CRL

crl − CRL utility

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

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

−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.

−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.

−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.

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 −text −noout

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

crl2pkcs7(1), ca(1), x509(1)