Site.cs :  » 2.6.4-mono-.net-core » System.Security » System » Security » Policy » C# / CSharp Open Source

//
// System.Security.Policy.Site.cs
//
// Authors
//  Duncan Mak (duncan@ximian.com)
//  Sebastien Pouliot  <sebastien@ximian.com>
//
// (C) 2003 Ximian, Inc (http://www.ximian.com)
// Portions (C) 2004 Motus Technologies Inc. (http://www.motus.com)
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.Globalization;
using System.Security.Permissions;
using System.Runtime.InteropServices;

using Mono.Security;

namespace System.Security.Policy{

  [Serializable]
  [ComVisible (true)]
  public sealed class Site: IIdentityPermissionFactory, IBuiltInEvidence {

    internal string origin_site;

    public Site (string name)
    {
      if (name == null)
        throw new ArgumentNullException ("url");
      if (!IsValid (name))
        throw new ArgumentException (Locale.GetText ("name is not valid"));
      
      origin_site = name;
                }

                public static Site CreateFromUrl (string url)
                {
      if (url == null)
        throw new ArgumentNullException ("url");
      if (url.Length == 0)
        throw new FormatException (Locale.GetText ("Empty URL."));

      string site = UrlToSite (url);
      if (site == null) {
        string msg = String.Format (Locale.GetText ("Invalid URL '{0}'."), url);
        throw new ArgumentException (msg, "url");
      }

                        return new Site (site);
                }

                public object Copy ()
                {
                        return new Site (origin_site);
                }

                public IPermission CreateIdentityPermission (Evidence evidence)
                {
                        return new SiteIdentityPermission (origin_site);
                }

                public override bool Equals (object o)
                {
      Site s = (o as System.Security.Policy.Site);
      if (s == null)
        return false;
      return (String.Compare (s.Name, origin_site, true, CultureInfo.InvariantCulture) == 0);
                }

                public override int GetHashCode ()
                {
                        return origin_site.GetHashCode ();
                }

                public override string ToString ()
                {
      SecurityElement element = new SecurityElement ("System.Security.Policy.Site");
      element.AddAttribute ("version", "1");
      element.AddChild (new SecurityElement ("Name", origin_site));
      return element.ToString ();
                }

    // properties

                public string Name {
                        get { return origin_site; }
                }

    // interface IBuiltInEvidence

    int IBuiltInEvidence.GetRequiredSize (bool verbose) 
    {
      return (verbose ? 3 : 1) + origin_site.Length;
    }

    [MonoTODO ("IBuiltInEvidence")]
    int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position) 
    {
      return 0;
    }

    [MonoTODO ("IBuiltInEvidence")]
    int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose) 
    {
      return 0;
    }

    // internals

                internal static bool IsValid (string name)
                {
      if (name == String.Empty)
        return false;
      if ((name.Length == 1) && (name == "."))    // split would remove .
        return false;

      string [] parts = name.Split ('.');
      for (int i=0; i < parts.Length; i++) {
        string part = parts [i];
        if ((i == 0) && (part == "*"))      // * (only in first part)
          continue;
        foreach (char c in part) {
          int x = Convert.ToInt32 (c);
          bool result = ((x == 33) || (x == 45)  // !-
            || (x >= 35 && x <= 41)    // #$%&'()
            || (x >= 48 && x <= 57)    // 0-9
            || (x >= 64 && x <= 90)    // @,A-Z
            || (x >= 94 && x <= 95)    // ^_
            || (x >= 97 && x <= 123)  // a-z{
            || (x >= 125 && x <= 126));  // }~
          if (!result)
            return false;
        }
      }
                        return true;
                }

    // no exception - we return null if a site couldn't be created
    // this is useful for creating the default evidence as the majority of URL will be local (file://)
    // and throw an unrequired exception
    internal static string UrlToSite (string url)
    {
      if (url == null)
        return null;

      Uri uri = new Uri (url);
      if (uri.Scheme == Uri.UriSchemeFile)
        return null;
      string site = uri.Host;
      return IsValid (site) ? site : null;
    }
        }
}