505 lines
19 KiB
C#
505 lines
19 KiB
C#
///
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/// Copyright (c) 2016-2021 Sensus Slovensko a.s.
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///
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using System;
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using System.Collections.Generic;
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using System.Security.Cryptography;
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using System.Text;
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using log4net;
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using Common;
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using SharedDatabase.Forms;
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using SharedDatabase.Resources;
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namespace SharedDatabase.Entities
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{
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public class User : IUser
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{
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static readonly ILog log = LogManager.GetLogger(typeof(User));
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public virtual int Id { get; protected set; }
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public virtual string UserName { get; set; } /// = name, alias, abbreviation
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public virtual string FullName { get; set; } /// = description
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public virtual string Tag { get; set; }
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public virtual int Number { get; set; }
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public virtual string Password { get; set; }
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public virtual string Password2 { get; set; }
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public virtual string Password3 { get; set; }
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public virtual string Password4 { get; set; }
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public virtual DateTime LastPwChange { get; set; }
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public virtual IList<Group> Groups { get; set; } //User can be a member of a list of groups
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private bool powerUser; /// true for built-in users, power users have full access even with empty Groups list
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public virtual bool IsPowerUser() { return powerUser; }
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private string legalizator; /// Not mapped to a database !!!, 2nd user entered in a logging dialog
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public virtual void SetLegalizator(string value) { legalizator = value; }
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public virtual string GetLegalizator() { return legalizator; }
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public User()
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{
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this.powerUser = false;
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Groups = new List<Group>();
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Number = 0;
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Tag = string.Empty;
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}
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public User(string userName, int number, bool powerUser)
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{
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UserName = userName;
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Number = number;
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this.powerUser = powerUser;
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Groups = new List<Group>();
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FullName = powerUser ? "Power User" : string.Empty;
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}
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public virtual void AddGroup(Group group)
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{
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Groups.Add(group);
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}
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/// <summary>
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/// All members are copied except of ID (so that NHibernate works properly).
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/// List of groups is empty.
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/// </summary>
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/// <param name="user"></param>
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/// <returns></returns>
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public virtual object Clone()
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{
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User newUser = new User(UserName, Number, false);
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newUser.FullName = FullName;
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newUser.Number = Number;
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newUser.Tag = Tag;
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newUser.Password = Password;
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newUser.LastPwChange = LastPwChange;
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return newUser;
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}
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public override string ToString()
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{
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return (UserName != null) ? UserName : Number.ToString();
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}
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/// ------------- Additional stuff not mapped into the database -------------
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/// <summary>
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/// Check whether user is a member of a group.
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/// </summary>
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/// <param name="groupId">Group GID</param>
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/// <returns>true is user is a member of the specified group</returns>
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public virtual bool IsMemberOf(GID groupId)
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{
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if (powerUser)
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{
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return true;
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}
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else if ((groupId >= 0) && (groupId < GID.NrOfGroups))
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{
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foreach (var g in Groups)
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{
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if (g.GID == groupId) return true;
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}
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}
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return false;
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}
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/// <summary>
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/// Check whether user is a member of any of specified groups.
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/// Returns true also when no groups are defined (groupIds = null).
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/// </summary>
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/// <param name="groupIds">An array of group GID-s or null (no membership required)</param>
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/// <returns>true if user is a member of any of specified groups</returns>
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public virtual bool IsMemberOf(GID[] groupIds)
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{
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if (groupIds == null || powerUser)
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{
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return true;
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}
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foreach (var gid in groupIds)
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{
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if ((gid >= 0) && (gid < GID.NrOfGroups))
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{
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/// for all group elements in User.Groups
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foreach (var grp in Groups)
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{
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/// element GID = parameter GroupId ?
