forked from KolibriOS/kolibrios
274 lines
6.9 KiB
NASM
274 lines
6.9 KiB
NASM
; libcrash -- cryptographic hash functions
|
|
;
|
|
; Copyright (C) 2012-2013,2016 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/>.
|
|
|
|
|
|
proc sha1._.f
|
|
push ebx ecx edx
|
|
xor ecx, edx
|
|
and ebx, ecx
|
|
xor ebx, edx
|
|
mov esi, ebx
|
|
pop edx ecx ebx
|
|
ret
|
|
endp
|
|
|
|
proc sha1._.g
|
|
push ebx ecx edx
|
|
xor ebx, ecx
|
|
xor ebx, edx
|
|
mov esi, ebx
|
|
pop edx ecx ebx
|
|
ret
|
|
endp
|
|
|
|
proc sha1._.h
|
|
push ebx ecx edx
|
|
mov esi, ebx
|
|
and ebx, ecx
|
|
and ecx, edx
|
|
and esi, edx
|
|
or ebx, ecx
|
|
or esi, ebx
|
|
pop edx ecx ebx
|
|
ret
|
|
endp
|
|
|
|
macro sha1._.round f, k, c
|
|
{
|
|
mov esi, eax
|
|
rol esi, 5
|
|
mov [temp], esi
|
|
call f
|
|
|
|
add esi, edi
|
|
add [temp], esi
|
|
mov esi, [w + (c)*4]
|
|
add esi, k
|
|
add [temp], esi
|
|
|
|
mov edi, edx
|
|
mov edx, ecx
|
|
mov ecx, ebx
|
|
rol ecx, 30
|
|
mov ebx, eax
|
|
mov eax, [temp]
|
|
}
|
|
|
|
|
|
proc sha1.init _ctx
|
|
mov ebx, [_ctx]
|
|
lea edi, [ebx + ctx_sha1.hash]
|
|
mov esi, sha1._.hash_init
|
|
mov ecx, SHA1_HASH_SIZE/4
|
|
rep movsd
|
|
xor eax, eax
|
|
mov [ebx + ctx_sha1.index], eax
|
|
mov [ebx + ctx_sha1.msglen_0], eax
|
|
mov [ebx + ctx_sha1.msglen_1], eax
|
|
ret
|
|
endp
|
|
|
|
|
|
proc sha1._.block _hash
|
|
locals
|
|
temp rd 1
|
|
w rd 80
|
|
endl
|
|
lea edi, [w]
|
|
xor ecx, ecx
|
|
@@:
|
|
mov eax, [esi]
|
|
add esi, 4
|
|
bswap eax
|
|
mov [edi], eax
|
|
add edi, 4
|
|
add ecx, 1
|
|
cmp ecx, 16
|
|
jne @b
|
|
@@:
|
|
mov eax, [w + (ecx - 3)*4]
|
|
xor eax, [w + (ecx - 8)*4]
|
|
xor eax, [w + (ecx - 14)*4]
|
|
xor eax, [w + (ecx - 16)*4]
|
|
rol eax, 1
|
|
mov [w + ecx*4], eax
|
|
add ecx, 1
|
|
cmp ecx, 80
|
|
jne @b
|
|
|
|
mov edi, [_hash]
|
|
mov eax, [edi + 0x00]
|
|
mov ebx, [edi + 0x04]
|
|
mov ecx, [edi + 0x08]
|
|
mov edx, [edi + 0x0c]
|
|
mov edi, [edi + 0x10]
|
|
|
|
push esi
|
|
|
|
repeat 20
|
|
sha1._.round sha1._.f, 0x5a827999, %-1
|
|
end repeat
|
|
|
|
repeat 20
|
|
sha1._.round sha1._.g, 0x6ed9eba1, %-1+20
|
|
end repeat
|
|
|
|
repeat 20
|
|
sha1._.round sha1._.h, 0x8f1bbcdc, %-1+40
|
|
end repeat
|
|
|
|
repeat 20
|
|
sha1._.round sha1._.g, 0xca62c1d6, %-1+60
|
|
end repeat
|
|
|
|
pop esi
|
|
|
|
mov [temp], edi
|
|
mov edi, [_hash]
|
|
add [edi + 0x00], eax
|
|
add [edi + 0x04], ebx
|
|
add [edi + 0x08], ecx
|
|
add [edi + 0x0c], edx
|
|
mov eax, [temp]
|
|
add [edi + 0x10], eax
|
|
|
|
ret
|
|
endp
|
|
|
|
|
|
proc sha1.update _ctx, _msg, _size
|
|
