helper

Documentation

Overview

A credit card number is composed by a six-digit Issuer Identification Number (IIN), a variable length (7-12) individual account identifier and a single check digit.

Index

• Constants
• func SetAlphabet(dstMap map[rune]uint16, dstSlice []rune, alphabet string) error
• type FpeCreditCard
  • func NewFPECreditCardProcessor(m cipher.BlockMode) FpeCreditCard
• type FpeString
  • func NewFpeStringProcessor(m cipher.BlockMode, alphabet string) FpeString

Constants

const (
	// The radix to cipher Credit Cards (i.e. decimal numbers) is 10
	CCRadix = 10
)

Functions

func SetAlphabet

func SetAlphabet(dstMap map[rune]uint16, dstSlice []rune, alphabet string) error

Types

type FpeCreditCard

type FpeCreditCard interface {
	// Crypt encrypts or decrypts a credit card number.
	Crypt(src string) (string, error)
}

func NewFPECreditCardProcessor

func NewFPECreditCardProcessor(m cipher.BlockMode) FpeCreditCard

type FpeString

type FpeString interface {
	// Crypt encrypts or decrypts a string.
	Crypt(in string) (string, error)
	SetTweak(tweak []byte)
}

func NewFpeStringProcessor

func NewFpeStringProcessor(m cipher.BlockMode, alphabet string) FpeString