private HttpCredentialsHeaderValue GetAuthorizationHeader(DigestAuthParameters authParameters)
{
string nonceCounterString = string.Format("{0:x08}", authParameters.NonceCounter++);
var authorizationHeader = new HttpCredentialsHeaderValue("Digest");
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("username", UserName));
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("realm", authParameters.Realm));
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("qop", "auth"));
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("uri", authParameters.Uri));
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("nonce", authParameters.Nonce));
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("nc", nonceCounterString));
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("cnonce", authParameters.Cnonce));
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("algorithm", authParameters.Algorithm));
if (!String.IsNullOrEmpty(authParameters.Opaque))
{
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("opaque", authParameters.Opaque));
}
var a1 = string.Format("{0}:{1}:{2}", UserName, authParameters.Realm, Password);
string a2 = string.Format("POST:{0}", authParameters.Uri);
string ha1 = GetMD5HashBinHex(a1);
string ha2 = GetMD5HashBinHex(a2);
string a = string.Format("{0}:{1}:{4}:{2}:auth:{3}", ha1, authParameters.Nonce, authParameters.Cnonce, ha2,
nonceCounterString);
string responseVal = GetMD5HashBinHex(a);
authorizationHeader.Parameters.Add(new HttpNameValueHeaderValue("response", responseVal));
return(authorizationHeader);
}
private DigestAuthParameters InitDigestAuthParameters(HttpChallengeHeaderValue authHeader,
HttpResponseMessage response)
{
var authParameters = new DigestAuthParameters();
foreach (var headerValue in authHeader.Parameters)
{
switch (headerValue.Name)
{
case "realm":
authParameters.Realm = headerValue.Value;
break;
case "nonce":
authParameters.Nonce = headerValue.Value;
break;
case "algorithm":
authParameters.Algorithm = headerValue.Value;
break;
case "opaque":
authParameters.Opaque = headerValue.Value;
break;
}
}
if (String.IsNullOrEmpty(authParameters.Algorithm))
{
authParameters.Algorithm = "MD5";
}
authParameters.Uri = response.RequestMessage.RequestUri.AbsolutePath;
authParameters.Cnonce = GetNonce();
return(authParameters);
}
