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KEYS: Add documentation for asymmetric keyring restrictions

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Provide more specific examples of keyring restrictions as applied to
X.509 signature chain verification.

Signed-off-by: Mat Martineau <[email protected]>
Signed-off-by: David Howells <[email protected]>
Signed-off-by: James Morris <[email protected]>
This commit is contained in:
Mat Martineau 2017-07-13 13:17:03 +01:00 • committed by James Morris
commit 7228b66aaf
2 changed files with 63 additions and 8 deletions
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6
Documentation/security/keys/core.rst
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@ -894,6 +894,12 @@ The keyctl syscall functions are:
To apply a keyring restriction the process must have Set Attribute
permission and the keyring must not be previously restricted.
One application of restricted keyrings is to verify X.509 certificate
chains or individual certificate signatures using the asymmetric key type.
See Documentation/crypto/asymmetric-keys.txt for specific restrictions
applicable to the asymmetric key type.
Kernel Services
===============