org.mozilla.jss.SecretDecoderRing

Class KeyManager

public class KeyManager extends Object

Creates, finds, and deletes keys for SecretDecoderRing.
Field Summary
static KeyGenAlgorithmDEFAULT_KEYGEN_ALG
The default key generation algorithm, currently DES3.
static intDEFAULT_KEYSIZE
The default key size (in bytes).
Constructor Summary
KeyManager(CryptoToken token)
Creates a new KeyManager using the given CryptoToken.
Method Summary
voiddeleteKey(byte[] keyID)
Deletes the key with the given keyID from this token.
voiddeleteKey(SecretKey key)
Deletes this key from this token.
voiddeleteUniqueNamedKey(String nickname)
If it exists, delete the key with the specified nickname from this token.
byte[]generateKey()
Generates an SDR key with the default algorithm and key size.
byte[]generateKey(KeyGenAlgorithm alg, int keySize)
Generates an SDR key with the given algorithm and key size.
byte[]generateUniqueNamedKey(String nickname)
Generates an SDR key with the default algorithm and key size. and names it with the specified nickname.
byte[]generateUniqueNamedKey(KeyGenAlgorithm alg, int keySize, String nickname)
Generates an SDR key with the given algorithm, key size, and nickname.
SecretKeylookupKey(EncryptionAlgorithm alg, byte[] keyid)
Looks up the key on this token with the given algorithm and key ID.
SecretKeylookupUniqueNamedKey(EncryptionAlgorithm alg, String nickname)
Looks up the key on this token with the given algorithm and nickname.
booleanuniqueNamedKeyExists(String nickname)

Field Detail

DEFAULT_KEYGEN_ALG

public static final KeyGenAlgorithm DEFAULT_KEYGEN_ALG
The default key generation algorithm, currently DES3.

DEFAULT_KEYSIZE

public static final int DEFAULT_KEYSIZE
The default key size (in bytes). This is only relevant for algorithms with variable-length keys, such as AES.

Constructor Detail

KeyManager

public KeyManager(CryptoToken token)
Creates a new KeyManager using the given CryptoToken.

Parameters: token The token on which this KeyManager operates.

Method Detail

deleteKey

public void deleteKey(byte[] keyID)
Deletes the key with the given keyID from this token.

Throws: InvalidKeyException If the key does not exist on this token.

deleteKey

public void deleteKey(SecretKey key)
Deletes this key from this token.

Throws: InvalidKeyException If the key does not reside on this token, or is not a JSS key.

deleteUniqueNamedKey

public void deleteUniqueNamedKey(String nickname)
If it exists, delete the key with the specified nickname from this token.

generateKey

public byte[] generateKey()
Generates an SDR key with the default algorithm and key size. The default algorithm is stored in the constant DEFAULT_KEYGEN_ALG. The default key size is stored in the constant DEFAULT_KEYSIZE.

Returns: The keyID of the generated key. A random keyID will be chosen that is not currently used on the token. The keyID must be stored by the application in order to use this key for encryption in the future.

generateKey

public byte[] generateKey(KeyGenAlgorithm alg, int keySize)
Generates an SDR key with the given algorithm and key size.

Parameters: keySize Length of key in bytes. This is only relevant for algorithms that take more than one key size. Otherwise it can just be set to 0.

Returns: The keyID of the generated key. A random keyID will be chosen that is not currently used on the token. The keyID must be stored by the application in order to use this key for encryption in the future.

generateUniqueNamedKey

public byte[] generateUniqueNamedKey(String nickname)
Generates an SDR key with the default algorithm and key size. and names it with the specified nickname. The default algorithm is stored in the constant DEFAULT_KEYGEN_ALG. The default key size is stored in the constant DEFAULT_KEYSIZE.

Parameters: nickname the name of the symmetric key. Duplicate keynames will be checked for, and are not allowed.

Returns: The keyID of the generated key. A random keyID will be chosen that is not currently used on the token. The keyID must be stored by the application in order to use this key for encryption in the future.

generateUniqueNamedKey

public byte[] generateUniqueNamedKey(KeyGenAlgorithm alg, int keySize, String nickname)
Generates an SDR key with the given algorithm, key size, and nickname.

Parameters: alg The algorithm that this key will be used for. This is necessary because it will be stored along with the key for later use by the security library. keySize Length of key in bytes. This is only relevant for algorithms that take more than one key size. Otherwise it can just be set to 0. nickname the name of the symmetric key. Duplicate keynames will be checked for, and are not allowed.

Returns: The keyID of the generated key. A random keyID will be chosen that is not currently used on the token. The keyID must be stored by the application in order to use this key for encryption in the future.

lookupKey

public SecretKey lookupKey(EncryptionAlgorithm alg, byte[] keyid)
Looks up the key on this token with the given algorithm and key ID.

Parameters: alg The algorithm that this key will be used for. This is necessary because it will be stored along with the key for later use by the security library. It should match the actual algorithm of the key you are looking for. If you pass in a different algorithm and try to use the key that is returned, the results are undefined.

Returns: The key, or null if the key is not found.

lookupUniqueNamedKey

public SecretKey lookupUniqueNamedKey(EncryptionAlgorithm alg, String nickname)
Looks up the key on this token with the given algorithm and nickname.

Parameters: alg The algorithm that this key will be used for. This is necessary because it will be stored along with the key for later use by the security library. It should match the actual algorithm of the key you are looking for. If you pass in a different algorithm and try to use the key that is returned, the results are undefined. nickname the name of the symmetric key. Duplicate keynames will be checked for, and are not allowed.

Returns: The key, or null if the key is not found.

uniqueNamedKeyExists

public boolean uniqueNamedKeyExists(String nickname)