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if (grp.GID == gid) return true;
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}
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}
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}
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return false;
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}
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/// <summary>
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/// Checks requirements on the password regardless of the password history
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/// </summary>
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/// <param name="password">Password</param>
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/// <returns>true when the password is OK</returns>
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public static bool IsPasswordMeetsRequirements(string password, out string explanation)
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{
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return Common.Utils.IsPasswordMeetsRequirements(password, out explanation);
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}
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/// <summary>
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/// Returns true when password was already used in the past
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/// </summary>
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/// <param name="passwordCandidate">Password</param>
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/// <returns>false when password is new, true when it was used in the past</returns>
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public virtual bool IsPasswordUsedInPast(string passwordCandidate)
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{
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string encryptedPW = EncryptedPassword(passwordCandidate);
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return (encryptedPW == Password) || (encryptedPW == Password2) || (encryptedPW == Password3);
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}
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/// <summary>
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/// Checks 'LastPwChange' and returns true when password expired
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/// </summary>
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/// <returns></ returns>
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public virtual bool IsPasswordExpired()
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{
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if (IsPowerUser() || IsMemberOf(GID.Administrators) || GlobalData.PasswdExpirationPeriodDays == 0)
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{
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/// Password cannot expirate for this user or this feature is disabled in Backup and Security options
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return false;
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}
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/// Password expiration time is 3 months
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return (DateTime.Now - LastPwChange > new TimeSpan(GlobalData.PasswdExpirationPeriodDays, 0, 0, 0));
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}
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/// <summary>
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/// Sets users password. It then will be encrypted.
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/// </summary>
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/// <param name="password">Password</param>
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public virtual void SetPassword(string password)
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{
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Password4 = Password3;
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Password3 = Password2;
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Password2 = Password;
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Password = EncryptedPassword(password);
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LastPwChange = DateTime.Now;
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}
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string EncryptedPassword(string password)
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{
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return Common.Utils.GetHash(password);
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}
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/// <summary>
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/// Verifies users password. Used by static bool Authorisation(...)
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/// </summary>
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/// <param name="password">Password</param>
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/// <returns>true if password is correct</returns>
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public virtual bool IsCorrectPassword(string password)
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{
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if (string.IsNullOrEmpty(password) && string.IsNullOrEmpty(Password))
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{
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/// Currently saved and verified passwords are both empty => return true
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return true;
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}
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return (Password == EncryptedPassword(password));
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}
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/// <summary>
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/// Authorization method: 'requiredGroupMembership' contains a list of required groups.
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/// Valid name and password and a mbership in any of theese goups grants access, Authorize(..) returns true.
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/// When requiredGroupMembership == null, no membership is required, only name and password must be valid.
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/// If the user is not authorized, the current user remains to be a current user and access rights were not
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/// risen to a higher level. If you require different behavior, use Unauthorize() before calling Authorize().
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/// </summary>
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/// <param name="userName">User name</param>
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/// <param name="password">Password</param>
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/// <param name="requiredGrupMembership"></param>
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/// <returns>true = authorized</returns>
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public virtual bool Authorize(string userName, string password, GID[] requiredGroupMembership)
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{
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if (Common.Utils.IsPowerUser(userName, password))
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{
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/// User is a power user => authorize
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GlobalData.CurrentUser = this;
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GlobalData.LastAuthorization = DateTime.Now;
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log.FatalFormat("Power user '{0}' authorized @level '{1}'", userName, requiredGroupMembership);
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return true;
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}
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if (UserName.ToLower() != userName.ToLower())
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{
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/// User name does not match => reject authorization
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return false;
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}
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return CompleteAuthorization(password, requiredGroupMembership);
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}
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/// <summary>
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/// Authorization method: 'requiredGroupMembership' contains a list of required groups.
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/// Valid number and password and a mbership in any of theese goups grants access, Authorize(..) returns true.
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/// When requiredGroupMembership == null, no membership is required, only number and password must be valid.
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/// If the user is not authorized, the current user remains to be a current user and access rights were not
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/// risen to a higher level. If you require different behavior, use Unauthorize() before calling Authorize().
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/// </summary>
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/// <param name="number">User ID number</param>
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/// <param name="password">Password</param>
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/// <param name="requiredGrupMembership"></param>
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/// <returns>true = authorized</returns>
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public virtual bool AuthorizeNumber(int number, string password, GID[] requiredGroupMembership)
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{
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if (Number != number)
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{
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/// User number does not match => reject authorization
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return false;
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}
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return CompleteAuthorization(password, requiredGroupMembership);
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}
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/// <summary>
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/// Authorization method: 'requiredGroupMembership' contains a list of required groups.
