1 /*
2 * Copyright 2015-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
12
13 /*
14 * SHA-1 low level APIs are deprecated for public use, but still ok for
15 * internal use. Note, that due to symbols not being exported, only the
16 * #defines and structures can be accessed, in this case SHA_CBLOCK and
17 * sizeof(SHA_CTX).
18 */
19 #include "internal/deprecated.h"
20
21 #include <openssl/opensslconf.h>
22 #if defined(_WIN32)
23 # include <windows.h>
24 #endif
25
26 #include <stdio.h>
27 #include <string.h>
28
29 #include <openssl/engine.h>
30 #include <openssl/sha.h>
31 #include <openssl/aes.h>
32 #include <openssl/rsa.h>
33 #include <openssl/evp.h>
34 #include <openssl/async.h>
35 #include <openssl/bn.h>
36 #include <openssl/crypto.h>
37 #include <openssl/ssl.h>
38 #include <openssl/modes.h>
39
40 #if defined(OPENSSL_SYS_UNIX) && defined(OPENSSL_THREADS)
41 # undef ASYNC_POSIX
42 # define ASYNC_POSIX
43 # include <unistd.h>
44 #elif defined(_WIN32)
45 # undef ASYNC_WIN
46 # define ASYNC_WIN
47 #endif
48
49 #include "e_dasync_err.c"
50
51 /* Engine Id and Name */
52 static const char *engine_dasync_id = "dasync";
53 static const char *engine_dasync_name = "Dummy Async engine support";
54
55
56 /* Engine Lifetime functions */
57 static int dasync_destroy(ENGINE *e);
58 static int dasync_init(ENGINE *e);
59 static int dasync_finish(ENGINE *e);
60 void engine_load_dasync_int(void);
61
62
63 /* Set up digests. Just SHA1 for now */
64 static int dasync_digests(ENGINE *e, const EVP_MD **digest,
65 const int **nids, int nid);
66
67 static void dummy_pause_job(void);
68
69 /* SHA1 */
70 static int dasync_sha1_init(EVP_MD_CTX *ctx);
71 static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
72 size_t count);
73 static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md);
74
75 /*
76 * Holds the EVP_MD object for sha1 in this engine. Set up once only during
77 * engine bind and can then be reused many times.
78 */
79 static EVP_MD *_hidden_sha1_md = NULL;
dasync_sha1(void)80 static const EVP_MD *dasync_sha1(void)
81 {
82 return _hidden_sha1_md;
83 }
destroy_digests(void)84 static void destroy_digests(void)
85 {
86 EVP_MD_meth_free(_hidden_sha1_md);
87 _hidden_sha1_md = NULL;
88 }
89
dasync_digest_nids(const int ** nids)90 static int dasync_digest_nids(const int **nids)
91 {
92 static int digest_nids[2] = { 0, 0 };
93 static int pos = 0;
94 static int init = 0;
95
96 if (!init) {
97 const EVP_MD *md;
98 if ((md = dasync_sha1()) != NULL)
99 digest_nids[pos++] = EVP_MD_get_type(md);
100 digest_nids[pos] = 0;
101 init = 1;
102 }
103 *nids = digest_nids;
104 return pos;
105 }
106
107 /* RSA */
108 static int dasync_pkey(ENGINE *e, EVP_PKEY_METHOD **pmeth,
109 const int **pnids, int nid);
110
111 static int dasync_rsa_init(EVP_PKEY_CTX *ctx);
112 static void dasync_rsa_cleanup(EVP_PKEY_CTX *ctx);
113 static int dasync_rsa_paramgen_init(EVP_PKEY_CTX *ctx);
114 static int dasync_rsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
115 static int dasync_rsa_keygen_init(EVP_PKEY_CTX *ctx);
116 static int dasync_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
117 static int dasync_rsa_encrypt_init(EVP_PKEY_CTX *ctx);
118 static int dasync_rsa_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
119 size_t *outlen, const unsigned char *in,
120 size_t inlen);
121 static int dasync_rsa_decrypt_init(EVP_PKEY_CTX *ctx);
122 static int dasync_rsa_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
123 size_t *outlen, const unsigned char *in,
124 size_t inlen);
125 static int dasync_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
126 static int dasync_rsa_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
127 const char *value);
128
129 static EVP_PKEY_METHOD *dasync_rsa;
130 static const EVP_PKEY_METHOD *dasync_rsa_orig;
131
132 /* AES */
133
134 static int dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
135 void *ptr);
136 static int dasync_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
137 const unsigned char *iv, int enc);
138 static int dasync_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
139 const unsigned char *in, size_t inl);
140 static int dasync_aes128_cbc_cleanup(EVP_CIPHER_CTX *ctx);
141
142 static int dasync_aes256_ctr_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
143 void *ptr);
144 static int dasync_aes256_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
145 const unsigned char *iv, int enc);
146 static int dasync_aes256_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
147 const unsigned char *in, size_t inl);
148 static int dasync_aes256_ctr_cleanup(EVP_CIPHER_CTX *ctx);
149
150 static int dasync_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
151 int arg, void *ptr);
152 static int dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
153 const unsigned char *key,
154 const unsigned char *iv,
155 int enc);
156 static int dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
157 unsigned char *out,
158 const unsigned char *in,
159 size_t inl);
160 static int dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX *ctx);
161
162 struct dasync_pipeline_ctx {
163 void *inner_cipher_data;
164 unsigned int numpipes;
165 unsigned char **inbufs;
166 unsigned char **outbufs;
167 size_t *lens;
168 unsigned char tlsaad[SSL_MAX_PIPELINES][EVP_AEAD_TLS1_AAD_LEN];
169 unsigned int aadctr;
170 };
171
172 /*
173 * Holds the EVP_CIPHER object for aes_128_cbc in this engine. Set up once only
174 * during engine bind and can then be reused many times.
