Top Description Constructors Methods
java.security

public abstract Class KeyStoreSpi

extends Object
Class Inheritance
Known Direct Subclasses
com.sun.crypto.provider.JceKeyStore, sun.security.provider.DomainKeyStore, sun.security.provider.JavaKeyStore, sun.security.util.KeyStoreDelegator, sun.security.pkcs12.PKCS12KeyStore
Imports
java.io.*, java.util.*, java.security.KeyStore.*, java.security.cert.Certificate, .CertificateException, javax.crypto.SecretKey, javax.security.auth.callback.*

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.
Author
Jan Luehe
Since
1.2
See Also
KeyStore

Constructor Summary

AccessConstructor and Description
public
KeyStoreSpi()

Constructor for subclasses to call.

Method Summary

Modifier and TypeMethod and Description
public abstract Enumeration<String>

Returns:

enumeration of the alias names
engineAliases
()

Lists all the alias names of this keystore.

public abstract boolean

Returns:

true if the alias exists, false otherwise
engineContainsAlias
(String
the alias name
alias
)

Checks if the given alias exists in this keystore.

public abstract void
engineDeleteEntry(String
the alias name
alias
)

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

public boolean

Returns:

true if the keystore Entry for the specified alias is an instance or subclass of the specified entryClass, false otherwise
engineEntryInstanceOf
(String
the alias name
alias
,
Class<? extends KeyStore.Entry>
the entry class
entryClass
)

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

public Set<KeyStore.Entry.Attribute>

Returns:

an unmodifiable Set of attributes. This set is empty if the given alias does not exist or there are no attributes associated with the alias. This set may also be empty for PrivateKeyEntry or SecretKeyEntry entries that contain protected attributes. These protected attributes should be populated into the result returned by engineGetEntry and can be retrieved by calling the Entry#getAttributes method.
engineGetAttributes
(String
the alias name
alias
)

Retrieves the attributes associated with the given alias.

public abstract Certificate

Returns:

the certificate, or null if the given alias does not exist or does not contain a certificate.
engineGetCertificate
(String
the alias name
alias
)

Returns the certificate associated with the given alias.

public abstract String

Returns:

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

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

public abstract Certificate[]

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
engineGetCertificateChain
(String
the alias name
alias
)

Returns the certificate chain associated with the given alias.

public abstract Date

Returns:

the creation date of this entry, or null if the given alias does not exist
engineGetCreationDate
(String
the alias name
alias
)

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

public KeyStore.Entry

Returns:

the KeyStore.Entry for the specified alias, or null if there is no such entry
engineGetEntry
(String
get the KeyStore.Entry for this alias
alias
,
KeyStore.ProtectionParameter
the ProtectionParameter used to protect the Entry, which may be null
protParam
)

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

public abstract Key

Returns:

the requested key, or null if the given alias does not exist or does not identify a key-related entry.
engineGetKey
(String
the alias name
alias
,
char[]
the password for recovering the key
password
)

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

public abstract boolean

Returns:

true if the entry identified by the given alias contains a trusted certificate, false otherwise.
engineIsCertificateEntry
(String
the alias for the keystore entry to be checked
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.

public abstract boolean

Returns:

true if the entry identified by the given alias is a key-related, false otherwise.
engineIsKeyEntry
(String
the alias for the keystore entry to be checked
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.

public abstract void
engineLoad(InputStream
the input stream from which the keystore is loaded, or null
stream
,
char[]
the password used to check the integrity of the keystore, the password used to unlock the keystore, or null
password
)

Loads the keystore from the given input stream.

public void
engineLoad(KeyStore.LoadStoreParameter
the KeyStore.LoadStoreParameter that specifies how to load the keystore, which may be null
param
)

Loads the keystore using the given KeyStore.LoadStoreParameter.

pack-priv void
public boolean

Returns:

true if the keystore data is supported, otherwise false
engineProbe
(InputStream
the keystore data to be probed
stream
)

Probes the specified input stream to determine whether it contains a keystore that is supported by this implementation, or not.

