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419 lines
18 KiB
C#
419 lines
18 KiB
C#
//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.IdentityModel.Tokens
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{
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IdentityModel.Configuration;
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using System.IdentityModel.Diagnostics;
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using System.IdentityModel.Selectors;
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using System.Security.Claims;
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using System.Security.Cryptography.X509Certificates;
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using System.ServiceModel.Security;
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using System.Text;
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using System.Xml;
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/// <summary>
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/// Extends SecurityTokenRequirement by adding new properties which are
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/// useful for issued tokens.
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/// </summary>
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public class SamlSecurityTokenRequirement
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{
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//
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// The below defaults will only be used if some verification properties are set in config and others are not
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//
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static X509RevocationMode DefaultRevocationMode = X509RevocationMode.Online;
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static X509CertificateValidationMode DefaultValidationMode = X509CertificateValidationMode.PeerOrChainTrust;
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static StoreLocation DefaultStoreLocation = StoreLocation.LocalMachine;
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string _nameClaimType = ClaimsIdentity.DefaultNameClaimType;
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string _roleClaimType = ClaimTypes.Role;
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bool _mapToWindows;
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X509CertificateValidator _certificateValidator;
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/// <summary>
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/// Creates an instance of <see cref="SamlSecurityTokenRequirement"/>
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/// </summary>
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public SamlSecurityTokenRequirement()
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{
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}
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/// <summary>
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/// Creates an instance of <see cref="SamlSecurityTokenRequirement"/>
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/// <param name="element">The XmlElement from which the instance is to be loaded.</param>
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/// </summary>
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public SamlSecurityTokenRequirement(XmlElement element)
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{
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if (element == null)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("element");
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}
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if (element.LocalName != ConfigurationStrings.SamlSecurityTokenRequirement)
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{
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throw DiagnosticUtility.ThrowHelperInvalidOperation(SR.GetString(SR.ID7000, ConfigurationStrings.SamlSecurityTokenRequirement, element.LocalName));
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}
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bool foundCustomX509Validator = false;
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X509RevocationMode revocationMode = DefaultRevocationMode;
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X509CertificateValidationMode certificateValidationMode = DefaultValidationMode;
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StoreLocation trustedStoreLocation = DefaultStoreLocation;
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string customValidator = null;
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foreach (XmlAttribute attribute in element.Attributes)
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{
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if (StringComparer.OrdinalIgnoreCase.Equals(attribute.LocalName, ConfigurationStrings.MapToWindows))
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{
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bool outMapToWindows = false;
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if (!bool.TryParse(attribute.Value, out outMapToWindows))
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{
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throw DiagnosticUtility.ThrowHelperInvalidOperation(SR.GetString(SR.ID7022, attribute.Value));
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}
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this.MapToWindows = outMapToWindows;
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(attribute.LocalName, ConfigurationStrings.IssuerCertificateValidator))
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{
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customValidator = attribute.Value.ToString();
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(attribute.LocalName, ConfigurationStrings.IssuerCertificateRevocationMode))
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{
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foundCustomX509Validator = true;
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string revocationModeString = attribute.Value.ToString();
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if (StringComparer.OrdinalIgnoreCase.Equals(revocationModeString, ConfigurationStrings.X509RevocationModeNoCheck))
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{
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revocationMode = X509RevocationMode.NoCheck;
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(revocationModeString, ConfigurationStrings.X509RevocationModeOffline))
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{
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revocationMode = X509RevocationMode.Offline;
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(revocationModeString, ConfigurationStrings.X509RevocationModeOnline))
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{
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revocationMode = X509RevocationMode.Online;
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}
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else
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ID7011, attribute.LocalName, element.LocalName)));
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}
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(attribute.LocalName, ConfigurationStrings.IssuerCertificateValidationMode))
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{
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foundCustomX509Validator = true;
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string validationModeString = attribute.Value.ToString();
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if (StringComparer.OrdinalIgnoreCase.Equals(validationModeString, ConfigurationStrings.X509CertificateValidationModeChainTrust))
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{
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certificateValidationMode = X509CertificateValidationMode.ChainTrust;
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(validationModeString, ConfigurationStrings.X509CertificateValidationModePeerOrChainTrust))
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{
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certificateValidationMode = X509CertificateValidationMode.PeerOrChainTrust;
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(validationModeString, ConfigurationStrings.X509CertificateValidationModePeerTrust))
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{
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certificateValidationMode = X509CertificateValidationMode.PeerTrust;
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(validationModeString, ConfigurationStrings.X509CertificateValidationModeNone))
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{
