Function at 0x431350
Capabilities:
Compute adler32 checksum

Disassembly:
push ebp
push ebx
push edi
push esi
push eax
mov ebx, dword [esp + 0x20]
mov edi, dword [esp + 0x1c]
mov ecx, dword [esp + 0x18]
movzx esi, cx
shr ecx, 0x10
cmp ebx, 1
jne 0x43103f
movzx eax, byte [edi]
lea edx, [esi + eax]
cmp edx, 0xfff1
lea eax, [esi + eax - 0xfff1]
cmovb eax, edx
add ecx, eax
mov edx, ecx
shl edx, 0x10
cmp ecx, 0xfff1
lea ecx, [edx + 0xf0000]
cmovb ecx, edx
or ecx, eax
jmp 0x431342
test edi, edi
je 0x431081
cmp ebx, 0x10
jae 0x43108b
test ebx, ebx
je 0x43131a
mov eax, ebx
and eax, 3
je 0x4312e4
xor edx, edx
nop dword [eax]
movzx ebp, byte [edi + edx]
add esi, ebp
add ecx, esi
inc edx
cmp eax, edx
jne 0x431060
mov eax, ebx
sub eax, edx
add edi, edx
cmp ebx, 4
jae 0x4312eb
jmp 0x43131a
mov ecx, 1
jmp 0x431342
cmp ebx, 0x15b0
jb 0x4311c0
mov ebp, 0x80078071
nop dword [eax]
add ebx, 0xffffea50
mov eax, 0xffffea50
nop dword [eax + eax]
movzx edx, byte [edi + eax + 0x15b0]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 0x15b1]
add esi, edx
add ecx, esi
movzx edx, byte [edi + eax + 0x15b2]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 0x15b3]
add esi, edx
add ecx, esi
movzx edx, byte [edi + eax + 0x15b4]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 0x15b5]
add esi, edx
add ecx, esi
movzx edx, byte [edi + eax + 0x15b6]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 0x15b7]
add esi, edx
add ecx, esi
movzx edx, byte [edi + eax + 0x15b8]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 0x15b9]
add esi, edx
add ecx, esi
movzx edx, byte [edi + eax + 0x15ba]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 0x15bb]
add esi, edx
add ecx, esi
movzx edx, byte [edi + eax + 0x15bc]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 0x15bd]
add esi, edx
add ecx, esi
movzx edx, byte [edi + eax + 0x15be]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 0x15bf]
add esi, edx
add ecx, esi
add eax, 0x10
jne 0x4310b0
add edi, 0x15b0
mov eax, esi
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 0x4310a0
test ebx, ebx
je 0x4312dd
cmp ebx, 0x10
jb 0x431252
nop word [eax + eax]
add ebx, 0xfffffff0
movzx eax, byte [edi]
add eax, esi
add ecx, eax
movzx edx, byte [edi + 1]
add edx, eax
add ecx, edx
movzx eax, byte [edi + 2]
add eax, edx
add ecx, eax
movzx edx, byte [edi + 3]
add edx, eax
add ecx, edx
movzx eax, byte [edi + 4]
add eax, edx
add ecx, eax
movzx edx, byte [edi + 5]
add edx, eax
add ecx, edx
movzx eax, byte [edi + 6]
add eax, edx
add ecx, eax
movzx edx, byte [edi + 7]
add edx, eax
add ecx, edx
movzx eax, byte [edi + 8]
add eax, edx
add ecx, eax
movzx edx, byte [edi + 9]
add edx, eax
add ecx, edx
movzx eax, byte [edi + 0xa]
add eax, edx
add ecx, eax
movzx edx, byte [edi + 0xb]
add edx, eax
add ecx, edx
movzx eax, byte [edi + 0xc]
add eax, edx
add ecx, eax
movzx edx, byte [edi + 0xd]
add edx, eax
add ecx, edx
movzx eax, byte [edi + 0xe]
add eax, edx
add ecx, eax
movzx esi, byte [edi + 0xf]
add esi, eax
add ecx, esi
add edi, 0x10
cmp ebx, 0xf
ja 0x4311c0
test ebx, ebx
je 0x4312ba
lea eax, [ebx - 1]
mov ebp, ebx
and ebp, 3
je 0x431284
mov dword [esp], eax
xor edx, edx
nop word cs:[eax + eax]
movzx eax, byte [edi + edx]
add esi, eax
add ecx, esi
inc edx
cmp ebp, edx
jne 0x431270
sub ebx, edx
add edi, edx
mov eax, dword [esp]
cmp eax, 3
jb 0x4312ba
xor eax, eax
nop dword [eax + eax]
movzx edx, byte [edi + eax]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 1]
add esi, edx
add ecx, esi
movzx edx, byte [edi + eax + 2]
add edx, esi
add ecx, edx
movzx esi, byte [edi + eax + 3]
add esi, edx
add ecx, esi
add eax, 4
cmp ebx, eax
jne 0x431290
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
jmp 0x431342
mov eax, ebx
cmp ebx, 4
jb 0x43131a
xor edx, edx
nop dword [eax]
movzx ebx, byte [edi + edx]
add ebx, esi
add ecx, ebx
movzx esi, byte [edi + edx + 1]
add esi, ebx
add ecx, esi
movzx ebx, byte [edi + edx + 2]
add ebx, esi
add ecx, ebx
movzx esi, byte [edi + edx + 3]
add esi, ebx
add ecx, esi
add edx, 4
cmp eax, edx
jne 0x4312f0
lea edi, [esi - 0xfff1]
cmp esi, 0xfff1
cmovb edi, esi
mov edx, 0x80078071
mov eax, ecx
mul edx
shr edx, 0xf
imul eax, edx, 0xfff1
sub ecx, eax
shl ecx, 0x10
or ecx, edi
mov eax, ecx
add esp, 4
pop esi
pop edi
pop ebx
pop ebp
ret
jmp 0x430ff0