public abstract void
engineSetCertificateEntry(String
the alias name
alias
,
Certificate
the certificate
cert
)

Assigns the given certificate to the given alias.

public void
engineSetEntry(String
save the KeyStore.Entry under this alias
alias
,
KeyStore.Entry
the Entry to save
entry
,
KeyStore.ProtectionParameter
the ProtectionParameter used to protect the Entry, which may be null
protParam
)

Saves a KeyStore.Entry under the specified alias.

public abstract void
engineSetKeyEntry(String
the alias name
alias
,
Key
the key to be associated with the alias
key
,
char[]
the password to protect the key
password
,
Certificate[]
the certificate chain for the corresponding public key (only required if the given key is of type java.security.PrivateKey).
chain
)

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

public abstract void
engineSetKeyEntry(String
the alias name
alias
,
byte[]
the key (in protected format) to be associated with the alias
key
,
Certificate[]
the certificate chain for the corresponding public key (only useful if the protected key is of type java.security.PrivateKey).
chain
)

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

public abstract int

Returns:

the number of entries in this keystore
engineSize
()

Retrieves the number of entries in this keystore.

public abstract void
engineStore(OutputStream
the output stream to which this keystore is written.
stream
,
char[]
the password to generate the keystore integrity check. May be null if the keystore does not support or require an integrity check.
password
)

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

public void
engineStore(KeyStore.LoadStoreParameter
the KeyStore.LoadStoreParameter that specifies how to store the keystore, which may be null
param
)

Stores this keystore using the given KeyStore.LoadStoreParameter.

Inherited from java.lang.Object:
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Constructor Detail

KeyStoreSpiback to summary
public KeyStoreSpi()

Constructor for subclasses to call.

Method Detail

engineAliasesback to summary
public abstract Enumeration<String> engineAliases()

Lists all the alias names of this keystore.

Returns:Enumeration<String>

enumeration of the alias names

engineContainsAliasback to summary
public abstract boolean engineContainsAlias(String alias)

Checks if the given alias exists in this keystore.

Parameters
alias:String

the alias name

Returns:boolean

true if the alias exists, false otherwise

engineDeleteEntryback to summary
public abstract void engineDeleteEntry(String alias) throws KeyStoreException

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

Parameters
alias:String

the alias name

Exceptions
KeyStoreException:
if the entry cannot be removed.
engineEntryInstanceOfback to summary
public boolean engineEntryInstanceOf(String alias, Class<? extends KeyStore.Entry> entryClass)

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

Parameters
alias:String

the alias name

entryClass:Class<? extends KeyStore.Entry>

the entry class

Returns:boolean

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

Since
1.5
engineGetAttributesback to summary
public Set<KeyStore.Entry.Attribute> engineGetAttributes(String alias)

Retrieves the attributes associated with the given alias.

Implementation Specification

The default implementation returns an empty Set. KeyStoreSpi implementations that support attributes should override this method.

Parameters
alias:String

the alias name

Returns:Set<KeyStore.Entry.Attribute>

an unmodifiable Set of attributes. This set is empty if the given alias does not exist or there are no attributes associated with the alias. This set may also be empty for PrivateKeyEntry or SecretKeyEntry entries that contain protected attributes. These protected attributes should be populated into the result returned by engineGetEntry and can be retrieved by calling the Entry#getAttributes method.

Since
18
engineGetCertificateback to summary
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:String

the alias name

Returns:Certificate

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

engineGetCertificateAliasback to summary
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:Certificate

the certificate to match with.

