Monday, February 9, 2015

SOAP Only Authentication Using C#

 
In most cases when writing code to connect to Dynamics CRM you'll hit up the SDK assemblies so you can establish your connection and get down to business in just a few lines of code. Inevitably there will be situations where using the those assemblies might not be an option, case in point non-.NET languages.

Obviously authentication is the first major problem that needs to be solved before you can get into the meat of your application. If you browse through the CRM SDK under the "Write mobile and modern apps" topic you'll notice that using OAuth is the recommended approach to authentication. Which is fine but in order to do so you'll need to register your application ahead of time with Active Directory (Online or On Premise) which isn't always desirable or possible.

An alternative approach is to communicate with CRM using raw SOAP requests. Using this approach we can authenticate to CRM Online or On Premise IFD organizations with a user's same credentials and return back the correct security tokens that need to accompany any future requests. Obviously working directly with the SOAP XML isn't that pretty but it can be done. This should provide a starting point for converting to other languages. I'll be posting examples in the near future for PHP, Java, JavaScript (mobile application), and VBA.

I've put together a couple of sample applications, the first is a C# console application that can authenticate to CRM using SOAP requests and then returns back the name of the logged in user.

https://github.com/jlattimer/CRMSoapAuthCSharp

The second is a mobile application using the Xamarin platform. If you aren't familiar with Xamarin it allows you to develop native iOS, Android, and Windows mobile applications using C# and Visual Studio. Unfortunately for us CRM developers the SDK assemblies have dependencies on other .NET assemblies that are not supported by Xamarin which makes the standard versions of the CRM SDK assemblies not viable (mobile versions here + other mobile samples). Full disclosure: Xamarin supports the developer community by giving Microsoft MVPs complimentary licenses - which I appreciate greatly!

The second sample does the same thing except it is in the form of a Xamarin iOS (requires Xamarin to run) application.

https://github.com/jlattimer/CRMSoapAuthXamarin

The heavy lifting for generating the SOAP headers looks like this:

  using System;
  using System.IO;
  using System.Net;
  using System.Security.Cryptography;
  using System.Text;
  using System.Xml;
   
  namespace CRMSoapAuthCSharp
  {
  class CrmAuth
  {
  /// <summary>
  /// Gets a CRM Online SOAP header & expiration.
  /// </summary>
  /// <param name="username">Username of a valid CRM user.</param>
  /// <param name="password">Password of a valid CRM user.</param>
  /// <param name="url">The Url of the CRM Online organization (https://org.crm.dynamics.com).</param>
  /// <returns>An object containing the SOAP header and expiration date/time of the header.</returns>
  public CrmAuthenticationHeader GetHeaderOnline(string username, string password, string url)
  {
  if (!url.EndsWith("/"))
  url += "/";
   
  string urnAddress = GetUrnOnline(url);
  DateTime now = DateTime.Now;
   
  StringBuilder xml = new StringBuilder();
  xml.Append("<s:Envelope xmlns:s=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:a=\"http://www.w3.org/2005/08/addressing\" xmlns:u=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd\">");
  xml.Append("<s:Header>");
  xml.Append("<a:Action s:mustUnderstand=\"1\">http://schemas.xmlsoap.org/ws/2005/02/trust/RST/Issue</a:Action>");
  xml.Append("<a:MessageID>urn:uuid:" + Guid.NewGuid() + "</a:MessageID>");
  xml.Append("<a:ReplyTo>");
  xml.Append("<a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>");
  xml.Append("</a:ReplyTo>");
  xml.Append("<a:To s:mustUnderstand=\"1\">https://login.microsoftonline.com/RST2.srf</a:To>");
  xml.Append("<o:Security s:mustUnderstand=\"1\" xmlns:o=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\">");
  xml.Append("<u:Timestamp u:Id=\"_0\">");
  xml.Append("<u:Created>" + now.ToUniversalTime().ToString("o") + "</u:Created>");
  xml.Append("<u:Expires>" + now.AddMinutes(60).ToUniversalTime().ToString("o") + "</u:Expires>");
  xml.Append("</u:Timestamp>");
  xml.Append("<o:UsernameToken u:Id=\"uuid-" + Guid.NewGuid() + "-1\">");
  xml.Append("<o:Username>" + username + "</o:Username>");
  xml.Append("<o:Password>" + password + "</o:Password>");
  xml.Append("</o:UsernameToken>");
  xml.Append("</o:Security>");
  xml.Append("</s:Header>");
  xml.Append("<s:Body>");
  xml.Append("<trust:RequestSecurityToken xmlns:trust=\"http://schemas.xmlsoap.org/ws/2005/02/trust\">");
  xml.Append("<wsp:AppliesTo xmlns:wsp=\"http://schemas.xmlsoap.org/ws/2004/09/policy\">");
  xml.Append("<a:EndpointReference>");
  xml.Append("<a:Address>urn:" + urnAddress + "</a:Address>");
  xml.Append("</a:EndpointReference>");
  xml.Append("</wsp:AppliesTo>");
  xml.Append("<trust:RequestType>http://schemas.xmlsoap.org/ws/2005/02/trust/Issue</trust:RequestType>");
  xml.Append("</trust:RequestSecurityToken>");
  xml.Append("</s:Body>");
  xml.Append("</s:Envelope>");
   
