我正在寻找设置 Web API 服务器的最简单方法，该服务器使用 JWT 在 ASP.NET Core(又名 ASP.NET 5)中进行身份验证。这个项目( blog post/github )完全符合我的要求，但它使用 ASP.NET 4。

我只想能够:

最佳答案

注意/更新:

以下代码适用于 .NET Core 1.1
由于 .NET Core 1 非常 RTM，身份验证随着从 .NET Core 1 到 2.0 的跳跃而改变(也就是[部分？] 修复了重大更改)。
这就是为什么下面的代码不再适用于 .NET Core 2.0。
但它仍然是一个有用的阅读。

2018 更新

同时，您可以找到 ASP.NET Core 2.0 JWT-Cookie-Authentication on my github test repo 的工作示例.
随附带有 BouncyCaSTLe 的 MS-RSA&MS-ECDSA 抽象类的实现，以及 RSA&ECDSA 的 key 生成器。

死灵法术。
我深入研究了 JWT。以下是我的发现:

您需要添加 Microsoft.AspNetCore.Authentication.JwtBearer

然后你可以设置

app.UseJwtBearerAuthentication(bearerOptions);

var bearerOptions = new JwtBearerOptions()
{
    AutomaticAuthenticate = true,
    AutomaticChallenge = true,
    TokenValidationParameters = tokenValidationParameters,
    Events = new CustomBearerEvents()
};

// Optional 
// bearerOptions.SecurityTokenValidators.Clear();
// bearerOptions.SecurityTokenValidators.Add(new MyTokenHandler());

// https://github.com/aspnet/Security/blob/master/src/Microsoft.AspNetCore.Authentication.JwtBearer/Events/JwtBearerEvents.cs
public class CustomBearerEvents : Microsoft.AspNetCore.Authentication.JwtBearer.IJwtBearerEvents
{

    /// <summary>
    /// Invoked if exceptions are thrown during request processing. The exceptions will be re-thrown after this event unless suppressed.
    /// </summary>
    public Func<AuthenticationFailedContext, Task> OnAuthenticationFailed { get; set; } = context => Task.FromResult(0);

    /// <summary>
    /// Invoked when a protocol message is first received.
    /// </summary>
    public Func<MessageReceivedContext, Task> OnMessageReceived { get; set; } = context => Task.FromResult(0);

    /// <summary>
    /// Invoked after the security token has passed validation and a ClaimsIdentity has been generated.
    /// </summary>
    public Func<TokenValidatedContext, Task> OnTokenValidated { get; set; } = context => Task.FromResult(0);


    /// <summary>
    /// Invoked before a challenge is sent back to the caller.
    /// </summary>
    public Func<JwtBearerChallengeContext, Task> OnChallenge { get; set; } = context => Task.FromResult(0);


    Task IJwtBearerEvents.AuthenticationFailed(AuthenticationFailedContext context)
    {
        return OnAuthenticationFailed(context);
    }

    Task IJwtBearerEvents.Challenge(JwtBearerChallengeContext context)
    {
        return OnChallenge(context);
    }

    Task IJwtBearerEvents.MessageReceived(MessageReceivedContext context)
    {
        return OnMessageReceived(context);
    }

    Task IJwtBearerEvents.TokenValidated(TokenValidatedContext context)
    {
        return OnTokenValidated(context);
    }
}

var tokenValidationParameters = new Microsoft.IdentityModel.Tokens.TokenValidationParameters
{
    // The signing key must match!
    ValidateIssuerSigningKey = true,
    IssuerSigningKey = signingKey,

    // Validate the JWT Issuer (iss) claim
    ValidateIssuer = true,
    ValidIssuer = "ExampleIssuer",

    // Validate the JWT Audience (aud) claim
    ValidateAudience = true,
    ValidAudience = "ExampleAudience",

    // Validate the token expiry
    ValidateLifetime = true,

    // If you want to allow a certain amount of clock drift, set that here:
    ClockSkew = TimeSpan.Zero, 
};

