public SecurityToken GetToken(TimeSpan timeout)
{
TlsnegoClientSessionContext tlsctx =
new TlsnegoClientSessionContext();
TlsClientSession tls = new TlsClientSession(IssuerAddress.Uri.ToString(), client_certificate, owner.Manager.ClientCredentials.ServiceCertificate.Authentication);
WstRequestSecurityToken rst =
new WstRequestSecurityToken();
string contextId = rst.Context;
// send ClientHello
rst.BinaryExchange = new WstBinaryExchange(Constants.WstBinaryExchangeValueTls);
rst.BinaryExchange.Value = tls.ProcessClientHello();
Message request = Message.CreateMessage(IssuerBinding.MessageVersion, Constants.WstIssueAction, rst);
request.Headers.MessageId = new UniqueId();
request.Headers.ReplyTo = new EndpointAddress(Constants.WsaAnonymousUri);
request.Headers.To = TargetAddress.Uri;
MessageBuffer buffer = request.CreateBufferedCopy(0x10000);
tlsctx.StoreMessage(buffer.CreateMessage().GetReaderAtBodyContents());
Message response = proxy.Issue(buffer.CreateMessage());
// FIXME: use correct limitation
buffer = response.CreateBufferedCopy(0x10000);
tlsctx.StoreMessage(buffer.CreateMessage().GetReaderAtBodyContents());
// receive ServerHello
WSTrustRequestSecurityTokenResponseReader reader =
new WSTrustRequestSecurityTokenResponseReader(Constants.WstTlsnegoProofTokenType, buffer.CreateMessage().GetReaderAtBodyContents(), SecurityTokenSerializer, null);
reader.Read();
if (reader.Value.RequestedSecurityToken != null)
{
return(reader.Value.RequestedSecurityToken);
}
tls.ProcessServerHello(reader.Value.BinaryExchange.Value);
// send ClientKeyExchange
WstRequestSecurityTokenResponse rstr =
new WstRequestSecurityTokenResponse(SecurityTokenSerializer);
rstr.Context = reader.Value.Context;
rstr.BinaryExchange = new WstBinaryExchange(Constants.WstBinaryExchangeValueTls);
rstr.BinaryExchange.Value = tls.ProcessClientKeyExchange();
request = Message.CreateMessage(IssuerBinding.MessageVersion, Constants.WstIssueReplyAction, rstr);
request.Headers.ReplyTo = new EndpointAddress(Constants.WsaAnonymousUri);
request.Headers.To = TargetAddress.Uri;
buffer = request.CreateBufferedCopy(0x10000);
tlsctx.StoreMessage(buffer.CreateMessage().GetReaderAtBodyContents());
//Console.WriteLine (System.Text.Encoding.UTF8.GetString (tlsctx.GetC14NResults ()));
// FIXME: regeneration of this instance is somehow required, but should not be.
proxy = new WSTrustSecurityTokenServiceProxy(
IssuerBinding, IssuerAddress);
response = proxy.IssueReply(buffer.CreateMessage());
// FIXME: use correct limitation
buffer = response.CreateBufferedCopy(0x10000);
WstRequestSecurityTokenResponseCollection coll =
new WstRequestSecurityTokenResponseCollection();
coll.Read(Constants.WstTlsnegoProofTokenType, buffer.CreateMessage().GetReaderAtBodyContents(), SecurityTokenSerializer, null);
if (coll.Responses.Count != 2)
{
throw new SecurityNegotiationException(String.Format("Expected response is RequestSecurityTokenResponseCollection which contains two RequestSecurityTokenResponse items, but it actually contains {0} items", coll.Responses.Count));
}
WstRequestSecurityTokenResponse r = coll.Responses [0];
tls.ProcessServerFinished(r.BinaryExchange.Value);
SecurityContextSecurityToken sctSrc =
r.RequestedSecurityToken;
#if false // FIXME: should this final RSTR included in RSTRC considered too?
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
using (XmlDictionaryWriter dw = XmlDictionaryWriter.CreateDictionaryWriter(doc.CreateNavigator().AppendChild()))
{
if (r == null)
{
throw new Exception("r");
}
if (dw == null)
{
throw new Exception("dw");
}
r.WriteBodyContents(dw);
}
tlsctx.StoreMessage(XmlDictionaryReader.CreateDictionaryReader(new XmlNodeReader(doc)));
#endif
// the RequestedProofToken is represented as 32 bytes
// of TLS ApplicationData.
