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/ec.h> |
8 | | #include <openssl/ecdsa.h> |
9 | | #include <openssl/evp.h> |
10 | | #include <openssl/sha.h> |
11 | | |
12 | | #include <string.h> |
13 | | #include "fido.h" |
14 | | #include "fido/es256.h" |
15 | | #include "fido/rs256.h" |
16 | | #include "fido/eddsa.h" |
17 | | |
18 | | static int |
19 | | adjust_assert_count(const cbor_item_t *key, const cbor_item_t *val, void *arg) |
20 | 619 | { |
21 | 619 | fido_assert_t *assert = arg; |
22 | 619 | uint64_t n; |
23 | 619 | |
24 | 619 | /* numberOfCredentials; see section 6.2 */ |
25 | 619 | if (cbor_isa_uint(key) == false || |
26 | 619 | cbor_int_get_width(key) != CBOR_INT_8 || |
27 | 619 | cbor_get_uint8(key) != 5) { |
28 | 600 | fido_log_debug("%s: cbor_type", __func__); |
29 | 600 | return (0); /* ignore */ |
30 | 600 | } |
31 | 19 | |
32 | 19 | if (cbor_decode_uint64(val, &n) < 0 || n > SIZE_MAX) { |
33 | 1 | fido_log_debug("%s: cbor_decode_uint64", __func__); |
34 | 1 | return (-1); |
35 | 1 | } |
36 | 18 | |
37 | 18 | if (assert->stmt_len != 0 || assert->stmt_cnt != 1 || |
38 | 18 | (size_t)n < assert->stmt_cnt) { |
39 | 1 | fido_log_debug("%s: stmt_len=%zu, stmt_cnt=%zu, n=%zu", |
40 | 1 | __func__, assert->stmt_len, assert->stmt_cnt, (size_t)n); |
41 | 1 | return (-1); |
42 | 1 | } |
43 | 17 | |
44 | 17 | if (fido_assert_set_count(assert, (size_t)n) != FIDO_OK) { |
45 | 5 | fido_log_debug("%s: fido_assert_set_count", __func__); |
46 | 5 | return (-1); |
47 | 5 | } |
48 | 12 | |
49 | 12 | assert->stmt_len = 0; /* XXX */ |
50 | 12 | |
51 | 12 | return (0); |
52 | 12 | } |
53 | | |
54 | | static int |
55 | | parse_assert_reply(const cbor_item_t *key, const cbor_item_t *val, void *arg) |
56 | 475 | { |
57 | 475 | fido_assert_stmt *stmt = arg; |
58 | 475 | |
59 | 475 | if (cbor_isa_uint(key) == false || |
60 | 475 | cbor_int_get_width(key) != CBOR_INT_8) { |
61 | 59 | fido_log_debug("%s: cbor type", __func__); |
62 | 59 | return (0); /* ignore */ |
63 | 59 | } |
64 | 416 | |
65 | 416 | switch (cbor_get_uint8(key)) { |
66 | 416 | case 1: /* credential id */ |
67 | 173 | return (cbor_decode_cred_id(val, &stmt->id)); |
68 | 416 | case 2: /* authdata */ |
69 | 134 | return (cbor_decode_assert_authdata(val, &stmt->authdata_cbor, |
70 | 134 | &stmt->authdata, &stmt->authdata_ext, |
71 | 134 | &stmt->hmac_secret_enc)); |
72 | 416 | case 3: /* signature */ |
73 | 89 | return (fido_blob_decode(val, &stmt->sig)); |
74 | 416 | case 4: /* user attributes */ |
75 | 4 | return (cbor_decode_user(val, &stmt->user)); |
76 | 416 | default: /* ignore */ |
77 | 16 | fido_log_debug("%s: cbor type", __func__); |
78 | 16 | return (0); |
79 | 416 | } |
80 | 416 | } |
81 | | |
82 | | static int |
83 | | fido_dev_get_assert_tx(fido_dev_t *dev, fido_assert_t *assert, |
84 | | const es256_pk_t *pk, const fido_blob_t *ecdh, const char *pin) |
85 | 600 | { |
86 | 600 | fido_blob_t f; |
87 | 600 | cbor_item_t *argv[7]; |
88 | 600 | int r; |
89 | 600 | |
90 | 600 | memset(argv, 0, sizeof(argv)); |
91 | 600 | memset(&f, 0, sizeof(f)); |
92 | 600 | |
93 | 600 | /* do we have everything we need? */ |
94 | 600 | if (assert->rp_id == NULL || assert->cdh.ptr == NULL) { |
95 | 0 | fido_log_debug("%s: rp_id=%p, cdh.ptr=%p", __func__, |
96 | 0 | (void *)assert->rp_id, (void *)assert->cdh.ptr); |
97 | 0 | r = FIDO_ERR_INVALID_ARGUMENT; |
98 | 0 | goto fail; |
99 | 0 | } |
100 | 600 | |
101 | 600 | if ((argv[0] = cbor_build_string(assert->rp_id)) == NULL || |
102 | 600 | (argv[1] = fido_blob_encode(&assert->cdh)) == NULL) { |
103 | 3 | fido_log_debug("%s: cbor encode", __func__); |
104 | 3 | r = FIDO_ERR_INTERNAL; |
105 | 3 | goto fail; |
106 | 3 | } |
107 | 597 | |
108 | 597 | /* allowed credentials */ |
109 | 597 | if (assert->allow_list.len) { |
110 | 419 | const fido_blob_array_t *cl = &assert->allow_list; |
111 | 419 | if ((argv[2] = cbor_encode_pubkey_list(cl)) == NULL) { |
112 | 36 | fido_log_debug("%s: cbor_encode_pubkey_list", __func__); |
113 | 36 | r = FIDO_ERR_INTERNAL; |
114 | 36 | goto fail; |
115 | 36 | } |
116 | 561 | } |
117 | 561 | |
118 | 561 | /* hmac-secret extension */ |
119 | 561 | if (assert->ext & FIDO_EXT_HMAC_SECRET) |
120 | 561 | if ((argv[3] = cbor_encode_hmac_secret_param(ecdh, pk, |
121 | 57 | &assert->hmac_salt)) == NULL) { |
122 | 19 | fido_log_debug("%s: cbor_encode_hmac_secret_param", |
123 | 19 | __func__); |
124 | 19 | r = FIDO_ERR_INTERNAL; |
125 | 19 | goto fail; |
126 | 19 | } |
127 | 542 | |
128 | 542 | /* options */ |
129 | 542 | if (assert->up != FIDO_OPT_OMIT || assert->uv != FIDO_OPT_OMIT) |
130 | 349 | if ((argv[4] = cbor_encode_assert_options(assert->up, |
131 | 349 | assert->uv)) == NULL) { |