Returns:String

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

engineGetCertificateChainback to summary
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:String

the alias name

Returns:Certificate[]

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

engineGetCreationDateback to summary
public abstract Date engineGetCreationDate(String alias)

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

Parameters
alias:String

the alias name

Returns:Date

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

engineGetEntryback to summary
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:String

get the KeyStore.Entry for this alias

protParam:KeyStore.ProtectionParameter

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

Returns:KeyStore.Entry

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

Exceptions
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
UnrecoverableKeyException:
if the entry is a PrivateKeyEntry or SecretKeyEntry and the specified protParam does not contain the information needed to recover the key (e.g. wrong password)
Since
1.5
engineGetKeyback to summary
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:String

the alias name

password:char[]

the password for recovering the key

Returns:Key

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

Exceptions
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).
engineIsCertificateEntryback to summary
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:String

the alias for the keystore entry to be checked

Returns:boolean

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

engineIsKeyEntryback to summary
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:String

the alias for the keystore entry to be checked

Returns:boolean

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

engineLoadback to summary
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:InputStream

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

password:char[]

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

Exceptions
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 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
engineLoadback to summary
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.

Implementation Specification

The default implementation examines KeyStore.LoadStoreParameter to extract its password and pass it to KeyStoreSpi#engineLoad(InputStream, char[]) along with a null InputStream.

If KeyStore.LoadStoreParameter is null then the password parameter will also be null. Otherwise, the KeyStore.ProtectionParameter of KeyStore.LoadStoreParameter must be either a KeyStore.PasswordProtection or a KeyStore.CallbackHandlerProtection that supports PasswordCallback so that the password parameter can be extracted. If the KeyStore.ProtectionParameter is neither of those classes then a NoSuchAlgorithmException is thrown.

Parameters
param:KeyStore.LoadStoreParameter

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

Exceptions
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 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
IllegalArgumentException:
if the given KeyStore.LoadStoreParameter input is not recognized
Since
1.5
engineLoadback to summary
pack-priv void engineLoad(InputStream stream, KeyStore.LoadStoreParameter param) throws IOException, NoSuchAlgorithmException, CertificateException
engineProbeback to summary
public boolean engineProbe(InputStream stream) throws IOException

Probes the specified input stream to determine whether it contains a keystore that is supported by this implementation, or not.

Implementation Specification

This method returns false by default. Keystore implementations should override this method to peek at the data stream directly or to use other content detection mechanisms.

Parameters
stream:InputStream

the keystore data to be probed

Returns:boolean

true if the keystore data is supported, otherwise false

Exceptions
IOException:
if there is an I/O problem with the keystore data.
NullPointerException:
if stream is null.
Since
9
engineSetCertificateEntryback to summary
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:String

the alias name

cert:Certificate

the certificate

Exceptions
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.
engineSetEntryback to summary
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:String

save the KeyStore.Entry under this alias

entry:KeyStore.Entry

the Entry to save

protParam:KeyStore.ProtectionParameter

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

Exceptions
KeyStoreException:
if this operation fails
Since
1.5
engineSetKeyEntryback to summary
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:String

the alias name

key:Key

the key to be associated with the alias

password:char[]

the password to protect the key

chain:Certificate[]

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

Exceptions
KeyStoreException:
if the given key cannot be protected, or this operation fails for some other reason
engineSetKeyEntryback to summary
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:String

the alias name

key:byte[]

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

chain:Certificate[]

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

Exceptions
KeyStoreException:
if this operation fails.
engineSizeback to summary
public abstract int engineSize()

Retrieves the number of entries in this keystore.

Returns:int

the number of entries in this keystore

engineStoreback to summary
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:OutputStream

the output stream to which this keystore is written.

password:char[]

the password to generate the keystore integrity check. May be null if the keystore does not support or require an integrity check.

Exceptions
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
engineStoreback to summary
public void engineStore(KeyStore.LoadStoreParameter param) throws IOException, NoSuchAlgorithmException, CertificateException

Stores this keystore using the given KeyStore.LoadStoreParameter.

Implementation Specification

The default implementation throws an UnsupportedOperationException.

Parameters
param:KeyStore.LoadStoreParameter

the KeyStore.LoadStoreParameter that specifies how to store the keystore, which may be null

Exceptions
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
IllegalArgumentException:
if the given KeyStore.LoadStoreParameter input is not recognized
UnsupportedOperationException:
if the implementation does not support this operation
Since
1.5