tree 78ec6e98bea72050f2c4ca51d95ec0f0c0c71235
parent 148bb199afcc52cabefaee47b044262dfc232bb4
author Channagoud Kadabi <ckadabi@codeaurora.org> 1441749309 -0700
committer Swetha Chikkaboraiah <schikk@codeaurora.org> 1448871844 +0530

platform: msm_shared: Validate the decrypted signature

For a successful boot image authentication, the RSA decrypt api returns the
size of ASN1 encoded signature (PKCS#1 magic + sha256), compare the size
returned by RSA decrypt API with size of ASN1 if they match the signature is
valid otherwise fail with an error. This check avoids vulnerability due to
trailing data placed at the end of digest.

Change-Id: Ib7077efce6369a253b09a0def8e53d035ee345b8