-

Take input from stdin (some options may not work properly).

-number

Start number bytes into the file.

--

End of arg list.

-a

Print all data in long data blocks, not just the first 128 bytes.

-c file

Read Object Identifier info from alternate config file (values will override equivalents in global config file)

-d

Print dots to show column alignment.

-e

Don't print encapsulated data inside OCTET/BIT STRINGs.

-f file

Dump object at offset -number to file (allows data to be extracted from encapsulating 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.

-l

Long format, display extra info about Object Identifiers.

-o

Don't check validity of character strings hidden in octet strings.

-p

Pure ASN.1 output without encoding information.

-r

Print bits in BIT STRING as encoded in reverse order

-s

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

-t

Display text values next to hex dump of data.

-u

Don't format UTCTime/GeneralizedTime string data.

-x

Display size and offset in hex not decimal.

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