132 | 5 | fido_log_debug("%s: cbor_encode_assert_options", |
133 | 5 | __func__); |
134 | 5 | r = FIDO_ERR_INTERNAL; |
135 | 5 | goto fail; |
136 | 5 | } |
137 | 537 | |
138 | 537 | /* pin authentication */ |
139 | 537 | if (pin) { |
140 | 537 | if (pk == NULL || ecdh == NULL) { |
141 | 0 | fido_log_debug("%s: pin=%p, pk=%p, ecdh=%p", __func__, |
142 | 0 | (const void *)pin, (const void *)pk, |
143 | 0 | (const void *)ecdh); |
144 | 0 | r = FIDO_ERR_INVALID_ARGUMENT; |
145 | 0 | goto fail; |
146 | 0 | } |
147 | 537 | if ((r = cbor_add_pin_params(dev, &assert->cdh, pk, ecdh, pin, |
148 | 537 | &argv[5], &argv[6])) != FIDO_OK) { |
149 | 83 | fido_log_debug("%s: cbor_add_pin_params", __func__); |
150 | 83 | goto fail; |
151 | 83 | } |
152 | 454 | } |
153 | 454 | |
154 | 454 | /* frame and transmit */ |
155 | 454 | if (cbor_build_frame(CTAP_CBOR_ASSERT, argv, nitems(argv), &f) < 0 || |
156 | 454 | fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len) < 0) { |
157 | 90 | fido_log_debug("%s: fido_tx", __func__); |
158 | 90 | r = FIDO_ERR_TX; |
159 | 90 | goto fail; |
160 | 90 | } |
161 | 364 | |
162 | 364 | r = FIDO_OK; |
163 | 600 | fail: |
164 | 600 | cbor_vector_free(argv, nitems(argv)); |
165 | 600 | free(f.ptr); |
166 | 600 | |
167 | 600 | return (r); |
168 | 364 | } |
169 | | |
170 | | static int |
171 | | fido_dev_get_assert_rx(fido_dev_t *dev, fido_assert_t *assert, int ms) |
172 | 364 | { |
173 | 364 | unsigned char reply[FIDO_MAXMSG]; |
174 | 364 | int reply_len; |
175 | 364 | int r; |
176 | 364 | |
177 | 364 | fido_assert_reset_rx(assert); |
178 | 364 | |
179 | 364 | if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply), |
180 | 364 | ms)) < 0) { |
181 | 66 | fido_log_debug("%s: fido_rx", __func__); |
182 | 66 | return (FIDO_ERR_RX); |
183 | 66 | } |
184 | 298 | |
185 | 298 | /* start with room for a single assertion */ |
186 | 298 | if ((assert->stmt = calloc(1, sizeof(fido_assert_stmt))) == NULL) |
187 | 298 | return (FIDO_ERR_INTERNAL); |
188 | 297 | |
189 | 297 | assert->stmt_len = 0; |
190 | 297 | assert->stmt_cnt = 1; |
191 | 297 | |
192 | 297 | /* adjust as needed */ |
193 | 297 | if ((r = cbor_parse_reply(reply, (size_t)reply_len, assert, |
194 | 297 | adjust_assert_count)) != FIDO_OK) { |
195 | 120 | fido_log_debug("%s: adjust_assert_count", __func__); |
196 | 120 | return (r); |
197 | 120 | } |
198 | 177 | |
199 | 177 | /* parse the first assertion */ |
200 | 177 | if ((r = cbor_parse_reply(reply, (size_t)reply_len, |
201 | 177 | &assert->stmt[assert->stmt_len], parse_assert_reply)) != FIDO_OK) { |
202 | 41 | fido_log_debug("%s: parse_assert_reply", __func__); |
203 | 41 | return (r); |
204 | 41 | } |
205 | 136 | |
206 | 136 | assert->stmt_len++; |
207 | 136 | |
208 | 136 | return (FIDO_OK); |
209 | 136 | } |
210 | | |
211 | | static int |
212 | | fido_get_next_assert_tx(fido_dev_t *dev) |
213 | 7 | { |
214 | 7 | const unsigned char cbor[] = { CTAP_CBOR_NEXT_ASSERT }; |
215 | 7 | |
216 | 7 | if (fido_tx(dev, CTAP_CMD_CBOR, cbor, sizeof(cbor)) < 0) { |
217 | 0 | fido_log_debug("%s: fido_tx", __func__); |
218 | 0 | return (FIDO_ERR_TX); |
219 | 0 | } |
220 | 7 | |
221 | 7 | return (FIDO_OK); |
222 | 7 | } |
223 | | |
224 | | static int |
225 | | fido_get_next_assert_rx(fido_dev_t *dev, fido_assert_t *assert, int ms) |
226 | 7 | { |
227 | 7 | unsigned char reply[FIDO_MAXMSG]; |
228 | 7 | int reply_len; |
229 | 7 | int r; |
230 | 7 | |
231 | 7 | if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply), |
232 | 7 | ms)) < 0) { |
233 | 4 | fido_log_debug("%s: fido_rx", __func__); |
234 | 4 | return (FIDO_ERR_RX); |
235 | 4 | } |
236 | 3 | |
237 | 3 | /* sanity check */ |
238 | 3 | if (assert->stmt_len >= assert->stmt_cnt) { |
239 | 0 | fido_log_debug("%s: stmt_len=%zu, stmt_cnt=%zu", __func__, |
240 | 0 | assert->stmt_len, assert->stmt_cnt); |
241 | 0 | return (FIDO_ERR_INTERNAL); |
242 | 0 | } |
243 | 3 | |
244 | 3 | if ((r = cbor_parse_reply(reply, (size_t)reply_len, |
245 | 3 | &assert->stmt[assert->stmt_len], parse_assert_reply)) != FIDO_OK) { |
246 | 3 | fido_log_debug("%s: parse_assert_reply", __func__); |
247 | 3 | return (r); |
248 | 3 | } |
249 | 0 | |
250 | 0 | return (FIDO_OK); |
251 | 0 | } |
252 | | |
253 | | static int |
254 | | fido_dev_get_assert_wait(fido_dev_t *dev, fido_assert_t *assert, |
255 | | const es256_pk_t *pk, const fido_blob_t *ecdh, const char *pin, int ms) |
256 | 600 | { |
257 | 600 | int r; |
258 | 600 | |
259 | 600 | if ((r = fido_dev_get_assert_tx(dev, assert, pk, ecdh, pin)) != FIDO_OK || |
260 | 600 | (r = fido_dev_get_assert_rx(dev, assert, ms)) != FIDO_OK) |
261 | 600 | return (r); |
262 | 136 | |
263 | 136 | while (assert->stmt_len < assert->stmt_cnt) { |
