Hello,
I'm using the openssl command line S/MIME tool. I have a question about
how somethings work.
Problem description:
I'd like to encrypt a message that I have already signed using openssl
clt (command line tool).
I want the encryption to be Public-key. I already know the recipient's
certificate.
I couldn't figure how to do that exactly. I thought this might do it:
"openssl smime -encrypt -in signedFile.msg \
-out encryptedFile.msg \
-des3 recipientCert.pem"
I was figuring that since the certificate had the Public-key, openssl ctl
generates a key for des3. Then it encrypts the message with that des3 key,
and encrypts the des3 key with the Public-key using RSA.
It would seem insecure to do a symmetric key encryption with part of
(or a function of) a public key.
Am I correct in my assumptions?
If not, how can I use the command line tool for encrypting the message
using public-key cryptography (RSA)?
Thank you,
-Osama
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