cifs: Fix validation of signed data in smb2

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Fixes: c713c8770f ("cifs: push rfc1002 generation down the stack")

We failed to validate signed data returned by the server because
__cifs_calc_signature() now expects to sign the actual data in iov but
we were also passing down the rfc1002 length.

Fix smb3_calc_signature() to calculate signature of rfc1002 length prior
to passing only the actual data iov[1-N] to __cifs_calc_signature(). In
addition, there are a few cases where no rfc1002 length is passed so we
make sure there's one (iov_len == 4).

Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

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Paulo Alcantara 2018-06-23 14:52:24 -03:00 • committed by Steve French

parent 27c32b49c3

commit 8de8c4608f

1 changed files with 24 additions and 4 deletions

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fs/cifs/smb2transport.c

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