Package alpine.crypto

Class DataEncryption

java.lang.Object

alpine.crypto.DataEncryption

public class DataEncryption
extends Object

This class performs symmetric encryption of data using the system-defined secret key. The encryption routines in this class require the use of the unlimited strength policy files, included in the most recent versions of Java by default. Older Java versions may need to install the policy files for the methods in this class to function correctly.

Since:

1.3.0

Author:

Steve Springett

Method Summary

Modifier and Type	Method	Description
static byte[]	decryptAsBytes(byte[] encryptedIvTextBytes)	Decrypts the specified bytes using AES-256.
static byte[]	decryptAsBytes(SecretKey secretKey, byte[] encryptedIvTextBytes)	Decrypts the specified bytes using AES-256.
static String	decryptAsString(String encryptedText)	Decrypts the specified string using AES-256.
static String	decryptAsString(SecretKey secretKey, String encryptedText)	Decrypts the specified string using AES-256.
static byte[]	encryptAsBytes(String plainText)	Encrypts the specified plainText using AES-256.
static byte[]	encryptAsBytes(SecretKey secretKey, String plainText)	Encrypts the specified plainText using AES-256.
static String	encryptAsString(String plainText)	Encrypts the specified plainText using AES-256 and returns a Base64 encoded representation of the encrypted bytes.
static String	encryptAsString(SecretKey secretKey, String plainText)	Encrypts the specified plainText using AES-256 and returns a Base64 encoded representation of the encrypted bytes.

Methods inherited from class java.lang.Object

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

Method Detail

encryptAsBytes

public static byte[] encryptAsBytes(SecretKey secretKey,
                                    String plainText)
                             throws Exception

Encrypts the specified plainText using AES-256.

Parameters:

plainText - the text to encrypt

secretKey - the secret key to use to encrypt with

Returns:

the encrypted bytes

Throws:

Exception - a number of exceptions may be thrown

Since:

1.3.0

encryptAsBytes

public static byte[] encryptAsBytes(String plainText)
                             throws Exception

Encrypts the specified plainText using AES-256. This method uses the default secret key.

Parameters:

plainText - the text to encrypt

Returns:

the encrypted bytes

Throws:

Exception - a number of exceptions may be thrown

Since:

1.3.0

encryptAsString

public static String encryptAsString(SecretKey secretKey,
                                     String plainText)
                              throws Exception

Encrypts the specified plainText using AES-256 and returns a Base64 encoded representation of the encrypted bytes.

Parameters:

secretKey - the secret key to use to encrypt with

plainText - the text to encrypt

Returns:

a Base64 encoded representation of the encrypted bytes

Throws:

Exception - a number of exceptions may be thrown

Since:

1.3.0

encryptAsString

public static String encryptAsString(String plainText)
                              throws Exception

Encrypts the specified plainText using AES-256 and returns a Base64 encoded representation of the encrypted bytes. This method uses the default secret key.

Parameters:

plainText - the text to encrypt

Returns:

a Base64 encoded representation of the encrypted bytes

Throws:

Exception - a number of exceptions may be thrown

Since:

1.3.0

decryptAsBytes

public static byte[] decryptAsBytes(SecretKey secretKey,
                                    byte[] encryptedIvTextBytes)
                             throws Exception

Decrypts the specified bytes using AES-256.

Parameters:

secretKey - the secret key to decrypt with

encryptedIvTextBytes - the text to decrypt

Returns:

the decrypted bytes

Throws:

Exception - a number of exceptions may be thrown

Since:

1.3.0

decryptAsBytes

public static byte[] decryptAsBytes(byte[] encryptedIvTextBytes)
                             throws Exception

Decrypts the specified bytes using AES-256. This method uses the default secret key.

Parameters:

encryptedIvTextBytes - the text to decrypt

Returns:

the decrypted bytes

Throws:

Exception - a number of exceptions may be thrown

Since:

1.3.0

decryptAsString

public static String decryptAsString(SecretKey secretKey,
                                     String encryptedText)
                              throws Exception

Decrypts the specified string using AES-256. The encryptedText is expected to be the Base64 encoded representation of the encrypted bytes generated from encryptAsString(String).

Parameters:

secretKey - the secret key to decrypt with

encryptedText - the text to decrypt

Returns:

the decrypted string

Throws:

Exception - a number of exceptions may be thrown

Since:

1.3.0

decryptAsString

public static String decryptAsString(String encryptedText)
                              throws Exception

Decrypts the specified string using AES-256. The encryptedText is expected to be the Base64 encoded representation of the encrypted bytes generated from encryptAsString(String). This method uses the default secret key.

Parameters:

encryptedText - the text to decrypt

Returns:

the decrypted string

Throws:

Exception - a number of exceptions may be thrown

Since:

1.3.0