Function at 0x51ef79
Capabilities:
Encode data using xor

Disassembly:
push ecx
mov ecx, dword [esp + 0x10]
push ebx
mov ebx, dword [esp + 0xc]
push ebp
mov ebp, dword [esp + 0x1c]
push esi
cmp dword [ebx + 0xe8], 0
push edi
mov dword [esp + 0x10], ecx
je 0x51efa2
mov eax, dword [ebx + 0x84]
sub eax, ecx
dec eax
jmp 0x51efa4
mov eax, ecx
mov esi, dword [ebx + 0xcc]
mov edi, esi
mov edx, dword [ebx + 0xd4]
imul edi, eax
mov eax, edx
imul eax, dword [esp + 0x1c]
add edi, eax
add edi, dword [ebx + 0xc8]
cmp dword [ebx + 0xe8], 0
je 0x51efcf
neg esi
cmp dword [ebx + 0xe0], 0
mov dword [esp + 0x18], esi
jne 0x51f381
cmp dword [ebx + 0xe4], 0
jne 0x51f381
mov eax, dword [ebx + 0xd8]
test al, 2
je 0x51f025
test ebp, ebp
je 0x51f3a4
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, esi
sub ebp, 1
jne 0x51efff
jmp 0x51f3a4
test eax, 0x100
je 0x51f063
test ebp, ebp
je 0x51f3a4
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, esi
sub ebp, 1
jne 0x51f034
jmp 0x51f3a4
test al, 8
je 0x51f08d
cmp edx, 4
jne 0x51f3a4
test ebp, ebp
je 0x51f3a4
mov al, byte [ebx + 0xfc]
mov byte [edi + 3], al
add edi, esi
sub ebp, 1
jne 0x51f078
jmp 0x51f3a4
test al, 0x10
je 0x51f230
test ebp, ebp
je 0x51f3a4
cmp edx, 4
jne 0x51f1dc
movzx edx, byte [edi + 3]
lea ecx, [edi + 2]
mov esi, dword [ebx + 0xfc]
mov dword [esp + 0x1c], edx
test esi, esi
jne 0x51f0c0
movzx eax, byte [ecx]
jmp 0x51f105
mov dword [esp + 0x10], ecx
test edx, edx
jne 0x51f0d0
mov eax, dword [ebx + 0xf0]
jmp 0x51f0fe
movzx eax, byte [ecx]
mov esi, dword [ebx + 0x100]
imul ecx, dword [ebx + 0xf0], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
add esi, ecx
mov ecx, dword [esp + 0x10]
cdq
idiv esi
mov edx, dword [esp + 0x1c]
mov byte [ecx], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x51f117
movzx eax, byte [edi + 1]
jmp 0x51f154
test edx, edx
jne 0x51f126
mov eax, dword [ebx + 0xf4]
cdq
idiv ecx
jmp 0x51f154
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 0x51f166
movzx eax, byte [edi]
jmp 0x51f1a6
mov edx, dword [esp + 0x1c]
test edx, edx
jne 0x51f179
mov eax, dword [ebx + 0xf8]
cdq
idiv ecx
jmp 0x51f1a6
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 [ebx + 0x100]
imul eax, dword [esp + 0x1c]
imul ecx, dword [ebx + 0xfc], 0xff
add eax, ecx
mov ecx, 0xff
cdq
idiv ecx
mov byte [edi + 3], al
add edi, dword [esp + 0x18]
sub ebp, 1
jne 0x51f0a6
jmp 0x51f3a4
mov ecx, 0xff
movzx eax, byte [edi + 2]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf0]
cdq
idiv ecx
mov byte [edi + 2], al
movzx eax, byte [edi + 1]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf4]
cdq
idiv ecx
mov byte [edi + 1], al
movzx eax, byte [edi]
imul eax, dword [ebx + 0x100]
add eax, dword [ebx + 0xf8]
cdq
idiv ecx
mov byte [edi], al
add edi, esi
sub ebp, 1
jne 0x51f1e1
jmp 0x51f3a4
test al, 0x20
je 0x51f35a
cmp edx, 4
jne 0x51f35a
test ebp, ebp
je 0x51f3a4
movzx edx, byte [edi + 3]
lea ecx, [edi + 2]
mov esi, dword [ebx + 0xfc]
mov dword [esp + 0x1c], edx
test esi, esi
jne 0x51f263
movzx eax, byte [ecx]
jmp 0x51f2a8
mov dword [esp + 0x10], ecx
test edx, edx
jne 0x51f273
mov eax, dword [ebx + 0xf0]
jmp 0x51f2a1
movzx eax, byte [ecx]
mov esi, dword [ebx + 0x100]
imul ecx, dword [ebx + 0xf0], 0xff
imul eax, esi
imul esi, edx
imul eax, edx
add eax, ecx
imul ecx, dword [ebx + 0xfc], 0xff
add esi, ecx
mov ecx, dword [esp + 0x10]
cdq
idiv esi
mov edx, dword [esp + 0x1c]
mov byte [ecx], al
mov ecx, dword [ebx + 0xfc]
test ecx, ecx
jne 0x51f2ba
movzx eax, byte [edi + 1]
jmp 0x51f2f7
test edx, edx
jne 0x51f2c9
mov eax, dword [ebx + 0xf4]
cdq
idiv ecx
jmp 0x51f2f7
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 0x51f309
movzx eax, byte [edi]
jmp 0x51f349
mov edx, dword [esp + 0x1c]
test edx, edx
jne 0x51f31c
mov eax, dword [ebx + 0xf8]
cdq
idiv ecx
jmp 0x51f349
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
add edi, dword [esp + 0x18]
sub ebp, 1
jne 0x51f249
jmp 0x51f3a4
test ebp, ebp
je 0x51f3a4
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, esi
sub ebp, 1
jne 0x51f35e
jmp 0x51f3a4
test ebp, ebp
je 0x51f3a4
push edi
push ecx
push dword [esp + 0x24]
push ebx
call fcn.0051e642
mov ecx, dword [esp + 0x20]
add esp, 0x10
add edi, esi
inc ecx
mov dword [esp + 0x10], ecx
sub ebp, 1
jne 0x51f385
pop edi
pop esi
pop ebp
pop ebx
pop ecx
ret