#!/usr/bin/perl -w
#
# Build a static ASN.1 Object Identified (OID) registry
#
# Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
# Written by David Howells (dhowells@redhat.com)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public Licence
# as published by the Free Software Foundation; either version
# 2 of the Licence, or (at your option) any later version.
#

use strict;

my @names = ();
my @oids = ();

if ($#ARGV != 1) {
    print STDERR "Format: ", $0, " <in-h-file> <out-c-file>\n";
    exit(2);
}

#
# Open the file to read from
#
open IN_FILE, "<$ARGV[0]" || die;
while (<IN_FILE>) {
    chomp;
    if (m!\s+OID_([a-zA-z][a-zA-Z0-9_]+),\s+/[*]\s+([012][.0-9]*)\s+[*]/!) {
	push @names, $1;
	push @oids, $2;
    }
}
close IN_FILE || die;

#
# Open the files to write into
#
open C_FILE, ">$ARGV[1]" or die;
print C_FILE "/*\n";
print C_FILE " * Automatically generated by ", $0, ".  Do not edit\n";
print C_FILE " */\n";

#
# Split the data up into separate lists and also determine the lengths of the
# encoded data arrays.
#
my @indices = ();
my @lengths = ();
my $total_length = 0;

for (my $i = 0; $i <= $#names; $i++) {
    my $name = $names[$i];
    my $oid = $oids[$i];

    my @components = split(/[.]/, $oid);

    # Determine the encoded length of this OID
    my $size = $#components;
    for (my $loop = 2; $loop <= $#components; $loop++) {
	my $c = $components[$loop];

	# We will base128 encode the number
	my $tmp = ($c == 0) ? 0 : int(log($c)/log(2));
	$tmp = int($tmp / 7);
	$size += $tmp;
    }
    push @lengths, $size;
    push @indices, $total_length;
    $total_length += $size;
}

#
# Emit the look-up-by-OID index table
#
print C_FILE "\n";
if ($total_length <= 255) {
    print C_FILE "static const unsigned char oid_index[OID__NR + 1] = {\n";
} else {
    print C_FILE "static const unsigned short oid_index[OID__NR + 1] = {\n";
}
for (my $i = 0; $i <= $#names; $i++) {
    print C_FILE "\t[OID_", $names[$i], "] = ", $indices[$i], ",\n"
}
print C_FILE "\t[OID__NR] = ", $total_length, "\n";
print C_FILE "};\n";

#
# Encode the OIDs
#
my @encoded_oids = ();

for (my $i = 0; $i <= $#names; $i++) {
    my @octets = ();

    my @components = split(/[.]/, $oids[$i]);

    push @octets, $components[0] * 40 + $components[1];

    for (my $loop = 2; $loop <= $#components; $loop++) {
	my $c = $components[$loop];

	# Base128 encode the number
	my $tmp = ($c == 0) ? 0 : int(log($c)/log(2));
	$tmp = int($tmp / 7);

	for (; $tmp > 0; $tmp--) {
	    push @octets, (($c >> $tmp * 7) & 0x7f) | 0x80;
	}
	push @octets, $c & 0x7f;
    }

    push @encoded_oids, \@octets;
}

#
# Create a hash value for each OID
#
my @hash_values = ();
for (my $i = 0; $i <= $#names; $i++) {
    my @octets = @{$encoded_oids[$i]};

    my $hash = $#octets;
    foreach (@octets) {
	$hash += $_ * 33;
    }

    $hash = ($hash >> 24) ^ ($hash >> 16) ^ ($hash >> 8) ^ ($hash);

    push @hash_values, $hash & 0xff;
}

#
# Emit the OID data
#
print C_FILE "\n";
print C_FILE "static const unsigned char oid_data[", $total_length, "] = {\n";
for (my $i = 0; $i <= $#names; $i++) {
    my @octets = @{$encoded_oids[$i]};
    print C_FILE "\t";
    print C_FILE $_, ", " foreach (@octets);
    print C_FILE "\t// ", $names[$i];
    print C_FILE "\n";
}
print C_FILE "};\n";

#
# Build the search index table (ordered by length then hash then content)
#
my @index_table = ( 0 .. $#names );

@index_table = sort {
    my @octets_a = @{$encoded_oids[$a]};
    my @octets_b = @{$encoded_oids[$b]};

    return $hash_values[$a] <=> $hash_values[$b]
	if ($hash_values[$a] != $hash_values[$b]);
    return $#octets_a <=> $#octets_b
	if ($#octets_a != $#octets_b);
    for (my $i = $#octets_a; $i >= 0; $i--) {
	return $octets_a[$i] <=> $octets_b[$i]
	    if ($octets_a[$i] != $octets_b[$i]);
    }
    return 0;

} @index_table;

#
# Emit the search index and hash value table
#
print C_FILE "\n";
print C_FILE "static const struct {\n";
print C_FILE "\tunsigned char hash;\n";
if ($#names <= 255) {
    print C_FILE "\tenum OID oid : 8;\n";
} else {
    print C_FILE "\tenum OID oid : 16;\n";
}
print C_FILE "} oid_search_table[OID__NR] = {\n";
for (my $i = 0; $i <= $#names; $i++) {
    my @octets = @{$encoded_oids[$index_table[$i]]};
    printf(C_FILE "\t[%3u] = { %3u, OID_%-35s }, // ",
	   $i,
	   $hash_values[$index_table[$i]],
	   $names[$index_table[$i]]);
    printf C_FILE "%02x", $_ foreach (@octets);
    print C_FILE "\n";
}
print C_FILE "};\n";

#
# Emit the OID debugging name table
#
#print C_FILE "\n";
#print C_FILE "const char *const oid_name_table[OID__NR + 1] = {\n";
#
#for (my $i = 0; $i <= $#names; $i++) {
#    print C_FILE "\t\"", $names[$i], "\",\n"
#}
#print C_FILE "\t\"Unknown-OID\"\n";
#print C_FILE "};\n";

#
# Polish off
#
close C_FILE or die;
on></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;</td><td class='right'>2017-01-17 13:46:29 +0000</td></tr>
<tr><th>committer</th><td>Herbert Xu &lt;herbert@gondor.apana.org.au&gt;</td><td class='right'>2017-01-23 22:41:33 +0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/arm/include/asm/barrier.h?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>11e3b725cfc282efe9d4a354153e99d86a16af08</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/arch/arm/include/asm/barrier.h?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>8b5b9e0e1bcae1ab98ee652ffb7b13b05c209bd6</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/arch/arm/include/asm/barrier.h?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>tools/arch/arm/include/asm/barrier.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/arm/include/asm/barrier.h?id=d6040764adcb5cb6de1489422411d701c158bb69'>d6040764adcb5cb6de1489422411d701c158bb69</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/arch/arm/include/asm/barrier.h?id=11e3b725cfc282efe9d4a354153e99d86a16af08&amp;id2=d6040764adcb5cb6de1489422411d701c158bb69'>diff</a>)</td></tr></table>
<div class='commit-subject'>crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes</div><div class='commit-msg'>Update the ARMv8 Crypto Extensions and the plain NEON AES implementations
in CBC and CTR modes to return the next IV back to the skcipher API client.
This is necessary for chaining to work correctly.

Note that for CTR, this is only done if the request is a round multiple of
the block size, since otherwise, chaining is impossible anyway.

Cc: &lt;stable@vger.kernel.org&gt; # v3.16+
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>Diffstat</a> (limited to 'tools/arch/arm/include/asm/barrier.h')</div><table summary='diffstat' class='diffstat'>