de.hybris.platform.couponservices.couponcodegeneration.impl

Class DefaultCouponCodeCipherTextGenerationStrategy

java.lang.Object

de.hybris.platform.couponservices.couponcodegeneration.impl.AbstractCouponCodeGenerationStrategy

de.hybris.platform.couponservices.couponcodegeneration.impl.DefaultCouponCodeCipherTextGenerationStrategy

All Implemented Interfaces:

CouponCodeCipherTextGenerationStrategy

public class DefaultCouponCodeCipherTextGenerationStrategy
extends AbstractCouponCodeGenerationStrategy
implements CouponCodeCipherTextGenerationStrategy

Constructor Summary

Constructors

Constructor and Description
DefaultCouponCodeCipherTextGenerationStrategy()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet()
protected void	checkLength(int length) checks that the given length is supported (2,4,6,8,12,16,20,24,28,32).
protected void	checkLength(String clearText) checks that the given clearText is of allowed length (such that clearText.getBytes().length <= 16))
protected String	constructCipherText(MultiCodeCouponModel coupon, int[] cipherTextInput) constructs the ciphertext based on the given input byte array.
protected byte[]	decodeSignature(MultiCodeCouponModel coupon) decodes the coupon.signature via Base64.decode(String).
protected byte[]	encrypt(MultiCodeCouponModel coupon, String clearText) encrypts the given cleartext using the signature defined on the coupon.
String	generateCipherText(MultiCodeCouponModel coupon, String clearText, int length) returns the generated cipher-text part of the coupon code for the given clearText with the given length
protected Cipher	getCipher(MultiCodeCouponModel coupon)
protected ConfigurationService	getConfigurationService()
protected Map<Integer,Integer>	getLengthToIntMapping()
void	setConfigurationService(ConfigurationService configurationService)
void	setLengthToIntMapping(Map<Integer,Integer> lengthToIntMapping) This mapping defines how many input int values are needed for a given length of cipher-text.
protected int[]	transform(byte[] encryptedData, int length) transforms the given input of 16-byte array into an array of ints of specified length.

Methods inherited from class de.hybris.platform.couponservices.couponcodegeneration.impl.AbstractCouponCodeGenerationStrategy

createIntFromTwoCharactersString, createTwoCharactersFromByte, pickCharacter, pickInt

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultCouponCodeCipherTextGenerationStrategy

public DefaultCouponCodeCipherTextGenerationStrategy()

Method Detail

afterPropertiesSet

public void afterPropertiesSet()

generateCipherText

public String generateCipherText(MultiCodeCouponModel coupon,
                                 String clearText,
                                 int length)

Description copied from interface: CouponCodeCipherTextGenerationStrategy

returns the generated cipher-text part of the coupon code for the given clearText with the given length

Specified by:

generateCipherText in interface CouponCodeCipherTextGenerationStrategy

encrypt

protected byte[] encrypt(MultiCodeCouponModel coupon,
                         String clearText)

encrypts the given cleartext using the signature defined on the coupon.

constructCipherText

protected final String constructCipherText(MultiCodeCouponModel coupon,
                                           int[] cipherTextInput)

constructs the ciphertext based on the given input byte array.

transform

protected int[] transform(byte[] encryptedData,
                          int length)

transforms the given input of 16-byte array into an array of ints of specified length. Each of the resulting ints is composed of three (unsigned) bytes (using the lower 24 bits of the int).

getCipher

protected Cipher getCipher(MultiCodeCouponModel coupon)
                    throws NoSuchAlgorithmException

Throws:

NoSuchAlgorithmException

decodeSignature

protected byte[] decodeSignature(MultiCodeCouponModel coupon)

decodes the coupon.signature via Base64.decode(String).

checkLength

protected void checkLength(int length)

checks that the given length is supported (2,4,6,8,12,16,20,24,28,32).

checkLength

protected void checkLength(String clearText)

checks that the given clearText is of allowed length (such that clearText.getBytes().length <= 16))

getConfigurationService

protected ConfigurationService getConfigurationService()

setConfigurationService

public void setConfigurationService(ConfigurationService configurationService)

getLengthToIntMapping

protected Map<Integer,Integer> getLengthToIntMapping()

setLengthToIntMapping

public void setLengthToIntMapping(Map<Integer,Integer> lengthToIntMapping)

This mapping defines how many input int values are needed for a given length of cipher-text. For each 2 characters of ciphertext one input int is needed. Only the lower three bytes of an int are used. Therefore, the default mapping is:

 4  characters -> 2 bytes  -> 1 int
 6  characters -> 3 bytes  -> 1 int
 8  characters -> 4 bytes  -> 2 ints
 12 characters -> 6 bytes  -> 2 ints
 16 characters -> 8 bytes  -> 3 ints
 20 characters -> 10 bytes -> 4 ints
 28 characters -> 14 bytes -> 5 ints
 32 characters -> 16 bytes -> 6 ints