kernel_lib.h

/*
 * Copyright (C) 1991, 1992 Linus Torvalds
 * Copyright 2007 rPath, Inc. - All Rights Reserved
 * Copyright (c) 2013 Dmitry Kasatkin <d.kasatkin@samsung.com>
 * Copyright (C) 2017 Huawei Technologies Duesseldorf GmbH
 *
 * Author: Roberto Sassu <roberto.sassu@huawei.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.
 *
 * File: kernel_lib.h
 *      Header of kernel_lib.c
 */

#ifndef _KERNEL_LIB_H
#define _KERNEL_LIB_H

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <linux/byteorder/little_endian.h>

/* kernel types */
typedef u_int8_t u8;
typedef u_int16_t u16;
typedef u_int32_t u32;
typedef u_int64_t u64;
typedef int bool;
typedef long loff_t;

enum kernel_read_file_id {READING_DIGEST_LIST_METADATA, READING_DIGEST_LIST};

#define true 1
#define false 0

#define S_IWUGO         (S_IWUSR|S_IWGRP|S_IWOTH)
#define S_IXUGO         (S_IXUSR|S_IXGRP|S_IXOTH)

/* bitmap */
#define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
#define DIV_ROUND_UP __KERNEL_DIV_ROUND_UP
#define BITS_PER_BYTE           8
#define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
#define BITS_PER_LONG 64
#define BIT_WORD(nr)            ((nr) / BITS_PER_LONG)
#define DECLARE_BITMAP(name,bits) \
	unsigned long name[BITS_TO_LONGS(bits)]

#define small_const_nbits(nbits) \
	(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)

#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1)))

static inline bool constant_test_bit(int nr, const void *addr)
{
	const u32 *p = (const u32 *)addr;
	return ((1UL << (nr & 31)) & (p[nr >> 5])) != 0;
}

#define test_bit(nr,addr) constant_test_bit((nr),(addr))

/* errors */
#define ENOENT           2      /* No such file or directory */
#define ENOMEM          12      /* Out of memory */
#define EACCES          13      /* Permission denied */
#define EEXIST          17      /* File exists */
#define EINVAL          22      /* Invalid argument */

#define pr_err printf

/* endianness conversion */
#define be32_to_cpu __be32_to_cpu
#define be16_to_cpu __be16_to_cpu
#define le16_to_cpu __le16_to_cpu
#define le32_to_cpu __le32_to_cpu
#define cpu_to_le16 __cpu_to_le16
#define cpu_to_le32 __cpu_to_le32

/* crypto */
#define CRYPTO_MAX_ALG_NAME             128

#define MD5_DIGEST_SIZE         16
#define SHA1_DIGEST_SIZE        20
#define RMD160_DIGEST_SIZE      20
#define SHA256_DIGEST_SIZE      32
#define SHA384_DIGEST_SIZE      48
#define SHA512_DIGEST_SIZE      64
#define SHA224_DIGEST_SIZE      28
#define RMD128_DIGEST_SIZE      16
#define RMD256_DIGEST_SIZE      32
#define RMD320_DIGEST_SIZE      40
#define WP512_DIGEST_SIZE 64
#define WP384_DIGEST_SIZE 48
#define WP256_DIGEST_SIZE 32
#define TGR192_DIGEST_SIZE 24
#define TGR160_DIGEST_SIZE 20
#define TGR128_DIGEST_SIZE 16
#define SM3256_DIGEST_SIZE 32

enum hash_algo {
	HASH_ALGO_MD4,
	HASH_ALGO_MD5,
	HASH_ALGO_SHA1,
	HASH_ALGO_RIPE_MD_160,
	HASH_ALGO_SHA256,
	HASH_ALGO_SHA384,
	HASH_ALGO_SHA512,
	HASH_ALGO_SHA224,
	HASH_ALGO_RIPE_MD_128,
	HASH_ALGO_RIPE_MD_256,
	HASH_ALGO_RIPE_MD_320,
	HASH_ALGO_WP_256,
	HASH_ALGO_WP_384,
	HASH_ALGO_WP_512,
	HASH_ALGO_TGR_128,
	HASH_ALGO_TGR_160,
	HASH_ALGO_TGR_192,
	HASH_ALGO_SM3_256,
	HASH_ALGO__LAST
};

extern const char *const hash_algo_name[HASH_ALGO__LAST];
extern const int hash_digest_size[HASH_ALGO__LAST];

void bitmap_zero(unsigned long *dst, unsigned int nbits);
void bitmap_set(unsigned long *map, unsigned int start, int len);

int hex2bin(u8 *dst, const char *src, size_t count);

#endif /* _KERNEL_LIB_H */