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 <openssl/ecdsa.h> |
8 | | #include <openssl/sha.h> |
9 | | |
10 | | #include "fido.h" |
11 | | #include "fido/es256.h" |
12 | | #include "fido/rs256.h" |
13 | | #include "fido/eddsa.h" |
14 | | |
15 | | static int |
16 | | adjust_assert_count(const cbor_item_t *key, const cbor_item_t *val, void *arg) |
17 | 941 | { |
18 | 941 | fido_assert_t *assert = arg; |
19 | 941 | uint64_t n; |
20 | 941 | |
21 | 941 | /* numberOfCredentials; see section 6.2 */ |
22 | 941 | if (cbor_isa_uint(key) == false || |
23 | 941 | cbor_int_get_width(key) != CBOR_INT_8 || |
24 | 941 | cbor_get_uint8(key) != 5) { |
25 | 797 | fido_log_debug("%s: cbor_type", __func__); |
26 | 797 | return (0); /* ignore */ |
27 | 797 | } |
28 | 144 | |
29 | 144 | if (cbor_decode_uint64(val, &n) < 0 || n > SIZE_MAX) { |
30 | 1 | fido_log_debug("%s: cbor_decode_uint64", __func__); |
31 | 1 | return (-1); |
32 | 1 | } |
33 | 143 | |
34 | 143 | if (assert->stmt_len != 0 || assert->stmt_cnt != 1 || |
35 | 143 | (size_t)n < assert->stmt_cnt) { |
36 | 1 | fido_log_debug("%s: stmt_len=%zu, stmt_cnt=%zu, n=%zu", |
37 | 1 | __func__, assert->stmt_len, assert->stmt_cnt, (size_t)n); |
38 | 1 | return (-1); |
39 | 1 | } |
40 | 142 | |
41 | 142 | if (fido_assert_set_count(assert, (size_t)n) != FIDO_OK) { |
42 | 50 | fido_log_debug("%s: fido_assert_set_count", __func__); |
43 | 50 | return (-1); |
44 | 50 | } |
45 | 92 | |
46 | 92 | assert->stmt_len = 0; /* XXX */ |
47 | 92 | |
48 | 92 | return (0); |
49 | 92 | } |
50 | | |
51 | | static int |
52 | | parse_assert_reply(const cbor_item_t *key, const cbor_item_t *val, void *arg) |
53 | 1.72k | { |
54 | 1.72k | fido_assert_stmt *stmt = arg; |
55 | 1.72k | |
56 | 1.72k | if (cbor_isa_uint(key) == false || |
57 | 1.72k | cbor_int_get_width(key) != CBOR_INT_8) { |
58 | 31 | fido_log_debug("%s: cbor type", __func__); |
59 | 31 | return (0); /* ignore */ |
60 | 31 | } |
61 | 1.69k | |
62 | 1.69k | switch (cbor_get_uint8(key)) { |
63 | 487 | case 1: /* credential id */ |
64 | 487 | return (cbor_decode_cred_id(val, &stmt->id)); |
65 | 416 | case 2: /* authdata */ |
66 | 416 | return (cbor_decode_assert_authdata(val, &stmt->authdata_cbor, |
67 | 416 | &stmt->authdata, &stmt->authdata_ext)); |
68 | 379 | case 3: /* signature */ |
69 | 379 | return (fido_blob_decode(val, &stmt->sig)); |
70 | 319 | case 4: /* user attributes */ |
71 | 319 | return (cbor_decode_user(val, &stmt->user)); |
72 | 1 | case 7: /* large blob key */ |
73 | 1 | return (fido_blob_decode(val, &stmt->largeblob_key)); |
74 | 91 | default: /* ignore */ |
75 | 91 | fido_log_debug("%s: cbor type", __func__); |
76 | 91 | return (0); |
77 | 1.69k | } |
78 | 1.69k | } |
79 | | |
80 | | static int |
81 | | fido_dev_get_assert_tx(fido_dev_t *dev, fido_assert_t *assert, |
82 | | const es256_pk_t *pk, const fido_blob_t *ecdh, const char *pin) |
83 | 568 | { |
84 | 568 | fido_blob_t f; |
85 | 568 | cbor_item_t *argv[7]; |
86 | 568 | const uint8_t cmd = CTAP_CBOR_ASSERT; |
87 | 568 | int r; |
88 | 568 | |
89 | 568 | memset(argv, 0, sizeof(argv)); |
90 | 568 | memset(&f, 0, sizeof(f)); |
91 | 568 | |
92 | 568 | /* do we have everything we need? */ |
93 | 568 | if (assert->rp_id == NULL || assert->cdh.ptr == NULL) { |
94 | 0 | fido_log_debug("%s: rp_id=%p, cdh.ptr=%p", __func__, |
95 | 0 | (void *)assert->rp_id, (void *)assert->cdh.ptr); |
96 | 0 | r = FIDO_ERR_INVALID_ARGUMENT; |
97 | 0 | goto fail; |
98 | 0 | } |
99 | 568 | |
100 | 568 | if ((argv[0] = cbor_build_string(assert->rp_id)) == NULL || |
101 | 568 | (argv[1] = fido_blob_encode(&assert->cdh)) == NULL) { |
102 | 2 | fido_log_debug("%s: cbor encode", __func__); |
103 | 2 | r = FIDO_ERR_INTERNAL; |
104 | 2 | goto fail; |
105 | 2 | } |
106 | 566 | |
107 | 566 | /* allowed credentials */ |
108 | 566 | if (assert->allow_list.len) { |
109 | 352 | const fido_blob_array_t *cl = &assert->allow_list; |
110 | 352 | if ((argv[2] = cbor_encode_pubkey_list(cl)) == NULL) { |
111 | 25 | fido_log_debug("%s: cbor_encode_pubkey_list", __func__); |
112 | 25 | r = FIDO_ERR_INTERNAL; |
113 | 25 | goto fail; |
114 | 25 | } |
115 | 541 | } |
116 | 541 | |
117 | 541 | if (assert->ext.mask) |
118 | 245 | if ((argv[3] = cbor_encode_assert_ext(dev, &assert->ext, ecdh, |
119 | 245 | pk)) == NULL) { |
120 | 31 | fido_log_debug("%s: cbor_encode_assert_ext", __func__); |
121 | 31 | r = FIDO_ERR_INTERNAL; |
122 | 31 | goto fail; |
123 | 31 | } |
124 | 510 | |
125 | 510 | /* options */ |
126 | 510 | if (assert->up != FIDO_OPT_OMIT || assert->uv != FIDO_OPT_OMIT) |
127 | 284 | if ((argv[4] = cbor_encode_assert_opt(assert->up, |
128 | 284 | assert->uv)) == NULL) { |
129 | 3 | fido_log_debug("%s: cbor_encode_assert_opt", __func__); |
130 | 3 | r = FIDO_ERR_INTERNAL; |
131 | 3 | goto fail; |
132 | 3 | } |
133 | 507 | |
134 | 507 | /* user verification */ |
135 | 507 | if (fido_dev_can_get_uv_token(dev, pin, assert->uv)) |
