From 6d98d845766fc064b65d648d926cfa1da5369a80 Mon Sep 17 00:00:00 2001
From: HombreLaser <sebastian-440@live.com>
Date: Thu, 17 Nov 2022 21:36:57 -0600
Subject: Añadido el service TokenGenerator
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---
 Program.cs                  |  5 +++++
 Services/ITokenGenerator.cs |  8 ++++++++
 Services/TokenGenerator.cs  | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 52 insertions(+)
 create mode 100644 Services/ITokenGenerator.cs
 create mode 100644 Services/TokenGenerator.cs

diff --git a/Program.cs b/Program.cs
index 22bf80e..0bcd2cb 100644
--- a/Program.cs
+++ b/Program.cs
@@ -7,6 +7,7 @@ using System.Text.Json.Serialization;
 using System.Text;
 using Microsoft.EntityFrameworkCore;
 using BackendPIA.Models;
+using BackendPIA.Services;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -20,6 +21,10 @@ builder.Services.AddIdentity<UserAccount, IdentityRole>().AddEntityFrameworkStor
 // Automapper configuration.
 builder.Services.AddAutoMapper(typeof(Program));
 
+// Custom services configuration.
+builder.Services.AddSingleton<ITokenGenerator>(s => new TokenGenerator(builder.Configuration["Jwt:Key"]));
+// End of custom services configuration.
+
 // Swagger configuration.
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen(c => {
diff --git a/Services/ITokenGenerator.cs b/Services/ITokenGenerator.cs
new file mode 100644
index 0000000..3738f81
--- /dev/null
+++ b/Services/ITokenGenerator.cs
@@ -0,0 +1,8 @@
+using BackendPIA.Models;
+
+namespace BackendPIA.Services {
+    public interface ITokenGenerator {
+        public string Generate(UserAccount user, string role);
+        public string GenerateRefreshToken();
+    }
+}
\ No newline at end of file
diff --git a/Services/TokenGenerator.cs b/Services/TokenGenerator.cs
new file mode 100644
index 0000000..7d9d1ec
--- /dev/null
+++ b/Services/TokenGenerator.cs
@@ -0,0 +1,39 @@
+using Microsoft.IdentityModel.Tokens;
+using System.IdentityModel.Tokens.Jwt;
+using Microsoft.AspNetCore.Identity;
+using System.Text;
+using System.Security.Claims;
+using System.Security.Cryptography;
+using BackendPIA.Models;
+
+namespace BackendPIA.Services {
+    public class TokenGenerator : ITokenGenerator {
+        private readonly string _key;
+        public TokenGenerator(string key) {
+            _key = key;
+        }
+
+        public string Generate(UserAccount user, string role) {
+            var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_key));
+	        var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
+            var expiration = DateTime.UtcNow.AddMinutes(30);
+            //var issuer = _configuration["Jwt:Issuer"];
+            var claims = new List<Claim> {
+		        new Claim("sid", user.Id),
+		        new Claim("username", user.UserName),
+		        new Claim("email", user.Email),
+                new Claim("role", role)
+	        };
+            var descriptor = new JwtSecurityToken(issuer: null, audience: null, claims: claims, expires: expiration, signingCredentials: creds);
+
+            return new JwtSecurityTokenHandler().WriteToken(descriptor);
+        }
+
+        public string GenerateRefreshToken() {
+            byte[] random_number = new byte[16];
+            RandomNumberGenerator rng = RandomNumberGenerator.Create();
+            rng.GetBytes(random_number);
+            return string.Join("", random_number);
+        }
+    }
+}
\ No newline at end of file
-- 
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