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//
// System.Net.CredentialCache.cs
//
// Author:
// Lawrence Pit (loz@cable.a2000.nl)
//
//
// 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;
using System.Collections;
using System.Runtime.Serialization;
namespace System.Net
{
public class CredentialCache : ICredentials, IEnumerable
{
// Fields
private Hashtable cache;
// Constructors
public CredentialCache ()
{
cache = new Hashtable ();
}
// Properties
[MonoTODO ("Need EnvironmentPermission implementation first")]
public static ICredentials DefaultCredentials {
get {
// This is used for NTLM, Kerberos and Negotiate under MS
return null;
}
}
// ICredentials
public NetworkCredential GetCredential (Uri uriPrefix, string authType)
{
int longestPrefix = -1;
NetworkCredential result = null;
if (uriPrefix == null || authType == null)
return null;
string absPath = uriPrefix.AbsolutePath;
absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
IDictionaryEnumerator e = cache.GetEnumerator ();
while (e.MoveNext ()) {
CredentialCacheKey key = e.Key as CredentialCacheKey;
if (key.Length <= longestPrefix)
continue;
if (String.Compare (key.AuthType, authType, true) != 0)
continue;
Uri cachedUri = key.UriPrefix;
if (cachedUri.Scheme != uriPrefix.Scheme)
continue;
if (cachedUri.Port != uriPrefix.Port)
continue;
if (cachedUri.Host != uriPrefix.Host)
continue;
if (!absPath.StartsWith (key.AbsPath))
continue;
longestPrefix = key.Length;
result = (NetworkCredential) e.Value;
}
return result;
}
// IEnumerable
public IEnumerator GetEnumerator ()
{
return cache.Values.GetEnumerator ();
}
// Methods
public void Add (Uri uriPrefix, string authType, NetworkCredential cred)
{
if (uriPrefix == null)
throw new ArgumentNullException ("uriPrefix");
if (authType == null)
throw new ArgumentNullException ("authType");
// throws ArgumentException when same key already exists.
cache.Add (new CredentialCacheKey (uriPrefix, authType), cred);
}
public void Remove (Uri uriPrefix, string authType)
{
if (uriPrefix == null)
throw new ArgumentNullException ("uriPrefix");
if (authType == null)
throw new ArgumentNullException ("authType");
cache.Remove (new CredentialCacheKey (uriPrefix, authType));
}
// Inner Classes
internal class CredentialCacheKey
{
private Uri uriPrefix;
private string authType;
private string absPath;
private int len;
private int hash;
internal CredentialCacheKey (Uri uriPrefix, string authType)
{
this.uriPrefix = uriPrefix;
this.authType = authType;
this.absPath = uriPrefix.AbsolutePath;
this.absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
this.len = uriPrefix.AbsoluteUri.Length;
this.hash = uriPrefix.GetHashCode ()
+ authType.ToString ().GetHashCode ();
}
public int Length {
get { return len; }
}
public string AbsPath {
get { return absPath; }
}
public Uri UriPrefix {
get { return uriPrefix; }
}
public string AuthType {
get { return authType; }
}
public override int GetHashCode ()
{
return hash;
}
public override bool Equals (object obj)
{
CredentialCacheKey key = obj as CredentialCacheKey;
return ((key != null) && (this.hash == key.hash));
}
public override string ToString ()
{
return absPath + " : " + authType + " : len=" + len;
}
}
}
}
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