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Tip revision: a937536b868b8369b98967929045f1df54234323 authored by Linus Torvalds on 17 March 2013, 22:59:32 UTC
Linux 3.9-rc3
Linux 3.9-rc3
Tip revision: a937536
digsig.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[0]) {
case 1:
return digsig_verify(keyring[id], sig, siglen,
digest, digestlen);
case 2:
return asymmetric_verify(keyring[id], sig, siglen,
digest, digestlen);
}
return -EOPNOTSUPP;
}