/// <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, object 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, Base64FormattingOptions.InsertLineBreaks) + 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);
}
public static HttpStatusCode SendFile(Uri uri, string filename, byte[] fileData, string from, string to, ProxySettings proxySettings, int timeoutMs, object signingCert, string signingCertPassword, object recipientCert)
{
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 = "Freight Trust";
//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 = recipientCert != null;
bool sign = signingCert != null;
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, signingCert, signingCertPassword, out contentType);
http.Headers.Add("EDIINT-Features", "multiple-attachments");
}
if (encrypt)
{
byte[] signedContentTypeHeader = System.Text.ASCIIEncoding.ASCII.GetBytes("Content-Type: " + contentType + Environment.NewLine);
byte[] contentWithContentTypeHeaderAdded = AS2MIMEUtilities.ConcatBytes(signedContentTypeHeader, content);
content = AS2Encryption.Encrypt(contentWithContentTypeHeaderAdded, recipientCert, 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));
}
