certs: Add a secondary system keyring that can be added to dynamically

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Add a secondary system keyring that can be added to by root whilst the
system is running - provided the key being added is vouched for by a key
built into the kernel or already added to the secondary keyring.

Rename .system_keyring to .builtin_trusted_keys to distinguish it more
obviously from the new keyring (called .secondary_trusted_keys).

The new keyring needs to be enabled with CONFIG_SECONDARY_TRUSTED_KEYRING.

If the secondary keyring is enabled, a link is created from that to
.builtin_trusted_keys so that the the latter will automatically be searched
too if the secondary keyring is searched.

Signed-off-by: David Howells <dhowells@redhat.com>

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This commit is contained in:

David Howells 2016-04-06 16:14:27 +01:00

parent 77f68bac94

commit d3bfe84129

3 changed files with 88 additions and 16 deletions

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include/keys/system_keyring.h

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