Asn1 Tools

Tools to decode/encode ASN.1 DER.

erlang asn1

user guide: https://www.erlang.org/docs/17/apps/asn1/asn1_ug

short version:

example schema(file People.asn):

People DEFINITIONS AUTOMATIC TAGS ::=
BEGIN
  Person ::= SEQUENCE {
    name PrintableString,
    location INTEGER {home(0),field(1),roving(2)},
    age INTEGER OPTIONAL
  }
END

commands:

$ erlc -bder People.asn

$ erl
> John = {'Person', "John", home, 42}.
> {ok,Bin} = 'People':encode('Person', John).
> {ok,JohnDecoded} = 'People':decode('Person', Bin).

dumpasn1

• online version: https://lapo.it/asn1js/
• CLI version: apt install dumpasn1