Coverage Report

Created: 2022-01-17 10:46

/libfido2/src/info.c
Line
Count
Source (jump to first uncovered line)
1
/*
2
 * Copyright (c) 2018-2021 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 "fido.h"
8
9
static int
10
decode_string(const cbor_item_t *item, void *arg)
11
50.3k
{
12
50.3k
        fido_str_array_t        *a = arg;
13
50.3k
        const size_t             i = a->len;
14
15
        /* keep ptr[x] and len consistent */
16
50.3k
        if (cbor_string_copy(item, &a->ptr[i]) < 0) {
17
92
                fido_log_debug("%s: cbor_string_copy", __func__);
18
92
                return (-1);
19
92
        }
20
21
50.2k
        a->len++;
22
23
50.2k
        return (0);
24
50.2k
}
25
26
static int
27
decode_string_array(const cbor_item_t *item, fido_str_array_t *v)
28
20.2k
{
29
20.2k
        v->ptr = NULL;
30
20.2k
        v->len = 0;
31
32
20.2k
        if (cbor_isa_array(item) == false ||
33
20.2k
            cbor_array_is_definite(item) == false) {
34
62
                fido_log_debug("%s: cbor type", __func__);
35
62
                return (-1);
36
62
        }
37
38
20.2k
        v->ptr = calloc(cbor_array_size(item), sizeof(char *));
39
20.2k
        if (v->ptr == NULL)
40
20.2k
                return (-1);
41
42
20.1k
        if (cbor_array_iter(item, v, decode_string) < 0) {
43
100
                fido_log_debug("%s: decode_string", __func__);
44
100
                return (-1);
45
100
        }
46
47
20.0k
        return (0);
48
20.0k
}
49
50
static int
51
decode_aaguid(const cbor_item_t *item, unsigned char *aaguid, size_t aaguid_len)
52
9.33k
{
53
9.33k
        if (cbor_isa_bytestring(item) == false ||
54
9.33k
            cbor_bytestring_is_definite(item) == false ||
55
9.33k
            cbor_bytestring_length(item) != aaguid_len) {
56
103
                fido_log_debug("%s: cbor type", __func__);
57
103
                return (-1);
58
103
        }
59
60
9.23k
        memcpy(aaguid, cbor_bytestring_handle(item), aaguid_len);
61
62
9.23k
        return (0);
63
9.23k
}
64
65
static int
66
decode_option(const cbor_item_t *key, const cbor_item_t *val, void *arg)
67
50.8k
{
68
50.8k
        fido_opt_array_t        *o = arg;
69
50.8k
        const size_t             i = o->len;
70
71
50.8k
        if (cbor_isa_float_ctrl(val) == false ||
72
50.8k
            cbor_float_get_width(val) != CBOR_FLOAT_0 ||
73
50.8k
            cbor_is_bool(val) == false) {
74
3.21k
                fido_log_debug("%s: cbor type", __func__);
75
3.21k
                return (0); /* ignore */
76
3.21k
        }
77
78
47.5k
        if (cbor_string_copy(key, &o->name[i]) < 0) {
79
249
                fido_log_debug("%s: cbor_string_copy", __func__);
80
249
                return (0); /* ignore */
81
249
        }
82
83
        /* keep name/value and len consistent */
84
47.3k
        o->value[i] = cbor_ctrl_value(val) == CBOR_CTRL_TRUE;
85
47.3k
        o->len++;
86
87
47.3k
        return (0);
88
47.3k
}
89
90
static int
91
decode_options(const cbor_item_t *item, fido_opt_array_t *o)
92
9.04k
{
93
9.04k
        o->name = NULL;
94
9.04k
        o->value = NULL;
95
9.04k
        o->len = 0;
96
97
9.04k
        if (cbor_isa_map(item) == false ||
98
9.04k
            cbor_map_is_definite(item) == false) {
99
40
