Line | Count | Source (jump to first uncovered line) |
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 <openssl/sha.h> |
8 | | #include "fido.h" |
9 | | #include "fido/es256.h" |
10 | | |
11 | 12 | #define CTAP21_UV_TOKEN_PERM_MAKECRED 0x01 |
12 | 17 | #define CTAP21_UV_TOKEN_PERM_ASSERT 0x02 |
13 | 10 | #define CTAP21_UV_TOKEN_PERM_CRED_MGMT 0x04 |
14 | 8 | #define CTAP21_UV_TOKEN_PERM_BIO 0x08 |
15 | 5 | #define CTAP21_UV_TOKEN_PERM_LARGEBLOB 0x10 |
16 | 23 | #define CTAP21_UV_TOKEN_PERM_CONFIG 0x20 |
17 | | |
18 | | int |
19 | | fido_sha256(fido_blob_t *digest, const u_char *data, size_t data_len) |
20 | 3.05k | { |
21 | 3.05k | if ((digest->ptr = calloc(1, SHA256_DIGEST_LENGTH)) == NULL) |
22 | 14 | return (-1); |
23 | | |
24 | 3.03k | digest->len = SHA256_DIGEST_LENGTH; |
25 | | |
26 | 3.03k | if (SHA256(data, data_len, digest->ptr) != digest->ptr) { |
27 | 14 | fido_blob_reset(digest); |
28 | 14 | return (-1); |
29 | 14 | } |
30 | | |
31 | 3.02k | return (0); |
32 | 3.03k | } |
33 | | |
34 | | static int |
35 | | pin_sha256_enc(const fido_dev_t *dev, const fido_blob_t *shared, |
36 | | const fido_blob_t *pin, fido_blob_t **out) |
37 | 3.07k | { |
38 | 3.07k | fido_blob_t *ph = NULL; |
39 | 3.07k | int r; |
40 | | |
41 | 3.07k | if ((*out = fido_blob_new()) == NULL || |
42 | 3.07k | (ph = fido_blob_new()) == NULL) { |
43 | 23 | r = FIDO_ERR_INTERNAL; |
44 | 23 | goto fail; |
45 | 23 | } |
46 | | |
47 | 3.05k | if (fido_sha256(ph, pin->ptr, pin->len) < 0 || ph->len < 16) { |
48 | 28 | fido_log_debug("%s: SHA256", __func__); |
49 | 28 | r = FIDO_ERR_INTERNAL; |
50 | 28 | goto fail; |
51 | 28 | } |
52 | | |
53 | 3.02k | ph->len = 16; /* first 16 bytes */ |
54 | | |
55 | 3.02k | if (aes256_cbc_enc(dev, shared, ph, *out) < 0) { |
56 | 64 | fido_log_debug("%s: aes256_cbc_enc", __func__); |
57 | 64 | r = FIDO_ERR_INTERNAL; |
58 | 64 | goto fail; |
59 | 64 | } |
60 | | |
61 | 2.95k | r = FIDO_OK; |
62 | 3.07k | fail: |
63 | 3.07k | fido_blob_free(&ph); |
64 | | |
65 | 3.07k | return (r); |
66 | 2.95k | } |
67 | | |
68 | | static int |
69 | | pad64(const char *pin, fido_blob_t **ppin) |
70 | 100 | { |
71 | 100 | size_t pin_len; |
72 | 100 | size_t ppin_len; |
73 | | |
74 | 100 | pin_len = strlen(pin); |
75 | 100 | if (pin_len < 4 || pin_len > 255) { |
76 | 15 | fido_log_debug("%s: invalid pin length", __func__); |
77 | 15 | return (FIDO_ERR_PIN_POLICY_VIOLATION); |
78 | 15 | } |
79 | | |
80 | 85 | if ((*ppin = fido_blob_new()) == NULL) |
81 | 1 | return (FIDO_ERR_INTERNAL); |
82 | | |
83 | 84 | ppin_len = (pin_len + 63U) & ~63U; |
84 | 84 | if (ppin_len < pin_len || ((*ppin)->ptr = calloc(1, ppin_len)) == NULL) { |
85 | 1 | fido_blob_free(ppin); |
86 | 1 | return (FIDO_ERR_INTERNAL); |
87 | 1 | } |
88 | | |
89 | 83 | memcpy((*ppin)->ptr, pin, pin_len); |
90 | 83 | (*ppin)->len = ppin_len; |
91 | | |
92 | 83 | return (FIDO_OK); |
93 | 84 | } |
94 | | |
95 | | static int |
96 | | pin_pad64_enc(const fido_dev_t *dev, const fido_blob_t *shared, |
