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unpack-novatek-firmware.pl
executable file
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/
unpack-novatek-firmware.pl
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#!/usr/bin/perl
#
# unpack-novatek-firmware.pl -- Unpack Reolink/Novatek *.pak firmware files
#
# (C) 2020 Hajo Noerenberg
#
# http://www.noerenberg.de/
# https://github.com/hn/reolink-camera
#
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3.0 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.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/gpl-3.0.txt>.
#
use strict;
my $write = 0;
my @crc32poly = (
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
);
sub crc32calc {
my ( $crc, $string ) = @_;
for ( my $i = 0 ; $i < length($string) ; ++$i ) {
my $byte = ord( substr( $string, $i, 1 ) );
$crc = ( ( ($crc) >> 8 ) ^ $crc32poly[ ( ($crc) ^ $byte ) & 0xff ] );
}
return $crc;
}
if ( $ARGV[0] eq "-w" ) {
$write++;
shift();
}
my $f = $ARGV[0];
die("Usage: $0 [-w] <pak-file>") if ( !$f );
open( IF, "<$f" ) || die( "Unable to open input file '$f': " . $! );
binmode(IF);
my $binheader;
my $binsectiondata;
# For files with 11 sections/partitions:
# Offset Length Description
# 0 1552 File header structure (12 + 704 + 836 bytes)
# 1552 EOF Section binary blobs
# 0 4 Reolink/Baichuan Update File Magic - 0x32725913 "2rY."
# 4 4 CRC32 checksum poly 0x77073096
# 8 4 ??? Board/File Type (0x0224 for IPC51516)
# 12 704 ToC (704 = 11*64 bytes) section name - version - offset - length
# 716 836 ToC (836 = 11*76 bytes) partition name - dst - offset - ? - size
my $numsp = 11;
my $hslen = 12 + $numsp * 64 + $numsp * 76;
read( IF, $binheader, $hslen ) == $hslen || die("Invalid input file - no header");
read( IF, $binsectiondata, ( -s $f ) - $hslen ) > 0 || die("Invalid input file - no section data");
close (IF);
substr( $binheader, 0, 4 ) eq "\x13\x59\x72\x32" || die("Invalid file magic");
my $btype = substr( $binheader, 8, 4 );
my $btypenulled = substr( $binheader, 8, 1 ) . chr(0) . substr( $binheader, 10, 2 );
printf( "Board/File-Type: %s\n", unpack( "H*", $btype ) );
substr( $btype, 1, 1 ) eq "\x24" || die("This script support 0x24-format files only. Remove this check at your own risk");
printf( "Board/File-Type with 0x00\@pos2: %s\n", unpack( "H*", $btypenulled ) );
my $fcrc = substr( $binheader, 4, 4 );
printf( "File CRC: %s\n", unpack( "H*", $fcrc ) );
my $ccrc = crc32calc( 0, $binsectiondata );
$ccrc = crc32calc( $ccrc, $btypenulled );
$ccrc = crc32calc( $ccrc, substr( $binheader, 12, 704 ) );
# partition ToC is not crc-checked, oughhh ...
my $pccrc = pack( "V*", $ccrc );
printf( "Calc CRC: %s\n", unpack( "H*", $pccrc ) );
if ( $fcrc ne $pccrc ) {
print "Warning: File CRC does NOT match computed CRC value!\n";
} else {
print "File CRC and computed CRC match, everything is ok.\n";
}
for ( my $s = 0 ; $s < $numsp ; $s++ ) {
my $offset = 12 + $s * 64;
my $sname = substr( $binheader, $offset + 0, 32 ); $sname =~ s/[^[:print:]]//g;
my $sver = substr( $binheader, $offset + 32, 24 ); $sver =~ s/[^[:print:]]//g;
my $soff = unpack( "V", substr( $binheader, $offset + 56, 4 ) );
my $slen = unpack( "V", substr( $binheader, $offset + 60, 4 ) );
printf("Image File Section %2d name: %s\n", $s, $sname );
printf("Image File Section %2d version: %s\n", $s, $sver );
printf("Image File Section %2d offset: %8d\n", $s, $soff );
printf("Image File Section %2d length: %8d\n", $s, $slen );
if ( $write && $slen > 0 ) {
my $basename = $f;
$basename =~ s{^.*/|\.[^.]+$}{}g;
my $outfile = $basename . "-partition-" . $s . "-" . $sname . ".bin";
$outfile =~ s/\///g;
print "Writing output file '" . $outfile . "'\n";
open( OF, ">$outfile" ) || die( "Unable to open output file '$f': " . $! );
binmode(OF);
print OF substr( $binsectiondata, $soff - $hslen, $slen );
close(OF);
}
print "\n";
}
for ( my $p = 0 ; $p < $numsp ; $p++ ) {
my $offset = 12 + $numsp * 64 + $p * 76;
my $pname = substr( $binheader, $offset + 0, 32 ); $pname =~ s/[^[:print:]]//g;
my $poff = unpack( "l", substr( $binheader, $offset + 32, 4 ));
my $pdst = substr( $binheader, $offset + 36, 32 ); $pdst =~ s/[^[:print:]]//g;
my $punknown = unpack( "l", substr( $binheader, $offset + 68, 4 ));
my $psize = unpack( "l", substr( $binheader, $offset + 72, 4 ));
printf("Partition %2d name: %s\n", $p, $pname );
printf("Partition %2d dst: %s\n", $p, $pdst );
printf("Partition %2d offset: %9d\n", $p, $poff );
printf("Partition %2d unknown: %9d\n", $p, $punknown );
printf("Partition %2d size: %9d\n", $p, $psize );
print "\n";
}