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java.lang.Objectjavax.crypto.SecretKeyFactory
public class SecretKeyFactory
A secret key factory translates SecretKey
objects to and from
KeySpec
objects, and can translate between
different vendors' representations of SecretKey
objects (for
security or semantics; whichever applies).
SecretKey
Constructor Summary | |
---|---|
protected |
SecretKeyFactory(SecretKeyFactorySpi skfSpi,
Provider provider,
String algorithm)
Create a new secret key factory. |
Method Summary | |
---|---|
SecretKey |
generateSecret(KeySpec keySpec)
Generate a secret key from a key specification, if possible. |
String |
getAlgorithm()
Get the algorithm name. |
static SecretKeyFactory |
getInstance(String algorithm)
Create a new secret key factory from the first appropriate instance. |
static SecretKeyFactory |
getInstance(String algorithm,
Provider provider)
Create a new secret key factory from the specified provider. |
static SecretKeyFactory |
getInstance(String algorithm,
String provider)
Create a new secret key factory from the named provider. |
KeySpec |
getKeySpec(SecretKey key,
Class keySpec)
Get the key specification from a secret key. |
Provider |
getProvider()
Get the provider of this implementation. |
SecretKey |
translateKey(SecretKey key)
Translate a secret key into another form. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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protected SecretKeyFactory(SecretKeyFactorySpi skfSpi, Provider provider, String algorithm)
skfSpi
- The underlying factory implementation.provider
- The provider.algorithm
- The algorithm name.Method Detail |
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public static final SecretKeyFactory getInstance(String algorithm) throws NoSuchAlgorithmException
algorithm
- The algorithm name.
NoSuchAlgorithmException
- If no provider implements the specified
algorithm.
IllegalArgumentException
- if algorithm
is
null
or is an empty string.public static final SecretKeyFactory getInstance(String algorithm, String provider) throws NoSuchAlgorithmException, NoSuchProviderException
algorithm
- The algorithm name.provider
- The provider name.
NoSuchAlgorithmException
- If the named provider does not implement
the algorithm.
NoSuchProviderException
- If the named provider does not exist.
IllegalArgumentException
- if either algorithm
or
provider
is null
, or if
algorithm
is an empty string.public static final SecretKeyFactory getInstance(String algorithm, Provider provider) throws NoSuchAlgorithmException
algorithm
- The algorithm name.provider
- The provider.
NoSuchAlgorithmException
- If the provider does not implement the
algorithm.
IllegalArgumentException
- if either algorithm
or
provider
is null
, or if
algorithm
is an empty string.public final SecretKey generateSecret(KeySpec keySpec) throws InvalidKeySpecException
keySpec
- The key specification.
java.security.InvalidKeySpecException
- If the key specification
cannot be transformed into a secret key.
InvalidKeySpecException
public final String getAlgorithm()
public final KeySpec getKeySpec(SecretKey key, Class keySpec) throws InvalidKeySpecException
key
- The secret key.keySpec
- The target key specification class.
InvalidKeySpecException
- If the secret key cannot
be transformed into the specified key specification.public final Provider getProvider()
public final SecretKey translateKey(SecretKey key) throws InvalidKeyException
key
- The key to translate.
InvalidKeyException
- If the argument cannot be
translated.
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