136 | 310 | if ((r = cbor_add_uv_params(dev, cmd, &assert->cdh, pk, ecdh, |
137 | 310 | pin, assert->rp_id, &argv[5], &argv[6])) != FIDO_OK) { |
138 | 102 | fido_log_debug("%s: cbor_add_uv_params", __func__); |
139 | 102 | goto fail; |
140 | 102 | } |
141 | 405 | |
142 | 405 | /* frame and transmit */ |
143 | 405 | if (cbor_build_frame(cmd, argv, nitems(argv), &f) < 0 || |
144 | 405 | fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len) < 0) { |
145 | 50 | fido_log_debug("%s: fido_tx", __func__); |
146 | 50 | r = FIDO_ERR_TX; |
147 | 50 | goto fail; |
148 | 50 | } |
149 | 355 | |
150 | 355 | r = FIDO_OK; |
151 | 568 | fail: |
152 | 568 | cbor_vector_free(argv, nitems(argv)); |
153 | 568 | free(f.ptr); |
154 | 568 | |
155 | 568 | return (r); |
156 | 355 | } |
157 | | |
158 | | static int |
159 | | fido_dev_get_assert_rx(fido_dev_t *dev, fido_assert_t *assert, int ms) |
160 | 355 | { |
161 | 355 | unsigned char reply[FIDO_MAXMSG]; |
162 | 355 | int reply_len; |
163 | 355 | int r; |
164 | 355 | |
165 | 355 | fido_assert_reset_rx(assert); |
166 | 355 | |
167 | 355 | if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply), |
168 | 355 | ms)) < 0) { |
169 | 31 | fido_log_debug("%s: fido_rx", __func__); |
170 | 31 | return (FIDO_ERR_RX); |
171 | 31 | } |
172 | 324 | |
173 | 324 | /* start with room for a single assertion */ |
174 | 324 | if ((assert->stmt = calloc(1, sizeof(fido_assert_stmt))) == NULL) |
175 | 324 | return (FIDO_ERR_INTERNAL); |
176 | 323 | |
177 | 323 | assert->stmt_len = 0; |
178 | 323 | assert->stmt_cnt = 1; |
179 | 323 | |
180 | 323 | /* adjust as needed */ |
181 | 323 | if ((r = cbor_parse_reply(reply, (size_t)reply_len, assert, |
182 | 323 | adjust_assert_count)) != FIDO_OK) { |
183 | 76 | fido_log_debug("%s: adjust_assert_count", __func__); |
184 | 76 | return (r); |
185 | 76 | } |
186 | 247 | |
187 | 247 | /* parse the first assertion */ |
188 | 247 | if ((r = cbor_parse_reply(reply, (size_t)reply_len, |
189 | 247 | &assert->stmt[assert->stmt_len], parse_assert_reply)) != FIDO_OK) { |
190 | 43 | fido_log_debug("%s: parse_assert_reply", __func__); |
191 | 43 | return (r); |
192 | 43 | } |
193 | 204 | |
194 | 204 | assert->stmt_len++; |
195 | 204 | |
196 | 204 | return (FIDO_OK); |
197 | 204 | } |
198 | | |
199 | | static int |
200 | | fido_get_next_assert_tx(fido_dev_t *dev) |
201 | 274 | { |
202 | 274 | const unsigned char cbor[] = { CTAP_CBOR_NEXT_ASSERT }; |
203 | 274 | |
204 | 274 | if (fido_tx(dev, CTAP_CMD_CBOR, cbor, sizeof(cbor)) < 0) { |
205 | 1 | fido_log_debug("%s: fido_tx", __func__); |
206 | 1 | return (FIDO_ERR_TX); |
207 | 1 | } |
208 | 273 | |
209 | 273 | return (FIDO_OK); |
210 | 273 | } |
211 | | |
212 | | static int |
213 | | fido_get_next_assert_rx(fido_dev_t *dev, fido_assert_t *assert, int ms) |
214 | 273 | { |
215 | 273 | unsigned char reply[FIDO_MAXMSG]; |
216 | 273 | int reply_len; |
217 | 273 | int r; |
218 | 273 | |
219 | 273 | if ((reply_len = fido_rx(dev, CTAP_CMD_CBOR, &reply, sizeof(reply), |
220 | 273 | ms)) < 0) { |
221 | 7 | fido_log_debug("%s: fido_rx", __func__); |
222 | 7 | return (FIDO_ERR_RX); |
223 | 7 | } |
224 | 266 | |
225 | 266 | /* sanity check */ |
226 | 266 | if (assert->stmt_len >= assert->stmt_cnt) { |
227 | 0 | fido_log_debug("%s: stmt_len=%zu, stmt_cnt=%zu", __func__, |
228 | 0 | assert->stmt_len, assert->stmt_cnt); |
229 | 0 | return (FIDO_ERR_INTERNAL); |
230 | 0 | } |
231 | 266 | |
232 | 266 | if ((r = cbor_parse_reply(reply, (size_t)reply_len, |
233 | 266 | &assert->stmt[assert->stmt_len], parse_assert_reply)) != FIDO_OK) { |
234 | 27 | fido_log_debug("%s: parse_assert_reply", __func__); |
235 | 27 | return (r); |
236 | 27 | } |
237 | 239 | |
238 | 239 | return (FIDO_OK); |
239 | 239 | } |
240 | | |
241 | | static int |
242 | | fido_dev_get_assert_wait(fido_dev_t *dev, fido_assert_t *assert, |
243 | | const es256_pk_t *pk, const fido_blob_t *ecdh, const char *pin, int ms) |
244 | 568 | { |
245 | 568 | int r; |
246 | 568 | |
247 | 568 | if ((r = fido_dev_get_assert_tx(dev, assert, pk, ecdh, pin)) != FIDO_OK || |
248 | 568 | (r = fido_dev_get_assert_rx(dev, assert, ms)) != FIDO_OK) |
249 | 568 | return (r); |
250 | 204 | |
251 | 443 | while (assert->stmt_len < assert->stmt_cnt) { |
252 | 274 | if ((r = fido_get_next_assert_tx(dev)) != FIDO_OK || |
253 | 274 | (r = fido_get_next_assert_rx(dev, assert, ms)) != FIDO_OK) |
254 | 274 | return (r); |
255 | 239 | assert->stmt_len++; |
256 | 239 | } |
257 | 204 | |
258 | 204 | return (FIDO_OK); |
259 | 204 | } |
260 | | |
261 | | static int |
262 | | decrypt_hmac_secrets(const fido_dev_t *dev, fido_assert_t *assert, |
263 | | const fido_blob_t *key) |
264 | 11 | { |
265 | 22 | for (size_t i = 0; i < assert->stmt_cnt; i++) { |
266 | 12 | fido_assert_stmt *stmt = &assert->stmt[i]; |
267 | 12 | if (stmt->authdata_ext.hmac_secret_enc.ptr != NULL) { |
