NAME
dumpasn1 - ASN.1 object dump/syntax check program
SYNOPSIS
dumpasn1 [-acdefghilmoprstuvwxz] <file>
DESCRIPTION
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.
COMMENT
This manual page was written by Mathieu Malaterre <malat [AT] debian.org> for the Debian GNU/Linux system, but may be used by others.
FILES
$HOME/.dumpasn1.cfg, /etc/dumpasn1/dumpasn1.cfg:
This is the configuration file, it will be searched in this order. It contains OIDs commonly used.
AUTHOR
quote from Peter Gutmann:
ASN.1 object dumping code, copyright Peter Gutmann <pgut001 [AT] cs.nz>, based on ASN.1 dump program by David Kemp <dpkemp [AT] missi.mil>, with contributions from various people including Matthew Hamrick <hamrick [AT] rsa.com>, Bruno Couillard <bcouillard [AT] chrysalis-its.com>, Hallvard Furuseth <h.b.furuseth [AT] usit.no>, Geoff Thorpe <geoff [AT] raas.nz>, David Boyce <d.boyce [AT] isode.com>, John Hughes <john.hughes [AT] entegrity.com>, Life is hard, and then you die <ronald [AT] trustpoint.com>, Hans-Olof Hermansson <hans-olof.hermansson [AT] postnet.se>, Tor Rustad <Tor.Rustad [AT] bbs.no>, Kjetil Barvik <kjetil.barvik [AT] bbs.no>, James Sweeny <jsweeny [AT] us.com>, and several other people whose names I’ve misplaced.
dumpasn1 is available at https://www.cs.auckland.ac.nz/~pgut001/
COPYRIGHT
Copyright Peter Gutmann 1997 - 2016. Last updated 22 October 2019.