linux/crypto/asymmetric_keys/pkcs7_key_type.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* Testing module to load key from trusted PKCS#7 message
 *
 * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 */

#define pr_fmt(fmt) …
#include <linux/key.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/verification.h>
#include <linux/key-type.h>
#include <keys/user-type.h>

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;

static unsigned pkcs7_usage;
module_param_named(usage, pkcs7_usage, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(…) …;

/*
 * Retrieve the PKCS#7 message content.
 */
static int pkcs7_view_content(void *ctx, const void *data, size_t len,
			      size_t asn1hdrlen)
{ … }

/*
 * Preparse a PKCS#7 wrapped and validated data blob.
 */
static int pkcs7_preparse(struct key_preparsed_payload *prep)
{ … }

/*
 * user defined keys take an arbitrary string as the description and an
 * arbitrary blob of data as the payload
 */
static struct key_type key_type_pkcs7 = …;

/*
 * Module stuff
 */
static int __init pkcs7_key_init(void)
{ … }

static void __exit pkcs7_key_cleanup(void)
{ … }

module_init(…) …;
module_exit(pkcs7_key_cleanup);