// https://gist.github.com/pmhsfelix/4151369
public class MyTokenHandler : Microsoft.IdentityModel.Tokens.ISecurityTokenValidator
{
    private int m_MaximumTokenByteSize;

    public MyTokenHandler()
    { }

    bool ISecurityTokenValidator.CanValidateToken
    {
        get
        {
            // throw new NotImplementedException();
            return true;
        }
    }



    int ISecurityTokenValidator.MaximumTokenSizeInBytes
    {
        get
        {
            return this.m_MaximumTokenByteSize;
        }

        set
        {
            this.m_MaximumTokenByteSize = value;
        }
    }

    bool ISecurityTokenValidator.CanReadToken(string securityToken)
    {
        System.Console.WriteLine(securityToken);
        return true;
    }

    ClaimsPrincipal ISecurityTokenValidator.ValidateToken(string securityToken, TokenValidationParameters validationParameters, out SecurityToken validatedToken)
    {
        JwtSecurityTokenHandler tokenHandler = new JwtSecurityTokenHandler();
        // validatedToken = new JwtSecurityToken(securityToken);
        try
        {

            tokenHandler.ValidateToken(securityToken, validationParameters, out validatedToken);
            validatedToken = new JwtSecurityToken("jwtEncodedString");
        }
        catch (Exception ex)
        {
            System.Console.WriteLine(ex.Message);
            throw;
        }



        ClaimsPrincipal principal = null;
        // SecurityToken validToken = null;

        validatedToken = null;


        System.Collections.Generic.List<System.Security.Claims.Claim> ls =
            new System.Collections.Generic.List<System.Security.Claims.Claim>();

        ls.Add(
            new System.Security.Claims.Claim(
                System.Security.Claims.ClaimTypes.Name, "IcanHazUsr_éèêëïàáâäåãæóòôöõõúùûüñçø_ÉÈÊËÏÀÁÂÄÅÃÆÓÒÔÖÕÕÚÙÛÜÑÇØ 你好，世界 Привет\tмир"
            , System.Security.Claims.ClaimValueTypes.String
            )
        );

        // 

        System.Security.Claims.ClaimsIdentity id = new System.Security.Claims.ClaimsIdentity("authenticationType");
        id.AddClaims(ls);

        principal = new System.Security.Claims.ClaimsPrincipal(id);

        return principal;
        throw new NotImplementedException();
    }


}

// System.Security.Cryptography.X509Certificates.X509Certificate2 cert2 = new System.Security.Cryptography.X509Certificates.X509Certificate2(byte[] rawData);
System.Security.Cryptography.X509Certificates.X509Certificate2 cert2 = 
    DotNetUtilities.CreateX509Cert2("mycert");
Microsoft.IdentityModel.Tokens.SecurityKey secKey = new X509SecurityKey(cert2);

    // http://stackoverflow.com/questions/36942094/how-can-i-generate-a-self-signed-cert-without-using-obsolete-bouncycastle-1-7-0
    public static System.Security.Cryptography.X509Certificates.X509Certificate2 CreateX509Cert2(string certName)
    {

        var keypairgen = new Org.BouncyCastle.Crypto.Generators.RsaKeyPairGenerator();
        keypairgen.Init(new Org.BouncyCastle.Crypto.KeyGenerationParameters(
            new Org.BouncyCastle.Security.SecureRandom(
                new Org.BouncyCastle.Crypto.Prng.CryptoApiRandomGenerator()
                )
                , 1024
                )
        );

        Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair keypair = keypairgen.GenerateKeyPair();

        // --- Until here we generate a keypair



        var random = new Org.BouncyCastle.Security.SecureRandom(
                new Org.BouncyCastle.Crypto.Prng.CryptoApiRandomGenerator()
        );


        // SHA1WITHRSA
        // SHA256WITHRSA
        // SHA384WITHRSA
        // SHA512WITHRSA

        // SHA1WITHECDSA
        // SHA224WITHECDSA
        // SHA256WITHECDSA
        // SHA384WITHECDSA
        // SHA512WITHECDSA