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://login.microsoftonline.com/RST2.srf");
  ASCIIEncoding encoding = new ASCIIEncoding();
   
  byte[] bytesToWrite = encoding.GetBytes(xml.ToString());
  request.Method = "POST";
  request.ContentLength = bytesToWrite.Length;
  request.ContentType = "application/soap+xml; charset=UTF-8";
   
  Stream newStream = request.GetRequestStream();
  newStream.Write(bytesToWrite, 0, bytesToWrite.Length);
  newStream.Close();
   
  HttpWebResponse response = (HttpWebResponse)request.GetResponse();
  Stream dataStream = response.GetResponseStream();
   
  if (dataStream == null)
  return null;
   
  StreamReader reader = new StreamReader(dataStream);
   
  XmlDocument x = new XmlDocument();
  x.Load(reader);
   
  XmlNodeList cipherElements = x.GetElementsByTagName("CipherValue");
  string token1 = cipherElements[0].InnerText;
  string token2 = cipherElements[1].InnerText;
   
  XmlNodeList keyIdentiferElements = x.GetElementsByTagName("wsse:KeyIdentifier");
  string keyIdentifer = keyIdentiferElements[0].InnerText;
   
  XmlNodeList tokenExpiresElements = x.GetElementsByTagName("wsu:Expires");
  string tokenExpires = tokenExpiresElements[0].InnerText;
   
  CrmAuthenticationHeader authHeader = new CrmAuthenticationHeader
  {
  Header = CreateSoapHeaderOnline(url, keyIdentifer, token1, token2),
  Expires = DateTimeOffset.Parse(tokenExpires).UtcDateTime
  };
   
