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.

KeyStoreSpi

public KeyStoreSpi()

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

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.

engineEntryInstanceOf

public boolean engineEntryInstanceOf(String alias,
                                     Class entryClass)

Determines if the keystore Entry for the specified alias is an instance or subclass of the specified entryClass.

Parameters:

alias - the alias name

entryClass - the entry class

Returns:

true if the keystore Entry for the specified alias is an instance or subclass of the specified entryClass, false otherwise

engineGetCertificate

public abstract Certificate engineGetCertificate(String alias)

Returns the certificate associated with the given alias.

If the given alias name identifies an entry created by a call to setCertificateEntry, or created by a call to setEntry with a TrustedCertificateEntry, then the trusted certificate contained in that entry is returned.

If the given alias name identifies an entry created by a call to setKeyEntry, or created by a call to setEntry with a PrivateKeyEntry, then the first element of the certificate chain in that entry (if a chain exists) is returned.

Parameters:

alias - the alias name

Returns:

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

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 was created by a call to setCertificateEntry, or created by a call to setEntry with a TrustedCertificateEntry, then the given certificate is compared to that entry's certificate.

If the entry being considered was created by a call to setKeyEntry, or created by a call to setEntry with a PrivateKeyEntry, then the given certificate is compared to the first element of that entry's certificate chain.

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.

engineGetCertificateChain

public abstract Certificate[] engineGetCertificateChain(String alias)

Returns the certificate chain associated with the given alias. The certificate chain must have been associated with the alias by a call to setKeyEntry, or by a call to setEntry with a PrivateKeyEntry.

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

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

engineGetEntry

public KeyStore.Entry engineGetEntry(String alias,
                                     KeyStore.ProtectionParameter protParam)
                              throws KeyStoreException,
                                     NoSuchAlgorithmException,
                                     UnrecoverableEntryException

Gets a KeyStore.Entry for the specified alias with the specified protection parameter.

Parameters:

alias - get the KeyStore.Entry for this alias

protParam - the ProtectionParameter used to protect the Entry, which may be null

Returns:

the KeyStore.Entry for the specified alias, or null if there is no such entry

Throws:

KeyStoreException - if the operation failed

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

UnrecoverableEntryException - if the specified protParam were insufficient or invalid

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. The key must have been associated with the alias by a call to setKeyEntry, or by a call to setEntry with a PrivateKeyEntry or SecretKeyEntry.

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-related 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).

engineIsCertificateEntry

public abstract boolean engineIsCertificateEntry(String alias)

Returns true if the entry identified by the given alias was created by a call to setCertificateEntry, or created by a call to setEntry with a TrustedCertificateEntry.

Parameters:

alias - the alias for the keystore entry to be checked

Returns:

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

engineIsKeyEntry

public abstract boolean engineIsKeyEntry(String alias)

Returns true if the entry identified by the given alias was created by a call to setKeyEntry, or created by a call to setEntry with a PrivateKeyEntry or a SecretKeyEntry.

Parameters:

alias - the alias for the keystore entry to be checked

Returns:

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

engineLoad

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

Loads the keystore from the given input stream.

A password may be given to unlock the keystore (e.g. the keystore resides on a hardware token device), or to check the integrity of the keystore data. If a password is not given for integrity checking, then integrity checking is not performed.

Parameters:

stream - the input stream from which the keystore is loaded, or null

password - the password used to check the integrity of the keystore, the password used to unlock the keystore, or null

Throws:

IOException - if there is an I/O or format problem with the keystore data, if a password is required but not given, or if the given password was incorrect. If the error is due to a wrong password, the {@link Throwable#getCause cause} of the IOException should be an UnrecoverableKeyException

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

engineLoad

public void engineLoad(KeyStore.LoadStoreParameter param)
                throws IOException,
                       NoSuchAlgorithmException,
                       CertificateException

Loads the keystore using the given KeyStore.LoadStoreParameter.

Note that if this KeyStore has already been loaded, it is reinitialized and loaded again from the given parameter.

Parameters:

param - the KeyStore.LoadStoreParameter that specifies how to load the keystore, which may be null

Throws:

IOException - if there is an I/O or format problem with the keystore data. If the error is due to an incorrect ProtectionParameter (e.g. wrong password) the {@link Throwable#getCause cause} of the IOException should be an UnrecoverableKeyException

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

engineSetCertificateEntry

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

Assigns the given certificate to the given alias.

If the given alias identifies an existing entry created by a call to setCertificateEntry, or created by a call to setEntry with a TrustedCertificateEntry, the trusted certificate in the existing entry 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 an entry containing a trusted certificate, or this operation fails for some other reason.

engineSetEntry

public void engineSetEntry(String alias,
                           KeyStore.Entry entry,
                           KeyStore.ProtectionParameter protParam)
                    throws KeyStoreException

Saves a KeyStore.Entry under the specified alias. The specified protection parameter is used to protect the Entry.

If an entry already exists for the specified alias, it is overridden.

Parameters:

alias - save the KeyStore.Entry under this alias

entry - the Entry to save

protParam - the ProtectionParameter used to protect the Entry, which may be null

Throws:

KeyStoreException - if this operation fails

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.

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

engineSize

public abstract int engineSize()

Retrieves the number of entries in this keystore.

Returns:

the number of entries in this keystore

engineStore

public void engineStore(KeyStore.LoadStoreParameter param)
                 throws IOException,
                        NoSuchAlgorithmException,
                        CertificateException

Stores this keystore using the given KeyStore.LoadStoreParmeter.

Parameters:

param - the KeyStore.LoadStoreParmeter that specifies how to store the keystore, which may be null

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

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