175 */
176 static EVP_CIPHER *_hidden_aes_128_cbc = NULL;
dasync_aes_128_cbc(void)177 static const EVP_CIPHER *dasync_aes_128_cbc(void)
178 {
179 return _hidden_aes_128_cbc;
180 }
181
182 static EVP_CIPHER *_hidden_aes_256_ctr = NULL;
dasync_aes_256_ctr(void)183 static const EVP_CIPHER *dasync_aes_256_ctr(void)
184 {
185 return _hidden_aes_256_ctr;
186 }
187
188 /*
189 * Holds the EVP_CIPHER object for aes_128_cbc_hmac_sha1 in this engine. Set up
190 * once only during engine bind and can then be reused many times.
191 *
192 * This 'stitched' cipher depends on the EVP_aes_128_cbc_hmac_sha1() cipher,
193 * which is implemented only if the AES-NI instruction set extension is available
194 * (see OPENSSL_IA32CAP(3)). If that's not the case, then this cipher will not
195 * be available either.
196 *
197 * Note: Since it is a legacy mac-then-encrypt cipher, modern TLS peers (which
198 * negotiate the encrypt-then-mac extension) won't negotiate it anyway.
199 */
200 static EVP_CIPHER *_hidden_aes_128_cbc_hmac_sha1 = NULL;
dasync_aes_128_cbc_hmac_sha1(void)201 static const EVP_CIPHER *dasync_aes_128_cbc_hmac_sha1(void)
202 {
203 return _hidden_aes_128_cbc_hmac_sha1;
204 }
205
destroy_ciphers(void)206 static void destroy_ciphers(void)
207 {
208 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
209 EVP_CIPHER_meth_free(_hidden_aes_256_ctr);
210 EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1);
211 _hidden_aes_128_cbc = NULL;
212 _hidden_aes_256_ctr = NULL;
213 _hidden_aes_128_cbc_hmac_sha1 = NULL;
214 }
215
216 static int dasync_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
217 const int **nids, int nid);
218
219 static int dasync_cipher_nids[] = {
220 NID_aes_128_cbc,
221 NID_aes_256_ctr,
222 NID_aes_128_cbc_hmac_sha1,
223 0
224 };
225
bind_dasync(ENGINE * e)226 static int bind_dasync(ENGINE *e)
227 {
228 /* Setup RSA */
229 if ((dasync_rsa_orig = EVP_PKEY_meth_find(EVP_PKEY_RSA)) == NULL
230 || (dasync_rsa = EVP_PKEY_meth_new(EVP_PKEY_RSA,
231 EVP_PKEY_FLAG_AUTOARGLEN)) == NULL)
232 return 0;
233 EVP_PKEY_meth_set_init(dasync_rsa, dasync_rsa_init);
234 EVP_PKEY_meth_set_cleanup(dasync_rsa, dasync_rsa_cleanup);
235 EVP_PKEY_meth_set_paramgen(dasync_rsa, dasync_rsa_paramgen_init,
236 dasync_rsa_paramgen);
237 EVP_PKEY_meth_set_keygen(dasync_rsa, dasync_rsa_keygen_init,
238 dasync_rsa_keygen);
239 EVP_PKEY_meth_set_encrypt(dasync_rsa, dasync_rsa_encrypt_init,
240 dasync_rsa_encrypt);
241 EVP_PKEY_meth_set_decrypt(dasync_rsa, dasync_rsa_decrypt_init,
242 dasync_rsa_decrypt);
243 EVP_PKEY_meth_set_ctrl(dasync_rsa, dasync_rsa_ctrl,
244 dasync_rsa_ctrl_str);
245
246 /* Ensure the dasync error handling is set up */
247 ERR_load_DASYNC_strings();
248
249 if (!ENGINE_set_id(e, engine_dasync_id)
250 || !ENGINE_set_name(e, engine_dasync_name)
251 || !ENGINE_set_pkey_meths(e, dasync_pkey)
252 || !ENGINE_set_digests(e, dasync_digests)
253 || !ENGINE_set_ciphers(e, dasync_ciphers)
254 || !ENGINE_set_destroy_function(e, dasync_destroy)
255 || !ENGINE_set_init_function(e, dasync_init)
256 || !ENGINE_set_finish_function(e, dasync_finish)) {
257 DASYNCerr(DASYNC_F_BIND_DASYNC, DASYNC_R_INIT_FAILED);
258 return 0;
259 }
260
261 /*
262 * Set up the EVP_CIPHER and EVP_MD objects for the ciphers/digests
263 * supplied by this engine
264 */
265 _hidden_sha1_md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption);
266 if (_hidden_sha1_md == NULL
267 || !EVP_MD_meth_set_result_size(_hidden_sha1_md, SHA_DIGEST_LENGTH)
268 || !EVP_MD_meth_set_input_blocksize(_hidden_sha1_md, SHA_CBLOCK)
269 || !EVP_MD_meth_set_app_datasize(_hidden_sha1_md,
270 sizeof(EVP_MD *) + sizeof(SHA_CTX))