  return authHeader;
  }
   
  /// <summary>
  /// Gets a CRM Online SOAP header.
  /// </summary>
  /// <param name="url">The Url of the CRM Online organization (https://org.crm.dynamics.com).</param>
  /// <param name="keyIdentifer">The KeyIdentifier from the initial request.</param>
  /// <param name="token1">The first token from the initial request.</param>
  /// <param name="token2">The second token from the initial request.</param>
  /// <returns>The XML SOAP header to be used in future requests.</returns>
  private static string CreateSoapHeaderOnline(string url, string keyIdentifer, string token1, string token2)
  {
  StringBuilder xml = new StringBuilder();
  xml.Append("<s:Header>");
  xml.Append("<a:Action s:mustUnderstand=\"1\">http://schemas.microsoft.com/xrm/2011/Contracts/Services/IOrganizationService/Execute</a:Action>");
  xml.Append("<Security xmlns=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\">");
  xml.Append("<EncryptedData Id=\"Assertion0\" Type=\"http://www.w3.org/2001/04/xmlenc#Element\" xmlns=\"http://www.w3.org/2001/04/xmlenc#\">");
  xml.Append("<EncryptionMethod Algorithm=\"http://www.w3.org/2001/04/xmlenc#tripledes-cbc\"/>");
  xml.Append("<ds:KeyInfo xmlns:ds=\"http://www.w3.org/2000/09/xmldsig#\">");
  xml.Append("<EncryptedKey>");
  xml.Append("<EncryptionMethod Algorithm=\"http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p\"/>");
  xml.Append("<ds:KeyInfo Id=\"keyinfo\">");
  xml.Append("<wsse:SecurityTokenReference xmlns:wsse=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\">");
  xml.Append("<wsse:KeyIdentifier EncodingType=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary\" ValueType=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509SubjectKeyIdentifier\">" + keyIdentifer + "</wsse:KeyIdentifier>");
  xml.Append("</wsse:SecurityTokenReference>");
  xml.Append("</ds:KeyInfo>");
  xml.Append("<CipherData>");
  xml.Append("<CipherValue>" + token1 + "</CipherValue>");
  xml.Append("</CipherData>");
  xml.Append("</EncryptedKey>");
  xml.Append("</ds:KeyInfo>");
  xml.Append("<CipherData>");
  xml.Append("<CipherValue>" + token2 + "</CipherValue>");
  xml.Append("</CipherData>");
  xml.Append("</EncryptedData>");
  xml.Append("</Security>");
  xml.Append("<a:MessageID>urn:uuid:" + Guid.NewGuid() + "</a:MessageID>");
  xml.Append("<a:ReplyTo>");
  xml.Append("<a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>");
  xml.Append("</a:ReplyTo>");
  xml.Append("<a:To s:mustUnderstand=\"1\">" + url + "XRMServices/2011/Organization.svc</a:To>");
  xml.Append("</s:Header>");
  return xml.ToString();
  }
   
  /// <summary>
  /// Gets the correct URN Address based on the Online region.
  /// </summary>
  /// <param name="url">The Url of the CRM Online organization (https://org.crm.dynamics.com).</param>
  /// <returns>URN Address.</returns>
  private static string GetUrnOnline(string url)
  {
  if (url.ToUpper().Contains("CRM2.DYNAMICS.COM"))
  return "crmsam:dynamics.com";
  if (url.ToUpper().Contains("CRM4.DYNAMICS.COM"))
  return "crmemea:dynamics.com";
  if (url.ToUpper().Contains("CRM5.DYNAMICS.COM"))
  return "crmapac:dynamics.com";
   
  return "crmna:dynamics.com";
  }
   
  /// <summary>
  /// Gets a CRM On Premise SOAP header & expiration.
  /// </summary>
  /// <param name="username">Username of a valid CRM user.</param>
  /// <param name="password">Password of a valid CRM user.</param>
  /// <param name="url">The Url of the CRM On Premise (IFD) organization (https://org.domain.com).</param>
  /// <returns>An object containing the SOAP header and expiration date/time of the header.</returns>
  public CrmAuthenticationHeader GetHeaderOnPremise(string username, string password, string url)
  {
  if (!url.EndsWith("/"))
  url += "/";
  string adfsUrl = GetAdfs(url);
  if (adfsUrl == null)
  return null;
   
  DateTime now = DateTime.Now;
  string urnAddress = url + "XRMServices/2011/Organization.svc";
  string usernamemixed = adfsUrl + "/13/usernamemixed";
   
