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CRL

Section: OpenSSL (1)
Updated: 2017-05-25
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NAME

crl - CRL utility

SYNOPSIS

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

DESCRIPTION

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

COMMAND OPTIONS

-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: This specifies the output format, the options have the same meaning as the -inform option.
-in filename: This specifies the input filename to read from or standard input if this option is not specified.
-out filename: specifies the output filename to write to or standard output by default.
-text: 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(1).
-noout: don't output the encoded version of the CRL.
-hash: output a hash of the issuer name. This can be use to lookup CRLs in a directory by issuer name.
-hash_old: outputs the ``hash'' of the CRL issuer name using the older algorithm as used by OpenSSL versions before 1.0.0.
-issuer: output the issuer name.
-lastupdate: output the lastUpdate field.
-nextupdate: output the nextUpdate field.
-CAfile file: verify 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.

NOTES

The PEM CRL format uses the header and footer lines:

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

EXAMPLES

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 -text -noout

BUGS

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