+++ /dev/null
-=pod
-
-=head1 NAME
-
-asn1parse - ASN.1 parsing tool
-
-=head1 SYNOPSIS
-
-B<openssl> B<asn1parse>
-[B<-help>]
-[B<-inform PEM|DER>]
-[B<-in filename>]
-[B<-out filename>]
-[B<-noout>]
-[B<-offset number>]
-[B<-length number>]
-[B<-i>]
-[B<-oid filename>]
-[B<-dump>]
-[B<-dlimit num>]
-[B<-strparse offset>]
-[B<-genstr string>]
-[B<-genconf file>]
-[B<-strictpem>]
-[B<-item name>]
-
-=head1 DESCRIPTION
-
-The B<asn1parse> command is a diagnostic utility that can parse ASN.1
-structures. It can also be used to extract data from ASN.1 formatted data.
-
-=head1 OPTIONS
-
-=over 4
-
-=item B<-help>
-
-Print out a usage message.
-
-=item B<-inform> B<DER|PEM>
-
-the input format. B<DER> is binary format and B<PEM> (the default) is base64
-encoded.
-
-=item B<-in filename>
-
-the input file, default is standard input
-
-=item B<-out filename>
-
-output file to place the DER encoded data into. If this
-option is not present then no data will be output. This is most useful when
-combined with the B<-strparse> option.
-
-=item B<-noout>
-
-don't output the parsed version of the input file.
-
-=item B<-offset number>
-
-starting offset to begin parsing, default is start of file.
-
-=item B<-length number>
-
-number of bytes to parse, default is until end of file.
-
-=item B<-i>
-
-indents the output according to the "depth" of the structures.
-
-=item B<-oid filename>
-
-a file containing additional OBJECT IDENTIFIERs (OIDs). The format of this
-file is described in the NOTES section below.
-
-=item B<-dump>
-
-dump unknown data in hex format.
-
-=item B<-dlimit num>
-
-like B<-dump>, but only the first B<num> bytes are output.
-
-=item B<-strparse offset>
-
-parse the contents octets of the ASN.1 object starting at B<offset>. This
-option can be used multiple times to "drill down" into a nested structure.
-
-=item B<-genstr string>, B<-genconf file>
-
-generate encoded data based on B<string>, B<file> or both using
-L<ASN1_generate_nconf(3)> format. If B<file> only is
-present then the string is obtained from the default section using the name
-B<asn1>. The encoded data is passed through the ASN1 parser and printed out as
-though it came from a file, the contents can thus be examined and written to a
-file using the B<out> option.
-
-=item B<-strictpem>
-
-If this option is used then B<-inform> will be ignored. Without this option any
-data in a PEM format input file will be treated as being base64 encoded and
-processed whether it has the normal PEM BEGIN and END markers or not. This
-option will ignore any data prior to the start of the BEGIN marker, or after an
-END marker in a PEM file.
-
-=item B<-item name>
-
-attempt to decode and print the data as B<ASN1_ITEM name>. This can be used to
-print out the fields of any supported ASN.1 structure if the type is known.
-
-=back
-
-=head2 Output
-
-The output will typically contain lines like this:
-
- 0:d=0 hl=4 l= 681 cons: SEQUENCE
-
-.....
-
- 229:d=3 hl=3 l= 141 prim: BIT STRING
- 373:d=2 hl=3 l= 162 cons: cont [ 3 ]
- 376:d=3 hl=3 l= 159 cons: SEQUENCE
- 379:d=4 hl=2 l= 29 cons: SEQUENCE
- 381:d=5 hl=2 l= 3 prim: OBJECT :X509v3 Subject Key Identifier
- 386:d=5 hl=2 l= 22 prim: OCTET STRING
- 410:d=4 hl=2 l= 112 cons: SEQUENCE
- 412:d=5 hl=2 l= 3 prim: OBJECT :X509v3 Authority Key Identifier
- 417:d=5 hl=2 l= 105 prim: OCTET STRING
- 524:d=4 hl=2 l= 12 cons: SEQUENCE
-
-.....
-
-This example is part of a self-signed certificate. Each line starts with the
-offset in decimal. B<d=XX> specifies the current depth. The depth is increased
-within the scope of any SET or SEQUENCE. B<hl=XX> gives the header length
-(tag and length octets) of the current type. B<l=XX> gives the length of
-the contents octets.
-
-The B<-i> option can be used to make the output more readable.
-
-Some knowledge of the ASN.1 structure is needed to interpret the output.
-
-In this example the BIT STRING at offset 229 is the certificate public key.
-The contents octets of this will contain the public key information. This can
-be examined using the option B<-strparse 229> to yield:
-
- 0:d=0 hl=3 l= 137 cons: SEQUENCE
- 3:d=1 hl=3 l= 129 prim: INTEGER :E5D21E1F5C8D208EA7A2166C7FAF9F6BDF2059669C60876DDB70840F1A5AAFA59699FE471F379F1DD6A487E7D5409AB6A88D4A9746E24B91D8CF55DB3521015460C8EDE44EE8A4189F7A7BE77D6CD3A9AF2696F486855CF58BF0EDF2B4068058C7A947F52548DDF7E15E96B385F86422BEA9064A3EE9E1158A56E4A6F47E5897
- 135:d=1 hl=2 l= 3 prim: INTEGER :010001
-
-=head1 NOTES
-
-If an OID is not part of OpenSSL's internal table it will be represented in
-numerical form (for example 1.2.3.4). The file passed to the B<-oid> option
-allows additional OIDs to be included. Each line consists of three columns,
-the first column is the OID in numerical format and should be followed by white
-space. The second column is the "short name" which is a single word followed
-by white space. The final column is the rest of the line and is the
-"long name". B<asn1parse> displays the long name. Example:
-
-C<1.2.3.4 shortName A long name>
-
-=head1 EXAMPLES
-
-Parse a file:
-
- openssl asn1parse -in file.pem
-
-Parse a DER file:
-
- openssl asn1parse -inform DER -in file.der
-
-Generate a simple UTF8String:
-
- openssl asn1parse -genstr 'UTF8:Hello World'
-
-Generate and write out a UTF8String, don't print parsed output:
-
- openssl asn1parse -genstr 'UTF8:Hello World' -noout -out utf8.der
-
-Generate using a config file:
-
- openssl asn1parse -genconf asn1.cnf -noout -out asn1.der
-
-Example config file:
-
- asn1=SEQUENCE:seq_sect
-
- [seq_sect]
-
- field1=BOOL:TRUE
- field2=EXP:0, UTF8:some random string
-
-
-=head1 BUGS
-
-There should be options to change the format of output lines. The output of some
-ASN.1 types is not well handled (if at all).
-
-=head1 SEE ALSO
-
-L<ASN1_generate_nconf(3)>
-
-=head1 COPYRIGHT
-
-Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
-
-Licensed under the OpenSSL license (the "License"). You may not use
-this file except in compliance with the License. You can obtain a copy
-in the file LICENSE in the source distribution or at
-L<https://www.openssl.org/source/license.html>.
-
-=cut
projects / openssl.git / blobdiff