  StringBuilder xml = new StringBuilder();
  xml.Append("<s:Envelope xmlns:s=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:a=\"http://www.w3.org/2005/08/addressing\">");
  xml.Append("<s:Header>");
  xml.Append("<a:Action s:mustUnderstand=\"1\">http://docs.oasis-open.org/ws-sx/ws-trust/200512/RST/Issue</a:Action>");
  xml.Append("<a:MessageID>urn:uuid:" + Guid.NewGuid() + "</a:MessageID>");
  xml.Append("<a:ReplyTo>");
  xml.Append("<a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>");
  xml.Append("</a:ReplyTo>");
  xml.Append("<Security s:mustUnderstand=\"1\" xmlns:u=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd\" xmlns=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\">");
  xml.Append("<u:Timestamp u:Id=\"" + Guid.NewGuid() + "\">");
  xml.Append("<u:Created>" + now.ToUniversalTime().ToString("o") + "</u:Created>");
  xml.Append("<u:Expires>" + now.AddMinutes(60).ToUniversalTime().ToString("o") + "</u:Expires>");
  xml.Append("</u:Timestamp>");
  xml.Append("<UsernameToken u:Id=\"" + Guid.NewGuid() + "\">");
  xml.Append("<Username>" + username + "</Username>");
  xml.Append("<Password Type=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText\">" + password + "</Password>");
  xml.Append("</UsernameToken>");
  xml.Append("</Security>");
  xml.Append("<a:To s:mustUnderstand=\"1\">" + usernamemixed + "</a:To>");
  xml.Append("</s:Header>");
  xml.Append("<s:Body>");
  xml.Append("<trust:RequestSecurityToken xmlns:trust=\"http://docs.oasis-open.org/ws-sx/ws-trust/200512\">");
  xml.Append("<wsp:AppliesTo xmlns:wsp=\"http://schemas.xmlsoap.org/ws/2004/09/policy\">");
  xml.Append("<a:EndpointReference>");
  xml.Append("<a:Address>" + urnAddress + "</a:Address>");
  xml.Append("</a:EndpointReference>");
  xml.Append("</wsp:AppliesTo>");
  xml.Append("<trust:RequestType>http://docs.oasis-open.org/ws-sx/ws-trust/200512/Issue</trust:RequestType>");
  xml.Append("</trust:RequestSecurityToken>");
  xml.Append("</s:Body>");
  xml.Append("</s:Envelope>");
   
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create(usernamemixed);
  ASCIIEncoding encoding = new ASCIIEncoding();
   
  byte[] bytesToWrite = encoding.GetBytes(xml.ToString());
  request.Method = "POST";
  request.ContentLength = bytesToWrite.Length;
  request.ContentType = "application/soap+xml; charset=UTF-8";
   
  Stream newStream = request.GetRequestStream();
  newStream.Write(bytesToWrite, 0, bytesToWrite.Length);
  newStream.Close();
   
  HttpWebResponse response = (HttpWebResponse)request.GetResponse();
  Stream dataStream = response.GetResponseStream();
   
  if (dataStream == null)
  return null;
   
  StreamReader reader = new StreamReader(dataStream);
   
  XmlDocument x = new XmlDocument();
  x.Load(reader);
   
  XmlNodeList cipherValue1 = x.GetElementsByTagName("e:CipherValue");
  string token1 = cipherValue1[0].InnerText;
   
  XmlNodeList cipherValue2 = x.GetElementsByTagName("xenc:CipherValue");
  string token2 = cipherValue2[0].InnerText;
   
  XmlNodeList keyIdentiferElements = x.GetElementsByTagName("o:KeyIdentifier");
  string keyIdentifer = keyIdentiferElements[0].InnerText;
   
  XmlNodeList x509IssuerNameElements = x.GetElementsByTagName("X509IssuerName");
  string x509IssuerName = x509IssuerNameElements[0].InnerText;
   
  XmlNodeList x509SerialNumberElements = x.GetElementsByTagName("X509SerialNumber");
  string x509SerialNumber = x509SerialNumberElements[0].InnerText;
   
  XmlNodeList binarySecretElements = x.GetElementsByTagName("trust:BinarySecret");
  string binarySecret = binarySecretElements[0].InnerText;
   
  string created = now.AddMinutes(-1).ToUniversalTime().ToString("o");
  string expires = now.AddMinutes(60).ToUniversalTime().ToString("o");
  string timestamp = "<u:Timestamp xmlns:u=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd\" u:Id=\"_0\"><u:Created>" + created + "</u:Created><u:Expires>" + expires + "</u:Expires></u:Timestamp>";
   
