diff options
Diffstat (limited to 'examples/select.c')
-rw-r--r-- | examples/select.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/examples/select.c b/examples/select.c new file mode 100644 index 0000000..1fb2960 --- /dev/null +++ b/examples/select.c | |||
@@ -0,0 +1,215 @@ | |||
1 | /* | ||
2 | * Copyright (c) 2020 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 <errno.h> | ||
8 | #include <stdbool.h> | ||
9 | #include <stdio.h> | ||
10 | #include <stdlib.h> | ||
11 | #include <time.h> | ||
12 | |||
13 | #include "fido.h" | ||
14 | #include "../openbsd-compat/openbsd-compat.h" | ||
15 | |||
16 | #define FIDO_POLL_MS 50 | ||
17 | |||
18 | #if defined(_MSC_VER) | ||
19 | static int | ||
20 | nanosleep(const struct timespec *rqtp, struct timespec *rmtp) | ||
21 | { | ||
22 | if (rmtp != NULL) { | ||
23 | errno = EINVAL; | ||
24 | return (-1); | ||
25 | } | ||
26 | |||
27 | Sleep(rqtp->tv_nsec / 1000000); | ||
28 | |||
29 | return (0); | ||
30 | } | ||
31 | #endif | ||
32 | |||
33 | static fido_dev_t * | ||
34 | open_dev(const fido_dev_info_t *di) | ||
35 | { | ||
36 | fido_dev_t *dev; | ||
37 | int r; | ||
38 | |||
39 | if ((dev = fido_dev_new()) == NULL) { | ||
40 | warnx("%s: fido_dev_new", __func__); | ||
41 | return (NULL); | ||
42 | } | ||
43 | |||
44 | if ((r = fido_dev_open(dev, fido_dev_info_path(di))) != FIDO_OK) { | ||
45 | warnx("%s: fido_dev_open %s: %s", __func__, | ||
46 | fido_dev_info_path(di), fido_strerr(r)); | ||
47 | fido_dev_free(&dev); | ||
48 | return (NULL); | ||
49 | } | ||
50 | |||
51 | printf("%s (0x%04x:0x%04x) is %s\n", fido_dev_info_path(di), | ||
52 | fido_dev_info_vendor(di), fido_dev_info_product(di), | ||
53 | fido_dev_is_fido2(dev) ? "fido2" : "u2f"); | ||
54 | |||
55 | return (dev); | ||
56 | } | ||
57 | |||
58 | static int | ||
59 | select_dev(const fido_dev_info_t *devlist, size_t ndevs, fido_dev_t **dev, | ||
60 | size_t *idx, int secs) | ||
61 | { | ||
62 | const fido_dev_info_t *di; | ||
63 | fido_dev_t **devtab; | ||
64 | struct timespec ts_start; | ||
65 | struct timespec ts_now; | ||
66 | struct timespec ts_delta; | ||
67 | struct timespec ts_pause; | ||
68 | size_t nopen = 0; | ||
69 | int touched; | ||
70 | int r; | ||
71 | long ms_remain; | ||
72 | |||
73 | *dev = NULL; | ||
74 | *idx = 0; | ||
75 | |||
76 | printf("%u authenticator(s) detected\n", (unsigned)ndevs); | ||
77 | |||
78 | if (ndevs == 0) | ||
79 | return (0); /* nothing to do */ | ||
80 | |||
81 | if ((devtab = calloc(ndevs, sizeof(*devtab))) == NULL) { | ||
82 | warn("%s: calloc", __func__); | ||
83 | return (-1); | ||
84 | } | ||
85 | |||
86 | for (size_t i = 0; i < ndevs; i++) { | ||
87 | di = fido_dev_info_ptr(devlist, i); | ||
88 | if ((devtab[i] = open_dev(di)) != NULL) { | ||
89 | *idx = i; | ||
90 | nopen++; | ||
91 | } | ||
92 | } | ||
93 | |||
94 | printf("%u authenticator(s) opened\n", (unsigned)nopen); | ||
95 | |||
96 | if (nopen < 2) { | ||
97 | if (nopen == 1) | ||
98 | *dev = devtab[*idx]; /* single candidate */ | ||
99 | r = 0; | ||
100 | goto out; | ||
101 | } | ||
102 | |||
103 | for (size_t i = 0; i < ndevs; i++) { | ||
104 | di = fido_dev_info_ptr(devlist, i); | ||
105 | if (devtab[i] == NULL) | ||
106 | continue; /* failed to open */ | ||
107 | if ((r = fido_dev_get_touch_begin(devtab[i])) != FIDO_OK) { | ||
