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 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:
openssl pkcs7 -in file.pem -outform DER -out file.der
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.