268 | 7 | if (aes256_cbc_dec(dev, key, |
269 | 7 | &stmt->authdata_ext.hmac_secret_enc, |
270 | 7 | &stmt->hmac_secret) < 0) { |
271 | 1 | fido_log_debug("%s: aes256_cbc_dec %zu", |
272 | 1 | __func__, i); |
273 | 1 | return (-1); |
274 | 1 | } |
275 | 7 | } |
276 | 12 | } |
277 | 11 | |
278 | 11 | return (0); |
279 | 11 | } |
280 | | |
281 | | int |
282 | | fido_dev_get_assert(fido_dev_t *dev, fido_assert_t *assert, const char *pin) |
283 | 1.38k | { |
284 | 1.38k | fido_blob_t *ecdh = NULL; |
285 | 1.38k | es256_pk_t *pk = NULL; |
286 | 1.38k | int r; |
287 | 1.38k | |
288 | 1.38k | if (assert->rp_id == NULL || assert->cdh.ptr == NULL) { |
289 | 2 | fido_log_debug("%s: rp_id=%p, cdh.ptr=%p", __func__, |
290 | 2 | (void *)assert->rp_id, (void *)assert->cdh.ptr); |
291 | 2 | return (FIDO_ERR_INVALID_ARGUMENT); |
292 | 2 | } |
293 | 1.38k | |
294 | 1.38k | if (fido_dev_is_fido2(dev) == false) { |
295 | 648 | if (pin != NULL || assert->ext.mask != 0) |
296 | 211 | return (FIDO_ERR_UNSUPPORTED_OPTION); |
297 | 437 | return (u2f_authenticate(dev, assert, -1)); |
298 | 437 | } |
299 | 737 | |
300 | 737 | if (fido_dev_can_get_uv_token(dev, pin, assert->uv) || |
301 | 737 | (assert->ext.mask & FIDO_EXT_HMAC_SECRET)) { |
302 | 536 | if ((r = fido_do_ecdh(dev, &pk, &ecdh)) != FIDO_OK) { |
303 | 169 | fido_log_debug("%s: fido_do_ecdh", __func__); |
304 | 169 | goto fail; |
305 | 169 | } |
306 | 568 | } |
307 | 568 | |
308 | 568 | r = fido_dev_get_assert_wait(dev, assert, pk, ecdh, pin, -1); |
309 | 568 | if (r == FIDO_OK && (assert->ext.mask & FIDO_EXT_HMAC_SECRET)) |
310 | 11 | if (decrypt_hmac_secrets(dev, assert, ecdh) < 0) { |
311 | 1 | fido_log_debug("%s: decrypt_hmac_secrets", __func__); |
312 | 1 | r = FIDO_ERR_INTERNAL; |
313 | 1 | goto fail; |
314 | 1 | } |
315 | 737 | |
316 | 737 | fail: |
317 | 737 | es256_pk_free(&pk); |
318 | 737 | fido_blob_free(&ecdh); |
319 | 737 | |
320 | 737 | return (r); |
321 | 568 | } |
322 | | |
323 | | int |
324 | | fido_check_flags(uint8_t flags, fido_opt_t up, fido_opt_t uv) |
325 | 529 | { |
326 | 529 | fido_log_debug("%s: flags=%02x", __func__, flags); |
327 | 529 | fido_log_debug("%s: up=%d, uv=%d", __func__, up, uv); |
328 | 529 | |
329 | 529 | if (up == FIDO_OPT_TRUE && |
330 | 529 | (flags & CTAP_AUTHDATA_USER_PRESENT) == 0) { |
331 | 14 | fido_log_debug("%s: CTAP_AUTHDATA_USER_PRESENT", __func__); |
332 | 14 | return (-1); /* user not present */ |
333 | 14 | } |
334 | 515 | |
335 | 515 | if (uv == FIDO_OPT_TRUE && |
336 | 515 | (flags & CTAP_AUTHDATA_USER_VERIFIED) == 0) { |
337 | 11 | fido_log_debug("%s: CTAP_AUTHDATA_USER_VERIFIED", __func__); |
338 | 11 | return (-1); /* user not verified */ |
339 | 11 | } |
340 | 504 | |
341 | 504 | return (0); |
342 | 504 | } |
343 | | |
344 | | static int |
345 | | check_extensions(int authdata_ext, int ext) |
346 | 414 | { |
347 | 414 | /* XXX: largeBlobKey is not part of extensions map */ |
348 | 414 | ext &= ~FIDO_EXT_LARGEBLOB_KEY; |
349 | 414 | if (authdata_ext != ext) { |
350 | 16 | fido_log_debug("%s: authdata_ext=0x%x != ext=0x%x", __func__, |
351 | 16 | authdata_ext, ext); |
352 | 16 | return (-1); |
353 | 16 | } |
354 | 398 | |
355 | 398 | return (0); |
356 | 398 | } |
357 | | |
358 | | int |
359 | | fido_get_signed_hash(int cose_alg, fido_blob_t *dgst, |
360 | | const fido_blob_t *clientdata, const fido_blob_t *authdata_cbor) |
361 | 384 | { |
362 | 384 | cbor_item_t *item = NULL; |
363 | 384 | unsigned char *authdata_ptr = NULL; |
364 | 384 | size_t authdata_len; |
365 | 384 | struct cbor_load_result cbor; |
366 | 384 | SHA256_CTX ctx; |
367 | 384 | int ok = -1; |
368 | 384 | |
369 | 384 | if ((item = cbor_load(authdata_cbor->ptr, authdata_cbor->len, |
370 | 384 | &cbor)) == NULL || cbor_isa_bytestring(item) == false || |
371 | 384 | cbor_bytestring_is_definite(item) == false) { |
372 | 9 | fido_log_debug("%s: authdata", __func__); |
373 | 9 | goto fail; |
374 | 9 | } |
375 | 375 | |
376 | 375 | authdata_ptr = cbor_bytestring_handle(item); |
377 | 375 | authdata_len = cbor_bytestring_length(item); |
378 | 375 | |
379 | 375 | if (cose_alg != COSE_EDDSA) { |
380 | 278 | if (dgst->len < SHA256_DIGEST_LENGTH || SHA256_Init(&ctx) == 0 || |
381 | 278 | SHA256_Update(&ctx, authdata_ptr, authdata_len) == 0 || |
382 | 278 | SHA256_Update(&ctx, clientdata->ptr, clientdata->len) == 0 || |
383 | 278 | SHA256_Final(dgst->ptr, &ctx) == 0) { |
384 | 27 | fido_log_debug("%s: sha256", __func__); |
385 | 27 | goto fail; |
386 | 27 | } |
387 | 251 | dgst->len = SHA256_DIGEST_LENGTH; |
388 | 251 | } else { |
389 | 97 | if (SIZE_MAX - authdata_len < clientdata->len || |
390 | 97 | dgst->len < authdata_len + clientdata->len) { |
391 | 13 | fido_log_debug("%s: memcpy", __func__); |
392 | 13 | goto fail; |
393 | 13 | } |
394 | 84 | memcpy(dgst->ptr, authdata_ptr, authdata_len); |
395 | 84 | memcpy(dgst->ptr + authdata_len, clientdata->ptr, |
