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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 |
|---|
protected SecretKeyFactory(SecretKeyFactorySpi skfSpi,
Provider provider,
String algorithm)
skfSpi - The underlying factory implementation.provider - The provider.algorithm - The algorithm name.| Method Detail |
|---|
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.
InvalidKeySpecExceptionpublic 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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