Coverage Report

Created: 2021-03-26 11:35

/libfido2/src/authkey.c
Line
Count
Source
1
/*
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 * Copyright (c) 2018 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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 */
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#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
4.10k
{
12
4.10k
        es256_pk_t *authkey = arg;
13
4.10k
14
4.10k
        if (cbor_isa_uint(key) == false ||
15
4.10k
            cbor_int_get_width(key) != CBOR_INT_8 ||
16
4.10k
            cbor_get_uint8(key) != 1) {
17
294
                fido_log_debug("%s: cbor type", __func__);
18
294
                return (0); /* ignore */
19
294
        }
20
3.80k
21
3.80k
        return (es256_pk_decode(val, authkey));
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3.80k
}
23
24
static int
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fido_dev_authkey_tx(fido_dev_t *dev)
26
5.65k
{
27
5.65k
        fido_blob_t      f;
28
5.65k
        cbor_item_t     *argv[2];
29
5.65k
        int              r;
30
5.65k
31
5.65k
        fido_log_debug("%s: dev=%p", __func__, (void *)dev);
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5.65k
33
5.65k
        memset(&f, 0, sizeof(f));
34
5.65k
        memset(argv, 0, sizeof(argv));
35
5.65k
36
5.65k
        /* add command parameters */
37
5.65k
        if ((argv[0] = cbor_encode_pin_opt(dev)) == NULL ||
38
5.65k
            (argv[1] = cbor_build_uint8(2)) == NULL) {
39
1.26k
                fido_log_debug("%s: cbor_build", __func__);
40
1.26k
                r = FIDO_ERR_INTERNAL;
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1.26k
                goto fail;
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1.26k
        }
43
4.39k
44
4.39k
        /* frame and transmit */
45
4.39k
        if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv),
46
4.39k
            &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len) < 0) {
47
52
                fido_log_debug("%s: fido_tx", __func__);
48
52
                r = FIDO_ERR_TX;
49
52
                goto fail;
50
52
        }
51
4.34k
52
4.34k
        r = FIDO_OK;
53
5.65k
fail:
54
5.65k
        cbor_vector_free(argv, nitems(argv));
55
5.65k
        free(f.ptr);
56
5.65k
57
5.65k
        return (r);
58
4.34k
}
59
60
static int
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fido_dev_authkey_rx(fido_dev_t *dev, es256_pk_t *authkey, int ms)
62
4.34k
{
63
4.34k
        unsigned char   reply[FIDO_MAXMSG];
64
4.34k
        int             reply_len;
65
4.34k
66
4.34k
        fido_log_debug("%s: dev=%p, authkey=%p, ms=%d", __func__, (void *)dev,
67
4.34k
            (void *)authkey, ms);
68
4.34k
69
4.34k
        memset(authkey, 0, sizeof(*authkey));
70
4.34k
71
4.34k
        if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply),
72
4.34k
            ms)) < 0) {
73
303
                fido_log_debug("%s: fido_rx", __func__);
74
303
                return (FIDO_ERR_RX);
75
303
        }
76
4.03k
77
4.03k
        return (cbor_parse_reply(reply, (size_t)reply_len, authkey,
78
4.03k
            parse_authkey));
79
4.03k
}
80
81
static int
82
fido_dev_authkey_wait(fido_dev_t *dev, es256_pk_t *authkey, int ms)
83
5.65k
{
84
5.65k
        int r;
85
5.65k
86
5.65k
        if ((r = fido_dev_authkey_tx(dev)) != FIDO_OK ||
87
5.65k
            (r = fido_dev_authkey_rx(dev, authkey, ms)) != FIDO_OK)
88
5.65k
                return (r);
89
3.73k
90
3.73k
        return (FIDO_OK);
91
3.73k
}
92
93
int
94
fido_dev_authkey(fido_dev_t *dev, es256_pk_t *authkey)
95
5.65k
{
96
5.65k
        return (fido_dev_authkey_wait(dev, authkey, -1));
97
5.65k
}