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diff --git a/src/asm/aes128.asm b/src/asm/aes128.asm
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-; Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
-; This file is part of the "AES tools" project.
-; For details, see https://github.com/egor-tensin/aes-tools.
-; Distributed under the MIT License.
-
-.586
-.xmm
-.model flat
-
-.code
-
-@aes_AES128_encrypt_block_@20 proc
- pxor xmm0, [ecx]
- aesenc xmm0, [ecx + 10h]
- aesenc xmm0, [ecx + 20h]
- aesenc xmm0, [ecx + 30h]
- aesenc xmm0, [ecx + 40h]
- aesenc xmm0, [ecx + 50h]
- aesenc xmm0, [ecx + 60h]
- aesenc xmm0, [ecx + 70h]
- aesenc xmm0, [ecx + 80h]
- aesenc xmm0, [ecx + 90h]
- aesenclast xmm0, [ecx + 0A0h]
- ret
-@aes_AES128_encrypt_block_@20 endp
-
-@aes_AES128_decrypt_block_@20 proc
- pxor xmm0, [ecx]
- aesdec xmm0, [ecx + 10h]
- aesdec xmm0, [ecx + 20h]
- aesdec xmm0, [ecx + 30h]
- aesdec xmm0, [ecx + 40h]
- aesdec xmm0, [ecx + 50h]
- aesdec xmm0, [ecx + 60h]
- aesdec xmm0, [ecx + 70h]
- aesdec xmm0, [ecx + 80h]
- aesdec xmm0, [ecx + 90h]
- aesdeclast xmm0, [ecx + 0A0h]
- ret
-@aes_AES128_decrypt_block_@20 endp
-
-@aes_AES128_expand_key_@20 proc
- ; A "word" (in terms of the FIPS 187 standard) is a 32-bit block.
- ; Words are denoted by `w[N]`.
- ;
- ; A key schedule is composed of 10 "regular" keys and a dumb key for
- ; the "whitening" step.
- ;
- ; A key schedule is thus composed of 44 "words".
- ; The FIPS standard includes an algorithm to calculate these words via
- ; a simple loop:
- ;
- ; i = 4
- ; while i < 44:
- ; temp = w[i - 1]
- ; if i % 4 == 0:
- ; temp = SubWord(RotWord(temp))^Rcon
- ; w[i] = w[i - 4]^temp
- ; i = i + 1
- ;
- ; The loop above may be unrolled like this:
- ;
- ; w[4] = SubWord(RotWord(w[3]))^Rcon^w[0]
- ; w[5] = w[4]^w[1]
- ; = SubWord(RotWord(w[3]))^Rcon^w[1]^w[0]
- ; w[6] = w[5]^w[2]
- ; = SubWord(RotWord(w[3]))^Rcon^w[2]^w[1]^w[0]
- ; w[7] = w[6]^w[3]
- ; = SubWord(RotWord(w[3]))^Rcon^w[3]^w[2]^w[1]^w[0]
- ; w[8] = SubWord(RotWord(w[7]))^Rcon^w[4]
- ; w[9] = w[8]^w[5]
- ; = SubWord(RotWord(w[7]))^Rcon^w[5]^w[4]
- ; w[10] = w[9]^w[6]
- ; = SubWord(RotWord(w[7]))^Rcon^w[6]^w[5]^w[4]
- ; w[11] = w[10]^w[7]
- ; = SubWord(RotWord(w[7]))^Rcon^w[7]^w[6]^w[5]^w[4]
- ;
- ; ... and so on.
- ;
- ; The Intel AES-NI instruction set facilitates calculating SubWord
- ; and RotWord using `aeskeygenassist`, which is used in this routine.
- ;
- ; Preconditions:
- ; * xmm0[127:96] == w[3],
- ; * xmm0[95:64] == w[2],
- ; * xmm0[63:32] == w[1],
- ; * xmm0[31:0] == w[0].