97 | | const char *pin, fido_blob_t **out) |
98 | 100 | { |
99 | 100 | fido_blob_t *ppin = NULL; |
100 | 100 | int r; |
101 | | |
102 | 100 | if ((r = pad64(pin, &ppin)) != FIDO_OK) { |
103 | 17 | fido_log_debug("%s: pad64", __func__); |
104 | 17 | goto fail; |
105 | 17 | } |
106 | | |
107 | 83 | if ((*out = fido_blob_new()) == NULL) { |
108 | 1 | r = FIDO_ERR_INTERNAL; |
109 | 1 | goto fail; |
110 | 1 | } |
111 | | |
112 | 82 | if (aes256_cbc_enc(dev, shared, ppin, *out) < 0) { |
113 | 4 | fido_log_debug("%s: aes256_cbc_enc", __func__); |
114 | 4 | r = FIDO_ERR_INTERNAL; |
115 | 4 | goto fail; |
116 | 4 | } |
117 | | |
118 | 78 | r = FIDO_OK; |
119 | 100 | fail: |
120 | 100 | fido_blob_free(&ppin); |
121 | | |
122 | 100 | return (r); |
123 | 78 | } |
124 | | |
125 | | static cbor_item_t * |
126 | | encode_uv_permission(uint8_t cmd) |
127 | 75 | { |
128 | 75 | switch (cmd) { |
129 | 17 | case CTAP_CBOR_ASSERT: |
130 | 17 | return (cbor_build_uint8(CTAP21_UV_TOKEN_PERM_ASSERT)); |
131 | 8 | case CTAP_CBOR_BIO_ENROLL_PRE: |
132 | 8 | return (cbor_build_uint8(CTAP21_UV_TOKEN_PERM_BIO)); |
133 | 23 | case CTAP_CBOR_CONFIG: |
134 | 23 | return (cbor_build_uint8(CTAP21_UV_TOKEN_PERM_CONFIG)); |
135 | 12 | case CTAP_CBOR_MAKECRED: |
136 | 12 | return (cbor_build_uint8(CTAP21_UV_TOKEN_PERM_MAKECRED)); |
137 | 10 | case CTAP_CBOR_CRED_MGMT_PRE: |
138 | 10 | return (cbor_build_uint8(CTAP21_UV_TOKEN_PERM_CRED_MGMT)); |
139 | 5 | case CTAP_CBOR_LARGEBLOB: |
140 | 5 | return (cbor_build_uint8(CTAP21_UV_TOKEN_PERM_LARGEBLOB)); |
141 | 0 | default: |
142 | 0 | fido_log_debug("%s: cmd 0x%02x", __func__, cmd); |
143 | 0 | return (NULL); |
144 | 75 | } |
145 | 75 | } |
146 | | |
147 | | static int |
148 | | ctap20_uv_token_tx(fido_dev_t *dev, const char *pin, const fido_blob_t *ecdh, |
149 | | const es256_pk_t *pk, int *ms) |
150 | 2.97k | { |
151 | 2.97k | fido_blob_t f; |
152 | 2.97k | fido_blob_t *p = NULL; |
153 | 2.97k | fido_blob_t *phe = NULL; |
154 | 2.97k | cbor_item_t *argv[6]; |
155 | 2.97k | int r; |
156 | | |
157 | 2.97k | memset(&f, 0, sizeof(f)); |
158 | 2.97k | memset(argv, 0, sizeof(argv)); |
159 | | |
160 | 2.97k | if (pin == NULL) { |
161 | 4 | fido_log_debug("%s: NULL pin", __func__); |
162 | 4 | r = FIDO_ERR_PIN_REQUIRED; |
163 | 4 | goto fail; |
164 | 4 | } |
165 | | |
166 | 2.97k | if ((p = fido_blob_new()) == NULL || fido_blob_set(p, |
167 | 2.96k | (const unsigned char *)pin, strlen(pin)) < 0) { |
168 | 40 | fido_log_debug("%s: fido_blob_set", __func__); |
169 | 40 | r = FIDO_ERR_INVALID_ARGUMENT; |
170 | 40 | goto fail; |
171 | 40 | } |
172 | | |
173 | 2.93k | if ((r = pin_sha256_enc(dev, ecdh, p, &phe)) != FIDO_OK) { |
174 | 92 | fido_log_debug("%s: pin_sha256_enc", __func__); |
175 | 92 | goto fail; |
176 | 92 | } |
177 | | |
178 | 2.83k | if ((argv[0] = cbor_encode_pin_opt(dev)) == NULL || |
179 | 2.83k | (argv[1] = cbor_build_uint8(5)) == NULL || |
180 | 2.83k | (argv[2] = es256_pk_encode(pk, 1)) == NULL || |
181 | 2.83k | (argv[5] = fido_blob_encode(phe)) == NULL) { |
