private Authorization DoAuthenticate(string challenge, WebRequest webRequest, ICredentials credentials, bool preAuthenticate)
{
if (credentials == null)
{
return(null);
}
HttpWebRequest request = webRequest as HttpWebRequest;
NTAuthentication securityContext = null;
string incomingBlob = null;
if (!preAuthenticate)
{
int index = AuthenticationManager.FindSubstringNotInQuotes(challenge, Signature);
if (index < 0)
{
return(null);
}
int startIndex = index + SignatureSize;
if ((challenge.Length > startIndex) && (challenge[startIndex] != ','))
{
startIndex++;
}
else
{
index = -1;
}
if ((index >= 0) && (challenge.Length > startIndex))
{
index = challenge.IndexOf(',', startIndex);
if (index != -1)
{
incomingBlob = challenge.Substring(startIndex, index - startIndex);
}
else
{
incomingBlob = challenge.Substring(startIndex);
}
}
securityContext = request.CurrentAuthenticationState.GetSecurityContext(this);
}
if (securityContext == null)
{
NetworkCredential credential = credentials.GetCredential(request.ChallengedUri, Signature);
string str2 = string.Empty;
if ((credential == null) || (!(credential is SystemNetworkCredential) && ((str2 = credential.InternalGetUserName()).Length == 0)))
{
return(null);
}
if (((str2.Length + credential.InternalGetPassword().Length) + credential.InternalGetDomain().Length) > 0x20f)
{
return(null);
}
ICredentialPolicy credentialPolicy = AuthenticationManager.CredentialPolicy;
if ((credentialPolicy != null) && !credentialPolicy.ShouldSendCredential(request.ChallengedUri, request, credential, this))
{
return(null);
}
string computeSpn = request.CurrentAuthenticationState.GetComputeSpn(request);
ChannelBinding channelBinding = null;
if (request.CurrentAuthenticationState.TransportContext != null)
{
channelBinding = request.CurrentAuthenticationState.TransportContext.GetChannelBinding(ChannelBindingKind.Endpoint);
}
securityContext = new NTAuthentication("NTLM", credential, computeSpn, request, channelBinding);
request.CurrentAuthenticationState.SetSecurityContext(securityContext, this);
}
string outgoingBlob = securityContext.GetOutgoingBlob(incomingBlob);
if (outgoingBlob == null)
{
return(null);
}
bool unsafeOrProxyAuthenticatedConnectionSharing = request.UnsafeOrProxyAuthenticatedConnectionSharing;
if (unsafeOrProxyAuthenticatedConnectionSharing)
{
request.LockConnection = true;
}
request.NtlmKeepAlive = incomingBlob == null;
return(AuthenticationManager.GetGroupAuthorization(this, "NTLM " + outgoingBlob, securityContext.IsCompleted, securityContext, unsafeOrProxyAuthenticatedConnectionSharing, false));
}
private Authorization DoAuthenticate(string challenge, WebRequest webRequest, ICredentials credentials, bool preAuthenticate)
{
GlobalLog.Print("NegotiateClient::DoAuthenticate() challenge:[" + ValidationHelper.ToString(challenge) + "] webRequest#" + ValidationHelper.HashString(webRequest) + " credentials#" + ValidationHelper.HashString(credentials) + " preAuthenticate:" + preAuthenticate.ToString());
GlobalLog.Assert(credentials != null, "NegotiateClient::DoAuthenticate()|credentials == null");
if (credentials == null)
{
return(null);
}
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
GlobalLog.Assert(httpWebRequest != null, "NegotiateClient::DoAuthenticate()|httpWebRequest == null");
GlobalLog.Assert(httpWebRequest.ChallengedUri != null, "NegotiateClient::DoAuthenticate()|httpWebRequest.ChallengedUri == null");
NTAuthentication authSession = null;
string incoming = null;
bool useNego2 = false; // In case of pre-auth we always use "Negotiate", never "Nego2".
if (!preAuthenticate)
{
int index = GetSignatureIndex(challenge, out useNego2);
if (index < 0)
{
return(null);
}
int blobBegin = index + (useNego2 ? nego2Signature.Length : negotiateSignature.Length);
//
// there may be multiple challenges. If the next character after the
// package name is not a comma then it is challenge data
//
if (challenge.Length > blobBegin && challenge[blobBegin] != ',')
{
++blobBegin;
}
else
{
index = -1;
}
if (index >= 0 && challenge.Length > blobBegin)
{
// Strip other modules information in case of multiple challenges
// i.e do not take ", NTLM" as part of the following Negotiate blob
// Negotiate TlRMTVNTUAACAAAADgAOADgAAAA1wo ... MAbwBmAHQALgBjAG8AbQAAAAAA,NTLM
index = challenge.IndexOf(',', blobBegin);
if (index != -1)
{
incoming = challenge.Substring(blobBegin, index - blobBegin);
}
else
{
incoming = challenge.Substring(blobBegin);
}
}
authSession = httpWebRequest.CurrentAuthenticationState.GetSecurityContext(this);
GlobalLog.Print("NegotiateClient::DoAuthenticate() key:" + ValidationHelper.HashString(httpWebRequest.CurrentAuthenticationState) + " retrieved authSession:" + ValidationHelper.HashString(authSession));
}
if (authSession == null)
{
// Credentials are always set for "Negotiate", never for "Nego2". A customer shouldn't even know
// about "Nego2".