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/// Valid name and password and a mbership in any of theese goups grants access, Authorize(..) returns true.
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/// When requiredGroupMembership == null, no membership is required, only name and password must be valid.
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/// If the user is not authorized, the current user remains to be a current user and access rights were not
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/// risen to a higher level. If you require different behavior, use Unauthorize() before calling Authorize().
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/// </summary>
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/// <param name="fullName"></param>
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/// <param name="password"></param>
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/// <param name="requiredGrupMembership"></param>
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/// <returns>true = authorized</returns>
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public virtual bool AuthorizeFullName(string fullName, string password, GID[] requiredGroupMembership)
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{
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if (FullName.ToLower() != fullName.ToLower())
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{
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/// Full number does not match => reject authorization
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return false;
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}
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return CompleteAuthorization(password, requiredGroupMembership);
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}
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/// <summary>
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/// Verfy password, group membershit and password expiration time)
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/// </summary>
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/// <param name="password">Password</param>
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/// <param name="requiredGroupMembership">Required group membership</param>
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/// <returns>true = authorized</returns>
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bool CompleteAuthorization(string password, GID[] requiredGroupMembership)
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{
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if (!IsMemberOf(requiredGroupMembership) || !IsCorrectPassword(password))
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{
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/// Either group membership or password is not OK => reject authorization
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return false;
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}
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if (IsPasswordExpired())
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{
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/// Password expired => User has to change the password
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if (new PasswordChangeDlg(UserName).ShowDialog() != System.Windows.Forms.DialogResult.OK)
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{
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/// User did not change the password => reject authorization
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return false;
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}
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}
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/// All OK => complete authorization
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GlobalData.CurrentUser = this;
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GlobalData.LastAuthorization = DateTime.Now;
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log.FatalFormat("User '{0}' authorized @level '{1}'", UserName, requiredGroupMembership);
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return true;
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}
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/// <summary>
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/// Authorization method: 'requiredGroupMembership' contains a list of required groups.
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/// Valid TAG and a mbership in any of theese goups grants access, Authorize(..) returns true.
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/// When requiredGroupMembership == null, no membership is required, only the TAG must be valid.
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/// If the user is not authorized, the current user remains to be a current user and access rights were not
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/// risen to a higher level. If you require different behavior, use Unauthorize() before calling Authorize().
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/// </summary>
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/// <param name="tag">Tag (RFID, NFC, ... s/n)</param>
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/// <param name="requiredGrupMembership"></param>
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/// <returns>true = authorized</returns>
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public virtual bool AuthorizeTag(string tag, GID[] requiredGroupMembership)
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{
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if (Tag != tag)
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{
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/// Tag number does not match => reject authorization
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return false;
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}
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if (IsMemberOf(requiredGroupMembership))
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{
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/// Group membersip is OK _and_ password is OK => authorize
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GlobalData.CurrentUser = this;
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GlobalData.LastAuthorization = DateTime.Now;
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log.FatalFormat("User with Tag={0} authorized @level '{1}'", tag, requiredGroupMembership);
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return true;
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}
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else
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{
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/// Either group membership or password is not OK => reject authorization
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return false;
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}
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}
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/// <summary>
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/// Returns a 'User' with a given username from a database.
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/// </summary>
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/// <param name="username">User name for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User AuthorizeDummyUser(string username)
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{
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User user = new User();
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user.UserName = username;
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GlobalData.CurrentUser = user;
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return user;
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}
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/// <summary>
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/// Returns a 'User' with a given username from an ARBITRARY database.
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/// </summary>
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/// <param name="username">User name for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User LoadUserByName(string userName, DBSettings dbSettings)
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{
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if (dbSettings == null || string.IsNullOrEmpty(dbSettings.ConnectionString)) return null;
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UsersDB.DbType = dbSettings.DbType;
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UsersDB.ConnectionString = dbSettings.ConnectionString;
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return LoadUserByName(userName);
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}
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/// <summary>
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/// Returns a 'User' with a given username from the users database.
