DES Java Implementation in JDK by Sun
This section describes how DES algorithm is implemented in JDK. DES algorithm is implemented as part of the JCE package which is integrated in the JDK since version 1.4.
DES algorithm has been implemented in Java by Sun as part of the JDK JCE (Java Cryptography Extension) package.
JCE was previously an optional package (extension) to the Java 2 SDK, Standard Edition,
versions 1.2.x and 1.3.x. JCE has now been integrated into the Java 2 SDK, version 1.4.x, and new versions.
Sun's implementation of DES includes the following features:
- Offers both DES and Triple DES algorithms.
- Offers Electronic Code Book (ECB), Cipher Block Chaining (CBC), Cipher Feedback (CFB),
Output Feedback (OFB), and Propagating Cipher Block Chaining (PCBC) modes.
- Offers PKCS5 padding options
The following JCE classes and interfaces are involved to support DES encryption and decryption:
- javax.crypto.spec.DESKeySpec - This class specifies a DES encryption and decryption key material.
- javax.crypto.spec.DESedeKeySpec - This class specifies a DES-EDE ("triple-DES") encryption and decryption key material.
- javax.crypto.SecretKeyFactory - This class represents a factory for secret keys.
SecretKeyFactory allows you to build an opaque secret key object from a given key specification
(key material), like a DESKeySpec object.
It also allows you to retrieve the underlying key material of an opaque secret key object.
- javax.crypto.Cipher - This class provides the functionality of a cryptographic cipher
for encryption and decryption.
In order to create a Cipher object, the application calls the Cipher's getInstance() method,
and passes the name of the requested transformation of a specific cryptographic algorithm (e.g. DES) to it.
Table of Contents
About This Book
Cryptography Basic Concepts
Introduction to AES (Advanced Encryption Standard)
Introduction to DES Algorithm
DES Algorithm - Illustrated with Java Programs
DES Algorithm Java Implementation
►DES Algorithm - Java Implementation in JDK JCE
►DES Java Implementation in JDK by Sun
Steps of Using DES Algorithm in JDK JCE
Testing DES Algorithm in JDK JCE
What Is PKCS5Padding?
JceSunDesPaddingTest.java - JCE DES Padding Test
DES Encryption Operation Modes
DES in Stream Cipher Modes
PHP Implementation of DES - mcrypt
Blowfish - 8-Byte Block Cipher
Secret Key Generation and Management
Cipher - Secret Key Encryption and Decryption
Introduction of RSA Algorithm
RSA Implementation using java.math.BigInteger Class
Introduction of DSA (Digital Signature Algorithm)
Java Default Implementation of DSA
Private key and Public Key Pair Generation
PKCS#8/X.509 Private/Public Encoding Standards
Cipher - Public Key Encryption and Decryption
MD5 Mesasge Digest Algorithm
SHA1 Mesasge Digest Algorithm
OpenSSL Introduction and Installation
OpenSSL Generating and Managing RSA Keys
OpenSSL Managing Certificates
OpenSSL Generating and Signing CSR
OpenSSL Validating Certificate Path
"keytool" and "keystore" from JDK
"OpenSSL" Signing CSR Generated by "keytool"
Migrating Keys from "keystore" to "OpenSSL" Key Files
Certificate X.509 Standard and DER/PEM Formats
Migrating Keys from "OpenSSL" Key Files to "keystore"
Using Certificates in IE
Using Certificates in Google Chrome
Using Certificates in Firefox
Full Version in PDF/EPUB