integrity: support new struct public_key_signature encoding field

On systems with IMA-appraisal enabled with a policy requiring file
signatures, the "good" signature values are stored on the filesystem as
extended attributes (security.ima).  Signature verification failure
would normally be limited to just a particular file (eg. executable),
but during boot signature verification failure could result in a system
hang.

Defining and requiring a new public_key_signature field requires all
callers of asymmetric signature verification to be updated to reflect
the change.  This patch updates the integrity asymmetric_verify()
caller.

Fixes: 82f94f24475c ("KEYS: Provide software public key query function [ver #2]")
Signed-off-by: Mimi Zohar <[email protected]>
Cc: David Howells <[email protected]>
Acked-by: Denis Kenzior <[email protected]>
Signed-off-by: James Morris <[email protected]>

diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c
index 6dc0751445087727f9d1b09a8c1efdbbc9105625..d775e03fbbcc7d87b9724529a4499b9449a9aa46 100644 (file)
--- a/security/integrity/digsig_asymmetric.c
+++ b/security/integrity/digsig_asymmetric.c
@@ -106,6 +106,7 @@ int asymmetric_verify(struct key *keyring, const char *sig,
 
        pks.pkey_algo = "rsa";
        pks.hash_algo = hash_algo_name[hdr->hash_algo];
+       pks.encoding = "pkcs1";
        pks.digest = (u8 *)data;
        pks.digest_size = datalen;
        pks.s = hdr->sig;