Synopsis
openssl crl [-inform PEM|DER] [-outform PEM|DER] [-text] [-in filename] [-out filename] [-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. 
-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.
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  | 
Restrictions
Ideally it should be possible to create a CRL using appropriate
options and files too. 
SEE ALSO
crl2pkcs7(1), ca(1), x509(1)