NetworkCredential NC = credentials.GetCredential(httpWebRequest.ChallengedUri, negotiateSignature);
GlobalLog.Print("NegotiateClient::DoAuthenticate() GetCredential() returns:" + ValidationHelper.ToString(NC));
string username = string.Empty;
if (NC == null || (!(NC is SystemNetworkCredential) && (username = NC.InternalGetUserName()).Length == 0))
{
return(null);
}
ICredentialPolicy policy = AuthenticationManager.CredentialPolicy;
if (policy != null && !policy.ShouldSendCredential(httpWebRequest.ChallengedUri, httpWebRequest, NC, this))
{
return(null);
}
SpnToken spn = httpWebRequest.CurrentAuthenticationState.GetComputeSpn(httpWebRequest);
GlobalLog.Print("NegotiateClient::Authenticate() ChallengedSpn:" + ValidationHelper.ToString(spn));
ChannelBinding binding = null;
if (httpWebRequest.CurrentAuthenticationState.TransportContext != null)
{
binding = httpWebRequest.CurrentAuthenticationState.TransportContext.GetChannelBinding(ChannelBindingKind.Endpoint);
}
authSession =
new NTAuthentication(
AuthType,
NC,
spn,
httpWebRequest,
binding);
GlobalLog.Print("NegotiateClient::DoAuthenticate() setting SecurityContext for:" + ValidationHelper.HashString(httpWebRequest.CurrentAuthenticationState) + " to authSession:" + ValidationHelper.HashString(authSession));
httpWebRequest.CurrentAuthenticationState.SetSecurityContext(authSession, this);
}
string clientResponse = authSession.GetOutgoingBlob(incoming);
if (clientResponse == null)
{
return(null);
}
bool canShareConnection = httpWebRequest.UnsafeOrProxyAuthenticatedConnectionSharing;
if (canShareConnection)
{
httpWebRequest.LockConnection = true;
}
// this is the first leg of an NTLM handshake,
// set the NtlmKeepAlive override *STRICTLY* only in this case.
httpWebRequest.NtlmKeepAlive = incoming == null && authSession.IsValidContext && !authSession.IsKerberos;
// If we received a "Nego2" header value from the server, we'll respond with "Nego2" in the "Authorization"
// header. If the server sent a "Negotiate" header value or if pre-authenticate is used (i.e. the auth blob
// is sent with the first request), we send "Negotiate" in the "Authorization" header.
return(AuthenticationManager.GetGroupAuthorization(this, (useNego2 ? nego2Header : negotiateHeader) +
" " + clientResponse, authSession.IsCompleted, authSession, canShareConnection, authSession.IsKerberos));
}
public Authorization Authenticate(string challenge, WebRequest webRequest, ICredentials credentials)
{
GlobalLog.Print("NegotiateClient::Authenticate(): " + challenge);
GlobalLog.Assert(credentials != null, "NegotiateClient::Authenticate() credentials==null", "");
if (credentials == null)
{
return(null);
}
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
GlobalLog.Assert(httpWebRequest != null, "NegotiateClient::Authenticate() httpWebRequest==null", "");
if (httpWebRequest == null || httpWebRequest.ChallengedUri == null)
{
//
// there has been no challenge:
// 1) the request never went on the wire
// 2) somebody other than us is calling into AuthenticationManager
//
return(null);
}
int index = AuthenticationManager.FindSubstringNotInQuotes(challenge.ToLower(CultureInfo.InvariantCulture), Signature);
if (index < 0)
{
return(null);
}
int blobBegin = index + SignatureSize;
string incoming = null;
//
// there may be multiple challenges. If the next character after the
// package name is not a comma then it is challenge data
//
if (challenge.Length > blobBegin && challenge[blobBegin] != ',')
{
++blobBegin;
}
else
{
index = -1;
}
if (index >= 0 && challenge.Length > blobBegin)
{
incoming = challenge.Substring(blobBegin);
}
NTAuthentication authSession = sessions[httpWebRequest.CurrentAuthenticationState] as NTAuthentication;
GlobalLog.Print("NegotiateClient::Authenticate() key:" + ValidationHelper.HashString(httpWebRequest.CurrentAuthenticationState) + " retrieved authSession:" + ValidationHelper.HashString(authSession));
if (authSession == null)
{
NetworkCredential NC = credentials.GetCredential(httpWebRequest.ChallengedUri, Signature);
GlobalLog.Print("NegotiateClient::Authenticate() GetCredential() returns:" + ValidationHelper.ToString(NC));
if (NC == null)
{
return(null);
}
string username = NC.UserName;
if (username == null || (username.Length == 0 && !(NC is SystemNetworkCredential)))
{
return(null);
}
//
// here we cover a hole in the SSPI layer. longer credentials
// might corrupt the process and cause a reboot.
