GenericPrincipal.cs

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using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Security.Claims;
 
namespace System.Security.Principal;
 
public class GenericPrincipal : ClaimsPrincipal
{
    private readonly IIdentity m_identity;
 
    private readonly string[] m_roles;
 
    public override IIdentity Identity => m_identity;
 
    public GenericPrincipal(IIdentity identity, string[]? roles)
    {
        if (identity == null)
        {
            throw new ArgumentNullException("identity");
        }
        m_identity = identity;
        if (roles != null)
        {
            m_roles = (string[])roles.Clone();
        }
        else
        {
            m_roles = null;
        }
        AddIdentityWithRoles(m_identity, m_roles);
    }
 
    private void AddIdentityWithRoles(IIdentity identity, string[] roles)
    {
        ClaimsIdentity claimsIdentity2 = ((!(identity is ClaimsIdentity claimsIdentity)) ? new ClaimsIdentity(identity) : claimsIdentity.Clone());
        if (roles != null && roles.Length != 0)
        {
            List<Claim> list = new List<Claim>(roles.Length);
            foreach (string value in roles)
            {
                if (!string.IsNullOrWhiteSpace(value))
                {
                    list.Add(new Claim(claimsIdentity2.RoleClaimType, value, "http://www.w3.org/2001/XMLSchema#string", "LOCAL AUTHORITY", "LOCAL AUTHORITY", claimsIdentity2));
                }
            }
            claimsIdentity2.ExternalClaims.Add(list);
        }
        base.AddIdentity(claimsIdentity2);
    }
 
    public override bool IsInRole([NotNullWhen(true)] string? role)
    {
        if (role == null || m_roles == null)
        {
            return false;
        }
        for (int i = 0; i < m_roles.Length; i++)
        {
            if (string.Equals(m_roles[i], role, StringComparison.OrdinalIgnoreCase))
            {
                return true;
            }
        }
        return base.IsInRole(role);
    }
 
    private static IPrincipal GetDefaultInstance()
    {
        return new GenericPrincipal(new GenericIdentity(string.Empty), new string[1] { string.Empty });
    }
}