264 | 7 | if ((r = fido_get_next_assert_tx(dev)) != FIDO_OK || |
265 | 7 | (r = fido_get_next_assert_rx(dev, assert, ms)) != FIDO_OK) |
266 | 7 | return (r); |
267 | 0 | assert->stmt_len++; |
268 | 0 | } |
269 | 136 | |
270 | 136 | return (FIDO_OK); |
271 | 136 | } |
272 | | |
273 | | static int |
274 | | decrypt_hmac_secrets(fido_assert_t *assert, const fido_blob_t *key) |
275 | 13 | { |
276 | 26 | for (size_t i = 0; i < assert->stmt_cnt; i++) { |
277 | 13 | fido_assert_stmt *stmt = &assert->stmt[i]; |
278 | 13 | if (stmt->hmac_secret_enc.ptr != NULL) { |
279 | 0 | if (aes256_cbc_dec(key, &stmt->hmac_secret_enc, |
280 | 0 | &stmt->hmac_secret) < 0) { |
281 | 0 | fido_log_debug("%s: aes256_cbc_dec %zu", |
282 | 0 | __func__, i); |
283 | 0 | return (-1); |
284 | 0 | } |
285 | 0 | } |
286 | 13 | } |
287 | 13 | |
288 | 13 | return (0); |
289 | 13 | } |
290 | | |
291 | | int |
292 | | fido_dev_get_assert(fido_dev_t *dev, fido_assert_t *assert, const char *pin) |
293 | 3.37k | { |
294 | 3.37k | fido_blob_t *ecdh = NULL; |
295 | 3.37k | es256_pk_t *pk = NULL; |
296 | 3.37k | int r; |
297 | 3.37k | |
298 | 3.37k | if (assert->rp_id == NULL || assert->cdh.ptr == NULL) { |
299 | 11 | fido_log_debug("%s: rp_id=%p, cdh.ptr=%p", __func__, |
300 | 11 | (void *)assert->rp_id, (void *)assert->cdh.ptr); |
301 | 11 | return (FIDO_ERR_INVALID_ARGUMENT); |
302 | 11 | } |
303 | 3.36k | |
304 | 3.36k | if (fido_dev_is_fido2(dev) == false) { |
305 | 2.25k | if (pin != NULL || assert->ext != 0) |
306 | 1.09k | return (FIDO_ERR_UNSUPPORTED_OPTION); |
307 | 1.16k | return (u2f_authenticate(dev, assert, -1)); |
308 | 1.16k | } |
309 | 1.11k | |
310 | 1.11k | if (pin != NULL || assert->ext != 0) { |
311 | 1.11k | if ((r = fido_do_ecdh(dev, &pk, &ecdh)) != FIDO_OK) { |
312 | 516 | fido_log_debug("%s: fido_do_ecdh", __func__); |
313 | 516 | goto fail; |
314 | 516 | } |
315 | 600 | } |
316 | 600 | |
317 | 600 | r = fido_dev_get_assert_wait(dev, assert, pk, ecdh, pin, -1); |
318 | 600 | if (r == FIDO_OK && assert->ext & FIDO_EXT_HMAC_SECRET) |
319 | 600 | if (decrypt_hmac_secrets(assert, ecdh) < 0) { |
320 | 0 | fido_log_debug("%s: decrypt_hmac_secrets", __func__); |
321 | 0 | r = FIDO_ERR_INTERNAL; |
322 | 0 | goto fail; |
323 | 0 | } |
324 | 1.11k | |
325 | 1.11k | fail: |
326 | 1.11k | es256_pk_free(&pk); |
327 | 1.11k | fido_blob_free(&ecdh); |
328 | 1.11k | |
329 | 1.11k | return (r); |
330 | 600 | } |
331 | | |
332 | | int |
333 | | fido_check_flags(uint8_t flags, fido_opt_t up, fido_opt_t uv) |
334 | 1.34k | { |
335 | 1.34k | fido_log_debug("%s: flags=%02x", __func__, flags); |
336 | 1.34k | fido_log_debug("%s: up=%d, uv=%d", __func__, up, uv); |
337 | 1.34k | |
338 | 1.34k | if (up == FIDO_OPT_TRUE && |
339 | 1.34k | (flags & CTAP_AUTHDATA_USER_PRESENT) == 0) { |
340 | 15 | fido_log_debug("%s: CTAP_AUTHDATA_USER_PRESENT", __func__); |
341 | 15 | return (-1); /* user not present */ |
342 | 15 | } |
343 | 1.33k | |
344 | 1.33k | if (uv == FIDO_OPT_TRUE && |
345 | 1.33k | (flags & CTAP_AUTHDATA_USER_VERIFIED) == 0) { |
346 | 1 | fido_log_debug("%s: CTAP_AUTHDATA_USER_VERIFIED", __func__); |
347 | 1 | return (-1); /* user not verified */ |
348 | 1 | } |
349 | 1.32k | |
350 | 1.32k | return (0); |
351 | 1.32k | } |
352 | | |
353 | | static int |
354 | | check_extensions(int authdata_ext, int ext) |
355 | 958 | { |
356 | 958 | if (authdata_ext != ext) { |
357 | 2 | fido_log_debug("%s: authdata_ext=0x%x != ext=0x%x", __func__, |
358 | 2 | authdata_ext, ext); |
359 | 2 | return (-1); |
360 | 2 | } |
361 | 956 | |
362 | 956 | return (0); |
363 | 956 | } |
364 | | |
365 | | int |
366 | | fido_get_signed_hash(int cose_alg, fido_blob_t *dgst, const fido_blob_t *clientdata, |
367 | | const fido_blob_t *authdata_cbor) |
368 | 957 | { |
369 | 957 | cbor_item_t *item = NULL; |
370 | 957 | unsigned char *authdata_ptr = NULL; |
371 | 957 | size_t authdata_len; |
372 | 957 | struct cbor_load_result cbor; |
373 | 957 | SHA256_CTX ctx; |
374 | 957 | int ok = -1; |
375 | 957 | |
376 | 957 | if ((item = cbor_load(authdata_cbor->ptr, authdata_cbor->len, |
377 | 957 | &cbor)) == NULL || cbor_isa_bytestring(item) == false || |
378 | 957 | cbor_bytestring_is_definite(item) == false) { |
379 | 3 | fido_log_debug("%s: authdata", __func__); |
380 | 3 | goto fail; |
381 | 3 | } |
382 | 954 | |
383 | 954 | authdata_ptr = cbor_bytestring_handle(item); |
384 | 954 | authdata_len = cbor_bytestring_length(item); |
385 | 954 | |
386 | 954 | if (cose_alg != COSE_EDDSA) { |
387 | 919 | if (dgst->len < SHA256_DIGEST_LENGTH || SHA256_Init(&ctx) == 0 || |
388 | 919 | SHA256_Update(&ctx, authdata_ptr, authdata_len) == 0 || |
389 | 919 | SHA256_Update(&ctx, clientdata->ptr, clientdata->len) == 0 || |
