENC_KEYS	rdx
%define EXP_DEC_KEYS	r8
%endif


; void aes_keyexp_128(UINT8 *key,
;                     UINT8 *enc_exp_keys,
;                     UINT8 *dec_exp_keys);
;
; arg 1: rcx: pointer to key
; arg 2: rdx: pointer to expanded key array for encrypt
; arg 3: r8:  pointer to expanded key array for decrypt
;
mk_global aes_keyexp_128_sse, function
aes_keyexp_128_sse:
	endbranch
        movdqu	xmm1, [KEY]	; loading the AES key
	movdqu	[EXP_ENC_KEYS + 16*0], xmm1
        movdqu	[EXP_DEC_KEYS + 16*10], xmm1  ; Storing key in memory
	pxor	xmm3, xmm3

        aeskeygenassist	xmm2, xmm1, 0x1     ; Generating round key 1
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*1], xmm1
        aesimc	xmm4, xmm1
        movdqu	[EXP_DEC_KEYS + 16*9], xmm4

        aeskeygenassist xmm2, xmm1, 0x2     ; Generating round key 2
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*2], xmm1
        aesimc	xmm5, xmm1
        movdqu	[EXP_DEC_KEYS + 16*8], xmm5

        aeskeygenassist xmm2, xmm1, 0x4     ; Generating round key 3
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*3], xmm1
        aesimc	xmm4, xmm1
        movdqu	[EXP_DEC_KEYS + 16*7], xmm4

        aeskeygenassist xmm2, xmm1, 0x8     ; Generating round key 4
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*4], xmm1
        aesimc	xmm5, xmm1
        movdqu	[EXP_DEC_KEYS + 16*6], xmm5

        aeskeygenassist xmm2, xmm1, 0x10    ; Generating round key 5
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*5], xmm1
        aesimc	xmm4, xmm1
        movdqu	[EXP_DEC_KEYS + 16*5], xmm4

        aeskeygenassist xmm2, xmm1, 0x20    ; Generating round key 6
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*6], xmm1
        aesimc	xmm5, xmm1
        movdqu	[EXP_DEC_KEYS + 16*4], xmm5

        aeskeygenassist xmm2, xmm1, 0x40    ; Generating round key 7
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*7], xmm1
        aesimc	xmm4, xmm1
        movdqu	[EXP_DEC_KEYS + 16*3], xmm4

        aeskeygenassist xmm2, xmm1, 0x80    ; Generating round key 8
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*8], xmm1
        aesimc	xmm5, xmm1
        movdqu	[EXP_DEC_KEYS + 16*2], xmm5

        aeskeygenassist xmm2, xmm1, 0x1b    ; Generating round key 9
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*9], xmm1
        aesimc	xmm4, xmm1
        movdqu	[EXP_DEC_KEYS + 16*1], xmm4

        aeskeygenassist xmm2, xmm1, 0x36    ; Generating round key 10
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*10], xmm1
        movdqu	[EXP_DEC_KEYS + 16*0], xmm1

	ret

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mk_global aes_keyexp_128_avx, function
aes_keyexp_128_avx:
	endbranch
        vmovdqu	xmm1, [KEY]	; loading the AES key
	vmovdqu	[EXP_ENC_KEYS + 16*0], xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*10], xmm1  ; Storing key in memory
	vpxor	xmm3, xmm3, xmm3

        vaeskeygenassist	xmm2, xmm1, 0x1     ; Generating round key 1
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*1], xmm1
        vaesimc	xmm4, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*9], xmm4

        vaeskeygenassist xmm2, xmm1, 0x2     ; Generating round key 2
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*2], xmm1
        vaesimc	xmm5, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*8], xmm5

        vaeskeygenassist xmm2, xmm1, 0x4     ; Generating round key 3
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*3], xmm1
        vaesimc	xmm4, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*7], xmm4

        vaeskeygenassist xmm2, xmm1, 0x8     ; Generating round key 4
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*4], xmm1
        vaesimc	xmm5, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*6], xmm5

        vaeskeygenassist xmm2, xmm1, 0x10    ; Generating round key 5
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*5], xmm1
        vaesimc	xmm4, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*5], xmm4

