Function at 0x51d6cf
Capabilities:
Encode data using xor

Disassembly:
push ebx
mov ebx, dword [esp + 8]
push ebp
push esi
mov esi, dword [esp + 0x18]
mov edx, dword [ebx + 0xe8]
push edi
test edx, edx
je 0x51d6f0
mov eax, dword [ebx + 0x84]
sub eax, esi
dec eax
jmp 0x51d6f2
mov eax, esi
mov ebp, dword [ebx + 0xcc]
mov edi, ebp
mov ecx, dword [ebx + 0xd4]
imul edi, eax
mov eax, ecx
imul eax, dword [esp + 0x18]
add edi, eax
add edi, dword [ebx + 0xc8]
test edx, edx
je 0x51d718
neg ebp
cmp dword [ebx + 0xe0], 0
jne 0x51dadc
cmp dword [ebx + 0xe4], 0
jne 0x51dadc
mov eax, dword [ebx + 0xd8]
test al, 2
je 0x51d76c
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x51db00
mov al, byte [ebx + 0xf0]
xor byte [edi + 2], al
mov al, byte [ebx + 0xf4]
xor byte [edi + 1], al
mov al, byte [ebx + 0xf8]
xor byte [edi], al
add edi, ebp
dec ecx
jne 0x51d748
jmp 0x51db00
test eax, 0x100
je 0x51d7ac
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x51db00
mov al, byte [ebx + 0xf0]
mov byte [edi + 2], al
mov al, byte [ebx + 0xf4]
mov byte [edi + 1], al
mov al, byte [ebx + 0xf8]
mov byte [edi], al
mov al, byte [ebx + 0xfc]
mov byte [edi + 3], al
add edi, ebp
dec ecx
jne 0x51d77f
jmp 0x51db00
test al, 8
je 0x51d7d8
cmp ecx, 4
jne 0x51db00
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x51db00
mov al, byte [ebx + 0xfc]
mov byte [edi + 3], al
add edi, ebp
dec ecx
jne 0x51d7c5
jmp 0x51db00
test al, 0x10
je 0x51d987
cmp ecx, 4
jne 0x51d929
mov eax, dword [esp + 0x20]
jmp 0x51d918
movzx edx, byte [edi + 3]
mov ecx, dword [ebx + 0xfc]
mov dword [esp + 0x18], edx
test ecx, ecx
jne 0x51d80a
movzx eax, byte [edi + 2]
jmp 0x51d84b
test edx, edx
jne 0x51d819
mov eax, dword [ebx + 0xf0]
cdq
idiv ecx
jmp 0x51d847
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 2]
imul ecx, dword [ebx + 0xf0], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov edx, dword [esp + 0x18]
mov byte [edi + 2], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x51d85e
movzx eax, byte [edi + 1]
jmp 0x51d89b
test edx, edx
jne 0x51d86d
mov eax, dword [ebx + 0xf4]
cdq
idiv ecx
jmp 0x51d89b
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 1]
imul ecx, dword [ebx + 0xf4], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi + 1], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x51d8ad
movzx eax, byte [edi]
jmp 0x51d8ed
mov edx, dword [esp + 0x18]
test edx, edx
jne 0x51d8c0
mov eax, dword [ebx + 0xf8]
cdq
idiv ecx
jmp 0x51d8ed
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi]
imul ecx, dword [ebx + 0xf8], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi], al
imul ecx, dword [ebx + 0xfc], 0xff
mov eax, dword [ebx + 0x100]
imul eax, dword [esp + 0x18]
add eax, ecx
mov ecx, 0xff
cdq
idiv ecx
mov byte [edi + 3], al
mov eax, dword [esp + 0x14]
dec eax
add edi, ebp
mov dword [esp + 0x14], eax
test eax, eax
jne 0x51d7f2
jmp 0x51db00
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x51db00
mov esi, 0xff
movzx eax, byte [edi + 2]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf0]
cdq
idiv esi
mov byte [edi + 2], al
movzx eax, byte [edi + 1]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf4]
cdq
idiv esi
mov byte [edi + 1], al
movzx eax, byte [edi]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf8]
cdq
idiv esi
mov byte [edi], al
add edi, ebp
dec ecx
jne 0x51d93a
jmp 0x51db00
test al, 0x20
je 0x51dab3
cmp ecx, 4
jne 0x51dab3
mov eax, dword [esp + 0x20]
jmp 0x51daa5
movzx edx, byte [edi + 3]
mov ecx, dword [ebx + 0xfc]
mov dword [esp + 0x18], edx
test ecx, ecx
jne 0x51d9b9
movzx eax, byte [edi + 2]
jmp 0x51d9fa
test edx, edx
jne 0x51d9c8
mov eax, dword [ebx + 0xf0]
cdq
idiv ecx
jmp 0x51d9f6
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 2]
imul ecx, dword [ebx + 0xf0], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov edx, dword [esp + 0x18]
mov byte [edi + 2], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x51da0d
movzx eax, byte [edi + 1]
jmp 0x51da4a
test edx, edx
jne 0x51da1c
mov eax, dword [ebx + 0xf4]
cdq
idiv ecx
jmp 0x51da4a
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi + 1]
imul ecx, dword [ebx + 0xf4], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi + 1], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x51da5c
movzx eax, byte [edi]
jmp 0x51da9c
mov edx, dword [esp + 0x18]
test edx, edx
jne 0x51da6f
mov eax, dword [ebx + 0xf8]
cdq
idiv ecx
jmp 0x51da9c
mov esi, dword [ebx + 0x100]
movzx eax, byte [edi]
imul ecx, dword [ebx + 0xf8], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
cdq
add esi, ecx
idiv esi
mov byte [edi], al
mov eax, dword [esp + 0x14]
dec eax
add edi, ebp
mov dword [esp + 0x14], eax
test eax, eax
jne 0x51d9a1
jmp 0x51db00
mov ecx, dword [esp + 0x20]
test ecx, ecx
je 0x51db00
mov al, byte [ebx + 0xf0]
mov byte [edi + 2], al
mov al, byte [ebx + 0xf4]
mov byte [edi + 1], al
mov al, byte [ebx + 0xf8]
mov byte [edi], al
add edi, ebp
dec ecx
jne 0x51dabb
jmp 0x51db00
mov eax, dword [esp + 0x20]
mov dword [esp + 0x14], eax
test eax, eax
je 0x51db00
push edi
push esi
push dword [esp + 0x20]
push ebx
call fcn.0051d201
add esp, 0x10
add edi, ebp
inc esi
dec dword [esp + 0x14]
jne 0x51dae8
pop edi
pop esi
pop ebp
pop ebx
ret