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PICS/DSig Standard Library

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PICS/DSig Standard Library in Java

Download US Version (ZIP, 1.3MB) 5/20/98
Download Non-US Version (ZIP, .9MB) 5/20/98

PICS/DSig Standard Library documentation
Browse the API (javadoc).

*NEW* Version 1.2 Now Available

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NOTE:As of Version 1.2, the PICS Standard Library and the DSig Reference Code were merged.

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The PICS/DSig Standard Library consists of three parts:

1. Java Classes -- A set of Java classes for the basic components of PICS -- Label, Service, and Profile.
2. Parsers -- A set of parsers for converting text files containing label lists, service descriptions, and PICSRules profiles into Label, Service, and Profile Java objects.
3. DSig Modules -- A set of Java Packages that allow PICS labels to be signed and verified.

The PICS/DSig Standard Library currently has the following features:

• It can parse any label list, service description, or profile and output the corresponding Java object.
• It can parse a profile and a label list, evaluate them, and indicate which labels were passed by the profile, and which were blocked.
• It can parse a label list and generate DSig1.0-ready canonicalized labels (suitable for signing).
• It can scan an HTML page for labels embedded in its header.
• It can process an HTML page against a profiles, using the labels contained in the HTML file's header.
• It can write SQL-compliant subqueries intended for use with the Jigsaw Label Bureau.
• *NEW*It can contact PICS Label Bureaus to find labels for particular URLs.
• *NEW*It can both sign and verify PICS labels, in the manner as specified in DSig 1.0.

Java Classes

The full API (javadoc) is available for browsing. Below is a brief description of each packages:

• w3c.crypto.us.dsig -- Contains classes necessary for using the RSA Signature Algorithm.
• w3c.pics.parser -- The PICS Standard Library. (More details below).
• w3c.tools.codec -- Encoder/Decoder for Base64
• w3c.tools.sexpr -- An S-expression Parser.
• w3c.tools.sorter -- A sorter class
• w3c.www.dsig -- The DSig Reference Code
• w3c.www.pics -- The older W3C PICS Parser. Compatible with DSig but not with the PICS Standard Library.

PICS and DSig Design Information

The PICS portion of the library can be used independantly of the DSig components. More information about the PICS code can be found in the PICS Design Document.

The DSig portion of the library is further described in the DSig Design Document.

Reporting Bugs

Be sure to read the Known Bugs / What's New Page. It will be updated as bugs are discovered and fixed and as new features are added to the library.

Credits

DSig Code	PICS Code
DSig Code Coordinator Yang-hua Chu, Carnegie Mellon University, yhchu@cs.cmu.edu	PICS Code Coordinator David Shapiro, MIT/W3C, dshapiro@w3.org
Mark Champine, Iris, champine@iris.com	Jennifer Berk, MIT, jcberk@mit.edu
Vasanthan Dasan, Sun, vasanthan.dasan@central.sun.com	Kyle Jamieson, MIT/W3C, jamieson@mit.edu
Ora Lassila, Nokia, ora.lassila@research.nokia.com	Terrance Poon, MIT, tpoon@mit.edu
Peter Lipp, University of Technology, Graz, plipp@iaik.tu-graz.ac.at	Paul Resnick, University of Michigan, presnick@umich.edu
David Shapiro, MIT/W3C, dshapiro@w3.org	Sun Microsystems JavaCC, JavaCC Home Page
Andreas Sterbenz, University of Technology, Graz, sterbenz@iaik.tu-graz.ac.at

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dshapiro@w3.org

20 May 98