KeyPair and KeyPairGenerator Classes

This section describes the KeyPair and KeyPairGenerator Classes. The KeyPairGenerator.generateKeyPair() can be used to generate a private and public key pair.

java.security.KeyPair is a final class representing a key pair (a public key and a private key). Major methods in the KeyPair class:

getPrivate() - Returns a PriviateKey object representing the private key in the key pair.

getPublic() - Returns a PublicKey object representing the public key in the key pair.

java.security.KeyPairGenerator is an abstract class providing a link to implementation classes of private and public key pair generation algorithms provided by various security package providers. Major methods in the KeyPairGenerator class:

getInstance() - Returns a KeyPairGenerator object of the specified algorithm from the implementation of the specified provider. If provider is not specified, the default implementation is used. This is a static method.

initialize() - Initializes the key pair generator with the specified key size.

generateKeyPair() - Generates a key pair and returns a KeyPair object.

getAlgorithm() - Returns the algorithm name of the current key pair generator object.

getProvider() - Returns the provider as a provider object of the current key pair generator object.

See the next section for a sample program on how to use the java.security.KeyPairGenerator class.

Last update: 2014.

Table of Contents

 About This JDK Tutorial Book

 Downloading and Installing JDK 1.8.0 on Windows

 Downloading and Installing JDK 1.7.0 on Windows

 Downloading and Installing JDK 1.6.2 on Windows

 Java Date-Time API

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 DOM (Document Object Model) - API for XML Files

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 DTD (Document Type Definition) - XML Validation

 XSD (XML Schema Definition) - XML Validation

 XSL (Extensible Stylesheet Language)

 Message Digest Algorithm Implementations in JDK

Private key and Public Key Pair Generation

 Private and Public Keys and Related Interfaces

KeyPair and KeyPairGenerator Classes

 Key Pair Sample Program - JcaKeyPair.java

 DSA Private Key and Public Key Pair Sample

 RSA Private Key and Public Key Pair Sample

 DiffieHellman Private Key and Public Key Pair Sample

 PKCS#8/X.509 Private/Public Encoding Standards

 Digital Signature Algorithm and Sample Program

 "keytool" Commands and "keystore" Files

 KeyStore and Certificate Classes

 Secret Key Generation and Management

 Cipher - Secret Key Encryption and Decryption

 The SSL (Secure Socket Layer) Protocol

 SSL Socket Communication Testing Programs

 SSL Client Authentication

 HTTPS (Hypertext Transfer Protocol Secure)

 Outdated Tutorials

 References

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