de.innovationgate.utils

Class DESEncrypter

java.lang.Object

de.innovationgate.utils.DESEncrypter

Deprecated.

Use SymmetricEncryptionEngine instead

public class DESEncrypter
extends java.lang.Object

simple DES encrypter used to encrypt tml:form hidden fields

Usage:

• Create DESEncrypter
• Initialize DESEncrypter with one init...() method
• Use it to encrypt/decrypt

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DESEncrypter.PersistentKeyException Deprecated. thrown when a key cannot be written or restored from filesystem

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	SYSPROP_DESENCRYPTER_ALGORITHM Deprecated.

Constructor Summary

Constructors

Constructor and Description
DESEncrypter() Deprecated. constructs a DESEncrypter init or init(File) must be called before use

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	decrypt(java.lang.String str) Deprecated. Decrypts the given string to original bytes
java.lang.String	decryptString(java.lang.String str) Deprecated. Decrypts a string encrypted with encryptString(String)
java.lang.String	encrypt(byte[] input) Deprecated. Encrypts the given bytes to a string
java.lang.String	encryptString(java.lang.String str) Deprecated. Encrypts a string based on its UTF-8 bytes values
java.lang.String	getAlgorithm() Deprecated.
javax.crypto.Cipher	getDcipher() Deprecated. Returns the decryption cipher
javax.crypto.Cipher	getEcipher() Deprecated. Returns the encryption cipher
java.security.Key	getKey() Deprecated. Returns the key instance used for encryption/decryption
void	init() Deprecated. Initializes the DESEncrypter with a temporarily generated key
void	init(java.io.File keyFile) Deprecated. Initializes the DESEncrypter reading a encryption key from a file.
void	init(java.io.InputStream in) Deprecated. Initializes the DESEncrypter reading a encryption key from an input stream.
void	init(java.security.Key key) Deprecated. Initializes the DESEncrypter using the given key instance
void	init(java.lang.String keyStr) Deprecated. Initializes the DESEncrypter using the MD5 hash of a custom string key as encryption key.
void	initObfuscation() Deprecated. Initializes the DESEncrypter using an obfuscation key
void	writeCodeFile(java.io.File codeFile) Deprecated. Stores the encryption key to a file in a platform-independent manner.

Methods inherited from class java.lang.Object

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

Field Detail

SYSPROP_DESENCRYPTER_ALGORITHM

public static final java.lang.String SYSPROP_DESENCRYPTER_ALGORITHM

Deprecated.

See Also:

Constant Field Values

Constructor Detail

DESEncrypter

public DESEncrypter()

Deprecated.

constructs a DESEncrypter init or init(File) must be called before use

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

Deprecated.

init

public void init()
          throws java.security.GeneralSecurityException

Deprecated.

Initializes the DESEncrypter with a temporarily generated key

Throws:

java.security.GeneralSecurityException

init

public void init(java.io.InputStream in)
          throws DESEncrypter.PersistentKeyException,
                 java.security.GeneralSecurityException,
                 java.io.IOException

Deprecated.

Initializes the DESEncrypter reading a encryption key from an input stream. This variant reads keys stored in a platform-independentm manner (like with writeCodeFile(File))

Parameters:

in - The input stream to read from

Throws:

DESEncrypter.PersistentKeyException

java.security.GeneralSecurityException

java.io.IOException

init

public void init(java.lang.String keyStr)
          throws java.io.UnsupportedEncodingException,
                 java.security.GeneralSecurityException

Deprecated.

Initializes the DESEncrypter using the MD5 hash of a custom string key as encryption key. Uses AES 128 bit encryption.

Parameters:

keyStr - The key string

Throws:

java.io.UnsupportedEncodingException

java.security.GeneralSecurityException

initObfuscation

public void initObfuscation()
                     throws DESEncrypter.PersistentKeyException,
                            java.security.GeneralSecurityException,
                            java.io.IOException

Deprecated.

Initializes the DESEncrypter using an obfuscation key

Throws:

DESEncrypter.PersistentKeyException

java.security.GeneralSecurityException

java.io.IOException

init

public void init(java.io.File keyFile)
          throws java.security.GeneralSecurityException,
                 DESEncrypter.PersistentKeyException

Deprecated.

Initializes the DESEncrypter reading a encryption key from a file. If the keyfile does not exist a new key is generated and written to the file. Key files written with this method may not be usable across different VM encryption implementations since they rely on object serialisation.

Parameters:

keyFile - The key file

Throws:

java.security.GeneralSecurityException

DESEncrypter.PersistentKeyException

init

public void init(java.security.Key key)
          throws java.security.GeneralSecurityException

Deprecated.

Initializes the DESEncrypter using the given key instance

Parameters:

key -

Throws:

java.security.GeneralSecurityException

encrypt

public java.lang.String encrypt(byte[] input)
                         throws java.io.UnsupportedEncodingException

Deprecated.

Encrypts the given bytes to a string

Parameters:

input - The bytes to encrypt

Returns:

The encrypted string

Throws:

java.io.UnsupportedEncodingException

decrypt

public byte[] decrypt(java.lang.String str)

Deprecated.

Decrypts the given string to original bytes

Parameters:

str - The encrypted string

Returns:

The decrypted bytes or null if it could not be decrypted

decryptString

public java.lang.String decryptString(java.lang.String str)
                               throws java.io.UnsupportedEncodingException

Deprecated.

Decrypts a string encrypted with encryptString(String)

Parameters:

str -

Returns:

Decrypted string

Throws:

java.io.UnsupportedEncodingException

encryptString

public java.lang.String encryptString(java.lang.String str)
                               throws java.io.UnsupportedEncodingException

Deprecated.

Encrypts a string based on its UTF-8 bytes values

Parameters:

str -

Returns:

The encrypted string

Throws:

java.io.UnsupportedEncodingException

getKey

public java.security.Key getKey()

Deprecated.

Returns the key instance used for encryption/decryption

getDcipher

public javax.crypto.Cipher getDcipher()

Deprecated.

Returns the decryption cipher

getEcipher

public javax.crypto.Cipher getEcipher()

Deprecated.

Returns the encryption cipher

writeCodeFile

public void writeCodeFile(java.io.File codeFile)
                   throws java.io.IOException

Deprecated.

Stores the encryption key to a file in a platform-independent manner.

Parameters:

codeFile - The key file to write

Throws:

java.io.IOException