1=pod
2
3=head1 NAME
4
5pkcs7 - PKCS#7 utility
6
7=head1 SYNOPSIS
8
9B<openssl> B<pkcs7>
10[B<-inform PEM|DER>]
11[B<-outform PEM|DER>]
12[B<-in filename>]
13[B<-out filename>]
14[B<-print_certs>]
15[B<-text>]
16[B<-noout>]
17[B<-engine id>]
18
19=head1 DESCRIPTION
20
21The B<pkcs7> command processes PKCS#7 files in DER or PEM format.
22
23=head1 COMMAND OPTIONS
24
25=over 4
26
27=item B<-inform DER|PEM>
28
29This specifies the input format. B<DER> format is DER encoded PKCS#7
30v1.5 structure.B<PEM> (the default) is a base64 encoded version of
31the DER form with header and footer lines.
32
33=item B<-outform DER|PEM>
34
35This specifies the output format, the options have the same meaning as the 
36B<-inform> option.
37
38=item B<-in filename>
39
40This specifies the input filename to read from or standard input if this
41option is not specified.
42
43=item B<-out filename>
44
45specifies the output filename to write to or standard output by
46default.
47
48=item B<-print_certs>
49
50prints out any certificates or CRLs contained in the file. They are
51preceded by their subject and issuer names in one line format.
52
53=item B<-text>
54
55prints out certificates details in full rather than just subject and
56issuer names.
57
58=item B<-noout>
59
60don't output the encoded version of the PKCS#7 structure (or certificates
61is B<-print_certs> is set).
62
63=item B<-engine id>
64
65specifying an engine (by its unique B<id> string) will cause B<pkcs7>
66to attempt to obtain a functional reference to the specified engine,
67thus initialising it if needed. The engine will then be set as the default
68for all available algorithms.
69
70=back
71
72=head1 EXAMPLES
73
74Convert a PKCS#7 file from PEM to DER:
75
76 openssl pkcs7 -in file.pem -outform DER -out file.der
77
78Output all certificates in a file:
79
80 openssl pkcs7 -in file.pem -print_certs -out certs.pem
81
82=head1 NOTES
83
84The PEM PKCS#7 format uses the header and footer lines:
85
86 -----BEGIN PKCS7-----
87 -----END PKCS7-----
88
89For compatibility with some CAs it will also accept:
90
91 -----BEGIN CERTIFICATE-----
92 -----END CERTIFICATE-----
93
94=head1 RESTRICTIONS
95
96There is no option to print out all the fields of a PKCS#7 file.
97
98This PKCS#7 routines only understand PKCS#7 v 1.5 as specified in RFC2315 they 
99cannot currently parse, for example, the new CMS as described in RFC2630.
100
101=head1 SEE ALSO
102
103L<crl2pkcs7(1)|crl2pkcs7(1)>
104
105=cut
106