Function at 0x531b10
Capabilities:
Encode data using xor
Encrypt data using rc4 ksa
Hash data with crc32

Disassembly:
push ebp
mov ebp, esp
add esp, 0xffffffac
push ebx
push esi
push edi
mov ebx, dword [ebp + 0xc]
mov ecx, dword [ebp + 8]
test ebx, ebx
jne 0x531b2a
xor eax, eax
jmp 0x531fe4
not ecx
and ecx, 0xffffffff
cmp dword [ebp + 0x10], 0x17
jb 0x531ec5
jmp 0x531b59
dec dword [ebp + 0x10]
xor eax, eax
mov al, byte [ebx]
mov edx, ecx
xor ecx, eax
and ecx, 0xff
shr edx, 8
xor edx, dword [ecx*4 + 0x6342b8]
inc ebx
mov ecx, edx
cmp dword [ebp + 0x10], 0
je 0x531b64
test bl, 3
jne 0x531b3b
mov eax, dword [ebp + 0x10]
mov esi, 0x14
xor edx, edx
div esi
mov dword [ebp - 4], eax
mov eax, dword [ebp - 4]
shl eax, 2
lea eax, [eax + eax*4]
sub dword [ebp + 0x10], eax
mov dword [ebp - 8], ebx
mov dword [ebp - 0xc], 1
cmp byte [ebp - 0xc], 0
je 0x531d2a
mov esi, ecx
xor eax, eax
mov dword [ebp - 0x14], eax
xor edx, edx
mov dword [ebp - 0x1c], edx
xor ecx, ecx
mov dword [ebp - 0x24], ecx
xor edi, edi
mov dword [ebp - 0x2c], edi
jmp 0x531cba
mov eax, dword [ebp - 8]
xor esi, dword [eax]
mov dword [ebp - 0x10], esi
mov edx, dword [ebp - 8]
mov ecx, dword [edx + 4]
xor ecx, dword [ebp - 0x14]
mov dword [ebp - 0x18], ecx
mov eax, dword [ebp - 8]
mov edx, dword [eax + 8]
xor edx, dword [ebp - 0x1c]
mov dword [ebp - 0x20], edx
mov ecx, dword [ebp - 8]
mov eax, dword [ecx + 0xc]
xor eax, dword [ebp - 0x24]
mov dword [ebp - 0x28], eax
mov edx, dword [ebp - 8]
mov ecx, dword [edx + 0x10]
xor ecx, dword [ebp - 0x2c]
mov dword [ebp - 0x30], ecx
add dword [ebp - 8], 0x14
mov eax, dword [ebp - 0x10]
and eax, 0xff
mov esi, dword [eax*4 + 0x634ab8]
mov eax, dword [ebp - 0x18]
and eax, 0xff
mov edx, dword [eax*4 + 0x634ab8]
mov dword [ebp - 0x14], edx
mov ecx, dword [ebp - 0x20]
and ecx, 0xff
mov edi, dword [ecx*4 + 0x634ab8]
mov dword [ebp - 0x1c], edi
mov eax, dword [ebp - 0x28]
and eax, 0xff
mov edx, dword [eax*4 + 0x634ab8]
mov eax, 1
mov dword [ebp - 0x24], edx
mov edx, 0x634eb8
mov ecx, dword [ebp - 0x30]
and ecx, 0xff
mov edi, dword [ecx*4 + 0x634ab8]
mov dword [ebp - 0x2c], edi
mov ebx, eax
mov edi, dword [ebp - 0x10]
shl ebx, 3
mov ecx, ebx
shr edi, cl
and edi, 0xff
mov ecx, ebx
xor esi, dword [edx + edi*4]
mov edi, dword [ebp - 0x18]
shr edi, cl
and edi, 0xff
mov ecx, dword [edx + edi*4]
xor dword [ebp - 0x14], ecx
mov ecx, ebx
mov edi, dword [ebp - 0x20]
shr edi, cl
and edi, 0xff
mov ecx, dword [edx + edi*4]
xor dword [ebp - 0x1c], ecx
mov ecx, ebx
mov edi, dword [ebp - 0x28]
shr edi, cl
and edi, 0xff
mov ecx, dword [edx + edi*4]
