Hi,

The mode parameter was added early on to accommodate an old protocol that needed it. I am sorry, but I can’t remember what that protocol was and how it used it.

We have removed it, because it is a dangerous feature, and we didn’t expect it to be needed in any modern applications.

Why do you need to do encryption with a private key? What is your use case?

Best regards,

Janos

(Mbed TLS developer)

From: 克坚 马 via mbed-tls <mbed-tls@lists.trustedfirmware.org>
Date: Monday, 23 October 2023 at 15:58
To: mbed-tls@lists.trustedfirmware.org <mbed-tls@lists.trustedfirmware.org>
Subject: [mbed-tls] How can I encrypt with a private key?

Hi all,
I have been using the old version(2.28) for a very long time, and updated to version 3.4.0 recently.
When using rsa encryption, there is a parameter 'mode' that allows to choose whether to use a public key or a private key. Why is it canceled in the new version? And how can I use the private key to perform an encryption operation?
Thank you for your help!
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