private void Application_ItemSend(object Item, ref bool Cancel)
{
var mailItem = Item as Outlook.MailItem;
if (mailItem == null)
return;
OppRibbon currentRibbon = _ribbon;
if (currentRibbon == null)
return;
var mail = mailItem.Body;
var mailType = mailItem.BodyFormat;
var needToEncrypt = currentRibbon.EncryptButton.Checked;
var needToSign = currentRibbon.SignButton.Checked;
// Early out when we don't need to sign/encrypt
if (!needToEncrypt && !needToSign)
return;
// DEFAULT TO CANCEL
Cancel = true;
try
{
if (mailType != Outlook.OlBodyFormat.olFormatPlain)
{
MessageBox.Show(
Localized.ErrorInvalidFormat,
"Invalid Mail Format",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
Cancel = true; // Prevent sending the mail
return;
}
IList<string> recipients = new List<string>();
if (needToEncrypt)
{
// Popup UI to select the encryption targets
var mailRecipients = (from Outlook.Recipient mailRecipient in mailItem.Recipients
select GetSmtpAddressForRecipient(mailRecipient)).ToList();
var recipientDialog = new FormKeySelection(
mailRecipients,
GetKeysForEncryption,
needToEncrypt,
needToSign);
recipientDialog.TopMost = true;
var recipientResult = recipientDialog.DialogResult;
if(recipientDialog.DialogResult == DialogResult.Ignore)
recipientResult = recipientDialog.ShowDialog();
if (recipientResult != DialogResult.OK)
{
// The user closed the recipient dialog, prevent sending the mail
Cancel = true;
return;
}
needToEncrypt = recipientDialog.Encrypt;
needToSign = recipientDialog.Sign;
foreach (var r in recipientDialog.SelectedKeys)
recipients.Add(r.Key);
if (needToEncrypt && recipients.Count == 0)
{
MessageBox.Show(
Localized.ErrorInvalidRecipientKey,
"Invalid Recipient KeyItem",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
Cancel = true; // Prevent sending the mail
return;
}
if(_settings.Encrypt2Self)
recipients.Add(GetSMTPAddress(mailItem));
}
var attachments = new List<Attachment>();
// Sign and encrypt the plaintext mail
if ((needToSign) && (needToEncrypt))
{
mail = SignAndEncryptEmail(mail, GetSMTPAddress(mailItem), recipients);
if (mail == null)
return;
var mailAttachments = mailItem.Attachments.Cast<Outlook.Attachment>().ToList();
foreach (var attachment in mailAttachments)
{
var a = new Attachment()
{
TempFile = Path.Combine(Path.GetTempPath(), attachment.FileName) + ".pgp",
FileName = attachment.FileName,
DisplayName = attachment.DisplayName,
AttachmentType = attachment.Type,
};
attachment.SaveAsFile(a.TempFile);
attachment.Delete();
// Encrypt file
var cleartext = File.ReadAllBytes(a.TempFile);
var cyphertext = SignAndEncryptAttachment(cleartext, GetSMTPAddress(mailItem), recipients);
File.WriteAllText(a.TempFile, cyphertext);
a.Encrypted = true;
attachments.Add(a);
}
}
else if (needToSign)
{
// Sign the plaintext mail if needed
// 1. Verify text lines are not too long
var mailLines = mail.Split('\n');
var longLines = mailLines.Any(line => line.Length > 70);
var wrapLines = false;
if(longLines)
{
var dialog = new FormSelectLineWrap();
var result = dialog.ShowDialog();
if (result == DialogResult.Cancel)
return;
wrapLines = dialog.radioButtonWrap.Checked;
if (dialog.radioButtonMime.Checked)
{
// todo
}
if (dialog.radioButtonEdit.Checked)
return;
}
mail = SignEmail(mail, GetSMTPAddress(mailItem), wrapLines);
if (mail == null)
return;
}
else if (needToEncrypt)
{
// Encrypt the plaintext mail if needed
mail = EncryptEmail(mail, recipients);
