edu.sdsc.inca
Class Component

java.lang.Object
  edu.sdsc.inca.Component

Direct Known Subclasses:

Client, Server

public class Component

extends java.lang.Object

This class encapsulates the common behavior of the Client and Server classes.

Field Summary

protected boolean	authenticate
protected java.security.cert.Certificate	cert
protected java.lang.String	certPath
static java.lang.String	COMPONENT_OPTS
protected java.security.KeyPair	key
protected java.lang.String	keyPath
protected java.lang.String	logFile
protected static org.apache.log4j.Logger	logger
protected java.lang.String	password
protected java.util.Vector	trusted
protected java.lang.String	trustedPath

Constructor Summary

Component()

Method Summary

void	addTrustedCert(java.security.cert.Certificate trusted) Add a single trusted certificate.
static void	configComponent(Component c, java.lang.String[] args, java.lang.String opts, java.lang.String prefix, java.lang.String exec, java.lang.String versionFilename) A convenience function for configuring a Component (or descendent class) from the system properties, the arguments passed to main, and the properties file.
protected java.lang.Object	createSocket(boolean serverSocket, java.lang.String host, int port) Creates and returns a socket with any appropriate authentication.
boolean	getAuthenticate() Is the connection authenticated?
java.security.cert.Certificate	getCertificate() Returns the component certificate.
java.lang.String	getCertificatePath() Returns the path to the component certificate.
java.security.KeyPair	getKey() Returns the component key.
java.lang.String	getKeyPath() Returns the path to the component private key.
java.lang.String	getLogFile() Returns the path to the file where the component writes log messages.
java.lang.String	getPassword() Gets the component encryption password.
java.security.cert.Certificate[]	getTrustedCertificates() Returns the set of certificates trusted by the component.
java.lang.String	getTrustedPath() Get the path to the component trusted certificate directory.
static java.io.InputStream	openResourceStream(java.lang.String resourcePath) Returns an input stream for a resource found either in the classpath or on the file system.
void	readCredentials() Read in the credentials using the paths to the credentials and passphrase.
static java.lang.String	readVersion(java.lang.String versionFilename) Read the version for the component from a file in the classpath.
void	setAuthenticate(boolean authenticate) Determines whether or not the connection is authenticated.
void	setCertificatePath(java.lang.String path) Sets the path to the file that contains the component certificate.
void	setConfiguration(java.util.Properties config) A convenience function for setting multiple Component configuration properties at once.
void	setKeyPath(java.lang.String path) Sets the path to the file that contains the component private key.
void	setLogFile(java.lang.String path) Sets the path to the file where the component writes log messages.
void	setPassword(java.lang.String password) Sets the component encryption password.
void	setTrustedPath(java.lang.String path) Set the trusted certificates to the contents of the directory given.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COMPONENT_OPTS

public static final java.lang.String COMPONENT_OPTS

See Also:

Constant Field Values

logger

protected static final org.apache.log4j.Logger logger

authenticate

protected boolean authenticate

certPath

protected java.lang.String certPath

keyPath

protected java.lang.String keyPath

logFile

protected java.lang.String logFile

password

protected java.lang.String password

trustedPath

protected java.lang.String trustedPath

cert

protected java.security.cert.Certificate cert

key

protected java.security.KeyPair key

trusted

protected java.util.Vector trusted

Constructor Detail

Component

public Component()

Method Detail

addTrustedCert

public void addTrustedCert(java.security.cert.Certificate trusted)

Add a single trusted certificate.

Parameters:

trusted - the certificate to add

getAuthenticate

public boolean getAuthenticate()

Is the connection authenticated?

Returns:

whether or not the connection is authenticated

getCertificate

public java.security.cert.Certificate getCertificate()

Returns the component certificate. Valid only after the component's socket has been created.

Returns:

the component certificate

getCertificatePath

public java.lang.String getCertificatePath()

Returns the path to the component certificate.

Returns:

The path to the certificate.

getKey

public java.security.KeyPair getKey()

Returns the component key. Valid only after the component's socket has been created.

