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| author |   Mat Martineau <mathew.j.martineau@linux.intel.com> | 2016-08-30 11:33:13 -0700 |
|---|---|---|
| committer | Mat Martineau <mathew.j.martineau@linux.intel.com> | 2017-04-03 10:24:56 -0700 |
| commit | aaf66c883813f0078e3dafe7d20d1461321ac14f (patch) | |
| tree | 5198162cc55309f8653a0a333c2cbdffc64debad /Documentation/security/keys.txt | |
| parent | KEYS: Use a typedef for restrict_link function pointers (diff) | |
| download | linux-dev-aaf66c883813f0078e3dafe7d20d1461321ac14f.tar.xz linux-dev-aaf66c883813f0078e3dafe7d20d1461321ac14f.zip | |
KEYS: Split role of the keyring pointer for keyring restrict functions
The first argument to the restrict_link_func_t functions was a keyring
pointer. These functions are called by the key subsystem with this
argument set to the destination keyring, but restrict_link_by_signature
expects a pointer to the relevant trusted keyring.
Restrict functions may need something other than a single struct key
pointer to allow or reject key linkage, so the data used to make that
decision (such as the trust keyring) is moved to a new, fourth
argument. The first argument is now always the destination keyring.
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Diffstat (limited to 'Documentation/security/keys.txt')
| -rw-r--r-- | Documentation/security/keys.txt | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/security/keys.txt b/Documentation/security/keys.txt index 4502237b12a7..bb575ab80207 100644 --- a/Documentation/security/keys.txt +++ b/Documentation/security/keys.txt @@ -1054,10 +1054,10 @@ payload contents" for more information. can be verified by a key the kernel already has. When called, the restriction function will be passed the keyring being - added to, the key flags value and the type and payload of the key being - added. Note that when a new key is being created, this is called between - payload preparsing and actual key creation. The function should return 0 - to allow the link or an error to reject it. + added to, the key type, the payload of the key being added, and data to be + used in the restriction check. Note that when a new key is being created, + this is called between payload preparsing and actual key creation. The + function should return 0 to allow the link or an error to reject it. A convenience function, restrict_link_reject, exists to always return -EPERM to in this case. |