B<openssl> B<asn1parse>
[B<-help>]
-[B<-inform PEM|DER>]
-[B<-in filename>]
-[B<-out filename>]
+[B<-inform> B<DER>|B<PEM>]
+[B<-in> I<filename>]
+[B<-out> I<filename>]
[B<-noout>]
-[B<-offset number>]
-[B<-length number>]
+[B<-offset> I<number>]
+[B<-length> I<number>]
[B<-i>]
-[B<-oid filename>]
+[B<-oid> I<filename>]
[B<-dump>]
-[B<-dlimit num>]
-[B<-strparse offset>]
-[B<-genstr string>]
-[B<-genconf file>]
+[B<-dlimit> I<num>]
+[B<-strparse> I<offset>]
+[B<-genstr> I<string>]
+[B<-genconf> I<file>]
[B<-strictpem>]
-[B<-item name>]
+[B<-item> I<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.
+This 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
Print out a usage message.
-=item B<-inform> B<DER|PEM>
+=item B<-inform> B<DER>|B<PEM>
The input format. B<DER> is binary format and B<PEM> (the default) is base64
encoded.
-=item B<-in filename>
+=item B<-in> I<filename>
The input file, default is standard input.
-=item B<-out filename>
+=item B<-out> I<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
Don't output the parsed version of the input file.
-=item B<-offset number>
+=item B<-offset> I<number>
Starting offset to begin parsing, default is start of file.
-=item B<-length number>
+=item B<-length> I<number>
Number of bytes to parse, default is until end of file.
Indents the output according to the "depth" of the structures.
-=item B<-oid filename>
+=item B<-oid> I<filename>
A file containing additional OBJECT IDENTIFIERs (OIDs). The format of this
file is described in the NOTES section below.
Dump unknown data in hex format.
-=item B<-dlimit num>
+=item B<-dlimit> I<num>
Like B<-dump>, but only the first B<num> bytes are output.
-=item B<-strparse offset>
+=item B<-strparse> I<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>
+=item B<-genstr> I<string>, B<-genconf> I<file>
-Generate encoded data based on B<string>, B<file> or both using
-L<ASN1_generate_nconf(3)> format. If B<file> only is
+Generate encoded data based on I<string>, I<file> or both using
+L<ASN1_generate_nconf(3)> format. If I<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.
+file using the B<-out> option.
=item B<-strictpem>
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>
+=item B<-item> I<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.
+Attempt to decode and print the data as an B<ASN1_ITEM> I<name>. This can be
+used to print out the fields of any supported ASN.1 structure if the type is
+known.
=back
.....
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
+offset in decimal. C<d=XX> specifies the current depth. The depth is increased
+within the scope of any SET or SEQUENCE. C<hl=XX> gives the header length
+(tag and length octets) of the current type. C<l=XX> gives the length of
the contents octets.
The B<-i> option can be used to make the output more readable.
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:
+be examined using the option C<-strparse 229> to yield:
0:d=0 hl=3 l= 137 cons: SEQUENCE
3:d=1 hl=3 l= 129 prim: INTEGER :E5D21E1F5C8D208EA7A2166C7FAF9F6BDF2059669C60876DDB70840F1A5AAFA59699FE471F379F1DD6A487E7D5409AB6A88D4A9746E24B91D8CF55DB3521015460C8EDE44EE8A4189F7A7BE77D6CD3A9AF2696F486855CF58BF0EDF2B4068058C7A947F52548DDF7E15E96B385F86422BEA9064A3EE9E1158A56E4A6F47E5897
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:
+"long name". Example:
C<1.2.3.4 shortName A long name>
+For any OID with an associated short and long name, this command will display
+the long name.
+
=head1 EXAMPLES
Parse a file:
projects / openssl.git / blobdiff