crl — CRL utility
opensslcrl [-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.
- -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.
- 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).
- don't output the encoded version of the CRL.
- output 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.
- output the issuer name.
- output the lastUpdate field.
- 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.