-
- movdqa [ecx], xmm0 ; sets w[0], w[1], w[2], w[3]
- add ecx, 10h ; ecx = &w[4]
-
- aeskeygenassist xmm5, xmm0, 01h ; xmm5[127:96] = RotWord(SubWord(w[3]))^Rcon
- call aes128_keygen_assist ; sets w[4], w[5], w[6], w[7]
- aeskeygenassist xmm5, xmm0, 02h ; xmm5[127:96] = RotWord(SubWord(w[7]))^Rcon
- call aes128_keygen_assist ; sets w[8], w[9], w[10], w[11]
- aeskeygenassist xmm5, xmm0, 04h ; xmm5[127:96] = RotWord(SubWord(w[11]))^Rcon
- call aes128_keygen_assist ; sets w[12], w[13], w[14], w[15]
- aeskeygenassist xmm5, xmm0, 08h ; xmm5[127:96] = RotWord(SubWord(w[15]))^Rcon
- call aes128_keygen_assist ; sets w[16], w[17], w[18], w[19]
- aeskeygenassist xmm5, xmm0, 10h ; xmm5[127:96] = RotWord(SubWord(w[19]))^Rcon
- call aes128_keygen_assist ; sets w[20], w[21], w[22], w[23]
- aeskeygenassist xmm5, xmm0, 20h ; xmm5[127:96] = RotWord(SubWord(w[23]))^Rcon
- call aes128_keygen_assist ; sets w[24], w[25], w[26], w[27]
- aeskeygenassist xmm5, xmm0, 40h ; xmm5[127:96] = RotWord(SubWord(w[27]))^Rcon
- call aes128_keygen_assist ; sets w[28], w[29], w[30], w[31]
- aeskeygenassist xmm5, xmm0, 80h ; xmm5[127:96] = RotWord(SubWord(w[31]))^Rcon
- call aes128_keygen_assist ; sets w[32], w[33], w[34], w[35]
- aeskeygenassist xmm5, xmm0, 1Bh ; xmm5[127:96] = RotWord(SubWord(w[35]))^Rcon
- call aes128_keygen_assist ; sets w[36], w[37], w[38], w[39]
- aeskeygenassist xmm5, xmm0, 36h ; xmm5[127:96] = RotWord(SubWord(w[39]))^Rcon
- call aes128_keygen_assist ; sets w[40], w[41], w[42], w[43]
-
- ret
-
-aes128_keygen_assist:
- ; Preconditions:
- ; * xmm0[127:96] == w[i+3],
- ; * xmm0[95:64] == w[i+2],
- ; * xmm0[63:32] == w[i+1],
- ; * xmm0[31:0] == w[i],
- ; * xmm5[127:96] == RotWord(SubWord(w[i+3]))^Rcon,
- ; * ecx == &w[i+4].
- ;
- ; Postconditions:
- ; * xmm0[127:96] == w[i+7] == RotWord(SubWord(w[i+3]))^Rcon^w[i+3]^w[i+2]^w[i+1]^w[i],
- ; * xmm0[95:64] == w[i+6] == RotWord(SubWord(w[i+3]))^Rcon^w[i+2]^w[i+1]^w[i],
- ; * xmm0[63:32] == w[i+5] == RotWord(SubWord(w[i+3]))^Rcon^w[i+1]^w[i],
- ; * xmm0[31:0] == w[i+4] == RotWord(SubWord(w[i+3]))^Rcon^w[i],
- ; * ecx == &w[i+8],
- ; * the value in xmm4 is also modified.
-
- ; Calculate
- ; w[i+3]^w[i+2]^w[i+1]^w[i],
- ; w[i+2]^w[i+1]^w[i],
- ; w[i+1]^w[i] and
- ; w[i].
