Function at 0x642a45
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 0x642a74
mov dword [ebp - 0x30], ebx
mov byte [ebp - 1], 0x10
jmp 0x642a7e
mov dword [ebp - 0x30], 1
mov byte [ebp - 1], bl
lea eax, [ebp - 0x24]
push eax
call fcn.006436ce
test eax, eax
pop ecx
je 0x642a99
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.0062480b
add esp, 0x14
lea eax, [ebp - 0x28]
push eax
call fcn.006292e8
test eax, eax
pop ecx
je 0x642ab4
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.0062480b
add esp, 0x14
mov ecx, dword [ebp + 0x10]
mov eax, 0x8000
test eax, ecx
jne 0x642ad1
test ecx, 0x74000
jne 0x642acd
cmp dword [ebp - 0x24], eax
je 0x642ad1
or byte [ebp - 1], 0x80
mov eax, ecx
and eax, 3
sub eax, ebx
mov edx, 0xc0000000
mov edi, connect
je 0x642b2b
dec eax
je 0x642b15
dec eax
je 0x642b10
call fcn.00629a16
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.00629a03
push 0x16
pop esi
push ebx
push ebx
push ebx
push ebx
push ebx
mov dword [eax], esi
call fcn.00624907
add esp, 0x14
jmp 0x6430de
mov dword [ebp - 8], edx
jmp 0x642b2e
test cl, 8
je 0x642b22
test ecx, 0x70000
jne 0x642b10
mov dword [ebp - 8], 0x40000000
jmp 0x642b2e
mov dword [ebp - 8], edi
mov eax, dword [ebp + 0x14]
push 0x10
pop ecx
sub eax, ecx
je 0x642b6f
sub eax, ecx
je 0x642b66
sub eax, ecx
je 0x642b5d
sub eax, ecx
je 0x642b54
sub eax, 0x40
jne 0x642aea
cmp dword [ebp - 8], edi
sete al
mov dword [ebp - 0x10], eax
jmp 0x642b72
mov dword [ebp - 0x10], 3
jmp 0x642b72
mov dword [ebp - 0x10], 2
jmp 0x642b72
mov dword [ebp - 0x10], 1
jmp 0x642b72
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 0x642bc5
je 0x642bbc
cmp eax, ebx
je 0x642bbc
cmp eax, edi
je 0x642bb3
cmp eax, 0x200
je 0x642c38
cmp eax, 0x300
jne 0x642aea
mov dword [ebp - 0x14], 2
jmp 0x642be2
mov dword [ebp - 0x14], 4
jmp 0x642be2
mov dword [ebp - 0x14], 3
jmp 0x642be2
cmp eax, 0x500
je 0x642bdb
cmp eax, 0x600
je 0x642c38
cmp eax, edx
jne 0x642aea
mov dword [ebp - 0x14], 1
mov eax, dword [ebp + 0x10]
test edi, eax
mov dword [ebp - 0xc], 0x80
je 0x642c06
mov ecx, dword [0x6b7900]
not ecx
and ecx, dword [ebp + 0x18]
test cl, cl
js 0x642c06
mov dword [ebp - 0xc], 1
test al, 0x40
je 0x642c22
or dword [ebp - 0xc], 0x4000000
or dword [ebp - 8], 0x10000
cmp dword [ebp - 0x28], 2
jne 0x642c22
or dword [ebp - 0x10], 4
test ax, 0x1000
je 0x642c2b
or dword [ebp - 0xc], edi
test al, 0x20
je 0x642c41
or dword [ebp - 0xc], 0x8000000
jmp 0x642c4c
mov dword [ebp - 0x14], 5
jmp 0x642be2
test al, 0x10
je 0x642c4c
or dword [ebp - 0xc], 0x10000000
call fcn.00640f81
cmp eax, 0xffffffff
mov dword [esi], eax
jne 0x642c72
call fcn.00629a16
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.00629a03
mov dword [eax], 0x18
jmp 0x642d00
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 0x642d0c
mov ecx, dword [ebp - 8]
mov eax, 0xc0000000
and ecx, eax
cmp ecx, eax
jne 0x642cd8
test byte [ebp + 0x10], 1
je 0x642cd8
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 0x642d0c
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x6f4900]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.00629a29
pop ecx
call fcn.00629a03
mov eax, dword [eax]
jmp 0x64319a
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_GetFileType]
cmp eax, ebx
jne 0x642d5d
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x6f4900]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov esi, eax
push esi
call fcn.00629a29
pop ecx
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp esi, ebx
jne 0x642d00
call fcn.00629a03
mov dword [eax], 0xd
jmp 0x642d00
cmp eax, 2
jne 0x642d68
or byte [ebp - 1], 0x40
jmp 0x642d71
cmp eax, 3
jne 0x642d71
or byte [ebp - 1], 8
push dword [ebp - 0x1c]
push dword [esi]
call fcn.00640d50
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x6f4900]
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 + 0x6f4900]
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 0x642e47
test cl, 0x80
je 0x642f17
test byte [ebp + 0x10], 2
je 0x642e47
push 2
or edi, 0xffffffff
push edi
push dword [esi]
call fcn.0063719a
add esp, 0xc
cmp eax, edi
mov dword [ebp - 0x18], eax
jne 0x642e05
call fcn.00629a16
