Function at 0x643c9a
Capabilities:
Parse credit card information

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x28
mov eax, dword [0x78fc40]
push ebx
push esi
xor esi, esi
mov cl, byte [eax]
mov dword [ebp - 8], esi
mov dword [ebp - 4], esi
mov dword [ebp - 0x18], esi
mov dword [ebp - 0x14], esi
push edi
lea edi, [eax + 1]
mov dword [0x78fc40], edi
cmp cl, 0x41
jg 0x643e43
je 0x6442b6
test cl, cl
je 0x643e29
cmp cl, 0x2f
jle case.default.0x6441ac
cmp cl, 0x31
jle 0x643d51
cmp cl, 0x39
jg case.default.0x6441ac
movsx eax, byte [edi - 1]
lea eax, [eax*8 + 0x724af0]
push eax
lea ecx, [ebp - 8]
call fcn.00640baf
cmp dword [ebp - 8], 0
je 0x643d3e
lea eax, [ebp - 0x20]
mov dword [ebp - 0x20], str.operator
push eax
lea ecx, [ebp - 0x28]
mov dword [ebp - 0x1c], 8
call fcn.00640975
lea ecx, [ebp - 8]
push ecx
lea ecx, [ebp - 0x20]
push ecx
mov ecx, eax
call fcn.00640cd9
mov eax, dword [ebp - 0x20]
mov dword [ebp - 8], eax
mov eax, dword [ebp - 0x1c]
mov dword [ebp - 4], eax
mov eax, dword [ebp + 8]
mov ecx, dword [ebp - 8]
mov dword [eax], ecx
mov ecx, dword [ebp - 4]
mov dword [eax + 4], ecx
pop edi
pop esi
pop ebx
leave
ret
mov ebx, esi
mov dword [ebp - 0xc], esi
mov dword [ebp - 0x10], ebx
cmp byte [ebp + 0xc], bl
je 0x643dca
lea eax, [ebp - 0x20]
push eax
call fcn.00645085
push eax
lea eax, [ebp - 0x18]
push 0x3c
push eax
call fcn.00640c6a
add esp, 0x10
lea ecx, [ebp - 0x10]
push eax
call fcn.00640d97
lea ecx, [ebp - 0x10]
call fcn.00643a8d
cmp al, 0x3e
jne 0x643d95
push 0x20
lea ecx, [ebp - 0x10]
call fcn.00640dee
push 0x3e
lea ecx, [ebp - 0x10]
call fcn.00640dee
mov eax, dword [ebp + 0x10]
test eax, eax
je 0x643da9
mov byte [eax], 1
mov edi, dword [0x78fc40]
cmp byte [edi], bl
jne 0x643dc0
mov eax, dword [ebp + 8]
mov ecx, dword [ebp - 0x10]
mov dword [eax], ecx
mov ecx, dword [ebp - 0xc]
jmp 0x643d49
mov ebx, dword [ebp - 0x10]
inc edi
mov dword [0x78fc40], edi
push esi
lea eax, [ebp - 0x20]
push esi
push eax
call fcn.00645e89
add esp, 0xc
mov ecx, dword [eax]
mov eax, dword [eax + 4]
mov dword [ebp - 8], ecx
mov dword [ebp - 4], eax
mov dword [0x78fc40], edi
test ecx, ecx
je 0x643e10
cmp byte [edi - 1], 0x31
jne 0x643e10
lea eax, [ebp - 8]
push eax
lea eax, [ebp - 0x20]
push 0x7e
push eax
call fcn.00640c6a
add esp, 0xc
mov ecx, dword [eax]
mov eax, dword [eax + 4]
mov dword [ebp - 8], ecx
mov dword [ebp - 4], eax
test ebx, ebx
je 0x643d3e
lea eax, [ebp - 0x10]
push eax
lea ecx, [ebp - 8]
call fcn.00640d97
jmp 0x643d3e
lea eax, [edi - 1]
mov dword [0x78fc40], eax
mov ecx, dword [ebp + 8]
push 1
call fcn.006409e3
mov eax, dword [ebp + 8]
jmp 0x643d4c
cmp cl, 0x42
je 0x6442b3
jle case.default.0x6441ac
cmp cl, 0x5a
jle 0x6442b6
cmp cl, 0x5f
jne case.default.0x6441ac
movsx eax, byte [edi]
lea ecx, [edi + 1]
mov dword [0x78fc40], ecx
cmp eax, 0x4f
jg 0x643f86
cmp eax, 0x44
jge 0x644282
cmp eax, 0x39
jg 0x643f02
je 0x643ed5
test eax, eax
