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
158
159
160
|
/*
* Copyright (c) 2020 [Ribose Inc](https://www.ribose.com).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <iostream>
#include <cstdint>
#include "librepgp/stream-key.h"
#include "librepgp/stream-packet.h"
#include "fingerprint.h"
#include "pgp-key.h"
#include "crypto/signatures.h"
static bool
load_transferable_key(pgp_transferable_key_t *key, const char *fname)
{
pgp_source_t src = {};
bool res = !init_file_src(&src, fname) && !process_pgp_key(src, key, false);
src_close(&src);
return res;
}
bool calculate_primary_binding(const pgp_key_pkt_t &key,
const pgp_key_pkt_t &subkey,
pgp_hash_alg_t halg,
pgp_signature_t & sig,
rnp::Hash & hash,
rnp::RNG & rng);
int
main(int argc, char **argv)
{
if (argc < 3) {
std::cout << "Generate test file with subkey, signed by the other key.\n Usage: "
"./generate ../alice-sub-sec.asc ../basil-sec.asc\n";
return 1;
}
pgp_transferable_key_t tpkey = {};
pgp_transferable_key_t tskey = {};
if (!load_transferable_key(&tpkey, argv[1])) {
std::cout << "Failed to load first key.\n";
return 1;
}
if (!load_transferable_key(&tskey, argv[2])) {
std::cout << "Failed to load second key.\n";
return 1;
}
pgp_transferable_subkey_t *subkey =
(pgp_transferable_subkey_t *) list_front(tpkey.subkeys);
pgp_signature_t *binding = (pgp_signature_t *) list_front(subkey->signatures);
if (decrypt_secret_key(&tskey.key, "password")) {
RNP_LOG("Failed to decrypt secret key");
return 1;
}
if (decrypt_secret_key(&subkey->subkey, "password")) {
RNP_LOG("Failed to decrypt secret subkey");
return 1;
}
/* now let's rebuild binding using the other key */
uint8_t keyid[PGP_KEY_ID_SIZE];
pgp_fingerprint_t keyfp;
free(binding->hashed_data);
binding->hashed_data = NULL;
binding->hashed_len = 0;
pgp_keyid(keyid, sizeof(keyid), tskey.key);
pgp_fingerprint(&keyfp, tskey.key);
binding->halg = pgp_hash_adjust_alg_to_key(binding->halg, &tskey.key);
binding->palg = tskey.key.alg;
binding->set_keyfp(keyfp);
/* This requires transition to rnp::Hash once will be used */
rnp::Hash hash;
rnp::Hash hashcp;
binding->fill_hashed_data();
if (!signature_hash_binding(binding, &tpkey.key, &subkey->subkey, &hash) ||
!pgp_hash_copy(&hashcp, &hash)) {
RNP_LOG("failed to hash signature");
return 1;
}
rnp::RNG rng(rnp::RNG::Type::System);
if (signature_calculate(binding, &tskey.key.material, &hash, &rng)) {
RNP_LOG("failed to calculate signature");
return 1;
}
pgp_key_flags_t realkf = (pgp_key_flags_t) binding.key_flags();
if (!realkf) {
realkf = pgp_pk_alg_capabilities(subkey->subkey.alg);
}
if (realkf & PGP_KF_SIGN) {
pgp_signature_t embsig = {};
bool embres;
if (!calculate_primary_binding(
&tpkey.key, &subkey->subkey, binding->halg, &embsig, &hashcp, &rng)) {
RNP_LOG("failed to calculate primary key binding signature");
return 1;
}
embres = signature_set_embedded_sig(binding, &embsig);
free_signature(&embsig);
if (!embres) {
RNP_LOG("failed to add primary key binding signature");
return 1;
}
}
try {
binding->set_keyid(keyid);
} catch (const std::exception &e) {
RNP_LOG("failed to set issuer key id: %s", e.what());
return 1;
}
if (!transferable_key_to_public(&tpkey)) {
RNP_LOG("Failed to extract public key part.");
return 1;
}
pgp_dest_t dst = {};
init_stdout_dest(&dst);
write_transferable_key(tpkey, dst, true);
dst_close(&dst, false);
transferable_key_destroy(&tpkey);
transferable_key_destroy(&tskey);
return 0;
}
|
