Developing New Data Types with Plone

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The document discusses how Northwestern University developed a Blackboard Building Block that integrates Plone, an open source content management system, to provide additional content types and workflow capabilities for Blackboard users. It describes how Plone is used as an image repository for an image zooming and annotation tool. It also discusses an Application Link Maker that was created to provide single sign-on functionality between Blackboard and external tools like Plone through encrypting URLs and verifying user identities and timestamps.

Delivering New Data Types With Plone: © Blackboard, Inc. © Northwestern University All rights reserved. A Building Block for Versatile Content Management Patricia Goldweic, Brian Nielsen Northwestern University

Session Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

About Northwestern University ,[object Object],[object Object],[object Object]

NU’s Earlier B 2 Development ,[object Object],[object Object]

How Many Times Will We Have To Do This? ,[object Object]

Two Possible Solutions ,[object Object],[object Object]

Our Answer: the Application Link Maker B 2 And . . .

Plone: http://plone.org ,[object Object],[object Object],[object Object],[object Object],[object Object]

Application Link Maker as A General Purpose Single sign-on Mechanism ,[object Object],[object Object],[object Object]

Exploring the Application Link Maker Side ,[object Object],[object Object],[object Object],[object Object]

EncryptionUtils.java class ,[object Object],[object Object],[object Object],[object Object]

http request resource location one-way encryption key user identity course identity timestamp any other parameters

Receiver Processing confirms valid encryption: (user identity and timestamp) logs user on places user in “course”

$Package edu.northwestern.at.encryptionutils package edu.northwestern.at.encryptionutils; import java.security.*; import java.util.*; import edu.northwestern.at.utils.*; import edu.northwestern.at.ntp.NUClockSkewUtils; /** * * This class implements a simple encryption (hashing) algorithm as follows: * * It provides the ability to: * - Encrypt a (string) password given as additional inputs a user id string, and a MessageDigest algorithm * (method 'encrypt'). The encryption is time-based and it is done using the MessageDigest class in * the JSDK, and using as inputs the string, the user id and the current time. * - Verify whether a given (encrypted) string has been obtained using the previous mechanism and * passes the 'time' test (that is, whether the encryption and verification happen within a restricted * time frame). (method: 'verify). * * * @author Patricia Goldweic */ public class EncryptionUtil { /** This algorithm's password */ private String m_pass; . . . (available, site TBD)$

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Jericho Project OverviewJaco Koekemoer

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