390 | 919 | SHA256_Final(dgst->ptr, &ctx) == 0) { |
391 | 9 | fido_log_debug("%s: sha256", __func__); |
392 | 9 | goto fail; |
393 | 9 | } |
394 | 910 | dgst->len = SHA256_DIGEST_LENGTH; |
395 | 910 | } else { |
396 | 35 | if (SIZE_MAX - authdata_len < clientdata->len || |
397 | 35 | dgst->len < authdata_len + clientdata->len) { |
398 | 4 | fido_log_debug("%s: memcpy", __func__); |
399 | 4 | goto fail; |
400 | 4 | } |
401 | 31 | memcpy(dgst->ptr, authdata_ptr, authdata_len); |
402 | 31 | memcpy(dgst->ptr + authdata_len, clientdata->ptr, |
403 | 31 | clientdata->len); |
404 | 31 | dgst->len = authdata_len + clientdata->len; |
405 | 31 | } |
406 | 954 | |
407 | 954 | ok = 0; |
408 | 957 | fail: |
409 | 957 | if (item != NULL) |
410 | 957 | cbor_decref(&item); |
411 | 957 | |
412 | 957 | return (ok); |
413 | 941 | } |
414 | | |
415 | | int |
416 | | fido_verify_sig_es256(const fido_blob_t *dgst, const es256_pk_t *pk, |
417 | | const fido_blob_t *sig) |
418 | 403 | { |
419 | 403 | EVP_PKEY *pkey = NULL; |
420 | 403 | EC_KEY *ec = NULL; |
421 | 403 | int ok = -1; |
422 | 403 | |
423 | 403 | /* ECDSA_verify needs ints */ |
424 | 403 | if (dgst->len > INT_MAX || sig->len > INT_MAX) { |
425 | 0 | fido_log_debug("%s: dgst->len=%zu, sig->len=%zu", __func__, |
426 | 0 | dgst->len, sig->len); |
427 | 0 | return (-1); |
428 | 0 | } |
429 | 403 | |
430 | 403 | if ((pkey = es256_pk_to_EVP_PKEY(pk)) == NULL || |
431 | 403 | (ec = EVP_PKEY_get0_EC_KEY(pkey)) == NULL) { |
432 | 307 | fido_log_debug("%s: pk -> ec", __func__); |
433 | 307 | goto fail; |
434 | 307 | } |
435 | 96 | |
436 | 96 | if (ECDSA_verify(0, dgst->ptr, (int)dgst->len, sig->ptr, |
437 | 96 | (int)sig->len, ec) != 1) { |
438 | 96 | fido_log_debug("%s: ECDSA_verify", __func__); |
439 | 96 | goto fail; |
440 | 96 | } |
441 | 0 | |
442 | 0 | ok = 0; |
443 | 403 | fail: |
444 | 403 | if (pkey != NULL) |
445 | 403 | EVP_PKEY_free(pkey); |
446 | 403 | |
447 | 403 | return (ok); |
448 | 0 | } |
449 | | |
450 | | int |
451 | | fido_verify_sig_rs256(const fido_blob_t *dgst, const rs256_pk_t *pk, |
452 | | const fido_blob_t *sig) |
453 | 473 | { |
454 | 473 | EVP_PKEY *pkey = NULL; |
455 | 473 | RSA *rsa = NULL; |
456 | 473 | int ok = -1; |
457 | 473 | |
458 | 473 | /* RSA_verify needs unsigned ints */ |
459 | 473 | if (dgst->len > UINT_MAX || sig->len > UINT_MAX) { |
460 | 0 | fido_log_debug("%s: dgst->len=%zu, sig->len=%zu", __func__, |
461 | 0 | dgst->len, sig->len); |
462 | 0 | return (-1); |
463 | 0 | } |
464 | 473 | |
465 | 473 | if ((pkey = rs256_pk_to_EVP_PKEY(pk)) == NULL || |
466 | 473 | (rsa = EVP_PKEY_get0_RSA(pkey)) == NULL) { |
467 | 10 | fido_log_debug("%s: pk -> ec", __func__); |
468 | 10 | goto fail; |
469 | 10 | } |
470 | 463 | |
471 | 463 | if (RSA_verify(NID_sha256, dgst->ptr, (unsigned int)dgst->len, sig->ptr, |
472 | 463 | (unsigned int)sig->len, rsa) != 1) { |
473 | 463 | fido_log_debug("%s: RSA_verify", __func__); |
474 | 463 | goto fail; |
475 | 463 | } |
476 | 0 | |
477 | 0 | ok = 0; |
478 | 473 | fail: |
479 | 473 | if (pkey != NULL) |
480 | 473 | EVP_PKEY_free(pkey); |
481 | 473 | |
482 | 473 | return (ok); |
483 | 0 | } |
484 | | |
485 | | int |
486 | | fido_verify_sig_eddsa(const fido_blob_t *dgst, const eddsa_pk_t *pk, |
487 | | const fido_blob_t *sig) |
488 | 31 | { |
489 | 31 | EVP_PKEY *pkey = NULL; |
490 | 31 | EVP_MD_CTX *mdctx = NULL; |
491 | 31 | int ok = -1; |
492 | 31 | |
493 | 31 | /* EVP_DigestVerify needs ints */ |
494 | 31 | if (dgst->len > INT_MAX || sig->len > INT_MAX) { |
495 | 0 | fido_log_debug("%s: dgst->len=%zu, sig->len=%zu", __func__, |
496 | 0 | dgst->len, sig->len); |
497 | 0 | return (-1); |
498 | 0 | } |
499 | 31 | |
500 | 31 | if ((pkey = eddsa_pk_to_EVP_PKEY(pk)) == NULL) { |
501 | 2 | fido_log_debug("%s: pk -> pkey", __func__); |
502 | 2 | goto fail; |
503 | 2 | } |
504 | 29 | |
505 | 29 | if ((mdctx = EVP_MD_CTX_new()) == NULL) { |
506 | 0 | fido_log_debug("%s: EVP_MD_CTX_new", __func__); |
507 | 0 | goto fail; |
508 | 0 | } |
509 | 29 | |
510 | 29 | if (EVP_DigestVerifyInit(mdctx, NULL, NULL, NULL, pkey) != 1) { |
511 | 0 | fido_log_debug("%s: EVP_DigestVerifyInit", __func__); |
512 | 0 | goto fail; |
513 | 0 | } |
514 | 29 | |
515 | 29 | if (EVP_DigestVerify(mdctx, sig->ptr, sig->len, dgst->ptr, |
516 | 29 | dgst->len) != 1) { |
517 | 29 | fido_log_debug("%s: EVP_DigestVerify", __func__); |
518 | 29 | goto fail; |
519 | 29 | } |
520 | 0 | |
521 | 0 | ok = 0; |
522 | 31 | fail: |
523 | 31 | if (mdctx != NULL) |
524 | 31 | EVP_MD_CTX_free(mdctx); |
525 | 31 | |
526 | 31 | if (pkey != NULL) |
527 | 31 | EVP_PKEY_free(pkey); |
528 | 31 | |
529 | 31 | return (ok); |
530 | 0 | } |
531 | | |
