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java.security
Class KeyStoreSpi

java.lang.Object
  |
  +--java.security.KeyStoreSpi

public abstract class KeyStoreSpi

extends Object

This class defines the Service Provider Interface (SPI) for the KeyStore class. All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a keystore for a particular keystore type.

Since:

1.2

See Also:

KeyStore

Constructor Summary

KeyStoreSpi()

Method Summary

abstract Enumeration	engineAliases() Lists all the alias names of this keystore.
abstract boolean	engineContainsAlias(String alias) Checks if the given alias exists in this keystore.
abstract void	engineDeleteEntry(String alias) Deletes the entry identified by the given alias from this keystore.
abstract Certificate	engineGetCertificate(String alias) Returns the certificate associated with the given alias.
abstract String	engineGetCertificateAlias(Certificate cert) Returns the (alias) name of the first keystore entry whose certificate matches the given certificate.
abstract Certificate[]	engineGetCertificateChain(String alias) Returns the certificate chain associated with the given alias.
abstract Date	engineGetCreationDate(String alias) Returns the creation date of the entry identified by the given alias.
abstract Key	engineGetKey(String alias, char[] password) Returns the key associated with the given alias, using the given password to recover it.
abstract boolean	engineIsCertificateEntry(String alias) Returns true if the entry identified by the given alias is a trusted certificate entry, and false otherwise.
abstract boolean	engineIsKeyEntry(String alias) Returns true if the entry identified by the given alias is a key entry, and false otherwise.
abstract void	engineLoad(InputStream stream, char[] password) Loads the keystore from the given input stream.
abstract void	engineSetCertificateEntry(String alias, Certificate cert) Assigns the given certificate to the given alias.
abstract void	engineSetKeyEntry(String alias, byte[] key, Certificate[] chain) Assigns the given key (that has already been protected) to the given alias.
abstract void	engineSetKeyEntry(String alias, Key key, char[] password, Certificate[] chain) Assigns the given key to the given alias, protecting it with the given password.
abstract int	engineSize() Retrieves the number of entries in this keystore.
abstract void	engineStore(OutputStream stream, char[] password) Stores this keystore to the given output stream, and protects its integrity with the given password.

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyStoreSpi

public KeyStoreSpi()

Method Detail

engineGetKey

public abstract Key engineGetKey(String alias,
                                 char[] password)
                          throws NoSuchAlgorithmException,
                                 UnrecoverableKeyException

Returns the key associated with the given alias, using the given password to recover it.

Parameters:

alias - the alias name

password - the password for recovering the key

Returns:

the requested key, or null if the given alias does not exist or does not identify a key entry.

Throws:

NoSuchAlgorithmException - if the algorithm for recovering the key cannot be found

UnrecoverableKeyException - if the key cannot be recovered (e.g., the given password is wrong).

engineGetCertificateChain

public abstract Certificate[] engineGetCertificateChain(String alias)

Returns the certificate chain associated with the given alias.

Parameters:

alias - the alias name

Returns:

the certificate chain (ordered with the user's certificate first and the root certificate authority last), or null if the given alias does not exist or does not contain a certificate chain (i.e., the given alias identifies either a trusted certificate entry or a key entry without a certificate chain).

engineGetCertificate

public abstract Certificate engineGetCertificate(String alias)

Returns the certificate associated with the given alias.

If the given alias name identifies a trusted certificate entry, the certificate associated with that entry is returned. If the given alias name identifies a key entry, the first element of the certificate chain of that entry is returned, or null if that entry does not have a certificate chain.

Parameters:

alias - the alias name

Returns:

the certificate, or null if the given alias does not exist or does not contain a certificate.

engineGetCreationDate

public abstract Date engineGetCreationDate(String alias)

Returns the creation date of the entry identified by the given alias.

Parameters:

alias - the alias name

Returns:

the creation date of this entry, or null if the given alias does not exist

engineSetKeyEntry

public abstract void engineSetKeyEntry(String alias,
                                       Key key,
                                       char[] password,
                                       Certificate[] chain)
                                throws KeyStoreException

Assigns the given key to the given alias, protecting it with the given password.

If the given key is of type java.security.PrivateKey, it must be accompanied by a certificate chain certifying the corresponding public key.

If the given alias already exists, the keystore information associated with it is overridden by the given key (and possibly certificate chain).

Parameters:

alias - the alias name

key - the key to be associated with the alias

password - the password to protect the key

chain - the certificate chain for the corresponding public key (only required if the given key is of type java.security.PrivateKey).

