Coverage Report

Created: 2023-09-23 17:42

/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
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 * license that can be found in the LICENSE file.
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 * SPDX-License-Identifier: BSD-2-Clause
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 */
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8
#include "fido.h"
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10
static int
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parse_authkey(const cbor_item_t *key, const cbor_item_t *val, void *arg)
12
4.56k
{
13
4.56k
        es256_pk_t *authkey = arg;
14
15
4.56k
        if (cbor_isa_uint(key) == false ||
16
4.56k
            cbor_int_get_width(key) != CBOR_INT_8 ||
17
4.56k
            cbor_get_uint8(key) != 1) {
18
551
                fido_log_debug("%s: cbor type", __func__);
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551
                return (0); /* ignore */
20
551
        }
21
22
4.01k
        return (es256_pk_decode(val, authkey));
23
4.56k
}
24
25
static int
26
fido_dev_authkey_tx(fido_dev_t *dev, int *ms)
27
6.42k
{
28
6.42k
        fido_blob_t      f;
29
6.42k
        cbor_item_t     *argv[2];
30
6.42k
        int              r;
31
32
6.42k
        fido_log_debug("%s: dev=%p", __func__, (void *)dev);
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6.42k
        memset(&f, 0, sizeof(f));
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6.42k
        memset(argv, 0, sizeof(argv));
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        /* add command parameters */
38
6.42k
        if ((argv[0] = cbor_encode_pin_opt(dev)) == NULL ||
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6.42k
            (argv[1] = cbor_build_uint8(2)) == NULL) {
40
1.91k
                fido_log_debug("%s: cbor_build", __func__);
41
1.91k
                r = FIDO_ERR_INTERNAL;
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1.91k
                goto fail;
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1.91k
        }
44
45
        /* frame and transmit */
46
4.51k
        if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv),
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4.51k
            &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) {
48
45
                fido_log_debug("%s: fido_tx", __func__);
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45
                r = FIDO_ERR_TX;
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45
                goto fail;
51
45
        }
52
53
4.46k
        r = FIDO_OK;
54
6.42k
fail:
55
6.42k
        cbor_vector_free(argv, nitems(argv));
56
6.42k
        free(f.ptr);
57
58
6.42k
        return (r);
59
4.46k
}
60
61
static int
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fido_dev_authkey_rx(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
63
4.46k
{
64
4.46k
        unsigned char   *msg;
65
4.46k
        int              msglen;
66
4.46k
        int              r;
67
68
4.46k
        fido_log_debug("%s: dev=%p, authkey=%p, ms=%d", __func__, (void *)dev,
69
4.46k
            (void *)authkey, *ms);
70
71
4.46k
        memset(authkey, 0, sizeof(*authkey));
72
73
4.46k
        if ((msg = malloc(FIDO_MAXMSG)) == NULL) {
74
11
                r = FIDO_ERR_INTERNAL;
75
11
                goto out;
76
11
        }
77
78
4.45k
        if ((msglen = fido_rx(dev, CTAP_CMD_CBOR, msg, FIDO_MAXMSG, ms)) < 0) {
79
219
                fido_log_debug("%s: fido_rx", __func__);
80
219
                r = FIDO_ERR_RX;
81
219
                goto out;
82
219
        }
83
84
4.23k
        r = cbor_parse_reply(msg, (size_t)msglen, authkey, parse_authkey);
85
4.46k
out:
86
4.46k
        freezero(msg, FIDO_MAXMSG);
87
88
4.46k
        return (r);
89
4.23k
}
90
91
static int
92
fido_dev_authkey_wait(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
93
6.42k
{
94
6.42k
        int r;
95
96
6.42k
        if ((r = fido_dev_authkey_tx(dev, ms)) != FIDO_OK ||
97
6.42k
            (r = fido_dev_authkey_rx(dev, authkey, ms)) != FIDO_OK)
98
2.48k
                return (r);
99
100
3.94k
        return (FIDO_OK);
101
6.42k
}
102
103
int
104
fido_dev_authkey(fido_dev_t *dev, es256_pk_t *authkey, int *ms)
105
6.42k
{
106
6.42k
        return (fido_dev_authkey_wait(dev, authkey, ms));
107
6.42k
}