pkcs7 — PKCS#7 utility
openssl pkcs7 [-inform PEM|DER] [-outform PEM|DER] [-in filename] [-out filename] [-print_certs] [-text] [-noout] [-engine id]
The pkcs7 command processes PKCS#7 files in DER or PEM format.
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.
This specifies the output format, the options have the same
meaning as the -inform option.
This specifies the input filename to read from or standard
input if this option is not specified.
specifies the output filename to write to or standard output
prints out any certificates or CRLs contained in the file.
They are preceded by their subject and issuer names in one line
prints out certificates details in full rather than just subject
and issuer names.
don't output the encoded version of the PKCS#7 structure (or
certificates is -print_certs is set).
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.
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
The PEM PKCS#7 format uses the header and footer lines:
For compatibility with some CAs it will also accept:
There is no option to print out all the fields of a PKCS#7
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.