de.florianmichael.rclasses.common.encryption

Class EncryptionUtils

java.lang.Object

de.florianmichael.rclasses.common.encryption.EncryptionUtils

public class EncryptionUtils
extends java.lang.Object

Utility class for encryption.

Constructor Summary

Constructors

Constructor and Description
EncryptionUtils()

Method Summary

Modifier and Type	Method and Description
static AES	aes(javax.crypto.spec.IvParameterSpec initialVector, javax.crypto.SecretKey secretKey)
static AES	aes(javax.crypto.SecretKey secretKey)
static Base64	base64()
static int	complementaryOffset(int offset)
static javax.crypto.SecretKey	fromIterationCount(int n)
static javax.crypto.SecretKey	fromString(java.lang.String key)
static javax.crypto.SecretKey	fromString(java.lang.String key, byte[] salt)
static javax.crypto.SecretKey	fromString(java.lang.String key, byte[] salt, int iterationCount)
static javax.crypto.SecretKey	fromString(java.lang.String key, byte[] salt, int iterationCount, int keyLength)
static javax.crypto.spec.IvParameterSpec	generateIv()
static Rot13	rot13(int offset)

Methods inherited from class java.lang.Object

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

Constructor Detail

EncryptionUtils

public EncryptionUtils()

Method Detail

base64

public static Base64 base64()

aes

public static AES aes(javax.crypto.SecretKey secretKey)

aes

public static AES aes(javax.crypto.spec.IvParameterSpec initialVector,
                      javax.crypto.SecretKey secretKey)

rot13

public static Rot13 rot13(int offset)

complementaryOffset

public static int complementaryOffset(int offset)

Parameters:

offset - The offset.

Returns:

The complementary offset.

generateIv

public static javax.crypto.spec.IvParameterSpec generateIv()

Returns:

A random generated IV.

fromIterationCount

public static javax.crypto.SecretKey fromIterationCount(int n)
                                                 throws java.security.NoSuchAlgorithmException

Parameters:

n - The iteration count.

Returns:

A secret key generated with the given iteration count.

Throws:

java.security.NoSuchAlgorithmException

fromString

public static javax.crypto.SecretKey fromString(java.lang.String key)
                                         throws java.security.spec.InvalidKeySpecException

Parameters:

key - The key as string.

Returns:

A secret key generated with the given key string.

Throws:

java.security.spec.InvalidKeySpecException - If the key is invalid.

fromString

public static javax.crypto.SecretKey fromString(java.lang.String key,
                                                byte[] salt)
                                         throws java.security.spec.InvalidKeySpecException

Parameters:

key - The key as string.

salt - The salt.

Returns:

A secret key generated with the given key string and salt.

Throws:

java.security.spec.InvalidKeySpecException - If the key is invalid.

fromString

public static javax.crypto.SecretKey fromString(java.lang.String key,
                                                byte[] salt,
                                                int iterationCount)
                                         throws java.security.spec.InvalidKeySpecException

Parameters:

key - The key as string.

salt - The salt.

iterationCount - The iteration count.

Returns:

A secret key generated with the given key string, salt and iteration count.

Throws:

java.security.spec.InvalidKeySpecException - If the key is invalid.

fromString

public static javax.crypto.SecretKey fromString(java.lang.String key,
                                                byte[] salt,
                                                int iterationCount,
                                                int keyLength)
                                         throws java.security.spec.InvalidKeySpecException

Parameters:

key - The key as string.

salt - The salt.

iterationCount - The iteration count.

keyLength - The key length.

Returns:

A secret key generated with the given key string, salt, iteration count and key length.

Throws:

java.security.spec.InvalidKeySpecException - If the key is invalid.