Throws:

KeyStoreException - if the given key cannot be protected, or this operation fails for some other reason

engineSetKeyEntry

public abstract void engineSetKeyEntry(String alias,
                                       byte[] key,
                                       Certificate[] chain)
                                throws KeyStoreException

Assigns the given key (that has already been protected) to the given alias.

If the protected key is of type java.security.PrivateKey, it must be accompanied by a certificate chain certifying the corresponding public key.

If the given alias already exists, the keystore information associated with it is overridden by the given key (and possibly certificate chain).

Parameters:

alias - the alias name

key - the key (in protected format) to be associated with the alias

chain - the certificate chain for the corresponding public key (only useful if the protected key is of type java.security.PrivateKey).

Throws:

KeyStoreException - if this operation fails.

engineSetCertificateEntry

public abstract void engineSetCertificateEntry(String alias,
                                               Certificate cert)
                                        throws KeyStoreException

Assigns the given certificate to the given alias.

If the given alias already exists in this keystore and identifies a trusted certificate entry, the certificate associated with it is overridden by the given certificate.

Parameters:

alias - the alias name

cert - the certificate

Throws:

KeyStoreException - if the given alias already exists and does not identify a trusted certificate entry, or this operation fails for some other reason.

engineDeleteEntry

public abstract void engineDeleteEntry(String alias)
                                throws KeyStoreException

Deletes the entry identified by the given alias from this keystore.

Parameters:

alias - the alias name

Throws:

KeyStoreException - if the entry cannot be removed.

engineAliases

public abstract Enumeration engineAliases()

Lists all the alias names of this keystore.

Returns:

enumeration of the alias names

engineContainsAlias

public abstract boolean engineContainsAlias(String alias)

Checks if the given alias exists in this keystore.

Parameters:

alias - the alias name

Returns:

true if the alias exists, false otherwise

engineSize

public abstract int engineSize()

Retrieves the number of entries in this keystore.

Returns:

the number of entries in this keystore

engineIsKeyEntry

public abstract boolean engineIsKeyEntry(String alias)

Returns true if the entry identified by the given alias is a key entry, and false otherwise.

Parameters:

alias - the alias for the keystore entry to be checked

Returns:

true if the entry identified by the given alias is a key entry, false otherwise.

engineIsCertificateEntry

public abstract boolean engineIsCertificateEntry(String alias)

Returns true if the entry identified by the given alias is a trusted certificate entry, and false otherwise.

Parameters:

alias - the alias for the keystore entry to be checked

Returns:

true if the entry identified by the given alias is a trusted certificate entry, false otherwise.

engineGetCertificateAlias

public abstract String engineGetCertificateAlias(Certificate cert)

Returns the (alias) name of the first keystore entry whose certificate matches the given certificate.

This method attempts to match the given certificate with each keystore entry. If the entry being considered is a trusted certificate entry, the given certificate is compared to that entry's certificate. If the entry being considered is a key entry, the given certificate is compared to the first element of that entry's certificate chain (if a chain exists).

Parameters:

cert - the certificate to match with.

Returns:

the (alias) name of the first entry with matching certificate, or null if no such entry exists in this keystore.

engineStore

public abstract void engineStore(OutputStream stream,
                                 char[] password)
                          throws IOException,
                                 NoSuchAlgorithmException,
                                 CertificateException

Stores this keystore to the given output stream, and protects its integrity with the given password.

Parameters:

stream - the output stream to which this keystore is written.

password - the password to generate the keystore integrity check

Throws:

IOException - if there was an I/O problem with data

NoSuchAlgorithmException - if the appropriate data integrity algorithm could not be found

CertificateException - if any of the certificates included in the keystore data could not be stored

engineLoad

public abstract void engineLoad(InputStream stream,
                                char[] password)
                         throws IOException,
                                NoSuchAlgorithmException,
                                CertificateException

Loads the keystore from the given input stream.

If a password is given, it is used to check the integrity of the keystore data. Otherwise, the integrity of the keystore is not checked.

Parameters:

stream - the input stream from which the keystore is loaded

password - the (optional) password used to check the integrity of the keystore.

Throws:

IOException - if there is an I/O or format problem with the keystore data

NoSuchAlgorithmException - if the algorithm used to check the integrity of the keystore cannot be found

CertificateException - if any of the certificates in the keystore could not be loaded