Gecko [ sachasauda.akalacademy.ac.in ]

Name	Size	Permission
CA.pl.1	12.08 KB	-rw-r--r--
asn1parse.1	10.95 KB	-rw-r--r--
c_rehash.1	8.57 KB	-rw-r--r--
ca.1	32.7 KB	-rw-r--r--
ciphers.1	37.32 KB	-rw-r--r--
cms.1	31.95 KB	-rw-r--r--
crl.1	7.5 KB	-rw-r--r--
crl2pkcs7.1	7.27 KB	-rw-r--r--
dgst.1	11.63 KB	-rw-r--r--
dhparam.1	9.1 KB	-rw-r--r--
dsa.1	9.78 KB	-rw-r--r--
dsaparam.1	7.82 KB	-rw-r--r--
ec.1	10.64 KB	-rw-r--r--
ecparam.1	9.96 KB	-rw-r--r--
enc.1	19.46 KB	-rw-r--r--
engine.1	7.18 KB	-rw-r--r--
errstr.1	4.97 KB	-rw-r--r--
gendsa.1	6.96 KB	-rw-r--r--
genpkey.1	15.69 KB	-rw-r--r--
genrsa.1	8.06 KB	-rw-r--r--
list.1	6.35 KB	-rw-r--r--
nseq.1	6.25 KB	-rw-r--r--
ocsp.1	23.59 KB	-rw-r--r--
openssl-asn1parse.1	10.95 KB	-rw-r--r--
openssl-c_rehash.1	8.57 KB	-rw-r--r--
openssl-ca.1	32.7 KB	-rw-r--r--
openssl-ciphers.1	37.32 KB	-rw-r--r--
openssl-cms.1	31.95 KB	-rw-r--r--
openssl-crl.1	7.5 KB	-rw-r--r--
openssl-crl2pkcs7.1	7.27 KB	-rw-r--r--
openssl-dgst.1	11.63 KB	-rw-r--r--
openssl-dhparam.1	9.1 KB	-rw-r--r--
openssl-dsa.1	9.78 KB	-rw-r--r--
openssl-dsaparam.1	7.82 KB	-rw-r--r--
openssl-ec.1	10.64 KB	-rw-r--r--
openssl-ecparam.1	9.96 KB	-rw-r--r--
openssl-enc.1	19.46 KB	-rw-r--r--
openssl-engine.1	7.18 KB	-rw-r--r--
openssl-errstr.1	4.97 KB	-rw-r--r--
openssl-gendsa.1	6.96 KB	-rw-r--r--
openssl-genpkey.1	15.69 KB	-rw-r--r--
openssl-genrsa.1	8.06 KB	-rw-r--r--
openssl-list.1	6.35 KB	-rw-r--r--
openssl-nseq.1	6.25 KB	-rw-r--r--
openssl-ocsp.1	23.59 KB	-rw-r--r--
openssl-passwd.1	7.18 KB	-rw-r--r--
openssl-pkcs12.1	17.9 KB	-rw-r--r--
openssl-pkcs7.1	7.11 KB	-rw-r--r--
openssl-pkcs8.1	15.66 KB	-rw-r--r--
openssl-pkey.1	8.81 KB	-rw-r--r--
openssl-pkeyparam.1	6.18 KB	-rw-r--r--
openssl-pkeyutl.1	15.88 KB	-rw-r--r--
openssl-prime.1	5.38 KB	-rw-r--r--
openssl-rand.1	6.68 KB	-rw-r--r--
openssl-rehash.1	8.57 KB	-rw-r--r--
openssl-req.1	29.78 KB	-rw-r--r--
openssl-rsa.1	10.42 KB	-rw-r--r--
openssl-rsautl.1	10.7 KB	-rw-r--r--
openssl-s_client.1	36.29 KB	-rw-r--r--
openssl-s_server.1	34.3 KB	-rw-r--r--
openssl-s_time.1	12.1 KB	-rw-r--r--
openssl-sess_id.1	8.86 KB	-rw-r--r--
openssl-smime.1	23.06 KB	-rw-r--r--
openssl-speed.1	7.02 KB	-rw-r--r--
openssl-spkac.1	8.53 KB	-rw-r--r--
openssl-srp.1	5.8 KB	-rw-r--r--
openssl-storeutl.1	7.48 KB	-rw-r--r--
openssl-ts.1	28.03 KB	-rw-r--r--
openssl-tsget.1	11.17 KB	-rw-r--r--
openssl-verify.1	33.23 KB	-rw-r--r--
openssl-version.1	5.36 KB	-rw-r--r--
openssl-x509.1	37.6 KB	-rw-r--r--
openssl.1	21.09 KB	-rw-r--r--
passwd.1	7.18 KB	-rw-r--r--
pkcs12.1	17.9 KB	-rw-r--r--
pkcs7.1	7.11 KB	-rw-r--r--
pkcs8.1	15.66 KB	-rw-r--r--
pkey.1	8.81 KB	-rw-r--r--
pkeyparam.1	6.18 KB	-rw-r--r--
pkeyutl.1	15.88 KB	-rw-r--r--
prime.1	5.38 KB	-rw-r--r--
rand.1	6.68 KB	-rw-r--r--
rehash.1	8.57 KB	-rw-r--r--
req.1	29.78 KB	-rw-r--r--
rsa.1	10.42 KB	-rw-r--r--
rsautl.1	10.7 KB	-rw-r--r--
s_client.1	36.29 KB	-rw-r--r--
s_server.1	34.3 KB	-rw-r--r--
s_time.1	12.1 KB	-rw-r--r--
sess_id.1	8.86 KB	-rw-r--r--
smime.1	23.06 KB	-rw-r--r--
speed.1	7.02 KB	-rw-r--r--
spkac.1	8.53 KB	-rw-r--r--
srp.1	5.8 KB	-rw-r--r--
storeutl.1	7.48 KB	-rw-r--r--
ts.1	28.03 KB	-rw-r--r--
tsget.1	11.17 KB	-rw-r--r--
verify.1	33.23 KB	-rw-r--r--
version.1	5.36 KB	-rw-r--r--
x509.1	37.6 KB	-rw-r--r--