// - According to WSE2 doc, it is *the* key, but not
// sure it also applies to WCF.
// - WSS4J also seems to store the encryped shared key.
// - (Important) It seems that without tls decryption,
// .NET fails to recover the key.
byte [] proof = tls.ProcessApplicationData(
(byte [])r.RequestedProofToken);
byte [] key = proof;
// Authenticate token.
byte [] actual = coll.Responses [1].Authenticator;
if (actual == null)
{
throw new SecurityNegotiationException("Token authenticator is expected in the RequestSecurityTokenResponse but not found.");
}
if (coll.Responses [0].Context != contextId)
{
throw new SecurityNegotiationException("The context Id does not match with that of the corresponding token authenticator.");
}
// H = sha1(exc14n(RST..RSTRs))
byte [] hash = SHA1.Create().ComputeHash(tlsctx.GetC14NResults());
byte [] referent = tls.CreateHash(key, hash, "AUTH-HASH");
Console.WriteLine(System.Text.Encoding.ASCII.GetString(tlsctx.GetC14NResults()));
Console.Write("Hash: ");
foreach (byte b in hash)
{
Console.Write("{0:X02} ", b);
}
Console.WriteLine();
Console.Write("Referent: ");
foreach (byte b in referent)
{
Console.Write("{0:X02} ", b);
}
Console.WriteLine();
Console.Write("Actual: ");
foreach (byte b in actual)
{
Console.Write("{0:X02} ", b);
}
Console.WriteLine();
Console.Write("Proof: ");
foreach (byte b in proof)
{
Console.Write("{0:X02} ", b);
}
Console.WriteLine();
bool mismatch = referent.Length != actual.Length;
if (!mismatch)
{
for (int i = 0; i < referent.Length; i++)
{
if (referent [i] != actual [i])
{
mismatch = true;
}
}
}
if (mismatch)
{
throw new SecurityNegotiationException("The CombinedHash does not match the expected value.");
}
return(sctSrc);
}
Message ProcessClientKeyExchange(Message request)
{
// FIXME: use correct buffer size
MessageBuffer buffer = request.CreateBufferedCopy(0x10000);
WSTrustRequestSecurityTokenResponseReader reader =
new WSTrustRequestSecurityTokenResponseReader(Constants.WstTlsnegoProofTokenType, buffer.CreateMessage().GetReaderAtBodyContents(), SecurityTokenSerializer, null);
reader.Read();
TlsServerSessionInfo tlsInfo;
if (!sessions.TryGetValue(reader.Value.Context, out tlsInfo))
{
throw new SecurityNegotiationException(String.Format("The context '{0}' does not exist in this SSL negotiation manager", reader.Value.Context));
}
TlsServerSession tls = tlsInfo.Tls;
AppendNegotiationMessageXml(buffer.CreateMessage().GetReaderAtBodyContents(), tlsInfo);
//Console.WriteLine (System.Text.Encoding.UTF8.GetString (tlsInfo.Messages.ToArray ()));
tls.ProcessClientKeyExchange(reader.Value.BinaryExchange.Value);
byte [] serverFinished = tls.ProcessServerFinished();
// The shared key is computed as recommended in WS-Trust:
// P_SHA1(encrypted_key,SHA1(exc14n(RST..RSTRs))+"CK-HASH")
byte [] hash = SHA1.Create().ComputeHash(tlsInfo.Messages.ToArray());
byte [] key = tls.CreateHash(tls.MasterSecret, hash, "CK-HASH");
byte [] keyTlsApplied = tls.ProcessApplicationData(key);
foreach (byte b in hash)
{
Console.Write("{0:X02} ", b);
}
Console.WriteLine();
foreach (byte b in key)
{
Console.Write("{0:X02} ", b);
}
Console.WriteLine();
WstRequestSecurityTokenResponseCollection col =
new WstRequestSecurityTokenResponseCollection();
WstRequestSecurityTokenResponse rstr =
new WstRequestSecurityTokenResponse(SecurityTokenSerializer);
rstr.Context = reader.Value.Context;
rstr.TokenType = Constants.WsscContextToken;
DateTime from = DateTime.Now;
// FIXME: not sure if arbitrary key is used here.
