| /* |
| * cifra - embedded cryptography library |
| * Written in 2014 by Joseph Birr-Pixton <jpixton@gmail.com> |
| * |
| * To the extent possible under law, the author(s) have dedicated all |
| * copyright and related and neighboring rights to this software to the |
| * public domain worldwide. This software is distributed without any |
| * warranty. |
| * |
| * You should have received a copy of the CC0 Public Domain Dedication |
| * along with this software. If not, see |
| * <http://creativecommons.org/publicdomain/zero/1.0/>. |
| */ |
| |
| #ifndef CF_CONFIG_H |
| #define CF_CONFIG_H |
| |
| /** |
| * Library configuration |
| * ===================== |
| */ |
| |
| /* .. c:macro:: CF_SIDE_CHANNEL_PROTECTION |
| * Define this as 1 if you need all available side channel protections. |
| * **This option may alter the ABI**. |
| * |
| * This has a non-trivial performance penalty. Where a |
| * side-channel free option is cheap or free (like checking |
| * a MAC) this is always done in a side-channel free way. |
| * |
| * The default is **on** for all available protections. |
| */ |
| #ifndef CF_SIDE_CHANNEL_PROTECTION |
| # define CF_SIDE_CHANNEL_PROTECTION 1 |
| #endif |
| |
| /* .. c:macro:: CF_TIME_SIDE_CHANNEL_PROTECTION |
| * Define this as 1 if you need timing/branch prediction side channel |
| * protection. |
| * |
| * You probably want this. The default is on. */ |
| #ifndef CF_TIME_SIDE_CHANNEL_PROTECTION |
| # define CF_TIME_SIDE_CHANNEL_PROTECTION CF_SIDE_CHANNEL_PROTECTION |
| #endif |
| |
| /* .. c:macro:: CF_CACHE_SIDE_CHANNEL_PROTECTION |
| * Define this as 1 if you need cache side channel protection. |
| * |
| * If you have a microcontroller with no cache, you can turn this off |
| * without negative effects. |
| * |
| * The default is on. This will have some performance impact, |
| * especially on AES. |
| */ |
| #ifndef CF_CACHE_SIDE_CHANNEL_PROTECTION |
| # define CF_CACHE_SIDE_CHANNEL_PROTECTION CF_SIDE_CHANNEL_PROTECTION |
| #endif |
| |
| #endif |