182 | 183 | fido_log_debug("%s: cbor encode", __func__); |
183 | 183 | r = FIDO_ERR_INTERNAL; |
184 | 183 | goto fail; |
185 | 183 | } |
186 | | |
187 | 2.65k | if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv), |
188 | 2.65k | &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) { |
189 | 58 | fido_log_debug("%s: fido_tx", __func__); |
190 | 58 | r = FIDO_ERR_TX; |
191 | 58 | goto fail; |
192 | 58 | } |
193 | | |
194 | 2.59k | r = FIDO_OK; |
195 | 2.97k | fail: |
196 | 2.97k | cbor_vector_free(argv, nitems(argv)); |
197 | 2.97k | fido_blob_free(&p); |
198 | 2.97k | fido_blob_free(&phe); |
199 | 2.97k | free(f.ptr); |
200 | | |
201 | 2.97k | return (r); |
202 | 2.59k | } |
203 | | |
204 | | static int |
205 | | ctap21_uv_token_tx(fido_dev_t *dev, const char *pin, const fido_blob_t *ecdh, |
206 | | const es256_pk_t *pk, uint8_t cmd, const char *rpid, int *ms) |
207 | 147 | { |
208 | 147 | fido_blob_t f; |
209 | 147 | fido_blob_t *p = NULL; |
210 | 147 | fido_blob_t *phe = NULL; |
211 | 147 | cbor_item_t *argv[10]; |
212 | 147 | uint8_t subcmd; |
213 | 147 | int r; |
214 | | |
215 | 147 | memset(&f, 0, sizeof(f)); |
216 | 147 | memset(argv, 0, sizeof(argv)); |
217 | | |
218 | 147 | if (pin != NULL) { |
219 | 109 | if ((p = fido_blob_new()) == NULL || fido_blob_set(p, |
220 | 106 | (const unsigned char *)pin, strlen(pin)) < 0) { |
221 | 11 | fido_log_debug("%s: fido_blob_set", __func__); |
222 | 11 | r = FIDO_ERR_INVALID_ARGUMENT; |
223 | 11 | goto fail; |
224 | 11 | } |
225 | 98 | if ((r = pin_sha256_enc(dev, ecdh, p, &phe)) != FIDO_OK) { |
226 | 20 | fido_log_debug("%s: pin_sha256_enc", __func__); |
227 | 20 | goto fail; |
228 | 20 | } |
229 | 78 | subcmd = 9; /* getPinUvAuthTokenUsingPinWithPermissions */ |
230 | 78 | } else { |
231 | 38 | if (fido_dev_has_uv(dev) == false) { |
232 | 4 | fido_log_debug("%s: fido_dev_has_uv", __func__); |
233 | 4 | r = FIDO_ERR_PIN_REQUIRED; |
234 | 4 | goto fail; |
235 | 4 | } |
236 | 34 | subcmd = 6; /* getPinUvAuthTokenUsingUvWithPermissions */ |
237 | 34 | } |
238 | | |
239 | 112 | if ((argv[0] = cbor_encode_pin_opt(dev)) == NULL || |
240 | 112 | (argv[1] = cbor_build_uint8(subcmd)) == NULL || |
241 | 112 | (argv[2] = es256_pk_encode(pk, 1)) == NULL || |
242 | 112 | (phe != NULL && (argv[5] = fido_blob_encode(phe)) == NULL) || |
243 | 112 | (argv[8] = encode_uv_permission(cmd)) == NULL || |
244 | 112 | (rpid != NULL && (argv[9] = cbor_build_string(rpid)) == NULL)) { |
245 | 46 | fido_log_debug("%s: cbor encode", __func__); |
246 | 46 | r = FIDO_ERR_INTERNAL; |
247 | 46 | goto fail; |
248 | 46 | } |
249 | | |
250 | 66 | if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv), |
251 | 66 | &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) { |
252 | 24 | fido_log_debug("%s: fido_tx", __func__); |
253 | 24 | r = FIDO_ERR_TX; |
254 | 24 | goto fail; |
255 | 24 | } |
256 | | |
257 | 42 | r = FIDO_OK; |
258 | 147 | fail: |
259 | 147 | cbor_vector_free(argv, nitems(argv)); |
260 | 147 | fido_blob_free(&p); |