SecurityContextSecurityToken sct = SecurityContextSecurityToken.CreateCookieSecurityContextToken(
// Create a new context.
// (do not use sslnego context here.)
new UniqueId(),
"uuid-" + Guid.NewGuid(),
key,
from,
// FIXME: use LocalServiceSecuritySettings.NegotiationTimeout
from.AddHours(8),
null,
owner.Manager.ServiceCredentials.SecureConversationAuthentication.SecurityStateEncoder);
rstr.RequestedSecurityToken = sct;
// without this ProcessApplicationData(), .NET seems
// to fail recovering the key.
rstr.RequestedProofToken = keyTlsApplied;
rstr.RequestedAttachedReference = new LocalIdKeyIdentifierClause(sct.Id);
rstr.RequestedUnattachedReference = new SecurityContextKeyIdentifierClause(sct.ContextId, null);
WstLifetime lt = new WstLifetime();
lt.Created = from;
lt.Expires = from.Add(SecurityBindingElement.LocalServiceSettings.IssuedCookieLifetime);
rstr.Lifetime = lt;
rstr.BinaryExchange = new WstBinaryExchange(Constants.WstBinaryExchangeValueTls);
rstr.BinaryExchange.Value = serverFinished;
col.Responses.Add(rstr);
// Authenticator is mandatory for MS sslnego.
rstr = new WstRequestSecurityTokenResponse(SecurityTokenSerializer);
rstr.Context = reader.Value.Context;
rstr.Authenticator = tls.CreateHash(key, hash, "AUTH-HASH");
col.Responses.Add(rstr);
sessions.Remove(reader.Value.Context);
// FIXME: get correct tokenRequestor address (probably identity authorized?)
if (owner.IssuedSecurityTokenHandler != null)
{
owner.IssuedSecurityTokenHandler(sct, request.Headers.ReplyTo);
}
return(Message.CreateMessage(request.Version, Constants.WstIssueReplyAction, col));
}
Message ProcessClientKeyExchange (Message request)
{
// FIXME: use correct buffer size
MessageBuffer buffer = request.CreateBufferedCopy (0x10000);
WSTrustRequestSecurityTokenResponseReader reader =
new WSTrustRequestSecurityTokenResponseReader (Constants.WstTlsnegoProofTokenType, buffer.CreateMessage ().GetReaderAtBodyContents (), SecurityTokenSerializer, null);
reader.Read ();
TlsServerSessionInfo tlsInfo;
if (!sessions.TryGetValue (reader.Value.Context, out tlsInfo))
throw new SecurityNegotiationException (String.Format ("The context '{0}' does not exist in this SSL negotiation manager", reader.Value.Context));
TlsServerSession tls = tlsInfo.Tls;
AppendNegotiationMessageXml (buffer.CreateMessage ().GetReaderAtBodyContents (), tlsInfo);
//Console.WriteLine (System.Text.Encoding.UTF8.GetString (tlsInfo.Messages.ToArray ()));
tls.ProcessClientKeyExchange (reader.Value.BinaryExchange.Value);
byte [] serverFinished = tls.ProcessServerFinished ();
// The shared key is computed as recommended in WS-Trust:
// P_SHA1(encrypted_key,SHA1(exc14n(RST..RSTRs))+"CK-HASH")
byte [] hash = SHA1.Create ().ComputeHash (tlsInfo.Messages.ToArray ());
byte [] key = tls.CreateHash (tls.MasterSecret, hash, "CK-HASH");
byte [] keyTlsApplied = tls.ProcessApplicationData (key);
foreach (byte b in hash) Console.Write ("{0:X02} ", b); Console.WriteLine ();
foreach (byte b in key) Console.Write ("{0:X02} ", b); Console.WriteLine ();
WstRequestSecurityTokenResponseCollection col =
new WstRequestSecurityTokenResponseCollection ();
WstRequestSecurityTokenResponse rstr =
new WstRequestSecurityTokenResponse (SecurityTokenSerializer);
rstr.Context = reader.Value.Context;
rstr.TokenType = Constants.WsscContextToken;
DateTime from = DateTime.Now;
// FIXME: not sure if arbitrary key is used here.
