I'm trying to extract the data from a .pem certificate with the Crypt::X509 library, but I get an error in object construction. Here is what I'm doing: 1. Read the .pem file's content:

my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
       $atime,$mtime,$ctime,$blksize,$blocks) = stat $s_filename;
open FILE, "<$s_filename" or die "no such file";
binmode FILE;
my $pem_cert;
read FILE, $pem_cert, $size;
close FILE;

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2. Decode the content from base64 to receive the DER formatted content. This is done because the CPAN documentation of the Crypt::X509 library states that it needs to be passed "A variable containing the DER formatted certificate to be parsed":

my $der = MIME::Base64::decode($pem_cert);

3. Call the Crypt::X509 constructor and check for errors:

my $oref_x509= Crypt::X509->new($der);
if ( $oref_x509->error ) {
          warn "Error on parsing certificate: ",
          $oref_x509->error;
}

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I get the following error: 

Odd number of elements in hash assignment at ..<path>../Crypt/X509.pm 
+line 95.
Use of uninitialized value $end in numeric ge (>=) at ..<path>../Conve
+rt/ASN1/_decode.pm line 626. 
Use of uninitialized value $end in numeric eq (==) at ..<path>../Conve
+rt/ASN1/_decode.pm line 63.  
Error on parsing certificate: decode error at ..<path>../Convert/ASN1/
+_decode.pm line 64.

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In reply to Extract data from certificate with Crypt::X509 by LoraIlieva

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