internal string ToBlob()
{
StringBuilder builder = new StringBuilder();
builder.Append(HttpDigest.pair("realm", this.Realm, true));
if (this.Algorithm != null)
{
builder.Append(",");
builder.Append(HttpDigest.pair("algorithm", this.Algorithm, true));
}
if (this.Charset != null)
{
builder.Append(",");
builder.Append(HttpDigest.pair("charset", this.Charset, false));
}
if (this.Nonce != null)
{
builder.Append(",");
builder.Append(HttpDigest.pair("nonce", this.Nonce, true));
}
if (this.Uri != null)
{
builder.Append(",");
builder.Append(HttpDigest.pair("uri", this.Uri, true));
}
if (this.ClientNonce != null)
{
builder.Append(",");
builder.Append(HttpDigest.pair("cnonce", this.ClientNonce, true));
}
if (this.NonceCount > 0)
{
builder.Append(",");
builder.Append(HttpDigest.pair("nc", this.NonceCount.ToString("x8", NumberFormatInfo.InvariantInfo), true));
}
if (this.QualityOfProtection != null)
{
builder.Append(",");
builder.Append(HttpDigest.pair("qop", this.QualityOfProtection, true));
}
if (this.Opaque != null)
{
builder.Append(",");
builder.Append(HttpDigest.pair("opaque", this.Opaque, true));
}
if (this.Domain != null)
{
builder.Append(",");
builder.Append(HttpDigest.pair("domain", this.Domain, true));
}
if (this.Stale)
{
builder.Append(",");
builder.Append(HttpDigest.pair("stale", "true", true));
}
return(builder.ToString());
}
private static string RefineDigestChallenge(string challenge, int index)
{
string str = null;
int num4;
if ((challenge == null) || (index >= challenge.Length))
{
throw new ArgumentOutOfRangeException("challenge", challenge);
}
int startIndex = index + SignatureSize;
if ((challenge.Length > startIndex) && (challenge[startIndex] != ','))
{
startIndex++;
}
else
{
index = -1;
}
if ((index < 0) || (challenge.Length <= startIndex))
{
throw new ArgumentOutOfRangeException("challenge", challenge);
}
str = challenge.Substring(startIndex);
int num3 = 0;
bool flag = true;
HttpDigestChallenge challenge2 = new HttpDigestChallenge();
Label_0070:
num4 = num3;
index = AuthenticationManager.SplitNoQuotes(str, ref num4);
if (num4 >= 0)
{
string str3;
string name = str.Substring(num3, num4 - num3);
if (index < 0)
{
str3 = HttpDigest.unquote(str.Substring(num4 + 1));
}
else
{
str3 = HttpDigest.unquote(str.Substring(num4 + 1, (index - num4) - 1));
}
flag = challenge2.defineAttribute(name, str3);
if ((index >= 0) && flag)
{
num3 = ++index;
goto Label_0070;
}
}
if ((!flag || (num4 < 0)) && (num3 < str.Length))
{
str = (num3 > 0) ? str.Substring(0, num3 - 1) : "";
}
return(str);
}
public Authorization PreAuthenticate(WebRequest webRequest, ICredentials credentials)
{
GlobalLog.Print("DigestClient::PreAuthenticate()");
#if XP_WDIGEST
if (ComNetOS.IsPostWin2K)
{
return(XPDigestClient.PreAuthenticate(webRequest, credentials));
}
#endif // #if XP_WDIGEST
GlobalLog.Assert(credentials != null, "DigestClient::PreAuthenticate() credentials==null", "");
if (credentials == null || credentials is SystemNetworkCredential)
{
return(null);
}
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
GlobalLog.Assert(httpWebRequest != null, "DigestClient::PreAuthenticate() httpWebRequest==null", "");
if (httpWebRequest == null)
{
return(null);
}
HttpDigestChallenge storedHDC = (HttpDigestChallenge)challengeCache.Lookup(httpWebRequest.ChallengedUri.AbsoluteUri);
if (storedHDC == null)
{
return(null);
}
HttpDigestChallenge modifiedHDC = storedHDC.CopyAndIncrementNonce();
modifiedHDC.HostName = httpWebRequest.ChallengedUri.Host;
modifiedHDC.Method = httpWebRequest.CurrentMethod;
// Consider:
// I have also tried PathAndQuery against both IIS 5.0 and IIS 6.0 servers.
