95 lines
3.1 KiB
Groovy
95 lines
3.1 KiB
Groovy
/*
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BigBlueButton open source conferencing system - http://www.bigbluebutton.org/
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Copyright (c) 2012 BigBlueButton Inc. and by respective authors (see below).
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This program is free software; you can redistribute it and/or modify it under the
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terms of the GNU Lesser General Public License as published by the Free Software
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Foundation; either version 3.0 of the License, or (at your option) any later
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version.
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BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
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*/
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package org.bigbluebutton
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import grails.transaction.Transactional
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import java.util.Map
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import javax.crypto.spec.SecretKeySpec
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import javax.crypto.Mac
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import org.apache.commons.codec.binary.Base64
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@Transactional
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class LtiService {
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def endPoint = "http://localhost/lti/tool"
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def consumers = "demo:welcome"
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def mode = "simple"
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Map<String, String> consumerMap
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def retrieveIconEndpoint() {
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return endPoint.replaceFirst("tool", "images/icon.ico")
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}
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def retrieveBasicLtiEndpoint() {
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return endPoint
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}
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private Map<String, String> getConsumer(consumerId) {
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Map<String, String> consumer = null
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if( this.consumerMap.containsKey(consumerId) ){
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consumer = new HashMap<String, String>()
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consumer.put("key", consumerId)
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consumer.put("secret", this.consumerMap.get(consumerId))
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}
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return consumer
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}
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private void initConsumerMap(){
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this.consumerMap = new HashMap<String, String>()
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String[] consumers = this.consumers.split(",")
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//for( int i=0; i < consumers.length; i++){
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if ( consumers.length > 0 ){
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int i = 0;
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String[] consumer = consumers[i].split(":")
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if( consumer.length == 2 ){
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this.consumerMap.put(consumer[0], consumer[1])
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}
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}
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}
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public String sign(String sharedSecret, String data) throws Exception {
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Mac mac = setKey(sharedSecret)
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// Signed String must be BASE64 encoded.
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byte[] signBytes = mac.doFinal(data.getBytes("UTF8"))
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String signature = encodeBase64(signBytes)
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return signature;
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}
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private Mac setKey(String sharedSecret) throws Exception {
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Mac mac = Mac.getInstance("HmacSHA1")
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byte[] keyBytes = sharedSecret.getBytes("UTF8")
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SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1")
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mac.init(signingKey)
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return mac
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}
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private String encodeBase64(byte[] signBytes) {
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return Base64.encodeBase64URLSafeString(signBytes)
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}
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def logParameters(Object params) {
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log.debug "----------------------------------"
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for( param in params ) log.debug "${param.getKey()}=${param.getValue()}"
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log.debug "----------------------------------"
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}
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}
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