271 || !EVP_MD_meth_set_flags(_hidden_sha1_md, EVP_MD_FLAG_DIGALGID_ABSENT)
272 || !EVP_MD_meth_set_init(_hidden_sha1_md, dasync_sha1_init)
273 || !EVP_MD_meth_set_update(_hidden_sha1_md, dasync_sha1_update)
274 || !EVP_MD_meth_set_final(_hidden_sha1_md, dasync_sha1_final)) {
275 EVP_MD_meth_free(_hidden_sha1_md);
276 _hidden_sha1_md = NULL;
277 }
278
279 _hidden_aes_128_cbc = EVP_CIPHER_meth_new(NID_aes_128_cbc,
280 16 /* block size */,
281 16 /* key len */);
282 if (_hidden_aes_128_cbc == NULL
283 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc,16)
284 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc,
285 EVP_CIPH_FLAG_DEFAULT_ASN1
286 | EVP_CIPH_CBC_MODE
287 | EVP_CIPH_FLAG_PIPELINE
288 | EVP_CIPH_CUSTOM_COPY)
289 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc,
290 dasync_aes128_init_key)
291 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc,
292 dasync_aes128_cbc_cipher)
293 || !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc,
294 dasync_aes128_cbc_cleanup)
295 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_cbc,
296 dasync_aes128_cbc_ctrl)
297 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc,
298 sizeof(struct dasync_pipeline_ctx))) {
299 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
300 _hidden_aes_128_cbc = NULL;
301 }
302
303 _hidden_aes_256_ctr = EVP_CIPHER_meth_new(NID_aes_256_ctr,
304 1 /* block size */,
305 32 /* key len */);
306 if (_hidden_aes_256_ctr == NULL
307 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_256_ctr,16)
308 || !EVP_CIPHER_meth_set_flags(_hidden_aes_256_ctr,
309 EVP_CIPH_FLAG_DEFAULT_ASN1
310 | EVP_CIPH_CTR_MODE
311 | EVP_CIPH_FLAG_PIPELINE
312 | EVP_CIPH_CUSTOM_COPY)
313 || !EVP_CIPHER_meth_set_init(_hidden_aes_256_ctr,
314 dasync_aes256_init_key)
315 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_256_ctr,
316 dasync_aes256_ctr_cipher)
317 || !EVP_CIPHER_meth_set_cleanup(_hidden_aes_256_ctr,
318 dasync_aes256_ctr_cleanup)
319 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_256_ctr,
320 dasync_aes256_ctr_ctrl)
321 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_256_ctr,
322 sizeof(struct dasync_pipeline_ctx))) {
323 EVP_CIPHER_meth_free(_hidden_aes_256_ctr);
324 _hidden_aes_256_ctr = NULL;
325 }
326
327 _hidden_aes_128_cbc_hmac_sha1 = EVP_CIPHER_meth_new(
328 NID_aes_128_cbc_hmac_sha1,
329 16 /* block size */,
330 16 /* key len */);
331 if (_hidden_aes_128_cbc_hmac_sha1 == NULL
332 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc_hmac_sha1,16)
333 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc_hmac_sha1,
334 EVP_CIPH_CBC_MODE
335 | EVP_CIPH_FLAG_DEFAULT_ASN1
336 | EVP_CIPH_FLAG_AEAD_CIPHER
337 | EVP_CIPH_FLAG_PIPELINE
338 | EVP_CIPH_CUSTOM_COPY)
339 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc_hmac_sha1,
340 dasync_aes128_cbc_hmac_sha1_init_key)
341 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc_hmac_sha1,
342 dasync_aes128_cbc_hmac_sha1_cipher)
343 || !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc_hmac_sha1,
344 dasync_aes128_cbc_hmac_sha1_cleanup)
345 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_cbc_hmac_sha1,
346 dasync_aes128_cbc_hmac_sha1_ctrl)
347 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc_hmac_sha1,
348 sizeof(struct dasync_pipeline_ctx))) {
349 EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1);
350 _hidden_aes_128_cbc_hmac_sha1 = NULL;
351 }
352
353 return 1;
354 }
355
destroy_pkey(void)356 static void destroy_pkey(void)
357 {
358 /*
359 * We don't actually need to free the dasync_rsa method since this is
360 * automatically freed for us by libcrypto.
