public static StringBuilder BuildMessage(string appliesTo, WsTrustAddress wsTrustAddress,
UserCredential credential)
{
// securityHeader will be empty string for Kerberos.
StringBuilder securityHeaderBuilder = BuildSecurityHeader(wsTrustAddress, credential);
string guid = Guid.NewGuid().ToString();
StringBuilder messageBuilder = new StringBuilder(MaxExpectedMessageSize);
String schemaLocation = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd";
String soapAction = "http://docs.oasis-open.org/ws-sx/ws-trust/200512/RST/Issue";
String rstTrustNamespace = "http://docs.oasis-open.org/ws-sx/ws-trust/200512";
String keyType = "http://docs.oasis-open.org/ws-sx/ws-trust/200512/Bearer";
String requestType = "http://docs.oasis-open.org/ws-sx/ws-trust/200512/Issue";
if (wsTrustAddress.Version == WsTrustVersion.WsTrust2005)
{
soapAction = "http://schemas.xmlsoap.org/ws/2005/02/trust/RST/Issue";
rstTrustNamespace = "http://schemas.xmlsoap.org/ws/2005/02/trust";
keyType = "http://schemas.xmlsoap.org/ws/2005/05/identity/NoProofKey";
requestType = "http://schemas.xmlsoap.org/ws/2005/02/trust/Issue";
}
messageBuilder.AppendFormat(CultureInfo.CurrentCulture, WsTrustEnvelopeTemplate,
schemaLocation, soapAction,
guid, wsTrustAddress.Uri, securityHeaderBuilder,
rstTrustNamespace, appliesTo, keyType,
requestType);
securityHeaderBuilder.SecureClear();
return(messageBuilder);
}
public static async Task <WsTrustResponse> SendRequestAsync(WsTrustAddress wsTrustAddress, UserCredential credential, CallState callState)
{
IHttpClient request = PlatformPlugin.HttpClientFactory.Create(wsTrustAddress.Uri.AbsoluteUri, callState);
request.ContentType = "application/soap+xml";
if (credential.UserAuthType == UserAuthType.IntegratedAuth)
{
SetKerberosOption(request);
}
StringBuilder messageBuilder = BuildMessage(DefaultAppliesTo, wsTrustAddress, credential);
string soapAction = XmlNamespace.Issue.ToString();
if (wsTrustAddress.Version == WsTrustVersion.WsTrust2005)
{
soapAction = XmlNamespace.Issue2005.ToString();
}
WsTrustResponse wstResponse;
try
{
request.BodyParameters = new StringRequestParameters(messageBuilder);
request.Headers["SOAPAction"] = soapAction;
IHttpWebResponse response = await request.GetResponseAsync();
wstResponse = WsTrustResponse.CreateFromResponse(response.ResponseStream, wsTrustAddress.Version);
}
catch (WebException ex)
{
string errorMessage;
try
{
XDocument responseDocument = WsTrustResponse.ReadDocumentFromResponse(ex.Response.GetResponseStream());
errorMessage = WsTrustResponse.ReadErrorResponse(responseDocument, callState);
}
catch (AdalException)
{
errorMessage = "See inner exception for detail.";
}
throw new AdalServiceException(
AdalError.FederatedServiceReturnedError,
string.Format(AdalErrorMessage.FederatedServiceReturnedErrorTemplate, wsTrustAddress.Uri, errorMessage),
null,
ex);
}
return(wstResponse);
}
private static StringBuilder BuildSecurityHeader(WsTrustAddress address, UserCredential credential)
{
StringBuilder securityHeaderBuilder = new StringBuilder(MaxExpectedMessageSize);
// Not add <Security> element if the credential type is kerberos
if (credential.UserAuthType == UserAuthType.UsernamePassword)
{
StringBuilder messageCredentialsBuilder = new StringBuilder(MaxExpectedMessageSize);
string guid = Guid.NewGuid().ToString();
messageCredentialsBuilder.AppendFormat(CultureInfo.CurrentCulture,
"<o:UsernameToken u:Id='uuid-{0}'><o:Username>{1}</o:Username><o:Password>", guid,
credential.UserName);
char[] passwordChars = null;
try
{
passwordChars = credential.PasswordToCharArray();
string escapeStr = XmlEscape(new string(passwordChars));
messageCredentialsBuilder.Append(escapeStr);
escapeStr = "";
}
finally
{
passwordChars.SecureClear();
}
messageCredentialsBuilder.AppendFormat(CultureInfo.CurrentCulture, "</o:Password></o:UsernameToken>");
//
// Timestamp the message
//
DateTime currentTime = DateTime.UtcNow;
string currentTimeString = BuildTimeString(currentTime);
