Package net.handle.security

Class HdlSecurityProvider

java.lang.Object

net.handle.security.HdlSecurityProvider

Direct Known Subclasses:

GenericProvider

public abstract class HdlSecurityProvider
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ENCRYPT_ALG_AES
static final int	ENCRYPT_ALG_DES
static final int	ENCRYPT_ALG_DESEDE

Constructor Summary

Constructors

Constructor	Description
HdlSecurityProvider()

Method Summary

Modifier and Type	Method	Description
KeyPair	generateDHKeyPair(int keySize)
KeyPair	generateDHKeyPair(BigInteger p, BigInteger g)
abstract byte[]	generateSecretKey(int keyAlg)	Generate and encode a secret key for use with the given algorithm
Cipher	getCipher(int algorithm, byte[] secretKey, int direction)	Deprecated. Use getCipher(int,byte[],int,byte[],int,int) in order to specify protocol version.
abstract Cipher	getCipher(int algorithm, byte[] secretKey, int direction, byte[] iv, int majorProtocolVersion, int minorProtocolVersion)	Construct and return a Cipher object, initialized to either decrypt or encrypt using the given algorithm and secret key.
byte[]	getDESKeyFromDH(DHPublicKey pub, DHPrivateKey priv)
static final HdlSecurityProvider	getInstance()
abstract int	getIvSize(int algorithm, int majorProtocolVersion, int minorProtocolVersion)	Returns the length in bytes of the initialization vector used by the cipher generated by getCipher().
byte[]	getKeyFromDH(DHPublicKey pub, DHPrivateKey priv, int algorithm)	Using the given diffie-hellman key pair, generate a secret key with the given algorithm.

Methods inherited from class java.lang.Object

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

Field Details

ENCRYPT_ALG_DES

public static final int ENCRYPT_ALG_DES

See Also:

• Constant Field Values

ENCRYPT_ALG_DESEDE

public static final int ENCRYPT_ALG_DESEDE

See Also:

• Constant Field Values

ENCRYPT_ALG_AES

public static final int ENCRYPT_ALG_AES

See Also:

• Constant Field Values

Constructor Details

HdlSecurityProvider

public HdlSecurityProvider()

Method Details

getInstance

public static final HdlSecurityProvider getInstance()

getCipher

@Deprecated
public Cipher getCipher(int algorithm,
 byte[] secretKey,
 int direction)
                 throws Exception

Deprecated.

Use getCipher(int,byte[],int,byte[],int,int) in order to specify protocol version.

Throws:

Exception

getCipher

public abstract Cipher getCipher(int algorithm,
 byte[] secretKey,
 int direction,
 byte[] iv,
 int majorProtocolVersion,
 int minorProtocolVersion)
                          throws Exception

Construct and return a Cipher object, initialized to either decrypt or encrypt using the given algorithm and secret key. The direction parameter must be either Cipher.ENCRYPT_MODE or Cipher.DECRYPT_MODE. The algorithm parameter should be one of the HdlSecurityProvider.ENCRYPT_ALG_* constants. iv is the initialization vector, needed for decrypting with CBC.

Throws:

Exception

getIvSize

public abstract int getIvSize(int algorithm,
 int majorProtocolVersion,
 int minorProtocolVersion)

Returns the length in bytes of the initialization vector used by the cipher generated by getCipher(). Returns 0 if no initialization vector.

generateSecretKey

public abstract byte[] generateSecretKey(int keyAlg)
                                  throws Exception

Generate and encode a secret key for use with the given algorithm

Throws:

Exception

generateDHKeyPair

public KeyPair generateDHKeyPair(int keySize)
                          throws Exception

Throws:

Exception

generateDHKeyPair

public KeyPair generateDHKeyPair(BigInteger p,
 BigInteger g)
                          throws Exception

Throws:

Exception

getDESKeyFromDH

public byte[] getDESKeyFromDH(DHPublicKey pub,
 DHPrivateKey priv)
                       throws Exception

Throws:

Exception

getKeyFromDH

public byte[] getKeyFromDH(DHPublicKey pub,
 DHPrivateKey priv,
 int algorithm)
                    throws Exception

Using the given diffie-hellman key pair, generate a secret key with the given algorithm. The first four bytes of the secret key will identify the algorithm for the secret key (DES, AES, DESede)

Throws:

Exception