Function at 0x426570
Capabilities:
Compute adler32 checksum

Disassembly:
push ebp
push ebx
push edi
push esi
sub esp, 8
mov ecx, dword [esp + 0x1c]
mov ebx, dword [esp + 0x24]
mov edi, dword [esp + 0x20]
movzx esi, cx
shr ecx, 0x10
cmp ebx, 1
jne 0x4262f1
movzx eax, byte [edi]
lea edx, [esi + eax]
lea eax, [esi + eax - 0xfff1]
cmp edx, 0xfff0
cmovbe eax, edx
add ecx, eax
mov edx, ecx
shl edx, 0x10
cmp ecx, 0xfff0
lea ecx, [edx + 0xf0000]
cmovbe ecx, edx
or ecx, eax
jmp 0x426563
test edi, edi
je 0x426338
cmp ebx, 0x10
jae 0x426342
test ebx, ebx
je 0x42630b
nop
movzx eax, byte [edi]
inc edi
add esi, eax
add ecx, esi
dec ebx
jne 0x426300
lea edi, [esi - 0xfff1]
cmp esi, 0xfff0
mov edx, 0x80078071
mov eax, ecx
cmovbe edi, esi
mul edx
shr edx, 0xf
imul eax, edx, 0xfff1
sub ecx, eax
shl ecx, 0x10
or ecx, edi
jmp 0x426563
mov ecx, 1
jmp 0x426563
cmp ebx, 0x15b0
jb 0x42647a
mov ebp, 0x80078071
nop word cs:[eax + eax]
nop dword [eax]
add ebx, 0xffffea50
mov eax, 0xffffea50
nop dword [eax + eax]
movzx edx, byte [edi + eax + 0x15b0]
add edx, esi
movzx esi, byte [edi + eax + 0x15b1]
add ecx, edx
add esi, edx
movzx edx, byte [edi + eax + 0x15b2]
add ecx, esi
add edx, esi
movzx esi, byte [edi + eax + 0x15b3]
add ecx, edx
add esi, edx
movzx edx, byte [edi + eax + 0x15b4]
add ecx, esi
add edx, esi
movzx esi, byte [edi + eax + 0x15b5]
add ecx, edx
add esi, edx
movzx edx, byte [edi + eax + 0x15b6]
add ecx, esi
add edx, esi
movzx esi, byte [edi + eax + 0x15b7]
add ecx, edx
add esi, edx
movzx edx, byte [edi + eax + 0x15b8]
add ecx, esi
add edx, esi
movzx esi, byte [edi + eax + 0x15b9]
add ecx, edx
add esi, edx
movzx edx, byte [edi + eax + 0x15ba]
add ecx, esi
add edx, esi
movzx esi, byte [edi + eax + 0x15bb]
add ecx, edx
add esi, edx
movzx edx, byte [edi + eax + 0x15bc]
add ecx, esi
add edx, esi
movzx esi, byte [edi + eax + 0x15bd]
add ecx, edx
add esi, edx
movzx edx, byte [edi + eax + 0x15be]
add ecx, esi
add edx, esi
movzx esi, byte [edi + eax + 0x15bf]
add ecx, edx
add esi, edx
add ecx, esi
add eax, 0x10
jne 0x426370
mov eax, esi
add edi, 0x15b0
mul ebp
shr edx, 0xf
imul eax, edx, 0xfff1
sub esi, eax
mov eax, ecx
mul ebp
shr edx, 0xf
imul eax, edx, 0xfff1
sub ecx, eax
cmp ebx, 0x15af
ja 0x426360
test ebx, ebx
je 0x42655e
cmp ebx, 0x10
jb 0x426530
mov edx, ebx
lea ebx, [ebx - 0x10]
mov eax, ebx
and eax, 0xfffffff0
mov dword [esp + 4], eax
lea eax, [eax + 0x10]
mov dword [esp], eax
mov eax, edi
movzx ebp, byte [eax]
add edx, 0xfffffff0
add ebp, esi
movzx esi, byte [eax + 1]
add ecx, ebp
add esi, ebp
movzx ebp, byte [eax + 2]
add ecx, esi
add ebp, esi
movzx esi, byte [eax + 3]
add ecx, ebp
add esi, ebp
movzx ebp, byte [eax + 4]
add ecx, esi
add ebp, esi
movzx esi, byte [eax + 5]
add ecx, ebp
add esi, ebp
movzx ebp, byte [eax + 6]
add ecx, esi
add ebp, esi
movzx esi, byte [eax + 7]
add ecx, ebp
add esi, ebp
movzx ebp, byte [eax + 8]
add ecx, esi
add ebp, esi
movzx esi, byte [eax + 9]
add ecx, ebp
add esi, ebp
movzx ebp, byte [eax + 0xa]
add ecx, esi
add ebp, esi
movzx esi, byte [eax + 0xb]
add ecx, ebp
add esi, ebp
movzx ebp, byte [eax + 0xc]
add ecx, esi
add ebp, esi
movzx esi, byte [eax + 0xd]
add ecx, ebp
add esi, ebp
movzx ebp, byte [eax + 0xe]
add ecx, esi
add ebp, esi
movzx esi, byte [eax + 0xf]
add eax, 0x10
add ecx, ebp
add esi, ebp
add ecx, esi
cmp edx, 0xf
ja 0x426490
sub ebx, dword [esp + 4]
je 0x42653b
add edi, dword [esp]
nop word [eax + eax]
movzx eax, byte [edi]
inc edi
add esi, eax
add ecx, esi
dec ebx
jne 0x426530
mov edi, 0x80078071
mov eax, esi
mul edi
shr edx, 0xf
imul eax, edx, 0xfff1
sub esi, eax
mov eax, ecx
mul edi
shr edx, 0xf
imul eax, edx, 0xfff1
sub ecx, eax
shl ecx, 0x10
or ecx, esi
mov eax, ecx
add esp, 8
pop esi
pop edi
pop ebx
pop ebp
ret
jmp 0x4262a0