blob: 655f1358074a1b6db2e479cb289d8f3b11048c9f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
=pod
=head1 NAME
openssl-spkac,
spkac - SPKAC printing and generating utility
=head1 SYNOPSIS
B<openssl> B<spkac>
[B<-help>]
[B<-in filename>]
[B<-out filename>]
[B<-key keyfile>]
[B<-keyform PEM|DER|ENGINE>]
[B<-passin arg>]
[B<-challenge string>]
[B<-pubkey>]
[B<-spkac spkacname>]
[B<-spksect section>]
[B<-noout>]
[B<-verify>]
[B<-engine id>]
=head1 DESCRIPTION
The B<spkac> command processes Netscape signed public key and challenge
(SPKAC) files. It can print out their contents, verify the signature and
produce its own SPKACs from a supplied private key.
=head1 OPTIONS
=over 4
=item B<-help>
Print out a usage message.
=item B<-in filename>
This specifies the input filename to read from or standard input if this
option is not specified. Ignored if the B<-key> option is used.
=item B<-out filename>
Specifies the output filename to write to or standard output by
default.
=item B<-key keyfile>
Create an SPKAC file using the private key in B<keyfile>. The
B<-in>, B<-noout>, B<-spksect> and B<-verify> options are ignored if
present.
=item B<-keyform PEM|DER|ENGINE>
Whether the key format is PEM, DER, or an engine-backed key.
The default is PEM.
=item B<-passin password>
The input file password source. For more information about the format of B<arg>
see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)>.
=item B<-challenge string>
Specifies the challenge string if an SPKAC is being created.
=item B<-spkac spkacname>
Allows an alternative name form the variable containing the
SPKAC. The default is "SPKAC". This option affects both
generated and input SPKAC files.
=item B<-spksect section>
Allows an alternative name form the section containing the
SPKAC. The default is the default section.
=item B<-noout>
Don't output the text version of the SPKAC (not used if an
SPKAC is being created).
=item B<-pubkey>
Output the public key of an SPKAC (not used if an SPKAC is
being created).
=item B<-verify>
Verifies the digital signature on the supplied SPKAC.
=item B<-engine id>
Specifying an engine (by its unique B<id> string) will cause B<spkac>
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.
=back
=head1 EXAMPLES
Print out the contents of an SPKAC:
openssl spkac -in spkac.cnf
Verify the signature of an SPKAC:
openssl spkac -in spkac.cnf -noout -verify
Create an SPKAC using the challenge string "hello":
openssl spkac -key key.pem -challenge hello -out spkac.cnf
Example of an SPKAC, (long lines split up for clarity):
SPKAC=MIG5MGUwXDANBgkqhkiG9w0BAQEFAANLADBIAkEA\
1cCoq2Wa3Ixs47uI7FPVwHVIPDx5yso105Y6zpozam135a\
8R0CpoRvkkigIyXfcCjiVi5oWk+6FfPaD03uPFoQIDAQAB\
FgVoZWxsbzANBgkqhkiG9w0BAQQFAANBAFpQtY/FojdwkJ\
h1bEIYuc2EeM2KHTWPEepWYeawvHD0gQ3DngSC75YCWnnD\
dq+NQ3F+X4deMx9AaEglZtULwV4=
=head1 NOTES
A created SPKAC with suitable DN components appended can be fed into
the B<ca> utility.
SPKACs are typically generated by Netscape when a form is submitted
containing the B<KEYGEN> tag as part of the certificate enrollment
process.
The challenge string permits a primitive form of proof of possession
of private key. By checking the SPKAC signature and a random challenge
string some guarantee is given that the user knows the private key
corresponding to the public key being certified. This is important in
some applications. Without this it is possible for a previous SPKAC
to be used in a "replay attack".
=head1 SEE ALSO
L<ca(1)>
=head1 COPYRIGHT
Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL 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
L<https://www.openssl.org/source/license.html>.
=cut
|