je 0x643eca
cmp eax, 0x2f
jle case.default.0x6441ac
cmp eax, 0x36
jle 0x643eba
cmp eax, 0x38
jg case.default.0x6441ac
movsx eax, byte [ecx - 1]
lea eax, [eax*8 + 0x724c10]
mov ecx, dword [ebp + 8]
push eax
call fcn.00640975
jmp 0x643e3b
movsx eax, byte [ecx - 1]
lea eax, [eax*8 + 0x724c10]
jmp 0x643cfa
mov dword [0x78fc40], edi
jmp 0x643e31
movsx eax, byte [ecx - 1]
lea ecx, [ebp - 0x18]
lea eax, [eax*8 + 0x724c10]
push eax
call fcn.00640975
mov edx, dword [ebp - 0x14]
or edx, 0x8000
mov eax, dword [ebp + 8]
mov ecx, dword [ebp - 0x18]
mov dword [eax], ecx
mov dword [eax + 4], edx
jmp 0x643d4c
cmp eax, 0x3f
je 0x643f33
cmp eax, 0x40
jle case.default.0x6441ac
cmp eax, 0x42
jle 0x644282
push 1
lea eax, [ebp - 0x18]
push esi
push eax
call fcn.00644f5b
mov edx, dword [ebp - 0x14]
add esp, 0xc
or edx, 0x1000
jmp 0x643ef2
mov dl, byte [ecx]
lea eax, [ecx + 1]
mov dword [0x78fc40], eax
test dl, dl
je 0x643f7b
mov edi, dword [ebp + 8]
cmp dl, 0x30
je 0x643f54
mov dword [edi + 4], esi
mov byte [edi + 4], 2
mov dword [edi], esi
jmp 0x643f74
push esi
lea eax, [ebp - 0x18]
push 1
push eax
call fcn.00644f5b
mov ecx, dword [ebp - 0x14]
add esp, 0xc
mov eax, dword [ebp - 0x18]
or ecx, 0x1000
mov dword [edi], eax
mov dword [edi + 4], ecx
mov eax, edi
jmp 0x643d4c
mov dword [0x78fc40], ecx
jmp 0x643e31
cmp eax, 0x54
jg 0x64416b
cmp eax, 0x53
jge 0x644282
sub eax, 0x50
je 0x64411b
sub eax, 1
je 0x643d03
sub eax, 1
jne case.default.0x6441ac
movsx eax, byte [ecx - 1]
lea ecx, [ebp - 8]
lea eax, [eax*8 + 0x724bd8]
push eax
call fcn.00640baf
mov eax, dword [0x78fc40]
mov al, byte [eax]
test al, al
jne 0x643fe4
push 1
push dword [ebp + 8]
lea ecx, [ebp - 8]
call fcn.00640d1d
jmp 0x643e3b
movsx eax, al
sub eax, 0x30
js case.default.0x6441ac
cmp eax, 5
jae case.default.0x6441ac
lea eax, [eax*8 + 0x724f18]
push eax
lea ecx, [ebp - 0x18]
call fcn.00640baf
mov eax, dword [0x78fc40]
mov cl, byte [eax]
inc eax
mov dword [0x78fc40], eax
cmp cl, 0x30
je 0x6440e1
cmp cl, 0x31
je 0x644035
jle 0x64402f
cmp cl, 0x34
jle 0x644157
dec eax
jmp 0x643e2c
mov eax, dword [ebp - 8]
lea ecx, [ebp - 0x10]
mov dword [ebp - 0x10], eax
mov eax, dword [ebp - 4]
mov dword [ebp - 0xc], eax
lea eax, [ebp - 0x18]
push eax
call fcn.00640d97
lea eax, [ebp - 0x20]
push eax
call fcn.00644d95
pop ecx
push 0x2c
lea ecx, [ebp - 0x18]
push ecx
mov ecx, eax
call fcn.00640cfb
push eax
lea ecx, [ebp - 0x10]
call fcn.00640d97
lea eax, [ebp - 0x20]
push eax
call fcn.00644d95
pop ecx
push 0x2c
lea ecx, [ebp - 0x18]
push ecx
mov ecx, eax
call fcn.00640cfb
push eax
lea ecx, [ebp - 0x10]
call fcn.00640d97
lea eax, [ebp - 0x20]
push eax
call fcn.00644d95
pop ecx
push 0x2c
lea ecx, [ebp - 0x18]
push ecx
mov ecx, eax
call fcn.00640cfb
push eax
lea ecx, [ebp - 0x10]
call fcn.00640d97
lea eax, [ebp - 0x20]
push esi
push eax
call fcn.0064309b
pop ecx
pop ecx
push 0x29
lea ecx, [ebp - 0x18]
push ecx
mov ecx, eax