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certificateValidationMode = X509CertificateValidationMode.None;
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(validationModeString, ConfigurationStrings.X509CertificateValidationModeCustom))
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{
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certificateValidationMode = X509CertificateValidationMode.Custom;
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}
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else
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ID7011, attribute.LocalName, element.LocalName)));
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}
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(attribute.LocalName, ConfigurationStrings.IssuerCertificateTrustedStoreLocation))
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{
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foundCustomX509Validator = true;
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string trustedStoreLocationString = attribute.Value.ToString();
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if (StringComparer.OrdinalIgnoreCase.Equals(trustedStoreLocationString, ConfigurationStrings.X509TrustedStoreLocationCurrentUser))
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{
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trustedStoreLocation = StoreLocation.CurrentUser;
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}
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else if (StringComparer.OrdinalIgnoreCase.Equals(trustedStoreLocationString, ConfigurationStrings.X509TrustedStoreLocationLocalMachine))
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{
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trustedStoreLocation = StoreLocation.LocalMachine;
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}
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else
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ID7011, attribute.LocalName, element.LocalName)));
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}
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}
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else
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ID7004, attribute.LocalName, element.LocalName)));
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}
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}
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List<XmlElement> configElements = XmlUtil.GetXmlElements(element.ChildNodes);
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foreach (XmlElement childElement in configElements)
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{
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if (StringComparer.Ordinal.Equals(childElement.LocalName, ConfigurationStrings.NameClaimType))
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{
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if (childElement.Attributes.Count != 1 || !StringComparer.Ordinal.Equals(childElement.Attributes[0].LocalName, ConfigurationStrings.Value))
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{
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throw DiagnosticUtility.ThrowHelperInvalidOperation(SR.GetString(SR.ID7001, String.Format(System.Globalization.CultureInfo.InvariantCulture, "{0}/{1}", element.LocalName, childElement.LocalName), ConfigurationStrings.Value));
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}
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this.NameClaimType = childElement.Attributes[0].Value;
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}
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else if (StringComparer.Ordinal.Equals(childElement.LocalName, ConfigurationStrings.RoleClaimType))
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{
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if (childElement.Attributes.Count != 1 || !StringComparer.Ordinal.Equals(childElement.Attributes[0].LocalName, ConfigurationStrings.Value))
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{
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throw DiagnosticUtility.ThrowHelperInvalidOperation(SR.GetString(SR.ID7001, String.Format(System.Globalization.CultureInfo.InvariantCulture, "{0}/{1}", element.LocalName, childElement.LocalName), ConfigurationStrings.Value));
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}
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this.RoleClaimType = childElement.Attributes[0].Value;
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}
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else
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{
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throw DiagnosticUtility.ThrowHelperInvalidOperation(SR.GetString(SR.ID7002, childElement.LocalName, ConfigurationStrings.SamlSecurityTokenRequirement));
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}
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}
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if (certificateValidationMode == X509CertificateValidationMode.Custom)
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{
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if (string.IsNullOrEmpty(customValidator))
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{
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throw DiagnosticUtility.ThrowHelperInvalidOperation(SR.GetString(SR.ID7028));
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}
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Type customValidatorType = Type.GetType(customValidator, true);
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if (customValidatorType == null)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("value", SR.GetString(SR.ID7007, customValidatorType));
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}
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_certificateValidator = CustomTypeElement.Resolve<X509CertificateValidator>(new CustomTypeElement(customValidatorType));
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}
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else if (foundCustomX509Validator)
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{
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_certificateValidator = X509Util.CreateCertificateValidator(certificateValidationMode, revocationMode, trustedStoreLocation);
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}
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}
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/// <summary>
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/// Gets/sets the X509CertificateValidator associated with this token requirement
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/// </summary>
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public X509CertificateValidator CertificateValidator
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{
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get
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{
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return _certificateValidator;
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}
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set
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{
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if (value == null)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value");
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}
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_certificateValidator = value;
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}
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}
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/// <summary>
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/// Gets or sets the Claim Type that will be used to generate the
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/// FederatedIdentity.Name property.
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/// </summary>
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public string NameClaimType
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{
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get
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{
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return _nameClaimType;
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}
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set
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{
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_nameClaimType = value;
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}
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}
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/// <summary>
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/// Gets the Claim Types that are used to generate the
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/// FederatedIdentity.Roles property.
