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- #!/usr/bin/python
- """
- gencc: A simple program to generate credit card numbers that pass the MOD 10 check
- (Luhn formula).
- Usefull for testing e-commerce sites during development.
- Copyright 2003 Graham King
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- """
- from random import Random
- import sys
- import copy
- visaPrefixList = [ ['4', '5', '3', '9'],
- ['4', '5', '5', '6'],
- ['4', '9', '1', '6'],
- ['4', '5', '3', '2'],
- ['4', '9', '2', '9'],
- ['4', '0', '2', '4', '0', '0', '7', '1'],
- ['4', '4', '8', '6'],
- ['4', '7', '1', '6'],
- ['4'] ]
- mastercardPrefixList = [ ['5', '1'],
- ['5', '2'],
- ['5', '3'],
- ['5', '4'],
- ['5', '5'] ]
- amexPrefixList = [ ['3', '4'],
- ['3', '7'] ]
- discoverPrefixList = [ ['6', '0', '1', '1'] ]
- """
- 'prefix' is the start of the CC number as a string, any number of digits.
- 'length' is the length of the CC number to generate. Typically 13 or 16
- """
- def completed_number(prefix, length):
- ccnumber = prefix
- # generate digits
- while len(ccnumber) < (length - 1):
- digit = generator.choice(['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'])
- ccnumber.append(digit)
- # Calculate sum
- sum = 0
- pos = 0
- reversedCCnumber = []
- reversedCCnumber.extend(ccnumber)
- reversedCCnumber.reverse()
- while pos < length - 1:
- odd = int( reversedCCnumber[pos] ) * 2
- if odd > 9:
- odd -= 9
- sum += odd
- if pos != (length - 2):
- sum += int( reversedCCnumber[pos+1] )
- pos += 2
- # Calculate check digit
- checkdigit = ((sum / 10 + 1) * 10 - sum) % 10
- ccnumber.append( str(checkdigit) )
- return ''.join(ccnumber)
- def credit_card_number(generator, prefixList, length, howMany):
- result = []
- for i in range(howMany):
- ccnumber = copy.copy( generator.choice(prefixList) )
- result.append( completed_number(ccnumber, length) )
- return result
- def output(title, numbers):
- result = []
- result.append(title)
- result.append( '-' * len(title) )
- result.append( '\n'.join(numbers) )
- result.append( '' )
- return '\n'.join(result)
- #
- # Main
- #
- generator = Random()
- generator.seed() # Seed from current time
- ## Generated CC nos
- mastercard = credit_card_number(generator, mastercardPrefixList, 16, 10)
- print output("Mastercard", mastercard)
- visa16 = credit_card_number(generator, visaPrefixList, 16, 10)
- print output("VISA 16 digit", visa16)
- visa13 = credit_card_number(generator, visaPrefixList, 13, 5)
- print output("VISA 13 digit", visa13)
- amex = credit_card_number(generator, amexPrefixList, 15, 5)
- print output("American Express", amex)
- discover = credit_card_number(generator, discoverPrefixList, 16, 3)
- print output("Discover", discover)
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