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 | } |