call fcn.00640cfb
push eax
lea ecx, [ebp - 0x10]
call fcn.00640d97
push 0x27
push dword [ebp + 8]
lea ecx, [ebp - 0x10]
call fcn.00640cfb
jmp 0x643e3b
lea eax, [ebp - 0x20]
push esi
push eax
call fcn.00642d5a
mov eax, dword [ebp - 0x20]
pop ecx
pop ecx
mov dword [ebp - 0x10], eax
lea ecx, [ebp - 0x10]
mov eax, dword [ebp - 0x1c]
push 0x20
mov dword [ebp - 0xc], eax
call fcn.00640dee
lea eax, [ebp - 8]
push eax
lea eax, [ebp - 0x28]
push eax
lea ecx, [ebp - 0x10]
call fcn.00640cd9
lea ecx, [ebp - 0x18]
push ecx
mov ecx, eax
jmp 0x64415e
movsx eax, byte [ecx - 1]
lea ecx, [ebp - 8]
lea eax, [eax*8 + 0x724bd8]
push eax
call fcn.00640baf
push esi
lea eax, [ebp - 0x28]
push esi
push eax
call fcn.00643c9a
add esp, 0xc
mov ecx, dword [eax]
mov eax, dword [eax + 4]
mov dword [ebp - 0x18], ecx
mov dword [ebp - 0x14], eax
test ecx, ecx
je 0x644157
test eax, 0x400
jne case.default.0x6441ac
lea eax, [ebp - 0x18]
push eax
lea ecx, [ebp - 8]
push dword [ebp + 8]
call fcn.00640cd9
jmp 0x643e3b
cmp eax, 0x56
jle 0x644292
cmp eax, 0x57
jle case.default.0x6441ac
cmp eax, 0x59
jle 0x644282
cmp eax, 0x5f
jne case.default.0x6441ac
movsx eax, byte [ecx]
inc ecx
sub eax, 0x41
mov dword [0x78fc40], ecx
cmp eax, 0xc
ja case.default.0x6441ac
movzx eax, byte [eax + 0x6442f6]
jmp dword [eax*4 + 0x6442ea]
movsx eax, byte [ecx - 1]
lea eax, [eax*8 + 0x724ca0]
jmp 0x643eaf
movsx eax, byte [ecx - 1]
lea ecx, [ebp - 0x18]
lea eax, [eax*8 + 0x724ca0]
push eax
call fcn.00640975
mov eax, dword [0x78fc40]
cmp byte [eax], 0x3f
lea eax, [ebp - 0x28]
push eax
jne 0x644206
call fcn.00642e31
pop ecx
push eax
lea ecx, [ebp - 0x18]
call fcn.00640d97
mov eax, dword [0x78fc40]
cmp byte [eax], 0x40
jne 0x644215
inc eax
mov dword [0x78fc40], eax
jmp 0x644215
call fcn.0064503d
pop ecx
push eax
lea ecx, [ebp - 0x18]
call fcn.00640d97
lea eax, [ebp - 0x20]
mov dword [ebp - 0x20], 0x7255cc
push eax
lea ecx, [ebp - 0x18]
mov dword [ebp - 0x1c], 2
call fcn.00640d3f
mov eax, dword [ebp + 8]
mov ecx, dword [ebp - 0x18]
mov dword [eax], ecx
mov ecx, dword [ebp - 0x14]
jmp 0x643d49
movsx eax, byte [ecx - 1]
lea ecx, [ebp - 0x18]
lea eax, [eax*8 + 0x724ca0]
push eax
call fcn.00640975
jmp 0x644269
cmp al, 0x40
je 0x644279
inc ecx
mov dword [0x78fc40], ecx
lea ecx, [ebp - 0x18]
push eax
call fcn.00640dee
mov ecx, dword [0x78fc40]
mov al, byte [ecx]
test al, al
jne 0x644255
cmp al, 0x40
jne 0x64422f
inc ecx
mov dword [0x78fc40], ecx
jmp 0x64422f
movsx eax, byte [ecx - 1]
lea eax, [eax*8 + 0x724bd8]
jmp 0x643eaf
movsx eax, byte [ecx - 1]
lea eax, [eax*8 + 0x724bd8]
jmp 0x643cfa
mov eax, dword [ebp + 8]
mov dword [eax + 4], esi
mov byte [eax + 4], 2
mov dword [eax], esi
jmp 0x643d4c
xor esi, esi
inc esi
movsx eax, byte [edi - 1]
lea ecx, [ebp - 8]
lea eax, [eax*8 + 0x724ab8]
push eax
call fcn.00640baf
test esi, esi
je 0x643d03
cmp dword [ebp - 8], 0
je 0x643d3e
or dword [ebp - 4], 0x200
jmp 0x643d3e