dumpasn1 - ASN.1 object dump/syntax check program

       quote from Peter Gutmann:

       ASN.1  object  dumping  code,  copyright  Peter  Gutmann <pgut001@cs.auckland.ac.nz>, based on ASN.1 dump
       program by David Kemp <dpkemp@missi.ncsc.mil>, with contributions from various people  including  Matthew
       Hamrick    <hamrick@rsa.com>,   Bruno   Couillard   <bcouillard@chrysalis-its.com>,   Hallvard   Furuseth
       <h.b.furuseth@usit.uio.no>, Geoff Thorpe <geoff@raas.co.nz>, David Boyce <d.boyce@isode.com>, John Hughes
       <john.hughes@entegrity.com>, Life is hard, and then you die <ronald@trustpoint.com>, Hans-Olof Hermansson
       <hans-olof.hermansson@postnet.se>, Tor Rustad <Tor.Rustad@bbs.no>, Kjetil Barvik  <kjetil.barvik@bbs.no>,
       James Sweeny <jsweeny@us.ibm.com>, and several other people whose names I've misplaced.

       dumpasn1 is available at https://www.cs.auckland.ac.nz/~pgut001/

       This manual page was written by Mathieu Malaterre <malat@debian.org> for the Debian GNU/Linux system, but
       may be used by others.

       Copyright Peter Gutmann 1997 - 2016. Last updated 22 October 2019.

dumpasn1 20210212                                 January 2022                                       DUMPASN1(1)

       An  ASN.1  object  dump  program  which will dump data encoded using any of the ASN.1 encoding rules in a
       variety of user-specified formats.

       DumpASN1 - ASN.1 object dump/syntax check program.  Copyright Peter Gutmann 1997 - 2021.  Last updated 12
       February 2021.

              Input options:

              - = Take input from stdin (some options may not work properly) -<number> =  Start  <number>  bytes
              into  the  file  -- = End of arg list -c<file> = Read Object Identifier info from alternate config
              file

              (values will override equivalents in global config file)

              Output options:

       -f<file> = Dump object at offset -<number> to file (allows data to be

              extracted from encapsulating objects)

       -w<number> = Set width of output, default = 80 columns

              Display options:

       -a = Print all data in long data blocks, not just the first 128 bytes

       -d = Print dots to show column alignment

       -g = Display ASN.1 structure outline only (no primitive objects)

       -h = Hex dump object header (tag+length) before the decoded output

       -hh = Same as -h but display more of the object as hex data

       -i = Use shallow indenting, for deeply-nested objects

       -l = Long format, display extra info about Object Identifiers

       -m<number>
              = Maximum nesting level for which to display content

       -p = Pure ASN.1 output without encoding information

       -t = Display text values next to hex dump of data

       -v = Verbose mode, equivalent to -ahlt

              Format options:

       -e = Don't print encapsulated data inside OCTET/BIT STRINGs

       -r = Print bits in BIT STRING as encoded in reverse order

       -u = Don't format UTCTime/GeneralizedTime string data

       -x = Display size and offset in hex not decimal

              Checking options:

       -o = Don't check validity of character strings hidden in octet strings

       -s = Syntax check only, don't dump ASN.1 structures

       -z = Allow zero-length items

       Warnings generated by deprecated OIDs require the use of '-l' to be displayed.  Program  return  code  is
       the number of errors found or EXIT_SUCCESS.

$HOME/.dumpasn1.cfg,/etc/dumpasn1/dumpasn1.cfg:

       This is the configuration file, it will be searched in this order. It contains OIDs commonly used.

       dumpasn1 - ASN.1 object dump/syntax check program

dumpasn1 [-acdefghilmoprstuvwxz] <file>