261 | 147 | fido_blob_free(&phe); |
262 | 147 | free(f.ptr); |
263 | | |
264 | 147 | return (r); |
265 | 42 | } |
266 | | |
267 | | static int |
268 | | parse_uv_token(const cbor_item_t *key, const cbor_item_t *val, void *arg) |
269 | 2.50k | { |
270 | 2.50k | fido_blob_t *token = arg; |
271 | | |
272 | 2.50k | if (cbor_isa_uint(key) == false || |
273 | 2.50k | cbor_int_get_width(key) != CBOR_INT_8 || |
274 | 2.50k | cbor_get_uint8(key) != 2) { |
275 | 179 | fido_log_debug("%s: cbor type", __func__); |
276 | 179 | return (0); /* ignore */ |
277 | 179 | } |
278 | | |
279 | 2.32k | return (fido_blob_decode(val, token)); |
280 | 2.50k | } |
281 | | |
282 | | static int |
283 | | uv_token_rx(fido_dev_t *dev, const fido_blob_t *ecdh, fido_blob_t *token, |
284 | | int *ms) |
285 | 2.63k | { |
286 | 2.63k | fido_blob_t *aes_token = NULL; |
287 | 2.63k | unsigned char reply[FIDO_MAXMSG]; |
288 | 2.63k | int reply_len; |
289 | 2.63k | int r; |
290 | | |
291 | 2.63k | if ((aes_token = fido_blob_new()) == NULL) { |
292 | 6 | r = FIDO_ERR_INTERNAL; |
293 | 6 | goto fail; |
294 | 6 | } |
295 | | |
296 | 2.63k | if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply), |
297 | 2.63k | ms)) < 0) { |
298 | 121 | fido_log_debug("%s: fido_rx", __func__); |
299 | 121 | r = FIDO_ERR_RX; |
300 | 121 | goto fail; |
301 | 121 | } |
302 | | |
303 | 2.51k | if ((r = cbor_parse_reply(reply, (size_t)reply_len, aes_token, |
304 | 2.51k | parse_uv_token)) != FIDO_OK) { |
305 | 148 | fido_log_debug("%s: parse_uv_token", __func__); |
306 | 148 | goto fail; |
307 | 148 | } |
308 | | |
309 | 2.36k | if (aes256_cbc_dec(dev, ecdh, aes_token, token) < 0) { |
310 | 120 | fido_log_debug("%s: aes256_cbc_dec", __func__); |
311 | 120 | r = FIDO_ERR_RX; |
312 | 120 | goto fail; |
313 | 120 | } |
314 | | |
315 | 2.24k | r = FIDO_OK; |
316 | 2.63k | fail: |
317 | 2.63k | fido_blob_free(&aes_token); |
318 | | |
319 | 2.63k | return (r); |
320 | 2.24k | } |
321 | | |
322 | | static int |
323 | | uv_token_wait(fido_dev_t *dev, uint8_t cmd, const char *pin, |
324 | | const fido_blob_t *ecdh, const es256_pk_t *pk, const char *rpid, |
325 | | fido_blob_t *token, int *ms) |
326 | 3.12k | { |
327 | 3.12k | int r; |
328 | | |
329 | 3.12k | if (ecdh == NULL || pk == NULL) |
330 | 0 | return (FIDO_ERR_INVALID_ARGUMENT); |
331 | 3.12k | if (fido_dev_supports_permissions(dev)) |
332 | 147 | r = ctap21_uv_token_tx(dev, pin, ecdh, pk, cmd, rpid, ms); |
333 | 2.97k | else |
334 | 2.97k | r = ctap20_uv_token_tx(dev, pin, ecdh, pk, ms); |
335 | 3.12k | if (r != FIDO_OK) |
336 | 482 | return (r); |
337 | | |
338 | 2.63k | return (uv_token_rx(dev, ecdh, token, ms)); |
339 | 3.12k | } |
340 | | |
341 | | int |
342 | | fido_dev_get_uv_token(fido_dev_t *dev, uint8_t cmd, const char *pin, |
343 | | const fido_blob_t *ecdh, const es256_pk_t *pk, const char *rpid, |
344 | | fido_blob_t *token, int *ms) |
345 | 3.12k | { |
346 | 3.12k | return (uv_token_wait(dev, cmd, pin, ecdh, pk, rpid, token, ms)); |
347 | 3.12k | } |
