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using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.Web;
using System.Web.Caching;
using Janrain.OpenId;
namespace Janrain.OpenId.Store
{
public class MemoryStore : IAssociationStore
{
#region Member Variables
private static MemoryStore local_instance = new MemoryStore();
private Cache cache = HttpRuntime.Cache;
#endregion
#region Constructor(s)
private MemoryStore()
{
}
#endregion
#region Private Properties
private Hashtable ServerAssocsTable
{
get
{
Hashtable server_assocs = (Hashtable)this.cache["OpenId.serverAssocs"];
if (server_assocs == null)
server_assocs = new Hashtable();
return server_assocs;
}
set
{
this.cache["OpenId.serverAssocs"] = value;
}
}
private Hashtable Nonces
{
get
{
Hashtable nonces = (Hashtable)this.cache["OpenId.nonces"];
if (nonces == null)
nonces = new Hashtable();
return nonces;
}
set
{
this.cache["OpenId.nonces"] = value;
}
}
#endregion
#region Methods
public static MemoryStore GetInstance()
{
return local_instance;
}
public ServerAssocs GetServerAssocs(Uri server_url)
{
lock (this)
{
Hashtable table = this.ServerAssocsTable;
if (!table.ContainsKey(server_url))
{
table.Add(server_url, new ServerAssocs());
this.ServerAssocsTable = table;
}
return (ServerAssocs)table[server_url];
}
}
public void StoreAssociation(Uri server_url, Association assoc)
{
lock (this)
{
Hashtable table = this.ServerAssocsTable;
if (!table.ContainsKey(server_url))
table.Add(server_url, new ServerAssocs());
ServerAssocs server_assocs = (ServerAssocs)table[server_url];
server_assocs.Set(assoc);
this.ServerAssocsTable = table;
}
}
public Association GetAssociation(Uri serverUri)
{
lock (this)
{
return GetServerAssocs(serverUri).Best();
}
}
public Association GetAssociation(Uri serverUri, string handle)
{
lock (this)
{
return GetServerAssocs(serverUri).Get(handle);
}
}
public bool RemoveAssociation(Uri serverUri, string handle)
{
lock (this)
{
return GetServerAssocs(serverUri).Remove(handle);
}
}
public bool StoreNonce(string nonce)
{
lock (this)
{
Hashtable nonces = this.Nonces;
bool present = nonces.ContainsKey(nonce);
nonces.Remove(nonce);
this.Nonces = nonces;
return present;
}
}
public bool UseNonce(string nonce)
{
lock (this)
{
Hashtable nonces = this.Nonces;
bool present = nonces.ContainsKey(nonce);
nonces.Remove(nonce);
this.Nonces = nonces;
return present;
}
}
#endregion
#region IAssociationStore Members
byte[] IAssociationStore.AuthKey
{
get
{
lock (this)
{
byte[] auth_key = (byte[])this.cache["OpenId.authKey"];
if (auth_key == null)
{
auth_key = new byte[20];
new RNGCryptoServiceProvider().GetBytes(auth_key);
this.cache.Insert("OpenId.authKey", auth_key);
}
return auth_key;
}
}
}
bool IAssociationStore.IsDumb
{
get { return false; }
}
void IAssociationStore.StoreAssociation(Uri serverUri, Association assoc)
{
this.StoreAssociation(serverUri, assoc);
}
Association IAssociationStore.GetAssociation(Uri serverUri)
{
return this.GetAssociation(serverUri);
}
Association IAssociationStore.GetAssociation(Uri serverUri, string handle)
{
return this.GetAssociation(serverUri, handle);
}
bool IAssociationStore.RemoveAssociation(Uri serverUri, string handle)
{
return this.RemoveAssociation(serverUri, handle);
}
void IAssociationStore.StoreNonce(string nonce)
{
this.StoreNonce(nonce);
}
bool IAssociationStore.UseNonce(string nonce)
{
return this.UseNonce(nonce);
}
#endregion
}
// TODO Move this class out to it's own file
public class ServerAssocs
{
#region Private Members
private Hashtable assocs;
#endregion
#region Constructor(s)
public ServerAssocs()
{
this.assocs = new Hashtable();
}
#endregion
#region Methods
public void Set(Association assoc)
{
this.assocs[assoc.Handle] = assoc;
}
public Association Get(string handle)
{
Association assoc = null;
if (this.assocs.Contains(handle))
assoc = (Association)this.assocs[handle];
return assoc;
}
public bool Remove(string handle)
{
bool present = this.assocs.Contains(handle);
this.assocs.Remove(handle);
return present;
}
public Association Best()
{
Association best = null;
foreach (Association assoc in this.assocs.Values)
{
if (best == null || best.Issued < assoc.Issued)
best = assoc;
}
return best;
}
#endregion
}
}
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