CRL2PKCS7

crl2pkcs7 − Create a PKCS#7 structure from a CRL and certificates.

openssl crl2pkcs7 [−inform PEM|DER] [−outform PEM|DER] [−in filename] [−out filename] [−certfile filename] [−nocrl]

The crl2pkcs7 command takes an optional CRL and one or more certificates and converts them into a PKCS#7 degenerate "certificates only" structure.

−inform DER|PEM

This specifies the CRL 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 PKCS#7 structure output format. DER format is DER encoded PKCS#7 structure. PEM (the default) is a base64 encoded version of the DER form with header and footer lines.

−in filename

This specifies the input filename to read a CRL from or standard input if this option is not specified.

−out filename

specifies the output filename to write the PKCS#7 structure to or standard output by default.

−certfile filename

specifies a filename containing one or more certificates in PEM format. All certificates in the file will be added to the PKCS#7 structure. This option can be used more than once to read certificates form multiple files.

−nocrl

normally a CRL is included in the output file. With this option no CRL is included in the output file and a CRL is not read from the input file.

Create a PKCS#7 structure from a certificate and CRL:

 openssl crl2pkcs7 −in crl.pem −certfile cert.pem −out p7.pem

Creates a PKCS#7 structure in DER format with no CRL from several different certificates:

 openssl crl2pkcs7 −nocrl −certfile newcert.pem
        −certfile demoCA/cacert.pem −outform DER −out p7.der

The output file is a PKCS#7 signed data structure containing no signers and just certificates and an optional CRL .

This utility can be used to send certificates and CAs to Netscape as part of the certificate enrollment process. This involves sending the DER encoded output as MIME type application/x−x509−user−cert.

The PEM encoded form with the header and footer lines removed can be used to install user certificates and CAs in MSIE using the Xenroll control.

pkcs7(1)