; libcrash -- cryptographic hash functions
;
; Copyright (C) 2012-2013 Ivan Baravy (dunkaist)
;
; This program is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program. If not, see <http://www.gnu.org/licenses/>.
macro chn x, y, z
{
mov eax, [y]
xor eax, [z]
and eax, [x]
xor eax, [z]
}
macro maj x, y, z
{
mov eax, [x]
xor eax, [y]
and eax, [z]
mov ecx, [x]
and ecx, [y]
xor eax, ecx
}
macro Sigma0 x
{
mov eax, x
mov ecx, eax
ror ecx, 2
ror eax, 13
xor eax, ecx
mov ecx, x
ror ecx, 22
xor eax, ecx
}
macro Sigma1 x
{
mov eax, x
mov ecx, eax
ror ecx, 6
ror eax, 11
xor eax, ecx
mov ecx, x
ror ecx, 25
xor eax, ecx
}
macro sigma0 x
{
mov eax, x
mov ecx, eax
ror ecx, 7
ror eax, 18
xor eax, ecx
mov ecx, x
shr ecx, 3
xor eax, ecx
}
macro sigma1 x
{
mov eax, x
mov ecx, eax
ror ecx, 17
ror eax, 19
xor eax, ecx
mov ecx, x
shr ecx, 10
xor eax, ecx
}
macro recalculate_w n
{
mov edx, [w + ((n-2) and 15)*4]
sigma1 edx
add eax, [w + ((n-7) and 15)*4]
push eax
mov edx, [w + ((n-15) and 15)*4]
sigma0 edx
pop ecx
add eax, ecx
add [w + (n)*4], eax
}
macro crash.sha256.round a, b, c, d, e, f, g, h, k
{
mov ebx, [h]
mov edx, [e]
Sigma1 edx
add ebx, eax
chn e, f, g
add ebx, eax
add ebx, [k]
add ebx, edi
add [d], ebx
mov edx, [a]
Sigma0 edx
add ebx, eax
maj a, b, c
add eax, ebx
mov [h], eax
}
macro crash.sha256.round_1_16 a, b, c, d, e, f, g, h, n
{
mov eax, [esi + (n)*4]
bswap eax
mov dword[w + (n)*4], eax
mov edi, eax
crash.sha256.round a, b, c, d, e, f, g, h, (crash._.sha256_table + (n)*4)
}
macro crash.sha256.round_17_64 a, b, c, d, e, f, g, h, n, rep_num
{
recalculate_w n
mov edi, [w + (n)*4]
crash.sha256.round a, b, c, d, e, f, g, h, (crash._.sha256_table + (n+16*rep_num)*4)
}
proc crash.sha256 _sha256, _data
locals
w rd 64
A rd 1
B rd 1
C rd 1
D rd 1
E rd 1
F rd 1
G rd 1
H rd 1
endl
mov edi, [_sha256]
mov eax, [edi + 0x00]
mov [A], eax
mov eax, [edi + 0x04]
mov [B], eax
mov eax, [edi + 0x08]
mov [C], eax
mov eax, [edi + 0x0c]
mov [D], eax
mov eax, [edi + 0x10]
mov [E], eax
mov eax, [edi + 0x14]
mov [F], eax
mov eax, [edi + 0x18]
mov [G], eax
mov eax, [edi + 0x1c]
mov [H], eax
crash.sha256.round_1_16 A, B, C, D, E, F, G, H, 0
crash.sha256.round_1_16 H, A, B, C, D, E, F, G, 1
crash.sha256.round_1_16 G, H, A, B, C, D, E, F, 2
crash.sha256.round_1_16 F, G, H, A, B, C, D, E, 3
crash.sha256.round_1_16 E, F, G, H, A, B, C, D, 4
crash.sha256.round_1_16 D, E, F, G, H, A, B, C, 5
crash.sha256.round_1_16 C, D, E, F, G, H, A, B, 6
crash.sha256.round_1_16 B, C, D, E, F, G, H, A, 7
crash.sha256.round_1_16 A, B, C, D, E, F, G, H, 8
crash.sha256.round_1_16 H, A, B, C, D, E, F, G, 9
crash.sha256.round_1_16 G, H, A, B, C, D, E, F, 10
crash.sha256.round_1_16 F, G, H, A, B, C, D, E, 11
crash.sha256.round_1_16 E, F, G, H, A, B, C, D, 12
crash.sha256.round_1_16 D, E, F, G, H, A, B, C, 13
crash.sha256.round_1_16 C, D, E, F, G, H, A, B, 14
crash.sha256.round_1_16 B, C, D, E, F, G, H, A, 15
repeat 3
crash.sha256.round_17_64 A, B, C, D, E, F, G, H, 0, %
crash.sha256.round_17_64 H, A, B, C, D, E, F, G, 1, %
crash.sha256.round_17_64 G, H, A, B, C, D, E, F, 2, %
crash.sha256.round_17_64 F, G, H, A, B, C, D, E, 3, %
crash.sha256.round_17_64 E, F, G, H, A, B, C, D, 4, %
crash.sha256.round_17_64 D, E, F, G, H, A, B, C, 5, %
crash.sha256.round_17_64 C, D, E, F, G, H, A, B, 6, %
crash.sha256.round_17_64 B, C, D, E, F, G, H, A, 7, %
crash.sha256.round_17_64 A, B, C, D, E, F, G, H, 8, %
crash.sha256.round_17_64 H, A, B, C, D, E, F, G, 9, %
crash.sha256.round_17_64 G, H, A, B, C, D, E, F, 10, %
crash.sha256.round_17_64 F, G, H, A, B, C, D, E, 11, %
crash.sha256.round_17_64 E, F, G, H, A, B, C, D, 12, %
crash.sha256.round_17_64 D, E, F, G, H, A, B, C, 13, %
crash.sha256.round_17_64 C, D, E, F, G, H, A, B, 14, %
crash.sha256.round_17_64 B, C, D, E, F, G, H, A, 15, %
end repeat
mov edi, [_sha256]
mov eax, [A]
add [edi + 0x00], eax
mov eax, [B]
add [edi + 0x04], eax
mov eax, [C]
add [edi + 0x08], eax
mov eax, [D]
add [edi + 0x0c], eax
mov eax, [E]
add [edi + 0x10], eax
mov eax, [F]
add [edi + 0x14], eax
mov eax, [G]
add [edi + 0x18], eax
mov eax, [H]
add [edi + 0x1c], eax
add esi, 64
ret
endp