532 | | int |
533 | | fido_assert_verify(const fido_assert_t *assert, size_t idx, int cose_alg, |
534 | | const void *pk) |
535 | 122k | { |
536 | 122k | unsigned char buf[1024]; /* XXX */ |
537 | 122k | fido_blob_t dgst; |
538 | 122k | const fido_assert_stmt *stmt = NULL; |
539 | 122k | int ok = -1; |
540 | 122k | int r; |
541 | 122k | |
542 | 122k | dgst.ptr = buf; |
543 | 122k | dgst.len = sizeof(buf); |
544 | 122k | |
545 | 122k | if (idx >= assert->stmt_len || pk == NULL) { |
546 | 324 | r = FIDO_ERR_INVALID_ARGUMENT; |
547 | 324 | goto out; |
548 | 324 | } |
549 | 122k | |
550 | 122k | stmt = &assert->stmt[idx]; |
551 | 122k | |
552 | 122k | /* do we have everything we need? */ |
553 | 122k | if (assert->cdh.ptr == NULL || assert->rp_id == NULL || |
554 | 122k | stmt->authdata_cbor.ptr == NULL || stmt->sig.ptr == NULL) { |
555 | 121k | fido_log_debug("%s: cdh=%p, rp_id=%s, authdata=%p, sig=%p", |
556 | 121k | __func__, (void *)assert->cdh.ptr, assert->rp_id, |
557 | 121k | (void *)stmt->authdata_cbor.ptr, (void *)stmt->sig.ptr); |
558 | 121k | r = FIDO_ERR_INVALID_ARGUMENT; |
559 | 121k | goto out; |
560 | 121k | } |
561 | 974 | |
562 | 974 | if (fido_check_flags(stmt->authdata.flags, assert->up, |
563 | 974 | assert->uv) < 0) { |
564 | 16 | fido_log_debug("%s: fido_check_flags", __func__); |
565 | 16 | r = FIDO_ERR_INVALID_PARAM; |
566 | 16 | goto out; |
567 | 16 | } |
568 | 958 | |
569 | 958 | if (check_extensions(stmt->authdata_ext, assert->ext) < 0) { |
570 | 2 | fido_log_debug("%s: check_extensions", __func__); |
571 | 2 | r = FIDO_ERR_INVALID_PARAM; |
572 | 2 | goto out; |
573 | 2 | } |
574 | 956 | |
575 | 956 | if (fido_check_rp_id(assert->rp_id, stmt->authdata.rp_id_hash) != 0) { |
576 | 35 | fido_log_debug("%s: fido_check_rp_id", __func__); |
577 | 35 | r = FIDO_ERR_INVALID_PARAM; |
578 | 35 | goto out; |
579 | 35 | } |
580 | 921 | |
581 | 921 | if (fido_get_signed_hash(cose_alg, &dgst, &assert->cdh, |
582 | 921 | &stmt->authdata_cbor) < 0) { |
583 | 16 | fido_log_debug("%s: fido_get_signed_hash", __func__); |
584 | 16 | r = FIDO_ERR_INTERNAL; |
585 | 16 | goto out; |
586 | 16 | } |
587 | 905 | |
588 | 905 | switch (cose_alg) { |
589 | 905 | case COSE_ES256: |
590 | 401 | ok = fido_verify_sig_es256(&dgst, pk, &stmt->sig); |
591 | 401 | break; |
592 | 905 | case COSE_RS256: |
593 | 473 | ok = fido_verify_sig_rs256(&dgst, pk, &stmt->sig); |
594 | 473 | break; |
595 | 905 | case COSE_EDDSA: |
596 | 31 | ok = fido_verify_sig_eddsa(&dgst, pk, &stmt->sig); |
597 | 31 | break; |
598 | 905 | default: |
599 | 0 | fido_log_debug("%s: unsupported cose_alg %d", __func__, |
600 | 0 | cose_alg); |
601 | 0 | r = FIDO_ERR_UNSUPPORTED_OPTION; |
602 | 0 | goto out; |
603 | 905 | } |
604 | 905 | |
605 | 905 | if (ok < 0) |
606 | 905 | r = FIDO_ERR_INVALID_SIG; |
607 | 905 | else |
608 | 905 | r = FIDO_OK; |
609 | 122k | out: |
610 | 122k | explicit_bzero(buf, sizeof(buf)); |
611 | 122k | |
612 | 122k | return (r); |
613 | 905 | } |
614 | | |
615 | | int |
616 | | fido_assert_set_clientdata_hash(fido_assert_t *assert, |
617 | | const unsigned char *hash, size_t hash_len) |
618 | 126k | { |
619 | 126k | if (fido_blob_set(&assert->cdh, hash, hash_len) < 0) |
620 | 461 | return (FIDO_ERR_INVALID_ARGUMENT); |
621 | 125k | |
622 | 125k | return (FIDO_OK); |
623 | 125k | } |
624 | | |
625 | | int |
626 | | fido_assert_set_hmac_salt(fido_assert_t *assert, const unsigned char *salt, |
627 | | size_t salt_len) |
628 | 3.37k | { |
629 | 3.37k | if ((salt_len != 32 && salt_len != 64) || |
630 | 3.37k | fido_blob_set(&assert->hmac_salt, salt, salt_len) < 0) |
631 | 3.24k | return (FIDO_ERR_INVALID_ARGUMENT); |
632 | 139 | |
633 | 139 | return (FIDO_OK); |
634 | 139 | } |
635 | | |
636 | | int |
637 | | fido_assert_set_rp(fido_assert_t *assert, const char *id) |
638 | 126k | { |
639 | 126k | if (assert->rp_id != NULL) { |
640 | 0 | free(assert->rp_id); |
641 | 0 | assert->rp_id = NULL; |
642 | 0 | } |
643 | 126k | |
644 | 126k | if (id == NULL) |
645 | 126k | return (FIDO_ERR_INVALID_ARGUMENT); |
646 | 126k | |
647 | 126k | if ((assert->rp_id = strdup(id)) == NULL) |
648 | 126k | return (FIDO_ERR_INTERNAL); |
649 | 125k | |
650 | 125k | return (FIDO_OK); |
651 | 125k | } |
652 | | |
653 | | int |
654 | | fido_assert_allow_cred(fido_assert_t *assert, const unsigned char *ptr, |
655 | | size_t len) |
656 | 289k | { |
657 | 289k | fido_blob_t id; |
658 | 289k | fido_blob_t *list_ptr; |
659 | 289k | int r; |
660 | 289k | |
661 | 289k | memset(&id, 0, sizeof(id)); |
662 | 289k | |
663 | 289k | if (assert->allow_list.len == SIZE_MAX) { |
664 | 0 | r = FIDO_ERR_INVALID_ARGUMENT; |
665 | 0 | goto fail; |
666 | 0 | } |
667 | 289k | |