Returns:

the component key

getKeyPath

public java.lang.String getKeyPath()

Returns the path to the component private key.

Returns:

The path to the private key.

getLogFile

public java.lang.String getLogFile()

Returns the path to the file where the component writes log messages.

Returns:

the path to the log file

getPassword

public java.lang.String getPassword()

Gets the component encryption password.

Returns:

the encryption password

getTrustedCertificates

public java.security.cert.Certificate[] getTrustedCertificates()

Returns the set of certificates trusted by the component. Valid only after the component's socket has been created.

Returns:

the component trusted certificates

getTrustedPath

public java.lang.String getTrustedPath()

Get the path to the component trusted certificate directory.

Returns:

the trusted certificate directory

setAuthenticate

public void setAuthenticate(boolean authenticate)

Determines whether or not the connection is authenticated.

Parameters:

authenticate - authenticate the connection?

setCertificatePath

public void setCertificatePath(java.lang.String path)

Sets the path to the file that contains the component certificate.

Parameters:

path - path to the certificate file

setConfiguration

public void setConfiguration(java.util.Properties config)
                      throws ConfigurationException

A convenience function for setting multiple Component configuration properties at once. Recognized elements of config are: "auth", the authorization indicator; "cert", the path to the certificate file; "key" the path to the component key; "logfile", the * path to the component log; "password", the encryption password; "trusted", the trusted cert directory.

Parameters:

config - contains configuration values

Throws:

ConfigurationException - on a faulty configuration property value

setKeyPath

public void setKeyPath(java.lang.String path)

Sets the path to the file that contains the component private key.

Parameters:

path - path to the private key file

setLogFile

public void setLogFile(java.lang.String path)
                throws ConfigurationException

Sets the path to the file where the component writes log messages.

Parameters:

path - the path to the log file

Throws:

ConfigurationException - if the path is not writable

setPassword

public void setPassword(java.lang.String password)

Sets the component encryption password.

Parameters:

password - the encryption password

setTrustedPath

public void setTrustedPath(java.lang.String path)

Set the trusted certificates to the contents of the directory given. The directory must be found in the classpath.

Parameters:

path - the trusted certificate directory path

createSocket

protected java.lang.Object createSocket(boolean serverSocket,
                                        java.lang.String host,
                                        int port)
                                 throws ConfigurationException,
                                        java.io.IOException

Creates and returns a socket with any appropriate authentication.

Parameters:

serverSocket - determines whether the return value is a Socket or a ServerSocket

host - the server host for client sockets; ignored for servers

port - the port to open (Server) or connect to (Clients)

Throws:

ConfigurationException - if a config attribute has a bad value

java.io.IOException - on socket creation failure

readCredentials

public void readCredentials()
                     throws java.io.IOException

Read in the credentials using the paths to the credentials and passphrase.

Throws:

java.io.IOException

readVersion

public static java.lang.String readVersion(java.lang.String versionFilename)

Read the version for the component from a file in the classpath.

Parameters:

versionFilename - The filename of the version file in the classpath

Returns:

A string containing the version read from file or "unknown" if not found.

openResourceStream

public static java.io.InputStream openResourceStream(java.lang.String resourcePath)

Returns an input stream for a resource found either in the classpath or on the file system. Returns null if the resource is not found.

Parameters:

resourcePath - the path (relative or absolute) to the resource

Returns:

an InputStream opened to the resource

configComponent

public static void configComponent(Component c,
                                   java.lang.String[] args,
                                   java.lang.String opts,
                                   java.lang.String prefix,
                                   java.lang.String exec,
                                   java.lang.String versionFilename)
                            throws ConfigurationException,
                                   java.io.IOException

A convenience function for configuring a Component (or descendent class) from the system properties, the arguments passed to main, and the properties file. Exits the program if parsing fails, or if the --help or --version arguments are included in args.

Parameters:

c - the component to configure

args - command-line arguments

opts - valid command-line options

prefix - property prefix from system props and property file

exec - main class name

versionFilename - classpath filename containing the version

Throws:

ConfigurationException - on faulty config properties

java.io.IOException - on an unreadable file property