/// <summary>
/// Signs a message and returns a MIME encoded array of bytes containing the signature.
/// </summary>
/// <param name="arMessage"></param>
/// <param name="bPackageHeader"></param>
/// <returns></returns>
public static byte[] Sign(byte[] arMessage, string signerCert, string signerPassword, out string sContentType)
{
byte[] bInPKCS7 = new byte[0];
// get a MIME boundary
string sBoundary = MIMEBoundary();
// Get the Headers for the entire message.
sContentType = "multipart/signed; protocol=\"application/pkcs7-signature\"; micalg=\"sha1\"; boundary=\"" + sBoundary + "\"";
// Define the boundary byte array.
byte[] bBoundary = ASCIIEncoding.ASCII.GetBytes(Environment.NewLine + "--" + sBoundary + Environment.NewLine);
// Encode the header for the signature portion.
byte[] bSignatureHeader = ASCIIEncoding.ASCII.GetBytes(MIMEHeader("application/pkcs7-signature; name=\"smime.p7s\"", "base64", "attachment; filename=smime.p7s"));
// Get the signature.
byte[] bSignature = AS2Encryption.Encode(arMessage, signerCert, signerPassword);
// convert to base64
string sig = Convert.ToBase64String(bSignature) + MESSAGE_SEPARATOR;
bSignature = System.Text.ASCIIEncoding.ASCII.GetBytes(sig);
// Calculate the final footer elements.
byte[] bFinalFooter = ASCIIEncoding.ASCII.GetBytes("--" + sBoundary + "--" + Environment.NewLine);
// Concatenate all the above together to form the message.
bInPKCS7 = ConcatBytes(bBoundary, arMessage, bBoundary,
bSignatureHeader, bSignature, bFinalFooter);
return(bInPKCS7);
}
/// <summary>
/// Processes AS2 wrapped EDI message
/// </summary>
/// <param name="request">The request.</param>
/// <param name="dropLocation">The drop location.</param>
public void Process(HttpRequest request, string dropLocation)
{
string sTo = request.Headers["AS2-To"];
string sFrom = request.Headers["AS2-From"];
string dtf = $"{sFrom}_{sTo}_" + DateTime.Now.ToString("ddMMyyyy_hh_mm_ss") + ".txt";
string filename = $"AS2_transaction_{dtf}";
string extractfilename = $"AS2_transaction_extract_{dtf}";
byte[] data = request.BinaryRead(request.TotalBytes);
bool isEncrypted = request.ContentType.Contains("application/pkcs7-mime");
bool isSigned = request.ContentType.Contains("application/pkcs7-signature");
string message = string.Empty;
Log.DebugFormat($"Process\n" +
$"\tFrom : {sFrom}\n" +
$"\tTo : {sTo}\n" +
$"\tIs Signed : {isSigned}\n" +
$"\tIs Encrypted : {isEncrypted}\n" +
$"\tContentType string : {request.ContentType}\n" +
$"Dump file name : {filename}\n");
if (!isSigned && !isEncrypted) // not signed and not encrypted
{
message = System.Text.ASCIIEncoding.ASCII.GetString(data);
}
if (isEncrypted) // encrypted and signed inside
{
byte[] decryptedData;
try
{
Log.Debug("Decrypting......");
decryptedData = AS2Encryption.Decrypt(data);
Log.Debug("Decrypting SUCCESS.");
}
catch (Exception ex)
{
Log.Error($"Exception during decrypting {ex.Message}");
if (ex.InnerException != null)
{
Log.Error($"Inner Exception during decoding {ex.InnerException.Message}");
}
throw;
}
string messageWithContentTypeLineAndMIMEHeaders = System.Text.ASCIIEncoding.ASCII.GetString(decryptedData);
// when encrypted, the Content-Type line is actually stored in the start of the message
// Require multi split done by 'ExtractPayload'
// First segment is data payload - THIS IS EDIFACT/XML data
// Second payload is a public key file [Not essential]
int firstBlankLineInMessage = messageWithContentTypeLineAndMIMEHeaders.IndexOf(Environment.NewLine + Environment.NewLine);
string contentType = messageWithContentTypeLineAndMIMEHeaders.Substring(0, firstBlankLineInMessage);
message = AS2MIMEUtilities.ExtractPayload(messageWithContentTypeLineAndMIMEHeaders, contentType);
try
{