668 | 289k | if (fido_blob_set(&id, ptr, len) < 0 || (list_ptr = |
669 | 288k | recallocarray(assert->allow_list.ptr, assert->allow_list.len, |
670 | 288k | assert->allow_list.len + 1, sizeof(fido_blob_t))) == NULL) { |
671 | 1.41k | r = FIDO_ERR_INVALID_ARGUMENT; |
672 | 1.41k | goto fail; |
673 | 1.41k | } |
674 | 288k | |
675 | 288k | list_ptr[assert->allow_list.len++] = id; |
676 | 288k | assert->allow_list.ptr = list_ptr; |
677 | 288k | |
678 | 288k | return (FIDO_OK); |
679 | 1.41k | fail: |
680 | 1.41k | free(id.ptr); |
681 | 1.41k | |
682 | 1.41k | return (r); |
683 | 288k | |
684 | 288k | } |
685 | | |
686 | | int |
687 | | fido_assert_set_extensions(fido_assert_t *assert, int ext) |
688 | 123k | { |
689 | 123k | if (ext != 0 && ext != FIDO_EXT_HMAC_SECRET) |
690 | 123k | return (FIDO_ERR_INVALID_ARGUMENT); |
691 | 10.6k | |
692 | 10.6k | assert->ext = ext; |
693 | 10.6k | |
694 | 10.6k | return (FIDO_OK); |
695 | 10.6k | } |
696 | | |
697 | | int |
698 | | fido_assert_set_options(fido_assert_t *assert, bool up, bool uv) |
699 | 0 | { |
700 | 0 | assert->up = up ? FIDO_OPT_TRUE : FIDO_OPT_FALSE; |
701 | 0 | assert->uv = uv ? FIDO_OPT_TRUE : FIDO_OPT_FALSE; |
702 | 0 |
|
703 | 0 | return (FIDO_OK); |
704 | 0 | } |
705 | | |
706 | | int |
707 | | fido_assert_set_up(fido_assert_t *assert, fido_opt_t up) |
708 | 56.0k | { |
709 | 56.0k | assert->up = up; |
710 | 56.0k | |
711 | 56.0k | return (FIDO_OK); |
712 | 56.0k | } |
713 | | |
714 | | int |
715 | | fido_assert_set_uv(fido_assert_t *assert, fido_opt_t uv) |
716 | 2.20k | { |
717 | 2.20k | assert->uv = uv; |
718 | 2.20k | |
719 | 2.20k | return (FIDO_OK); |
720 | 2.20k | } |
721 | | |
722 | | const unsigned char * |
723 | | fido_assert_clientdata_hash_ptr(const fido_assert_t *assert) |
724 | 123k | { |
725 | 123k | return (assert->cdh.ptr); |
726 | 123k | } |
727 | | |
728 | | size_t |
729 | | fido_assert_clientdata_hash_len(const fido_assert_t *assert) |
730 | 123k | { |
731 | 123k | return (assert->cdh.len); |
732 | 123k | } |
733 | | |
734 | | fido_assert_t * |
735 | | fido_assert_new(void) |
736 | 126k | { |
737 | 126k | return (calloc(1, sizeof(fido_assert_t))); |
738 | 126k | } |
739 | | |
740 | | void |
741 | | fido_assert_reset_tx(fido_assert_t *assert) |
742 | 126k | { |
743 | 126k | free(assert->rp_id); |
744 | 126k | free(assert->cdh.ptr); |
745 | 126k | free(assert->hmac_salt.ptr); |
746 | 126k | fido_free_blob_array(&assert->allow_list); |
747 | 126k | |
748 | 126k | memset(&assert->cdh, 0, sizeof(assert->cdh)); |
749 | 126k | memset(&assert->hmac_salt, 0, sizeof(assert->hmac_salt)); |
750 | 126k | memset(&assert->allow_list, 0, sizeof(assert->allow_list)); |
751 | 126k | |
752 | 126k | assert->rp_id = NULL; |
753 | 126k | assert->up = FIDO_OPT_OMIT; |
754 | 126k | assert->uv = FIDO_OPT_OMIT; |
755 | 126k | assert->ext = 0; |
756 | 126k | } |
757 | | |
758 | | void |
759 | | fido_assert_reset_rx(fido_assert_t *assert) |
760 | 126k | { |
761 | 369k | for (size_t i = 0; i < assert->stmt_cnt; i++) { |
762 | 242k | free(assert->stmt[i].user.id.ptr); |
763 | 242k | free(assert->stmt[i].user.icon); |
764 | 242k | free(assert->stmt[i].user.name); |
765 | 242k | free(assert->stmt[i].user.display_name); |
766 | 242k | free(assert->stmt[i].id.ptr); |
767 | 242k | if (assert->stmt[i].hmac_secret.ptr != NULL) { |
768 | 0 | explicit_bzero(assert->stmt[i].hmac_secret.ptr, |
769 | 0 | assert->stmt[i].hmac_secret.len); |
770 | 0 | } |
771 | 242k | free(assert->stmt[i].hmac_secret.ptr); |
772 | 242k | free(assert->stmt[i].hmac_secret_enc.ptr); |
773 | 242k | free(assert->stmt[i].authdata_cbor.ptr); |
774 | 242k | free(assert->stmt[i].sig.ptr); |
775 | 242k | memset(&assert->stmt[i], 0, sizeof(assert->stmt[i])); |
776 | 242k | } |
777 | 126k | |
778 | 126k | free(assert->stmt); |
779 | 126k | |
780 | 126k | assert->stmt = NULL; |
781 | 126k | assert->stmt_len = 0; |
782 | 126k | assert->stmt_cnt = 0; |
783 | 126k | } |
784 | | |
785 | | void |
786 | | fido_assert_free(fido_assert_t **assert_p) |
787 | 126k | { |
788 | 126k | fido_assert_t *assert; |
789 | 126k | |
790 | 126k | if (assert_p == NULL || (assert = *assert_p) == NULL) |
791 | 126k | return; |
792 | 126k | |
793 | 126k | fido_assert_reset_tx(assert); |
794 | 126k | fido_assert_reset_rx(assert); |
795 | 126k | |
796 | 126k | free(assert); |
797 | 126k | |
798 | 126k | *assert_p = NULL; |
799 | 126k | } |
800 | | |
801 | | size_t |
802 | | fido_assert_count(const fido_assert_t *assert) |
803 | 126k | { |
804 | 126k | return (assert->stmt_len); |
805 | 126k | } |
806 | | |
807 | | const char * |
808 | | fido_assert_rp_id(const fido_assert_t *assert) |
809 | 123k | { |
810 | 123k | return (assert->rp_id); |