361 */
362 dasync_rsa_orig = NULL;
363 dasync_rsa = NULL;
364 }
365
366 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
bind_helper(ENGINE * e,const char * id)367 static int bind_helper(ENGINE *e, const char *id)
368 {
369 if (id && (strcmp(id, engine_dasync_id) != 0))
370 return 0;
371 if (!bind_dasync(e))
372 return 0;
373 return 1;
374 }
375
376 IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)377 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
378 # endif
379
380 static ENGINE *engine_dasync(void)
381 {
382 ENGINE *ret = ENGINE_new();
383 if (!ret)
384 return NULL;
385 if (!bind_dasync(ret)) {
386 ENGINE_free(ret);
387 return NULL;
388 }
389 return ret;
390 }
391
engine_load_dasync_int(void)392 void engine_load_dasync_int(void)
393 {
394 ENGINE *toadd = engine_dasync();
395 if (!toadd)
396 return;
397 ERR_set_mark();
398 ENGINE_add(toadd);
399 /*
400 * If the "add" worked, it gets a structural reference. So either way, we
401 * release our just-created reference.
402 */
403 ENGINE_free(toadd);
404 /*
405 * If the "add" didn't work, it was probably a conflict because it was
406 * already added (eg. someone calling ENGINE_load_blah then calling
407 * ENGINE_load_builtin_engines() perhaps).
408 */
409 ERR_pop_to_mark();
410 }
411
dasync_init(ENGINE * e)412 static int dasync_init(ENGINE *e)
413 {
414 return 1;
415 }
416
417
dasync_finish(ENGINE * e)418 static int dasync_finish(ENGINE *e)
419 {
420 return 1;
421 }
422
423
dasync_destroy(ENGINE * e)424 static int dasync_destroy(ENGINE *e)
425 {
426 destroy_digests();
427 destroy_ciphers();
428 destroy_pkey();
429 ERR_unload_DASYNC_strings();
430 return 1;
431 }
432
dasync_pkey(ENGINE * e,EVP_PKEY_METHOD ** pmeth,const int ** pnids,int nid)433 static int dasync_pkey(ENGINE *e, EVP_PKEY_METHOD **pmeth,
434 const int **pnids, int nid)
435 {
436 static const int rnid = EVP_PKEY_RSA;
437
438 if (pmeth == NULL) {
439 *pnids = &rnid;
440 return 1;
441 }
442
443 if (nid == EVP_PKEY_RSA) {
444 *pmeth = dasync_rsa;
445 return 1;
446 }
447
448 *pmeth = NULL;
449 return 0;
450 }
451
dasync_digests(ENGINE * e,const EVP_MD ** digest,const int ** nids,int nid)452 static int dasync_digests(ENGINE *e, const EVP_MD **digest,
453 const int **nids, int nid)
454 {
455 int ok = 1;
456 if (!digest) {
457 /* We are returning a list of supported nids */
458 return dasync_digest_nids(nids);
459 }
460 /* We are being asked for a specific digest */
461 switch (nid) {
462 case NID_sha1:
463 *digest = dasync_sha1();
464 break;
465 default:
466 ok = 0;
467 *digest = NULL;
468 break;
469 }
470 return ok;
471 }
472
dasync_ciphers(ENGINE * e,const EVP_CIPHER ** cipher,const int ** nids,int nid)473 static int dasync_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
474 const int **nids, int nid)
475 {
476 int ok = 1;
477 if (cipher == NULL) {
478 /* We are returning a list of supported nids */
479 *nids = dasync_cipher_nids;
480 return (sizeof(dasync_cipher_nids) -
481 1) / sizeof(dasync_cipher_nids[0]);
482 }
483 /* We are being asked for a specific cipher */
484 switch (nid) {
485 case NID_aes_128_cbc:
486 *cipher = dasync_aes_128_cbc();
487 break;
488 case NID_aes_256_ctr:
489 *cipher = dasync_aes_256_ctr();
490 break;
491 case NID_aes_128_cbc_hmac_sha1:
492 *cipher = dasync_aes_128_cbc_hmac_sha1();
493 break;
494 default:
495 ok = 0;
496 *cipher = NULL;
497 break;
498 }
499 return ok;
500 }
501
wait_cleanup(ASYNC_WAIT_CTX * ctx,const void * key,OSSL_ASYNC_FD readfd,void * pvwritefd)502 static void wait_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
503 OSSL_ASYNC_FD readfd, void *pvwritefd)
504 {
505 OSSL_ASYNC_FD *pwritefd = (OSSL_ASYNC_FD *)pvwritefd;
506 #if defined(ASYNC_WIN)
507 CloseHandle(readfd);
508 CloseHandle(*pwritefd);
509 #elif defined(ASYNC_POSIX)
510 close(readfd);
511 close(*pwritefd);
512 #endif
513 OPENSSL_free(pwritefd);
514 }