SecurityContextSecurityToken sct = SecurityContextSecurityToken.CreateCookieSecurityContextToken (
// Create a new context.
// (do not use sslnego context here.)
new UniqueId (),
"uuid-" + Guid.NewGuid (),
key,
from,
// FIXME: use LocalServiceSecuritySettings.NegotiationTimeout
from.AddHours (8),
null,
owner.Manager.ServiceCredentials.SecureConversationAuthentication.SecurityStateEncoder);
rstr.RequestedSecurityToken = sct;
// without this ProcessApplicationData(), .NET seems
// to fail recovering the key.
rstr.RequestedProofToken = keyTlsApplied;
rstr.RequestedAttachedReference = new LocalIdKeyIdentifierClause (sct.Id);
rstr.RequestedUnattachedReference = new SecurityContextKeyIdentifierClause (sct.ContextId, null);
WstLifetime lt = new WstLifetime ();
lt.Created = from;
lt.Expires = from.Add (SecurityBindingElement.LocalServiceSettings.IssuedCookieLifetime);
rstr.Lifetime = lt;
rstr.BinaryExchange = new WstBinaryExchange (Constants.WstBinaryExchangeValueTls);
rstr.BinaryExchange.Value = serverFinished;
col.Responses.Add (rstr);
// Authenticator is mandatory for MS sslnego.
rstr = new WstRequestSecurityTokenResponse (SecurityTokenSerializer);
rstr.Context = reader.Value.Context;
rstr.Authenticator = tls.CreateHash (key, hash, "AUTH-HASH");
col.Responses.Add (rstr);
sessions.Remove (reader.Value.Context);
// FIXME: get correct tokenRequestor address (probably identity authorized?)
if (owner.IssuedSecurityTokenHandler != null)
owner.IssuedSecurityTokenHandler (sct, request.Headers.ReplyTo);
return Message.CreateMessage (request.Version, Constants.WstIssueReplyAction, col);
}
public SecurityToken GetToken (TimeSpan timeout)
{
TlsnegoClientSessionContext tlsctx =
new TlsnegoClientSessionContext ();
TlsClientSession tls = new TlsClientSession (IssuerAddress.Uri.ToString (), client_certificate, owner.Manager.ClientCredentials.ServiceCertificate.Authentication);
WstRequestSecurityToken rst =
new WstRequestSecurityToken ();
string contextId = rst.Context;
// send ClientHello
rst.BinaryExchange = new WstBinaryExchange (Constants.WstBinaryExchangeValueTls);
rst.BinaryExchange.Value = tls.ProcessClientHello ();
Message request = Message.CreateMessage (IssuerBinding.MessageVersion, Constants.WstIssueAction, rst);
request.Headers.MessageId = new UniqueId ();
request.Headers.ReplyTo = new EndpointAddress (Constants.WsaAnonymousUri);
request.Headers.To = TargetAddress.Uri;
MessageBuffer buffer = request.CreateBufferedCopy (0x10000);
tlsctx.StoreMessage (buffer.CreateMessage ().GetReaderAtBodyContents ());
Message response = proxy.Issue (buffer.CreateMessage ());
// FIXME: use correct limitation
buffer = response.CreateBufferedCopy (0x10000);
tlsctx.StoreMessage (buffer.CreateMessage ().GetReaderAtBodyContents ());
// receive ServerHello
WSTrustRequestSecurityTokenResponseReader reader =
new WSTrustRequestSecurityTokenResponseReader (Constants.WstTlsnegoProofTokenType, buffer.CreateMessage ().GetReaderAtBodyContents (), SecurityTokenSerializer, null);
reader.Read ();
if (reader.Value.RequestedSecurityToken != null)
return reader.Value.RequestedSecurityToken;
tls.ProcessServerHello (reader.Value.BinaryExchange.Value);
// send ClientKeyExchange
WstRequestSecurityTokenResponse rstr =
new WstRequestSecurityTokenResponse (SecurityTokenSerializer);
rstr.Context = reader.Value.Context;
rstr.BinaryExchange = new WstBinaryExchange (Constants.WstBinaryExchangeValueTls);
rstr.BinaryExchange.Value = tls.ProcessClientKeyExchange ();
request = Message.CreateMessage (IssuerBinding.MessageVersion, Constants.WstIssueReplyAction, rstr);
request.Headers.ReplyTo = new EndpointAddress (Constants.WsaAnonymousUri);
request.Headers.To = TargetAddress.Uri;
buffer = request.CreateBufferedCopy (0x10000);
tlsctx.StoreMessage (buffer.CreateMessage ().GetReaderAtBodyContents ());
//Console.WriteLine (System.Text.Encoding.UTF8.GetString (tlsctx.GetC14NResults ()));
// FIXME: regeneration of this instance is somehow required, but should not be.