  SHA1CryptoServiceProvider sha1Hasher = new SHA1CryptoServiceProvider();
  byte[] hashedDataBytes = sha1Hasher.ComputeHash(Encoding.UTF8.GetBytes(timestamp));
  string digestValue = Convert.ToBase64String(hashedDataBytes);
   
  string signedInfo = "<SignedInfo xmlns=\"http://www.w3.org/2000/09/xmldsig#\"><CanonicalizationMethod Algorithm=\"http://www.w3.org/2001/10/xml-exc-c14n#\"></CanonicalizationMethod><SignatureMethod Algorithm=\"http://www.w3.org/2000/09/xmldsig#hmac-sha1\"></SignatureMethod><Reference URI=\"#_0\"><Transforms><Transform Algorithm=\"http://www.w3.org/2001/10/xml-exc-c14n#\"></Transform></Transforms><DigestMethod Algorithm=\"http://www.w3.org/2000/09/xmldsig#sha1\"></DigestMethod><DigestValue>" + digestValue + "</DigestValue></Reference></SignedInfo>";
  byte[] signedInfoBytes = Encoding.UTF8.GetBytes(signedInfo);
  HMACSHA1 hmac = new HMACSHA1();
  byte[] binarySecretBytes = Convert.FromBase64String(binarySecret);
  hmac.Key = binarySecretBytes;
  byte[] hmacHash = hmac.ComputeHash(signedInfoBytes);
  string signatureValue = Convert.ToBase64String(hmacHash);
   
  XmlNodeList tokenExpiresElements = x.GetElementsByTagName("wsu:Expires");
  CrmAuthenticationHeader authHeader = new CrmAuthenticationHeader
  {
  Expires =
  DateTime.ParseExact(tokenExpiresElements[0].InnerText, "yyyy-MM-ddTHH:mm:ss.fffK", null)
  .ToUniversalTime(),
  Header = CreateSoapHeaderOnPremise(url, keyIdentifer, token1, token2, x509IssuerName,
  x509SerialNumber, signatureValue, digestValue, created, expires)
  };
   