811 | 123k | } |
812 | | |
813 | | uint8_t |
814 | | fido_assert_flags(const fido_assert_t *assert, size_t idx) |
815 | 123k | { |
816 | 123k | if (idx >= assert->stmt_len) |
817 | 3.50k | return (0); |
818 | 119k | |
819 | 119k | return (assert->stmt[idx].authdata.flags); |
820 | 119k | } |
821 | | |
822 | | uint32_t |
823 | | fido_assert_sigcount(const fido_assert_t *assert, size_t idx) |
824 | 123k | { |
825 | 123k | if (idx >= assert->stmt_len) |
826 | 3.50k | return (0); |
827 | 119k | |
828 | 119k | return (assert->stmt[idx].authdata.sigcount); |
829 | 119k | } |
830 | | |
831 | | const unsigned char * |
832 | | fido_assert_authdata_ptr(const fido_assert_t *assert, size_t idx) |
833 | 123k | { |
834 | 123k | if (idx >= assert->stmt_len) |
835 | 3.50k | return (NULL); |
836 | 119k | |
837 | 119k | return (assert->stmt[idx].authdata_cbor.ptr); |
838 | 119k | } |
839 | | |
840 | | size_t |
841 | | fido_assert_authdata_len(const fido_assert_t *assert, size_t idx) |
842 | 123k | { |
843 | 123k | if (idx >= assert->stmt_len) |
844 | 3.50k | return (0); |
845 | 119k | |
846 | 119k | return (assert->stmt[idx].authdata_cbor.len); |
847 | 119k | } |
848 | | |
849 | | const unsigned char * |
850 | | fido_assert_sig_ptr(const fido_assert_t *assert, size_t idx) |
851 | 123k | { |
852 | 123k | if (idx >= assert->stmt_len) |
853 | 3.50k | return (NULL); |
854 | 119k | |
855 | 119k | return (assert->stmt[idx].sig.ptr); |
856 | 119k | } |
857 | | |
858 | | size_t |
859 | | fido_assert_sig_len(const fido_assert_t *assert, size_t idx) |
860 | 123k | { |
861 | 123k | if (idx >= assert->stmt_len) |
862 | 3.50k | return (0); |
863 | 119k | |
864 | 119k | return (assert->stmt[idx].sig.len); |
865 | 119k | } |
866 | | |
867 | | const unsigned char * |
868 | | fido_assert_id_ptr(const fido_assert_t *assert, size_t idx) |
869 | 123k | { |
870 | 123k | if (idx >= assert->stmt_len) |
871 | 3.50k | return (NULL); |
872 | 119k | |
873 | 119k | return (assert->stmt[idx].id.ptr); |
874 | 119k | } |
875 | | |
876 | | size_t |
877 | | fido_assert_id_len(const fido_assert_t *assert, size_t idx) |
878 | 123k | { |
879 | 123k | if (idx >= assert->stmt_len) |
880 | 3.50k | return (0); |
881 | 119k | |
882 | 119k | return (assert->stmt[idx].id.len); |
883 | 119k | } |
884 | | |
885 | | const unsigned char * |
886 | | fido_assert_user_id_ptr(const fido_assert_t *assert, size_t idx) |
887 | 123k | { |
888 | 123k | if (idx >= assert->stmt_len) |
889 | 3.50k | return (NULL); |
890 | 119k | |
891 | 119k | return (assert->stmt[idx].user.id.ptr); |
892 | 119k | } |
893 | | |
894 | | size_t |
895 | | fido_assert_user_id_len(const fido_assert_t *assert, size_t idx) |
896 | 123k | { |
897 | 123k | if (idx >= assert->stmt_len) |
898 | 3.50k | return (0); |
899 | 119k | |
900 | 119k | return (assert->stmt[idx].user.id.len); |
901 | 119k | } |
902 | | |
903 | | const char * |
904 | | fido_assert_user_icon(const fido_assert_t *assert, size_t idx) |
905 | 246k | { |
906 | 246k | if (idx >= assert->stmt_len) |
907 | 7.00k | return (NULL); |
908 | 239k | |
909 | 239k | return (assert->stmt[idx].user.icon); |
910 | 239k | } |
911 | | |
912 | | const char * |
913 | | fido_assert_user_name(const fido_assert_t *assert, size_t idx) |
914 | 246k | { |
915 | 246k | if (idx >= assert->stmt_len) |
916 | 7.00k | return (NULL); |
917 | 239k | |
918 | 239k | return (assert->stmt[idx].user.name); |
919 | 239k | } |
920 | | |
921 | | const char * |
922 | | fido_assert_user_display_name(const fido_assert_t *assert, size_t idx) |
923 | 246k | { |
924 | 246k | if (idx >= assert->stmt_len) |
925 | 7.00k | return (NULL); |
926 | 239k | |
927 | 239k | return (assert->stmt[idx].user.display_name); |
928 | 239k | } |
929 | | |
930 | | const unsigned char * |
931 | | fido_assert_hmac_secret_ptr(const fido_assert_t *assert, size_t idx) |
932 | 123k | { |
933 | 123k | if (idx >= assert->stmt_len) |
934 | 3.50k | return (NULL); |
935 | 119k | |
936 | 119k | return (assert->stmt[idx].hmac_secret.ptr); |
937 | 119k | } |
938 | | |
939 | | size_t |
940 | | fido_assert_hmac_secret_len(const fido_assert_t *assert, size_t idx) |
941 | 123k | { |
942 | 123k | if (idx >= assert->stmt_len) |
943 | 3.50k | return (0); |
944 | 119k | |
945 | 119k | return (assert->stmt[idx].hmac_secret.len); |
946 | 119k | } |
947 | | |
948 | | static void |
949 | | fido_assert_clean_authdata(fido_assert_stmt *as) |
950 | 1.95k | { |
951 | 1.95k | free(as->authdata_cbor.ptr); |
952 | 1.95k | free(as->hmac_secret_enc.ptr); |
953 | 1.95k | |
954 | 1.95k | memset(&as->authdata_ext, 0, sizeof(as->authdata_ext)); |
955 | 1.95k | memset(&as->authdata_cbor, 0, sizeof(as->authdata_cbor)); |
