ResetPassword.cs

using System;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Waher.Content;
using Waher.Events;
using Waher.IoTGateway;
using Waher.Security;
using Waher.Security.Users;
 
namespace Waher.Service.IoTBroker.Admin.Security
{
    public class ResetPassword : CommandRegEx
    {
        public ResetPassword()
            : base(@"^reset\s+password\s+(?'Name'[^\s]+)$")
        {
        }
 
        public override string Name => "Reset";
 
        public override async Task Execute(ChatState State, string[] Arguments, string OrgMessage, Match Details,
            ResponseCallbackHandler ResponseCallback)
        {
            string Name = Details.Groups["Name"].Value;
 
            IUser User0 = await Waher.Security.Users.Users.GetUser(Name, false)
                ?? throw new Exception("User not found.");
 
            User User = User0 as User
                ?? throw new Exception("User not editable.");
 
            string Password = Base64Url.Encode(Gateway.NextBytes(32));
            await ResponseCallback("Generating password: `" + Password + "`", string.Empty);
 
            User.PasswordHash = Convert.ToBase64String(Waher.Security.Users.Users.ComputeHash(Name, Password));
 
            await Persistence.Database.Update(User);
 
            Waher.Security.Users.Users.ClearCache();
 
            Log.Informational("Password changed via Chat-Admin.", User.UserName, State.To);
 
            await ResponseCallback("User updated: `" + Name + "`", string.Empty);
        }
 
        public override HelpItem[] GetHelp()
        {
            return new HelpItem[]
            {
                new HelpItem("reset password NAME", "Resets the password of an existing user with user name `NAME`.")
            };
        }
    }
}