if (mail == null)
return;
var mailAttachments = mailItem.Attachments.Cast<Outlook.Attachment>().ToList();
foreach (var attachment in mailAttachments)
{
var a = new Attachment()
{
TempFile = Path.Combine(Path.GetTempPath(), attachment.FileName)+ ".pgp",
FileName = attachment.FileName,
DisplayName = attachment.DisplayName,
AttachmentType = attachment.Type
};
attachment.SaveAsFile(a.TempFile);
attachment.Delete();
// Encrypt file
var cleartext = File.ReadAllBytes(a.TempFile);
var cyphertext = EncryptEmail(cleartext, recipients);
File.WriteAllText(a.TempFile, cyphertext);
a.Encrypted = true;
attachments.Add(a);
}
}
foreach (var a in attachments)
{
mailItem.Attachments.Add(a.TempFile, a.AttachmentType, 1, a.DisplayName);
}
}
catch (Exception ex)
{
if (ex.Message.ToLower().StartsWith("checksum"))
{
ClearLastPassword();
MessageBox.Show(
Localized.ErrorBadPassphrase,
Localized.ErrorDialogTitle,
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
WriteErrorData("Application_ItemSend", ex);
MessageBox.Show(
ex.Message + "\n"+ex.StackTrace,
Localized.ErrorDialogTitle,
MessageBoxButtons.OK,
MessageBoxIcon.Error);
// Cancel sending
return;
}
if (mail == null)
return;
Cancel = false;
mailItem.Body = mail;
currentRibbon.EncryptButton.Checked = false;
currentRibbon.SignButton.Checked = false;
SetProperty(mailItem, "GnuPGSetting.Sign", false);
SetProperty(mailItem, "GnuPGSetting.Encrypt", false);
}
private void Application_ItemSend(object Item, ref bool Cancel)
{
var mailItem = Item as Outlook.MailItem;
if (mailItem == null)
return;
GnuPGRibbon currentRibbon = ribbon;
if (currentRibbon == null)
return;
string mail = mailItem.Body;
Outlook.OlBodyFormat mailType = mailItem.BodyFormat;
bool needToEncrypt = currentRibbon.EncryptButton.Checked;
bool needToSign = currentRibbon.SignButton.Checked;
// Early out when we don't need to sign/encrypt
if (!needToEncrypt && !needToSign)
return;
// DEFAULT TO CANCEL
Cancel = true;
try
{
if (mailType != Outlook.OlBodyFormat.olFormatPlain)
{
MessageBox.Show(
Localized.ErrorInvalidFormat,
"Invalid Mail Format",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
Cancel = true; // Prevent sending the mail
return;
}
IList<string> recipients = new List<string>();
if (needToEncrypt)
{
// Popup UI to select the encryption targets
List<string> mailRecipients = new List<string>();
foreach (Outlook.Recipient mailRecipient in mailItem.Recipients)
mailRecipients.Add(GetSmtpAddressForRecipient((Outlook.Recipient)mailRecipient));
var recipientDialog = new FormKeySelection(
mailRecipients,
GetKeysForEncryption,
needToEncrypt,
needToSign);
recipientDialog.TopMost = true;
DialogResult recipientResult = recipientDialog.DialogResult;
if(recipientDialog.DialogResult == DialogResult.Ignore)
recipientResult = recipientDialog.ShowDialog();
if (recipientResult != DialogResult.OK)
{
// The user closed the recipient dialog, prevent sending the mail
Cancel = true;
return;
}
needToEncrypt = recipientDialog.Encrypt;
needToSign = recipientDialog.Sign;
foreach (var r in recipientDialog.SelectedKeys)
recipients.Add(r.Key);
if (needToEncrypt && recipients.Count == 0)
{
MessageBox.Show(
Localized.ErrorInvalidRecipientKey,
"Invalid Recipient Key",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
Cancel = true; // Prevent sending the mail
return;
}
recipients.Add(GetSMTPAddress(mailItem));
}
var attachments = new List<Attachment>();