                fido_log_debug("%s: cbor type", __func__);
100
40
                return (-1);
101
40
        }
102
103
9.00k
        o->name = calloc(cbor_map_size(item), sizeof(char *));
104
9.00k
        o->value = calloc(cbor_map_size(item), sizeof(bool));
105
9.00k
        if (o->name == NULL || o->value == NULL)
106
9.00k
                return (-1);
107
108
8.97k
        return (cbor_map_iter(item, o, decode_option));
109
8.97k
}
110
111
static int
112
decode_protocol(const cbor_item_t *item, void *arg)
113
11.7k
{
114
11.7k
        fido_byte_array_t       *p = arg;
115
11.7k
        const size_t             i = p->len;
116
117
11.7k
        if (cbor_isa_uint(item) == false ||
118
11.7k
            cbor_int_get_width(item) != CBOR_INT_8) {
119
77
                fido_log_debug("%s: cbor type", __func__);
120
77
                return (-1);
121
77
        }
122
123
        /* keep ptr[x] and len consistent */
124
11.6k
        p->ptr[i] = cbor_get_uint8(item);
125
11.6k
        p->len++;
126
127
11.6k
        return (0);
128
11.6k
}
129
130
static int
131
decode_protocols(const cbor_item_t *item, fido_byte_array_t *p)
132
8.91k
{
133
8.91k
        p->ptr = NULL;
134
8.91k
        p->len = 0;
135
136
8.91k
        if (cbor_isa_array(item) == false ||
137
8.91k
            cbor_array_is_definite(item) == false) {
138
44
                fido_log_debug("%s: cbor type", __func__);
139
44
                return (-1);
140
44
        }
141
142
8.86k
        p->ptr = calloc(cbor_array_size(item), sizeof(uint8_t));
143
8.86k
        if (p->ptr == NULL)
144
8.86k
                return (-1);
145
146
8.85k
        if (cbor_array_iter(item, p, decode_protocol) < 0) {
147
84
                fido_log_debug("%s: decode_protocol", __func__);
148
84
                return (-1);
149
84
        }
150
151
8.77k
        return (0);
152
8.77k
}
153
154
static int
155
decode_algorithm_entry(const cbor_item_t *key, const cbor_item_t *val,
156
    void *arg)
157
25.4k
{
158
25.4k
        fido_algo_t *alg = arg;
159
25.4k
        char *name = NULL;
160
25.4k
        int ok = -1;
161
162
25.4k
        if (cbor_string_copy(key, &name) < 0) {
163
256
                fido_log_debug("%s: cbor type", __func__);
164
256
                ok = 0; /* ignore */
165
256
                goto out;
166
256
        }
167
168
25.2k
        if (!strcmp(name, "alg")) {
169
10.9k
                if (cbor_isa_negint(val) == false ||
170
10.9k
                    cbor_get_int(val) > INT_MAX || alg->cose != 0) {
171
402
                        fido_log_debug("%s: alg", __func__);
172
402
                        goto out;
173
402
                }
174
10.5k
                alg->cose = -(int)cbor_get_int(val) - 1;
175
14.2k
        } else if (!strcmp(name, "type")) {
176
9.39k
                if (cbor_string_copy(val, &alg->type) < 0) {
177
39
                        fido_log_debug("%s: type", __func__);
178
39
                        goto out;
179
39
                }
180
24.7k
        }
181
182
24.7k
        ok = 0;
183
25.4k
out:
184
25.4k
        free(name);
185
186
25.4k
        return (ok);
187
24.7k
}
188
189
static int
190
decode_algorithm(const cbor_item_t *item, void *arg)
191
13.6k
{
192
13.6k
        fido_algo_array_t *aa = arg;
193
13.6k
        const size_t i = aa->len;
194
195
13.6k
