- NAME
- SYNOPSIS
- DESCRIPTION
- COMMAND OPTIONS
- NOTES
- EXAMPLES
- BUGS
- SEE ALSO

# 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.

-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.

# SEE ALSO

crl2pkcs7, ca, x509