[U-Boot] [U-Boot,2/4] rsa: Verify RSA padding programatically

[Tom Rini]

On Tue, Nov 08, 2016 at 06:53:40PM +0000, aduda wrote:

> From: Andrew Duda <aduda at meraki.com>
> 
> Padding verification was done against static SHA/RSA pair arrays which
> take up a lot of static memory, are mostly 0xff, and cannot be reused
> for additional SHA/RSA pairings. The padding can be easily computed
> according to PKCS#1v2.1 as:
> 
>   EM = 0x00 || 0x01 || PS || 0x00 || T
> 
> where PS is (emLen - tLen - 3) octets of 0xff and T is DER encoding
> of the hash.
> 
> Store DER prefix in checksum_algo and create rsa_verify_padding
> function to handle verification of a message for any SHA/RSA pairing.
> 
> Signed-off-by: Andrew Duda <aduda at meraki.com>
> Signed-off-by: aduda <aduda at meraki.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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