On Tue, 3 Feb 2015, Steve Holme wrote:

> Slightly related but do you also know of any free DES implementations?
>
> I would like to add our own DES implementation for when a Crypto engine
> doesn't support it.

libtomcrypt is free and open enough:

https://github.com/libtom/libtomcrypt/blob/master/src/ciphers/des.c

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  / daniel.haxx.se
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