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-rw-r--r--Documentation/keys-request-key.txt22
1 files changed, 12 insertions, 10 deletions
diff --git a/Documentation/keys-request-key.txt b/Documentation/keys-request-key.txt
index 5f2b9c5edbb..22488d79116 100644
--- a/Documentation/keys-request-key.txt
+++ b/Documentation/keys-request-key.txt
@@ -56,10 +56,12 @@ A request proceeds in the following manner:
(4) request_key() then forks and executes /sbin/request-key with a new session
keyring that contains a link to auth key V.
- (5) /sbin/request-key execs an appropriate program to perform the actual
+ (5) /sbin/request-key assumes the authority associated with key U.
+
+ (6) /sbin/request-key execs an appropriate program to perform the actual
instantiation.
- (6) The program may want to access another key from A's context (say a
+ (7) The program may want to access another key from A's context (say a
Kerberos TGT key). It just requests the appropriate key, and the keyring
search notes that the session keyring has auth key V in its bottom level.
@@ -67,19 +69,19 @@ A request proceeds in the following manner:
UID, GID, groups and security info of process A as if it was process A,
and come up with key W.
- (7) The program then does what it must to get the data with which to
+ (8) The program then does what it must to get the data with which to
instantiate key U, using key W as a reference (perhaps it contacts a
Kerberos server using the TGT) and then instantiates key U.
- (8) Upon instantiating key U, auth key V is automatically revoked so that it
+ (9) Upon instantiating key U, auth key V is automatically revoked so that it
may not be used again.
- (9) The program then exits 0 and request_key() deletes key V and returns key
+(10) The program then exits 0 and request_key() deletes key V and returns key
U to the caller.
-This also extends further. If key W (step 5 above) didn't exist, key W would be
-created uninstantiated, another auth key (X) would be created [as per step 3]
-and another copy of /sbin/request-key spawned [as per step 4]; but the context
+This also extends further. If key W (step 7 above) didn't exist, key W would be
+created uninstantiated, another auth key (X) would be created (as per step 3)
+and another copy of /sbin/request-key spawned (as per step 4); but the context
specified by auth key X will still be process A, as it was in auth key V.
This is because process A's keyrings can't simply be attached to
@@ -138,8 +140,8 @@ until one succeeds:
(3) The process's session keyring is searched.
- (4) If the process has a request_key() authorisation key in its session
- keyring then:
+ (4) If the process has assumed the authority associated with a request_key()
+ authorisation key then:
(a) If extant, the calling process's thread keyring is searched.