        if (cbor_isa_map(item) == false ||
196
13.6k
            cbor_map_is_definite(item) == false) {
197
131
                fido_log_debug("%s: cbor type", __func__);
198
131
                return (-1);
199
131
        }
200
201
13.5k
        memset(&aa->ptr[i], 0, sizeof(aa->ptr[i]));
202
203
13.5k
        if (cbor_map_iter(item, &aa->ptr[i], decode_algorithm_entry) < 0) {
204
723
                fido_log_debug("%s: decode_algorithm_entry", __func__);
205
723
                fido_algo_free(&aa->ptr[i]);
206
723
                return (-1);
207
723
        }
208
209
        /* keep ptr[x] and len consistent */
210
12.8k
        aa->len++;
211
212
12.8k
        return (0);
213
12.8k
}
214
215
static int
216
decode_algorithms(const cbor_item_t *item, fido_algo_array_t *aa)
217
6.94k
{
218
6.94k
        aa->ptr = NULL;
219
6.94k
        aa->len = 0;
220
221
6.94k
        if (cbor_isa_array(item) == false ||
222
6.94k
            cbor_array_is_definite(item) == false) {
223
44
                fido_log_debug("%s: cbor type", __func__);
224
44
                return (-1);
225
44
        }
226
227
6.90k
        aa->ptr = calloc(cbor_array_size(item), sizeof(fido_algo_t));
228
6.90k
        if (aa->ptr == NULL)
229
6.90k
                return (-1);
230
231
6.88k
        if (cbor_array_iter(item, aa, decode_algorithm) < 0) {
232
863
                fido_log_debug("%s: decode_algorithm", __func__);
233
863
                return (-1);
234
863
        }
235
236
6.02k
        return (0);
237
6.02k
}
238
239
static int
240
parse_reply_element(const cbor_item_t *key, const cbor_item_t *val, void *arg)
241
90.7k
{
242
90.7k
        fido_cbor_info_t *ci = arg;
243
244
90.7k
        if (cbor_isa_uint(key) == false ||
245
90.7k
            cbor_int_get_width(key) != CBOR_INT_8) {
246
3.65k
                fido_log_debug("%s: cbor type", __func__);
247
3.65k
                return (0); /* ignore */
248
3.65k
        }
249
250
87.0k
        switch (cbor_get_uint8(key)) {
251
9.43k
        case 1: /* versions */
252
9.43k
                return (decode_string_array(val, &ci->versions));
253
10.1k
        case 2: /* extensions */
254
10.1k
                return (decode_string_array(val, &ci->extensions));
255
9.33k
        case 3: /* aaguid */
256
9.33k
                return (decode_aaguid(val, ci->aaguid, sizeof(ci->aaguid)));
257
9.04k
        case 4: /* options */
258
9.04k
                return (decode_options(val, &ci->options));
259
9.20k
        case 5: /* maxMsgSize */
260
9.20k
                return (cbor_decode_uint64(val, &ci->maxmsgsiz));
261
8.91k
        case 6: /* pinProtocols */
262
8.91k
                return (decode_protocols(val, &ci->protocols));
263
8.51k
        case 7: /* maxCredentialCountInList */
264
8.51k
                return (cbor_decode_uint64(val, &ci->maxcredcntlst));
265
8.43k
        case 8: /* maxCredentialIdLength */
266
8.43k
                return (cbor_decode_uint64(val, &ci->maxcredidlen));
267
732
        case 9: /* transports */
268
732
                return (decode_string_array(val, &ci->transports));
269
6.94k
        case 10: /* algorithms */
270
6.94k
                return (decode_algorithms(val, &ci->algorithms));
271
598
        case 14: /* fwVersion */
272
598