mov ebx, [_ctx]
|
|
mov ecx, [_size]
|
|
add [ebx + ctx_sha1.msglen_0], ecx
|
|
adc [ebx + ctx_sha1.msglen_1], 0
|
|
|
|
.next_block:
|
|
mov ebx, [_ctx]
|
|
mov esi, [_msg]
|
|
mov eax, [ebx + ctx_sha1.index]
|
|
and eax, SHA1_BLOCK_SIZE-1
|
|
jnz .copy_to_buf
|
|
test esi, SHA1_ALIGN_MASK
|
|
jnz .copy_to_buf
|
|
.no_copy:
|
|
; data is aligned, hash it in place without copying
|
|
mov ebx, [_ctx]
|
|
cmp [_size], SHA1_BLOCK_SIZE
|
|
jb .copy_quit
|
|
lea eax, [ebx + ctx_sha1.hash]
|
|
stdcall sha1._.block, eax
|
|
sub [_size], SHA1_BLOCK_SIZE
|
|
; add esi, SHA1_BLOCK_SIZE ; FIXME
|
|
jmp .no_copy
|
|
|
|
.copy_to_buf:
|
|
lea edi, [ebx + ctx_sha1.block]
|
|
add edi, eax
|
|
mov ecx, SHA1_BLOCK_SIZE
|
|
sub ecx, eax
|
|
cmp [_size], ecx
|
|
jb .copy_quit
|
|
sub [_size], ecx
|
|
add [_msg], ecx
|
|
add [ebx + ctx_sha1.index], ecx
|
|
rep movsb
|
|
lea eax, [ebx + ctx_sha1.hash]
|
|
lea esi, [ebx + ctx_sha1.block]
|
|
stdcall sha1._.block, eax
|
|
jmp .next_block
|
|
|
|
.copy_quit:
|
|
mov ebx, [_ctx]
|
|
lea edi, [ebx + ctx_sha1.block]
|
|
mov eax, [ebx + ctx_sha1.index]
|
|
and eax, SHA1_BLOCK_SIZE-1
|
|
add edi, eax
|
|
mov ecx, [_size]
|
|
add [ebx + ctx_sha1.index], ecx
|
|
rep movsb
|
|
.quit:
|
|
|
|
ret
|
|
endp
|
|
|
|
|
|
proc sha1.final _ctx
|
|
mov ebx, [_ctx]
|
|
lea edi, [ebx + ctx_sha1.block]
|
|
mov ecx, [ebx + ctx_sha1.msglen_0]
|
|
and ecx, SHA1_BLOCK_SIZE-1
|
|
add edi, ecx
|
|
mov byte[edi], 0x80
|
|
inc edi
|
|
neg ecx
|
|
add ecx, SHA1_BLOCK_SIZE
|
|
cmp ecx, 8
|
|
ja .last
|
|
|
|
dec ecx
|
|
xor eax, eax
|
|
rep stosb
|
|
lea esi, [ebx + ctx_sha1.block]
|
|
lea eax, [ebx + ctx_sha1.hash]
|
|
stdcall sha1._.block, eax
|
|
mov ebx, [_ctx]
|
|
lea edi, [ebx + ctx_sha1.block]
|
|
mov ecx, SHA1_BLOCK_SIZE+1
|
|
.last:
|
|
dec ecx
|
|
sub ecx, 8
|
|
xor eax, eax
|
|
rep stosb
|
|
mov eax, [ebx + ctx_sha1.msglen_0]
|
|
mov edx, [ebx + ctx_sha1.msglen_1]
|
|
shld edx, eax, 3
|
|
shl eax, 3
|
|
bswap eax
|
|
bswap edx
|
|
mov dword[edi], edx
|
|
mov dword[edi+4], eax
|
|
lea esi, [ebx + ctx_sha1.block]
|
|
lea eax, [ebx + ctx_sha1.hash]
|
|
stdcall sha1._.block, eax
|
|
|
|
mov ebx, [_ctx]
|
|
lea eax, [ebx + ctx_sha1.hash]
|
|
stdcall sha1._.postprocess, ebx, eax
|
|
|
|
ret
|
|
endp
|
|
|
|
|
|
proc sha1._.postprocess _ctx, _hash
|
|
mov ecx, 5
|
|
mov esi, [_hash]
|
|
mov edi, esi
|
|
@@:
|
|
lodsd
|
|
bswap eax
|
|
stosd
|
|
dec ecx
|
|
jnz @b
|
|
ret
|
|
endp
|
|
|
|
|
|
align SHA1_ALIGN
|
|
|
|
sha1._.hash_init dd 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0
|
|
|