396 | 84 | clientdata->len); |
397 | 84 | dgst->len = authdata_len + clientdata->len; |
398 | 84 | } |
399 | 375 | |
400 | 375 | ok = 0; |
401 | 384 | fail: |
402 | 384 | if (item != NULL) |
403 | 384 | cbor_decref(&item); |
404 | 384 | |
405 | 384 | return (ok); |
406 | 335 | } |
407 | | |
408 | | int |
409 | | fido_verify_sig_es256(const fido_blob_t *dgst, const es256_pk_t *pk, |
410 | | const fido_blob_t *sig) |
411 | 127 | { |
412 | 127 | EVP_PKEY *pkey = NULL; |
413 | 127 | EC_KEY *ec = NULL; |
414 | 127 | int ok = -1; |
415 | 127 | |
416 | 127 | /* ECDSA_verify needs ints */ |
417 | 127 | if (dgst->len > INT_MAX || sig->len > INT_MAX) { |
418 | 0 | fido_log_debug("%s: dgst->len=%zu, sig->len=%zu", __func__, |
419 | 0 | dgst->len, sig->len); |
420 | 0 | return (-1); |
421 | 0 | } |
422 | 127 | |
423 | 127 | if ((pkey = es256_pk_to_EVP_PKEY(pk)) == NULL || |
424 | 127 | (ec = EVP_PKEY_get0_EC_KEY(pkey)) == NULL) { |
425 | 80 | fido_log_debug("%s: pk -> ec", __func__); |
426 | 80 | goto fail; |
427 | 80 | } |
428 | 47 | |
429 | 47 | if (ECDSA_verify(0, dgst->ptr, (int)dgst->len, sig->ptr, |
430 | 47 | (int)sig->len, ec) != 1) { |
431 | 47 | fido_log_debug("%s: ECDSA_verify", __func__); |
432 | 47 | goto fail; |
433 | 47 | } |
434 | 0 | |
435 | 0 | ok = 0; |
436 | 127 | fail: |
437 | 127 | if (pkey != NULL) |
438 | 127 | EVP_PKEY_free(pkey); |
439 | 127 | |
440 | 127 | return (ok); |
441 | 0 | } |
442 | | |
443 | | int |
444 | | fido_verify_sig_rs256(const fido_blob_t *dgst, const rs256_pk_t *pk, |
445 | | const fido_blob_t *sig) |
446 | 115 | { |
447 | 115 | EVP_PKEY *pkey = NULL; |
448 | 115 | RSA *rsa = NULL; |
449 | 115 | int ok = -1; |
450 | 115 | |
451 | 115 | /* RSA_verify needs unsigned ints */ |
452 | 115 | if (dgst->len > UINT_MAX || sig->len > UINT_MAX) { |
453 | 0 | fido_log_debug("%s: dgst->len=%zu, sig->len=%zu", __func__, |
454 | 0 | dgst->len, sig->len); |
455 | 0 | return (-1); |
456 | 0 | } |
457 | 115 | |
458 | 115 | if ((pkey = rs256_pk_to_EVP_PKEY(pk)) == NULL || |
459 | 115 | (rsa = EVP_PKEY_get0_RSA(pkey)) == NULL) { |
460 | 41 | fido_log_debug("%s: pk -> ec", __func__); |
461 | 41 | goto fail; |
462 | 41 | } |
463 | 74 | |
464 | 74 | if (RSA_verify(NID_sha256, dgst->ptr, (unsigned int)dgst->len, sig->ptr, |
465 | 74 | (unsigned int)sig->len, rsa) != 1) { |
466 | 74 | fido_log_debug("%s: RSA_verify", __func__); |
467 | 74 | goto fail; |
468 | 74 | } |
469 | 0 | |
470 | 0 | ok = 0; |
471 | 115 | fail: |
472 | 115 | if (pkey != NULL) |
473 | 115 | EVP_PKEY_free(pkey); |
474 | 115 | |
475 | 115 | return (ok); |
476 | 0 | } |
477 | | |
478 | | int |
479 | | fido_verify_sig_eddsa(const fido_blob_t *dgst, const eddsa_pk_t *pk, |
480 | | const fido_blob_t *sig) |
481 | 84 | { |
482 | 84 | EVP_PKEY *pkey = NULL; |
483 | 84 | EVP_MD_CTX *mdctx = NULL; |
484 | 84 | int ok = -1; |
485 | 84 | |
486 | 84 | /* EVP_DigestVerify needs ints */ |
487 | 84 | if (dgst->len > INT_MAX || sig->len > INT_MAX) { |
488 | 0 | fido_log_debug("%s: dgst->len=%zu, sig->len=%zu", __func__, |
489 | 0 | dgst->len, sig->len); |
490 | 0 | return (-1); |
491 | 0 | } |
492 | 84 | |
493 | 84 | if ((pkey = eddsa_pk_to_EVP_PKEY(pk)) == NULL) { |
494 | 4 | fido_log_debug("%s: pk -> pkey", __func__); |
495 | 4 | goto fail; |
496 | 4 | } |
497 | 80 | |
498 | 80 | if ((mdctx = EVP_MD_CTX_new()) == NULL) { |
499 | 4 | fido_log_debug("%s: EVP_MD_CTX_new", __func__); |
500 | 4 | goto fail; |
501 | 4 | } |
502 | 76 | |
503 | 76 | if (EVP_DigestVerifyInit(mdctx, NULL, NULL, NULL, pkey) != 1) { |
504 | 4 | fido_log_debug("%s: EVP_DigestVerifyInit", __func__); |
505 | 4 | goto fail; |
506 | 4 | } |
507 | 72 | |
508 | 72 | if (EVP_DigestVerify(mdctx, sig->ptr, sig->len, dgst->ptr, |
509 | 72 | dgst->len) != 1) { |
510 | 72 | fido_log_debug("%s: EVP_DigestVerify", __func__); |
511 | 72 | goto fail; |
512 | 72 | } |
513 | 0 | |
514 | 0 | ok = 0; |
515 | 84 | fail: |
516 | 84 | if (mdctx != NULL) |
517 | 84 | EVP_MD_CTX_free(mdctx); |
518 | 84 | |
519 | 84 | if (pkey != NULL) |
520 | 84 | EVP_PKEY_free(pkey); |
521 | 84 | |
522 | 84 | return (ok); |
523 | 0 | } |
524 | | |
525 | | int |
526 | | fido_assert_verify(const fido_assert_t *assert, size_t idx, int cose_alg, |
527 | | const void *pk) |
528 | 29.0k | { |
529 | 29.0k | unsigned char buf[1024]; /* XXX */ |
530 | 29.0k | fido_blob_t dgst; |
531 | 29.0k | const fido_assert_stmt *stmt = NULL; |
532 | 29.0k | int ok = -1; |
533 | 29.0k | int r; |
534 | 29.0k | |
535 | 29.0k | dgst.ptr = buf; |
536 | 29.0k | dgst.len = sizeof(buf); |
537 | 29.0k | |
538 | 29.0k | if (idx >= assert->stmt_len || pk == NULL) { |
539 | 100 | r = FIDO_ERR_INVALID_ARGUMENT; |
540 | 100 | goto out; |
541 | 100 | } |
542 | 28.9k | |
543 | 28.9k | stmt = &assert->stmt[idx]; |
544 | 28.9k | |
545 | 28.9k | /* do we have everything we need? */ |
546 | 28.9k | if (assert->cdh.ptr == NULL || assert->rp_id == NULL || |
