show dumps only if not using --write

[perl-Mifare-MAD.git] / nfc-card-dumper.pl

diff --git a/nfc-card-dumper.pl b/nfc-card-dumper.pl
index ffdecc9..5397f06 100755 (executable)
--- a/nfc-card-dumper.pl
+++ b/nfc-card-dumper.pl
@@ -6,9 +6,18 @@ use RFID::Libnfc::Reader;
 use RFID::Libnfc::Constants;
 use File::Slurp;
 use Digest::MD5 qw(md5_hex);
+use Getopt::Long::Descriptive;
 
 use Data::Dump qw(dump);
 
+my ($opt,$usage) = describe_options(
+       '%c %c [dump_with_keys]',
+       [ 'write=s',    'write dump to card' ],
+       [ 'debug|d',    'show debug dumps' ],
+       [ 'help|h',             'usage' ],
+);
+print $usage->text, exit if $opt->help;
+
 my $debug = $ENV{DEBUG} || 0;
 my $keyfile = shift @ARGV;
 
@@ -39,7 +48,7 @@ if ($r->init()) {
 
        my $card;
 
-       print STDERR "$uid reading blocks ";
+       print STDERR "reading $uid blocks ";
     for (my $i = 0; $i < $tag->blocks; $i++) {
         if (my $data = $tag->read_block($i)) {
             # if we are dumping an ultralight token, 
@@ -87,7 +96,7 @@ if ($r->init()) {
        }
 
        my $md5 = md5_hex($card);
-       my $out_file = "cards/$uid.$md5";
+       my $out_file = "cards/$uid.$md5.mfd";
        if ( -e $out_file ) {
                warn "$out_file allready exists, not overwriting\n";
        } else {
@@ -100,8 +109,21 @@ if ($r->init()) {
                }
        }
 
-       # view dump
-       system "./mifare-mad.pl $out_file > $out_file.txt";
-       $ENV{MAD} && system "vi $out_file.txt";
+       if ( $opt->write ) {
+               my $card = read_file $opt->write;
+               print STDERR "writing $uid block ";
+               foreach my $block ( 0 .. $tag->blocks ) {
+                       my $offset = 0x10 * $block;
+                       $tag->write_block( $block, substr($card,$offset,0x10) );
+                       print STDERR "$block ";
+               }
+               print STDERR "done\n";
+       } else {
+               # view dump
+               my $txt_file = $out_file;
+               $txt_file =~ s/\.mfd/.txt/ || die "can't change extension to txt";
+               system "./mifare-mad.pl $out_file > $txt_file";
+               $ENV{MAD} && system "vi $txt_file";
+       }
 }