org.intellimate.izou.security

Class SecurityFunctions

java.lang.Object

org.intellimate.izou.security.SecurityFunctions

public final class SecurityFunctions
extends Object

SecurityFunction implements basic cryptographic functions like hash functions or encryption and decryption functions.

Constructor Summary

Constructors

Constructor and Description
SecurityFunctions()

Method Summary

Modifier and Type	Method and Description
String	decryptAES(byte[] cipherBytes, SecretKey key) Applies an AES decryption on the byte array cipherBytes with they given key.
byte[]	encryptAES(String plainText, SecretKey key) Applies an AES encryption on the string plainText with they given key
SecretKey	generateKey() Generates a key for the AES encryption
String	sha3(String input) Applies SHA-3 hash function on the input string

Methods inherited from class java.lang.Object

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

Constructor Detail

SecurityFunctions

public SecurityFunctions()

Method Detail

sha3

public String sha3(String input)

Applies SHA-3 hash function on the input string

Parameters:

input - the string to apply to SHA-3 hash on

Returns:

the hashed input string

encryptAES

public byte[] encryptAES(String plainText,
                         SecretKey key)

Applies an AES encryption on the string plainText with they given key

Keys have to be generated using the generateKey() function

Parameters:

plainText - the string to encrypt

key - the key to use during the encryption

Returns:

a byte array containing the encrypted data

decryptAES

public String decryptAES(byte[] cipherBytes,
                         SecretKey key)

Applies an AES decryption on the byte array cipherBytes with they given key. The key has to be the same key used during encryption, else null is returned

Parameters:

cipherBytes - the byte array to decrypt

key - the key to use during the decryption

Returns:

the decrypted string if everything was successful, else null

generateKey

public SecretKey generateKey()

Generates a key for the AES encryption

Returns:

a new key for the AES encryption