956 | 1.95k | memset(&as->authdata, 0, sizeof(as->authdata)); |
957 | 1.95k | memset(&as->hmac_secret_enc, 0, sizeof(as->hmac_secret_enc)); |
958 | 1.95k | } |
959 | | |
960 | | int |
961 | | fido_assert_set_authdata(fido_assert_t *assert, size_t idx, |
962 | | const unsigned char *ptr, size_t len) |
963 | 123k | { |
964 | 123k | cbor_item_t *item = NULL; |
965 | 123k | fido_assert_stmt *stmt = NULL; |
966 | 123k | struct cbor_load_result cbor; |
967 | 123k | int r; |
968 | 123k | |
969 | 123k | if (idx >= assert->stmt_len || ptr == NULL || len == 0) |
970 | 121k | return (FIDO_ERR_INVALID_ARGUMENT); |
971 | 1.94k | |
972 | 1.94k | stmt = &assert->stmt[idx]; |
973 | 1.94k | fido_assert_clean_authdata(stmt); |
974 | 1.94k | |
975 | 1.94k | if ((item = cbor_load(ptr, len, &cbor)) == NULL) { |
976 | 1 | fido_log_debug("%s: cbor_load", __func__); |
977 | 1 | r = FIDO_ERR_INVALID_ARGUMENT; |
978 | 1 | goto fail; |
979 | 1 | } |
980 | 1.94k | |
981 | 1.94k | if (cbor_decode_assert_authdata(item, &stmt->authdata_cbor, |
982 | 1.94k | &stmt->authdata, &stmt->authdata_ext, &stmt->hmac_secret_enc) < 0) { |
983 | 6 | fido_log_debug("%s: cbor_decode_assert_authdata", __func__); |
984 | 6 | r = FIDO_ERR_INVALID_ARGUMENT; |
985 | 6 | goto fail; |
986 | 6 | } |
987 | 1.93k | |
988 | 1.93k | r = FIDO_OK; |
989 | 1.94k | fail: |
990 | 1.94k | if (item != NULL) |
991 | 1.94k | cbor_decref(&item); |
992 | 1.94k | |
993 | 1.94k | if (r != FIDO_OK) |
994 | 1.94k | fido_assert_clean_authdata(stmt); |
995 | 1.94k | |
996 | 1.94k | return (r); |
997 | 1.93k | } |
998 | | |
999 | | int |
1000 | | fido_assert_set_authdata_raw(fido_assert_t *assert, size_t idx, |
1001 | | const unsigned char *ptr, size_t len) |
1002 | 121k | { |
1003 | 121k | cbor_item_t *item = NULL; |
1004 | 121k | fido_assert_stmt *stmt = NULL; |
1005 | 121k | int r; |
1006 | 121k | |
1007 | 121k | if (idx >= assert->stmt_len || ptr == NULL || len == 0) |
1008 | 121k | return (FIDO_ERR_INVALID_ARGUMENT); |
1009 | 2 | |
1010 | 2 | stmt = &assert->stmt[idx]; |
1011 | 2 | fido_assert_clean_authdata(stmt); |
1012 | 2 | |
1013 | 2 | if ((item = cbor_build_bytestring(ptr, len)) == NULL) { |
1014 | 0 | fido_log_debug("%s: cbor_build_bytestring", __func__); |
1015 | 0 | r = FIDO_ERR_INTERNAL; |
1016 | 0 | goto fail; |
1017 | 0 | } |
1018 | 2 | |
1019 | 2 | if (cbor_decode_assert_authdata(item, &stmt->authdata_cbor, |
1020 | 2 | &stmt->authdata, &stmt->authdata_ext, &stmt->hmac_secret_enc) < 0) { |
1021 | 2 | fido_log_debug("%s: cbor_decode_assert_authdata", __func__); |
1022 | 2 | r = FIDO_ERR_INVALID_ARGUMENT; |
1023 | 2 | goto fail; |
1024 | 2 | } |
1025 | 0 | |
1026 | 0 | r = FIDO_OK; |
1027 | 2 | fail: |
1028 | 2 | if (item != NULL) |
1029 | 2 | cbor_decref(&item); |
1030 | 2 | |
1031 | 2 | if (r != FIDO_OK) |
1032 | 2 | fido_assert_clean_authdata(stmt); |
1033 | 2 | |
1034 | 2 | return (r); |
1035 | 0 | } |
1036 | | |
1037 | | static void |
1038 | | fido_assert_clean_sig(fido_assert_stmt *as) |
1039 | 1.89k | { |
1040 | 1.89k | free(as->sig.ptr); |
1041 | 1.89k | as->sig.ptr = NULL; |
1042 | 1.89k | as->sig.len = 0; |
1043 | 1.89k | } |
1044 | | |
1045 | | int |
1046 | | fido_assert_set_sig(fido_assert_t *a, size_t idx, const unsigned char *ptr, |
1047 | | size_t len) |
1048 | 123k | { |
1049 | 123k | unsigned char *sig; |
1050 | 123k | |
1051 | 123k | if (idx >= a->stmt_len || ptr == NULL || len == 0) |
1052 | 122k | return (FIDO_ERR_INVALID_ARGUMENT); |
1053 | 1.89k | |
1054 | 1.89k | fido_assert_clean_sig(&a->stmt[idx]); |
1055 | 1.89k | |
1056 | 1.89k | if ((sig = malloc(len)) == NULL) |
1057 | 1.89k | return (FIDO_ERR_INTERNAL); |
1058 | 1.89k | |
1059 | 1.89k | memcpy(sig, ptr, len); |
1060 | 1.89k | a->stmt[idx].sig.ptr = sig; |
1061 | 1.89k | a->stmt[idx].sig.len = len; |
1062 | 1.89k | |
1063 | 1.89k | return (FIDO_OK); |
1064 | 1.89k | } |
1065 | | |
1066 | | /* XXX shrinking leaks memory; fortunately that shouldn't happen */ |
1067 | | int |
1068 | | fido_assert_set_count(fido_assert_t *assert, size_t n) |
1069 | 124k | { |
1070 | 124k | void *new_stmt; |
1071 | 124k | |
1072 | 124k | #ifdef FIDO_FUZZ |
1073 | 124k | if (n > UINT8_MAX) { |
1074 | 5 | fido_log_debug("%s: n > UINT8_MAX", __func__); |
1075 | 5 | return (FIDO_ERR_INTERNAL); |
1076 | 5 | } |
1077 | 124k | #endif |
1078 | 124k | |
1079 | 124k | new_stmt = recallocarray(assert->stmt, assert->stmt_cnt, n, |
1080 | 124k | sizeof(fido_assert_stmt)); |
1081 | 124k | if (new_stmt == NULL) |
1082 | 124k | return (FIDO_ERR_INTERNAL); |
1083 | 123k | |
1084 | 123k | assert->stmt = new_stmt; |
1085 | 123k | assert->stmt_cnt = n; |
1086 | 123k | assert->stmt_len = n; |
1087 | 123k | |
1088 | 123k | return (FIDO_OK); |
1089 | 123k | } |