Hi LoraIlieva,

I haven't used this module before, but if you look at the Convert::ASN1 distribution, in the examples you'll find the script x509decode (in fact, part of your code looks like you got it from there). It contains a lot of supporting ASN.1 definitions that I'm assuming you can't do without; my guess is that's what your script is currently missing. However, it looks like the "x509decode" script will only process files in binary format. I took your MIME::Base64 decoding idea, inserted it into that script, tested it, and it looks like it is able to decode an example .pem file. My modified while loop looks like this:

use MIME::Base64 qw/decode_base64/;
while ( my $filename = shift ) {
    my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
        $atime,$mtime,$ctime,$blksize,$blocks) = stat $filename;
    open FILE, "<$filename" or die "no such file";
    binmode FILE;
    my $pem_cert;
    read FILE, $pem_cert, $size;
    close FILE;
    $pem_cert =~ /-----BEGIN CERT\w*-----(.+?)-----END CERT\w*-----/s;
    my $der = decode_base64($1);
    decodeCert( $der );
}

[download]

Hope this helps,
-- Hauke D

Updated wording slightly. Update 2: Replaced the regex to be a little more selective.

In reply to Re: Receive certificate ASN1 structure by haukex
in thread Receive certificate ASN1 structure by LoraIlieva

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