de.alpharogroup.crypto.pw

Class PasswordEncryptor

java.lang.Object

de.alpharogroup.crypto.pw.PasswordEncryptor

All Implemented Interfaces:

Serializable

public class PasswordEncryptor
extends Object
implements Serializable

The Class PasswordEncryptor is a singleton and helps to generate secure encrypted random passwords.

Author:

Asterios Raptis

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static PasswordEncryptor	getInstance() Gets the single instance of PasswordService.
String	getRandomPassword(int length) Gets a random password.
String	getRandomPassword(Optional<Integer> length) Gets a random password.
String	getRandomSalt(int length) Gets a random salt string.
String	hashAndHexPassword(String password, String salt) Hash and hex password with the given salt.
String	hashAndHexPassword(String password, String salt, HashAlgorithm hashAlgorithm, Charset charset) Hash and hex the given password with the given salt, hash algorithm and charset.
String	hashPassword(String password, String salt, HashAlgorithm hashAlgorithm, Charset charset) Hashes the given password with the given salt, hash algorithm and charset.
boolean	match(String hashedPassword, String dbHashedPassword) Matches the given strings and returns true if they are equal.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static PasswordEncryptor getInstance()

Gets the single instance of PasswordService.

Returns:

single instance of PasswordService

getRandomPassword

public String getRandomPassword(int length)

Gets a random password.

Parameters:

length - the length

Returns:

the new secure random password

getRandomPassword

public String getRandomPassword(Optional<Integer> length)

Gets a random password.

Parameters:

length - the length

Returns:

the new secure random password

getRandomSalt

public String getRandomSalt(int length)

Gets a random salt string.

Parameters:

length - the length

Returns:

the random salt string.

hashAndHexPassword

public String hashAndHexPassword(String password,
                                 String salt)
                          throws NoSuchAlgorithmException,
                                 InvalidKeyException,
                                 UnsupportedEncodingException,
                                 NoSuchPaddingException,
                                 IllegalBlockSizeException,
                                 BadPaddingException

Hash and hex password with the given salt.

Parameters:

password - the password

salt - the salt

Returns:

the string

Throws:

NoSuchAlgorithmException - is thrown if instantiation of the MessageDigest object fails.

UnsupportedEncodingException - is thrown by get the byte array of the private key String object fails.

NoSuchPaddingException - is thrown if instantiation of the cypher object fails.

InvalidKeyException - the invalid key exception is thrown if initialization of the cypher object fails.

BadPaddingException - is thrown if Cipher.doFinal(byte[]) fails.

IllegalBlockSizeException - is thrown if Cipher.doFinal(byte[]) fails.

hashAndHexPassword

public String hashAndHexPassword(String password,
                                 String salt,
                                 HashAlgorithm hashAlgorithm,
                                 Charset charset)
                          throws NoSuchAlgorithmException,
                                 InvalidKeyException,
                                 UnsupportedEncodingException,
                                 NoSuchPaddingException,
                                 IllegalBlockSizeException,
                                 BadPaddingException

Hash and hex the given password with the given salt, hash algorithm and charset.

Parameters:

password - the password

salt - the salt

hashAlgorithm - the hash algorithm

charset - the charset

Returns:

the string

Throws:

NoSuchAlgorithmException - is thrown if instantiation of the MessageDigest object fails.

UnsupportedEncodingException - is thrown by get the byte array of the private key String object fails.

NoSuchPaddingException - is thrown if instantiation of the cypher object fails.

InvalidKeyException - the invalid key exception is thrown if initialization of the cypher object fails.

BadPaddingException - is thrown if Cipher.doFinal(byte[]) fails.

IllegalBlockSizeException - is thrown if Cipher.doFinal(byte[]) fails.

hashPassword

public String hashPassword(String password,
                           String salt,
                           HashAlgorithm hashAlgorithm,
                           Charset charset)
                    throws NoSuchAlgorithmException

Hashes the given password with the given salt, hash algorithm and charset.

Parameters:

password - the password

salt - the salt

hashAlgorithm - the hash algorithm

charset - the charset

Returns:

the string

Throws:

NoSuchAlgorithmException - the no such algorithm exception

match

public boolean match(String hashedPassword,
                     String dbHashedPassword)

Matches the given strings and returns true if they are equal.

Parameters:

hashedPassword - the hashed password

dbHashedPassword - the db hashed password

Returns:

true, if successful