Yes, I saw this, but the CPAN tests shows that it fails on win32 sysytems. The following code generated this error. asn decode error: decode error at C:/Perl/site/lib/Convert/ASN1/_decode.pm line 60. at C:\scripts\parsder.pl line 3 Can't use string ("1") as a HASH ref while "strict refs" in use at C:/Perl/site/lib/Crypt/X509.pm line 503. 
use Crypt::X509;
$cer = "C:\\temp\\test.cer";
$cert = Crypt::X509->new( cert => $cer );
$subject_email = $cert->subject_email;

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In reply to Re^2: Help extracting public key from X509 .cer file by boat73
in thread Help extracting public key from X509 .cer file by boat73

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