pkcs7(1)
NAME
pkcs7 - PKCS#7 utility
SYNOPSIS
openssl pkcs7 [-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.
COMMAND OPTIONS
- -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 it's unique id string) will cause req 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:
- openssl pkcs7 -in file.pem -outform DER -out file.der
- Output all certificates in a file:
openssl 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.