// Expiry is 10 minutes after creation
DateTime expiryTime = currentTime.AddMinutes(10);
string expiryTimeString = BuildTimeString(expiryTime);
securityHeaderBuilder.AppendFormat(CultureInfo.CurrentCulture,
"<o:Security s:mustUnderstand='1' xmlns:o='http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd'><u:Timestamp u:Id='_0'><u:Created>{0}</u:Created><u:Expires>{1}</u:Expires></u:Timestamp>{2}</o:Security>",
currentTimeString,
expiryTimeString,
messageCredentialsBuilder);
messageCredentialsBuilder.SecureClear();
}
return(securityHeaderBuilder);
}
protected override async Task PreTokenRequest()
{
await base.PreTokenRequest();
if (this.PerformUserRealmDiscovery())
{
UserRealmDiscoveryResponse userRealmResponse = await UserRealmDiscoveryResponse.CreateByDiscoveryAsync(this.Authenticator.UserRealmUri, this.userCredential.UserName, this.CallState);
PlatformPlugin.Logger.Information(this.CallState, string.Format(CultureInfo.CurrentCulture, " User with hash '{0}' detected as '{1}'", PlatformPlugin.CryptographyHelper.CreateSha256Hash(this.userCredential.UserName), userRealmResponse.AccountType));
if (string.Compare(userRealmResponse.AccountType, "federated", StringComparison.OrdinalIgnoreCase) == 0)
{
if (string.IsNullOrWhiteSpace(userRealmResponse.FederationMetadataUrl))
{
throw new AdalException(AdalError.MissingFederationMetadataUrl);
}
WsTrustAddress wsTrustAddress = await MexParser.FetchWsTrustAddressFromMexAsync(userRealmResponse.FederationMetadataUrl, this.userCredential.UserAuthType, this.CallState);
PlatformPlugin.Logger.Information(this.CallState, string.Format(CultureInfo.CurrentCulture, " WS-Trust endpoint '{0}' fetched from MEX at '{1}'", wsTrustAddress.Uri, userRealmResponse.FederationMetadataUrl));
WsTrustResponse wsTrustResponse = await WsTrustRequest.SendRequestAsync(wsTrustAddress, this.userCredential, this.CallState);
PlatformPlugin.Logger.Information(this.CallState, string.Format(CultureInfo.CurrentCulture, " Token of type '{0}' acquired from WS-Trust endpoint", wsTrustResponse.TokenType));
// We assume that if the response token type is not SAML 1.1, it is SAML 2
this.userAssertion = new UserAssertion(wsTrustResponse.Token, (wsTrustResponse.TokenType == WsTrustResponse.Saml1Assertion) ? OAuthGrantType.Saml11Bearer : OAuthGrantType.Saml20Bearer);
}
else if (string.Compare(userRealmResponse.AccountType, "managed", StringComparison.OrdinalIgnoreCase) == 0)
{
// handle password grant flow for the managed user
if (this.userCredential.PasswordToCharArray() == null)
{
throw new AdalException(AdalError.PasswordRequiredForManagedUserError);
}
}
else
{
throw new AdalException(AdalError.UnknownUserType);
}
}
}
internal static WsTrustAddress ExtractWsTrustAddressFromMex(XDocument mexDocument, UserAuthType userAuthType, CallState callState)
{
WsTrustAddress address = null;
MexPolicy policy = null;
try
{
Dictionary <string, MexPolicy> policies = ReadPolicies(mexDocument);
Dictionary <string, MexPolicy> bindings = ReadPolicyBindings(mexDocument, policies);
SetPolicyEndpointAddresses(mexDocument, bindings);
Random random = new Random();
//try ws-trust 1.3 first
policy = policies.Values.Where(p => p.Url != null && p.AuthType == userAuthType && p.Version == WsTrustVersion.WsTrust13).OrderBy(p => random.Next()).FirstOrDefault() ??
policies.Values.Where(p => p.Url != null && p.AuthType == userAuthType).OrderBy(p => random.Next()).FirstOrDefault();
if (policy != null)
{
address = new WsTrustAddress();
address.Uri = policy.Url;
address.Version = policy.Version;
}
else if (userAuthType == UserAuthType.IntegratedAuth)
{
throw new AdalException(AdalError.IntegratedAuthFailed, new AdalException(AdalError.WsTrustEndpointNotFoundInMetadataDocument));
}
else
{
throw new AdalException(AdalError.WsTrustEndpointNotFoundInMetadataDocument);
}
}
catch (XmlException ex)
{
throw new AdalException(AdalError.ParsingWsMetadataExchangeFailed, ex);
}
return(address);
}