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/*
* Copyright (C) 2016 Pengutronix, Steffen Trumtrar <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __BLOBGEN_H__
#define __BLOBGEN_H__
#include <common.h>
enum access_rights {
KERNEL,
KERNEL_EVM,
USERSPACE,
};
#define KEYMOD_LENGTH 16
#define MAX_BLOB_LEN 4096
#define BLOCKSIZE_BYTES 8
struct blobgen {
struct device_d dev;
int (*encrypt)(struct blobgen *bg, const char *modifier,
const void *plain, int plainsize, void *blob,
int *blobsize);
int (*decrypt)(struct blobgen *bg, const char *modifier,
const void *blob, int blobsize, void **plain,
int *plainsize);
enum access_rights access;
unsigned int max_payload_size;
struct list_head list;
};
int blob_gen_register(struct device_d *dev, struct blobgen *bg);
struct blobgen *blobgen_get(const char *name);
int blob_encrypt(struct blobgen *blg, const char *modifier, const void *plain,
int plainsize, void **blob, int *blobsize);
int blob_encrypt_to_env(struct blobgen *blg, const char *modifier,
const void *plain, int plainsize, const char *varname);
int blob_decrypt(struct blobgen *bg, const char *modifier, const void *blob,
int blobsize, void **plain, int *plainsize);
int blob_decrypt_from_base64(struct blobgen *blg, const char *modifier,
const char *encrypted, void **plain, int *plainsize);
#endif
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