Function at 0x507b5b
Capabilities:
Encrypt data using speck

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x34
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 - 0x34], 0xc
mov dword [ebp - 0x30], ebx
je 0x507b8a
mov dword [ebp - 0x2c], ebx
mov byte [ebp - 1], 0x10
jmp 0x507b94
mov dword [ebp - 0x2c], 1
mov byte [ebp - 1], bl
lea eax, [ebp - 0x24]
push eax
call fcn.004f6d61
test eax, eax
pop ecx
je 0x507baf
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.004ee7ee
add esp, 0x14
lea eax, [ebp - 0x28]
push eax
call fcn.004f461c
test eax, eax
pop ecx
je 0x507bca
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.004ee7ee
add esp, 0x14
mov ecx, dword [ebp + 0x10]
mov eax, 0x8000
test eax, ecx
jne 0x507be7
test ecx, 0x74000
jne 0x507be3
cmp dword [ebp - 0x24], eax
je 0x507be7
or byte [ebp - 1], 0x80
mov eax, ecx
and eax, 3
sub eax, ebx
mov edx, 0xc0000000
mov edi, SysReAllocString
je 0x507c41
dec eax
je 0x507c2b
dec eax
je 0x507c26
call fcn.004f5c43
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.004f5c30
push 0x16
pop esi
push ebx
push ebx
push ebx
push ebx
push ebx
mov dword [eax], esi
call fcn.004ee8ea
add esp, 0x14
jmp 0x5081f3
mov dword [ebp - 8], edx
jmp 0x507c44
test cl, 8
je 0x507c38
test ecx, 0x70000
jne 0x507c26
mov dword [ebp - 8], 0x40000000
jmp 0x507c44
mov dword [ebp - 8], edi
mov eax, dword [ebp + 0x14]
push 0x10
pop ecx
sub eax, ecx
je 0x507c85
sub eax, ecx
je 0x507c7c
sub eax, ecx
je 0x507c73
sub eax, ecx
je 0x507c6a
sub eax, 0x40
jne 0x507c00
cmp dword [ebp - 8], edi
sete al
mov dword [ebp - 0x10], eax
jmp 0x507c88
mov dword [ebp - 0x10], 3
jmp 0x507c88
mov dword [ebp - 0x10], 2
jmp 0x507c88
mov dword [ebp - 0x10], 1
jmp 0x507c88
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 0x507cdb
je 0x507cd2
cmp eax, ebx
je 0x507cd2
cmp eax, edi
je 0x507cc9
cmp eax, 0x200
je 0x507d4e
cmp eax, 0x300
jne 0x507c00
mov dword [ebp - 0x14], 2
jmp 0x507cf8
mov dword [ebp - 0x14], 4
jmp 0x507cf8
mov dword [ebp - 0x14], 3
jmp 0x507cf8
cmp eax, 0x500
je 0x507cf1
cmp eax, 0x600
je 0x507d4e
cmp eax, edx
jne 0x507c00
mov dword [ebp - 0x14], 1
mov eax, dword [ebp + 0x10]
test edi, eax
mov dword [ebp - 0xc], 0x80
je 0x507d1c
mov ecx, dword [0x55db74]
not ecx
and ecx, dword [ebp + 0x18]
test cl, cl
js 0x507d1c
mov dword [ebp - 0xc], 1
test al, 0x40
je 0x507d38
or dword [ebp - 0xc], 0x4000000
or dword [ebp - 8], 0x10000
cmp dword [ebp - 0x28], 2
jne 0x507d38
or dword [ebp - 0x10], 4
test ax, 0x1000
je 0x507d41
or dword [ebp - 0xc], edi
test al, 0x20
je 0x507d57
or dword [ebp - 0xc], 0x8000000
jmp 0x507d62
mov dword [ebp - 0x14], 5
jmp 0x507cf8
test al, 0x10
je 0x507d62
or dword [ebp - 0xc], 0x10000000
call fcn.004f1b3b
cmp eax, 0xffffffff
mov dword [esi], eax
jne 0x507d88
call fcn.004f5c43
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.004f5c30
mov dword [eax], 0x18
jmp 0x507e16
mov eax, dword [ebp + 8]
mov edi, dword [sym.imp.KERNEL32.dll_CreateFileA]
