From a7c197b9a35170225f83aa41b1b21d8d4fb1a9f6 Mon Sep 17 00:00:00 2001 From: James FitzGibbon Date: Thu, 24 Oct 1996 08:23:45 +0000 Subject: perl5 module to validate/generate credit card checksums/names. --- misc/p5-Business-CreditCard/pkg-descr | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 misc/p5-Business-CreditCard/pkg-descr (limited to 'misc/p5-Business-CreditCard/pkg-descr') diff --git a/misc/p5-Business-CreditCard/pkg-descr b/misc/p5-Business-CreditCard/pkg-descr new file mode 100644 index 000000000000..dfcea144d3d0 --- /dev/null +++ b/misc/p5-Business-CreditCard/pkg-descr @@ -0,0 +1,32 @@ + These subroutines tell you whether a credit card number is + self-consistent -- whether the last digit of the number is + a valid checksum for the preceding digits. + + The validate() subroutine returns 1 if the card number + provided passes the checksum test, and 0 otherwise. + + The cardtype() subroutine returns a string containing the + type of card: "MasterCard", "VISA", and so on. My list is + not complete; I welcome additions. + + The generate_last_digit() subroutine computes and returns + the last digit of the card given the preceding digits. + With a 16-digit card, you provide the first 15 digits; the + subroutine returns the sixteenth. + + This module does not tell you whether the number is on an + actual card, only whether it might conceivably be on a + real card. To verify whether a card is real, or whether + it's been stolen, or what its balance is, you need a + Merchant ID, which gives you access to credit card + databases. The Perl Journal + (http://work.media.mit.edu/tpj) has a Merchant ID so that + I can accept MasterCard and VISA payments; it comes with + the little pushbutton/slide-your-card-through device + you've seen in restaurants and stores. That device + calculates the checksum for you, so I don't actually use + this module. + + These subroutines will also work if you provide the + arguments as numbers instead of strings, e.g. + validate(5276440065421319). -- cgit v1.2.3