// it didn't make a difference. PathAndQuery is a more complete piece of information
// investigate with Kevin Damour if WDigest.dll wants the quesry string or not.
modifiedHDC.Uri = httpWebRequest.Address.AbsolutePath;
modifiedHDC.ChallengedUri = httpWebRequest.ChallengedUri;
Authorization digestResponse = HttpDigest.Authenticate(modifiedHDC, credentials);
return(digestResponse);
}
public bool Update(string challenge, WebRequest webRequest)
{
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
if (httpWebRequest.CurrentAuthenticationState.GetSecurityContext(this) != null)
{
return(this.XPUpdate(challenge, httpWebRequest));
}
if (httpWebRequest.ResponseStatusCode != httpWebRequest.CurrentAuthenticationState.StatusCodeMatch)
{
ChannelBinding channelBinding = null;
if (httpWebRequest.CurrentAuthenticationState.TransportContext != null)
{
channelBinding = httpWebRequest.CurrentAuthenticationState.TransportContext.GetChannelBinding(ChannelBindingKind.Endpoint);
}
httpWebRequest.ServicePoint.SetCachedChannelBinding(httpWebRequest.ChallengedUri, channelBinding);
return(true);
}
int startingPoint = (challenge == null) ? -1 : AuthenticationManager.FindSubstringNotInQuotes(challenge, Signature);
if (startingPoint < 0)
{
return(true);
}
int startIndex = startingPoint + SignatureSize;
if ((challenge.Length > startIndex) && (challenge[startIndex] != ','))
{
startIndex++;
}
else
{
startingPoint = -1;
}
if ((startingPoint >= 0) && (challenge.Length > startIndex))
{
challenge.Substring(startIndex);
}
HttpDigestChallenge challenge2 = HttpDigest.Interpret(challenge, startingPoint, httpWebRequest);
return((challenge2 == null) || !challenge2.Stale);
}
//
// CONSIDER V.NEXT
// creating a static hashtable for server nonces and keep track of nonce count
//
public static Authorization Authenticate(HttpDigestChallenge digestChallenge, ICredentials credentials)
{
NetworkCredential NC = credentials.GetCredential(digestChallenge.ChallengedUri, DigestClient.Signature);
GlobalLog.Print("HttpDigest::Authenticate() GetCredential() returns:" + ValidationHelper.ToString(NC));
if (NC == null)
{
return(null);
}
string username = NC.UserName;
if (ValidationHelper.IsBlankString(username))
{
return(null);
}
string password = NC.Password;
if (digestChallenge.QopPresent)
{
if (digestChallenge.ClientNonce == null || digestChallenge.Stale)
{
GlobalLog.Print("HttpDigest::Authenticate() QopPresent:True, need new nonce. digestChallenge.ClientNonce:" + ValidationHelper.ToString(digestChallenge.ClientNonce) + " digestChallenge.Stale:" + digestChallenge.Stale.ToString());
digestChallenge.ClientNonce = createNonce(32);
digestChallenge.NonceCount = 1;
}
else
{
GlobalLog.Print("HttpDigest::Authenticate() QopPresent:True, reusing nonce. digestChallenge.NonceCount:" + digestChallenge.NonceCount.ToString());
digestChallenge.NonceCount++;
}
}
StringBuilder authorization = new StringBuilder();
//
// look at username & password, if it's not ASCII we need to attempt some
// kind of encoding because we need to calculate the hash on byte[]
//
Charset usernameCharset = DetectCharset(username);
if (!digestChallenge.UTF8Charset && usernameCharset == Charset.UTF8)
{
GlobalLog.Print("HttpDigest::Authenticate() can't authenticate with UNICODE username. failing auth.");
return(null);
}
Charset passwordCharset = DetectCharset(password);
if (!digestChallenge.UTF8Charset && passwordCharset == Charset.UTF8)
{
GlobalLog.Print("HttpDigest::Authenticate() can't authenticate with UNICODE password. failing auth.");
return(null);
}
if (digestChallenge.UTF8Charset)
{
// on the wire always use UTF8 when the server supports it
authorization.Append(pair(DA_charset, "utf-8", false));
authorization.Append(",");
if (usernameCharset == Charset.UTF8)
{
username = CharsetEncode(username, Charset.UTF8);
authorization.Append(pair(DA_username, username, true));
authorization.Append(",");
}
else
{
authorization.Append(pair(DA_username, CharsetEncode(username, Charset.UTF8), true));
authorization.Append(",");
username = CharsetEncode(username, usernameCharset);
}
}
else
{
// otherwise UTF8 is not required
username = CharsetEncode(username, usernameCharset);
authorization.Append(pair(DA_username, username, true));
authorization.Append(",");
}
password = CharsetEncode(password, passwordCharset);
// no special encoding for the realm since we're just going to echo it back (encoding must have happened on the server).
