/*
* tries to encrypt a MimeEntity
*/
public static MimeEntity EncryptEntity(MimeEntity entity, IEnumerable <MailboxAddress> list)
{
using (WindowsSecureMimeContext ctx = new WindowsSecureMimeContext(sys.StoreLocation.CurrentUser))
{
return(ApplicationPkcs7Mime.Encrypt(ctx, list, entity));
}
}
/*
* tries to sign a MimeEntity
*/
public static MimeEntity SignEntity(MimeEntity entity, MailboxAddress signer)
{
using (WindowsSecureMimeContext ctx = new WindowsSecureMimeContext(sys.StoreLocation.CurrentUser))
{
return(MultipartSigned.Create(ctx, signer, DigestAlgorithm.Sha1, entity));
}
}
/*
* returns true if email can be encrypted
*/
public static string CanEncrypt(Node emails)
{
if (emails.Count == 0)
{
return("there are no recipients");
}
try
{
List <MailboxAddress> list = new List <MailboxAddress>();
foreach (Node idx in emails)
{
list.Add(new MailboxAddress("", idx.Get <string>()));
}
TextPart entity = new TextPart("text");
using (WindowsSecureMimeContext ctx = new WindowsSecureMimeContext(sys.StoreLocation.CurrentUser))
{
ApplicationPkcs7Mime.Encrypt(ctx, list, entity);
}
return(null);
}
catch (Exception err)
{
return(err.Message);
}
}
/*
* imports the given certificate file into certificate database
*/
public static void ImportCertificate(string certificateFile, string password)
{
Node getBase = new Node();
ActiveEvents.Instance.RaiseActiveEvent(
typeof(CryptographyHelper),
"magix.file.get-base-path",
getBase);
string basePath = getBase["path"].Get <string>();
using (WindowsSecureMimeContext ctx = new WindowsSecureMimeContext(sys.StoreLocation.CurrentUser))
{
using (FileStream stream = File.OpenRead(basePath + certificateFile))
{
if (!string.IsNullOrEmpty(password))
{
ctx.Import(stream, password);
}
else
{
ctx.Import(stream);
}
}
}
}
/*
* tries to sign and encrypt a MimeEntity
*/
public static MimeEntity SignAndEncryptEntity(MimeEntity entity, MailboxAddress signer, IEnumerable <MailboxAddress> list)
{
using (WindowsSecureMimeContext ctx = new WindowsSecureMimeContext(sys.StoreLocation.CurrentUser))
{
return(ApplicationPkcs7Mime.SignAndEncrypt(ctx, signer, DigestAlgorithm.Sha1, list, entity));
}
}
/*
* returns true if email address can sign email
*/
public static bool CanSign(string email)
{
try
{
MailboxAddress signer = new MailboxAddress("", email);
TextPart entity = new TextPart("text");
using (WindowsSecureMimeContext ctx = new WindowsSecureMimeContext(sys.StoreLocation.CurrentUser))
{
MultipartSigned.Create(ctx, signer, DigestAlgorithm.Sha1, entity);
return(true);
}
}
catch
{
return(false);
}
}