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.br keyctl (1)
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command's
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.b instantiate
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operation.
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the arguments supplied to the
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.b instantiate
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operation are:
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the id of the uninstantiated key
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.ri ( %k );
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the callout data supplied to the
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.br request_key ()
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call
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.ri ( %c );
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and the session keyring
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.ri ( %s )
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of the requestor (i.e., the caller of
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.br request_key ()).
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see
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.br request\-key.conf (5)
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for details of these
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.i %
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specifiers.
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.pp
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then we run the program and check the contents of
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.ir /proc/keys
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to verify that the requested key has been instantiated:
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.pp
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.in +4n
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.ex
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$ \fb./t_request_key user mtk:key1 "payload data"\fp
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$ \fbgrep \(aq2dddaf50\(aq /proc/keys\fp
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2dddaf50 i\-\-q\-\-\- 1 perm 3f010000 1000 1000 user mtk:key1: 12
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.ee
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.in
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.pp
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for another example of the use of this program, see
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.br keyctl (2).
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.ss program source
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\&
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.ex
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/* t_request_key.c */
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#include <sys/types.h>
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#include <keyutils.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int
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main(int argc, char *argv[])
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{
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key_serial_t key;
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if (argc != 4) {
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fprintf(stderr, "usage: %s type description callout\-data\en",
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argv[0]);
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exit(exit_failure);
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}
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key = request_key(argv[1], argv[2], argv[3],
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key_spec_session_keyring);
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if (key == \-1) {
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perror("request_key");
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exit(exit_failure);
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}
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printf("key id is %jx\en", (uintmax_t) key);
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exit(exit_success);
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}
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.ee
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.sh see also
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.ad l
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.nh
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.br keyctl (1),
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.br add_key (2),
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.br keyctl (2),
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.br keyctl (3),
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.br capabilities (7),
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.br keyrings (7),
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.br keyutils (7),
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.br persistent\-keyring (7),
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.br process\-keyring (7),
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.br session\-keyring (7),
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.br thread\-keyring (7),
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.br user\-keyring (7),
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.br user\-session\-keyring (7),
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.br request\-key (8)
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.pp
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the kernel source files
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.ir documentation/security/keys/core.rst
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and
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.ir documentation/keys/request\-key.rst
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(or, before linux 4.13, in the files
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.\" commit b68101a1e8f0263dbc7b8375d2a7c57c6216fb76
|
.ir documentation/security/keys.txt
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and
|
.\" commit 3db38ed76890565772fcca3279cc8d454ea6176b
|
.ir documentation/security/keys\-request\-key.txt ).
|
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