[U-Boot] [PATCH] autoboot.c: Add feature to stop autobooting via SHA256 encrypted password

[Tom Rini]

On Wed, Mar 11, 2015 at 09:51:37AM +0100, Stefan Roese wrote:

> This patch adds the feature to only stop the autobooting, and therefor
> boot into the U-Boot prompt, when the input string / password matches
> a values that is encypted via a SHA256 hash and saved in the environment.
> 
> This feature is enabled by defined these config options:
>      CONFIG_AUTOBOOT_KEYED
>      CONFIG_AUTOBOOT_STOP_STR_SHA256
> 
> Signed-off-by: Stefan Roese <sr at denx.de>

This is certainly interesting but I think brings us back to a point
Simon made a long while back about needing to factor out this code
better.  Especially since this adds big long #if-#else-#endif blocks.
Can we re-do this so at least have some functions be called out instead?
Thanks!

-- 
Tom
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