Add a salt to the pin and store it in the TPM2 LUKS header for future this. This adds entropy to user supplied pins and helps brute forcing the passphrase on the key residing in the TPM or brute forcing bind key encrypted sessions with low entropy passphrases. Signed-off-by: malikabhi05 <abhishek.malik@intel.com> Signed-off-by: William Roberts <william.c.roberts@intel.com>