547 | 28.9k | stmt->authdata_cbor.ptr == NULL || stmt->sig.ptr == NULL) { |
548 | 28.5k | fido_log_debug("%s: cdh=%p, rp_id=%s, authdata=%p, sig=%p", |
549 | 28.5k | __func__, (void *)assert->cdh.ptr, assert->rp_id, |
550 | 28.5k | (void *)stmt->authdata_cbor.ptr, (void *)stmt->sig.ptr); |
551 | 28.5k | r = FIDO_ERR_INVALID_ARGUMENT; |
552 | 28.5k | goto out; |
553 | 28.5k | } |
554 | 436 | |
555 | 436 | if (fido_check_flags(stmt->authdata.flags, assert->up, |
556 | 436 | assert->uv) < 0) { |
557 | 22 | fido_log_debug("%s: fido_check_flags", __func__); |
558 | 22 | r = FIDO_ERR_INVALID_PARAM; |
559 | 22 | goto out; |
560 | 22 | } |
561 | 414 | |
562 | 414 | if (check_extensions(stmt->authdata_ext.mask, assert->ext.mask) < 0) { |
563 | 16 | fido_log_debug("%s: check_extensions", __func__); |
564 | 16 | r = FIDO_ERR_INVALID_PARAM; |
565 | 16 | goto out; |
566 | 16 | } |
567 | 398 | |
568 | 398 | if (fido_check_rp_id(assert->rp_id, stmt->authdata.rp_id_hash) != 0) { |
569 | 77 | fido_log_debug("%s: fido_check_rp_id", __func__); |
570 | 77 | r = FIDO_ERR_INVALID_PARAM; |
571 | 77 | goto out; |
572 | 77 | } |
573 | 321 | |
574 | 321 | if (fido_get_signed_hash(cose_alg, &dgst, &assert->cdh, |
575 | 321 | &stmt->authdata_cbor) < 0) { |
576 | 43 | fido_log_debug("%s: fido_get_signed_hash", __func__); |
577 | 43 | r = FIDO_ERR_INTERNAL; |
578 | 43 | goto out; |
579 | 43 | } |
580 | 278 | |
581 | 278 | switch (cose_alg) { |
582 | 118 | case COSE_ES256: |
583 | 118 | ok = fido_verify_sig_es256(&dgst, pk, &stmt->sig); |
584 | 118 | break; |
585 | 99 | case COSE_RS256: |
586 | 99 | ok = fido_verify_sig_rs256(&dgst, pk, &stmt->sig); |
587 | 99 | break; |
588 | 61 | case COSE_EDDSA: |
589 | 61 | ok = fido_verify_sig_eddsa(&dgst, pk, &stmt->sig); |
590 | 61 | break; |
591 | 0 | default: |
592 | 0 | fido_log_debug("%s: unsupported cose_alg %d", __func__, |
593 | 0 | cose_alg); |
594 | 0 | r = FIDO_ERR_UNSUPPORTED_OPTION; |
595 | 0 | goto out; |
596 | 278 | } |
597 | 278 | |
598 | 278 | if (ok < 0) |
599 | 278 | r = FIDO_ERR_INVALID_SIG; |
600 | 278 | else |
601 | 278 | r = FIDO_OK; |
602 | 29.0k | out: |
603 | 29.0k | explicit_bzero(buf, sizeof(buf)); |
604 | 29.0k | |
605 | 29.0k | return (r); |
606 | 278 | } |
607 | | |
608 | | int |
609 | | fido_assert_set_clientdata_hash(fido_assert_t *assert, |
610 | | const unsigned char *hash, size_t hash_len) |
611 | 31.8k | { |
612 | 31.8k | if (fido_blob_set(&assert->cdh, hash, hash_len) < 0) |
613 | 348 | return (FIDO_ERR_INVALID_ARGUMENT); |
614 | 31.4k | |
615 | 31.4k | return (FIDO_OK); |
616 | 31.4k | } |
617 | | |
618 | | int |
619 | | fido_assert_set_hmac_salt(fido_assert_t *assert, const unsigned char *salt, |
620 | | size_t salt_len) |
621 | 2.77k | { |
622 | 2.77k | if ((salt_len != 32 && salt_len != 64) || |
623 | 2.77k | fido_blob_set(&assert->ext.hmac_salt, salt, salt_len) < 0) |
624 | 2.64k | return (FIDO_ERR_INVALID_ARGUMENT); |
625 | 129 | |
626 | 129 | return (FIDO_OK); |
627 | 129 | } |
628 | | |
629 | | int |
630 | | fido_assert_set_hmac_secret(fido_assert_t *assert, size_t idx, |
631 | | const unsigned char *secret, size_t secret_len) |
632 | 0 | { |
633 | 0 | if (idx >= assert->stmt_len || (secret_len != 32 && secret_len != 64) || |
634 | 0 | fido_blob_set(&assert->stmt[idx].hmac_secret, secret, |
635 | 0 | secret_len) < 0) |
636 | 0 | return (FIDO_ERR_INVALID_ARGUMENT); |
637 | 0 |
|
638 | 0 | return (FIDO_OK); |
639 | 0 | } |
640 | | |
641 | | int |
642 | | fido_assert_set_rp(fido_assert_t *assert, const char *id) |
643 | 31.8k | { |
644 | 31.8k | if (assert->rp_id != NULL) { |
645 | 1.38k | free(assert->rp_id); |
646 | 1.38k | assert->rp_id = NULL; |
647 | 1.38k | } |
648 | 31.8k | |
649 | 31.8k | if (id == NULL) |
650 | 31.8k | return (FIDO_ERR_INVALID_ARGUMENT); |
651 | 31.5k | |
652 | 31.5k | if ((assert->rp_id = strdup(id)) == NULL) |
653 | 31.5k | return (FIDO_ERR_INTERNAL); |
654 | 31.4k | |
655 | 31.4k | return (FIDO_OK); |
656 | 31.4k | } |
657 | | |
658 | | int |
659 | | fido_assert_allow_cred(fido_assert_t *assert, const unsigned char *ptr, |
660 | | size_t len) |
661 | 61.8k | { |
662 | 61.8k | fido_blob_t id; |
663 | 61.8k | fido_blob_t *list_ptr; |
664 | 61.8k | int r; |
665 | 61.8k | |
666 | 61.8k | memset(&id, 0, sizeof(id)); |
667 | 61.8k | |
668 | 61.8k | if (assert->allow_list.len == SIZE_MAX) { |
669 | 0 | r = FIDO_ERR_INVALID_ARGUMENT; |
670 | 0 | goto fail; |
671 | 0 | } |
672 | 61.8k | |
673 | 61.8k | if (fido_blob_set(&id, ptr, len) < 0 || (list_ptr = |
674 | 61.5k | recallocarray(assert->allow_list.ptr, assert->allow_list.len, |
675 | 61.5k | assert->allow_list.len + 1, sizeof(fido_blob_t))) == NULL) { |
676 | 410 | r = FIDO_ERR_INVALID_ARGUMENT; |
677 | 410 | goto fail; |
678 | 410 | } |
679 | 61.3k | |
680 | 61.3k | list_ptr[assert->allow_list.len++] = id; |
681 | 61.3k | assert->allow_list.ptr = list_ptr; |
682 | 61.3k | |
