fq/format/asn1/asn1_ber.md

Can also decode CER and BER but with no extra validation. Currently does not support specifying a schema.

Supports torepr but without schema support it's not that useful:

fq -d asn1_ber torepr file.ber

There is also frompem and topem to help working with PEM format:

fq -d raw 'frompem | asn1_ber | d' cert.pem

If the schema is known and not that complicated it can be reproduced:

fq -d asn1_ber 'torepr as $r | ["version", "modulus", "private_exponent", "private_exponen", "prime1", "prime2", "exponent1", "exponent2", "coefficient"] | with_entries({key: .value, value: $r[.key]})' pkcs1.der