Ivan Baravy
f8ff581ce7
move common code parts from all the *hash*.asm files to libcrash.asm replace procedures to macroses in sha1 in favour of readability and uniformity add license notes git-svn-id: svn://kolibrios.org@3431 a494cfbc-eb01-0410-851d-a64ba20cac60
137 lines
2.4 KiB
NASM
137 lines
2.4 KiB
NASM
; libcrash -- cryptographic hash functions
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;
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; Copyright (C) 2012-2013 Ivan Baravy (dunkaist)
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;
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; This program is free software: you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation, either version 3 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program. If not, see <http://www.gnu.org/licenses/>.
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proc crash.sha1.f
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push ebx ecx edx
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xor ecx, edx
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and ebx, ecx
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xor ebx, edx
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mov esi, ebx
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pop edx ecx ebx
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ret
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endp
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proc crash.sha1.g
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push ebx ecx edx
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xor ebx, ecx
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xor ebx, edx
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mov esi, ebx
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pop edx ecx ebx
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ret
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endp
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proc crash.sha1.h
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push ebx ecx edx
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mov esi, ebx
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and ebx, ecx
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and ecx, edx
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and esi, edx
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or ebx, ecx
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or esi, ebx
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pop edx ecx ebx
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ret
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endp
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macro crash.sha1.round f, k, c
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{
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mov esi, eax
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rol esi, 5
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mov [temp], esi
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call f
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add esi, edi
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add [temp], esi
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mov esi, [w + (c)*4]
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add esi, k
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add [temp], esi
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mov edi, edx
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mov edx, ecx
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mov ecx, ebx
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rol ecx, 30
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mov ebx, eax
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mov eax, [temp]
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}
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proc crash.sha1 _sha1, _data
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locals
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temp rd 1
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w rd 80
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endl
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lea edi, [w]
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xor ecx, ecx
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@@:
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mov eax, [esi]
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add esi, 4
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bswap eax
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mov [edi], eax
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add edi, 4
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add ecx, 1
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cmp ecx, 16
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jne @b
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@@:
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mov eax, [w + (ecx - 3)*4]
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xor eax, [w + (ecx - 8)*4]
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xor eax, [w + (ecx - 14)*4]
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xor eax, [w + (ecx - 16)*4]
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rol eax, 1
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mov [w + ecx*4], eax
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add ecx, 1
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cmp ecx, 80
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jne @b
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mov edi, [_sha1]
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mov eax, [edi + 0x00]
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mov ebx, [edi + 0x04]
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mov ecx, [edi + 0x08]
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mov edx, [edi + 0x0c]
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mov edi, [edi + 0x10]
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push esi
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repeat 20
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crash.sha1.round crash.sha1.f, 0x5a827999, %-1
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end repeat
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repeat 20
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crash.sha1.round crash.sha1.g, 0x6ed9eba1, %-1+20
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end repeat
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repeat 20
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crash.sha1.round crash.sha1.h, 0x8f1bbcdc, %-1+40
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end repeat
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repeat 20
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crash.sha1.round crash.sha1.g, 0xca62c1d6, %-1+60
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end repeat
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pop esi
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mov [temp], edi
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mov edi, [_sha1]
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add [edi + 0x00], eax
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add [edi + 0x04], ebx
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add [edi + 0x08], ecx
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add [edi + 0x0c], edx
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mov eax, [temp]
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add [edi + 0x10], eax
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ret
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endp
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