515
516 #define DUMMY_CHAR 'X'
517
dummy_pause_job(void)518 static void dummy_pause_job(void) {
519 ASYNC_JOB *job;
520 ASYNC_WAIT_CTX *waitctx;
521 ASYNC_callback_fn callback;
522 void *callback_arg;
523 OSSL_ASYNC_FD pipefds[2] = {0, 0};
524 OSSL_ASYNC_FD *writefd;
525 #if defined(ASYNC_WIN)
526 DWORD numwritten, numread;
527 char buf = DUMMY_CHAR;
528 #elif defined(ASYNC_POSIX)
529 char buf = DUMMY_CHAR;
530 #endif
531
532 if ((job = ASYNC_get_current_job()) == NULL)
533 return;
534
535 waitctx = ASYNC_get_wait_ctx(job);
536
537 if (ASYNC_WAIT_CTX_get_callback(waitctx, &callback, &callback_arg) && callback != NULL) {
538 /*
539 * In the Dummy async engine we are cheating. We call the callback that the job
540 * is complete before the call to ASYNC_pause_job(). A real
541 * async engine would only call the callback when the job was actually complete
542 */
543 (*callback)(callback_arg);
544 ASYNC_pause_job();
545 return;
546 }
547
548
549 if (ASYNC_WAIT_CTX_get_fd(waitctx, engine_dasync_id, &pipefds[0],
550 (void **)&writefd)) {
551 pipefds[1] = *writefd;
552 } else {
553 writefd = OPENSSL_malloc(sizeof(*writefd));
554 if (writefd == NULL)
555 return;
556 #if defined(ASYNC_WIN)
557 if (CreatePipe(&pipefds[0], &pipefds[1], NULL, 256) == 0) {
558 OPENSSL_free(writefd);
559 return;
560 }
561 #elif defined(ASYNC_POSIX)
562 if (pipe(pipefds) != 0) {
563 OPENSSL_free(writefd);
564 return;
565 }
566 #endif
567 *writefd = pipefds[1];
568
569 if (!ASYNC_WAIT_CTX_set_wait_fd(waitctx, engine_dasync_id, pipefds[0],
570 writefd, wait_cleanup)) {
571 wait_cleanup(waitctx, engine_dasync_id, pipefds[0], writefd);
572 return;
573 }
574 }
575 /*
576 * In the Dummy async engine we are cheating. We signal that the job
577 * is complete by waking it before the call to ASYNC_pause_job(). A real
578 * async engine would only wake when the job was actually complete
579 */
580 #if defined(ASYNC_WIN)
581 WriteFile(pipefds[1], &buf, 1, &numwritten, NULL);
582 #elif defined(ASYNC_POSIX)
583 if (write(pipefds[1], &buf, 1) < 0)
584 return;
585 #endif
586
587 /* Ignore errors - we carry on anyway */
588 ASYNC_pause_job();
589
590 /* Clear the wake signal */
591 #if defined(ASYNC_WIN)
592 ReadFile(pipefds[0], &buf, 1, &numread, NULL);
593 #elif defined(ASYNC_POSIX)
594 if (read(pipefds[0], &buf, 1) < 0)
595 return;
596 #endif
597 }
598
599 /*
600 * SHA1 implementation. At the moment we just defer to the standard
601 * implementation
602 */
dasync_sha1_init(EVP_MD_CTX * ctx)603 static int dasync_sha1_init(EVP_MD_CTX *ctx)
604 {
605 dummy_pause_job();
606
607 return EVP_MD_meth_get_init(EVP_sha1())(ctx);
608 }
609
dasync_sha1_update(EVP_MD_CTX * ctx,const void * data,size_t count)610 static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
611 size_t count)
612 {
613 dummy_pause_job();
614
615 return EVP_MD_meth_get_update(EVP_sha1())(ctx, data, count);
616 }
617
dasync_sha1_final(EVP_MD_CTX * ctx,unsigned char * md)618 static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
619 {
620 dummy_pause_job();
621
622 return EVP_MD_meth_get_final(EVP_sha1())(ctx, md);
623 }
624
625 /* Cipher helper functions */
626
dasync_cipher_ctrl_helper(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr,int aeadcapable,const EVP_CIPHER * ciph)627 static int dasync_cipher_ctrl_helper(EVP_CIPHER_CTX *ctx, int type, int arg,
628 void *ptr, int aeadcapable,
629 const EVP_CIPHER *ciph)
630 {
631 int ret;
632 struct dasync_pipeline_ctx *pipe_ctx =
633 (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
634
635 if (pipe_ctx == NULL)
636 return 0;
637
638 switch (type) {
639 case EVP_CTRL_COPY:
640 {
641 size_t sz = EVP_CIPHER_impl_ctx_size(ciph);
642 void *inner_cipher_data = OPENSSL_malloc(sz);
643
644 if (inner_cipher_data == NULL)
645 return -1;
646 memcpy(inner_cipher_data, pipe_ctx->inner_cipher_data, sz);
