Indeed! I just found that myself, and am looking into it. That function was only added to Net::SSLeay in January, so I'll need to upgrade. Unfortunately, the usage information for those low-level functions is quiet terse. I'm currently puzzling over this, and how to get a "value corresponding to openssl's X509 structure" 
my $rv = Net::SSLeay::X509_STORE_add_cert($store, $x);
 # $store - value corresponding to openssl's X509_STORE structure
 # $x - value corresponding to openssl's X509 structure

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In reply to Re^2: How to validate signature of a RSA/x509 cert in Perl by Anonymous Monk
in thread How to validate signature of a RSA/x509 cert in Perl by kgoess

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