push ebx
push dword [ebp - 0xc]
mov dword [eax], 1
push dword [ebp - 0x14]
lea eax, [ebp - 0x34]
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 0x507e22
mov ecx, dword [ebp - 8]
mov eax, 0xc0000000
and ecx, eax
cmp ecx, eax
jne 0x507dee
test byte [ebp + 0x10], 1
je 0x507dee
and dword [ebp - 8], 0x7fffffff
push ebx
push dword [ebp - 0xc]
lea eax, [ebp - 0x34]
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 0x507e22
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x55ef40]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.004f5c56
pop ecx
call fcn.004f5c30
mov eax, dword [eax]
jmp 0x5082af
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_GetFileType]
cmp eax, ebx
jne 0x507e73
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x55ef40]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov esi, eax
push esi
call fcn.004f5c56
pop ecx
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp esi, ebx
jne 0x507e16
call fcn.004f5c30
mov dword [eax], 0xd
jmp 0x507e16
cmp eax, 2
jne 0x507e7e
or byte [ebp - 1], 0x40
jmp 0x507e87
cmp eax, 3
jne 0x507e87
or byte [ebp - 1], 8
push dword [ebp - 0x1c]
push dword [esi]
call fcn.004f190a
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x55ef40]
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 + 0x55ef40]
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 0x507f5c
test cl, 0x80
je 0x50802c
test byte [ebp + 0x10], 2
je 0x507f5c
push 2
or edi, 0xffffffff
push edi
push dword [esi]
call fcn.004fc0ec
add esp, 0xc
cmp eax, edi
mov dword [ebp - 0x18], eax
jne 0x507f1b
call fcn.004f5c43
cmp dword [eax], 0x83
je 0x507f5c
push dword [esi]
call fcn.004fbccb
jmp 0x507e15
push 1
lea eax, [ebp - 4]
push eax
push dword [esi]
mov byte [ebp - 4], bl
call fcn.004fd0b5
add esp, 0xc
test eax, eax
jne 0x507f4c
cmp byte [ebp - 4], 0x1a
jne 0x507f4c
mov eax, dword [ebp - 0x18]
cdq
push edx
push eax
push dword [esi]
call fcn.004f11e4
add esp, 0xc
cmp eax, edi
je 0x507f0f
push ebx
push ebx
push dword [esi]
call fcn.004fc0ec
add esp, 0xc
cmp eax, edi
je 0x507f0f
test byte [ebp - 1], 0x80
je 0x50802c
mov ecx, 0x74000
test dword [ebp + 0x10], ecx
mov edi, 0x4000
jne 0x507f84
mov eax, dword [ebp - 0x24]
and eax, ecx
jne 0x507f81
or dword [ebp + 0x10], edi
jmp 0x507f84
or dword [ebp + 0x10], eax
mov eax, dword [ebp + 0x10]
and eax, ecx
cmp eax, edi
je 0x507fd1
cmp eax, 0x10000
je 0x507fbd
cmp eax, 0x14000
je 0x507fbd
cmp eax, 0x20000
je 0x507fcb
cmp eax, 0x24000
je 0x507fcb
cmp eax, 0x40000
je 0x507fb7
cmp eax, 0x44000
jne 0x507fd4
mov byte [ebp - 2], 1
jmp 0x507fd4
mov ecx, dword [ebp + 0x10]
mov eax, 0x301
and ecx, eax
cmp ecx, eax
jne 0x507fd4
mov byte [ebp - 2], 2
jmp 0x507fd4
mov byte [ebp - 2], bl
test dword [ebp + 0x10], 0x70000
je 0x50802c
test byte [ebp - 1], 0x40
mov dword [ebp - 0x18], ebx
jne 0x50802c
mov eax, dword [ebp - 8]
mov ecx, 0xc0000000
and eax, ecx
cmp eax, 0x40000000
je 0x508186
cmp eax, 0x80000000
je 0x50814d