647 pipe_ctx->inner_cipher_data = inner_cipher_data;
648 }
649 break;
650
651 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS:
652 pipe_ctx->numpipes = arg;
653 pipe_ctx->outbufs = (unsigned char **)ptr;
654 break;
655
656 case EVP_CTRL_SET_PIPELINE_INPUT_BUFS:
657 pipe_ctx->numpipes = arg;
658 pipe_ctx->inbufs = (unsigned char **)ptr;
659 break;
660
661 case EVP_CTRL_SET_PIPELINE_INPUT_LENS:
662 pipe_ctx->numpipes = arg;
663 pipe_ctx->lens = (size_t *)ptr;
664 break;
665
666 case EVP_CTRL_AEAD_SET_MAC_KEY:
667 if (!aeadcapable)
668 return -1;
669 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
670 ret = EVP_CIPHER_meth_get_ctrl(EVP_aes_128_cbc_hmac_sha1())
671 (ctx, type, arg, ptr);
672 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
673 return ret;
674
675 case EVP_CTRL_AEAD_TLS1_AAD:
676 {
677 unsigned char *p = ptr;
678 unsigned int len;
679
680 if (!aeadcapable || arg != EVP_AEAD_TLS1_AAD_LEN)
681 return -1;
682
683 if (pipe_ctx->aadctr >= SSL_MAX_PIPELINES)
684 return -1;
685
686 memcpy(pipe_ctx->tlsaad[pipe_ctx->aadctr], ptr,
687 EVP_AEAD_TLS1_AAD_LEN);
688 pipe_ctx->aadctr++;
689
690 len = p[arg - 2] << 8 | p[arg - 1];
691
692 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
693 if ((p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
694 if (len < AES_BLOCK_SIZE)
695 return 0;
696 len -= AES_BLOCK_SIZE;
697 }
698
699 return ((len + SHA_DIGEST_LENGTH + AES_BLOCK_SIZE)
700 & -AES_BLOCK_SIZE) - len;
701 } else {
702 return SHA_DIGEST_LENGTH;
703 }
704 }
705
706 default:
707 return 0;
708 }
709
710 return 1;
711 }
712
dasync_cipher_init_key_helper(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc,const EVP_CIPHER * cipher)713 static int dasync_cipher_init_key_helper(EVP_CIPHER_CTX *ctx,
714 const unsigned char *key,
715 const unsigned char *iv, int enc,
716 const EVP_CIPHER *cipher)
717 {
718 int ret;
719 struct dasync_pipeline_ctx *pipe_ctx =
720 (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
721
722 if (pipe_ctx->inner_cipher_data == NULL
723 && EVP_CIPHER_impl_ctx_size(cipher) != 0) {
724 pipe_ctx->inner_cipher_data = OPENSSL_zalloc(
725 EVP_CIPHER_impl_ctx_size(cipher));
726 if (pipe_ctx->inner_cipher_data == NULL)
727 return 0;
728 }
729
730 pipe_ctx->numpipes = 0;
731 pipe_ctx->aadctr = 0;
732
733 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
734 ret = EVP_CIPHER_meth_get_init(cipher)(ctx, key, iv, enc);
735 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
736
737 return ret;
738 }
739
dasync_cipher_helper(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl,const EVP_CIPHER * cipher)740 static int dasync_cipher_helper(EVP_CIPHER_CTX *ctx, unsigned char *out,
741 const unsigned char *in, size_t inl,
742 const EVP_CIPHER *cipher)
743 {
744 int ret = 1;
745 unsigned int i, pipes;
746 struct dasync_pipeline_ctx *pipe_ctx =
747 (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
748
749 pipes = pipe_ctx->numpipes;
750 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
751 if (pipes == 0) {
752 if (pipe_ctx->aadctr != 0) {
753 if (pipe_ctx->aadctr != 1)
754 return -1;
755 EVP_CIPHER_meth_get_ctrl(cipher)
756 (ctx, EVP_CTRL_AEAD_TLS1_AAD,
757 EVP_AEAD_TLS1_AAD_LEN,
758 pipe_ctx->tlsaad[0]);
759 }
760 ret = EVP_CIPHER_meth_get_do_cipher(cipher)
761 (ctx, out, in, inl);
762 } else {
763 if (pipe_ctx->aadctr > 0 && pipe_ctx->aadctr != pipes)
764 return -1;
765 for (i = 0; i < pipes; i++) {
766 if (pipe_ctx->aadctr > 0) {
767 EVP_CIPHER_meth_get_ctrl(cipher)
768 (ctx, EVP_CTRL_AEAD_TLS1_AAD,
769 EVP_AEAD_TLS1_AAD_LEN,
770 pipe_ctx->tlsaad[i]);
771 }
772 ret = ret && EVP_CIPHER_meth_get_do_cipher(cipher)
773 (ctx, pipe_ctx->outbufs[i], pipe_ctx->inbufs[i],
774 pipe_ctx->lens[i]);
775 }
776 pipe_ctx->numpipes = 0;
777 }
778 pipe_ctx->aadctr = 0;
779 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
780 return ret;
781 }
782