348 | | |
349 | | static int |
350 | | fido_dev_change_pin_tx(fido_dev_t *dev, const char *pin, const char *oldpin, |
351 | | int *ms) |
352 | 322 | { |
353 | 322 | fido_blob_t f; |
354 | 322 | fido_blob_t *ppine = NULL; |
355 | 322 | fido_blob_t *ecdh = NULL; |
356 | 322 | fido_blob_t *opin = NULL; |
357 | 322 | fido_blob_t *opinhe = NULL; |
358 | 322 | cbor_item_t *argv[6]; |
359 | 322 | es256_pk_t *pk = NULL; |
360 | 322 | int r; |
361 | | |
362 | 322 | memset(&f, 0, sizeof(f)); |
363 | 322 | memset(argv, 0, sizeof(argv)); |
364 | | |
365 | 322 | if ((opin = fido_blob_new()) == NULL || fido_blob_set(opin, |
366 | 321 | (const unsigned char *)oldpin, strlen(oldpin)) < 0) { |
367 | 183 | fido_log_debug("%s: fido_blob_set", __func__); |
368 | 183 | r = FIDO_ERR_INVALID_ARGUMENT; |
369 | 183 | goto fail; |
370 | 183 | } |
371 | | |
372 | 139 | if ((r = fido_do_ecdh(dev, &pk, &ecdh, ms)) != FIDO_OK) { |
373 | 81 | fido_log_debug("%s: fido_do_ecdh", __func__); |
374 | 81 | goto fail; |
375 | 81 | } |
376 | | |
377 | | /* pad and encrypt new pin */ |
378 | 58 | if ((r = pin_pad64_enc(dev, ecdh, pin, &ppine)) != FIDO_OK) { |
379 | 12 | fido_log_debug("%s: pin_pad64_enc", __func__); |
380 | 12 | goto fail; |
381 | 12 | } |
382 | | |
383 | | /* hash and encrypt old pin */ |
384 | 46 | if ((r = pin_sha256_enc(dev, ecdh, opin, &opinhe)) != FIDO_OK) { |
385 | 3 | fido_log_debug("%s: pin_sha256_enc", __func__); |
386 | 3 | goto fail; |
387 | 3 | } |
388 | | |
389 | 43 | if ((argv[0] = cbor_encode_pin_opt(dev)) == NULL || |
390 | 43 | (argv[1] = cbor_build_uint8(4)) == NULL || |
391 | 43 | (argv[2] = es256_pk_encode(pk, 1)) == NULL || |
392 | 43 | (argv[3] = cbor_encode_change_pin_auth(dev, ecdh, ppine, opinhe)) == NULL || |
393 | 43 | (argv[4] = fido_blob_encode(ppine)) == NULL || |
394 | 43 | (argv[5] = fido_blob_encode(opinhe)) == NULL) { |
395 | 12 | fido_log_debug("%s: cbor encode", __func__); |
396 | 12 | r = FIDO_ERR_INTERNAL; |
397 | 12 | goto fail; |
398 | 12 | } |
399 | | |
400 | 31 | if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv), |
401 | 31 | &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) { |
402 | 6 | fido_log_debug("%s: fido_tx", __func__); |
403 | 6 | r = FIDO_ERR_TX; |
404 | 6 | goto fail; |
405 | 6 | } |
406 | | |
407 | 25 | r = FIDO_OK; |
408 | 322 | fail: |
409 | 322 | cbor_vector_free(argv, nitems(argv)); |
410 | 322 | es256_pk_free(&pk); |
411 | 322 | fido_blob_free(&ppine); |
412 | 322 | fido_blob_free(&ecdh); |
413 | 322 | fido_blob_free(&opin); |
414 | 322 | fido_blob_free(&opinhe); |
415 | 322 | free(f.ptr); |
416 | | |
417 | 322 | return (r); |
418 | | |
419 | 25 | } |
420 | | |
421 | | static int |
422 | | fido_dev_set_pin_tx(fido_dev_t *dev, const char *pin, int *ms) |
423 | 327 | { |
424 | 327 | fido_blob_t f; |
425 | 327 | fido_blob_t *ppine = NULL; |
426 | 327 | fido_blob_t *ecdh = NULL; |
427 | 327 | cbor_item_t *argv[5]; |
428 | 327 | es256_pk_t *pk = NULL; |
429 | 327 | int r; |
430 | | |
431 | 327 | memset(&f, 0, sizeof(f)); |