System.IO.File.WriteAllText($"{Util.ConfigValues.DropLocation}\\{extractfilename}", message);
Log.Debug($"Message Extract written to file {Util.ConfigValues.DropLocation}\\{extractfilename}");
}
catch (Exception ex)
{
Log.Error($"Failed to write message extract to file : {Util.ConfigValues.DropLocation}\\{extractfilename}\n" +
$"Exception : {ex.Message}\n");
}
string signature = "";
if (isSigned)
{
//int SecondBlankLineInMessage = message.IndexOf(Environment.NewLine + Environment.NewLine);
int signatureHeaderStart = message.IndexOf(Environment.NewLine + "--_");
string messageWithSignature = message;
Log.DebugFormat($"Message with embedded signature\n" +
$"\tSignature start found at : {signatureHeaderStart}\n" +
$"\tSignature start found invalid format : {message.IndexOf('\n' + "--_")}\n");
message = message.Substring(0, signatureHeaderStart);
string signaturePart = messageWithSignature.Substring(signatureHeaderStart);
int signatureStart = signaturePart.IndexOf(Environment.NewLine + Environment.NewLine);
signature = signaturePart.Substring(signatureStart + 4);
Log.Debug($"\n----------------------------------------------------------------------------------------------------------------------------------\n" +
$"Extracted EDI Message\n {message}\n" +
$"----------------------------------------------------------------------------------------------------------------------------------\n");
//TODO :: Kavisha - uncomment after testing
if (AS2Encryption.validateSignature(signature) == false)
{
Log.Error($"Invalid signature {signature}");
return;
}
}
else
{
int signatureHeaderStart = message.IndexOf(Environment.NewLine + "--_");
// Check if it is marked inside the mesage payload
if (signatureHeaderStart >= 0)
{
//int SecondBlankLineInMessage = message.IndexOf(Environment.NewLine + Environment.NewLine);
string messageWithSignature = message;
Log.DebugFormat($"Message with embedded signature\n" +
$"\tSignature start found at : {signatureHeaderStart}\n" +
$"\tSignature start found invalid format : {message.IndexOf('\n' + "--_")}\n");
message = message.Substring(0, signatureHeaderStart);
string signaturePart = messageWithSignature.Substring(signatureHeaderStart);
int signatureStart = signaturePart.IndexOf(Environment.NewLine + Environment.NewLine);
signature = signaturePart.Substring(signatureStart + 4);
Log.Debug($"\n----------------------------------------------------------------------------------------------------------------------------------\n" +
$"Extracted EDI Message\n {message}\n" +
$"----------------------------------------------------------------------------------------------------------------------------------\n");
//TODO :: Kavisha - uncomment after testing
if (AS2Encryption.validateSignature(signature) == false)
{
Log.Error($"Invalid signature {signature}");
return;
}
}
else
{
Log.Error("Invalid payload [Not signed]");
}
}
}
else
{
Log.Debug("Non-Encrypted..");
if (isSigned)
{
Log.Debug("Non-Encrypted signed..");
string messageWithMIMEHeaders = System.Text.ASCIIEncoding.ASCII.GetString(data);
message = AS2MIMEUtilities.ExtractPayload(messageWithMIMEHeaders, request.Headers["Content-Type"]);
Log.Debug($"Extracted message {message}");
string signaturePart = messageWithMIMEHeaders.Substring(message.Length);
string signature = AS2MIMEUtilities.ExtractPayload(signaturePart, request.Headers["Content-Type"]);
Log.Debug($"Extracted signature {signature}");
if (AS2Encryption.validateSignature(signature) == false)
{
Log.Error($"Invalid signature {signature}");
return;
}
}
}
try
{
System.IO.File.WriteAllText($"{Util.ConfigValues.DropLocation}\\{filename}", message);
}
catch (Exception ex)
{
Log.Error($"Failed to write dump to file : {Util.ConfigValues.DropLocation}\\{filename}\n" +
$"Exception : {ex.Message}\n");
