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33 changes: 22 additions & 11 deletions src/XstReader.Api/XstMessage.cs
Original file line number Diff line number Diff line change
Expand Up @@ -642,20 +642,31 @@ private void ReadSignedOrEncryptedMessage(byte[] messageBytes)
}
else
{
string decryptedMessage = Crypto.DecryptWithCert(messageBytes);
string cleartextMessage;

//Message is only signed
if (decryptedMessage.Contains("filename=smime.p7m"))
try
{
cleartextMessage = Crypto.DecodeSigned(decryptedMessage);
string decryptedMessage = Crypto.DecryptWithCert(messageBytes);
string cleartextMessage;

//Message is only signed
if (decryptedMessage.Contains("filename=smime.p7m"))
{
cleartextMessage = Crypto.DecodeSigned(decryptedMessage);
}
// message is only encrypted not signed
else
{
cleartextMessage = decryptedMessage;
}
ParseMimeMessage(cleartextMessage);
}
// message is only encrypted not signed
else
catch (Exception ex)
{
cleartextMessage = decryptedMessage;
}
ParseMimeMessage(cleartextMessage);
if (!Environment.GetCommandLineArgs().Contains("--suppressCryptoErrors"))
{
throw ex;
}
System.Diagnostics.Debug.WriteLine(ex);
};
}

//remove P7M encrypted file from attachments list
Expand Down