[openssl-users] Migration from AES_ctr128_encrypt to EVP

Vladimir A. Petrov vaporg at gmail.com
Mon Aug 8 05:41:41 UTC 2016


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,
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