Re: [openssl-users] Migration from AES_ctr128_encrypt to EVP

[Vladimir A. Petrov]

Hello Steve,

I was solved. Actually we had a bit old version of the OpenSSL library in
our repository which didn't contain CTR support. Upgrade resolved the
problem. BTW, e.g. this page https://www.openssl.org/docs/manmaster/crypto/
does not have a reference on EVP_aes_128_ctr.

Thanks,
Vladimir.

On Aug 8, 2016 11:08 PM, "Dr. Stephen Henson" <st...@openssl.org> wrote:

> On Mon, Aug 08, 2016, Vladimir A. Petrov wrote:
>
> > Hello,
> >
> > I need to migrate some code from the old style software implemented
> > AES_ctr128_encrypt to the EVP interface. I spent pretty much time reading
> > OpenSSL manual pages and Wiki as well as googling. Unfortunately, I still
> > can't get an idea how to migrate from these AES_* functions to the API
> > provided by EVP. The closest info that I found is the proposal made by Dr
> > Stephen N. Henson (
> > https://mta.openssl.org/pipermail/openssl-users/2015-March/000776.html)
> to
> > switch to EVP_aes_128_ctr, but there is no such 'ctr' mode in EVP for
> AES.
> >
> >
>
> I'm not sure what you mean by "but there is no such 'ctr' mode in EVP for
> AES": can you clarify?
>
> Steve.
> --
> Dr Stephen N. Henson. OpenSSL project core developer.
> Commercial tech support now available see: http://www.openssl.org
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[openssl-users] Migration from AES_ctr128_encrypt to EVP

[Vladimir A. Petrov]

Hello,

I need to migrate some code from the old style software implemented
AES_ctr128_encrypt to the EVP interface. I spent pretty much time reading
OpenSSL manual pages and Wiki as well as googling. Unfortunately, I still
can't get an idea how to migrate from these AES_* functions to the API
provided by EVP. The closest info that I found is the proposal made by Dr
Stephen N. Henson (
https://mta.openssl.org/pipermail/openssl-users/2015-March/000776.html) to
switch to EVP_aes_128_ctr, but there is no such 'ctr' mode in EVP for AES.

Could you please point me on some useful documentation, piece of code or
any other source of information which would provide the guidelines for
accomplishing my task? Or maybe somebody of you already have the experience
in such migration which could be shared.

Thanks in advance,
Vladimir.
-- 
/vap/
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