683 | 61.3k | return (FIDO_OK); |
684 | 410 | fail: |
685 | 410 | free(id.ptr); |
686 | 410 | |
687 | 410 | return (r); |
688 | 61.3k | |
689 | 61.3k | } |
690 | | |
691 | | int |
692 | | fido_assert_set_extensions(fido_assert_t *assert, int ext) |
693 | 29.9k | { |
694 | 29.9k | if (ext == 0) |
695 | 3.06k | assert->ext.mask = 0; |
696 | 26.8k | else { |
697 | 26.8k | if ((ext & FIDO_EXT_ASSERT_MASK) != ext) |
698 | 25.9k | return (FIDO_ERR_INVALID_ARGUMENT); |
699 | 936 | assert->ext.mask |= ext; |
700 | 936 | } |
701 | 29.9k | |
702 | 29.9k | return (FIDO_OK); |
703 | 29.9k | } |
704 | | |
705 | | int |
706 | | fido_assert_set_options(fido_assert_t *assert, bool up, bool uv) |
707 | 0 | { |
708 | 0 | assert->up = up ? FIDO_OPT_TRUE : FIDO_OPT_FALSE; |
709 | 0 | assert->uv = uv ? FIDO_OPT_TRUE : FIDO_OPT_FALSE; |
710 | 0 |
|
711 | 0 | return (FIDO_OK); |
712 | 0 | } |
713 | | |
714 | | int |
715 | | fido_assert_set_up(fido_assert_t *assert, fido_opt_t up) |
716 | 15.0k | { |
717 | 15.0k | assert->up = up; |
718 | 15.0k | |
719 | 15.0k | return (FIDO_OK); |
720 | 15.0k | } |
721 | | |
722 | | int |
723 | | fido_assert_set_uv(fido_assert_t *assert, fido_opt_t uv) |
724 | 747 | { |
725 | 747 | assert->uv = uv; |
726 | 747 | |
727 | 747 | return (FIDO_OK); |
728 | 747 | } |
729 | | |
730 | | const unsigned char * |
731 | | fido_assert_clientdata_hash_ptr(const fido_assert_t *assert) |
732 | 29.1k | { |
733 | 29.1k | return (assert->cdh.ptr); |
734 | 29.1k | } |
735 | | |
736 | | size_t |
737 | | fido_assert_clientdata_hash_len(const fido_assert_t *assert) |
738 | 29.1k | { |
739 | 29.1k | return (assert->cdh.len); |
740 | 29.1k | } |
741 | | |
742 | | fido_assert_t * |
743 | | fido_assert_new(void) |
744 | 30.7k | { |
745 | 30.7k | return (calloc(1, sizeof(fido_assert_t))); |
746 | 30.7k | } |
747 | | |
748 | | void |
749 | | fido_assert_reset_tx(fido_assert_t *assert) |
750 | 30.6k | { |
751 | 30.6k | free(assert->rp_id); |
752 | 30.6k | fido_blob_reset(&assert->cdh); |
753 | 30.6k | fido_blob_reset(&assert->ext.hmac_salt); |
754 | 30.6k | fido_free_blob_array(&assert->allow_list); |
755 | 30.6k | memset(&assert->ext, 0, sizeof(assert->ext)); |
756 | 30.6k | memset(&assert->allow_list, 0, sizeof(assert->allow_list)); |
757 | 30.6k | assert->rp_id = NULL; |
758 | 30.6k | assert->up = FIDO_OPT_OMIT; |
759 | 30.6k | assert->uv = FIDO_OPT_OMIT; |
760 | 30.6k | } |
761 | | |
762 | | static void fido_assert_reset_extattr(fido_assert_extattr_t *ext) |
763 | 59.1k | { |
764 | 59.1k | fido_blob_reset(&ext->hmac_secret_enc); |
765 | 59.1k | fido_blob_reset(&ext->blob); |
766 | 59.1k | memset(ext, 0, sizeof(*ext)); |
767 | 59.1k | } |
768 | | |
769 | | void |
770 | | fido_assert_reset_rx(fido_assert_t *assert) |
771 | 31.0k | { |
772 | 88.9k | for (size_t i = 0; i < assert->stmt_cnt; i++) { |
773 | 57.9k | free(assert->stmt[i].user.icon); |
774 | 57.9k | free(assert->stmt[i].user.name); |
775 | 57.9k | free(assert->stmt[i].user.display_name); |
776 | 57.9k | fido_blob_reset(&assert->stmt[i].user.id); |
777 | 57.9k | fido_blob_reset(&assert->stmt[i].id); |
778 | 57.9k | fido_blob_reset(&assert->stmt[i].hmac_secret); |
779 | 57.9k | fido_blob_reset(&assert->stmt[i].authdata_cbor); |
780 | 57.9k | fido_blob_reset(&assert->stmt[i].largeblob_key); |
781 | 57.9k | fido_blob_reset(&assert->stmt[i].sig); |
782 | 57.9k | fido_assert_reset_extattr(&assert->stmt[i].authdata_ext); |
783 | 57.9k | memset(&assert->stmt[i], 0, sizeof(assert->stmt[i])); |
784 | 57.9k | } |
785 | 31.0k | free(assert->stmt); |
786 | 31.0k | assert->stmt = NULL; |
787 | 31.0k | assert->stmt_len = 0; |
788 | 31.0k | assert->stmt_cnt = 0; |
789 | 31.0k | } |
790 | | |
791 | | void |
792 | | fido_assert_free(fido_assert_t **assert_p) |
793 | 30.6k | { |
794 | 30.6k | fido_assert_t *assert; |
795 | 30.6k | |
796 | 30.6k | if (assert_p == NULL || (assert = *assert_p) == NULL) |
797 | 30.6k | return; |
798 | 30.6k | fido_assert_reset_tx(assert); |
799 | 30.6k | fido_assert_reset_rx(assert); |
800 | 30.6k | free(assert); |
801 | 30.6k | *assert_p = NULL; |
802 | 30.6k | } |
803 | | |
804 | | size_t |
805 | | fido_assert_count(const fido_assert_t *assert) |
806 | 30.7k | { |
807 | 30.7k | return (assert->stmt_len); |
808 | 30.7k | } |
809 | | |
810 | | const char * |
811 | | fido_assert_rp_id(const fido_assert_t *assert) |
812 | 29.1k | { |
813 | 29.1k | return (assert->rp_id); |
814 | 29.1k | } |
815 | | |
816 | | uint8_t |
817 | | fido_assert_flags(const fido_assert_t *assert, size_t idx) |
818 | 29.1k | { |
819 | 29.1k | if (idx >= assert->stmt_len) |
820 | 1.62k | return (0); |
821 | 27.5k | |
822 | 27.5k | return (assert->stmt[idx].authdata.flags); |
823 | 27.5k | } |
824 | | |
825 | | uint32_t |
826 | | fido_assert_sigcount(const fido_assert_t *assert, size_t idx) |
827 | 29.1k | { |
828 | 29.1k | if (idx >= assert->stmt_len) |
829 | 1.62k | return (0); |