cmp dword [eax], 0x83
je 0x642e47
push dword [esi]
call fcn.00635cdc
jmp 0x642cff
push 1
lea eax, [ebp - 0x2c]
push eax
push dword [esi]
mov dword [ebp - 0x2c], ebx
call fcn.006372e8
add esp, 0xc
test eax, eax
jne 0x642e37
cmp word [ebp - 0x2c], 0x1a
jne 0x642e37
mov eax, dword [ebp - 0x18]
cdq
push edx
push eax
push dword [esi]
call fcn.0064345e
add esp, 0xc
cmp eax, edi
je 0x642df9
push ebx
push ebx
push dword [esi]
call fcn.0063719a
add esp, 0xc
cmp eax, edi
je 0x642df9
test byte [ebp - 1], 0x80
je 0x642f17
mov ecx, 0x74000
test dword [ebp + 0x10], ecx
mov edi, 0x4000
jne 0x642e6f
mov eax, dword [ebp - 0x24]
and eax, ecx
jne 0x642e6c
or dword [ebp + 0x10], edi
jmp 0x642e6f
or dword [ebp + 0x10], eax
mov eax, dword [ebp + 0x10]
and eax, ecx
cmp eax, edi
je 0x642ebc
cmp eax, 0x10000
je 0x642ea8
cmp eax, 0x14000
je 0x642ea8
cmp eax, 0x20000
je 0x642eb6
cmp eax, 0x24000
je 0x642eb6
cmp eax, 0x40000
je 0x642ea2
cmp eax, 0x44000
jne 0x642ebf
mov byte [ebp - 2], 1
jmp 0x642ebf
mov ecx, dword [ebp + 0x10]
mov eax, 0x301
and ecx, eax
cmp ecx, eax
jne 0x642ebf
mov byte [ebp - 2], 2
jmp 0x642ebf
mov byte [ebp - 2], bl
test dword [ebp + 0x10], 0x70000
je 0x642f17
test byte [ebp - 1], 0x40
mov dword [ebp - 0x18], ebx
jne 0x642f17
mov eax, dword [ebp - 8]
mov ecx, 0xc0000000
and eax, ecx
cmp eax, 0x40000000
je 0x643071
cmp eax, 0x80000000
je 0x643038
cmp eax, ecx
jne 0x642f17
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x642f17
cmp eax, 2
jbe 0x643119
cmp eax, 4
jbe 0x64300a
cmp eax, 5
je 0x643119
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x6f4900]
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 + 0x6f4900]
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 0x642f89
test byte [ebp + 0x10], 8
je 0x642f89
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x6f4900]
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 0x643198
test byte [ebp + 0x10], 1
je 0x643198
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 0x643181
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.00629a29
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x6f4900]
lea eax, [ecx + eax + 4]
and byte [eax], 0xfe
push dword [esi]
call fcn.00640dcd
pop ecx
jmp 0x642cff
push 2
push ebx
push ebx
push dword [esi]
call fcn.00641d10
add esp, 0x10
or eax, edx
je 0x643119
push ebx
push ebx
push ebx
push dword [esi]
call fcn.00641d10
and eax, edx
add esp, 0x10
cmp eax, 0xffffffff
je 0x642df9
push 3
lea eax, [ebp - 0x18]
push eax
push dword [esi]
call fcn.006372e8
add esp, 0xc
cmp eax, 0xffffffff
je 0x642df9
cmp eax, 2
je 0x6430bd
cmp eax, 3
jne 0x64310b
cmp dword [ebp - 0x18], 0xbfbbef
jne 0x6430bd
mov byte [ebp - 2], 1
jmp 0x642f17
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x642f17
cmp eax, 2
jbe 0x643119
cmp eax, 4
ja 0x642f0e
push 2
push ebx
push ebx
push dword [esi]
call fcn.00641d10
add esp, 0x10
or eax, edx
je 0x643119
push ebx
push ebx
push ebx
push dword [esi]
call fcn.00641d10
add esp, 0x10
and eax, edx
cmp eax, 0xffffffff
jne 0x642f17
jmp 0x642df9
mov eax, dword [ebp - 0x18]
and eax, 0xffff
cmp eax, 0xfffe
jne 0x6430e5
push dword [esi]
call fcn.00635cdc
pop ecx
call fcn.00629a03
push 0x16
pop esi
mov dword [eax], esi
mov eax, esi
jmp 0x64319a
cmp eax, 0xfeff
jne 0x64310b
push ebx
push 2
push dword [esi]
call fcn.0063719a
add esp, 0xc
cmp eax, 0xffffffff
je 0x642df9
mov byte [ebp - 2], 2
jmp 0x642f17
push ebx
push ebx
push dword [esi]
call fcn.0063719a
add esp, 0xc
jmp 0x6430af
movsx eax, byte [ebp - 2]
xor edi, edi
dec eax
je 0x643139
dec eax
jne 0x642f17
mov dword [ebp - 0x18], 0xfeff
mov dword [ebp - 0x14], 2
jmp 0x643147
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.00639765
add esp, 0xc
cmp eax, 0xffffffff
je 0x64316d
add edi, eax
cmp dword [ebp - 0x14], edi
jg 0x643147
jmp 0x642f17
push dword [esi]
call fcn.00635cdc
pop ecx
call fcn.00629a03
mov eax, dword [eax]
mov dword [ebp - 0x20], eax
jmp 0x64319a
mov esi, dword [esi]
mov ecx, esi
sar ecx, 5
mov ecx, dword [ecx*4 + 0x6f4900]
and esi, 0x1f
imul esi, esi, 0x38
mov dword [esi + ecx], eax
mov eax, ebx
pop edi
pop esi
pop ebx
leave
ret