Package rs.baselib.crypto

Class Encrypter

java.lang.Object

rs.baselib.crypto.Encrypter

public class Encrypter
extends Object

Class for encrypting strings.

Author:

ralph

Constructor Summary

Constructors

Constructor	Description
Encrypter(byte[] bytephrase, byte[] salt, int iterationCount)	Constructor from passphrase, salt and iteration spec.
Encrypter(char[] passphrase)	Constructor from passphrase.
Encrypter(char[] passphrase, byte[] salt)	Constructor from passphrase.
Encrypter(String passphrase)	Constructor from passphrase.
Encrypter(String passphrase, byte[] salt)	Constructor from passphrase.
Encrypter(String passPhrase, byte[] salt, int iterationCount)	Constructor from passphrase, salt and iteration spec.
Encrypter(Key key, String algorithm)	Constructor from secret key.
Encrypter(Key key, String algorithm, byte[] salt, int iterationCount)	Constructor from secret key.
Encrypter(Key key, String algorithm, AlgorithmParameterSpec paramSpec)	Constructor from secret key.
Encrypter(Cipher eCipher)	Constructor from secret key.

Method Summary

Modifier and Type	Method	Description
byte[]	encrypt(byte[] bytes)	Encrypt a byte array
String	encrypt(String str)	Takes a single String as an argument and returns an encrypted version of that string.
String	getAlgorithm()	Returns the algorithm.
AlgorithmParameterSpec	getAlgorithmParameterSpec()	Returns the algorithmParameterSpec.

Methods inherited from class java.lang.Object

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

Constructor Details

Encrypter

public Encrypter(Cipher eCipher)

Constructor from secret key.

Parameters:

eCipher - the cipher to be used

Encrypter

public Encrypter(Key key,
 String algorithm)
          throws EncryptionException

Constructor from secret key.

Parameters:

key - the secret key to be used

algorithm - algorithm (key's algorithm will be used if NULL)

Throws:

EncryptionException - when encrypting algorithm cannot be generated

Encrypter

public Encrypter(Key key,
 String algorithm,
 AlgorithmParameterSpec paramSpec)
          throws EncryptionException

Constructor from secret key.

Parameters:

key - the secret key to be used

algorithm - algorithm (key's algorithm will be used if NULL)

paramSpec - parameters to the encrypting algorithm (will be generated if NULL)

Throws:

EncryptionException - when encrypting algorithm cannot be generated

Encrypter

public Encrypter(Key key,
 String algorithm,
 byte[] salt,
 int iterationCount)
          throws EncryptionException

Constructor from secret key.

Parameters:

key - the secret key to be used

algorithm - algorithm (key's algorithm will be used if NULL)

salt - salt to be used

iterationCount - number of iterations for encryption

Throws:

EncryptionException - when encrypting algorithm cannot be generated

Encrypter

public Encrypter(byte[] bytephrase,
 byte[] salt,
 int iterationCount)
          throws EncryptionException,
UnsupportedEncodingException

Constructor from passphrase, salt and iteration spec.

Parameters:

bytephrase - passphrase to be used

salt - salt to be used

iterationCount - number of iterations for encryption

Throws:

EncryptionException - when encrypting algorithm cannot be generated

UnsupportedEncodingException - when encoding cannot be found

Encrypter

public Encrypter(char[] passphrase)
          throws EncryptionException

Constructor from passphrase.

Parameters:

passphrase - passphrase to be used

Throws:

EncryptionException - when encrypting algorithm cannot be generated

Encrypter

public Encrypter(char[] passphrase,
 byte[] salt)
          throws EncryptionException

Constructor from passphrase.

Parameters:

passphrase - passphrase to be used

salt - salt to be used

Throws:

EncryptionException - when encrypting algorithm cannot be generated

Encrypter

public Encrypter(String passphrase)
          throws EncryptionException

Constructor from passphrase.

Parameters:

passphrase - passphrase to be used

Throws:

EncryptionException - when encrypting algorithm cannot be generated

Encrypter

public Encrypter(String passphrase,
 byte[] salt)
          throws EncryptionException

Constructor from passphrase.

Parameters:

passphrase - passphrase to be used

salt - salt to be used

Throws:

EncryptionException - when encrypting algorithm cannot be generated

Encrypter

public Encrypter(String passPhrase,
 byte[] salt,
 int iterationCount)
          throws EncryptionException

Constructor from passphrase, salt and iteration spec.

Parameters:

passPhrase - passphrase to be used

salt - salt to be used

iterationCount - number of iterations for encryption

Throws:

EncryptionException - when encrypting algorithm cannot be generated

Method Details

getAlgorithm

public String getAlgorithm()

Returns the algorithm.

Returns:

the algorithm

getAlgorithmParameterSpec

public AlgorithmParameterSpec getAlgorithmParameterSpec()

Returns the algorithmParameterSpec.

Returns:

the algorithmParameterSpec

encrypt

public String encrypt(String str)
               throws EncryptionException

Takes a single String as an argument and returns an encrypted version of that string.

Parameters:

str - string to be encrypted

Returns:

String encrypted version of the provided String

Throws:

EncryptionException - when encryption fails

encrypt

public byte[] encrypt(byte[] bytes)
               throws EncryptionException

Encrypt a byte array

Parameters:

bytes - bytes to be encrypted

Returns:

byte encrypted version of the provided array

Throws:

EncryptionException - when encryption fails