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.\" ========================================================================
.\"
.IX Title "CRL 1"
.TH CRL 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\-crl, crl \- CRL utility
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBopenssl\fR \fBcrl\fR
[\fB\-help\fR]
[\fB\-inform PEM|DER\fR]
[\fB\-outform PEM|DER\fR]
[\fB\-text\fR]
[\fB\-in filename\fR]
[\fB\-out filename\fR]
[\fB\-nameopt option\fR]
[\fB\-noout\fR]
[\fB\-hash\fR]
[\fB\-issuer\fR]
[\fB\-lastupdate\fR]
[\fB\-nextupdate\fR]
[\fB\-CAfile file\fR]
[\fB\-CApath dir\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBcrl\fR command processes \s-1CRL\s0 files in \s-1DER\s0 or \s-1PEM\s0 format.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-help\fR" 4
.IX Item "-help"
Print out a usage message.
.IP "\fB\-inform DER|PEM\fR" 4
.IX Item "-inform DER|PEM"
This specifies the input format. \fB\s-1DER\s0\fR format is \s-1DER\s0 encoded \s-1CRL\s0
structure. \fB\s-1PEM\s0\fR (the default) is a base64 encoded version of
the \s-1DER\s0 form with header and footer lines.
.IP "\fB\-outform DER|PEM\fR" 4
.IX Item "-outform DER|PEM"
This specifies the output format, the options have the same meaning and default
as the \fB\-inform\fR option.
.IP "\fB\-in filename\fR" 4
.IX Item "-in filename"
This specifies the input filename to read from or standard input if this
option is not specified.
.IP "\fB\-out filename\fR" 4
.IX Item "-out filename"
Specifies the output filename to write to or standard output by
default.
.IP "\fB\-text\fR" 4
.IX Item "-text"
Print out the \s-1CRL\s0 in text form.
.IP "\fB\-nameopt option\fR" 4
.IX Item "-nameopt option"
Option which determines how the subject or issuer names are displayed. See
the description of \fB\-nameopt\fR in \fBx509\fR\|(1).
.IP "\fB\-noout\fR" 4
.IX Item "-noout"
Don't output the encoded version of the \s-1CRL.\s0
.IP "\fB\-hash\fR" 4
.IX Item "-hash"
Output a hash of the issuer name. This can be use to lookup CRLs in
a directory by issuer name.
.IP "\fB\-hash_old\fR" 4
.IX Item "-hash_old"
Outputs the \*(L"hash\*(R" of the \s-1CRL\s0 issuer name using the older algorithm
as used by OpenSSL before version 1.0.0.
.IP "\fB\-issuer\fR" 4
.IX Item "-issuer"
Output the issuer name.
.IP "\fB\-lastupdate\fR" 4
.IX Item "-lastupdate"
Output the lastUpdate field.
.IP "\fB\-nextupdate\fR" 4
.IX Item "-nextupdate"
Output the nextUpdate field.
.IP "\fB\-CAfile file\fR" 4
.IX Item "-CAfile file"
Verify the signature on a \s-1CRL\s0 by looking up the issuing certificate in
\&\fBfile\fR.
.IP "\fB\-CApath dir\fR" 4
.IX Item "-CApath dir"
Verify the signature on a \s-1CRL\s0 by looking up the issuing certificate in
\&\fBdir\fR. This directory must be a standard certificate directory: that
is a hash of each subject name (using \fBx509 \-hash\fR) should be linked
to each certificate.
.SH "NOTES"
.IX Header "NOTES"
The \s-1PEM CRL\s0 format uses the header and footer lines:
.PP
.Vb 2
\& \-\-\-\-\-BEGIN X509 CRL\-\-\-\-\-
\& \-\-\-\-\-END X509 CRL\-\-\-\-\-
.Ve
.SH "EXAMPLES"
.IX Header "EXAMPLES"
Convert a \s-1CRL\s0 file from \s-1PEM\s0 to \s-1DER:\s0
.PP
.Vb 1
\& openssl crl \-in crl.pem \-outform DER \-out crl.der
.Ve
.PP
Output the text form of a \s-1DER\s0 encoded certificate:
.PP
.Vb 1
\& openssl crl \-in crl.der \-inform DER \-text \-noout
.Ve
.SH "BUGS"
.IX Header "BUGS"
Ideally it should be possible to create a \s-1CRL\s0 using appropriate options
and files too.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBcrl2pkcs7\fR\|(1), \fBca\fR\|(1), \fBx509\fR\|(1)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2018 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>.