                return (cbor_decode_uint64(val, &ci->fwversion));
273
560
        case 15: /* maxCredBlobLen */
274
560
                return (cbor_decode_uint64(val, &ci->maxcredbloblen));
275
5.25k
        default: /* ignore */
276
5.25k
                fido_log_debug("%s: cbor type", __func__);
277
5.25k
                return (0);
278
87.0k
        }
279
87.0k
}
280
281
static int
282
fido_dev_get_cbor_info_tx(fido_dev_t *dev, int *ms)
283
22.3k
{
284
22.3k
        const unsigned char cbor[] = { CTAP_CBOR_GETINFO };
285
286
22.3k
        fido_log_debug("%s: dev=%p", __func__, (void *)dev);
287
288
22.3k
        if (fido_tx(dev, CTAP_CMD_CBOR, cbor, sizeof(cbor), ms) < 0) {
289
291
                fido_log_debug("%s: fido_tx", __func__);
290
291
                return (FIDO_ERR_TX);
291
291
        }
292
293
22.1k
        return (FIDO_OK);
294
22.1k
}
295
296
static int
297
fido_dev_get_cbor_info_rx(fido_dev_t *dev, fido_cbor_info_t *ci, int *ms)
298
22.1k
{
299
22.1k
        unsigned char   reply[FIDO_MAXMSG];
300
22.1k
        int             reply_len;
301
302
22.1k
        fido_log_debug("%s: dev=%p, ci=%p, ms=%d", __func__, (void *)dev,
303
22.1k
            (void *)ci, *ms);
304
305
22.1k
        fido_cbor_info_reset(ci);
306
307
22.1k
        if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply),
308
22.1k
            ms)) < 0) {
309
5.34k
                fido_log_debug("%s: fido_rx", __func__);
310
5.34k
                return (FIDO_ERR_RX);
311
5.34k
        }
312
313
16.7k
        return (cbor_parse_reply(reply, (size_t)reply_len, ci,
314
16.7k
            parse_reply_element));
315
16.7k
}
316
317
int
318
fido_dev_get_cbor_info_wait(fido_dev_t *dev, fido_cbor_info_t *ci, int *ms)
319
22.3k
{
320
22.3k
        int r;
321
322
#ifdef USE_WINHELLO
323
        if (dev->flags & FIDO_DEV_WINHELLO)
324
                return (fido_winhello_get_cbor_info(dev, ci));
325
#endif
326
22.3k
        if ((r = fido_dev_get_cbor_info_tx(dev, ms)) != FIDO_OK ||
327
22.3k
            (r = fido_dev_get_cbor_info_rx(dev, ci, ms)) != FIDO_OK)
328
22.3k
                return (r);
329
330
8.98k
        return (FIDO_OK);
331
8.98k
}
332
333
int
334
fido_dev_get_cbor_info(fido_dev_t *dev, fido_cbor_info_t *ci)
335
303
{
336
303
        int ms = dev->timeout_ms;
337
338
303
        return (fido_dev_get_cbor_info_wait(dev, ci, &ms));
339
303
}
340
341
/*
342
 * get/set functions for fido_cbor_info_t; always at the end of the file
343
 */
344
345
fido_cbor_info_t *
346
fido_cbor_info_new(void)
347
22.4k
{
348
22.4k
        return (calloc(1, sizeof(fido_cbor_info_t)));
349
22.4k
}
350
351
void
352
fido_cbor_info_reset(fido_cbor_info_t *ci)
353
44.4k
{
354
44.4k
        fido_str_array_free(&ci->versions);
355
44.4k
        fido_str_array_free(&ci->extensions);
356
44.4k
        fido_str_array_free(&ci->transports);
357
44.4k
        fido_opt_array_free(&ci->options);
358
44.4k
        fido_byte_array_free(&ci->protocols);
359
44.4k
        fido_algo_array_free(&ci->algorithms);
360
44.4k
}
361
362
void
363
fido_cbor_info_free(fido_cbor_info_t **ci_p)
364
70.9k
{
365
70.9k
        fido_cbor_info_t *ci;
366
367
70.9k
        if (ci_p == NULL || (ci = *ci_p) ==  NULL)
368
70.9k
                return;
369
22.3k
        fido_cbor_info_reset(ci);
370
22.3k
