asn1template

ASN.1 Template is a Perl-based tool designed to convert DER or PEM encoded ASN.1 structures into a human-readable textual format suitable for modifications and subsequent encoding via OpenSSL's ASN1_generate_nconf(3) function. Key features include support for processing multiple concatenated ASN.1 structures and options for simplified labeling and unwrapping of top-level sequences, enabling streamlined ASN.1 structure manipulation without the need for compilation.