From bc01637a80f5b670bd70a0279d3f93fa8de1c96d Mon Sep 17 00:00:00 2001
From: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Date: Wed, 12 Sep 2012 13:26:55 +0300
Subject: [PATCH] digsig: add hash size comparision on signature verification

When pkcs_1_v1_5_decode_emsa() returns without error and hash sizes do
not match, hash comparision is not done and digsig_verify_rsa() returns
no error.  This is a bug and this patch fixes it.

The bug was introduced in v3.3 by commit b35e286a640f ("lib/digsig:
pkcs_1_v1_5_decode_emsa cleanup").

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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