xor dword [ebp - 0x24], ecx
mov ecx, ebx
mov ebx, dword [ebp - 0x30]
shr ebx, cl
and ebx, 0xff
mov ecx, dword [edx + ebx*4]
xor dword [ebp - 0x2c], ecx
inc eax
add edx, 0x400
cmp eax, 4
jl 0x531c4d
dec dword [ebp - 4]
jne 0x531bae
mov eax, dword [ebp - 8]
xor esi, dword [eax]
push esi
call fcn.00531ac4
pop ecx
mov ecx, eax
mov eax, dword [ebp - 8]
mov edx, dword [eax + 4]
xor edx, dword [ebp - 0x14]
xor ecx, edx
push ecx
call fcn.00531ac4
mov ebx, dword [ebp - 8]
pop ecx
mov ecx, eax
mov eax, dword [ebx + 8]
xor eax, dword [ebp - 0x1c]
xor ecx, eax
push ecx
call fcn.00531ac4
mov edx, dword [ebp - 8]
pop ecx
mov ecx, eax
mov ebx, dword [edx + 0xc]
xor ebx, dword [ebp - 0x24]
xor ecx, ebx
push ecx
call fcn.00531ac4
pop ecx
mov ecx, eax
mov eax, dword [ebp - 8]
mov edx, dword [eax + 0x10]
xor edx, dword [ebp - 0x2c]
xor ecx, edx
push ecx
call fcn.00531ac4
pop ecx
add dword [ebp - 8], 0x14
mov ecx, eax
jmp 0x531ec2
push ecx
call fcn.005319dc
pop ecx
mov esi, eax
xor eax, eax
mov dword [ebp - 0x38], eax
xor edx, edx
mov dword [ebp - 0x40], edx
xor ecx, ecx
mov dword [ebp - 0x48], ecx
xor edi, edi
mov dword [ebp - 0x50], edi
jmp 0x531e58
mov eax, dword [ebp - 8]
xor esi, dword [eax]
mov dword [ebp - 0x34], esi
mov edx, dword [ebp - 8]
mov ecx, dword [edx + 4]
xor ecx, dword [ebp - 0x38]
mov dword [ebp - 0x3c], ecx
mov eax, dword [ebp - 8]
mov edx, dword [eax + 8]
xor edx, dword [ebp - 0x40]
mov dword [ebp - 0x44], edx
mov ecx, dword [ebp - 8]
mov eax, dword [ecx + 0xc]
xor eax, dword [ebp - 0x48]
mov dword [ebp - 0x4c], eax
mov edx, dword [ebp - 8]
mov ecx, dword [edx + 0x10]
xor ecx, dword [ebp - 0x50]
mov dword [ebp - 0x54], ecx
add dword [ebp - 8], 0x14
mov eax, dword [ebp - 0x34]
and eax, 0xff
mov esi, dword [eax*4 + 0x635ab8]
mov eax, dword [ebp - 0x3c]
and eax, 0xff
mov edx, dword [eax*4 + 0x635ab8]
mov dword [ebp - 0x38], edx
mov ecx, dword [ebp - 0x44]
and ecx, 0xff
mov edi, dword [ecx*4 + 0x635ab8]
mov dword [ebp - 0x40], edi
mov eax, dword [ebp - 0x4c]
and eax, 0xff
mov edx, dword [eax*4 + 0x635ab8]
mov eax, 1
mov dword [ebp - 0x48], edx
mov edx, 0x635eb8
mov ecx, dword [ebp - 0x54]
and ecx, 0xff
mov edi, dword [ecx*4 + 0x635ab8]
mov dword [ebp - 0x50], edi
mov ebx, eax
mov edi, dword [ebp - 0x34]
shl ebx, 3
mov ecx, ebx
shr edi, cl
and edi, 0xff
mov ecx, ebx
xor esi, dword [edx + edi*4]
mov edi, dword [ebp - 0x3c]
shr edi, cl
and edi, 0xff
mov ecx, dword [edx + edi*4]
xor dword [ebp - 0x38], ecx
mov ecx, ebx
mov edi, dword [ebp - 0x44]
shr edi, cl
and edi, 0xff
mov ecx, dword [edx + edi*4]
xor dword [ebp - 0x40], ecx