cmp eax, ecx
jne 0x50802c
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x50802c
cmp eax, 2
jbe 0x50822e
cmp eax, 4
jbe 0x50811f
cmp eax, 5
je 0x50822e
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x55ef40]
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 + 0x55ef40]
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 0x50809e
test byte [ebp + 0x10], 8
je 0x50809e
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x55ef40]
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 0x5082ad
test byte [ebp + 0x10], 1
je 0x5082ad
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push ebx
push dword [ebp - 0xc]
lea eax, [ebp - 0x34]
push 3
push eax
push dword [ebp - 0x10]
and edi, 0x7fffffff
push edi
push dword [ebp + 0xc]
call dword [sym.imp.KERNEL32.dll_CreateFileA]
cmp eax, 0xffffffff
jne 0x508296
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.004f5c56
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x55ef40]
lea eax, [ecx + eax + 4]
and byte [eax], 0xfe
push dword [esi]
call fcn.004f1987
pop ecx
jmp 0x507e15
push 2
push ebx
push ebx
push dword [esi]
call fcn.005023de
add esp, 0x10
or eax, edx
je 0x50822e
push ebx
push ebx
push ebx
push dword [esi]
call fcn.005023de
and eax, edx
add esp, 0x10
cmp eax, 0xffffffff
je 0x507f0f
push 3
lea eax, [ebp - 0x18]
push eax
push dword [esi]
call fcn.004fd0b5
add esp, 0xc
cmp eax, 0xffffffff
je 0x507f0f
cmp eax, 2
je 0x5081d2
cmp eax, 3
jne 0x508220
cmp dword [ebp - 0x18], 0xbfbbef
jne 0x5081d2
mov byte [ebp - 2], 1
jmp 0x50802c
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x50802c
cmp eax, 2
jbe 0x50822e
cmp eax, 4
ja 0x508023
push 2
push ebx
push ebx
push dword [esi]
call fcn.005023de
add esp, 0x10
or eax, edx
je 0x50822e
push ebx
push ebx
push ebx
push dword [esi]
call fcn.005023de
add esp, 0x10
and eax, edx
cmp eax, 0xffffffff
jne 0x50802c
jmp 0x507f0f
mov eax, dword [ebp - 0x18]
and eax, 0xffff
cmp eax, 0xfffe
jne 0x5081fa
push dword [esi]
call fcn.004fbccb
pop ecx
call fcn.004f5c30
push 0x16
pop esi
mov dword [eax], esi
mov eax, esi
jmp 0x5082af
cmp eax, 0xfeff
jne 0x508220
push ebx
push 2
push dword [esi]
call fcn.004fc0ec
add esp, 0xc
cmp eax, 0xffffffff
je 0x507f0f
mov byte [ebp - 2], 2
jmp 0x50802c
push ebx
push ebx
push dword [esi]
call fcn.004fc0ec
add esp, 0xc
jmp 0x5081c4
movsx eax, byte [ebp - 2]
xor edi, edi
dec eax
je 0x50824e
dec eax
jne 0x50802c
mov dword [ebp - 0x18], 0xfeff
mov dword [ebp - 0x14], 2
jmp 0x50825c
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.00502302
add esp, 0xc
cmp eax, 0xffffffff
je 0x508282
add edi, eax
cmp dword [ebp - 0x14], edi
jg 0x50825c
jmp 0x50802c
push dword [esi]
call fcn.004fbccb
pop ecx
call fcn.004f5c30
mov eax, dword [eax]
mov dword [ebp - 0x20], eax
jmp 0x5082af
mov esi, dword [esi]
mov ecx, esi
sar ecx, 5
mov ecx, dword [ecx*4 + 0x55ef40]
and esi, 0x1f
imul esi, esi, 0x38
mov dword [esi + ecx], eax
mov eax, ebx
pop edi
pop esi
pop ebx
leave
ret