//
if (username.Length + NC.Password.Length + NC.Domain.Length > NtlmClient.MaxNtlmCredentialSize)
{
//
// rather then throwing an exception here we return null so other packages can be used.
// this is questionable, hence:
// Consider: make this throw a NotSupportedException so it is discoverable
//
return(null);
}
if (httpWebRequest.ChallengedSpn == null)
{
string host = httpWebRequest.ChallengedUri.Host;
if (httpWebRequest.ChallengedUri.HostNameType != UriHostNameType.IPv6 && httpWebRequest.ChallengedUri.HostNameType != UriHostNameType.IPv4 && host.IndexOf('.') == -1)
{
// only do the DNS lookup for short names, no form of IP addess
(new DnsPermission(PermissionState.Unrestricted)).Assert();
try {
host = Dns.GetHostByName(host).HostName;
GlobalLog.Print("NegotiateClient::Authenticate() Dns returned host:" + ValidationHelper.ToString(host));
}
catch (Exception exception) {
GlobalLog.Print("NegotiateClient::Authenticate() GetHostByName(host) failed:" + ValidationHelper.ToString(exception));
}
finally {
DnsPermission.RevertAssert();
}
}
// CONSIDER V.NEXT
// for now avoid appending the non default port to the
// SPN, sometime in the future we'll have to do this.
// httpWebRequest.ChallengedSpn = httpWebRequest.ChallengedUri.IsDefaultPort ? host : host + ":" + httpWebRequest.ChallengedUri.Port;
httpWebRequest.ChallengedSpn = host;
}
GlobalLog.Print("NegotiateClient::Authenticate() ChallengedSpn:" + ValidationHelper.ToString(httpWebRequest.ChallengedSpn));
authSession =
new NTAuthentication(
AuthType,
NC,
"HTTP/" + httpWebRequest.ChallengedSpn,
httpWebRequest.DelegationFix);
GlobalLog.Print("NegotiateClient::Authenticate() adding authSession:" + ValidationHelper.HashString(authSession) + " for:" + ValidationHelper.HashString(httpWebRequest.CurrentAuthenticationState));
sessions.Add(httpWebRequest.CurrentAuthenticationState, authSession);
}
bool handshakeComplete;
string clientResponse = authSession.GetOutgoingBlob(incoming, out handshakeComplete);
if (clientResponse == null)
{
return(null);
}
if (httpWebRequest.UnsafeAuthenticatedConnectionSharing)
{
httpWebRequest.LockConnection = true;
}
return(AuthenticationManager.GetGroupAuthorization(this, AuthType + " " + clientResponse, false, authSession, httpWebRequest.UnsafeAuthenticatedConnectionSharing));
}
private Authorization DoAuthenticate(string challenge, WebRequest webRequest, ICredentials credentials, bool preAuthenticate)
{
if (credentials == null)
{
return(null);
}
HttpWebRequest request = webRequest as HttpWebRequest;
NTAuthentication securityContext = null;
string incomingBlob = null;
bool flag = false;
if (!preAuthenticate)
{
int signatureIndex = GetSignatureIndex(challenge, out flag);
if (signatureIndex < 0)
{
return(null);
}
int startIndex = signatureIndex + (flag ? "nego2".Length : "negotiate".Length);
if ((challenge.Length > startIndex) && (challenge[startIndex] != ','))
{
startIndex++;
}
else
{
signatureIndex = -1;
}
if ((signatureIndex >= 0) && (challenge.Length > startIndex))
{
signatureIndex = challenge.IndexOf(',', startIndex);
if (signatureIndex != -1)
{
incomingBlob = challenge.Substring(startIndex, signatureIndex - startIndex);
}
else
{
incomingBlob = challenge.Substring(startIndex);
}
}
securityContext = request.CurrentAuthenticationState.GetSecurityContext(this);
}
if (securityContext == null)
{
NetworkCredential credential = credentials.GetCredential(request.ChallengedUri, "negotiate");
if ((credential == null) || (!(credential is SystemNetworkCredential) && (credential.InternalGetUserName().Length == 0)))
{
return(null);
}
ICredentialPolicy credentialPolicy = AuthenticationManager.CredentialPolicy;
if ((credentialPolicy != null) && !credentialPolicy.ShouldSendCredential(request.ChallengedUri, request, credential, this))
{
return(null);
}
string computeSpn = request.CurrentAuthenticationState.GetComputeSpn(request);
ChannelBinding channelBinding = null;
if (request.CurrentAuthenticationState.TransportContext != null)
{
channelBinding = request.CurrentAuthenticationState.TransportContext.GetChannelBinding(ChannelBindingKind.Endpoint);
}
securityContext = new NTAuthentication("Negotiate", credential, computeSpn, request, channelBinding);
request.CurrentAuthenticationState.SetSecurityContext(securityContext, this);
}
string outgoingBlob = securityContext.GetOutgoingBlob(incomingBlob);
if (outgoingBlob == null)
{
return(null);
}
bool unsafeOrProxyAuthenticatedConnectionSharing = request.UnsafeOrProxyAuthenticatedConnectionSharing;
if (unsafeOrProxyAuthenticatedConnectionSharing)
{
request.LockConnection = true;
}
request.NtlmKeepAlive = ((incomingBlob == null) && securityContext.IsValidContext) && !securityContext.IsKerberos;
return(AuthenticationManager.GetGroupAuthorization(this, (flag ? "Nego2" : "Negotiate") + " " + outgoingBlob, securityContext.IsCompleted, securityContext, unsafeOrProxyAuthenticatedConnectionSharing, securityContext.IsKerberos));
}
public Authorization Authenticate(string challenge, WebRequest webRequest, ICredentials credentials)
{
GlobalLog.Print("NtlmClient::Authenticate(): " + challenge);
GlobalLog.Assert(credentials != null, "NtlmClient::Authenticate() credentials==null", "");
if (credentials == null)
{
return(null);
}
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
GlobalLog.Assert(httpWebRequest != null, "NtlmClient::Authenticate() httpWebRequest==null", "");
if (httpWebRequest == null || httpWebRequest.ChallengedUri == null)
{
//
// there has been no challenge:
// 1) the request never went on the wire
// 2) somebody other than us is calling into AuthenticationManager
//
return(null);
}
int index = AuthenticationManager.FindSubstringNotInQuotes(challenge.ToLower(CultureInfo.InvariantCulture), Signature);
if (index < 0)
{
return(null);
}
int blobBegin = index + SignatureSize;
string incoming = null;
//
// there may be multiple challenges. If the next character after the
// package name is not a comma then it is challenge data
//
if (challenge.Length > blobBegin && challenge[blobBegin] != ',')
{
++blobBegin;
}
else
{
index = -1;
}
if (index >= 0 && challenge.Length > blobBegin)
{
incoming = challenge.Substring(blobBegin);
}
NTAuthentication authSession = sessions[httpWebRequest.CurrentAuthenticationState] as NTAuthentication;
GlobalLog.Print("NtlmClient::Authenticate() key:" + ValidationHelper.HashString(httpWebRequest.CurrentAuthenticationState) + " retrieved authSession:" + ValidationHelper.HashString(authSession));
if (authSession == null)
{
NetworkCredential NC = credentials.GetCredential(httpWebRequest.ChallengedUri, Signature);
GlobalLog.Print("NtlmClient::Authenticate() GetCredential() returns:" + ValidationHelper.ToString(NC));
if (NC == null)
{
return(null);
}
string username = NC.UserName;
if (username == null || (username.Length == 0 && !(NC is SystemNetworkCredential)))
{
return(null);
}
//
// here we cover a hole in the SSPI layer. longer credentials
// might corrupt the process and cause a reboot.
//
if (username.Length + NC.Password.Length + NC.Domain.Length > NtlmClient.MaxNtlmCredentialSize)
{
//
// rather then throwing an exception here we return null so other packages can be used.
// this is questionable, hence:
// Consider: make this throw a NotSupportedException so it is discoverable
//
return(null);
}
authSession =
new NTAuthentication(
AuthType,
NC,
null,
httpWebRequest.DelegationFix);
GlobalLog.Print("NtlmClient::Authenticate() adding authSession:" + ValidationHelper.HashString(authSession) + " for:" + ValidationHelper.HashString(httpWebRequest.CurrentAuthenticationState));
sessions.Add(httpWebRequest.CurrentAuthenticationState, authSession);
}
bool handshakeComplete;
string clientResponse = authSession.GetOutgoingBlob(incoming, out handshakeComplete);
if (clientResponse == null)
{
return(null);
}
if (httpWebRequest.UnsafeAuthenticatedConnectionSharing)
{
httpWebRequest.LockConnection = true;
}
return(AuthenticationManager.GetGroupAuthorization(this, AuthType + " " + clientResponse, false, authSession, httpWebRequest.UnsafeAuthenticatedConnectionSharing));
}