=pod

=head1 NAME

openssl-crl2pkcs7,

crl2pkcs7 - Create a PKCS#7 structure from a CRL and certificates

=head1 SYNOPSIS

B<openssl> B<crl2pkcs7>

[B<-help>]

[B<-inform PEM|DER>]

[B<-outform PEM|DER>]

[B<-in filename>]

[B<-out filename>]

[B<-certfile filename>]

[B<-nocrl>]

=head1 DESCRIPTION

The B<crl2pkcs7> command takes an optional CRL and one or more

certificates and converts them into a PKCS#7 degenerate "certificates

only" structure.

=head1 OPTIONS

=over 4

=item B<-help>

Print out a usage message.

=item B<-inform DER|PEM>

This specifies the CRL input format. B<DER> format is DER encoded CRL

structure.B<PEM> (the default) is a base64 encoded version of

the DER form with header and footer lines. The default format is PEM.

=item B<-outform DER|PEM>

This specifies the PKCS#7 structure output format. B<DER> format is DER

encoded PKCS#7 structure.B<PEM> (the default) is a base64 encoded version of

the DER form with header and footer lines. The default format is PEM.

=item B<-in filename>

This specifies the input filename to read a CRL from or standard input if this

option is not specified.

=item B<-out filename>

Specifies the output filename to write the PKCS#7 structure to or standard

output by default.

=item B<-certfile filename>

Specifies a filename containing one or more certificates in B<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.

=item B<-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.

=back

=head1 EXAMPLES

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

=head1 NOTES

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 B<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.

=head1 SEE ALSO

L<pkcs7(1)>

=head1 COPYRIGHT

Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the "License").  You may not use

this file except in compliance with the License.  You can obtain a copy

in the file LICENSE in the source distribution or at

L<https://www.openssl.org/source/license.html>.

=cut