AMessanger-Server/AMessanger.Application/ApplicationExtensions.cs

using System.Text;
using AMessanger.Application.Settings;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.IdentityModel.Tokens;

namespace AMessanger.Application;

public static class ApplicationExtensions
{
    public static IServiceCollection AddAuth(this IServiceCollection services, IConfiguration configuration)
    {
        var jwtConf = configuration.GetSection(JwtSettings.SECTION_NAME);
        services.Configure<JwtSettings>(jwtConf);
        var settings = jwtConf.Get<JwtSettings>()!;

        services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
            .AddJwtBearer(options =>
            {
                options.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuer = true,
                    ValidateAudience = true,
                    ValidateLifetime = true,
                    ValidateIssuerSigningKey = true,

                    ValidIssuer = settings.Issuer,
                    ValidAudience = settings.Audience,
                    IssuerSigningKey = new SymmetricSecurityKey(
                        Encoding.UTF8.GetBytes(settings.Key)
                    )
                };
            });

        return services.AddAuthorization();
    }
}