Coverage Report

Created: 2020-09-01 07:05

/libfido2/src/authkey.c
Line
Count
Source
1
/*
2
 * Copyright (c) 2018 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
 */
6
7
#include <string.h>
8
#include "fido.h"
9
10
static int
11
parse_authkey(const cbor_item_t *key, const cbor_item_t *val, void *arg)
12
3.50k
{
13
3.50k
        es256_pk_t *authkey = arg;
14
3.50k
15
3.50k
        if (cbor_isa_uint(key) == false ||
16
3.50k
            cbor_int_get_width(key) != CBOR_INT_8 ||
17
3.50k
            cbor_get_uint8(key) != 1) {
18
320
                fido_log_debug("%s: cbor type", __func__);
19
320
                return (0); /* ignore */
20
320
        }
21
3.18k
22
3.18k
        return (es256_pk_decode(val, authkey));
23
3.18k
}
24
25
static int
26
fido_dev_authkey_tx(fido_dev_t *dev)
27
4.34k
{
28
4.34k
        fido_blob_t      f;
29
4.34k
        cbor_item_t     *argv[2];
30
4.34k
        int              r;
31
4.34k
32
4.34k
        fido_log_debug("%s: dev=%p", __func__, (void *)dev);
33
4.34k
34
4.34k
        memset(&f, 0, sizeof(f));
35
4.34k
        memset(argv, 0, sizeof(argv));
36
4.34k
37
4.34k
        /* add command parameters */
38
4.34k
        if ((argv[0] = cbor_build_uint8(1)) == NULL ||
39
4.34k
            (argv[1] = cbor_build_uint8(2)) == NULL) {
40
32
                fido_log_debug("%s: cbor_build", __func__);
41
32
                r = FIDO_ERR_INTERNAL;
42
32
                goto fail;
43
32
        }
44
4.31k
45
4.31k
        /* frame and transmit */
46
4.31k
        if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv),
47
4.31k
            &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len) < 0) {
48
126
                fido_log_debug("%s: fido_tx", __func__);
49
126
                r = FIDO_ERR_TX;
50
126
                goto fail;
51
126
        }
52
4.18k
53
4.18k
        r = FIDO_OK;
54
4.34k
fail:
55
4.34k
        cbor_vector_free(argv, nitems(argv));
56
4.34k
        free(f.ptr);
57
4.34k
58
4.34k
        return (r);
59
4.18k
}
60
61
static int
62
fido_dev_authkey_rx(fido_dev_t *dev, es256_pk_t *authkey, int ms)
63
4.18k
{
64
4.18k
        unsigned char   reply[FIDO_MAXMSG];
65
4.18k
        int             reply_len;
66
4.18k
67
4.18k
        fido_log_debug("%s: dev=%p, authkey=%p, ms=%d", __func__, (void *)dev,
68
4.18k
            (void *)authkey, ms);
69
4.18k
70
4.18k
        memset(authkey, 0, sizeof(*authkey));
71
4.18k
72
4.18k
        if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply),
73
4.18k
            ms)) < 0) {
74
709
                fido_log_debug("%s: fido_rx", __func__);
75
709
                return (FIDO_ERR_RX);
76
709
        }
77
3.47k
78
3.47k
        return (cbor_parse_reply(reply, (size_t)reply_len, authkey,
79
3.47k
            parse_authkey));
80
3.47k
}
81
82
static int
83
fido_dev_authkey_wait(fido_dev_t *dev, es256_pk_t *authkey, int ms)
84
4.34k
{
85
4.34k
        int r;
86
4.34k
87
4.34k
        if ((r = fido_dev_authkey_tx(dev)) != FIDO_OK ||
88
4.34k
            (r = fido_dev_authkey_rx(dev, authkey, ms)) != FIDO_OK)
89
4.34k
                return (r);
90
3.07k
91
3.07k
        return (FIDO_OK);
92
3.07k
}
93
94
int
95
fido_dev_authkey(fido_dev_t *dev, es256_pk_t *authkey)
96
4.34k
{
97
4.34k
        return (fido_dev_authkey_wait(dev, authkey, -1));
98
4.34k
}