SMIME - decryptSymmetricKey problem.

[Chinh Tran Nam]

Hi All,

My application uses IAIK decryptSymmetricKey to decrypt for encrypted SMIME incoming messages. The mail box is Notes mail database, after the message arrives, the encrypted content is detached to a folder on Hard Drive and we use following code to decrypt the detached file:

(I'm using JavaMail package for Domino 6 - 1.1.x or 1.2.x version, I think. Domino 6 still use JRE 1.3.)

iaik.security.smime.EncryptedContent enContent = new 
// encryptedFile is the PrivateKey for decryption.
iaik.security.smime.EncryptedContent(new FileDataSource(encryptedFile)); 
enContent.decryptSymmetricKey(decryptionKey, 0);
            
Object o = enContent.getContent();

It worked OK with incoming messages with no attachment or small-sized attachments but if the incoming message includes large attachments (e.g. 2-3 Meg Dll files), it threw exceptions:

02/20/2006 09:10:22 AM HTTP JVM: iaik.security.smime.SMimeException: Unable to decrypt symmetric key.

If I remove this line of code: Object o = enContent.getContent(); it works OK and no exception throws.

I've tried to upgrade to to IAIK-CMS with S/MIMEv3 but no luck. It's OK with small-sized eveloped dump, with large-sized, it threw exception:

iaik.smime.SMimeException: Key/content decryption error: Unable to decrypt encrypted content-encryption key: Message could not be decrypted!No RSA
Private Key: iaik.asn1.CodingException: Error in getting component at index=0. Array index out of bounds.
at iaik.smime.SMimeEncrypted.decryptSymmetricKey(Unknown Source)
at iaik.smime.EncryptedContent.decryptSymmetricKey(Unknown Source)

Please help to resolve this issue.
Thanks in advance.
Chinh
[ February 26, 2006: Message edited by: Chinh Tran Nam ]