From 008643b86c5f33c115c84ccdda1725cac3ad50ad Mon Sep 17 00:00:00 2001 From: David Howells Date: Fri, 30 Aug 2013 16:07:37 +0100 Subject: KEYS: Add a 'trusted' flag and a 'trusted only' flag Add KEY_FLAG_TRUSTED to indicate that a key either comes from a trusted source or had a cryptographic signature chain that led back to a trusted key the kernel already possessed. Add KEY_FLAGS_TRUSTED_ONLY to indicate that a keyring will only accept links to keys marked with KEY_FLAGS_TRUSTED. Signed-off-by: David Howells Reviewed-by: Kees Cook --- kernel/system_keyring.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'kernel/system_keyring.c') diff --git a/kernel/system_keyring.c b/kernel/system_keyring.c index 51c35141a13a..5296721eca5b 100644 --- a/kernel/system_keyring.c +++ b/kernel/system_keyring.c @@ -40,6 +40,7 @@ static __init int system_trusted_keyring_init(void) if (IS_ERR(system_trusted_keyring)) panic("Can't allocate system trusted keyring\n"); + set_bit(KEY_FLAG_TRUSTED_ONLY, &system_trusted_keyring->flags); return 0; } @@ -82,7 +83,8 @@ static __init int load_system_certificate_list(void) plen, (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW, - KEY_ALLOC_NOT_IN_QUOTA); + KEY_ALLOC_NOT_IN_QUOTA | + KEY_ALLOC_TRUSTED); if (IS_ERR(key)) { pr_err("Problem loading in-kernel X.509 certificate (%ld)\n", PTR_ERR(key)); -- cgit v1.2.3