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adfs_server.js
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adfs_server.js
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if (!Accounts.adfs) {
Accounts.adfs = {};
}
var xmlbuilder = Npm.require('xmlbuilder')
var Fiber = Npm.require('fibers');
var connect = Npm.require('connect');
RoutePolicy.declare('/_adfs/', 'network');
service = _.find(Meteor.settings.adfs, function(adfsSetting) {
return adfsSetting.provider === adfsObject.serviceName;
});
Accounts.registerLoginHandler(function(loginRequest) {
if (!loginRequest.adfs || !loginRequest.credentialToken) {
return undefined;
}
var loginResult = Accounts.adfs.retrieveCredential(loginRequest.credentialToken);
if (loginResult && loginResult.profile && loginResult.profile.email) {
var user = Meteor.users.findOne({
'emails.address': loginResult.profile.email
});
if (!user)
throw new Error("Could not find an existing user with supplied email " + loginResult.profile.email);
//creating the token and adding to the user
var stampedToken = Accounts._generateStampedLoginToken();
Meteor.users.update(user, {
$push: {
'services.resume.loginTokens': stampedToken
}
});
//sending token along with the userId
return {
id: user._id,
token: stampedToken.token
}
} else {
throw new Error("ADFS Profile did not contain an email address");
}
});
Accounts.adfs._loginResultForCredentialToken = {};
Accounts.adfs.hasCredential = function(credentialToken) {
return _.has(Accounts.adfs._loginResultForCredentialToken, credentialToken);
}
Accounts.adfs.retrieveCredential = function(credentialToken) {
var result = Accounts.adfs._loginResultForCredentialToken[credentialToken];
delete Accounts.adfs._loginResultForCredentialToken[credentialToken];
return result;
}
// Listen to incoming OAuth http requests
WebApp.connectHandlers.use(connect.bodyParser()).use(function(req, res, next) {
// Need to create a Fiber since we're using synchronous http calls and nothing
// else is wrapping this in a fiber automatically
Fiber(function() {
middleware(req, res, next);
}).run();
});
middleware = function(req, res, next) {
// Make sure to catch any exceptions because otherwise we'd crash
// the runner
try {
var adfsObject = adfsUrlToObject(req.url);
if (!adfsObject || !adfsObject.serviceName) {
next();
return;
}
if (!adfsObject.actionName)
throw new Error("Missing ADFS action");
var service = _.find(Meteor.settings.adfs, function(adfsSetting) {
return adfsSetting.provider === adfsObject.serviceName;
});
// Skip everything if there's no service set by the adfs middleware
if (!service)
throw new Error("Unexpected ADFS service " + adfsObject.serviceName);
if (adfsObject.actionName === "authorize") {
service.callbackUrl = Meteor.absoluteUrl("_adfs/validate/" + service.provider + "/" + adfsObject.credentialToken);
service.id = adfsObject.credentialToken;
_adfs = new ADFS(service);
_adfs.getAuthorizeUrl(req, function(err, url) {
if (err)
throw new Error("Unable to generate authorize url");
res.writeHead(302, {
'Location': url
});
res.end();
});
} else if (adfsObject.actionName === "validate") {
_adfs = new ADFS(service);
_adfs.validateResponse(req.body.ADFSResponse, function(err, profile, loggedOut) {
if (err)
throw new Error("Unable to validate response url");
var credentialToken = profile.inResponseToId || profile.InResponseTo || adfsObject.credentialToken;
if (!credentialToken)
throw new Error("Unable to determine credentialToken");
Accounts.adfs._loginResultForCredentialToken[credentialToken] = {
profile: profile
};
closePopup(res);
});
} else if (adfsObject.actionName === "metadata") {
var cert = service.cert
var t = generateServiceProviderMetadata(cert, req, res, next)
res.write(t)
res.end()
} else {
throw new Error("Unexpected ADFS action " + adfsObject.actionName);
}
} catch (err) {
closePopup(res, err);
}
};
var adfsUrlToObject = function(url) {
// req.url will be "/_adfs/<action>/<service name>/<credentialToken>"
if (!url)
return null;
var splitPath = url.split('/');
// Any non-adfs request will continue down the default
// middlewares.
if (splitPath[1] !== '_adfs')
return null;
return {
actionName: splitPath[2],
serviceName: splitPath[3],
credentialToken: splitPath[4]
};
};
var closePopup = function(res, err) {
res.writeHead(200, {
'Content-Type': 'text/html'
});
var content =
'<html><head><script>window.close()</script></head></html>';
if (err)
content = '<html><body><h2>Sorry, an error occured</h2><div>' + err + '</div><a onclick="window.close();">Close Window</a></body></html>';
res.end(content, 'utf-8');
};
var generateServiceProviderMetadata = function(decryptionCert, req, res, next) {
var keyDescriptor = null;
var adfsObject = adfsUrlToObject(req.url);
var service = _.find(Meteor.settings.adfs, function(adfsSetting) {
return adfsSetting.provider === adfsObject.serviceName;
});
if (service.decryptionPvk) {
if (!decryptionCert) {
throw new Error(
"Missing decryptionCert while generating metadata for decrypting service provider");
}
decryptionCert = decryptionCert.replace(/-+BEGIN CERTIFICATE-+\r?\n?/, '');
decryptionCert = decryptionCert.replace(/-+END CERTIFICATE-+\r?\n?/, '');
keyDescriptor = {
'ds:KeyInfo': {
'ds:X509Data': {
'ds:X509Certificate': {
'#text': decryptionCert
}
}
},
'#list': [
// this should be the set that the xmlenc library supports
{
'EncryptionMethod': {
'@Algorithm': 'http://www.w3.org/2001/04/xmlenc#aes256-cbc'
}
}, {
'EncryptionMethod': {
'@Algorithm': 'http://www.w3.org/2001/04/xmlenc#aes128-cbc'
}
}, {
'EncryptionMethod': {
'@Algorithm': 'http://www.w3.org/2001/04/xmlenc#tripledes-cbc'
}
},
]
};
}
if (!service.callbackUrl) {
throw new Error(
"Unable to generate service provider metadata when callbackUrl option is not set");
}
var metadata = {
'EntityDescriptor': {
'@xmlns': 'urn:oasis:names:tc:SAML:2.0:metadata',
'@xmlns:ds': 'http://www.w3.org/2000/09/xmldsig#',
'@entityID': !service.issuer,
'SPSSODescriptor': {
'@protocolSupportEnumeration': 'urn:oasis:names:tc:SAML:2.0:protocol',
'KeyDescriptor': keyDescriptor,
'NameIDFormat': "Name ID",
'AssertionConsumerService': {
'@index': '1',
'@isDefault': 'true',
'@Binding': 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST',
'@Location': service.callbackUrl
}
},
}
};
return xmlbuilder.create(metadata).end({
pretty: true,
indent: ' ',
newline: '\n'
});
};