Question

我创建了一个带有OAuth令牌身份验证的Web API应用程序。当令牌服务器在与服务相同的应用程序上运行时，这没有问题。但是，我想将授权服务移动到自己的应用程序（VS项目）中，并将其用于我正在处理的几个Web API项目中。但是，当我将授权逻辑隔离到它自己的项目中时，原始服务不再将生成的令牌视为有效。我的问题是，一个Web API项目是否有可能为另一个Web API项目生成令牌以进行验证？这是我的授权服务和原始服务的OWIN启动代码

验证服务：

public void Configuration(IAppBuilder app)
    {
        // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=316888
        HttpConfiguration config = new HttpConfiguration();

        ConfigureOAuth(app);

        WebApiConfig.Register(config);
        app.UseWebApi(config);
        app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);
    }

    private void ConfigureOAuth(IAppBuilder app)
    {
        OAuthAuthorizationServerOptions OAuthServerOptions = new OAuthAuthorizationServerOptions()
        {
            AllowInsecureHttp = true,
            TokenEndpointPath = new PathString("/token"),
            AccessTokenExpireTimeSpan = TimeSpan.FromDays(1),
            Provider = new SimpleAuthorizationServerProvider()
        };

        // Token Generation
        app.UseOAuthAuthorizationServer(OAuthServerOptions);
        app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());
    }

原始服务：

public void Configuration(IAppBuilder app)
    {
        ConfigureOAuth(app);
        // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=316888
        HttpConfiguration config = new HttpConfiguration();

        config.SuppressDefaultHostAuthentication();
        config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));


        WebApiConfig.Register(config);

        app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);
        app.UseWebApi(config);
    }

    public void ConfigureOAuth(IAppBuilder app)
    {
        var oauthBearerOptions = new OAuthBearerAuthenticationOptions();
        app.UseOAuthBearerAuthentication(oauthBearerOptions);
    }

Answer 1

在我自己研究这个问题时偶然发现了这个问题。 TL; DR答案是使用machine.config文件中的machineKey属性生成令牌：如果要在多个服务器上托管，则需要覆盖它。

可以在web.config中重写MachineKey：

<system.web>
<machineKey validationKey="VALUE GOES HERE" 
            decryptionKey="VALUE GOES HERE" 
            validation="SHA1" 
            decryption="AES"/>
</system.web>

应在本地生成计算机密钥 - 使用在线服务不安全。 KB Article for generating keys

这里所有这些的原始参考http://bitoftech.net/2014/09/24/decouple-owin-authorization-server-resource-server-oauth-2-0-web-api

Answer 2

如果您不想使用MachineKey，这真是有点棘手，我希望它可以跨不同的服务器和用户使用，每台服务器具有唯一的MachineKey。

Data Protection provider across Asp.NET Core and Framework (generate password reset link)

我首先在ValidateAsync的帮助下实现自己的DataProtectionTokenProvider.cs，以获得ASP.NET Core Identity。该课程确实帮助我找到了解决方案。

https://github.com/aspnet/Identity/blob/master/src/Identity/DataProtectionTokenProvider.cs

使用SecurityStamp时，会从DataProtectorTokenProvider<TUser, TKey>生成令牌，但是很难深入挖掘。如果在单个服务器上更改Application Pool Identity时验证将失败，则表明实际的保护机制将如下所示：

System.Security.Cryptography.ProtectedData.Protect(userData, entropy, DataProtectionScope.CurrentUser);

考虑到所有站点都使用相同的Application Pool Identity也是可行的。也可以是DataProtectionProvider和protectionDescriptor "LOCAL=user"。

new DataProtectionProvider("LOCAL=user")

https://docs.microsoft.com/en-us/previous-versions/aspnet/dn613280(v%3dvs.108)

https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.dataprotector?view=netframework-4.7.2

https://docs.microsoft.com/en-us/uwp/api/windows.security.cryptography.dataprotection.dataprotectionprovider

在阅读有关DpapiDataProtectionProvider（DPAPI代表数据保护应用程序编程接口）时，描述如下：

用于提供源自以下内容的数据保护服务：数据保护API。当您进行数据保护时，它是最佳的选择应用程序不是由ASP.NET托管，并且所有进程都以 相同的域标识。

Create方法的用途描述为：

用于确保受保护数据的附加熵只能是出于正确目的未受保护。

https://docs.microsoft.com/en-us/previous-versions/aspnet/dn253784(v%3dvs.113)

鉴于此信息，我在尝试使用Microsoft提供的普通类方面没有前进的方向。

我最终实现了自己的IUserTokenProvider<TUser, TKey>，IDataProtectionProvider和IDataProtector来代替它。