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/// </summary>
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/// <param name="username">User name for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User LoadUserByName(string userName)
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{
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IList<User> listOfUsers = UsersDB.CreateSession()
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.QueryOver<User>()
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.Where(x => (x.UserName == userName))
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.List();
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return (listOfUsers.Count > 0) ? listOfUsers[0] : null;
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}
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/// <summary>
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/// Returns a 'User' with a given full name from an ARBITRARY database.
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/// </summary>
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/// <param name="fullName">Full name for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User LoadUserByFullName(string fullName, DBSettings dbSettings)
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{
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if (dbSettings == null || string.IsNullOrEmpty(dbSettings.ConnectionString)) return null;
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UsersDB.DbType = dbSettings.DbType;
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UsersDB.ConnectionString = dbSettings.ConnectionString;
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return LoadUserByFullName(fullName);
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}
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/// <summary>
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/// Returns a 'User' with a given full name from the users database.
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/// </summary>
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/// <param name="fullName">Full name for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User LoadUserByFullName(string fullName)
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{
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IList<User> listOfUsers = UsersDB.CreateSession()
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.QueryOver<User>()
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.Where(x => (x.FullName == fullName))
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.List();
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return (listOfUsers.Count > 0) ? listOfUsers[0] : null;
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}
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/// <summary>
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/// Returns a 'User' with a given username from an ARBITRARY database.
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/// </summary>
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/// <param name="number">User ID number for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User LoadUserByNumber(int number, DBSettings dbSettings)
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{
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if (dbSettings == null || string.IsNullOrEmpty(dbSettings.ConnectionString)) return null;
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UsersDB.DbType = dbSettings.DbType;
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UsersDB.ConnectionString = dbSettings.ConnectionString;
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return LoadUserByNumber(number);
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}
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/// <summary>
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/// Returns a 'User' with a given username from the users database.
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/// </summary>
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/// <param name="number">User ID number for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User LoadUserByNumber(int number)
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{
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IList<User> listOfUsers = UsersDB.CreateSession()
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.QueryOver<User>()
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.Where(x => (x.Number == number))
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.List();
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return (listOfUsers.Count > 0) ? listOfUsers[0] : null;
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}
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/// <summary>
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/// Returns a 'User' with a given RFID/NFC tag s/n from an ARBITRARY database.
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/// </summary>
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/// <param name="tag">Tag of a user for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User LoadUserByTag(string tag, DBSettings dbSettings)
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{
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if (dbSettings == null || string.IsNullOrEmpty(dbSettings.ConnectionString)) return null;
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UsersDB.DbType = dbSettings.DbType;
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UsersDB.ConnectionString = dbSettings.ConnectionString;
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return LoadUserByTag(tag);
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}
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/// <summary>
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/// Returns a 'User' with a given RFID/NFC tag s/n from the users database.
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/// </summary>
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/// <param name="tag">Tag of a user for the query</param>
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/// <returns>reference to a 'User' (if it exists) or null</returns>
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public static User LoadUserByTag(string tag)
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{
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IList<User> listOfUsers = UsersDB.CreateSession()
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.QueryOver<User>()
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.Where(x => (x.Tag == tag))
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.List();
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return (listOfUsers.Count > 0) ? listOfUsers[0] : null;
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}
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/// <summary>
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/// returns an IList of all Users
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/// </summary>
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public static IList<User> GetAllUsers()
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{
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return UsersDB.CreateSession().QueryOver<User>().List();
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}
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/// <summary>
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/// Unauthorize, abandon current users authorization.
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/// </summary>
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public static void Unauthorize()
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{
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GlobalData.CurrentUser = null;
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GlobalData.LastAuthorization = DateTime.Now;
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}
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public virtual string ToEncodedStr()
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{
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return string.Format("{0}~{1}~{2}", UserName, FullName, legalizator);
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}
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}
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}
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