当绑定安全性为TransportCredentially时,在WCF REST中创建自定义IIdentity

我需要实现一个使用HTTP基本身份验证的REST服务。因为它是在现有基础设施上构建的,所以我需要将它作为一个WCF服务来实现。由于向后兼容和集成到现有生态系统中,我需要将用户名和密码都传递给服务(请不要在此时发现可能的安全隐患)。由于默认情况下,WCF运行时会从头部剥离身份验证信息,因此我的解决方案是创建一个自定义的 IIdentity 它包含密码信息,我可以在服务级别访问这些信息:

public class UserIdentity : GenericIdentity
{
    private readonly bool m_isAuthenticated;

    public string Password {
        get;
    }

    public override bool IsAuthenticated {
        get {
            return base.IsAuthenticated && m_isAuthenticated;
        }
    }
    public UserIdentity(IIdentity existingIdentity, string password)
        : base(existingIdentity.Name)
    {
        m_isAuthenticated = existingIdentity.IsAuthenticated;
        Password = password;
    }
}

我尝试了以下方式转发密码,但都没有成功:

1. 实现自定义 UserNamePasswordValidator ,可以访问密码,但只能处理身份验证。无法创建或修改 三、身份 .
2. 创建自定义 ServiceCredentials as described in this article ,当绑定安全性设置为 Transport . 但是,这需要到服务的HTTPS连接,这对我来说是不可行的,因为传输级别的安全性由上游的负载平衡器处理。服务本身必须是HTTP。因此,安全设置为 TransportCredentialOnly . 其效果是 服务凭据 类从不由WCF运行时初始化(与安全性设置为的不同 运输 )
3. 配置自定义 AuthorizationPoliciy 直接在 app.config . 在这种情况下,自定义授权策略已初始化,但在密码信息不再可用的情况下调用它(用初始化时这不是问题) 服务凭据 ,因为它在初始化期间确实收到密码)。

习惯 服务凭据 和 AuthorizationPolicy 实现方法如下:

public class UserServiceCredentials : ServiceCredentials
{
    public UserServiceCredentials()
    {
    }

    protected UserServiceCredentials(ServiceCredentials other) : base(other)
    {
    }

    protected override ServiceCredentials CloneCore()
    {
        return new UserServiceCredentials(this);
    }

    public override SecurityTokenManager CreateSecurityTokenManager()
    {
        if (UserNameAuthentication.UserNamePasswordValidationMode == UserNamePasswordValidationMode.Custom)
        {
            return new UserSecurityTokenManager(this);
        }
        return base.CreateSecurityTokenManager();
    }
}

internal class UserSecurityTokenManager : ServiceCredentialsSecurityTokenManager
{
    public UserSecurityTokenManager(UserServiceCredentials credentials) : base(credentials)
    {
    }

    public override SecurityTokenAuthenticator CreateSecurityTokenAuthenticator(SecurityTokenRequirement tokenRequirement,
        out SecurityTokenResolver outOfBandTokenResolver)
    {
        outOfBandTokenResolver = null;
        UserNamePasswordValidator validator = ServiceCredentials.UserNameAuthentication.CustomUserNamePasswordValidator;
        return new UserSecurityTokenAuthenticator(validator ?? new Validator());
    }
}

internal class UserSecurityTokenAuthenticator : CustomUserNameSecurityTokenAuthenticator
{
    public UserSecurityTokenAuthenticator(UserNamePasswordValidator validator) : base(validator)
    {
    }

    protected override ReadOnlyCollection<IAuthorizationPolicy> ValidateUserNamePasswordCore(string userName,
        string password)
    {
        ReadOnlyCollection<IAuthorizationPolicy> currentPolicies =
            base.ValidateUserNamePasswordCore(userName, password);
        List<IAuthorizationPolicy> policies = new List<IAuthorizationPolicy>(currentPolicies);
        policies.Add(new UserAuthorizationPolicy(userName, password));
        return policies.AsReadOnly();
    }
}

public class UserAuthorizationPolicy : IAuthorizationPolicy
{
    private string m_userName;
    private string m_password;

    //Called when used with service credentials
    public UserAuthorizationPolicy(string userName, string password)
    {
        m_userName = userName;
        m_password = password;
    }

    //Called when directly configured in the config file
    public UserAuthorizationPolicy()
    {
    }

    public ClaimSet Issuer {
        get;
    } = ClaimSet.System;

    public string Id {
        get;
    } = Guid.NewGuid().ToString();

    public bool Evaluate(EvaluationContext evaluationContext, ref object state)
    {
        bool hasIdentities = evaluationContext.Properties.TryGetValue("Identities", out object rawIdentities);
        if (rawIdentities is IList<IIdentity> identities)
        {
            var identityQry =
                from id in identities
                where String.Equals(id.Name, m_userName, StringComparison.OrdinalIgnoreCase)
                select id;
            IIdentity identity = identityQry.FirstOrDefault();
            if (identity == null)
            {
                return false;
            }
            UserIdentity userIdentity = new UserIdentity(identity, m_password);
            identities.Remove(identity);
            identities.Add(userIdentity);

            evaluationContext.Properties["PrimaryIdentity"] = userIdentity;
            evaluationContext.Properties["Principal"] = new GenericPrincipal(userIdentity, null);

            return true;
        }
        else
        {
            return false;
        }
    }
}

那 应用程序配置 我使用的是:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
    <system.serviceModel>
        <bindings>
            <webHttpBinding>
                <binding name="TestBinding">
                    <security mode="TransportCredentialOnly">
                        <transport clientCredentialType="Basic">
                        </transport>
                    </security>
                </binding>
            </webHttpBinding>
        </bindings>
        <behaviors>
            <serviceBehaviors>
                <behavior name="TestServiceBehavior">
                    <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="true"/>
                    <!-- Custom service credentials: Works when binding security is Transport. Is not invoked when security TransportCredentialOnly-->
                    <serviceCredentials type="WcfTestServices.UserServiceCredentials, WcfTestServices">
                        <userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType="WcfTestServices.Validator, WcfTestServices"/>
                    </serviceCredentials>
                    <serviceAuthorization principalPermissionMode="Custom">
                        <!-- Authorization policy works when binding security is TransportCredentialOnly, but has no password -->
                        <authorizationPolicies>
                            <add policyType="WcfTestServices.UserAuthorizationPolicy, WcfTestServices"/>
                        </authorizationPolicies>
                    </serviceAuthorization>
                </behavior>
            </serviceBehaviors>
            <endpointBehaviors>
                <behavior name="TestEndpointBehavior">
                    <webHttp/>
                </behavior>
            </endpointBehaviors>
        </behaviors>
        <services>
            <service name="WcfTestServices.TestService" behaviorConfiguration="TestServiceBehavior">
                <endpoint address="" binding="webHttpBinding"
                                    bindingConfiguration="TestBinding"
                                    behaviorConfiguration="TestEndpointBehavior"
                                    contract="WcfTestServices.ITestService"/>
                <host>
                    <baseAddresses>
                        <add baseAddress="http://localhost:12700/"/>
                    </baseAddresses>
                </host>
            </service>
        </services>
    </system.serviceModel>
</configuration>

有没有方法可以将密码信息转发给这个星座中的服务?我的首选解决方案是自定义 三、身份 但我愿意接受其他建议。