mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 00:21:59 +00:00
b1aaab22e2
For possibility to use xattr type for new signature formats, pass full xattr to the signature verification function. Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com> Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/*
|
|
* Copyright (C) 2011 Intel Corporation
|
|
*
|
|
* Author:
|
|
* Dmitry Kasatkin <dmitry.kasatkin@intel.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, version 2 of the License.
|
|
*
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/rbtree.h>
|
|
#include <linux/key-type.h>
|
|
#include <linux/digsig.h>
|
|
|
|
#include "integrity.h"
|
|
|
|
static struct key *keyring[INTEGRITY_KEYRING_MAX];
|
|
|
|
static const char *keyring_name[INTEGRITY_KEYRING_MAX] = {
|
|
"_evm",
|
|
"_module",
|
|
"_ima",
|
|
};
|
|
|
|
int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
|
|
const char *digest, int digestlen)
|
|
{
|
|
if (id >= INTEGRITY_KEYRING_MAX)
|
|
return -EINVAL;
|
|
|
|
if (!keyring[id]) {
|
|
keyring[id] =
|
|
request_key(&key_type_keyring, keyring_name[id], NULL);
|
|
if (IS_ERR(keyring[id])) {
|
|
int err = PTR_ERR(keyring[id]);
|
|
pr_err("no %s keyring: %d\n", keyring_name[id], err);
|
|
keyring[id] = NULL;
|
|
return err;
|
|
}
|
|
}
|
|
|
|
switch (sig[1]) {
|
|
case 1:
|
|
/* v1 API expect signature without xattr type */
|
|
return digsig_verify(keyring[id], sig + 1, siglen - 1,
|
|
digest, digestlen);
|
|
case 2:
|
|
return asymmetric_verify(keyring[id], sig, siglen,
|
|
digest, digestlen);
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|