IDX10603:算法:“HS256"要求 SecurityKey.KeySize 大于“128"位.KeySize 报告:'32'.参数名称:key.KeySize

问题描述

我只是在使用 Asp.Net Core Web API 并实现身份验证.我正在从 Angular 应用程序调用这个 API.但我总是收到如下错误.

I was just working with Asp.Net Core Web API, and implementing Authentication. And I am calling this API from an Angular Application. But I am always getting an error as below.

IDX10603:算法:HS256"要求 SecurityKey.KeySize 大于128"位.KeySize 报告:'32'.参数名称:key.KeySize

以下是我在 Startup.cs 文件中的 ConfigureServices 代码.

Below is my code for ConfigureServices in Startup.cs file.

public IServiceProvider ConfigureServices(IServiceCollection services)
            {
                services.AddDbContext<APIContext>(option => option.UseInMemoryDatabase("AngularApp"));

                services.AddCors(options => options.AddPolicy("Cors", builder =>
                {
                    builder.AllowAnyOrigin().
                    AllowAnyMethod().
                    AllowAnyHeader();
                }
                ));

                var signinKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("Secret phase"));

                services.AddAuthentication(options =>
                {
                    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
                }).AddJwtBearer(cfg =>
                {
                    cfg.RequireHttpsMetadata = false;
                    cfg.SaveToken = true;
                    cfg.TokenValidationParameters = new Microsoft.IdentityModel.Tokens.TokenValidationParameters()
                    {
                        IssuerSigningKey = signinKey,
                        ValidateAudience = false,
                        ValidateIssuer = false,
                        ValidateLifetime = false,
                        ValidateIssuerSigningKey = true,
                        ValidateActor = false,
                        ClockSkew = TimeSpan.Zero
                    };
                });
                services.AddMvc();

                var serviceProvider = services.BuildServiceProvider();
                return serviceProvider;
            }

我在我的控制器中使用 JwtPackage，如下所示.

And I am using JwtPackagein my controller as follows.

JwtPackage CreateJwtToken(User usr)
        {
            var signinKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("this is my custom Secret key for authnetication"));
            var signInCredentials = new SigningCredentials(signinKey, SecurityAlgorithms.HmacSha256);
            var claims = new Claim[] {
                new Claim(JwtRegisteredClaimNames.Sub,usr.Id)
            };
            var jwt = new JwtSecurityToken(claims: claims, signingCredentials: signInCredentials);
            var encodedJwt = new JwtSecurityTokenHandler().WriteToken(jwt);
            return new JwtPackage() { FirstName = usr.FirstName, Token = encodedJwt };
        }

你能帮我解决这个问题吗?谢谢.

Can you please help me to fix this issue? Thank you.

推荐答案

啊，这是我的错误，一个简单的错误.我没有为密钥名称提供足够的字符.

Ah, it was my mistake, a simple one. I was not providing enough characters for the secret key name.

我把我的登录密钥改成了这个，

I changed my signinkey to this one,

var signinKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("this is my custom Secret key for authnetication"));

来自，

var signinKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("Secret phase"));

这解决了我的问题，因为 SigningCredentials(signinKey, SecurityAlgorithms.HmacSha256) 行中的 HmacSha256 应该大于 128 位.总之，只要用一个长字符串作为key就行了.

That solved my issue, as the HmacSha256 in the line SigningCredentials(signinKey, SecurityAlgorithms.HmacSha256)should be greater than 128 bits. In short, just use a long string as the key.

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