dasync_cipher_cleanup_helper(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher)783 static int dasync_cipher_cleanup_helper(EVP_CIPHER_CTX *ctx,
784 const EVP_CIPHER *cipher)
785 {
786 struct dasync_pipeline_ctx *pipe_ctx =
787 (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
788
789 OPENSSL_clear_free(pipe_ctx->inner_cipher_data,
790 EVP_CIPHER_impl_ctx_size(cipher));
791
792 return 1;
793 }
794
795 /*
796 * AES128 CBC Implementation
797 */
798
dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)799 static int dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
800 void *ptr)
801 {
802 return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 0, EVP_aes_128_cbc());
803 }
804
dasync_aes128_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)805 static int dasync_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
806 const unsigned char *iv, int enc)
807 {
808 return dasync_cipher_init_key_helper(ctx, key, iv, enc, EVP_aes_128_cbc());
809 }
810
dasync_aes128_cbc_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)811 static int dasync_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
812 const unsigned char *in, size_t inl)
813 {
814 return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_128_cbc());
815 }
816
dasync_aes128_cbc_cleanup(EVP_CIPHER_CTX * ctx)817 static int dasync_aes128_cbc_cleanup(EVP_CIPHER_CTX *ctx)
818 {
819 return dasync_cipher_cleanup_helper(ctx, EVP_aes_128_cbc());
820 }
821
dasync_aes256_ctr_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)822 static int dasync_aes256_ctr_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
823 void *ptr)
824 {
825 return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 0, EVP_aes_256_ctr());
826 }
827
dasync_aes256_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)828 static int dasync_aes256_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
829 const unsigned char *iv, int enc)
830 {
831 return dasync_cipher_init_key_helper(ctx, key, iv, enc, EVP_aes_256_ctr());
832 }
833
dasync_aes256_ctr_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)834 static int dasync_aes256_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
835 const unsigned char *in, size_t inl)
836 {
837 return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_256_ctr());
838 }
839
dasync_aes256_ctr_cleanup(EVP_CIPHER_CTX * ctx)840 static int dasync_aes256_ctr_cleanup(EVP_CIPHER_CTX *ctx)
841 {
842 return dasync_cipher_cleanup_helper(ctx, EVP_aes_256_ctr());
843 }
844
845
846 /*
847 * AES128 CBC HMAC SHA1 Implementation
848 */
849
dasync_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)850 static int dasync_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
851 int arg, void *ptr)
852 {
853 return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 1, EVP_aes_128_cbc_hmac_sha1());
854 }
855
dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)856 static int dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
857 const unsigned char *key,
858 const unsigned char *iv,
859 int enc)
860 {
861 /*
862 * We can safely assume that EVP_aes_128_cbc_hmac_sha1() != NULL,
863 * see comment before the definition of dasync_aes_128_cbc_hmac_sha1().
864 */
865 return dasync_cipher_init_key_helper(ctx, key, iv, enc,
866 EVP_aes_128_cbc_hmac_sha1());
867 }
868
dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)869 static int dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
870 unsigned char *out,
871 const unsigned char *in,
872 size_t inl)
873 {
874 return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_128_cbc_hmac_sha1());
875 }
876
dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX * ctx)877 static int dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX *ctx)
878 {
879 /*
880 * We can safely assume that EVP_aes_128_cbc_hmac_sha1() != NULL,
881 * see comment before the definition of dasync_aes_128_cbc_hmac_sha1().
