CMSException: Malformed content

Hi,

I am using bcmail-jdk15-136.jar and bcprov-jdk15-136.jar (within Eclipse WTP-1.5.3 and jdk1.5.0_11)

When I send an email with a file attachment it works fine but when I try to send an encrypted email with file attachment by adding the following statement it does not work :

MimeBodyPart encrypted = gen.generate(baseMsg, SMIMEEnvelopedGenerator.AES128_CBC, "BC");

I do not receive the attached file. The debugger shows that the encrypted object is empty.

The exception "org.bouncycastle.cms.CMSException: Malformed content" occurs at the statement

SMIMEEnveloped enveloped = new SMIMEEnveloped(baseMsg);

Many thanks for helping me.

The source code is below :

.....

MimeBodyPart mbp1 = new MimeBodyPart();

mbp1.setText(mailContent);

MimeBodyPart mbp2 = new MimeBodyPart();

FileDataSource fileAttachment = new FileDataSource(filePath);

DataHandler dh = new DataHandler(fileAttachment);

mbp2.setDataHandler(dh);

mbp2.setFileName(filename);

Multipart multipart = new MimeMultipart();

multipart.addBodyPart(mbp1);

multipart.addBodyPart(mbp2);

SMIMEEnvelopedGenerator gen = new SMIMEEnvelopedGenerator();

gen.addKeyTransRecipient((X509Certificate) cert);

//create the base for message

MimeMessage baseMsg= new MimeMessage(session);

baseMsg.setHeader("Content-Type", "multipart/mixed");

baseMsg.setFrom(new InternetAddress(senderMailAddress));

baseMsg.addRecipients(Message.RecipientType.TO, address);

baseMsg.setSubject("Example Encrypted Message");

baseMsg.setContent(multipart);

baseMsg.saveChanges();

MimeBodyPart encrypted = gen.generate(baseMsg, SMIMEEnvelopedGenerator.AES128_CBC, "BC");

Multipart finalMultipart = new MimeMultipart();

finalMultipart.addBodyPart(encrypted);

//create the message

MimeMessage message = new MimeMessage(session);

message.setSubject(mailSubject);

message.setHeader("Content-Type", "multipart/mixed");

message.setHeader("MIME-Version" , "1.0" );

message.setFrom(new InternetAddress(senderMailAddress));

message.addRecipients(Message.RecipientType.TO, address);

message.setContent(finalMultipart);

message.saveChanges();

trans.sendMessage(message, address);

// look for our recipient identifier

RecipientIdrecId = new RecipientId();

recId.setSerialNumber(cert.getSerialNumber());

recId.setIssuer(cert.getIssuerX500Principal().getEncoded());

SMIMEEnveloped enveloped = new SMIMEEnveloped(baseMsg);

RecipientInformationStorerecipients = enveloped.getRecipientInfos();

RecipientInformationrecipient = recipients.get(recId);

......

[2768 byte] By [kahinaa] at [2007-11-27 5:17:00]