432 | 327 | memset(argv, 0, sizeof(argv)); |
433 | | |
434 | 327 | if ((r = fido_do_ecdh(dev, &pk, &ecdh, ms)) != FIDO_OK) { |
435 | 285 | fido_log_debug("%s: fido_do_ecdh", __func__); |
436 | 285 | goto fail; |
437 | 285 | } |
438 | | |
439 | 42 | if ((r = pin_pad64_enc(dev, ecdh, pin, &ppine)) != FIDO_OK) { |
440 | 10 | fido_log_debug("%s: pin_pad64_enc", __func__); |
441 | 10 | goto fail; |
442 | 10 | } |
443 | | |
444 | 32 | if ((argv[0] = cbor_encode_pin_opt(dev)) == NULL || |
445 | 32 | (argv[1] = cbor_build_uint8(3)) == NULL || |
446 | 32 | (argv[2] = es256_pk_encode(pk, 1)) == NULL || |
447 | 32 | (argv[3] = cbor_encode_pin_auth(dev, ecdh, ppine)) == NULL || |
448 | 32 | (argv[4] = fido_blob_encode(ppine)) == NULL) { |
449 | 7 | fido_log_debug("%s: cbor encode", __func__); |
450 | 7 | r = FIDO_ERR_INTERNAL; |
451 | 7 | goto fail; |
452 | 7 | } |
453 | | |
454 | 25 | if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv), |
455 | 25 | &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) { |
456 | 7 | fido_log_debug("%s: fido_tx", __func__); |
457 | 7 | r = FIDO_ERR_TX; |
458 | 7 | goto fail; |
459 | 7 | } |
460 | | |
461 | 18 | r = FIDO_OK; |
462 | 327 | fail: |
463 | 327 | cbor_vector_free(argv, nitems(argv)); |
464 | 327 | es256_pk_free(&pk); |
465 | 327 | fido_blob_free(&ppine); |
466 | 327 | fido_blob_free(&ecdh); |
467 | 327 | free(f.ptr); |
468 | | |
469 | 327 | return (r); |
470 | 18 | } |
471 | | |
472 | | static int |
473 | | fido_dev_set_pin_wait(fido_dev_t *dev, const char *pin, const char *oldpin, |
474 | | int *ms) |
475 | 649 | { |
476 | 649 | int r; |
477 | | |
478 | 649 | if (oldpin != NULL) { |
479 | 322 | if ((r = fido_dev_change_pin_tx(dev, pin, oldpin, |
480 | 322 | ms)) != FIDO_OK) { |
481 | 297 | fido_log_debug("%s: fido_dev_change_pin_tx", __func__); |
482 | 297 | return (r); |
483 | 297 | } |
484 | 327 | } else { |
485 | 327 | if ((r = fido_dev_set_pin_tx(dev, pin, ms)) != FIDO_OK) { |
486 | 309 | fido_log_debug("%s: fido_dev_set_pin_tx", __func__); |
487 | 309 | return (r); |
488 | 309 | } |
489 | 327 | } |
490 | | |
491 | 43 | if ((r = fido_rx_cbor_status(dev, ms)) != FIDO_OK) { |
492 | 39 | fido_log_debug("%s: fido_rx_cbor_status", __func__); |
493 | 39 | return (r); |
494 | 39 | } |
495 | | |
496 | 4 | if (dev->flags & FIDO_DEV_PIN_UNSET) { |
497 | 3 | dev->flags &= ~FIDO_DEV_PIN_UNSET; |
498 | 3 | dev->flags |= FIDO_DEV_PIN_SET; |
499 | 3 | } |
500 | | |
501 | 4 | return (FIDO_OK); |
502 | 43 | } |
503 | | |
504 | | int |
505 | | fido_dev_set_pin(fido_dev_t *dev, const char *pin, const char *oldpin) |
506 | 649 | { |
507 | 649 | int ms = dev->timeout_ms; |
508 | | |
509 | 649 | return (fido_dev_set_pin_wait(dev, pin, oldpin, &ms)); |
510 | 649 | } |
511 | | |
512 | | static int |
513 | | parse_retry_count(const uint8_t keyval, const cbor_item_t *key, |
514 | | const cbor_item_t *val, void *arg) |
515 | 544 | { |
516 | 544 | int *retries = arg; |
517 | 544 | uint64_t n; |
518 | | |
