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Question:

Default Algorithm used for Mime Encryption

Aug 07 '13 at 09:48

Dear All,

I am evaluating the Chilkat library for an Android Application Development. In this regard, I came across some example for using CkMime for encryption of Emails. Here is the snippet:

CkCert cert = new CkCert();
success = cert.LoadFromFile("myCert.cer");
if (success == false) {
    outStr += cert.lastErrorText() + "\n";
    tv.setText(outStr);
    setContentView(tv);
    return;
}

//  Encrypt the MIME:
success = mime.Encrypt(cert);
if (success == false) {
    outStr += mime.lastErrorText() + "\n";
    tv.setText(outStr);
    setContentView(tv);
    return;
}

Now my question is: what is the default symmetric encryption algorithm used by Encrypt and EncryptN methods?

Thanks.

---

Answer

All Chilkat classes that do PCKS7 encryption have two standard properties:

(string) Pkcs7CryptAlg
(int) Pkcs7KeyLength

Classes having these properties include CkCrypt2, CkMime, and CkEmail. The default values are "RC2" / 128. Your application can set these properties to control the underlying symmetric encrytion algorithm. See the reference documentation here for the list of possible values: http://www.chilkatsoft.com/refdoc/vcCkMimeRef.html