- NAME
- SYNOPSIS
- DESCRIPTION
- OPTIONS
- EXAMPLES
- NOTES
- RESTRICTIONS
- SEE ALSO
- COPYRIGHT

# NAME

pkcs7 - PKCS#7 utility

# SYNOPSIS

gmssl pkcs7 [-help] [-inform PEM|DER] [-outform PEM|DER] [-in filename] [-out filename] [-print_certs] [-text] [-noout] [-engine id]

# DESCRIPTION

The pkcs7 command processes PKCS#7 files in DER or PEM format.

# OPTIONS

-help

  Print out a usage message.

-inform DER|PEM

  This specifies the input format. DER format is DER encoded PKCS#7 v1.5 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_certs

  prints out any certificates or CRLs contained in the file. They are preceded by their subject and issuer names in one line format.

-text

  prints out certificates details in full rather than just subject and issuer names.

-noout

  don't output the encoded version of the PKCS#7 structure (or certificates is -print_certs is set).

-engine id

  specifying an engine (by its unique id string) will cause pkcs7 to attempt to obtain a functional reference to the specified engine, thus initialising it if needed. The engine will then be set as the default for all available algorithms.

# EXAMPLES

Convert a PKCS#7 file from PEM to DER:

     gmssl pkcs7 -in file.pem -outform DER -out file.der

Output all certificates in a file:

     gmssl pkcs7 -in file.pem -print_certs -out certs.pem

# NOTES

The PEM PKCS#7 format uses the header and footer lines:

     -----BEGIN PKCS7-----
     -----END PKCS7-----

For compatibility with some CAs it will also accept:

     -----BEGIN CERTIFICATE-----
     -----END CERTIFICATE-----

# RESTRICTIONS

There is no option to print out all the fields of a PKCS#7 file.

This PKCS#7 routines only understand PKCS#7 v 1.5 as specified in RFC2315 they cannot currently parse, for example, the new CMS as described in RFC2630.

# SEE ALSO

COPYRIGHT

Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the GmSSL 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 https://www.openssl.org/source/license.html.