}
var grammar = EdiGrammar.NewEdiFact();
var interchange = default(Interchange);
using (var stream = new StreamReader($"{Util.ConfigValues.DropLocation}\\{filename}"))
{
Quote quoteMessage = null;
try
{
interchange = new EdiSerializer().Deserialize <Interchange>(stream, grammar);
quoteMessage = interchange.QuoteMessage;
}
catch (Exception ex)
{
Log.Error($"Content to EDI deserialization error : {ex.Message}\n" +
$"Payload File : {Util.ConfigValues.DropLocation}\\{filename}\n");
throw;
}
try
{
if (quoteMessage != null)
{
if (quoteMessage.MessageName != "220")
{
return;
}
WebOrderHeaderModel webOrder = new WebOrderHeaderModel();
webOrder.AS2Identifier = request.Headers["AS2-From"];
quoteMessage.fillWebOrder(webOrder, interchange);
InsertOrderToDB(webOrder);
Log.Info("Order inserted ----------------");
Log.Info(webOrder.ToString());
}
}
catch (Exception ex)
{
Log.Error($"Order insertion error : {ex.Message}");
if (ex.InnerException != null)
{
Log.Error($"\tInner Exception : {ex.InnerException.Message}");
}
throw;
}
}
}
public HttpStatusCode SendFile(Uri uri, string filename, byte[] fileData, string from, string to, ProxySettings proxySettings
, int timeoutMs, string signingCertFilename, string signingCertPassword, string recipientPubCertFilename /*with public key*/)
{
if (String.IsNullOrEmpty(filename))
{
throw new ArgumentNullException("filename");
}
if (fileData.Length == 0)
{
throw new ArgumentException("filedata");
}
byte[] content = fileData;
//Initialise the request
HttpWebRequest http = (HttpWebRequest)WebRequest.Create(uri);
if (!String.IsNullOrEmpty(proxySettings.Name))
{
WebProxy proxy = new WebProxy(proxySettings.Name);
NetworkCredential proxyCredential = new NetworkCredential();
proxyCredential.Domain = proxySettings.Domain;
proxyCredential.UserName = proxySettings.Username;
proxyCredential.Password = proxySettings.Password;
proxy.Credentials = proxyCredential;
http.Proxy = proxy;
}
//Define the standard request objects
http.Method = "POST";
http.AllowAutoRedirect = true;
http.KeepAlive = true;
http.PreAuthenticate = false; //Means there will be two requests sent if Authentication required.
http.SendChunked = false;
http.UserAgent = "PEERCORE AGENT";
//These Headers are common to all transactions
http.Headers.Add("Mime-Version", "1.0");
http.Headers.Add("AS2-Version", "1.2");
http.Headers.Add("AS2-From", from);
http.Headers.Add("AS2-To", to);
http.Headers.Add("Subject", filename);
http.Headers.Add("Message-Id", "<AS2_" + DateTime.Now.ToString("hhmmssddd") + ">");
http.Timeout = timeoutMs;
string contentType = (Path.GetExtension(filename) == ".xml") ? "application/xml" : "application/EDIFACT";
bool encrypt = !string.IsNullOrEmpty(recipientPubCertFilename);
bool sign = !string.IsNullOrEmpty(signingCertFilename);
if (!sign && !encrypt)
{
http.Headers.Add("Content-Transfer-Encoding", "binary");
http.Headers.Add("Content-Disposition", "inline; filename=\"" + filename + "\"");
}
if (sign)
{
// Wrap the file data with a mime header
content = AS2MIMEUtilities.CreateMessage(contentType, "binary", "", content);
content = AS2MIMEUtilities.Sign(content, signingCertFilename, signingCertPassword, out contentType);
http.Headers.Add("EDIINT-Features", "multiple-attachments");
}
if (encrypt)
{
if (string.IsNullOrEmpty(recipientPubCertFilename))
{
throw new ArgumentNullException(recipientPubCertFilename, "if encrytionAlgorithm is specified then recipientCertFilename must be specified");
}
byte[] signedContentTypeHeader = System.Text.ASCIIEncoding.ASCII.GetBytes("Content-Type: " + contentType + Environment.NewLine);
byte[] contentWithContentTypeHeaderAdded = AS2MIMEUtilities.ConcatBytes(signedContentTypeHeader, content);
string ba2Str = System.Text.Encoding.Default.GetString(content);
