IdentityServerTools.cs

// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.


using IdentityServer7.Models;
using Microsoft.AspNetCore.Http;
using System.Collections.Generic;
using System.Threading.Tasks;
using IdentityServer7.Extensions;
using System.Security.Claims;
using IdentityServer7.Services;
using IdentityModel;
using System;
using Microsoft.AspNetCore.Authentication;

namespace IdentityServer7
{
    /// <summary>
    /// Class for useful helpers for interacting with IdentityServer
    /// </summary>
    public class IdentityServerTools
    {
        internal readonly IHttpContextAccessor ContextAccessor;
        private readonly ITokenCreationService _tokenCreation;
        private readonly ISystemClock _clock;

        /// <summary>
        /// Initializes a new instance of the <see cref="IdentityServerTools" /> class.
        /// </summary>
        /// <param name="contextAccessor">The context accessor.</param>
        /// <param name="tokenCreation">The token creation service.</param>
        /// <param name="clock">The clock.</param>
        public IdentityServerTools(IHttpContextAccessor contextAccessor, ITokenCreationService tokenCreation, ISystemClock clock)
        {
            ContextAccessor = contextAccessor;
            _tokenCreation = tokenCreation;
            _clock = clock;
        }

        /// <summary>
        /// Issues a JWT.
        /// </summary>
        /// <param name="lifetime">The lifetime.</param>
        /// <param name="claims">The claims.</param>
        /// <returns></returns>
        /// <exception cref="System.ArgumentNullException">claims</exception>
        public virtual async Task<string> IssueJwtAsync(int lifetime, IEnumerable<Claim> claims)
        {
            if (claims == null) throw new ArgumentNullException(nameof(claims));

            var issuer = ContextAccessor.HttpContext.GetIdentityServerIssuerUri();

            var token = new Token
            {
                CreationTime = _clock.UtcNow.UtcDateTime,
                Issuer = issuer,
                Lifetime = lifetime,

                Claims = new HashSet<Claim>(claims, new ClaimComparer())
            };

            return await _tokenCreation.CreateTokenAsync(token);
        }

        /// <summary>
        /// Issues a JWT.
        /// </summary>
        /// <param name="lifetime">The lifetime.</param>
        /// <param name="issuer">The issuer.</param>
        /// <param name="claims">The claims.</param>
        /// <returns></returns>
        /// <exception cref="System.ArgumentNullException">claims</exception>
        public virtual async Task<string> IssueJwtAsync(int lifetime, string issuer, IEnumerable<Claim> claims)
        {
            if (String.IsNullOrWhiteSpace(issuer)) throw new ArgumentNullException(nameof(issuer));
            if (claims == null) throw new ArgumentNullException(nameof(claims));

            var token = new Token
            {
                CreationTime = _clock.UtcNow.UtcDateTime,
                Issuer = issuer,
                Lifetime = lifetime,

                Claims = new HashSet<Claim>(claims, new ClaimComparer())
            };

            return await _tokenCreation.CreateTokenAsync(token);
        }
    }
}