com.communote.common.encryption

Class EncryptionUtils

java.lang.Object

com.communote.common.encryption.EncryptionUtils

public class EncryptionUtils
extends Object

Author:

Communote GmbH - http://www.communote.com/

Method Summary

Modifier and Type	Method and Description
static String	decrypt(String encryptedText, String password) Decrypts text and returns the readable clear text.
static String	encrypt(String clearText, String password) Encrypt the clear text and adds a random salt.
static String	encrypt(String clearText, String password, byte[] salt) Encrypt the clear text with a defined salt.
static byte[]	generateSalt() Generates secure random bytes.
static byte[]	generateSalt(int saltSize) Generates secure random bytes.
static String	getSalt(String encryptedText) returns the stored salt (encoded) of a encrypted value

Methods inherited from class java.lang.Object

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

Method Detail

decrypt

public static String decrypt(String encryptedText,
                             String password)
                      throws EncryptionException

Decrypts text and returns the readable clear text. If the encrypted input is blank then it is returned without processing.

Parameters:

encryptedText - the encrypted string (required)

password - the password (required)

Returns:

the decrypted version of text

Throws:

EncryptionException - in the event of an encryption failure

encrypt

public static String encrypt(String clearText,
                             String password)
                      throws EncryptionException

Encrypt the clear text and adds a random salt. If the input text is blank then it is returned without processing.

Parameters:

clearText - the string to encrypt (required)

password - the password (required)

Returns:

the encrypted version of the text

Throws:

EncryptionException - in the event of an encryption failure

encrypt

public static String encrypt(String clearText,
                             String password,
                             byte[] salt)
                      throws EncryptionException

Encrypt the clear text with a defined salt. If the input text is blank then it is returned without processing.

Parameters:

clearText - the string to encrypt (required)

salt - a predefined salt added to the clear text (required)

password - the password (required)

Returns:

the encrypted version of the text

Throws:

EncryptionException - in the event of an encryption failure

generateSalt

public static byte[] generateSalt()

Generates secure random bytes.

Returns:

a secure random salt with a size of bytes

generateSalt

public static byte[] generateSalt(int saltSize)

Generates secure random bytes.

Parameters:

saltSize - the length for the salt in bytes

Returns:

a secure random salt

Since:

3.5

getSalt

public static String getSalt(String encryptedText)

returns the stored salt (encoded) of a encrypted value

Parameters:

encryptedText - the encrypted text

Returns:

the salt of the encryption