Code Editor : asn1parse.1

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.\" ========================================================================
.\"
.IX Title "ASN1PARSE 1"
.TH ASN1PARSE 1 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
openssl\-asn1parse, asn1parse \- ASN.1 parsing tool
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBopenssl\fR \fBasn1parse\fR
[\fB\-help\fR]
[\fB\-inform PEM|DER\fR]
[\fB\-in filename\fR]
[\fB\-out filename\fR]
[\fB\-noout\fR]
[\fB\-offset number\fR]
[\fB\-length number\fR]
[\fB\-i\fR]
[\fB\-oid filename\fR]
[\fB\-dump\fR]
[\fB\-dlimit num\fR]
[\fB\-strparse offset\fR]
[\fB\-genstr string\fR]
[\fB\-genconf file\fR]
[\fB\-strictpem\fR]
[\fB\-item name\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBasn1parse\fR command is a diagnostic utility that can parse \s-1ASN.1\s0
structures. It can also be used to extract data from \s-1ASN.1\s0 formatted data.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-help\fR" 4
.IX Item "-help"
Print out a usage message.
.IP "\fB\-inform\fR \fBDER|PEM\fR" 4
.IX Item "-inform DER|PEM"
The input format. \fB\s-1DER\s0\fR is binary format and \fB\s-1PEM\s0\fR (the default) is base64
encoded.
.IP "\fB\-in filename\fR" 4
.IX Item "-in filename"
The input file, default is standard input.
.IP "\fB\-out filename\fR" 4
.IX Item "-out filename"
Output file to place the \s-1DER\s0 encoded data into. If this
option is not present then no data will be output. This is most useful when
combined with the \fB\-strparse\fR option.
.IP "\fB\-noout\fR" 4
.IX Item "-noout"
Don't output the parsed version of the input file.
.IP "\fB\-offset number\fR" 4
.IX Item "-offset number"
Starting offset to begin parsing, default is start of file.
.IP "\fB\-length number\fR" 4
.IX Item "-length number"
Number of bytes to parse, default is until end of file.
.IP "\fB\-i\fR" 4
.IX Item "-i"
Indents the output according to the \*(L"depth\*(R" of the structures.
.IP "\fB\-oid filename\fR" 4
.IX Item "-oid filename"
A file containing additional \s-1OBJECT\s0 IDENTIFIERs (OIDs). The format of this
file is described in the \s-1NOTES\s0 section below.
.IP "\fB\-dump\fR" 4
.IX Item "-dump"
Dump unknown data in hex format.
.IP "\fB\-dlimit num\fR" 4
.IX Item "-dlimit num"
Like \fB\-dump\fR, but only the first \fBnum\fR bytes are output.
.IP "\fB\-strparse offset\fR" 4
.IX Item "-strparse offset"
Parse the contents octets of the \s-1ASN.1\s0 object starting at \fBoffset\fR. This
option can be used multiple times to \*(L"drill down\*(R" into a nested structure.
.IP "\fB\-genstr string\fR, \fB\-genconf file\fR" 4
.IX Item "-genstr string, -genconf file"
Generate encoded data based on \fBstring\fR, \fBfile\fR or both using
\&\fIASN1_generate_nconf\fR\|(3) format. If \fBfile\fR only is
present then the string is obtained from the default section using the name
\&\fBasn1\fR. The encoded data is passed through the \s-1ASN1\s0 parser and printed out as
though it came from a file, the contents can thus be examined and written to a
file using the \fBout\fR option.
.IP "\fB\-strictpem\fR" 4
.IX Item "-strictpem"
If this option is used then \fB\-inform\fR will be ignored. Without this option any
