openssl rsa -in key.pem -des3 -out keyout.pem
This indicates a command to store the RSA private key read from key.pem file
in an encrypted form in keyout.pem. The encryption algorithm used would be
des3. It doesnt mean RSA works in modes like CBC etc.



On Thu, Aug 13, 2009 at 3:49 AM, Sudarshan Soma <sudarshan...@gmail.com>wrote:

> On Thu, Aug 13, 2009 at 2:22 PM, <carlyo...@keycomm.co.uk> wrote:
> >
> >>On Thu 13/08/09 4:46 AM , Sudarshan Soma sudarshan...@gmail.com sent:
> >>Hi
> >>Can anone please clarify this data with OPENSSL 0.9.8i:
> >>
> >>RSA uses key ranges from 768-2048 and can operate only in CBC mode
> >>
> >>DSA uses key length of 1024 and operates only in CBC
> >
> > ? CBC chaining mode only applies to symmetric cipher algorithms such as
> AES and 3DES as far as I know.
> >
> > RSA uses PKCS padding, v1.5, OEAP, PSS, etc.
> >
> > DSA - no idea.
> >
> > Carl
> >
> >
> > ______________________________________________________________________
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> >
>
> Hi I was just confused with option des3 below for rsa where we can
> encrypt publc keys with with des3 CBC modes or something similar to
> that.
> openssl rsa -des3
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