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
156
157
|
/*
* Copyright (C) 2009 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "pki.h"
#include <credentials/certificates/certificate.h>
#include <credentials/certificates/x509.h>
/**
* Extract a public key from a private key/certificate
*/
static int pub()
{
key_encoding_type_t form = KEY_PUB_SPKI_ASN1_DER;
credential_type_t type = CRED_PRIVATE_KEY;
int subtype = KEY_RSA;
certificate_t *cert;
private_key_t *private;
public_key_t *public;
chunk_t encoding;
char *file = NULL;
void *cred;
char *arg;
while (TRUE)
{
switch (command_getopt(&arg))
{
case 'h':
return command_usage(NULL);
case 't':
if (streq(arg, "rsa"))
{
type = CRED_PRIVATE_KEY;
subtype = KEY_RSA;
}
else if (streq(arg, "ecdsa"))
{
type = CRED_PRIVATE_KEY;
subtype = KEY_ECDSA;
}
else if (streq(arg, "pkcs10"))
{
type = CRED_CERTIFICATE;
subtype = CERT_PKCS10_REQUEST;
}
else if (streq(arg, "x509"))
{
type = CRED_CERTIFICATE;
subtype = CERT_X509;
}
else
{
return command_usage("invalid input type");
}
continue;
case 'f':
if (!get_form(arg, &form, TRUE))
{
return command_usage("invalid output format");
}
continue;
case 'i':
file = arg;
continue;
case EOF:
break;
default:
return command_usage("invalid --pub option");
}
break;
}
if (file)
{
cred = lib->creds->create(lib->creds, type, subtype,
BUILD_FROM_FILE, file, BUILD_END);
}
else
{
cred = lib->creds->create(lib->creds, type, subtype,
BUILD_FROM_FD, 0, BUILD_END);
}
if (type == CRED_PRIVATE_KEY)
{
private = cred;
if (!private)
{
fprintf(stderr, "parsing private key failed\n");
return 1;
}
public = private->get_public_key(private);
private->destroy(private);
}
else
{
cert = cred;
if (!cert)
{
fprintf(stderr, "parsing certificate failed\n");
return 1;
}
public = cert->get_public_key(cert);
cert->destroy(cert);
}
if (!public)
{
fprintf(stderr, "extracting public key failed\n");
return 1;
}
if (!public->get_encoding(public, form, &encoding))
{
fprintf(stderr, "public key encoding failed\n");
public->destroy(public);
return 1;
}
public->destroy(public);
if (fwrite(encoding.ptr, encoding.len, 1, stdout) != 1)
{
fprintf(stderr, "writing public key failed\n");
free(encoding.ptr);
return 1;
}
free(encoding.ptr);
return 0;
}
/**
* Register the command.
*/
static void __attribute__ ((constructor))reg()
{
command_register((command_t) {
pub, 'p', "pub",
"extract the public key from a private key/certificate",
{"[--in file] [--type rsa|ecdsa|pkcs10|x509] [--outform der|pem|pgp]"},
{
{"help", 'h', 0, "show usage information"},
{"in", 'i', 1, "input file, default: stdin"},
{"type", 't', 1, "type of credential, default: rsa"},
{"outform", 'f', 1, "encoding of extracted public key"},
}
});
}
|
