Coverage Report

Created: 2022-07-22 12:05

/libfido2/src/authkey.c
Line
Count
Source
1
/*
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 * 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
 */
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7
#include "fido.h"
8
9
static int
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parse_authkey(const cbor_item_t *key, const cbor_item_t *val, void *arg)
11
1.80k
{
12
1.80k
        es256_pk_t *authkey = arg;
13
14
1.80k
        if (cbor_isa_uint(key) == false ||
15
1.80k
            cbor_int_get_width(key) != CBOR_INT_8 ||
16
1.80k
            cbor_get_uint8(key) != 1) {
17
98
                fido_log_debug("%s: cbor type", __func__);
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98
                return (0); /* ignore */
19
98
        }
20
21
1.70k
        return (es256_pk_decode(val, authkey));
22
1.80k
}
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static int
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fido_dev_authkey_tx(fido_dev_t *dev, int *ms)
26
3.36k
{
27
3.36k
        fido_blob_t      f;
28
3.36k
        cbor_item_t     *argv[2];
29
3.36k
        int              r;
30
31
3.36k
        fido_log_debug("%s: dev=%p", __func__, (void *)dev);
32
33
3.36k
        memset(&f, 0, sizeof(f));
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3.36k
        memset(argv, 0, sizeof(argv));
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36
        /* add command parameters */
37
3.36k
        if ((argv[0] = cbor_encode_pin_opt(dev)) == NULL ||
38
3.36k
            (argv[1] = cbor_build_uint8(2)) == NULL) {
39
1.35k
                fido_log_debug("%s: cbor_build", __func__);
40
1.35k
                r = FIDO_ERR_INTERNAL;
41
1.35k
                goto fail;
42
1.35k
        }
43
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        /* frame and transmit */
45
2.00k
        if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv),
46
2.00k
            &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) {
47
38
                fido_log_debug("%s: fido_tx", __func__);
48
38
                r = FIDO_ERR_TX;
49
38
                goto fail;
50
38
        }
51
52
1.96k
        r = FIDO_OK;
53
3.36k
fail:
54
3.36k
        cbor_vector_free(argv, nitems(argv));
55
3.36k
        free(f.ptr);
56
57
3.36k
        return (r);
58
1.96k
}
59
60
static int
61
fido_dev_authkey_rx(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
62
1.96k
{
63
1.96k
        unsigned char   *msg;
64
1.96k
        int              msglen;
65
1.96k
        int              r;
66
67
1.96k
        fido_log_debug("%s: dev=%p, authkey=%p, ms=%d", __func__, (void *)dev,
68
1.96k
            (void *)authkey, *ms);
69
70
1.96k
        memset(authkey, 0, sizeof(*authkey));
71
72
1.96k
        if ((msg = malloc(FIDO_MAXMSG)) == NULL) {
73
6
                r = FIDO_ERR_INTERNAL;
74
6
                goto out;
75
6
        }
76
77
1.95k
        if ((msglen = fido_rx(dev, CTAP_CMD_CBOR, msg, FIDO_MAXMSG, ms)) < 0) {
78
157
                fido_log_debug("%s: fido_rx", __func__);
79
157
                r = FIDO_ERR_RX;
80
157
                goto out;
81
157
        }
82
83
1.80k
        r = cbor_parse_reply(msg, (size_t)msglen, authkey, parse_authkey);
84
1.96k
out:
85
1.96k
        freezero(msg, FIDO_MAXMSG);
86
87
1.96k
        return (r);
88
1.80k
}
89
90
static int
91
fido_dev_authkey_wait(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
92
3.36k
{
93
3.36k
        int r;
94
95
3.36k
        if ((r = fido_dev_authkey_tx(dev, ms)) != FIDO_OK ||
96
3.36k
            (r = fido_dev_authkey_rx(dev, authkey, ms)) != FIDO_OK)
97
1.67k
                return (r);
98
99
1.68k
        return (FIDO_OK);
100
3.36k
}
101
102
int
103
fido_dev_authkey(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
104
3.36k
{
105
3.36k
        return (fido_dev_authkey_wait(dev, authkey, ms));
106
3.36k
}