  return authHeader;
  }
   
  /// <summary>
  /// Gets a CRM On Premise (IFD) SOAP header.
  /// </summary>
  /// <param name="url">The CRM On Premise URL ("https://org.domain.com/").</param>
  /// <param name="keyIdentifer">The KeyIdentifier from the initial request.</param>
  /// <param name="token1">The first token from the initial request.</param>
  /// <param name="token2">The second token from the initial request.</param>
  /// <param name="issuerNameX509">The certificate issuer.</param>
  /// <param name="serialNumberX509">The certificate serial number.</param>
  /// <param name="signatureValue">The hashsed value of the header signature.</param>
  /// <param name="digestValue">The hashed value of the header timestamp.</param>
  /// <param name="created">The header created date/time.</param>
  /// <param name="expires">The header expiration date/tim.</param>
  /// <returns>SOAP Header XML.</returns>
  private static string CreateSoapHeaderOnPremise(string url, string keyIdentifer, string token1, string token2, string issuerNameX509, string serialNumberX509, string signatureValue, string digestValue, string created, string expires)
  {
  StringBuilder xml = new StringBuilder();
  xml.Append("<s:Header>");
  xml.Append("<a:Action s:mustUnderstand=\"1\">http://schemas.microsoft.com/xrm/2011/Contracts/Services/IOrganizationService/Execute</a:Action>");
  xml.Append("<a:MessageID>urn:uuid:" + Guid.NewGuid() + "</a:MessageID>");
  xml.Append("<a:ReplyTo>");
  xml.Append("<a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>");
  xml.Append("</a:ReplyTo>");
  xml.Append("<a:To s:mustUnderstand=\"1\">" + url + "XRMServices/2011/Organization.svc</a:To>");
  xml.Append("<o:Security xmlns:o=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\">");
  xml.Append("<u:Timestamp xmlns:u=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd\" u:Id=\"_0\">");
  xml.Append("<u:Created>" + created + "</u:Created>");
  xml.Append("<u:Expires>" + expires + "</u:Expires>");
  xml.Append("</u:Timestamp>");
  xml.Append("<xenc:EncryptedData Type=\"http://www.w3.org/2001/04/xmlenc#Element\" xmlns:xenc=\"http://www.w3.org/2001/04/xmlenc#\">");
  xml.Append("<xenc:EncryptionMethod Algorithm=\"http://www.w3.org/2001/04/xmlenc#aes256-cbc\"/>");
  xml.Append("<KeyInfo xmlns=\"http://www.w3.org/2000/09/xmldsig#\">");
  xml.Append("<e:EncryptedKey xmlns:e=\"http://www.w3.org/2001/04/xmlenc#\">");
  xml.Append("<e:EncryptionMethod Algorithm=\"http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p\">");
  xml.Append("<DigestMethod Algorithm=\"http://www.w3.org/2000/09/xmldsig#sha1\"/>");
  xml.Append("</e:EncryptionMethod>");
  xml.Append("<KeyInfo>");
  xml.Append("<o:SecurityTokenReference xmlns:o=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\">");
  xml.Append("<X509Data>");
  xml.Append("<X509IssuerSerial>");
  xml.Append("<X509IssuerName>" + issuerNameX509 + "</X509IssuerName>");
  xml.Append("<X509SerialNumber>" + serialNumberX509 + "</X509SerialNumber>");
  xml.Append("</X509IssuerSerial>");
  xml.Append("</X509Data>");
  xml.Append("</o:SecurityTokenReference>");
  xml.Append("</KeyInfo>");
  xml.Append("<e:CipherData>");
  xml.Append("<e:CipherValue>" + token1 + "</e:CipherValue>");
  xml.Append("</e:CipherData>");
  xml.Append("</e:EncryptedKey>");
  xml.Append("</KeyInfo>");
  xml.Append("<xenc:CipherData>");
  xml.Append("<xenc:CipherValue>" + token2 + "</xenc:CipherValue>");
  xml.Append("</xenc:CipherData>");
  xml.Append("</xenc:EncryptedData>");
  xml.Append("<Signature xmlns=\"http://www.w3.org/2000/09/xmldsig#\">");
  xml.Append("<SignedInfo>");
  xml.Append("<CanonicalizationMethod Algorithm=\"http://www.w3.org/2001/10/xml-exc-c14n#\"/>");
  xml.Append("<SignatureMethod Algorithm=\"http://www.w3.org/2000/09/xmldsig#hmac-sha1\"/>");
  xml.Append("<Reference URI=\"#_0\">");
  xml.Append("<Transforms>");
  xml.Append("<Transform Algorithm=\"http://www.w3.org/2001/10/xml-exc-c14n#\"/>");
  xml.Append("</Transforms>");
  xml.Append("<DigestMethod Algorithm=\"http://www.w3.org/2000/09/xmldsig#sha1\"/>");
  xml.Append("<DigestValue>" + digestValue + "</DigestValue>");
  xml.Append("</Reference>");
  xml.Append("</SignedInfo>");
  xml.Append("<SignatureValue>" + signatureValue + "</SignatureValue>");
  xml.Append("<KeyInfo>");
  xml.Append("<o:SecurityTokenReference xmlns:o=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\">");
  xml.Append("<o:KeyIdentifier ValueType=\"http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.0#SAMLAssertionID\">" + keyIdentifer + "</o:KeyIdentifier>");
  xml.Append("</o:SecurityTokenReference>");
  xml.Append("</KeyInfo>");
  xml.Append("</Signature>");
  xml.Append("</o:Security>");
  xml.Append("</s:Header>");
   
  return xml.ToString();
  }
   
  /// <summary>
  /// Gets the name of the ADFS server CRM uses for authentication.
  /// </summary>
  /// <param name="url">The Url of the CRM On Premise (IFD) organization (https://org.domain.com).</param>
  /// <returns>The AD FS server url.</returns>
  private static string GetAdfs(string url)
  {
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + "/XrmServices/2011/Organization.svc?wsdl=wsdl0");
  request.Method = "GET";
  HttpWebResponse response = (HttpWebResponse)request.GetResponse();
  Stream dataStream = response.GetResponseStream();
  if (dataStream == null)
  return null;
   
  StreamReader reader = new StreamReader(dataStream);
   
  XmlDocument x = new XmlDocument();
  x.Load(reader);
   
  XmlNodeList nodes = x.GetElementsByTagName("ms-xrm:Identifier");
  foreach (XmlNode node in nodes)
  {
  return node.FirstChild.InnerText.Replace("http://", "https://");
  }
   
  return null;
  }
  }
  }
原始路径：https://jlattimer.blogspot.com/2015/02/soap-only-authentication-using-c.html

 

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