830 | 27.5k | |
831 | 27.5k | return (assert->stmt[idx].authdata.sigcount); |
832 | 27.5k | } |
833 | | |
834 | | const unsigned char * |
835 | | fido_assert_authdata_ptr(const fido_assert_t *assert, size_t idx) |
836 | 29.1k | { |
837 | 29.1k | if (idx >= assert->stmt_len) |
838 | 1.62k | return (NULL); |
839 | 27.5k | |
840 | 27.5k | return (assert->stmt[idx].authdata_cbor.ptr); |
841 | 27.5k | } |
842 | | |
843 | | size_t |
844 | | fido_assert_authdata_len(const fido_assert_t *assert, size_t idx) |
845 | 29.1k | { |
846 | 29.1k | if (idx >= assert->stmt_len) |
847 | 1.62k | return (0); |
848 | 27.5k | |
849 | 27.5k | return (assert->stmt[idx].authdata_cbor.len); |
850 | 27.5k | } |
851 | | |
852 | | const unsigned char * |
853 | | fido_assert_sig_ptr(const fido_assert_t *assert, size_t idx) |
854 | 29.1k | { |
855 | 29.1k | if (idx >= assert->stmt_len) |
856 | 1.62k | return (NULL); |
857 | 27.5k | |
858 | 27.5k | return (assert->stmt[idx].sig.ptr); |
859 | 27.5k | } |
860 | | |
861 | | size_t |
862 | | fido_assert_sig_len(const fido_assert_t *assert, size_t idx) |
863 | 29.1k | { |
864 | 29.1k | if (idx >= assert->stmt_len) |
865 | 1.62k | return (0); |
866 | 27.5k | |
867 | 27.5k | return (assert->stmt[idx].sig.len); |
868 | 27.5k | } |
869 | | |
870 | | const unsigned char * |
871 | | fido_assert_id_ptr(const fido_assert_t *assert, size_t idx) |
872 | 29.1k | { |
873 | 29.1k | if (idx >= assert->stmt_len) |
874 | 1.62k | return (NULL); |
875 | 27.5k | |
876 | 27.5k | return (assert->stmt[idx].id.ptr); |
877 | 27.5k | } |
878 | | |
879 | | size_t |
880 | | fido_assert_id_len(const fido_assert_t *assert, size_t idx) |
881 | 29.1k | { |
882 | 29.1k | if (idx >= assert->stmt_len) |
883 | 1.62k | return (0); |
884 | 27.5k | |
885 | 27.5k | return (assert->stmt[idx].id.len); |
886 | 27.5k | } |
887 | | |
888 | | const unsigned char * |
889 | | fido_assert_user_id_ptr(const fido_assert_t *assert, size_t idx) |
890 | 29.1k | { |
891 | 29.1k | if (idx >= assert->stmt_len) |
892 | 1.62k | return (NULL); |
893 | 27.5k | |
894 | 27.5k | return (assert->stmt[idx].user.id.ptr); |
895 | 27.5k | } |
896 | | |
897 | | size_t |
898 | | fido_assert_user_id_len(const fido_assert_t *assert, size_t idx) |
899 | 29.1k | { |
900 | 29.1k | if (idx >= assert->stmt_len) |
901 | 1.62k | return (0); |
902 | 27.5k | |
903 | 27.5k | return (assert->stmt[idx].user.id.len); |
904 | 27.5k | } |
905 | | |
906 | | const char * |
907 | | fido_assert_user_icon(const fido_assert_t *assert, size_t idx) |
908 | 58.3k | { |
909 | 58.3k | if (idx >= assert->stmt_len) |
910 | 3.25k | return (NULL); |
911 | 55.0k | |
912 | 55.0k | return (assert->stmt[idx].user.icon); |
913 | 55.0k | } |
914 | | |
915 | | const char * |
916 | | fido_assert_user_name(const fido_assert_t *assert, size_t idx) |
917 | 58.3k | { |
918 | 58.3k | if (idx >= assert->stmt_len) |
919 | 3.25k | return (NULL); |
920 | 55.0k | |
921 | 55.0k | return (assert->stmt[idx].user.name); |
922 | 55.0k | } |
923 | | |
924 | | const char * |
925 | | fido_assert_user_display_name(const fido_assert_t *assert, size_t idx) |
926 | 58.3k | { |
927 | 58.3k | if (idx >= assert->stmt_len) |
928 | 3.25k | return (NULL); |
929 | 55.0k | |
930 | 55.0k | return (assert->stmt[idx].user.display_name); |
931 | 55.0k | } |
932 | | |
933 | | const unsigned char * |
934 | | fido_assert_hmac_secret_ptr(const fido_assert_t *assert, size_t idx) |
935 | 29.1k | { |
936 | 29.1k | if (idx >= assert->stmt_len) |
937 | 1.62k | return (NULL); |
938 | 27.5k | |
939 | 27.5k | return (assert->stmt[idx].hmac_secret.ptr); |
940 | 27.5k | } |
941 | | |
942 | | size_t |
943 | | fido_assert_hmac_secret_len(const fido_assert_t *assert, size_t idx) |
944 | 29.1k | { |
945 | 29.1k | if (idx >= assert->stmt_len) |
946 | 1.62k | return (0); |
947 | 27.5k | |
948 | 27.5k | return (assert->stmt[idx].hmac_secret.len); |
949 | 27.5k | } |
950 | | |
951 | | const unsigned char * |
952 | | fido_assert_largeblob_key_ptr(const fido_assert_t *assert, size_t idx) |
953 | 29.1k | { |
954 | 29.1k | if (idx >= assert->stmt_len) |
955 | 1.62k | return (NULL); |
956 | 27.5k | |
957 | 27.5k | return (assert->stmt[idx].largeblob_key.ptr); |
958 | 27.5k | } |
959 | | |
960 | | size_t |
961 | | fido_assert_largeblob_key_len(const fido_assert_t *assert, size_t idx) |
962 | 29.1k | { |
963 | 29.1k | if (idx >= assert->stmt_len) |
964 | 1.62k | return (0); |
965 | 27.5k | |
966 | 27.5k | return (assert->stmt[idx].largeblob_key.len); |
967 | 27.5k | } |
968 | | |
969 | | const unsigned char * |
970 | | fido_assert_blob_ptr(const fido_assert_t *assert, size_t idx) |
971 | 29.1k | { |
972 | 29.1k | if (idx >= assert->stmt_len) |
973 | 1.62k | return (NULL); |
974 | 27.5k | |
975 | 27.5k | return (assert->stmt[idx].authdata_ext.blob.ptr); |
976 | 27.5k | } |
977 | | |
978 | | size_t |
979 | | fido_assert_blob_len(const fido_assert_t *assert, size_t idx) |