- movdqa xmm4, xmm0 ; xmm4 = xmm0
- pslldq xmm4, 4 ; xmm4 <<= 32
- pxor xmm0, xmm4 ; xmm0 ^= xmm4
- pslldq xmm4, 4 ; xmm4 <<= 32
- pxor xmm0, xmm4 ; xmm0 ^= xmm4
- pslldq xmm4, 4 ; xmm4 <<= 32
- pxor xmm0, xmm4 ; xmm0 ^= xmm4
- ; xmm0[127:96] == w[i+3]^w[i+2]^w[i+1]^w[i]
- ; xmm0[95:64] == w[i+2]^w[i+1]^w[i]
- ; xmm0[63:32] == w[i+1]^w[i]
- ; xmm0[31:0] == w[i]
-
- ; Calculate
- ; w[i+7] == RotWord(SubWord(w[i+3]))^Rcon^w[i+3]^w[i+2]^w[i+1]^w[i],
- ; w[i+6] == RotWord(SubWord(w[i+3]))^Rcon^w[i+2]^w[i+1]^w[i],
- ; w[i+5] == RotWord(SubWord(w[i+3]))^Rcon^w[i+1]^w[i] and
- ; w[i+4] == RotWord(SubWord(w[i+3]))^Rcon^w[i].
- pshufd xmm4, xmm5, 0FFh ; xmm4[127:96] = xmm4[95:64] = xmm4[63:32] = xmm4[31:0] = xmm5[127:96]
- pxor xmm0, xmm4 ; xmm0 ^= xmm4
- ; xmm0[127:96] == w[i+7] == RotWord(SubWord(w[i+3]))^Rcon^w[i+3]^w[i+2]^w[i+1]^w[i]
- ; xmm0[95:64] == w[i+6] == RotWord(SubWord(w[i+3]))^Rcon^w[i+2]^w[i+1]^w[i]
- ; xmm0[63:32] == w[i+5] == RotWord(SubWord(w[i+3]))^Rcon^w[i+1]^w[i]
- ; xmm0[31:0] == w[i+4] == RotWord(SubWord(w[i+3]))^Rcon^w[i]
-
- ; Set w[i+4], w[i+5], w[i+6] and w[i+7].
- movdqa [ecx], xmm0 ; w[i+7] = RotWord(SubWord(w[i+3]))^Rcon^w[i+3]^w[i+2]^w[i+1]^w[i]
- ; w[i+6] = RotWord(SubWord(w[i+3]))^Rcon^w[i+2]^w[i+1]^w[i]
- ; w[i+5] = RotWord(SubWord(w[i+3]))^Rcon^w[i+1]^w[i]
- ; w[i+4] = RotWord(SubWord(w[i+3]))^Rcon^w[i]
- add ecx, 10h ; ecx = &w[i+8]
-
- ret
-@aes_AES128_expand_key_@20 endp
-
-@aes_AES128_derive_decryption_keys_@8 proc
- movdqa xmm5, [ecx]
- movdqa xmm4, [ecx + 0A0h]
- movdqa [edx], xmm4
- movdqa [edx + 0A0h], xmm5
-
- aesimc xmm5, [ecx + 10h]
- aesimc xmm4, [ecx + 90h]
- movdqa [edx + 10h], xmm4
- movdqa [edx + 90h], xmm5
-
- aesimc xmm5, [ecx + 20h]
- aesimc xmm4, [ecx + 80h]
- movdqa [edx + 20h], xmm4
- movdqa [edx + 80h], xmm5
-
- aesimc xmm5, [ecx + 30h]
- aesimc xmm4, [ecx + 70h]
- movdqa [edx + 30h], xmm4
- movdqa [edx + 70h], xmm5
-
- aesimc xmm5, [ecx + 40h]
- aesimc xmm4, [ecx + 60h]
- movdqa [edx + 40h], xmm4
- movdqa [edx + 60h], xmm5
-
- aesimc xmm5, [ecx + 50h]
- movdqa [edx + 50h], xmm5
-
- ret
-@aes_AES128_derive_decryption_keys_@8 endp
-
-end
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