        Org.BouncyCastle.Crypto.ISignatureFactory signatureFactory = 
            new Org.BouncyCastle.Crypto.Operators.Asn1SignatureFactory("SHA512WITHRSA", keypair.Private, random)
        ;



        var gen = new Org.BouncyCastle.X509.X509V3CertificateGenerator();


        var CN = new Org.BouncyCastle.Asn1.X509.X509Name("CN=" + certName);
        var SN = Org.BouncyCastle.Math.BigInteger.ProbablePrime(120, new Random());

        gen.SetSerialNumber(SN);
        gen.SetSubjectDN(CN);
        gen.SetIssuerDN(CN);
        gen.SetNotAfter(DateTime.Now.AddYears(1));
        gen.SetNotBefore(DateTime.Now.Subtract(new TimeSpan(7, 0, 0, 0)));
        gen.SetPublicKey(keypair.Public);


        // -- Are these necessary ? 

        // public static readonly DerObjectIdentifier AuthorityKeyIdentifier = new DerObjectIdentifier("2.5.29.35");
        // OID value: 2.5.29.35
        // OID description: id-ce-authorityKeyIdentifier
        // This extension may be used either as a certificate or CRL extension. 
        // It identifies the public key to be used to verify the signature on this certificate or CRL.
        // It enables distinct keys used by the same CA to be distinguished (e.g., as key updating occurs).


        // http://stackoverflow.com/questions/14930381/generating-x509-certificate-using-bouncy-castle-java
        gen.AddExtension(
        Org.BouncyCastle.Asn1.X509.X509Extensions.AuthorityKeyIdentifier.Id,
        false,
        new Org.BouncyCastle.Asn1.X509.AuthorityKeyIdentifier(
            Org.BouncyCastle.X509.SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(keypair.Public),
            new Org.BouncyCastle.Asn1.X509.GeneralNames(new Org.BouncyCastle.Asn1.X509.GeneralName(CN)),
            SN
        ));

        // OID value: 1.3.6.1.5.5.7.3.1
        // OID description: Indicates that a certificate can be used as an SSL server certificate.
        gen.AddExtension(
            Org.BouncyCastle.Asn1.X509.X509Extensions.ExtendedKeyUsage.Id,
            false,
            new Org.BouncyCastle.Asn1.X509.ExtendedKeyUsage(new ArrayList()
            {
            new Org.BouncyCastle.Asn1.DerObjectIdentifier("1.3.6.1.5.5.7.3.1")
        }));

        // -- End are these necessary ? 

        Org.BouncyCastle.X509.X509Certificate bouncyCert = gen.Generate(signatureFactory);

        byte[] ba = bouncyCert.GetEncoded();
        System.Security.Cryptography.X509Certificates.X509Certificate2 msCert = new System.Security.Cryptography.X509Certificates.X509Certificate2(ba);
        return msCert;
    }

app.UseCookieAuthentication(new CookieAuthenticationOptions()
{
    AuthenticationScheme = "MyCookieMiddlewareInstance",
    CookieName = "SecurityByObscurityDoesntWork",
    ExpireTimeSpan = new System.TimeSpan(15, 0, 0),
    LoginPath = new Microsoft.AspNetCore.Http.PathString("/Account/Unauthorized/"),
    AccessDeniedPath = new Microsoft.AspNetCore.Http.PathString("/Account/Forbidden/"),
    AutomaticAuthenticate = true,
    AutomaticChallenge = true,
    CookieSecure = Microsoft.AspNetCore.Http.CookieSecurePolicy.SameAsRequest,
    CookieHttpOnly = false,
    TicketDataFormat = new CustomJwtDataFormat("foo", tokenValidationParameters)

    // DataProtectionProvider = null,

    // DataProtectionProvider = new DataProtectionProvider(new System.IO.DirectoryInfo(@"c:\shared-auth-ticket-keys\"),
    //delegate (DataProtectionConfiguration options)
    //{
    //    var op = new Microsoft.AspNet.DataProtection.AuthenticatedEncryption.AuthenticatedEncryptionOptions();
    //    op.EncryptionAlgorithm = Microsoft.AspNet.DataProtection.AuthenticatedEncryption.EncryptionAlgorithm.AES_256_GCM:
    //    options.UseCryptographicAlgorithms(op);
    //}
    //),
});

public class CustomJwtDataFormat : ISecureDataFormat<AuthenticationTicket>
{

    private readonly string algorithm;
    private readonly TokenValidationParameters validationParameters;

    public CustomJwtDataFormat(string algorithm, TokenValidationParameters validationParameters)
    {
        this.algorithm = algorithm;
        this.validationParameters = validationParameters;
    }