authorization.Append(pair(DA_realm, digestChallenge.Realm, true));
authorization.Append(",");
authorization.Append(pair(DA_nonce, digestChallenge.Nonce, true));
authorization.Append(",");
authorization.Append(pair(DA_uri, digestChallenge.Uri, true));
if (digestChallenge.QopPresent)
{
//
// RAID#47397
// send only the QualityOfProtection we're using
// since we support only "auth" that's what we will send out
//
if (digestChallenge.Algorithm != null)
{
//
// consider: should we default to "MD5" here? IE does
//
authorization.Append(",");
authorization.Append(pair(DA_algorithm, digestChallenge.Algorithm, true)); // IE sends quotes - IIS needs them
}
authorization.Append(",");
authorization.Append(pair(DA_cnonce, digestChallenge.ClientNonce, true));
authorization.Append(",");
authorization.Append(pair(DA_nc, digestChallenge.NonceCount.ToString("x8"), false));
authorization.Append(",");
authorization.Append(pair(DA_qop, SupportedQuality, true)); // IE sends quotes - IIS needs them
}
// warning: this must be computed here
string responseValue = HttpDigest.responseValue(digestChallenge, username, password);
if (responseValue == null)
{
return(null);
}
authorization.Append(",");
authorization.Append(pair(DA_response, responseValue, true)); // IE sends quotes - IIS needs them
if (digestChallenge.Opaque != null)
{
authorization.Append(",");
authorization.Append(pair(DA_opaque, digestChallenge.Opaque, true));
}
GlobalLog.Print("HttpDigest::Authenticate() digestChallenge.Stale:" + digestChallenge.Stale.ToString());
// completion is decided in Update()
Authorization finalAuthorization = new Authorization(DigestClient.AuthType + " " + authorization.ToString(), false);
return(finalAuthorization);
}
public Authorization Authenticate(string challenge, WebRequest webRequest, ICredentials credentials)
{
GlobalLog.Print("DigestClient::Authenticate(): " + challenge);
#if XP_WDIGEST
if (ComNetOS.IsPostWin2K)
{
return(XPDigestClient.Authenticate(challenge, webRequest, credentials));
}
#endif // #if XP_WDIGEST
GlobalLog.Assert(credentials != null, "DigestClient::Authenticate() credentials==null", "");
if (credentials == null || credentials is SystemNetworkCredential)
{
return(null);
}
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
GlobalLog.Assert(httpWebRequest != null, "DigestClient::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);
}
string[] prefixes = null;
string rootPath = httpWebRequest.ChallengedUri.Scheme + "://" + httpWebRequest.ChallengedUri.Host;
HttpDigestChallenge digestChallenge = HttpDigest.Interpret(challenge, index, httpWebRequest);
if (digestChallenge == null)
{
return(null);
}
if (digestChallenge.Domain == null)
{
challengeCache.Add(rootPath, digestChallenge);
}
else
{
prefixes = digestChallenge.Domain.Split(" ".ToCharArray());
for (int i = 0; i < prefixes.Length; i++)
{
challengeCache.Add(prefixes[i], digestChallenge);
}
}
Authorization digestResponse = HttpDigest.Authenticate(digestChallenge, credentials);
if (digestResponse != null)
{
if (prefixes == null)
{
digestResponse.ProtectionRealm = new string[1];
digestResponse.ProtectionRealm[0] = rootPath;
}
else
{
digestResponse.ProtectionRealm = prefixes;
}
}
return(digestResponse);
}
public bool Update(string challenge, WebRequest webRequest)
{
GlobalLog.Print("DigestClient::Update(): [" + challenge + "]");
#if XP_WDIGEST
if (ComNetOS.IsPostWin2K)
{
return(XPDigestClient.Update(challenge, webRequest));
}
#endif // #if XP_WDIGEST