980 | 29.1k | { |
981 | 29.1k | if (idx >= assert->stmt_len) |
982 | 1.62k | return (0); |
983 | 27.5k | |
984 | 27.5k | return (assert->stmt[idx].authdata_ext.blob.len); |
985 | 27.5k | } |
986 | | |
987 | | static void |
988 | | fido_assert_clean_authdata(fido_assert_stmt *stmt) |
989 | 1.17k | { |
990 | 1.17k | fido_blob_reset(&stmt->authdata_cbor); |
991 | 1.17k | fido_assert_reset_extattr(&stmt->authdata_ext); |
992 | 1.17k | memset(&stmt->authdata, 0, sizeof(stmt->authdata)); |
993 | 1.17k | } |
994 | | |
995 | | int |
996 | | fido_assert_set_authdata(fido_assert_t *assert, size_t idx, |
997 | | const unsigned char *ptr, size_t len) |
998 | 58.1k | { |
999 | 58.1k | cbor_item_t *item = NULL; |
1000 | 58.1k | fido_assert_stmt *stmt = NULL; |
1001 | 58.1k | struct cbor_load_result cbor; |
1002 | 58.1k | int r; |
1003 | 58.1k | |
1004 | 58.1k | if (idx >= assert->stmt_len || ptr == NULL || len == 0) |
1005 | 57.1k | return (FIDO_ERR_INVALID_ARGUMENT); |
1006 | 1.07k | |
1007 | 1.07k | stmt = &assert->stmt[idx]; |
1008 | 1.07k | fido_assert_clean_authdata(stmt); |
1009 | 1.07k | |
1010 | 1.07k | if ((item = cbor_load(ptr, len, &cbor)) == NULL) { |
1011 | 18 | fido_log_debug("%s: cbor_load", __func__); |
1012 | 18 | r = FIDO_ERR_INVALID_ARGUMENT; |
1013 | 18 | goto fail; |
1014 | 18 | } |
1015 | 1.05k | |
1016 | 1.05k | if (cbor_decode_assert_authdata(item, &stmt->authdata_cbor, |
1017 | 1.05k | &stmt->authdata, &stmt->authdata_ext) < 0) { |
1018 | 20 | fido_log_debug("%s: cbor_decode_assert_authdata", __func__); |
1019 | 20 | r = FIDO_ERR_INVALID_ARGUMENT; |
1020 | 20 | goto fail; |
1021 | 20 | } |
1022 | 1.03k | |
1023 | 1.03k | r = FIDO_OK; |
1024 | 1.07k | fail: |
1025 | 1.07k | if (item != NULL) |
1026 | 1.07k | cbor_decref(&item); |
1027 | 1.07k | |
1028 | 1.07k | if (r != FIDO_OK) |
1029 | 1.07k | fido_assert_clean_authdata(stmt); |
1030 | 1.07k | |
1031 | 1.07k | return (r); |
1032 | 1.03k | } |
1033 | | |
1034 | | int |
1035 | | fido_assert_set_authdata_raw(fido_assert_t *assert, size_t idx, |
1036 | | const unsigned char *ptr, size_t len) |
1037 | 57.1k | { |
1038 | 57.1k | cbor_item_t *item = NULL; |
1039 | 57.1k | fido_assert_stmt *stmt = NULL; |
1040 | 57.1k | int r; |
1041 | 57.1k | |
1042 | 57.1k | if (idx >= assert->stmt_len || ptr == NULL || len == 0) |
1043 | 57.1k | return (FIDO_ERR_INVALID_ARGUMENT); |
1044 | 37 | |
1045 | 37 | stmt = &assert->stmt[idx]; |
1046 | 37 | fido_assert_clean_authdata(stmt); |
1047 | 37 | |
1048 | 37 | if ((item = cbor_build_bytestring(ptr, len)) == NULL) { |
1049 | 1 | fido_log_debug("%s: cbor_build_bytestring", __func__); |
1050 | 1 | r = FIDO_ERR_INTERNAL; |
1051 | 1 | goto fail; |
1052 | 1 | } |
1053 | 36 | |
1054 | 36 | if (cbor_decode_assert_authdata(item, &stmt->authdata_cbor, |
1055 | 36 | &stmt->authdata, &stmt->authdata_ext) < 0) { |
1056 | 27 | fido_log_debug("%s: cbor_decode_assert_authdata", __func__); |
1057 | 27 | r = FIDO_ERR_INVALID_ARGUMENT; |
1058 | 27 | goto fail; |
1059 | 27 | } |
1060 | 9 | |
1061 | 9 | r = FIDO_OK; |
1062 | 37 | fail: |
1063 | 37 | if (item != NULL) |
1064 | 37 | cbor_decref(&item); |
1065 | 37 | |
1066 | 37 | if (r != FIDO_OK) |
1067 | 37 | fido_assert_clean_authdata(stmt); |
1068 | 37 | |
1069 | 37 | return (r); |
1070 | 9 | } |
1071 | | |
1072 | | int |
1073 | | fido_assert_set_sig(fido_assert_t *a, size_t idx, const unsigned char *ptr, |
1074 | | size_t len) |
1075 | 58.1k | { |
1076 | 58.1k | unsigned char *sig; |
1077 | 58.1k | |
1078 | 58.1k | if (idx >= a->stmt_len || ptr == NULL || len == 0) |
1079 | 57.1k | return (FIDO_ERR_INVALID_ARGUMENT); |
1080 | 1.01k | |
1081 | 1.01k | fido_blob_reset(&a->stmt[idx].sig); |
1082 | 1.01k | |
1083 | 1.01k | if ((sig = malloc(len)) == NULL) |
1084 | 1.01k | return (FIDO_ERR_INTERNAL); |
1085 | 1.00k | |
1086 | 1.00k | memcpy(sig, ptr, len); |
1087 | 1.00k | a->stmt[idx].sig.ptr = sig; |
1088 | 1.00k | a->stmt[idx].sig.len = len; |
1089 | 1.00k | |
1090 | 1.00k | return (FIDO_OK); |
1091 | 1.00k | } |
1092 | | |
1093 | | /* XXX shrinking leaks memory; fortunately that shouldn't happen */ |
1094 | | int |
1095 | | fido_assert_set_count(fido_assert_t *assert, size_t n) |
1096 | 29.5k | { |
1097 | 29.5k | void *new_stmt; |
1098 | 29.5k | |
1099 | 29.5k | #ifdef FIDO_FUZZ |
1100 | 29.5k | if (n > UINT8_MAX) { |
1101 | 50 | fido_log_debug("%s: n > UINT8_MAX", __func__); |
1102 | 50 | return (FIDO_ERR_INTERNAL); |
1103 | 50 | } |
1104 | 29.5k | #endif |
1105 | 29.5k | |
1106 | 29.5k | new_stmt = recallocarray(assert->stmt, assert->stmt_cnt, n, |
1107 | 29.5k | sizeof(fido_assert_stmt)); |
1108 | 29.5k | if (new_stmt == NULL) |
1109 | 29.5k | return (FIDO_ERR_INTERNAL); |
1110 | 29.4k | |
1111 | 29.4k | assert->stmt = new_stmt; |
1112 | 29.4k | assert->stmt_cnt = n; |
1113 | 29.4k | assert->stmt_len = n; |
1114 | 29.4k | |
1115 | 29.4k | return (FIDO_OK); |
1116 | 29.4k | } |