    // This ISecureDataFormat implementation is decode-only
    string ISecureDataFormat<AuthenticationTicket>.Protect(AuthenticationTicket data)
    {
        return MyProtect(data, null);
    }

    string ISecureDataFormat<AuthenticationTicket>.Protect(AuthenticationTicket data, string purpose)
    {
        return MyProtect(data, purpose);
    }

    AuthenticationTicket ISecureDataFormat<AuthenticationTicket>.Unprotect(string protectedText)
    {
        return MyUnprotect(protectedText, null);
    }

    AuthenticationTicket ISecureDataFormat<AuthenticationTicket>.Unprotect(string protectedText, string purpose)
    {
        return MyUnprotect(protectedText, purpose);
    }


    private string MyProtect(AuthenticationTicket data, string purpose)
    {
        return "wadehadedudada";
        throw new System.NotImplementedException();
    }


    // http://blogs.microsoft.co.il/sasha/2012/01/20/aggressive-inlining-in-the-clr-45-jit/
    [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
    private AuthenticationTicket MyUnprotect(string protectedText, string purpose)
    {
        JwtSecurityTokenHandler handler = new JwtSecurityTokenHandler();
        ClaimsPrincipal principal = null;
        SecurityToken validToken = null;


        System.Collections.Generic.List<System.Security.Claims.Claim> ls = 
            new System.Collections.Generic.List<System.Security.Claims.Claim>();

        ls.Add(
            new System.Security.Claims.Claim(
                System.Security.Claims.ClaimTypes.Name, "IcanHazUsr_éèêëïàáâäåãæóòôöõõúùûüñçø_ÉÈÊËÏÀÁÂÄÅÃÆÓÒÔÖÕÕÚÙÛÜÑÇØ 你好，世界 Привет\tмир"
            , System.Security.Claims.ClaimValueTypes.String
            )
        );

        // 

        System.Security.Claims.ClaimsIdentity id = new System.Security.Claims.ClaimsIdentity("authenticationType");
        id.AddClaims(ls);

        principal = new System.Security.Claims.ClaimsPrincipal(id);
        return new AuthenticationTicket(principal, new AuthenticationProperties(), "MyCookieMiddlewareInstance");


        try
        {
            principal = handler.ValidateToken(protectedText, this.validationParameters, out validToken);

            JwtSecurityToken validJwt = validToken as JwtSecurityToken;

            if (validJwt == null)
            {
                throw new System.ArgumentException("Invalid JWT");
            }

            if (!validJwt.Header.Alg.Equals(algorithm, System.StringComparison.Ordinal))
            {
                throw new System.ArgumentException($"Algorithm must be '{algorithm}'");
            }

            // Additional custom validation of JWT claims here (if any)
        }
        catch (SecurityTokenValidationException)
        {
            return null;
        }
        catch (System.ArgumentException)
        {
            return null;
        }

        // Validation passed. Return a valid AuthenticationTicket:
        return new AuthenticationTicket(principal, new AuthenticationProperties(), "MyCookieMiddlewareInstance");
    }


}

// https://github.com/aspnet/Security/blob/master/src/Microsoft.AspNetCore.Authentication.JwtBearer/Events/IJwtBearerEvents.cs
// http://codereview.stackexchange.com/questions/45974/web-api-2-authentication-with-jwt
public class TokenMaker
{

    class SecurityConstants
    {
        public static string TokenIssuer;
        public static string TokenAudience;
        public static int TokenLifetimeMinutes;
    }


    public static string IssueToken()
    {
        SecurityKey sSKey = null;

        var claimList = new List<Claim>()
        {
            new Claim(ClaimTypes.Name, "userName"),
            new Claim(ClaimTypes.Role, "role")     //Not sure what this is for
        };

        JwtSecurityTokenHandler tokenHandler = new JwtSecurityTokenHandler();
        SecurityTokenDescriptor desc = makeSecurityTokenDescriptor(sSKey, claimList);

        // JwtSecurityToken tok = tokenHandler.CreateJwtSecurityToken(desc);
        return tokenHandler.CreateEncodedJwt(desc);
    }


    public static ClaimsPrincipal ValidateJwtToken(string jwtToken)
    {
        SecurityKey sSKey = null;
        var tokenHandler = new JwtSecurityTokenHandler();

        // Parse JWT from the Base64UrlEncoded wire form 
        //(<Base64UrlEncoded header>.<Base64UrlEncoded body>.<signature>)
        JwtSecurityToken parsedJwt = tokenHandler.ReadToken(jwtToken) as JwtSecurityToken;

        TokenValidationParameters validationParams =
            new TokenValidationParameters()
            {
                RequireExpirationTime = true,
                ValidAudience = SecurityConstants.TokenAudience,
                ValidIssuers = new List<string>() { SecurityConstants.TokenIssuer },
                ValidateIssuerSigningKey = true,
                ValidateLifetime = true,
                IssuerSigningKey = sSKey,

            };

        SecurityToken secT;
        return tokenHandler.ValidateToken("token", validationParams, out secT);
    }


    private static SecurityTokenDescriptor makeSecurityTokenDescriptor(SecurityKey sSKey, List<Claim> claimList)
    {
        var now = DateTime.UtcNow;
        Claim[] claims = claimList.ToArray();
        return new Microsoft.IdentityModel.Tokens.SecurityTokenDescriptor
        {
            Subject = new ClaimsIdentity(claims),
            Issuer = SecurityConstants.TokenIssuer,
            Audience = SecurityConstants.TokenAudience,
            IssuedAt = System.DateTime.UtcNow,
            Expires = System.DateTime.UtcNow.AddMinutes(SecurityConstants.TokenLifetimeMinutes),
            NotBefore = System.DateTime.UtcNow.AddTicks(-1),

            SigningCredentials = new SigningCredentials(sSKey, Microsoft.IdentityModel.Tokens.SecurityAlgorithms.EcdsaSha512Signature)
        };



    }

}

var payload = new Dictionary<string, object>()
{
    { "claim1", 0 },
    { "claim2", "claim2-value" }
};
var secretKey = "GQDstcKsx0NHjPOuXOYg5MbeJ1XT0uFiwDVvVBrk";
string token = JWT.JsonWebToken.Encode(payload, secretKey, JWT.JwtHashAlgorithm.HS256);
Console.WriteLine(token);

var token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJjbGFpbTEiOjAsImNsYWltMiI6ImNsYWltMi12YWx1ZSJ9.8pwBI_HtXqI3UgQHQ_rDRnSQRxFL1SR8fbQoS-5kM5s";
var secretKey = "GQDstcKsx0NHjPOuXOYg5MbeJ1XT0uFiwDVvVBrk";
try
{
    string jsonPayload = JWT.JsonWebToken.Decode(token, secretKey);
    Console.WriteLine(jsonPayload);
}
catch (JWT.SignatureVerificationException)
{
    Console.WriteLine("Invalid token!");
}

namespace BouncyJWT
{


    public class JwtKey
    {
        public byte[] MacKeyBytes;
        public Org.BouncyCastle.Crypto.AsymmetricKeyParameter RsaPrivateKey;
        public Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters EcPrivateKey;


        public string MacKey
        {
            get { return System.Text.Encoding.UTF8.GetString(this.MacKeyBytes); }
            set { this.MacKeyBytes = System.Text.Encoding.UTF8.GetBytes(value); }
        }


        public JwtKey()
        { }

        public JwtKey(string macKey)
        {
            this.MacKey = macKey;
        }

        public JwtKey(byte[] macKey)
        {
            this.MacKeyBytes = macKey;
        }

        public JwtKey(Org.BouncyCastle.Crypto.AsymmetricKeyParameter rsaPrivateKey)
        {
            this.RsaPrivateKey = rsaPrivateKey;
        }

        public JwtKey(Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters ecPrivateKey)
        {
            this.EcPrivateKey = ecPrivateKey;
        }
    }


}

关于c# - ASP.NET Core 1.0 Web API 中的简单 JWT 身份验证，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35307143/