#!/bin/sh

#

# Generate hash_info.h from kernel headers

#

# Copyright (C) 2018 <vt@altlinux.org>

#

# 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; either version 2, or (at your option)

# any later version.

#

# 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.

KERNEL_HEADERS=$1

HASH_INFO_H=uapi/linux/hash_info.h

HASH_INFO=$KERNEL_HEADERS/include/$HASH_INFO_H

TMPHASHINFO="./tmp_hash_info.h"

gen_hashinfo() {

cat << __EOF__ >$TMPHASHINFO

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */

/*

 * Hash Info: Hash algorithms information

 *

 * Copyright (c) 2013 Dmitry Kasatkin <d.kasatkin@samsung.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; either version 2 of the License, or (at your option)

 * any later version.

 *

 */

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

};

__EOF__

}

# Allow to specify kernel-headers past include/

if [ ! -e $HASH_INFO ]; then

  HASH_INFO2=$KERNEL_HEADERS/$HASH_INFO_H

  if [ -e $HASH_INFO2 ]; then

    HASH_INFO=$HASH_INFO2

  else

    gen_hashinfo

    HASH_INFO="$TMPHASHINFO"

  fi

fi

if [ ! -e $HASH_INFO ]; then

  echo "/* $HASH_INFO is not found */"

  HASH_INFO=/dev/null

else

  echo "/* $HASH_INFO is found */"

fi

echo "enum hash_algo {"

grep HASH_ALGO_.*, $HASH_INFO

printf "\tHASH_ALGO__LAST\n"

echo "};"

echo "const char *const hash_algo_name[HASH_ALGO__LAST] = {"

sed -n 's/HASH_ALGO_\(.*\),/\1 \L\1\E/p' $HASH_INFO | \

  while read a b; do

    # Normalize text hash name: if it contains underscore between

    # digits replace it with a dash, other underscores are removed.

    b=$(echo "$b" | sed "s/\([0-9]\)_\([0-9]\)/\1-\2/g;s/_//g")

    printf '\t%-26s = "%s",\n' "[HASH_ALGO_$a]" "$b"

  done

echo "};"