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Re^2: How to use Convert::ASN1 ?

by bh_perl (Monk)
on Jun 25, 2010 at 04:46 UTC ( #846456=note: print w/replies, xml ) Need Help??


in reply to Re: How to use Convert::ASN1 ?
in thread How to use Convert::ASN1 ?

Hi..
This is my program but I have seen that the substr is not subtring the data correctly. Please help me
#!/usr/bin/perl -w use Cwd; use warnings; use strict; use Getopt::Long; use constant FILEHDR => 4; use constant CDRLEN => 286; my ($trace, $help, $infile); my $swap = ''; my $indir = getcwd; my $outdir = getcwd; GetOptions ( "h|help" => \$help, "filename|f=s" => \$infile, "swap|s" => \$swap, "input|i=s" => \$indir, "output|o=s" => \$outdir, "trace|t" => \$trace ) or usage(); sub usage { exit; } my $outfile = $infile; my $data; if ($infile) { #open (OUTPUT, ">$outdir/$outfile"); open (DATA, "$indir/$infile"); binmode DATA; while ($data = <DATA>) { my $tag = unpack "H2", substr $data,0,1,''; my $length = unpack "C", substr $data,0,1,''; if ($length == 0x81) { $length = unpack "C", substr $data,0,1,''; } # Problem is here.. data not substr correctly my $template = 'H' . $length*2; my $rec = unpack $template, substr $data,0,$length,''; printf ("RECORD TAG : %s\n", $tag); printf ("RECORD LENGTH : %s\n", $length); printf ("RECORD : %s\n", $rec); } close(DATA); #close(OUTPUT); }

This is sample file
84 47 00 0c 00 00 11 0a 03 50 35 04 00 64 0a 04 16 12 00 1e 00 1d 00 00 65 09 08 54 52 03 2f 82 05 10 00 02 6e 06 0b a8 53 11 67 00 00 00 7a 7f 00 69 4a 42 47 48 4a 41 0c 00 6a 53 54 4d 44 54 4f 1c 00 66 04 00 00

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