        free(ci);
371
22.3k
        *ci_p = NULL;
372
22.3k
}
373
374
char **
375
fido_cbor_info_versions_ptr(const fido_cbor_info_t *ci)
376
310
{
377
310
        return (ci->versions.ptr);
378
310
}
379
380
size_t
381
fido_cbor_info_versions_len(const fido_cbor_info_t *ci)
382
613
{
383
613
        return (ci->versions.len);
384
613
}
385
386
char **
387
fido_cbor_info_extensions_ptr(const fido_cbor_info_t *ci)
388
9.08k
{
389
9.08k
        return (ci->extensions.ptr);
390
9.08k
}
391
392
size_t
393
fido_cbor_info_extensions_len(const fido_cbor_info_t *ci)
394
9.38k
{
395
9.38k
        return (ci->extensions.len);
396
9.38k
}
397
398
char **
399
fido_cbor_info_transports_ptr(const fido_cbor_info_t *ci)
400
46
{
401
46
        return (ci->transports.ptr);
402
46
}
403
404
size_t
405
fido_cbor_info_transports_len(const fido_cbor_info_t *ci)
406
349
{
407
349
        return (ci->transports.len);
408
349
}
409
410
const unsigned char *
411
fido_cbor_info_aaguid_ptr(const fido_cbor_info_t *ci)
412
303
{
413
303
        return (ci->aaguid);
414
303
}
415
416
size_t
417
fido_cbor_info_aaguid_len(const fido_cbor_info_t *ci)
418
303
{
419
303
        return (sizeof(ci->aaguid));
420
303
}
421
422
char **
423
fido_cbor_info_options_name_ptr(const fido_cbor_info_t *ci)
424
9.09k
{
425
9.09k
        return (ci->options.name);
426
9.09k
}
427
428
const bool *
429
fido_cbor_info_options_value_ptr(const fido_cbor_info_t *ci)
430
9.09k
{
431
9.09k
        return (ci->options.value);
432
9.09k
}
433
434
size_t
435
fido_cbor_info_options_len(const fido_cbor_info_t *ci)
436
9.39k
{
437
9.39k
        return (ci->options.len);
438
9.39k
}
439
440
uint64_t
441
fido_cbor_info_maxcredbloblen(const fido_cbor_info_t *ci)
442
303
{
443
303
        return (ci->maxcredbloblen);
444
303
}
445
446
uint64_t
447
fido_cbor_info_maxmsgsiz(const fido_cbor_info_t *ci)
448
9.27k
{
449
9.27k
        return (ci->maxmsgsiz);
450
9.27k
}
451
452
uint64_t
453
fido_cbor_info_maxcredcntlst(const fido_cbor_info_t *ci)
454
303
{
455
303
        return (ci->maxcredcntlst);
456
303
}
457
458
uint64_t
459
fido_cbor_info_maxcredidlen(const fido_cbor_info_t *ci)
460
303
{
461
303
        return (ci->maxcredidlen);
462
303
}
463
464
uint64_t
465
fido_cbor_info_fwversion(const fido_cbor_info_t *ci)
466
303
{
467
303
        return (ci->fwversion);
468
303
}
469
470
const uint8_t *
471
fido_cbor_info_protocols_ptr(const fido_cbor_info_t *ci)
472
9.27k
{
473
9.27k
        return (ci->protocols.ptr);
474
9.27k
}
475
476
size_t
477
fido_cbor_info_protocols_len(const fido_cbor_info_t *ci)
478
9.27k
{
479
9.27k
        return (ci->protocols.len);
480
9.27k
}
481
482
size_t
483
fido_cbor_info_algorithm_count(const fido_cbor_info_t *ci)
484
647
{
485
647
        return (ci->algorithms.len);
486
647
}
487
488
const char *
489
fido_cbor_info_algorithm_type(const fido_cbor_info_t *ci, size_t idx)
490
344
{
491
344
        if (idx >= ci->algorithms.len)
492
303
                return (NULL);
493
494
41
        return (ci->algorithms.ptr[idx].type);
495
41
}
496
497
int
498
fido_cbor_info_algorithm_cose(const fido_cbor_info_t *ci, size_t idx)
499
344
{
500
344
        if (idx >= ci->algorithms.len)
501
303
                return (0);
502
503
41
        return (ci->algorithms.ptr[idx].cose);
504
41
}