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/// </summary>
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public string RoleClaimType
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{
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get
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{
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return _roleClaimType;
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}
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set
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{
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_roleClaimType = value;
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}
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}
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/// <summary>
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/// Determines if the token handler will attempt to map the SAML identity to a
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/// Windows identity via the unique principal name (UPN) claim.
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/// </summary>
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public bool MapToWindows
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{
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get { return _mapToWindows; }
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set { _mapToWindows = value; }
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}
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/// <summary>
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/// Checks if Audience Enforcement checks are required for the given token
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/// based on this SamlSecurityTokenRequirement settings.
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/// </summary>
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/// <param name="audienceUriMode">
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/// The <see cref="AudienceUriMode"/> defining the audience requirement.
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/// </param>
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/// <param name="token">The Security token to be tested for Audience
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/// Enforcement.</param>
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/// <returns>True if Audience Enforcement should be applied.</returns>
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/// <exception cref="ArgumentNullException">The input argument 'token' is null.</exception>
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public virtual bool ShouldEnforceAudienceRestriction(AudienceUriMode audienceUriMode, SecurityToken token)
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{
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if (null == token)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("token");
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}
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//
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// Use AudienceUriMode to determine whether the audience
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// should be enforced
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//
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switch (audienceUriMode)
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{
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case AudienceUriMode.Always:
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return true;
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case AudienceUriMode.Never:
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return false;
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case AudienceUriMode.BearerKeyOnly:
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#pragma warning suppress 56506
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return (null == token.SecurityKeys || 0 == token.SecurityKeys.Count);
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default:
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ID4025, audienceUriMode)));
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}
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}
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/// <summary>
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/// Checks the given list of Audience URIs with the AllowedAudienceUri list.
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/// </summary>
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/// <param name="allowedAudienceUris">Collection of AudienceUris.</param>
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/// <param name="tokenAudiences">Collection of audience URIs the token applies to.</param>
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/// <exception cref="ArgumentNullException">The input argument 'allowedAudienceUris' is null.</exception>
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/// <exception cref="ArgumentNullException">The input argument 'tokenAudiences' is null.</exception>
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/// <exception cref="AudienceUriValidationFailedException">Either the input argument 'tokenAudiences' or the configured
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/// 'AudienceUris' collection is empty.</exception>
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public virtual void ValidateAudienceRestriction(IList<Uri> allowedAudienceUris, IList<Uri> tokenAudiences)
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{
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if (null == allowedAudienceUris)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("allowedAudienceUris");
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}
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if (null == tokenAudiences)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("tokenAudiences");
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}
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if (0 == tokenAudiences.Count)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new AudienceUriValidationFailedException(
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SR.GetString(SR.ID1036)));
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}
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if (0 == allowedAudienceUris.Count)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new AudienceUriValidationFailedException(
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SR.GetString(SR.ID1043)));
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}
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bool found = false;
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foreach (Uri audience in tokenAudiences)
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{
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if (audience != null)
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{
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// Strip off any query string or fragment. This is necessary because the
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// CardSpace uses the raw Request-URI to form the audience when issuing
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// tokens for personal cards, but we clearly don't want things like the
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// ReturnUrl parameter affecting the audience matching.
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Uri audienceLeftPart;
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if (audience.IsAbsoluteUri)
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{
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audienceLeftPart = new Uri(audience.GetLeftPart(UriPartial.Path));
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}
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else
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{
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Uri baseUri = new Uri("http://www.example.com");
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Uri resolved = new Uri(baseUri, audience);
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audienceLeftPart = baseUri.MakeRelativeUri(new Uri(resolved.GetLeftPart(UriPartial.Path)));
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}
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if (allowedAudienceUris.Contains(audienceLeftPart))
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{
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found = true;
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break;
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}
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}
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}
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if (!found)
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{
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#pragma warning suppress 56506
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if (1 == tokenAudiences.Count || null != tokenAudiences[0])
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new AudienceUriValidationFailedException(
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SR.GetString(SR.ID1038, tokenAudiences[0].OriginalString)));
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}
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else
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{
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StringBuilder sb = new StringBuilder(SR.GetString(SR.ID8007));
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bool first = true;
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foreach (Uri a in tokenAudiences)
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{
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if (a != null)
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{
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if (first)
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{
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first = false;
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}
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else
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{
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sb.Append(", ");
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}
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sb.Append(a.OriginalString);
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}
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}
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TraceUtility.TraceString(TraceEventType.Error, sb.ToString());
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new AudienceUriValidationFailedException(SR.GetString(SR.ID1037)));
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}
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}
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}
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}
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}
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