        vaeskeygenassist xmm2, xmm1, 0x20    ; Generating round key 6
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*6], xmm1
        vaesimc	xmm5, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*4], xmm5

        vaeskeygenassist xmm2, xmm1, 0x40    ; Generating round key 7
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*7], xmm1
        vaesimc	xmm4, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*3], xmm4

        vaeskeygenassist xmm2, xmm1, 0x80    ; Generating round key 8
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*8], xmm1
        vaesimc	xmm5, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*2], xmm5

        vaeskeygenassist xmm2, xmm1, 0x1b    ; Generating round key 9
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*9], xmm1
        vaesimc	xmm4, xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*1], xmm4

        vaeskeygenassist xmm2, xmm1, 0x36    ; Generating round key 10
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*10], xmm1
        vmovdqu	[EXP_DEC_KEYS + 16*0], xmm1

	ret

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; void aes_keyexp_128_enc_sse(UINT8 *key,
;                             UINT8 *enc_exp_keys);
;
; arg 1: rcx: pointer to key
; arg 2: rdx: pointer to expanded key array for encrypt
;
mk_global aes_keyexp_128_enc_sse, function
aes_keyexp_128_enc_sse:
	endbranch
        movdqu	xmm1, [KEY]	; loading the AES key
	movdqu	[EXP_ENC_KEYS + 16*0], xmm1
	pxor	xmm3, xmm3

        aeskeygenassist	xmm2, xmm1, 0x1     ; Generating round key 1
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*1], xmm1

        aeskeygenassist xmm2, xmm1, 0x2     ; Generating round key 2
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*2], xmm1

        aeskeygenassist xmm2, xmm1, 0x4     ; Generating round key 3
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*3], xmm1

        aeskeygenassist xmm2, xmm1, 0x8     ; Generating round key 4
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*4], xmm1

        aeskeygenassist xmm2, xmm1, 0x10    ; Generating round key 5
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*5], xmm1

        aeskeygenassist xmm2, xmm1, 0x20    ; Generating round key 6
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*6], xmm1

        aeskeygenassist xmm2, xmm1, 0x40    ; Generating round key 7
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*7], xmm1

        aeskeygenassist xmm2, xmm1, 0x80    ; Generating round key 8
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*8], xmm1

        aeskeygenassist xmm2, xmm1, 0x1b    ; Generating round key 9
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*9], xmm1

        aeskeygenassist xmm2, xmm1, 0x36    ; Generating round key 10
        key_expansion_128_sse
	movdqu	[EXP_ENC_KEYS + 16*10], xmm1

	ret

mk_global aes_keyexp_128_enc_avx, function
aes_keyexp_128_enc_avx:
	endbranch
        vmovdqu	xmm1, [KEY]	; loading the AES key
	vmovdqu	[EXP_ENC_KEYS + 16*0], xmm1
	vpxor	xmm3, xmm3, xmm3

        vaeskeygenassist	xmm2, xmm1, 0x1     ; Generating round key 1
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*1], xmm1

        vaeskeygenassist xmm2, xmm1, 0x2     ; Generating round key 2
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*2], xmm1

        vaeskeygenassist xmm2, xmm1, 0x4     ; Generating round key 3
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*3], xmm1

        vaeskeygenassist xmm2, xmm1, 0x8     ; Generating round key 4
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*4], xmm1

        vaeskeygenassist xmm2, xmm1, 0x10    ; Generating round key 5
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*5], xmm1

        vaeskeygenassist xmm2, xmm1, 0x20    ; Generating round key 6
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*6], xmm1

        vaeskeygenassist xmm2, xmm1, 0x40    ; Generating round key 7
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*7], xmm1

        vaeskeygenassist xmm2, xmm1, 0x80    ; Generating round key 8
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*8], xmm1

        vaeskeygenassist xmm2, xmm1, 0x1b    ; Generating round key 9
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*9], xmm1

        vaeskeygenassist xmm2, xmm1, 0x36    ; Generating round key 10
        key_expansion_128_avx
	vmovdqu	[EXP_ENC_KEYS + 16*10], xmm1

	ret

