Module java.base
Package 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:

  • Constructor Details

    • KeyStoreSpi

      public KeyStoreSpi()
      Constructor for subclasses to call.

  • Method Details

    • 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).

    • 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

    • 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.

    • 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 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.

    • 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<String> 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 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.

    • 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.

    • 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.

    • 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. May be null if the keystore does not support or require an 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

    • engineStore

      public void engineStore(KeyStore.LoadStoreParameter param) throws IOException, NoSuchAlgorithmException, CertificateException
      Stores this keystore using the given KeyStore.LoadStoreParameter.
      Implementation Requirements:
      The default implementation throws an UnsupportedOperationException.
      Parameters:
      param - the KeyStore.LoadStoreParameter that specifies how to store the keystore, which may be null
      Throws:
      IllegalArgumentException - if the given KeyStore.LoadStoreParameter input is not recognized
      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
      UnsupportedOperationException - if the implementation does not support this operation
      Since:
      1.5

    • 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 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.

      Implementation Requirements:
      The default implementation examines KeyStore.LoadStoreParameter to extract its password and pass it to 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 - the KeyStore.LoadStoreParameter that specifies how to load the keystore, which may be null
      Throws:
      IllegalArgumentException - if the given KeyStore.LoadStoreParameter input is not recognized
      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
      Since:
      1.5

    • engineGetAttributes

      public Set<KeyStore.Entry.Attribute> engineGetAttributes(String alias)
      Retrieves the attributes associated with the given alias.
      Implementation Requirements:
      The default implementation returns an empty Set. KeyStoreSpi implementations that support attributes should override this method.
      Parameters:
      alias - the alias name
      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(java.lang.String, java.security.KeyStore.ProtectionParameter) and can be retrieved by calling the KeyStore.Entry.getAttributes() method.
      Since:
      18

    • 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
      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

    • 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
      Since:
      1.5

    • engineEntryInstanceOf

      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 - 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
      Since:
      1.5

    • engineProbe

      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 Requirements:
      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 - the keystore data to be probed
      Returns:
      true if the keystore data is supported, otherwise false
      Throws:
      IOException - if there is an I/O problem with the keystore data.
      NullPointerException - if stream is null.
      Since:
      9