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| /*
* @copyright
* Copyright © Microsoft Open Technologies, Inc.
*
* All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http: *www.apache.org/licenses/LICENSE-2.0
*
* THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS
* OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
* ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A
* PARTICULAR PURPOSE, MERCHANTABILITY OR NON-INFRINGEMENT.
*
* See the Apache License, Version 2.0 for the specific language
* governing permissions and limitations under the License.
*/
'use strict';
var request = require('request');
var uuid = require('node-uuid');
var Logger = require('./log').Logger;
var util = require('./util');
var WSTrustResponse = require('./wstrust-response');
var USERNAME_PLACEHOLDER = '{UsernamePlaceHolder}';
var PASSWORD_PLACEHOLDER = '{PasswordPlaceHolder}';
/**
* Creates a new instance of WSTrustRequest
* @constructor
* @private
* @param {object} callContext Contains any context information that applies to the request.
* @param {string} wstrustEndpointUrl An STS WS-Trust soap endpoint.
* @param {string} appliesTo A URI that identifies a service for which the a token is to be obtained.
*/
function WSTrustRequest(callContext, wstrustEndpointUrl, appliesTo) {
this._log = new Logger('WSTrustRequest', callContext._logContext);
this._callContext = callContext;
this._wstrustEndpointUrl = wstrustEndpointUrl;
this._appliesTo = appliesTo;
}
/**
* Given a Date object adds the minutes parameter and returns a new Date object.
* @private
* @static
* @memberOf WSTrustRequest
* @param {Date} date A Date object.
* @param {Number} minutes The number of minutes to add to the date parameter.
* @returns {Date} Returns a Date object.
*/
function _datePlusMinutes(date, minutes) {
var minutesInMilliSeconds = minutes * 60 * 1000;
var epochTime = date.getTime() + minutesInMilliSeconds;
return new Date(epochTime);
}
/**
* Builds the soap security header for the RST message.
* @private
* @param {string} username A username
* @param {string} password The passowrd that corresponds to the username parameter.
* @returns {string} A string that contains the soap security header.
*/
WSTrustRequest.prototype._buildSecurityHeader = function() {
var timeNow = new Date();
var expireTime =
_datePlusMinutes(timeNow, 10);
var timeNowString = timeNow.toISOString();
var expireTimeString = expireTime.toISOString();
var securityHeaderXml =
'<wsse:Security s:mustUnderstand=\'1\' xmlns:wsse=\'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\'>\
<wsu:Timestamp wsu:Id=\'_0\'>\
<wsu:Created>' + timeNowString + '</wsu:Created>\
<wsu:Expires>' + expireTimeString + '</wsu:Expires>\
</wsu:Timestamp>\
<wsse:UsernameToken wsu:Id=\'ADALUsernameToken\'>\
<wsse:Username>' + USERNAME_PLACEHOLDER + '</wsse:Username>\
<wsse:Password>' + PASSWORD_PLACEHOLDER + '</wsse:Password>\
</wsse:UsernameToken>\
</wsse:Security>';
return securityHeaderXml;
};
/**
* Replaces the placeholders in the RST template with the actual username and password values.
* @private
* @param {string} RSTTemplate An RST with placeholders for username and password.
* @param {string} username A username
* @param {string} password The passowrd that corresponds to the username parameter.
* @returns {string} A string containing a complete RST soap message.
*/
WSTrustRequest.prototype._populateRSTUsernamePassword = function(RSTTemplate, username, password) {
var RST = RSTTemplate.replace(USERNAME_PLACEHOLDER, username).replace(PASSWORD_PLACEHOLDER, password);
return RST;
};
/**
* Builds a WS-Trust RequestSecurityToken (RST) message using username password authentication.
* @private
* @param {string} username A username
* @param {string} password The passowrd that corresponds to the username parameter.
* @returns {string} A string containing a complete RST soap message.
*/
WSTrustRequest.prototype._buildRST = function(username, password) {
var messageID = uuid.v4();
// Create a template RST with placeholders for the username and password so the
// the RST can be logged without the sensitive information.
var RSTTemplate =
'<s:Envelope xmlns:s=\'http://www.w3.org/2003/05/soap-envelope\' xmlns:wsa=\'http://www.w3.org/2005/08/addressing\' xmlns:wsu=\'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd\'>\
<s:Header>\
<wsa:Action s:mustUnderstand=\'1\'>http://docs.oasis-open.org/ws-sx/ws-trust/200512/RST/Issue</wsa:Action>\
<wsa:messageID>urn:uuid:' + messageID + '</wsa:messageID>\
<wsa:ReplyTo>\
<wsa:Address>http://www.w3.org/2005/08/addressing/anonymous</wsa:Address>\
</wsa:ReplyTo>\
<wsa:To s:mustUnderstand=\'1\'>' + this._wstrustEndpointUrl + '</wsa:To>\
' + this._buildSecurityHeader() + '\
</s:Header>\
<s:Body>\
<wst:RequestSecurityToken xmlns:wst=\'http://docs.oasis-open.org/ws-sx/ws-trust/200512\'>\
<wsp:AppliesTo xmlns:wsp=\'http://schemas.xmlsoap.org/ws/2004/09/policy\'>\
<wsa:EndpointReference>\
<wsa:Address>' + this._appliesTo + '</wsa:Address>\
</wsa:EndpointReference>\
</wsp:AppliesTo>\
<wst:KeyType>http://docs.oasis-open.org/ws-sx/ws-trust/200512/Bearer</wst:KeyType>\
<wst:RequestType>http://docs.oasis-open.org/ws-sx/ws-trust/200512/Issue</wst:RequestType>\
</wst:RequestSecurityToken>\
</s:Body>\
</s:Envelope>';
this._log.verbose('Created RST: \n' + RSTTemplate);
var RST = this._populateRSTUsernamePassword(RSTTemplate, username, password);
return RST;
};
/**
* Handles the processing of a RSTR
* @private
* @param {string} body
* @param {WSTrustRequest.AcquireTokenCallback} callback
*/
WSTrustRequest.prototype._handleRSTR = function(body, callback) {
var err;
var wstrustResponse = new WSTrustResponse(this._callContext, body);
try {
wstrustResponse.parse();
} catch (error) {
err = error;
}
callback(err, wstrustResponse);
};
/**
* Performs a WS-Trust RequestSecurityToken request to obtain a federated token in exchange for a username password.
* @param {string} username A username
* @param {string} password The passowrd that corresponds to the username parameter.
* @param {WSTrustRequest.AcquireTokenCallback} callback Called once the federated token has been retrieved or on error.
*/
WSTrustRequest.prototype.acquireToken = function(username, password, callback) {
var self = this;
var RST = this._buildRST(username, password);
var options = util.createRequestOptions(
this,
{
headers : {
'Content-Type' : 'application/soap+xml; charset=utf-8',
'SOAPAction' : 'http://docs.oasis-open.org/ws-sx/ws-trust/200512/RST/Issue'
},
body : RST
}
);
this._log.verbose('Sending RST to: ' + this._wstrustEndpointUrl);
request.post(this._wstrustEndpointUrl, options, util.createRequestHandler('WS-Trust RST', this._log, callback,
function(response, body) {
self._handleRSTR(body, callback);
}
));
};
/**
* @callback AcquireTokenCallback
* @memberOf WSTrustRequest
* @param {Error} err Contains an error object if acquireToken fails.
* @param {WSTrustResponse} A successful response to the RST.
*/
module.exports = WSTrustRequest;
|