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
GlobalLog.Assert(httpWebRequest != null, "DigestClient::Update() httpWebRequest==null", "");
GlobalLog.Assert(httpWebRequest.ChallengedUri != null, "DigestClient::Update() httpWebRequest.ChallengedUri==null", "");
// here's how we know if the handshake is complete when we get the response back,
// (keeping in mind that we need to support stale credentials):
// !40X - complete & success
// 40X & stale=false - complete & failure
// 40X & stale=true - !complete
if (httpWebRequest.ResponseStatusCode != httpWebRequest.CurrentAuthenticationState.StatusCodeMatch)
{
GlobalLog.Print("DigestClient::Update(): no status code match. returning true");
return(true);
}
int index = challenge == null ? -1 : AuthenticationManager.FindSubstringNotInQuotes(challenge.ToLower(CultureInfo.InvariantCulture), Signature);
if (index < 0)
{
GlobalLog.Print("DigestClient::Update(): no challenge. returning true");
return(true);
}
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);
}
HttpDigestChallenge digestChallenge = HttpDigest.Interpret(challenge, index, httpWebRequest);
if (digestChallenge == null)
{
GlobalLog.Print("DigestClient::Update(): not a valid digest challenge. returning true");
return(true);
}
GlobalLog.Print("DigestClient::Update(): returning digestChallenge.Stale:" + digestChallenge.Stale.ToString());
return(!digestChallenge.Stale);
}
private Authorization DoAuthenticate(string challenge, WebRequest webRequest, ICredentials credentials, bool preAuthenticate)
{
HttpDigestChallenge challenge2;
if (credentials == null)
{
return(null);
}
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
NetworkCredential credential = credentials.GetCredential(httpWebRequest.ChallengedUri, Signature);
if (credential is SystemNetworkCredential)
{
if (WDigestAvailable)
{
return(this.XPDoAuthenticate(challenge, httpWebRequest, credentials, preAuthenticate));
}
return(null);
}
if (!preAuthenticate)
{
int startingPoint = AuthenticationManager.FindSubstringNotInQuotes(challenge, Signature);
if (startingPoint < 0)
{
return(null);
}
challenge2 = HttpDigest.Interpret(challenge, startingPoint, httpWebRequest);
}
else
{
challenge2 = challengeCache.Lookup(httpWebRequest.ChallengedUri.AbsoluteUri) as HttpDigestChallenge;
}
if (challenge2 == null)
{
return(null);
}
if (!CheckQOP(challenge2))
{
if (Logging.On)
{
Logging.PrintError(Logging.Web, SR.GetString("net_log_digest_qop_not_supported", new object[] { challenge2.QualityOfProtection }));
}
return(null);
}
if (preAuthenticate)
{
challenge2 = challenge2.CopyAndIncrementNonce();
challenge2.SetFromRequest(httpWebRequest);
}
if (credential == null)
{
return(null);
}
ICredentialPolicy credentialPolicy = AuthenticationManager.CredentialPolicy;
if ((credentialPolicy != null) && !credentialPolicy.ShouldSendCredential(httpWebRequest.ChallengedUri, httpWebRequest, credential, this))
{
return(null);
}
string computeSpn = httpWebRequest.CurrentAuthenticationState.GetComputeSpn(httpWebRequest);
ChannelBinding channelBinding = null;
if (httpWebRequest.CurrentAuthenticationState.TransportContext != null)
{
channelBinding = httpWebRequest.CurrentAuthenticationState.TransportContext.GetChannelBinding(ChannelBindingKind.Endpoint);
}
Authorization authorization = HttpDigest.Authenticate(challenge2, credential, computeSpn, channelBinding);
if ((!preAuthenticate && webRequest.PreAuthenticate) && (authorization != null))
{