519 | 544 | if (cbor_isa_uint(key) == false || |
520 | 544 | cbor_int_get_width(key) != CBOR_INT_8 || |
521 | 544 | cbor_get_uint8(key) != keyval) { |
522 | 448 | fido_log_debug("%s: cbor type", __func__); |
523 | 448 | return (0); /* ignore */ |
524 | 448 | } |
525 | | |
526 | 96 | if (cbor_decode_uint64(val, &n) < 0 || n > INT_MAX) { |
527 | 56 | fido_log_debug("%s: cbor_decode_uint64", __func__); |
528 | 56 | return (-1); |
529 | 56 | } |
530 | | |
531 | 40 | *retries = (int)n; |
532 | | |
533 | 40 | return (0); |
534 | 96 | } |
535 | | |
536 | | static int |
537 | | parse_pin_retry_count(const cbor_item_t *key, const cbor_item_t *val, void *arg) |
538 | 298 | { |
539 | 298 | return (parse_retry_count(3, key, val, arg)); |
540 | 298 | } |
541 | | |
542 | | static int |
543 | | parse_uv_retry_count(const cbor_item_t *key, const cbor_item_t *val, void *arg) |
544 | 246 | { |
545 | 246 | return (parse_retry_count(5, key, val, arg)); |
546 | 246 | } |
547 | | |
548 | | static int |
549 | | fido_dev_get_retry_count_tx(fido_dev_t *dev, uint8_t subcmd, int *ms) |
550 | 1.30k | { |
551 | 1.30k | fido_blob_t f; |
552 | 1.30k | cbor_item_t *argv[2]; |
553 | 1.30k | int r; |
554 | | |
555 | 1.30k | memset(&f, 0, sizeof(f)); |
556 | 1.30k | memset(argv, 0, sizeof(argv)); |
557 | | |
558 | 1.30k | if ((argv[0] = cbor_build_uint8(1)) == NULL || |
559 | 1.30k | (argv[1] = cbor_build_uint8(subcmd)) == NULL) { |
560 | 14 | r = FIDO_ERR_INTERNAL; |
561 | 14 | goto fail; |
562 | 14 | } |
563 | | |
564 | 1.29k | if (cbor_build_frame(CTAP_CBOR_CLIENT_PIN, argv, nitems(argv), |
565 | 1.29k | &f) < 0 || fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) { |
566 | 54 | fido_log_debug("%s: fido_tx", __func__); |
567 | 54 | r = FIDO_ERR_TX; |
568 | 54 | goto fail; |
569 | 54 | } |
570 | | |
571 | 1.24k | r = FIDO_OK; |
572 | 1.30k | fail: |
573 | 1.30k | cbor_vector_free(argv, nitems(argv)); |
574 | 1.30k | free(f.ptr); |
575 | | |
576 | 1.30k | return (r); |
577 | 1.24k | } |
578 | | |
579 | | static int |
580 | | fido_dev_get_pin_retry_count_rx(fido_dev_t *dev, int *retries, int *ms) |
581 | 630 | { |
582 | 630 | unsigned char reply[FIDO_MAXMSG]; |
583 | 630 | int reply_len; |
584 | 630 | int r; |
585 | | |
586 | 630 | *retries = 0; |
587 | | |
588 | 630 | if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply), |
589 | 630 | ms)) < 0) { |
590 | 384 | fido_log_debug("%s: fido_rx", __func__); |
591 | 384 | return (FIDO_ERR_RX); |
592 | 384 | } |
593 | | |
594 | 246 | if ((r = cbor_parse_reply(reply, (size_t)reply_len, retries, |
595 | 246 | parse_pin_retry_count)) != FIDO_OK) { |
596 | 201 | fido_log_debug("%s: parse_pin_retry_count", __func__); |
597 | 201 | return (r); |
598 | 201 | } |
599 | | |
600 | 45 | return (FIDO_OK); |
601 | 246 | } |
602 | | |
603 | | static int |
604 | | fido_dev_get_pin_retry_count_wait(fido_dev_t *dev, int *retries, int *ms) |
605 | 663 | { |
606 | 663 | int r; |
607 | | |
608 | 663 | if ((r = fido_dev_get_retry_count_tx(dev, 1, ms)) != FIDO_OK || |