// Sign and encrypt the plaintext mail
if ((needToSign) && (needToEncrypt))
{
mail = SignAndEncryptEmail(mail, GetSMTPAddress(mailItem), recipients);
if (mail == null)
return;
var mailAttachments = new List<Outlook.Attachment>();
foreach (Outlook.Attachment attachment in mailItem.Attachments)
mailAttachments.Add(attachment);
foreach (var attachment in mailAttachments)
{
var a = new Attachment();
a.TempFile = Path.GetTempPath();
a.FileName = attachment.FileName;
a.DisplayName = attachment.DisplayName;
a.AttachmentType = attachment.Type;
a.TempFile = Path.Combine(a.TempFile, a.FileName);
a.TempFile = a.TempFile + ".pgp";
attachment.SaveAsFile(a.TempFile);
attachment.Delete();
// Encrypt file
byte[] cleartext = File.ReadAllBytes(a.TempFile);
string cyphertext = SignAndEncryptAttachment(cleartext, GetSMTPAddress(mailItem), recipients);
File.WriteAllText(a.TempFile, cyphertext);
a.Encrypted = true;
attachments.Add(a);
}
}
else if (needToSign)
{
// Sign the plaintext mail if needed
// 1. Verify text lines are not too long
var mailLines = mail.Split('\n');
var longLines = mailLines.Any(line => line.Length > 70);
if(longLines)
{
var dialog = new FormSelectLineWrap();
var result = dialog.ShowDialog();
if (result == DialogResult.Cancel)
return;
if (dialog.radioButtonWrap.Checked)
{
var lines = new List<string>(mailLines);
for(int i = 0; i<lines.Count; i++)
{
var line = lines[i];
if(line.Length>70)
{
var newLine = line.Substring(70);
line = line.Substring(0, 70);
lines[i] = line;
lines.Insert(i + 1, newLine);
}
}
var sb = new StringBuilder(mail.Length+20);
foreach (var line in lines)
sb.AppendLine(line.TrimEnd('\r','\n'));
mail = sb.ToString();
}
if (dialog.radioButtonMime.Checked)
{
// todo
}
if (dialog.radioButtonEdit.Checked)
return;
}
mail = SignEmail(mail, GetSMTPAddress(mailItem));
if (mail == null)
return;
}
else if (needToEncrypt)
{
// Encrypt the plaintext mail if needed
mail = EncryptEmail(mail, recipients);
if (mail == null)
return;
var mailAttachments = new List<Outlook.Attachment>();
foreach (Outlook.Attachment attachment in mailItem.Attachments)
mailAttachments.Add(attachment);
foreach (var attachment in mailAttachments)
{
var a = new Attachment();
a.TempFile = Path.GetTempPath();
a.FileName = attachment.FileName;
a.DisplayName = attachment.DisplayName;
a.AttachmentType = attachment.Type;
a.TempFile = Path.Combine(a.TempFile, a.FileName);
a.TempFile = a.TempFile + ".pgp";
attachment.SaveAsFile(a.TempFile);
attachment.Delete();
// Encrypt file
byte[] cleartext = File.ReadAllBytes(a.TempFile);
string cyphertext = EncryptEmail(cleartext, recipients);
File.WriteAllText(a.TempFile, cyphertext);
a.Encrypted = true;
attachments.Add(a);
}
}
foreach (var a in attachments)
{
mailItem.Attachments.Add(a.TempFile, a.AttachmentType, 1, a.DisplayName);
}
}
catch (Exception ex)
{
if (ex.Message.ToLower().StartsWith("checksum"))
{
MessageBox.Show(
Localized.ErrorBadPassphrase,
"Outlook Privacy Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
WriteErrorData("Application_ItemSend", ex);
MessageBox.Show(
ex.Message,
"Outlook Privacy Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
// Cancel sending
return;
}
if (mail == null)
return;
Cancel = false;
mailItem.Body = mail;
currentRibbon.EncryptButton.Checked = false;
currentRibbon.SignButton.Checked = false;
SetProperty(mailItem, "GnuPGSetting.Sign", false);
SetProperty(mailItem, "GnuPGSetting.Encrypt", false);
}