882 */
883 return dasync_cipher_cleanup_helper(ctx, EVP_aes_128_cbc_hmac_sha1());
884 }
885
886
887 /*
888 * RSA implementation
889 */
dasync_rsa_init(EVP_PKEY_CTX * ctx)890 static int dasync_rsa_init(EVP_PKEY_CTX *ctx)
891 {
892 static int (*pinit)(EVP_PKEY_CTX *ctx);
893
894 if (pinit == NULL)
895 EVP_PKEY_meth_get_init(dasync_rsa_orig, &pinit);
896 return pinit(ctx);
897 }
898
dasync_rsa_cleanup(EVP_PKEY_CTX * ctx)899 static void dasync_rsa_cleanup(EVP_PKEY_CTX *ctx)
900 {
901 static void (*pcleanup)(EVP_PKEY_CTX *ctx);
902
903 if (pcleanup == NULL)
904 EVP_PKEY_meth_get_cleanup(dasync_rsa_orig, &pcleanup);
905 pcleanup(ctx);
906 }
907
dasync_rsa_paramgen_init(EVP_PKEY_CTX * ctx)908 static int dasync_rsa_paramgen_init(EVP_PKEY_CTX *ctx)
909 {
910 static int (*pparamgen_init)(EVP_PKEY_CTX *ctx);
911
912 if (pparamgen_init == NULL)
913 EVP_PKEY_meth_get_paramgen(dasync_rsa_orig, &pparamgen_init, NULL);
914 return pparamgen_init != NULL ? pparamgen_init(ctx) : 1;
915 }
916
dasync_rsa_paramgen(EVP_PKEY_CTX * ctx,EVP_PKEY * pkey)917 static int dasync_rsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
918 {
919 static int (*pparamgen)(EVP_PKEY_CTX *c, EVP_PKEY *pkey);
920
921 if (pparamgen == NULL)
922 EVP_PKEY_meth_get_paramgen(dasync_rsa_orig, NULL, &pparamgen);
923 return pparamgen != NULL ? pparamgen(ctx, pkey) : 1;
924 }
925
dasync_rsa_keygen_init(EVP_PKEY_CTX * ctx)926 static int dasync_rsa_keygen_init(EVP_PKEY_CTX *ctx)
927 {
928 static int (*pkeygen_init)(EVP_PKEY_CTX *ctx);
929
930 if (pkeygen_init == NULL)
931 EVP_PKEY_meth_get_keygen(dasync_rsa_orig, &pkeygen_init, NULL);
932 return pkeygen_init != NULL ? pkeygen_init(ctx) : 1;
933 }
934
dasync_rsa_keygen(EVP_PKEY_CTX * ctx,EVP_PKEY * pkey)935 static int dasync_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
936 {
937 static int (*pkeygen)(EVP_PKEY_CTX *c, EVP_PKEY *pkey);
938
939 if (pkeygen == NULL)
940 EVP_PKEY_meth_get_keygen(dasync_rsa_orig, NULL, &pkeygen);
941 return pkeygen(ctx, pkey);
942 }
943
dasync_rsa_encrypt_init(EVP_PKEY_CTX * ctx)944 static int dasync_rsa_encrypt_init(EVP_PKEY_CTX *ctx)
945 {
946 static int (*pencrypt_init)(EVP_PKEY_CTX *ctx);
947
948 if (pencrypt_init == NULL)
949 EVP_PKEY_meth_get_encrypt(dasync_rsa_orig, &pencrypt_init, NULL);
950 return pencrypt_init != NULL ? pencrypt_init(ctx) : 1;
951 }
952
dasync_rsa_encrypt(EVP_PKEY_CTX * ctx,unsigned char * out,size_t * outlen,const unsigned char * in,size_t inlen)953 static int dasync_rsa_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
954 size_t *outlen, const unsigned char *in,
955 size_t inlen)
956 {
957 static int (*pencryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out,
958 size_t *outlen, const unsigned char *in,
959 size_t inlen);
960
961 if (pencryptfn == NULL)
962 EVP_PKEY_meth_get_encrypt(dasync_rsa_orig, NULL, &pencryptfn);
963 return pencryptfn(ctx, out, outlen, in, inlen);
964 }
965
dasync_rsa_decrypt_init(EVP_PKEY_CTX * ctx)966 static int dasync_rsa_decrypt_init(EVP_PKEY_CTX *ctx)
967 {
968 static int (*pdecrypt_init)(EVP_PKEY_CTX *ctx);
969
970 if (pdecrypt_init == NULL)
971 EVP_PKEY_meth_get_decrypt(dasync_rsa_orig, &pdecrypt_init, NULL);
972 return pdecrypt_init != NULL ? pdecrypt_init(ctx) : 1;
973 }
974
dasync_rsa_decrypt(EVP_PKEY_CTX * ctx,unsigned char * out,size_t * outlen,const unsigned char * in,size_t inlen)975 static int dasync_rsa_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
976 size_t *outlen, const unsigned char *in,
977 size_t inlen)
978 {
979 static int (*pdecrypt)(EVP_PKEY_CTX *ctx, unsigned char *out,
980 size_t *outlen, const unsigned char *in,
981 size_t inlen);
982
983 if (pdecrypt == NULL)
984 EVP_PKEY_meth_get_decrypt(dasync_rsa_orig, NULL, &pdecrypt);
985 return pdecrypt(ctx, out, outlen, in, inlen);
986 }
987
dasync_rsa_ctrl(EVP_PKEY_CTX * ctx,int type,int p1,void * p2)988 static int dasync_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
989 {
990 static int (*pctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
991
992 if (pctrl == NULL)
993 EVP_PKEY_meth_get_ctrl(dasync_rsa_orig, &pctrl, NULL);
994 return pctrl(ctx, type, p1, p2);
995 }
996
dasync_rsa_ctrl_str(EVP_PKEY_CTX * ctx,const char * type,const char * value)997 static int dasync_rsa_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
998 const char *value)
999 {
1000 static int (*pctrl_str)(EVP_PKEY_CTX *ctx, const char *type,
1001 const char *value);
1002
1003 if (pctrl_str == NULL)
1004 EVP_PKEY_meth_get_ctrl(dasync_rsa_orig, NULL, &pctrl_str);
1005 return pctrl_str(ctx, type, value);
1006 }
1007
