Function at 0x4d4d19
Capabilities:
Encrypt data using speck

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x38
push ebx
xor ebx, ebx
test byte [ebp + 0x10], 0x80
push esi
push edi
mov esi, eax
mov dword [ebp - 0x24], ebx
mov dword [ebp - 0x28], ebx
mov byte [ebp - 2], bl
mov dword [ebp - 0x38], 0xc
mov dword [ebp - 0x34], ebx
je 0x4d4d48
mov dword [ebp - 0x30], ebx
mov byte [ebp - 1], 0x10
jmp 0x4d4d52
mov dword [ebp - 0x30], 1
mov byte [ebp - 1], bl
lea eax, [ebp - 0x24]
push eax
call fcn.004bd942
test eax, eax
pop ecx
je 0x4d4d6d
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.004b8b1b
add esp, 0x14
lea eax, [ebp - 0x28]
push eax
call fcn.004baa19
test eax, eax
pop ecx
je 0x4d4d88
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.004b8b1b
add esp, 0x14
mov ecx, dword [ebp + 0x10]
mov eax, 0x8000
test eax, ecx
jne 0x4d4da5
test ecx, 0x74000
jne 0x4d4da1
cmp dword [ebp - 0x24], eax
je 0x4d4da5
or byte [ebp - 1], 0x80
mov eax, ecx
and eax, 3
sub eax, ebx
mov edx, 0xc0000000
mov edi, accept
je 0x4d4dff
dec eax
je 0x4d4de9
dec eax
je 0x4d4de4
call fcn.004bd363
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.004bd350
push 0x16
pop esi
push ebx
push ebx
push ebx
push ebx
push ebx
mov dword [eax], esi
call fcn.004b8c17
add esp, 0x14
jmp 0x4d53b2
mov dword [ebp - 8], edx
jmp 0x4d4e02
test cl, 8
je 0x4d4df6
test ecx, 0x70000
jne 0x4d4de4
mov dword [ebp - 8], 0x40000000
jmp 0x4d4e02
mov dword [ebp - 8], edi
mov eax, dword [ebp + 0x14]
push 0x10
pop ecx
sub eax, ecx
je 0x4d4e43
sub eax, ecx
je 0x4d4e3a
sub eax, ecx
je 0x4d4e31
sub eax, ecx
je 0x4d4e28
sub eax, 0x40
jne 0x4d4dbe
cmp dword [ebp - 8], edi
sete al
mov dword [ebp - 0x10], eax
jmp 0x4d4e46
mov dword [ebp - 0x10], 3
jmp 0x4d4e46
mov dword [ebp - 0x10], 2
jmp 0x4d4e46
mov dword [ebp - 0x10], 1
jmp 0x4d4e46
mov dword [ebp - 0x10], ebx
mov eax, dword [ebp + 0x10]
mov edx, 0x700
and eax, edx
mov ecx, 0x400
cmp eax, ecx
mov edi, 0x100
jg 0x4d4e99
je 0x4d4e90
cmp eax, ebx
je 0x4d4e90
cmp eax, edi
je 0x4d4e87
cmp eax, 0x200
je 0x4d4f0c
cmp eax, 0x300
jne 0x4d4dbe
mov dword [ebp - 0x14], 2
jmp 0x4d4eb6
mov dword [ebp - 0x14], 4
jmp 0x4d4eb6
mov dword [ebp - 0x14], 3
jmp 0x4d4eb6
cmp eax, 0x500
je 0x4d4eaf
cmp eax, 0x600
je 0x4d4f0c
cmp eax, edx
jne 0x4d4dbe
mov dword [ebp - 0x14], 1
mov eax, dword [ebp + 0x10]
test edi, eax
mov dword [ebp - 0xc], 0x80
je 0x4d4eda
mov ecx, dword [0x54a6e4]
not ecx
and ecx, dword [ebp + 0x18]
test cl, cl
js 0x4d4eda
mov dword [ebp - 0xc], 1
test al, 0x40
je 0x4d4ef6
or dword [ebp - 0xc], 0x4000000
or dword [ebp - 8], 0x10000
cmp dword [ebp - 0x28], 2
jne 0x4d4ef6
or dword [ebp - 0x10], 4
test ax, 0x1000
je 0x4d4eff
or dword [ebp - 0xc], edi
test al, 0x20
je 0x4d4f15
or dword [ebp - 0xc], 0x8000000
jmp 0x4d4f20
mov dword [ebp - 0x14], 5
jmp 0x4d4eb6
test al, 0x10
je 0x4d4f20
or dword [ebp - 0xc], 0x10000000
call fcn.004ca3c1
cmp eax, 0xffffffff
mov dword [esi], eax
jne 0x4d4f46
call fcn.004bd363
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.004bd350
mov dword [eax], 0x18
jmp 0x4d4fd4
mov eax, dword [ebp + 8]
mov edi, dword [sym.imp.KERNEL32.dll_CreateFileW]
push ebx
push dword [ebp - 0xc]
mov dword [eax], 1
push dword [ebp - 0x14]
lea eax, [ebp - 0x38]
push eax
push dword [ebp - 0x10]
