info.pppc.base.security

Interface ISymmetricKey

All Superinterfaces:

IPrivateKey, IPublicKey

All Known Subinterfaces:

ISymEncryptionKey, ISymSigningKey

All Known Implementing Classes:

AESSymmetricKey, HMACSymmetricKey

public interface ISymmetricKey
extends IPublicKey, IPrivateKey

An interface for symmetric keys, which combine the ability of public and private asymmetric keys. Since usually one key is used for encryption OR for signing, additional methods are necessary to use the key in the right way.

Author:

WA

Field Summary

Fields

Modifier and Type	Field and Description
static long	TIMESTAMP_MANUAL The time stamp for manually distributed session keys.
static long	TIMESTAMP_MISSING The time stamp that signals missing session keys.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	forEncryption() If this symmetric key can be used for encryption, this method will return true.
boolean	forSigning() If this symmetric key can be used to create signatures, this method will return true.
SystemID	getCorrespondingSystemID()
byte[]	getKey() Get the key as a byte array.
long	getTimestamp() Returns the time stamp of a symmetric key or TIMESTAMP_MISSING, if there is no entry for the key.

Methods inherited from interface info.pppc.base.security.IPublicKey

encryptMessage, equals, verifySignature

Methods inherited from interface info.pppc.base.security.IPrivateKey

createSignature, decryptMessage, equals

Field Detail

TIMESTAMP_MANUAL

static final long TIMESTAMP_MANUAL

The time stamp for manually distributed session keys.

See Also:

Constant Field Values

TIMESTAMP_MISSING

static final long TIMESTAMP_MISSING

The time stamp that signals missing session keys.

See Also:

Constant Field Values

Method Detail

getCorrespondingSystemID

SystemID getCorrespondingSystemID()

forEncryption

boolean forEncryption()

If this symmetric key can be used for encryption, this method will return true.

Returns:

True, if this key can be used for encryption

forSigning

boolean forSigning()

If this symmetric key can be used to create signatures, this method will return true.

Returns:

True, if this key can be used to create signatures

getTimestamp

long getTimestamp()

Returns the time stamp of a symmetric key or TIMESTAMP_MISSING, if there is no entry for the key.

Returns:

The time stamp of the key.

getKey

byte[] getKey()

Get the key as a byte array.

Returns:

The key of this implementation of ISymmetricKey.