Package tilda.utils

Class EncryptionUtil

java.lang.Object

tilda.utils.EncryptionUtil

public class EncryptionUtil
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
protected static org.apache.logging.log4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
EncryptionUtil()

Method Summary

Modifier and Type	Method	Description
static java.lang.String	aes(java.lang.String plaintext, java.lang.String aesKeyStr)
static java.lang.String	bytesToHex(byte[] digest)
static java.lang.String	getToken(int size)	A short-hand version of getToken(int, boolean) with alphaNumOnly set to false
static java.lang.String	getToken(int size, boolean alphaNumOnly)	Generates a random string with "size" characters.
static java.lang.String	hash(java.lang.String plaintext, java.lang.String salt)	For text-base hashing, for example for a password to be saved in a database text field, this method uses the strongest available SHA function (i.e., at this time, SHA-512).
static byte[]	hash256(java.lang.String plaintext, java.lang.String salt)	Returns a byte array for a SHA-256 digest derived from plaintext.
protected static byte[]	hashByteArrray(java.lang.String plainText, java.lang.String salt, java.lang.String shaAlgo)
protected static java.lang.String	hashStr(java.lang.String plaintext, java.lang.String salt, java.lang.String algo)
protected static java.lang.String	hmac(java.lang.String plaintext, java.lang.String key, java.lang.String algo)
static java.lang.String	hmacSHA1(java.lang.String plaintext, java.lang.String key)
static java.lang.String	hmacSHA256(java.lang.String plaintext, java.lang.String key)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

protected static final org.apache.logging.log4j.Logger LOG

Constructor Detail

EncryptionUtil

public EncryptionUtil()

Method Detail

hash

public static java.lang.String hash(java.lang.String plaintext,
                                    java.lang.String salt)

For text-base hashing, for example for a password to be saved in a database text field, this method uses the strongest available SHA function (i.e., at this time, SHA-512). You are responsible for salting the plaintext for stronger pswd protection. A Base64 String is returned.

Parameters:

plaintext - The plaintext password.

salt - The salt, which could be empty, or null (for no salt).

Returns:

hash256

public static byte[] hash256(java.lang.String plaintext,
                             java.lang.String salt)

Returns a byte array for a SHA-256 digest derived from plaintext. This is meant primarily to be used as a key to an AES256 encryption algorithm.
For text-base hashing, for example for a password to be saved in a database text field, make sure you use the plain #hash(String).

Parameters:

plaintext -

Returns:

hashStr

protected static java.lang.String hashStr(java.lang.String plaintext,
                                          java.lang.String salt,
                                          java.lang.String algo)

hashByteArrray

protected static byte[] hashByteArrray(java.lang.String plainText,
                                       java.lang.String salt,
                                       java.lang.String shaAlgo)

getToken

public static java.lang.String getToken(int size)

A short-hand version of getToken(int, boolean) with alphaNumOnly set to false

Parameters:

size - The size of the returned String. If size is < 8, then it will be changed to 8. If it's > 254, it will be changed to 254.

Returns:

A string of random characters of a minimum size of 8, and maximum size of 254.

getToken

public static java.lang.String getToken(int size,
                                        boolean alphaNumOnly)

Generates a random string with "size" characters.

Parameters:

size - The size of the returned String. If size is < 8, then it will be changed to 8. If it's > 254, it will be changed to 254.

alphaNumOnly - Whether the returned random string should only contain alphanumeric characters or not.

Returns:

A string of random characters of a minimum size of 8, and maximum size of 254.

bytesToHex

public static java.lang.String bytesToHex(byte[] digest)

aes

public static java.lang.String aes(java.lang.String plaintext,
                                   java.lang.String aesKeyStr)

hmacSHA1

public static java.lang.String hmacSHA1(java.lang.String plaintext,
                                        java.lang.String key)
                                 throws java.lang.Exception

Throws:

java.lang.Exception

hmacSHA256

public static java.lang.String hmacSHA256(java.lang.String plaintext,
                                          java.lang.String key)
                                   throws java.lang.Exception

Throws:

java.lang.Exception

hmac

protected static java.lang.String hmac(java.lang.String plaintext,
                                       java.lang.String key,
                                       java.lang.String algo)
                                throws java.security.NoSuchAlgorithmException,
                                       java.security.InvalidKeyException,
                                       java.io.UnsupportedEncodingException

Throws:

java.security.NoSuchAlgorithmException

java.security.InvalidKeyException

java.io.UnsupportedEncodingException