proxy = new WSTrustSecurityTokenServiceProxy (
IssuerBinding, IssuerAddress);
response = proxy.IssueReply (buffer.CreateMessage ());
// FIXME: use correct limitation
buffer = response.CreateBufferedCopy (0x10000);
WstRequestSecurityTokenResponseCollection coll =
new WstRequestSecurityTokenResponseCollection ();
coll.Read (Constants.WstTlsnegoProofTokenType, buffer.CreateMessage ().GetReaderAtBodyContents (), SecurityTokenSerializer, null);
if (coll.Responses.Count != 2)
throw new SecurityNegotiationException (String.Format ("Expected response is RequestSecurityTokenResponseCollection which contains two RequestSecurityTokenResponse items, but it actually contains {0} items", coll.Responses.Count));
WstRequestSecurityTokenResponse r = coll.Responses [0];
tls.ProcessServerFinished (r.BinaryExchange.Value);
SecurityContextSecurityToken sctSrc =
r.RequestedSecurityToken;
#if false // FIXME: should this final RSTR included in RSTRC considered too?
XmlDocument doc = new XmlDocument ();
doc.PreserveWhitespace = true;
using (XmlDictionaryWriter dw = XmlDictionaryWriter.CreateDictionaryWriter (doc.CreateNavigator ().AppendChild ())) {
if (r == null) throw new Exception ("r");
if (dw == null) throw new Exception ("dw");
r.WriteBodyContents (dw);
}
tlsctx.StoreMessage (XmlDictionaryReader.CreateDictionaryReader (new XmlNodeReader (doc)));
#endif
// the RequestedProofToken is represented as 32 bytes
// of TLS ApplicationData.
// - According to WSE2 doc, it is *the* key, but not
// sure it also applies to WCF.
// - WSS4J also seems to store the encryped shared key.
// - (Important) It seems that without tls decryption,
// .NET fails to recover the key.
byte [] proof = tls.ProcessApplicationData (
(byte []) r.RequestedProofToken);
byte [] key = proof;
// Authenticate token.
byte [] actual = coll.Responses [1].Authenticator;
if (actual == null)
throw new SecurityNegotiationException ("Token authenticator is expected in the RequestSecurityTokenResponse but not found.");
if (coll.Responses [0].Context != contextId)
throw new SecurityNegotiationException ("The context Id does not match with that of the corresponding token authenticator.");
// H = sha1(exc14n(RST..RSTRs))
byte [] hash = SHA1.Create ().ComputeHash (tlsctx.GetC14NResults ());
byte [] referent = tls.CreateHash (key, hash, "AUTH-HASH");
/*
Console.WriteLine (System.Text.Encoding.ASCII.GetString (tlsctx.GetC14NResults ()));
Console.Write ("Hash: ");
foreach (byte b in hash) Console.Write ("{0:X02} ", b); Console.WriteLine ();
Console.Write ("Referent: ");
foreach (byte b in referent) Console.Write ("{0:X02} ", b); Console.WriteLine ();
Console.Write ("Actual: ");
foreach (byte b in actual) Console.Write ("{0:X02} ", b); Console.WriteLine ();
Console.Write ("Proof: ");
foreach (byte b in proof) Console.Write ("{0:X02} ", b); Console.WriteLine ();
*/
bool mismatch = referent.Length != actual.Length;
if (!mismatch)
for (int i = 0; i < referent.Length; i++)
if (referent [i] != actual [i])
mismatch = true;
if (mismatch)
throw new SecurityNegotiationException ("The CombinedHash does not match the expected value.");
return sctSrc;
}
