// SPDX-License-Identifier: GPL-2.0+
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/*
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* Platform keyring for firmware/platform keys
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*
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* Copyright IBM Corporation, 2018
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* Author(s): Nayna Jain <nayna@linux.ibm.com>
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*/
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/cred.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include "../integrity.h"
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/**
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* add_to_platform_keyring - Add to platform keyring without validation.
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* @source: Source of key
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* @data: The blob holding the key
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* @len: The length of the data blob
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*
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* Add a key to the platform keyring without checking its trust chain. This
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* is available only during kernel initialisation.
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*/
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void __init add_to_platform_keyring(const char *source, const void *data,
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size_t len)
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{
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key_perm_t perm;
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int rc;
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perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW;
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rc = integrity_load_cert(INTEGRITY_KEYRING_PLATFORM, source, data, len,
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perm);
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if (rc)
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pr_info("Error adding keys to platform keyring %s\n", source);
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}
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/*
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* Create the trusted keyrings.
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*/
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static __init int platform_keyring_init(void)
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{
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int rc;
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rc = integrity_init_keyring(INTEGRITY_KEYRING_PLATFORM);
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if (rc)
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return rc;
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pr_notice("Platform Keyring initialized\n");
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return 0;
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}
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/*
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* Must be initialised before we try and load the keys into the keyring.
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*/
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device_initcall(platform_keyring_init);
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