push dword [ebp - 8]
push dword [ebp + 0xc]
call edi
cmp eax, 0xffffffff
mov dword [ebp - 0x1c], eax
jne 0x4d4fe0
mov ecx, dword [ebp - 8]
mov eax, 0xc0000000
and ecx, eax
cmp ecx, eax
jne 0x4d4fac
test byte [ebp + 0x10], 1
je 0x4d4fac
and dword [ebp - 8], 0x7fffffff
push ebx
push dword [ebp - 0xc]
lea eax, [ebp - 0x38]
push dword [ebp - 0x14]
push eax
push dword [ebp - 0x10]
push dword [ebp - 8]
push dword [ebp + 0xc]
call edi
cmp eax, 0xffffffff
mov dword [ebp - 0x1c], eax
jne 0x4d4fe0
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x54bdc0]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.004bd376
pop ecx
call fcn.004bd350
mov eax, dword [eax]
jmp 0x4d546e
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_GetFileType]
cmp eax, ebx
jne 0x4d5031
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x54bdc0]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov esi, eax
push esi
call fcn.004bd376
pop ecx
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp esi, ebx
jne 0x4d4fd4
call fcn.004bd350
mov dword [eax], 0xd
jmp 0x4d4fd4
cmp eax, 2
jne 0x4d503c
or byte [ebp - 1], 0x40
jmp 0x4d5045
cmp eax, 3
jne 0x4d5045
or byte [ebp - 1], 8
push dword [ebp - 0x1c]
push dword [esi]
call fcn.004ca190
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x54bdc0]
pop ecx
pop ecx
mov cl, byte [ebp - 1]
or cl, 1
mov byte [edx + eax + 4], cl
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x54bdc0]
lea eax, [edx + eax + 0x24]
and byte [eax], 0x80
mov byte [ebp - 3], cl
and byte [ebp - 3], 0x48
mov byte [ebp - 1], cl
jne 0x4d511b
test cl, 0x80
je 0x4d51eb
test byte [ebp + 0x10], 2
je 0x4d511b
push 2
or edi, 0xffffffff
push edi
push dword [esi]
call fcn.004c5b65
add esp, 0xc
cmp eax, edi
mov dword [ebp - 0x18], eax
jne 0x4d50d9
call fcn.004bd363
cmp dword [eax], 0x83
je 0x4d511b
push dword [esi]
call fcn.004c5874
jmp 0x4d4fd3
push 1
lea eax, [ebp - 0x2c]
push eax
push dword [esi]
mov dword [ebp - 0x2c], ebx
call fcn.004c5dd3
add esp, 0xc
test eax, eax
jne 0x4d510b
cmp word [ebp - 0x2c], 0x1a
jne 0x4d510b
mov eax, dword [ebp - 0x18]
cdq
push edx
push eax
push dword [esi]
call fcn.004d5a56
add esp, 0xc
cmp eax, edi
je 0x4d50cd
push ebx
push ebx
push dword [esi]
call fcn.004c5b65
add esp, 0xc
cmp eax, edi
je 0x4d50cd
test byte [ebp - 1], 0x80
je 0x4d51eb
mov ecx, 0x74000
test dword [ebp + 0x10], ecx
mov edi, 0x4000
jne 0x4d5143
mov eax, dword [ebp - 0x24]
and eax, ecx
jne 0x4d5140
or dword [ebp + 0x10], edi
jmp 0x4d5143
or dword [ebp + 0x10], eax
mov eax, dword [ebp + 0x10]
and eax, ecx
cmp eax, edi
je 0x4d5190
cmp eax, 0x10000
je 0x4d517c
cmp eax, 0x14000
je 0x4d517c
cmp eax, 0x20000
je 0x4d518a
cmp eax, 0x24000
je 0x4d518a
cmp eax, 0x40000
je 0x4d5176
cmp eax, 0x44000
jne 0x4d5193
mov byte [ebp - 2], 1
jmp 0x4d5193
mov ecx, dword [ebp + 0x10]
mov eax, 0x301
and ecx, eax
cmp ecx, eax
jne 0x4d5193
mov byte [ebp - 2], 2
jmp 0x4d5193
mov byte [ebp - 2], bl
test dword [ebp + 0x10], 0x70000
je 0x4d51eb
test byte [ebp - 1], 0x40
mov dword [ebp - 0x18], ebx
jne 0x4d51eb
mov eax, dword [ebp - 8]
mov ecx, 0xc0000000
and eax, ecx
cmp eax, 0x40000000
je 0x4d5345
cmp eax, 0x80000000
je 0x4d530c
cmp eax, ecx
jne 0x4d51eb
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x4d51eb
cmp eax, 2