mov ecx, ebx
mov edi, dword [ebp - 0x4c]
shr edi, cl
and edi, 0xff
mov ecx, dword [edx + edi*4]
xor dword [ebp - 0x48], ecx
mov ecx, ebx
mov ebx, dword [ebp - 0x54]
shr ebx, cl
and ebx, 0xff
mov ecx, dword [edx + ebx*4]
xor dword [ebp - 0x50], ecx
inc eax
add edx, 0x400
cmp eax, 4
jl 0x531deb
dec dword [ebp - 4]
jne 0x531d4c
mov eax, dword [ebp - 8]
xor esi, dword [eax]
push esi
call fcn.00531ae8
pop ecx
mov edx, dword [ebp - 8]
mov edx, dword [edx + 4]
xor edx, dword [ebp - 0x38]
xor eax, edx
push eax
call fcn.00531ae8
pop ecx
mov ecx, dword [ebp - 8]
mov edx, dword [ecx + 8]
xor edx, dword [ebp - 0x40]
xor eax, edx
push eax
call fcn.00531ae8
pop ecx
mov ecx, dword [ebp - 8]
mov edx, dword [ecx + 0xc]
xor edx, dword [ebp - 0x48]
xor eax, edx
push eax
call fcn.00531ae8
pop ecx
mov ecx, dword [ebp - 8]
mov edx, dword [ecx + 0x10]
xor edx, dword [ebp - 0x50]
xor eax, edx
push eax
call fcn.00531ae8
pop ecx
add dword [ebp - 8], 0x14
push eax
call fcn.005319dc
pop ecx
mov ecx, eax
mov ebx, dword [ebp - 8]
cmp dword [ebp + 0x10], 8
jb 0x531fb5
sub dword [ebp + 0x10], 8
xor edx, edx
mov eax, ecx
mov dl, byte [ebx]
inc ebx
xor ecx, edx
xor edx, edx
and ecx, 0xff
mov dl, byte [ebx]
shr eax, 8
inc ebx
xor eax, dword [ecx*4 + 0x6342b8]
mov ecx, eax
mov eax, ecx
xor ecx, edx
and ecx, 0xff
xor edx, edx
shr eax, 8
mov dl, byte [ebx]
xor eax, dword [ecx*4 + 0x6342b8]
inc ebx
mov ecx, eax
mov eax, ecx
xor ecx, edx
and ecx, 0xff
xor edx, edx
shr eax, 8
mov dl, byte [ebx]
xor eax, dword [ecx*4 + 0x6342b8]
inc ebx
mov ecx, eax
mov eax, ecx
xor ecx, edx
and ecx, 0xff
xor edx, edx
shr eax, 8
mov dl, byte [ebx]
xor eax, dword [ecx*4 + 0x6342b8]
inc ebx
mov ecx, eax
mov eax, ecx
xor ecx, edx
and ecx, 0xff
xor edx, edx
shr eax, 8
mov dl, byte [ebx]
xor eax, dword [ecx*4 + 0x6342b8]
inc ebx
mov ecx, eax
mov eax, ecx
xor ecx, edx
and ecx, 0xff
xor edx, edx
shr eax, 8
mov dl, byte [ebx]
xor eax, dword [ecx*4 + 0x6342b8]
inc ebx
mov ecx, eax
mov eax, ecx
xor ecx, edx
and ecx, 0xff
xor edx, edx
shr eax, 8
mov dl, byte [ebx]
xor eax, dword [ecx*4 + 0x6342b8]
mov ecx, eax
mov eax, ecx
xor ecx, edx
and ecx, 0xff
shr eax, 8
xor eax, dword [ecx*4 + 0x6342b8]
inc ebx
mov ecx, eax
cmp dword [ebp + 0x10], 8
jae 0x531ecf
cmp dword [ebp + 0x10], 0
je 0x531fdf
dec dword [ebp + 0x10]
xor edx, edx
mov dl, byte [ebx]
mov eax, ecx
xor ecx, edx
and ecx, 0xff
shr eax, 8
xor eax, dword [ecx*4 + 0x6342b8]
inc ebx
mov ecx, eax
cmp dword [ebp + 0x10], 0
jne 0x531fbb
mov eax, ecx
xor eax, 0xffffffff
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret