Function at 0x491615
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 0x491644
mov dword [ebp - 0x2c], ebx
mov byte [ebp - 1], 0x10
jmp 0x49164e
mov dword [ebp - 0x2c], 1
mov byte [ebp - 1], bl
lea eax, [ebp - 0x24]
push eax
call fcn.0049530e
test eax, eax
pop ecx
je 0x491669
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.00486202
add esp, 0x14
lea eax, [ebp - 0x28]
push eax
call fcn.0047f8bc
test eax, eax
pop ecx
je 0x491684
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.00486202
add esp, 0x14
mov ecx, dword [ebp + 0x10]
mov eax, 0x8000
test eax, ecx
jne 0x4916a1
test ecx, 0x74000
jne 0x49169d
cmp dword [ebp - 0x24], eax
je 0x4916a1
or byte [ebp - 1], 0x80
mov eax, ecx
and eax, 3
sub eax, ebx
mov edx, 0xc0000000
mov edi, SysReAllocString
je 0x4916fb
dec eax
je 0x4916e5
dec eax
je 0x4916e0
call fcn.00482819
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.00482806
push 0x16
pop esi
push ebx
push ebx
push ebx
push ebx
push ebx
mov dword [eax], esi
call fcn.004862fe
add esp, 0x14
jmp 0x491cad
mov dword [ebp - 8], edx
jmp 0x4916fe
test cl, 8
je 0x4916f2
test ecx, 0x70000
jne 0x4916e0
mov dword [ebp - 8], 0x40000000
jmp 0x4916fe
mov dword [ebp - 8], edi
mov eax, dword [ebp + 0x14]
push 0x10
pop ecx
sub eax, ecx
je 0x49173f
sub eax, ecx
je 0x491736
sub eax, ecx
je 0x49172d
sub eax, ecx
je 0x491724
sub eax, 0x40
jne 0x4916ba
cmp dword [ebp - 8], edi
sete al
mov dword [ebp - 0x10], eax
jmp 0x491742
mov dword [ebp - 0x10], 3
jmp 0x491742
mov dword [ebp - 0x10], 2
jmp 0x491742
mov dword [ebp - 0x10], 1
jmp 0x491742
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 0x491795
je 0x49178c
cmp eax, ebx
je 0x49178c
cmp eax, edi
je 0x491783
cmp eax, 0x200
je 0x491808
cmp eax, 0x300
jne 0x4916ba
mov dword [ebp - 0x14], 2
jmp 0x4917b2
mov dword [ebp - 0x14], 4
jmp 0x4917b2
mov dword [ebp - 0x14], 3
jmp 0x4917b2
cmp eax, 0x500
je 0x4917ab
cmp eax, 0x600
je 0x491808
cmp eax, edx
jne 0x4916ba
mov dword [ebp - 0x14], 1
mov eax, dword [ebp + 0x10]
test edi, eax
mov dword [ebp - 0xc], 0x80
je 0x4917d6
mov ecx, dword [0x4f5178]
not ecx
and ecx, dword [ebp + 0x18]
test cl, cl
js 0x4917d6
mov dword [ebp - 0xc], 1
test al, 0x40
je 0x4917f2
or dword [ebp - 0xc], 0x4000000
or dword [ebp - 8], 0x10000
cmp dword [ebp - 0x28], 2
jne 0x4917f2
or dword [ebp - 0x10], 4
test ax, 0x1000
je 0x4917fb
or dword [ebp - 0xc], edi
test al, 0x20
je 0x491811
or dword [ebp - 0xc], 0x8000000
jmp 0x49181c
mov dword [ebp - 0x14], 5
jmp 0x4917b2
test al, 0x10
je 0x49181c
or dword [ebp - 0xc], 0x10000000
call fcn.004912d3
cmp eax, 0xffffffff
mov dword [esi], eax
jne 0x491842
call fcn.00482819
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.00482806
mov dword [eax], 0x18
jmp 0x4918d0
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 0x4918dc
mov ecx, dword [ebp - 8]
mov eax, 0xc0000000
and ecx, eax
cmp ecx, eax
jne 0x4918a8
test byte [ebp + 0x10], 1
je 0x4918a8
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 0x4918dc
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x538a80]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.0048282c
pop ecx
call fcn.00482806
mov eax, dword [eax]
jmp 0x491d69
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_GetFileType]
cmp eax, ebx
jne 0x49192d
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x538a80]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov esi, eax
push esi
call fcn.0048282c
pop ecx
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp esi, ebx
jne 0x4918d0
call fcn.00482806
mov dword [eax], 0xd
jmp 0x4918d0
cmp eax, 2
jne 0x491938
or byte [ebp - 1], 0x40
jmp 0x491941
cmp eax, 3
jne 0x491941
or byte [ebp - 1], 8
push dword [ebp - 0x1c]
push dword [esi]
call fcn.004910a2
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x538a80]
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 + 0x538a80]
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 0x491a16
test cl, 0x80
je 0x491ae6
test byte [ebp + 0x10], 2
je 0x491a16
push 2
or edi, 0xffffffff
push edi
push dword [esi]
call fcn.0048c44a
add esp, 0xc
cmp eax, edi
mov dword [ebp - 0x18], eax
jne 0x4919d5
call fcn.00482819
cmp dword [eax], 0x83
je 0x491a16
push dword [esi]
call fcn.0048ba67
jmp 0x4918cf
push 1
lea eax, [ebp - 4]
push eax
push dword [esi]
mov byte [ebp - 4], bl
call fcn.00494b94
add esp, 0xc
test eax, eax
jne 0x491a06
cmp byte [ebp - 4], 0x1a
jne 0x491a06
mov eax, dword [ebp - 0x18]
cdq
push edx
push eax
push dword [esi]
call fcn.004949e0
add esp, 0xc
cmp eax, edi
je 0x4919c9
push ebx
push ebx
push dword [esi]
call fcn.0048c44a
add esp, 0xc
cmp eax, edi
je 0x4919c9
test byte [ebp - 1], 0x80
je 0x491ae6
mov ecx, 0x74000
test dword [ebp + 0x10], ecx
mov edi, 0x4000
jne 0x491a3e
mov eax, dword [ebp - 0x24]
and eax, ecx
jne 0x491a3b
or dword [ebp + 0x10], edi
jmp 0x491a3e
or dword [ebp + 0x10], eax
mov eax, dword [ebp + 0x10]
and eax, ecx
cmp eax, edi
je 0x491a8b
cmp eax, 0x10000
je 0x491a77
cmp eax, 0x14000
je 0x491a77
cmp eax, 0x20000
je 0x491a85
cmp eax, 0x24000
je 0x491a85
cmp eax, 0x40000
je 0x491a71
cmp eax, 0x44000
jne 0x491a8e
mov byte [ebp - 2], 1
jmp 0x491a8e
mov ecx, dword [ebp + 0x10]
mov eax, 0x301
and ecx, eax
cmp ecx, eax
jne 0x491a8e
mov byte [ebp - 2], 2
jmp 0x491a8e
mov byte [ebp - 2], bl
test dword [ebp + 0x10], 0x70000
je 0x491ae6
test byte [ebp - 1], 0x40
mov dword [ebp - 0x18], ebx
jne 0x491ae6
mov eax, dword [ebp - 8]
mov ecx, 0xc0000000
and eax, ecx
cmp eax, 0x40000000
je 0x491c40
cmp eax, 0x80000000
je 0x491c07
cmp eax, ecx
jne 0x491ae6
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x491ae6
cmp eax, 2
jbe 0x491ce8
cmp eax, 4
jbe 0x491bd9
cmp eax, 5
je 0x491ce8
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x538a80]
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 + 0x538a80]
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 0x491b58
test byte [ebp + 0x10], 8
je 0x491b58
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x538a80]
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 0x491d67
test byte [ebp + 0x10], 1
je 0x491d67
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 0x491d50
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.0048282c
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x538a80]
lea eax, [ecx + eax + 4]
and byte [eax], 0xfe
push dword [esi]
call fcn.0049111f
pop ecx
jmp 0x4918cf
push 2
push ebx
push ebx
push dword [esi]
call fcn.00490440
add esp, 0x10
or eax, edx
je 0x491ce8
push ebx
push ebx
push ebx
push dword [esi]
call fcn.00490440
and eax, edx
add esp, 0x10
cmp eax, 0xffffffff
je 0x4919c9
push 3
lea eax, [ebp - 0x18]
push eax
push dword [esi]
call fcn.00494b94
add esp, 0xc
cmp eax, 0xffffffff
je 0x4919c9
cmp eax, 2
je 0x491c8c
cmp eax, 3
jne 0x491cda
cmp dword [ebp - 0x18], 0xbfbbef
jne 0x491c8c
mov byte [ebp - 2], 1
jmp 0x491ae6
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x491ae6
cmp eax, 2
jbe 0x491ce8
cmp eax, 4
ja 0x491add
push 2
push ebx
push ebx
push dword [esi]
call fcn.00490440
add esp, 0x10
or eax, edx
je 0x491ce8
push ebx
push ebx
push ebx
push dword [esi]
call fcn.00490440
add esp, 0x10
and eax, edx
cmp eax, 0xffffffff
jne 0x491ae6
jmp 0x4919c9
mov eax, dword [ebp - 0x18]
and eax, 0xffff
cmp eax, 0xfffe
jne 0x491cb4
push dword [esi]
call fcn.0048ba67
pop ecx
call fcn.00482806
push 0x16
pop esi
mov dword [eax], esi
mov eax, esi
jmp 0x491d69
cmp eax, 0xfeff
jne 0x491cda
push ebx
push 2
push dword [esi]
call fcn.0048c44a
add esp, 0xc
cmp eax, 0xffffffff
je 0x4919c9
mov byte [ebp - 2], 2
jmp 0x491ae6
push ebx
push ebx
push dword [esi]
call fcn.0048c44a
add esp, 0xc
jmp 0x491c7e
movsx eax, byte [ebp - 2]
xor edi, edi
dec eax
je 0x491d08
dec eax
jne 0x491ae6
mov dword [ebp - 0x18], 0xfeff
mov dword [ebp - 0x14], 2
jmp 0x491d16
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.0048c36e
add esp, 0xc
cmp eax, 0xffffffff
je 0x491d3c
add edi, eax
cmp dword [ebp - 0x14], edi
jg 0x491d16
jmp 0x491ae6
push dword [esi]
call fcn.0048ba67
pop ecx
call fcn.00482806
mov eax, dword [eax]
mov dword [ebp - 0x20], eax
jmp 0x491d69
mov esi, dword [esi]
mov ecx, esi
sar ecx, 5
mov ecx, dword [ecx*4 + 0x538a80]
and esi, 0x1f
imul esi, esi, 0x38
mov dword [esi + ecx], eax
mov eax, ebx
pop edi
pop esi
pop ebx
leave
ret