From af103e020b7d8bd0bd4c9fe94cf4067cc2453ca9 Mon Sep 17 00:00:00 2001 From: Petko Manolov Date: Wed, 2 Dec 2015 17:47:55 +0200 Subject: IMA: create machine owner and blacklist keyrings This option creates IMA MOK and blacklist keyrings. IMA MOK is an intermediate keyring that sits between .system and .ima keyrings, effectively forming a simple CA hierarchy. To successfully import a key into .ima_mok it must be signed by a key which CA is in .system keyring. On turn any key that needs to go in .ima keyring must be signed by CA in either .system or .ima_mok keyrings. IMA MOK is empty at kernel boot. IMA blacklist keyring contains all revoked IMA keys. It is consulted before any other keyring. If the search is successful the requested operation is rejected and error is returned to the caller. Signed-off-by: Petko Manolov Signed-off-by: Mimi Zohar --- crypto/asymmetric_keys/x509_public_key.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'crypto') diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c index 2a44b375..9e9e5a6a 100644 --- a/crypto/asymmetric_keys/x509_public_key.c +++ b/crypto/asymmetric_keys/x509_public_key.c @@ -321,6 +321,8 @@ static int x509_key_preparse(struct key_preparsed_payload *prep) goto error_free_cert; } else if (!prep->trusted) { ret = x509_validate_trust(cert, get_system_trusted_keyring()); + if (ret) + ret = x509_validate_trust(cert, get_ima_mok_keyring()); if (!ret) prep->trusted = 1; } -- cgit v1.2.3