openssl crl

CRL utility 

openssl command


openssl crl [-help] [-inform PEM|DER] [-outform PEM|DER] [-text] [-in filename] [-out filename] [-nameopt option] [-noout] [-hash] [-issuer] [-lastupdate] [-nextupdate] [-CAfile file] [-CApath dir]


The crl command processes CRL files in DER or PEM format.



Print out a usage message.

-inform DER|PEM 

This specifies the input format. DER format is DER encoded CRL structure. PEM (the default) is a base64 encoded version of the DER form with header and footer lines.

-outform DER|PEM 

specifies the output format, the options have the same meaning and default as the -inform option.

-in filename 

specifies the input file name to read from or standard input if this option is not specified.

-out filename 

specifies the output file name to write to or standard output by default.


print out the CRL in text form.

-nameopt option 

option which determines how the subject or issuer names are displayed. See the description of -nameopt in x509.


does not output the encoded version of the CRL.


outputs a hash of the issuer name. This can be use to lookup CRLs in a directory by issuer name.


outputs the "hash" of the CRL issuer name using the older algorithm as used by OpenSSL versions before 1.0.0.


outputs the issuer name.


outputs the lastUpdate field.


outputs the nextUpdate field.

-CAfile file 

verifies the signature on a CRL by looking up the issuing certificate in file.

-CApath dir 

verify the signature on a CRL by looking up the issuing certificate in dir. This directory must be a standard certificate directory: that is a hash of each subject name (using x509 -hash) should be linked to each certificate.


The PEM CRL format uses the header and footer lines:

-----BEGIN X509 CRL-----
-----END X509 CRL-----


Convert a CRL file from PEM to DER:

openssl crl -in crl.pem -outform DER -out crl.der

Output the text form of a DER encoded certificate:

openssl crl -in crl.der -inform DER -text -noout


Ideally it should be possible to create a CRL using appropriate options and files too.


Copyright 2000-2018 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 here: OpenSSL.


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openssl ca, openssl crl2pkcs7, openssl x509

PTC MKS Toolkit 10.4 Documentation Build 39.