我选择用证书实现IDataProtector，因为我可以相对容易地在服务器之间传输证书。我也可以通过运行网站的X509Store从Application Pool Identity进行选择，因此应用程序本身不会存储任何密钥。

public class CertificateProtectorTokenProvider<TUser, TKey> : IUserTokenProvider<TUser, TKey>
    where TUser : class, IUser<TKey>
    where TKey : IEquatable<TKey>
{
    private IDataProtector protector;

    public CertificateProtectorTokenProvider(IDataProtector protector)
    {
        this.protector = protector;
    }
    public virtual async Task<string> GenerateAsync(string purpose, UserManager<TUser, TKey> manager, TUser user)
    {
        if (user == null)
        {
            throw new ArgumentNullException(nameof(user));
        }
        var ms = new MemoryStream();
        using (var writer = new BinaryWriter(ms, new UTF8Encoding(false, true), true))
        {
            writer.Write(DateTimeOffset.UtcNow.UtcTicks);
            writer.Write(Convert.ToInt32(user.Id));
            writer.Write(purpose ?? "");
            string stamp = null;
            if (manager.SupportsUserSecurityStamp)
            {
                stamp = await manager.GetSecurityStampAsync(user.Id);
            }
            writer.Write(stamp ?? "");
        }
        var protectedBytes = protector.Protect(ms.ToArray());
        return Convert.ToBase64String(protectedBytes);
    }

    public virtual async Task<bool> ValidateAsync(string purpose, string token, UserManager<TUser, TKey> manager, TUser user)
    {
        try
        {
            var unprotectedData = protector.Unprotect(Convert.FromBase64String(token));
            var ms = new MemoryStream(unprotectedData);
            using (var reader = new BinaryReader(ms, new UTF8Encoding(false, true), true))
            {
                var creationTime = new DateTimeOffset(reader.ReadInt64(), TimeSpan.Zero);
                var expirationTime = creationTime + TimeSpan.FromDays(1);
                if (expirationTime < DateTimeOffset.UtcNow)
                {
                    return false;
                }

                var userId = reader.ReadInt32();
                var actualUser = await manager.FindByIdAsync(user.Id);
                var actualUserId = Convert.ToInt32(actualUser.Id);
                if (userId != actualUserId)
                {
                    return false;
                }
                var purp = reader.ReadString();
                if (!string.Equals(purp, purpose))
                {
                    return false;
                }
                var stamp = reader.ReadString();
                if (reader.PeekChar() != -1)
                {
                    return false;
                }

                if (manager.SupportsUserSecurityStamp)
                {
                    return stamp == await manager.GetSecurityStampAsync(user.Id);
                }
                return stamp == "";
            }
        }
        catch (Exception e)
        {
            // Do not leak exception
        }
        return false;
    }

    public Task NotifyAsync(string token, UserManager<TUser, TKey> manager, TUser user)
    {
        throw new NotImplementedException();
    }

    public Task<bool> IsValidProviderForUserAsync(UserManager<TUser, TKey> manager, TUser user)
    {
        throw new NotImplementedException();
    }
}

public class CertificateProtectionProvider : IDataProtectionProvider
{
    public IDataProtector Create(params string[] purposes)
    {
        return new CertificateDataProtector(purposes);
    }
}

public class CertificateDataProtector : IDataProtector
{
    private readonly string[] _purposes;

    private X509Certificate2 cert;

    public CertificateDataProtector(string[] purposes)
    {
        _purposes = purposes;
        X509Store store = null;

        store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
        store.Open(OpenFlags.OpenExistingOnly | OpenFlags.ReadOnly);

        var certificateThumbprint = ConfigurationManager.AppSettings["CertificateThumbprint"].ToUpper();

        cert = store.Certificates.Cast<X509Certificate2>()
            .FirstOrDefault(x => x.GetCertHashString()
                .Equals(certificateThumbprint, StringComparison.InvariantCultureIgnoreCase));
    }

    public byte[] Protect(byte[] userData)
    {
        using (RSA rsa = cert.GetRSAPrivateKey())
        {
            // OAEP allows for multiple hashing algorithms, what was formermly just "OAEP" is
            // now OAEP-SHA1.
            return rsa.Encrypt(userData, RSAEncryptionPadding.OaepSHA1);
        }
    }

    public byte[] Unprotect(byte[] protectedData)
    {
        // GetRSAPrivateKey returns an object with an independent lifetime, so it should be
        // handled via a using statement.
        using (RSA rsa = cert.GetRSAPrivateKey())
        {
            return rsa.Decrypt(protectedData, RSAEncryptionPadding.OaepSHA1);
        }
    }
}

客户网站重置：

var provider = new CertificateProtectionProvider();
var protector = provider.Create("ResetPassword");

userManager.UserTokenProvider = new CertificateProtectorTokenProvider<ApplicationUser, int>(protector);

if (!await userManager.UserTokenProvider.ValidateAsync("ResetPassword", model.Token, UserManager, user))
{
    return GetErrorResult(IdentityResult.Failed());
}

var result = await userManager.ResetPasswordAsync(user.Id, model.Token, model.NewPassword);

后台：

var createdUser = userManager.FindByEmail(newUser.Email);

var provider = new CertificateProtectionProvider();
var protector = provider.Create("ResetPassword");

userManager.UserTokenProvider = new CertificateProtectorTokenProvider<ApplicationUser, int>(protector);
var token = userManager.GeneratePasswordResetToken(createdUser.Id);

有关常规DataProtectorTokenProvider<TUser, TKey>的工作原理的更多信息：

https://stackoverflow.com/a/53390287/3850405

跨两个Web API项目共享OAuth令牌

2 个答案: