OAuth Bearer令牌认证未通过签名验证

Question

我在令牌使用者上收到以下错误。解决该问题的任何帮助将不胜感激。谢谢。

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“ IDX10503：签名验证失败。

尝试过的键：'System.IdentityModel.Tokens.SymmetricSecurityKey'。捕获的异常：'System.InvalidOperationException：IDX10636：SignatureProviderFactory.CreateForVerifying返回密钥的空值：'System.IdentityModel.Tokens.SymmetricSecurityKey'，signatureAlgorithm：' http : //www.w3.org/2001/04/xmldsig-more#hmac -sha256 '。在System.IdentityModel.Tokens.JwtSecurityTokenHandler.ValidateSignature（String []，字节[]，字节[]签名，安全密钥，字符串算法）在Microsoft.IdentityModel.Logging.LogHelper.Throw（String message，Type exceptionType，EventLevel logLevel，Exception innerException）在System.IdentityModel.Tokens.JwtSecurityTokenHandler.ValidateSignature（String token，TokenValidationParametersvalidationParameters）中。令牌：“

OAuth服务器上的令牌生成代码

 using (var ctlr = new EntityController())
        {
            var authRepo = ctlr.GetAuthModelRepository();

            string clientId;

            ticket.Properties.Dictionary.TryGetValue(WebConstants.OwinContextProps.OAuthClientIdPropertyKey, out clientId);

            if (string.IsNullOrWhiteSpace(clientId))
            {
                throw new InvalidOperationException("AuthenticationTicket.Properties does not include audience");
            }


            //audience record
            var client = authRepo.FindAuthClientByOAuthClientID(clientId);

            var issued = ticket.Properties.IssuedUtc;
            var expires = ticket.Properties.ExpiresUtc;


            var hmac = new HMACSHA256(Convert.FromBase64String(client.Secret));
            var signingCredentials = new SigningCredentials(
                new InMemorySymmetricSecurityKey(hmac.Key),
                Algorithms.HmacSha256Signature, Algorithms.Sha256Digest);

            TokenValidationParameters validationParams =
                new TokenValidationParameters()
                {
                    ValidAudience = clientId,
                    ValidIssuer = _issuer,
                    ValidateLifetime = true,
                    ValidateAudience = true,
                    ValidateIssuer = true,
                    RequireSignedTokens = true,
                    RequireExpirationTime = true,
                    ValidateIssuerSigningKey = true,
                    IssuerSigningToken = new BinarySecretSecurityToken(hmac.Key)
                };

            var jwtHandler = new JwtSecurityTokenHandler();

            var jwt = new JwtSecurityToken(_issuer, clientId, ticket.Identity.Claims, issued.Value.UtcDateTime, expires.Value.UtcDateTime, signingCredentials);

            jwtOnTheWire = jwtHandler.WriteToken(jwt);

            SecurityToken validatedToken = null;
            jwtHandler.ValidateToken(jwtOnTheWire, validationParams,out validatedToken);
            if (validatedToken == null)
                return "token_validation_failed";

        }
        return jwtOnTheWire;

Owin Startup.cs中的令牌消费\验证ASP.Net 5 vNext网站

公共无效ConfigureServices（IServiceCollection服务）

services.ConfigureOAuthBearerAuthentication(config =>
        {

            //oauth validation
            var clientSecret = "not the real secret";

            var hmac = new HMACSHA256(Convert.FromBase64String(clientSecret));
            var signingCredentials = new SigningCredentials(
                new SymmetricSecurityKey(hmac.Key), Algorithms.HmacSha256Signature, Algorithms.Sha256Digest);

            config.TokenValidationParameters.ValidAudience = "myappname";
            config.TokenValidationParameters.ValidIssuer = "mydomain.com";
            config.TokenValidationParameters.RequireSignedTokens = true;
            config.TokenValidationParameters.RequireExpirationTime = true;
            config.TokenValidationParameters.ValidateLifetime = true;
            config.TokenValidationParameters.ValidateIssuerSigningKey = true;
            config.TokenValidationParameters.ValidateSignature = true;
            config.TokenValidationParameters.ValidateAudience = true;
            config.TokenValidationParameters.IssuerSigningKey = signingCredentials.SigningKey;
        });

公共无效配置（IApplicationBuilder应用）

app.UseOAuthBearerAuthentication(config =>
            {

                config.AuthenticationScheme = "Bearer";
                config.AutomaticAuthentication = true;
            });

Answer 1

我能够将自己的签名验证添加到TokenValidationParameters中，然后将传入的JWT Raw签名与此代码中的已编译签名进行了比较，如果匹配，则该签名有效。

为什么使用内置签名验证没有发生这种情况，这超出了我的范围，也许这是vNext Identity令牌框架beta 6中的一个可能的错误。

公共无效ConfigureServices（IServiceCollection服务）

config.TokenValidationParameters.SignatureValidator =
                delegate (string token, TokenValidationParameters parameters)
                {
                    var clientSecret = "not the real secret";

                    var jwt = new JwtSecurityToken(token);

                    var hmac = new HMACSHA256(Convert.FromBase64String(clientSecret));

                    var signingCredentials = new SigningCredentials(
                       new SymmetricSecurityKey(hmac.Key), SecurityAlgorithms.HmacSha256Signature, SecurityAlgorithms.Sha256Digest);

                    var signKey = signingCredentials.SigningKey as SymmetricSecurityKey;


                    var encodedData = jwt.EncodedHeader + "." + jwt.EncodedPayload;
                    var compiledSignature = Encode(encodedData, signKey.Key);

                    //Validate the incoming jwt signature against the header and payload of the token
                    if (compiledSignature != jwt.RawSignature)
                    {
                        throw new Exception("Token signature validation failed.");
                    }

                    return jwt;
                };

编码助手方法

 public string Encode(string input, byte[] key)
        {
            HMACSHA256 myhmacsha = new HMACSHA256(key);
            byte[] byteArray = Encoding.UTF8.GetBytes(input);
            MemoryStream stream = new MemoryStream(byteArray);
            byte[] hashValue = myhmacsha.ComputeHash(stream);
            return Base64UrlEncoder.Encode(hashValue);
        }