javax.crypto

Class SecretKeyFactorySpi

Contents

  • public abstract class SecretKeyFactorySpi
extends Object
    This class defines the Service Provider Interface (SPI) for the SecretKeyFactory class. All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a secret-key factory for a particular algorithm.

    A provider should document all the key specifications supported by its secret key factory. For example, the DES secret-key factory supplied by the "SunJCE" provider supports DESKeySpec as a transparent representation of DES keys, and that provider's secret-key factory for Triple DES keys supports DESedeKeySpec as a transparent representation of Triple DES keys.

    Since:
    1.4
    See Also:
    SecretKey, DESKeySpec, DESedeKeySpec

    • Constructor Detail

      • SecretKeyFactorySpi

        public SecretKeyFactorySpi()

    • Method Detail

      • engineGenerateSecret

        protected abstract SecretKey engineGenerateSecret(KeySpec keySpec)
                                           throws InvalidKeySpecException
        Generates a SecretKey object from the provided key specification (key material).
        Parameters:
        keySpec - the specification (key material) of the secret key
        Returns:
        the secret key
        Throws:
        InvalidKeySpecException - if the given key specification is inappropriate for this secret-key factory to produce a secret key.

      • engineGetKeySpec

        protected abstract KeySpec engineGetKeySpec(SecretKey key,
                       Class keySpec)
                                     throws InvalidKeySpecException
        Returns a specification (key material) of the given key object in the requested format.
        Parameters:
        key - the key
        keySpec - the requested format in which the key material shall be returned
        Returns:
        the underlying key specification (key material) in the requested format
        Throws:
        InvalidKeySpecException - if the requested key specification is inappropriate for the given key (e.g., the algorithms associated with key and keySpec do not match, or key references a key on a cryptographic hardware device whereas keySpec is the specification of a software-based key), or the given key cannot be dealt with (e.g., the given key has an algorithm or format not supported by this secret-key factory).

      • engineTranslateKey

        protected abstract SecretKey engineTranslateKey(SecretKey key)
                                         throws InvalidKeyException
        Translates a key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this secret-key factory.
        Parameters:
        key - the key whose provider is unknown or untrusted
        Returns:
        the translated key
        Throws:
        InvalidKeyException - if the given key cannot be processed by this secret-key factory.

Document created the 11/06/2005, last modified the 04/03/2020
Source of the printed document:https://www.gaudry.be/en/java-api-rf-javax/crypto/secretkeyfactoryspi.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

  1. View the html document Language of the document:fr Manuel PHP : https://docs.oracle.com

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut