Coverage Report

Created: 2024-06-03 09:43

/libfido2/src/authkey.c
Line
Count
Source
1
/*
2
 * Copyright (c) 2018-2022 Yubico AB. All rights reserved.
3
 * Use of this source code is governed by a BSD-style
4
 * license that can be found in the LICENSE file.
5
 * SPDX-License-Identifier: BSD-2-Clause
6
 */
7
8
#include "fido.h"
9
10
static int
11
parse_authkey(const cbor_item_t *key, const cbor_item_t *val, void *arg)
12
7.56k
{
13
7.56k
        es256_pk_t *authkey = arg;
14
15
7.56k
        if (cbor_isa_uint(key) == false ||
16
7.56k
            cbor_int_get_width(key) != CBOR_INT_8 ||
17
7.56k
            cbor_get_uint8(key) != 1) {
18
682
                fido_log_debug("%s: cbor type", __func__);
19
682
                return (0); /* ignore */
20
682
        }
21
22
6.88k
        return (es256_pk_decode(val, authkey));
23
7.56k
}
24
25
static int
26
fido_dev_authkey_tx(fido_dev_t *dev, int *ms)
27
13.7k
{
28
13.7k
        fido_blob_t      f;
29
13.7k
        cbor_item_t     *argv[2];
30
13.7k
        int              r;
31
32
13.7k
        fido_log_debug("%s: dev=%p", __func__, (void *)dev);
33
34
13.7k
        memset(&f, 0, sizeof(f));
35
13.7k
        memset(argv, 0, sizeof(argv));
36
37
        /* add command parameters */
38
13.7k
        if ((argv[0] = cbor_encode_pin_opt(dev)) == NULL ||
39
13.7k
            (argv[1] = cbor_build_uint8(2)) == NULL) {
40
5.83k
                fido_log_debug("%s: cbor_build", __func__);
41
5.83k
                r = FIDO_ERR_INTERNAL;
42
5.83k
                goto fail;
43
5.83k
        }
44
45
        /* frame and transmit */
46
7.89k
        if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv),
47
7.89k
            &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) {
48
79
                fido_log_debug("%s: fido_tx", __func__);
49
79
                r = FIDO_ERR_TX;
50
79
                goto fail;
51
79
        }
52
53
7.81k
        r = FIDO_OK;
54
13.7k
fail:
55
13.7k
        cbor_vector_free(argv, nitems(argv));
56
13.7k
        free(f.ptr);
57
58
13.7k
        return (r);
59
7.81k
}
60
61
static int
62
fido_dev_authkey_rx(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
63
7.81k
{
64
7.81k
        unsigned char   *msg;
65
7.81k
        int              msglen;
66
7.81k
        int              r;
67
68
7.81k
        fido_log_debug("%s: dev=%p, authkey=%p, ms=%d", __func__, (void *)dev,
69
7.81k
            (void *)authkey, *ms);
70
71
7.81k
        memset(authkey, 0, sizeof(*authkey));
72
73
7.81k
        if ((msg = malloc(FIDO_MAXMSG)) == NULL) {
74
20
                r = FIDO_ERR_INTERNAL;
75
20
                goto out;
76
20
        }
77
78
7.79k
        if ((msglen = fido_rx(dev, CTAP_CMD_CBOR, msg, FIDO_MAXMSG, ms)) < 0) {
79
532
                fido_log_debug("%s: fido_rx", __func__);
80
532
                r = FIDO_ERR_RX;
81
532
                goto out;
82
532
        }
83
84
7.26k
        r = cbor_parse_reply(msg, (size_t)msglen, authkey, parse_authkey);
85
7.81k
out:
86
7.81k
        freezero(msg, FIDO_MAXMSG);
87
88
7.81k
        return (r);
89
7.26k
}
90
91
static int
92
fido_dev_authkey_wait(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
93
13.7k
{
94
13.7k
        int r;
95
96
13.7k
        if ((r = fido_dev_authkey_tx(dev, ms)) != FIDO_OK ||
97
13.7k
            (r = fido_dev_authkey_rx(dev, authkey, ms)) != FIDO_OK)
98
6.99k
                return (r);
99
100
6.74k
        return (FIDO_OK);
101
13.7k
}
102
103
int
104
fido_dev_authkey(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
105
13.7k
{
106
13.7k
        return (fido_dev_authkey_wait(dev, authkey, ms));
107
13.7k
}