jbe 0x4d53ed
cmp eax, 4
jbe 0x4d52de
cmp eax, 5
je 0x4d53ed
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x54bdc0]
lea eax, [ecx + eax + 0x24]
mov cl, byte [eax]
xor cl, byte [ebp - 2]
and cl, 0x7f
xor byte [eax], cl
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x54bdc0]
lea eax, [ecx + eax + 0x24]
mov ecx, dword [ebp + 0x10]
mov dl, byte [eax]
shr ecx, 0x10
shl cl, 7
and dl, 0x7f
or cl, dl
cmp byte [ebp - 3], bl
mov byte [eax], cl
jne 0x4d525d
test byte [ebp + 0x10], 8
je 0x4d525d
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x54bdc0]
lea eax, [ecx + eax + 4]
or byte [eax], 0x20
mov edi, dword [ebp - 8]
mov eax, 0xc0000000
mov ecx, edi
and ecx, eax
cmp ecx, eax
jne 0x4d546c
test byte [ebp + 0x10], 1
je 0x4d546c
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push ebx
push dword [ebp - 0xc]
lea eax, [ebp - 0x38]
push 3
push eax
push dword [ebp - 0x10]
and edi, 0x7fffffff
push edi
push dword [ebp + 0xc]
call dword [sym.imp.KERNEL32.dll_CreateFileW]
cmp eax, 0xffffffff
jne 0x4d5455
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.004bd376
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x54bdc0]
lea eax, [ecx + eax + 4]
and byte [eax], 0xfe
push dword [esi]
call fcn.004ca20d
pop ecx
jmp 0x4d4fd3
push 2
push ebx
push ebx
push dword [esi]
call fcn.004d231c
add esp, 0x10
or eax, edx
je 0x4d53ed
push ebx
push ebx
push ebx
push dword [esi]
call fcn.004d231c
and eax, edx
add esp, 0x10
cmp eax, 0xffffffff
je 0x4d50cd
push 3
lea eax, [ebp - 0x18]
push eax
push dword [esi]
call fcn.004c5dd3
add esp, 0xc
cmp eax, 0xffffffff
je 0x4d50cd
cmp eax, 2
je 0x4d5391
cmp eax, 3
jne 0x4d53df
cmp dword [ebp - 0x18], 0xbfbbef
jne 0x4d5391
mov byte [ebp - 2], 1
jmp 0x4d51eb
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x4d51eb
cmp eax, 2
jbe 0x4d53ed
cmp eax, 4
ja 0x4d51e2
push 2
push ebx
push ebx
push dword [esi]
call fcn.004d231c
add esp, 0x10
or eax, edx
je 0x4d53ed
push ebx
push ebx
push ebx
push dword [esi]
call fcn.004d231c
add esp, 0x10
and eax, edx
cmp eax, 0xffffffff
jne 0x4d51eb
jmp 0x4d50cd
mov eax, dword [ebp - 0x18]
and eax, 0xffff
cmp eax, 0xfffe
jne 0x4d53b9
push dword [esi]
call fcn.004c5874
pop ecx
call fcn.004bd350
push 0x16
pop esi
mov dword [eax], esi
mov eax, esi
jmp 0x4d546e
cmp eax, 0xfeff
jne 0x4d53df
push ebx
push 2
push dword [esi]
call fcn.004c5b65
add esp, 0xc
cmp eax, 0xffffffff
je 0x4d50cd
mov byte [ebp - 2], 2
jmp 0x4d51eb
push ebx
push ebx
push dword [esi]
call fcn.004c5b65
add esp, 0xc
jmp 0x4d5383
movsx eax, byte [ebp - 2]
xor edi, edi
dec eax
je 0x4d540d
dec eax
jne 0x4d51eb
mov dword [ebp - 0x18], 0xfeff
mov dword [ebp - 0x14], 2
jmp 0x4d541b
mov dword [ebp - 0x18], 0xbfbbef
mov dword [ebp - 0x14], 3
mov eax, dword [ebp - 0x14]
sub eax, edi
push eax
lea eax, [ebp + edi - 0x18]
push eax
push dword [esi]
call fcn.004c9fd3
add esp, 0xc
cmp eax, 0xffffffff
je 0x4d5441
add edi, eax
cmp dword [ebp - 0x14], edi
jg 0x4d541b
jmp 0x4d51eb
push dword [esi]
call fcn.004c5874
pop ecx
call fcn.004bd350
mov eax, dword [eax]
mov dword [ebp - 0x20], eax
jmp 0x4d546e
mov esi, dword [esi]
mov ecx, esi
sar ecx, 5
mov ecx, dword [ecx*4 + 0x54bdc0]
and esi, 0x1f
imul esi, esi, 0x38
mov dword [esi + ecx], eax
mov eax, ebx
pop edi
pop esi
pop ebx
leave
ret