data in a \s-1PEM\s0 format input file will be treated as being base64 encoded and
processed whether it has the normal \s-1PEM BEGIN\s0 and \s-1END\s0 markers or not. This
option will ignore any data prior to the start of the \s-1BEGIN\s0 marker, or after an
\&\s-1END\s0 marker in a \s-1PEM\s0 file.
.IP "\fB\-item name\fR" 4
.IX Item "-item name"
Attempt to decode and print the data as \fB\s-1ASN1_ITEM\s0 name\fR. This can be used to
print out the fields of any supported \s-1ASN.1\s0 structure if the type is known.
.SS "Output"
.IX Subsection "Output"
The output will typically contain lines like this:
.PP
.Vb 1
\&  0:d=0  hl=4 l= 681 cons: SEQUENCE
.Ve
.PP
\&.....
.PP
.Vb 10
\&  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
.Ve
.PP
\&.....
.PP
This example is part of a self-signed certificate. Each line starts with the
offset in decimal. \fBd=XX\fR specifies the current depth. The depth is increased
within the scope of any \s-1SET\s0 or \s-1SEQUENCE. \s0\fBhl=XX\fR gives the header length
(tag and length octets) of the current type. \fBl=XX\fR gives the length of
the contents octets.
.PP
The \fB\-i\fR option can be used to make the output more readable.
.PP
Some knowledge of the \s-1ASN.1\s0 structure is needed to interpret the output.
.PP
In this example the \s-1BIT STRING\s0 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 \fB\-strparse 229\fR to yield:
.PP
.Vb 3
\&    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
.Ve
.SH "NOTES"
.IX Header "NOTES"
If an \s-1OID\s0 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 \fB\-oid\fR option
allows additional OIDs to be included. Each line consists of three columns,
the first column is the \s-1OID\s0 in numerical format and should be followed by white
space. The second column is the \*(L"short name\*(R" which is a single word followed
by white space. The final column is the rest of the line and is the
\&\*(L"long name\*(R". \fBasn1parse\fR displays the long name. Example:
.PP
\&\f(CW\*(C`1.2.3.4       shortName       A long name\*(C'\fR
.SH "EXAMPLES"
.IX Header "EXAMPLES"
Parse a file:
.PP
.Vb 1
\& openssl asn1parse \-in file.pem
.Ve
.PP
Parse a \s-1DER\s0 file:
.PP
.Vb 1
\& openssl asn1parse \-inform DER \-in file.der
.Ve
.PP
Generate a simple UTF8String:
.PP
.Vb 1
\& openssl asn1parse \-genstr \*(AqUTF8:Hello World\*(Aq
.Ve
.PP
Generate and write out a UTF8String, don't print parsed output:
.PP
.Vb 1
\& openssl asn1parse \-genstr \*(AqUTF8:Hello World\*(Aq \-noout \-out utf8.der
.Ve
.PP
Generate using a config file:
.PP
.Vb 1
\& openssl asn1parse \-genconf asn1.cnf \-noout \-out asn1.der
.Ve
.PP
Example config file:
.PP
.Vb 1
\& asn1=SEQUENCE:seq_sect
\&
\& [seq_sect]
\&
\& field1=BOOL:TRUE
\& field2=EXP:0, UTF8:some random string
.Ve
.SH "BUGS"
.IX Header "BUGS"
There should be options to change the format of output lines. The output of some
\&\s-1ASN.1\s0 types is not well handled (if at all).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIASN1_generate_nconf\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2017 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

${this.title}

Code Editor : asn1parse.1