[openssl-dev] [openssl.org #4323] chacha-armv4.pl bugs

[David Benjamin via RT]

Hi Andy,

The partial-block tail code in chacha-armv4.pl also seems to have problems.
My colleague Steven and I made an attempt to debug it, but we're not
familiar enough with ARM to fix it.

>From playing with it in a debugger, it doesn't look like @t[3] contains the
length. We suspect something is going wrong with the condition flags on
loading or updating length.
https://git.openssl.org/gitweb/?p=openssl.git;a=blob;f=crypto/chacha/asm/chacha-armv4.pl;h=55ebc9e586475a35e313b74483eb4b8d5b6f2b03;hb=HEAD#l585

It may be worth going back and testing these cases on all of the
implementations as well.

David

-- 
Ticket here: http://rt.openssl.org/Ticket/Display.html?id=4323
Please log in as guest with password guest if prompted