string s1 = System.Text.Encoding.Default.GetString(signedContentTypeHeader);
string s2 = System.Text.Encoding.Default.GetString(contentWithContentTypeHeaderAdded);
content = AS2Encryption.Encrypt(contentWithContentTypeHeaderAdded, recipientPubCertFilename, EncryptionAlgorithm.DES3);
contentType += "application/pkcs7-mime; smime-type=enveloped-data; name=\"smime.p7m\"";
}
http.ContentType += contentType;
http.ContentLength = content.Length;
SendWebRequest(http, content);
return(HandleWebResponse(http));
}
public HttpStatusCode SendMDN(HttpRequest request, int timeoutMs, string signingCertFilename, string signingCertPassword)
{
try
{
string fileData = "This is an automated MDN";
byte[] content = Encoding.ASCII.GetBytes(fileData);
OrderDataService OrderDataServ = new OrderDataService();
AS2CommunicationModel commDetails = OrderDataServ.GetAS2CommunicationDetials(request.Headers["AS2-From"]);
//Initialise the request
HttpWebRequest http = (HttpWebRequest)WebRequest.Create(commDetails.AS2MDNURL);
string recipientPubCertFilename = commDetails.CertificateName;
//Define the standard request objects
http.Method = "POST";
http.AllowAutoRedirect = true;
http.KeepAlive = true;
http.PreAuthenticate = false; //Means there will be two requests sent if Authentication required.
http.SendChunked = false;
//http.UserAgent = "PEERCORE AGENT";
//These Headers are common to all transactions
http.Headers.Add("Mime-Version", "1.0");
http.Headers.Add("AS2-Version", "1.2");
//http.Headers.Add("Date", DateTime.Now.ToString());
http.Headers.Add("AS2-From", request.Headers["AS2-To"]);
http.Headers.Add("AS2-To", request.Headers["AS2-From"]);
http.Headers.Add("Subject", "PO MDN");
http.Headers.Add("Message-Id", request.Headers["Message-Id"] != null? request.Headers["Message-Id"]:"0");
http.Timeout = timeoutMs;
string contentType = "message/disposition-notification";
bool encrypt = !string.IsNullOrEmpty(recipientPubCertFilename);
bool sign = !string.IsNullOrEmpty(signingCertFilename);
if (!sign && !encrypt)
{
http.Headers.Add("Content-Transfer-Encoding", "binary");
http.Headers.Add("Content-Disposition", "inline");
}
if (sign)
{
// Wrap the file data with a mime header
content = AS2MIMEUtilities.CreateMessage(contentType, "binary", "", content);
content = AS2MIMEUtilities.Sign(content, signingCertFilename, signingCertPassword, out contentType);
http.Headers.Add("EDIINT-Features", "multiple-attachments");
}
if (encrypt)
{
string certificateFullPath = "";
if (string.IsNullOrEmpty(recipientPubCertFilename))
{
throw new ArgumentNullException(recipientPubCertFilename, "if encrytionAlgorithm is specified then recipientCertFilename must be specified");
}
else
{
certificateFullPath = ConfigValues.CertificateFilePath + recipientPubCertFilename;
}
byte[] signedContentTypeHeader = System.Text.ASCIIEncoding.ASCII.GetBytes("Content-Type: " + contentType + Environment.NewLine);
byte[] contentWithContentTypeHeaderAdded = AS2MIMEUtilities.ConcatBytes(signedContentTypeHeader, content);
string ba2Str = System.Text.Encoding.Default.GetString(content);
string s1 = System.Text.Encoding.Default.GetString(signedContentTypeHeader);
string s2 = System.Text.Encoding.Default.GetString(contentWithContentTypeHeaderAdded);
content = AS2Encryption.EncryptMDN(contentWithContentTypeHeaderAdded, certificateFullPath, EncryptionAlgorithm.DES3);
// contentType += "multipart/report; report-type=disposition-notification; boundary=\"fredi.boundary.mult.sig.mdn\"; charset=utf-8";
}
http.ContentType += contentType;
http.ContentLength = content.Length;
SendWebRequest(http, content);
return(HandleWebResponse(http));
}
catch (Exception ex)
{
Log.Error($"Exception during sending MDN :: {ex.Message}");
throw;
}
}