108 | warnx("%s: fido_dev_get_touch_begin %s: %s", __func__, | ||
109 | fido_dev_info_path(di), fido_strerr(r)); | ||
110 | r = -1; | ||
111 | goto out; | ||
112 | } | ||
113 | } | ||
114 | |||
115 | if (clock_gettime(CLOCK_MONOTONIC, &ts_start) != 0) { | ||
116 | warn("%s: clock_gettime", __func__); | ||
117 | r = -1; | ||
118 | goto out; | ||
119 | } | ||
120 | |||
121 | ts_pause.tv_sec = 0; | ||
122 | ts_pause.tv_nsec = 200000000; /* 200ms */ | ||
123 | |||
124 | do { | ||
125 | nanosleep(&ts_pause, NULL); | ||
126 | |||
127 | for (size_t i = 0; i < ndevs; i++) { | ||
128 | di = fido_dev_info_ptr(devlist, i); | ||
129 | if (devtab[i] == NULL) { | ||
130 | /* failed to open or discarded */ | ||
131 | continue; | ||
132 | } | ||
133 | if ((r = fido_dev_get_touch_status(devtab[i], &touched, | ||
134 | FIDO_POLL_MS)) != FIDO_OK) { | ||
135 | warnx("%s: fido_dev_get_touch_status %s: %s", | ||
136 | __func__, fido_dev_info_path(di), | ||
137 | fido_strerr(r)); | ||
138 | fido_dev_close(devtab[i]); | ||
139 | fido_dev_free(&devtab[i]); | ||
140 | continue; /* discard */ | ||
141 | } | ||
142 | if (touched) { | ||
143 | *dev = devtab[i]; | ||
144 | *idx = i; | ||
145 | r = 0; | ||
146 | goto out; | ||
147 | } | ||
148 | } | ||
149 | |||
150 | if (clock_gettime(CLOCK_MONOTONIC, &ts_now) != 0) { | ||
151 | warn("%s: clock_gettime", __func__); | ||
152 | r = -1; | ||
153 | goto out; | ||
154 | } | ||
155 | |||
156 | timespecsub(&ts_now, &ts_start, &ts_delta); | ||
157 | ms_remain = (secs * 1000) - ((long)ts_delta.tv_sec * 1000) + | ||
158 | ((long)ts_delta.tv_nsec / 1000000); | ||
159 | } while (ms_remain > FIDO_POLL_MS); | ||
160 | |||
161 | printf("timeout after %d seconds\n", secs); | ||
162 | r = -1; | ||
163 | out: | ||
164 | if (r != 0) { | ||
165 | *dev = NULL; | ||
166 | *idx = 0; | ||
167 | } | ||
168 | |||
169 | for (size_t i = 0; i < ndevs; i++) { | ||
170 | if (devtab[i] && devtab[i] != *dev) { | ||
171 | fido_dev_cancel(devtab[i]); | ||
172 | fido_dev_close(devtab[i]); | ||
173 | fido_dev_free(&devtab[i]); | ||
174 | } | ||
175 | } | ||
176 | |||
177 | free(devtab); | ||
178 | |||
179 | return (r); | ||
180 | } | ||
181 | |||
182 | int | ||
183 | main(void) | ||
184 | { | ||
185 | const fido_dev_info_t *di; | ||
186 | fido_dev_info_t *devlist; | ||
187 | fido_dev_t *dev; | ||
188 | size_t idx; | ||
189 | size_t ndevs; | ||
190 | int r; | ||
191 | |||
192 | fido_init(0); | ||
193 | |||
194 | if ((devlist = fido_dev_info_new(64)) == NULL) | ||
195 | errx(1, "fido_dev_info_new"); | ||
196 | |||
197 | if ((r = fido_dev_info_manifest(devlist, 64, &ndevs)) != FIDO_OK) | ||
198 | errx(1, "fido_dev_info_manifest: %s (0x%x)", fido_strerr(r), r); | ||
199 | if (select_dev(devlist, ndevs, &dev, &idx, 15) != 0) | ||
200 | errx(1, "select_dev"); | ||
201 | if (dev == NULL) | ||
202 | errx(1, "no authenticator found"); | ||
203 | |||
204 | di = fido_dev_info_ptr(devlist, idx); | ||
205 | printf("%s: %s by %s (PIN %sset)\n", fido_dev_info_path(di), | ||
206 | fido_dev_info_product_string(di), | ||
207 | fido_dev_info_manufacturer_string(di), | ||
208 | fido_dev_has_pin(dev) ? "" : "un"); | ||
209 | |||
210 | fido_dev_close(dev); | ||
211 | fido_dev_free(&dev); | ||
212 | fido_dev_info_free(&devlist, ndevs); | ||
213 | |||
214 | exit(0); | ||
215 | } | ||