string[] strArray = (challenge2.Domain == null) ? new string[] { httpWebRequest.ChallengedUri.GetParts(UriComponents.SchemeAndServer, UriFormat.UriEscaped) } : challenge2.Domain.Split(singleSpaceArray);
authorization.ProtectionRealm = (challenge2.Domain == null) ? null : strArray;
for (int i = 0; i < strArray.Length; i++)
{
challengeCache.Add(strArray[i], challenge2);
}
}
return(authorization);
}
private Authorization XPDoAuthenticate(string challenge, HttpWebRequest httpWebRequest, ICredentials credentials, bool preAuthenticate)
{
NTAuthentication securityContext = null;
string incomingBlob = null;
SecurityStatus status;
if (!preAuthenticate)
{
int index = AuthenticationManager.FindSubstringNotInQuotes(challenge, Signature);
if (index < 0)
{
return(null);
}
securityContext = httpWebRequest.CurrentAuthenticationState.GetSecurityContext(this);
incomingBlob = RefineDigestChallenge(challenge, index);
}
else
{
HttpDigestChallenge challenge2 = challengeCache.Lookup(httpWebRequest.ChallengedUri.AbsoluteUri) as HttpDigestChallenge;
if (challenge2 == null)
{
return(null);
}
challenge2 = challenge2.CopyAndIncrementNonce();
challenge2.SetFromRequest(httpWebRequest);
incomingBlob = challenge2.ToBlob();
}
UriComponents uriParts = 0;
if (httpWebRequest.CurrentMethod.ConnectRequest)
{
uriParts = UriComponents.HostAndPort;
}
else if (httpWebRequest.UsesProxySemantics)
{
uriParts = UriComponents.HttpRequestUrl;
}
else
{
uriParts = UriComponents.PathAndQuery;
}
string parts = httpWebRequest.GetRemoteResourceUri().GetParts(uriParts, UriFormat.UriEscaped);
if (securityContext == null)
{
NetworkCredential credential = credentials.GetCredential(httpWebRequest.ChallengedUri, Signature);
if ((credential == null) || (!(credential is SystemNetworkCredential) && (credential.InternalGetUserName().Length == 0)))
{
return(null);
}
ICredentialPolicy credentialPolicy = AuthenticationManager.CredentialPolicy;
if ((credentialPolicy != null) && !credentialPolicy.ShouldSendCredential(httpWebRequest.ChallengedUri, httpWebRequest, credential, this))
{
return(null);
}
string computeSpn = httpWebRequest.CurrentAuthenticationState.GetComputeSpn(httpWebRequest);
ChannelBinding channelBinding = null;
if (httpWebRequest.CurrentAuthenticationState.TransportContext != null)
{
channelBinding = httpWebRequest.CurrentAuthenticationState.TransportContext.GetChannelBinding(ChannelBindingKind.Endpoint);
}
securityContext = new NTAuthentication("WDigest", credential, computeSpn, httpWebRequest, channelBinding);
httpWebRequest.CurrentAuthenticationState.SetSecurityContext(securityContext, this);
}
string str4 = securityContext.GetOutgoingDigestBlob(incomingBlob, httpWebRequest.CurrentMethod.Name, parts, null, false, false, out status);
if (str4 == null)
{
return(null);
}
Authorization authorization = new Authorization("Digest " + str4, securityContext.IsCompleted, string.Empty, securityContext.IsMutualAuthFlag);
if (!preAuthenticate && httpWebRequest.PreAuthenticate)
{
HttpDigestChallenge challenge3 = HttpDigest.Interpret(incomingBlob, -1, httpWebRequest);
string[] strArray = (challenge3.Domain == null) ? new string[] { httpWebRequest.ChallengedUri.GetParts(UriComponents.SchemeAndServer, UriFormat.UriEscaped) } : challenge3.Domain.Split(singleSpaceArray);
authorization.ProtectionRealm = (challenge3.Domain == null) ? null : strArray;
for (int i = 0; i < strArray.Length; i++)
{
challengeCache.Add(strArray[i], challenge3);
}
}
return(authorization);
}