609 | 663 | (r = fido_dev_get_pin_retry_count_rx(dev, retries, ms)) != FIDO_OK) |
610 | 618 | return (r); |
611 | | |
612 | 45 | return (FIDO_OK); |
613 | 663 | } |
614 | | |
615 | | int |
616 | | fido_dev_get_retry_count(fido_dev_t *dev, int *retries) |
617 | 663 | { |
618 | 663 | int ms = dev->timeout_ms; |
619 | | |
620 | 663 | return (fido_dev_get_pin_retry_count_wait(dev, retries, &ms)); |
621 | 663 | } |
622 | | |
623 | | static int |
624 | | fido_dev_get_uv_retry_count_rx(fido_dev_t *dev, int *retries, int *ms) |
625 | 610 | { |
626 | 610 | unsigned char reply[FIDO_MAXMSG]; |
627 | 610 | int reply_len; |
628 | 610 | int r; |
629 | | |
630 | 610 | *retries = 0; |
631 | | |
632 | 610 | if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply), |
633 | 610 | ms)) < 0) { |
634 | 488 | fido_log_debug("%s: fido_rx", __func__); |
635 | 488 | return (FIDO_ERR_RX); |
636 | 488 | } |
637 | | |
638 | 122 | if ((r = cbor_parse_reply(reply, (size_t)reply_len, retries, |
639 | 122 | parse_uv_retry_count)) != FIDO_OK) { |
640 | 110 | fido_log_debug("%s: parse_uv_retry_count", __func__); |
641 | 110 | return (r); |
642 | 110 | } |
643 | | |
644 | 12 | return (FIDO_OK); |
645 | 122 | } |
646 | | |
647 | | static int |
648 | | fido_dev_get_uv_retry_count_wait(fido_dev_t *dev, int *retries, int *ms) |
649 | 645 | { |
650 | 645 | int r; |
651 | | |
652 | 645 | if ((r = fido_dev_get_retry_count_tx(dev, 7, ms)) != FIDO_OK || |
653 | 645 | (r = fido_dev_get_uv_retry_count_rx(dev, retries, ms)) != FIDO_OK) |
654 | 633 | return (r); |
655 | | |
656 | 12 | return (FIDO_OK); |
657 | 645 | } |
658 | | |
659 | | int |
660 | | fido_dev_get_uv_retry_count(fido_dev_t *dev, int *retries) |
661 | 645 | { |
662 | 645 | int ms = dev->timeout_ms; |
663 | | |
664 | 645 | return (fido_dev_get_uv_retry_count_wait(dev, retries, &ms)); |
665 | 645 | } |
666 | | |
667 | | int |
668 | | cbor_add_uv_params(fido_dev_t *dev, uint8_t cmd, const fido_blob_t *hmac_data, |
669 | | const es256_pk_t *pk, const fido_blob_t *ecdh, const char *pin, |
670 | | const char *rpid, cbor_item_t **auth, cbor_item_t **opt, int *ms) |
671 | 2.58k | { |
672 | 2.58k | fido_blob_t *token = NULL; |
673 | 2.58k | int r; |
674 | | |
675 | 2.58k | if ((token = fido_blob_new()) == NULL) { |
676 | 9 | r = FIDO_ERR_INTERNAL; |
677 | 9 | goto fail; |
678 | 9 | } |
679 | | |
680 | 2.57k | if ((r = fido_dev_get_uv_token(dev, cmd, pin, ecdh, pk, rpid, |
681 | 2.57k | token, ms)) != FIDO_OK) { |
682 | 663 | fido_log_debug("%s: fido_dev_get_uv_token", __func__); |
683 | 663 | goto fail; |
684 | 663 | } |
685 | | |
686 | 1.90k | if ((*auth = cbor_encode_pin_auth(dev, token, hmac_data)) == NULL || |
687 | 1.90k | (*opt = cbor_encode_pin_opt(dev)) == NULL) { |
688 | 15 | fido_log_debug("%s: cbor encode", __func__); |
689 | 15 | r = FIDO_ERR_INTERNAL; |
690 | 15 | goto fail; |
691 | 15 | } |
692 | | |
693 | 1.89k | r = FIDO_OK; |
694 | 2.58k | fail: |
695 | 2.58k | fido_blob_free(&token); |
696 | | |
697 | 2.58k | return (r); |
698 | 1.89k | } |