Leo at 07:40, 27 January 2014

2014-01-27T07:40:45Z

← Older revision		Revision as of 07:40, 27 January 2014
Line 3:		Line 3:
	Different issuers/banks will use different prefixes. For instance, Visa will use values 40-49 while MasterCard uses 50-59. A complete list can be found on [http://en.wikipedia.org/wiki/List_of_Issuer_Identification_Numbers Wikipedia].		Different issuers/banks will use different prefixes. For instance, Visa will use values 40-49 while MasterCard uses 50-59. A complete list can be found on [http://en.wikipedia.org/wiki/List_of_Issuer_Identification_Numbers Wikipedia].

			== Code ==
	<syntaxhighlight lang="python" line start="1" enclose="div">		<syntaxhighlight lang="python" line start="1" enclose="div">
	#!/usr/local/bin/python		#!/usr/local/bin/python
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	for i in range(0, len(values)):		for i in range(0, len(values)):
	values[i] = randint(0, 9)		values[i] = randint(0, 9)
	~~i = i + 1~~

	return values		return values

Leo: Created page with "I got bored one night and decided to create this as a quick exercise. This is a number generator that satisfies the luhn + MOD 10 algorithm that is used by credit card numbers..."

2014-01-27T07:39:07Z

Created page with "I got bored one night and decided to create this as a quick exercise. This is a number generator that satisfies the luhn + MOD 10 algorithm that is used by credit card numbers..."

New page

I got bored one night and decided to create this as a quick exercise. This is a number generator that satisfies the luhn + MOD 10 algorithm that is used by credit card numbers.

Different issuers/banks will use different prefixes. For instance, Visa will use values 40-49 while MasterCard uses 50-59. A complete list can be found on [http://en.wikipedia.org/wiki/List_of_Issuer_Identification_Numbers Wikipedia].

<syntaxhighlight lang="python" line start="1" enclose="div">
#!/usr/local/bin/python
import sys
from random import randint

def pad(prefix, values):
prefix = str(prefix)
i = 0

for c in prefix:
values[i] = int(c)
i = i + 1

return values

def randomize(values):
for i in range(0, len(values)):
values[i] = randint(0, 9)
i = i + 1

return values

def luhn_value(values):
sum = 0
i = 0

while i < len(values):
if i % 2 == 0:
value = values[i] * 2

# Since doubling a single value results in 2 <= i <= 18
# the sum of the digits is equivolant to subtracting 9
if value >= 10:
value = value - 9
else:
value = values[i]

sum = sum + value
i = i + 1

return (sum * 9) % 10

def generate(prefix = ""):
length = 15
values = [0]*length
prefix = str(prefix)

values = randomize(values)
values = pad(prefix, values)
check = luhn_value(values)

return "".join(str(n) for n in values) + str(check)

if len(sys.argv) == 2:
if sys.argv[1].isdigit():
print(generate(sys.argv[1]))
else:
print("Usage: cc.py [prefix]")
else:
print(generate())

</syntaxhighlight>

== Example ==
python cc.py 45
4539371684142703

python cc.py 55
5555576731917875

[[Category:Python]]

Credit Card Number Generator - Revision history

Leo at 07:40, 27 January 2014

Leo: Created page with "I got bored one night and decided to create this as a quick exercise. This is a number generator that satisfies the luhn + MOD 10 algorithm that is used by credit card numbers..."