1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * Copyright (C) 2010 IBM Corporation 3 * Copyright (C) 2010 IBM Corporation
4 * Copyright (C) 2010 Politecnico di Torino, I 4 * Copyright (C) 2010 Politecnico di Torino, Italy
5 * TORSEC group -- https:// 5 * TORSEC group -- https://security.polito.it
6 * 6 *
7 * Authors: 7 * Authors:
8 * Mimi Zohar <zohar@us.ibm.com> 8 * Mimi Zohar <zohar@us.ibm.com>
9 * Roberto Sassu <roberto.sassu@polito.it> 9 * Roberto Sassu <roberto.sassu@polito.it>
10 * 10 *
11 * See Documentation/security/keys/trusted-enc 11 * See Documentation/security/keys/trusted-encrypted.rst
12 */ 12 */
13 13
14 #include <linux/uaccess.h> 14 #include <linux/uaccess.h>
15 #include <linux/err.h> 15 #include <linux/err.h>
16 #include <keys/trusted-type.h> 16 #include <keys/trusted-type.h>
17 #include <keys/encrypted-type.h> 17 #include <keys/encrypted-type.h>
18 #include "encrypted.h" 18 #include "encrypted.h"
19 19
20 /* 20 /*
21 * request_trusted_key - request the trusted k 21 * request_trusted_key - request the trusted key
22 * 22 *
23 * Trusted keys are sealed to PCRs and other m 23 * Trusted keys are sealed to PCRs and other metadata. Although userspace
24 * manages both trusted/encrypted key-types, l 24 * manages both trusted/encrypted key-types, like the encrypted key type
25 * data, trusted key type data is not visible 25 * data, trusted key type data is not visible decrypted from userspace.
26 */ 26 */
27 struct key *request_trusted_key(const char *tr 27 struct key *request_trusted_key(const char *trusted_desc,
28 const u8 **mas 28 const u8 **master_key, size_t *master_keylen)
29 { 29 {
30 struct trusted_key_payload *tpayload; 30 struct trusted_key_payload *tpayload;
31 struct key *tkey; 31 struct key *tkey;
32 32
33 tkey = request_key(&key_type_trusted, 33 tkey = request_key(&key_type_trusted, trusted_desc, NULL);
34 if (IS_ERR(tkey)) 34 if (IS_ERR(tkey))
35 goto error; 35 goto error;
36 36
37 down_read(&tkey->sem); 37 down_read(&tkey->sem);
38 tpayload = tkey->payload.data[0]; 38 tpayload = tkey->payload.data[0];
39 *master_key = tpayload->key; 39 *master_key = tpayload->key;
40 *master_keylen = tpayload->key_len; 40 *master_keylen = tpayload->key_len;
41 error: 41 error:
42 return tkey; 42 return tkey;
43 } 43 }
44 44
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.