1 /*
2 * Copyright 2015-2021 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 strucures 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_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
143 int arg, void *ptr);
144 static int dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
145 const unsigned char *key,
146 const unsigned char *iv,
147 int enc);
148 static int dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
149 unsigned char *out,
150 const unsigned char *in,
151 size_t inl);
152 static int dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX *ctx);
153
154 struct dasync_pipeline_ctx {
155 void *inner_cipher_data;
156 unsigned int numpipes;
157 unsigned char **inbufs;
158 unsigned char **outbufs;
159 size_t *lens;
160 unsigned char tlsaad[SSL_MAX_PIPELINES][EVP_AEAD_TLS1_AAD_LEN];
161 unsigned int aadctr;
162 };
163
164 /*
165 * Holds the EVP_CIPHER object for aes_128_cbc in this engine. Set up once only
166 * during engine bind and can then be reused many times.
167 */
168 static EVP_CIPHER *_hidden_aes_128_cbc = NULL;
dasync_aes_128_cbc(void)169 static const EVP_CIPHER *dasync_aes_128_cbc(void)
170 {
171 return _hidden_aes_128_cbc;
172 }
173
174 /*
175 * Holds the EVP_CIPHER object for aes_128_cbc_hmac_sha1 in this engine. Set up
176 * once only during engine bind and can then be reused many times.
177 *
178 * This 'stitched' cipher depends on the EVP_aes_128_cbc_hmac_sha1() cipher,
179 * which is implemented only if the AES-NI instruction set extension is available
180 * (see OPENSSL_IA32CAP(3)). If that's not the case, then this cipher will not
181 * be available either.
182 *
183 * Note: Since it is a legacy mac-then-encrypt cipher, modern TLS peers (which
184 * negotiate the encrypt-then-mac extension) won't negotiate it anyway.
185 */
186 static EVP_CIPHER *_hidden_aes_128_cbc_hmac_sha1 = NULL;
dasync_aes_128_cbc_hmac_sha1(void)187 static const EVP_CIPHER *dasync_aes_128_cbc_hmac_sha1(void)
188 {
189 return _hidden_aes_128_cbc_hmac_sha1;
190 }
191
destroy_ciphers(void)192 static void destroy_ciphers(void)
193 {
194 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
195 EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1);
196 _hidden_aes_128_cbc = NULL;
197 _hidden_aes_128_cbc_hmac_sha1 = NULL;
198 }
199
200 static int dasync_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
201 const int **nids, int nid);
202
203 static int dasync_cipher_nids[] = {
204 NID_aes_128_cbc,
205 NID_aes_128_cbc_hmac_sha1,
206 0
207 };
208
bind_dasync(ENGINE * e)209 static int bind_dasync(ENGINE *e)
210 {
211 /* Setup RSA */
212 ;
213 if ((dasync_rsa_orig = EVP_PKEY_meth_find(EVP_PKEY_RSA)) == NULL
214 || (dasync_rsa = EVP_PKEY_meth_new(EVP_PKEY_RSA, 0)) == NULL)
215 return 0;
216 EVP_PKEY_meth_set_init(dasync_rsa, dasync_rsa_init);
217 EVP_PKEY_meth_set_cleanup(dasync_rsa, dasync_rsa_cleanup);
218 EVP_PKEY_meth_set_paramgen(dasync_rsa, dasync_rsa_paramgen_init,
219 dasync_rsa_paramgen);
220 EVP_PKEY_meth_set_keygen(dasync_rsa, dasync_rsa_keygen_init,
221 dasync_rsa_keygen);
222 EVP_PKEY_meth_set_encrypt(dasync_rsa, dasync_rsa_encrypt_init,
223 dasync_rsa_encrypt);
224 EVP_PKEY_meth_set_decrypt(dasync_rsa, dasync_rsa_decrypt_init,
225 dasync_rsa_decrypt);
226 EVP_PKEY_meth_set_ctrl(dasync_rsa, dasync_rsa_ctrl,
227 dasync_rsa_ctrl_str);
228
229 /* Ensure the dasync error handling is set up */
230 ERR_load_DASYNC_strings();
231
232 if (!ENGINE_set_id(e, engine_dasync_id)
233 || !ENGINE_set_name(e, engine_dasync_name)
234 || !ENGINE_set_pkey_meths(e, dasync_pkey)
235 || !ENGINE_set_digests(e, dasync_digests)
236 || !ENGINE_set_ciphers(e, dasync_ciphers)
237 || !ENGINE_set_destroy_function(e, dasync_destroy)
238 || !ENGINE_set_init_function(e, dasync_init)
239 || !ENGINE_set_finish_function(e, dasync_finish)) {
240 DASYNCerr(DASYNC_F_BIND_DASYNC, DASYNC_R_INIT_FAILED);
241 return 0;
242 }
243
244 /*
245 * Set up the EVP_CIPHER and EVP_MD objects for the ciphers/digests
246 * supplied by this engine
247 */
248 _hidden_sha1_md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption);
249 if (_hidden_sha1_md == NULL
250 || !EVP_MD_meth_set_result_size(_hidden_sha1_md, SHA_DIGEST_LENGTH)
251 || !EVP_MD_meth_set_input_blocksize(_hidden_sha1_md, SHA_CBLOCK)
252 || !EVP_MD_meth_set_app_datasize(_hidden_sha1_md,
253 sizeof(EVP_MD *) + sizeof(SHA_CTX))
254 || !EVP_MD_meth_set_flags(_hidden_sha1_md, EVP_MD_FLAG_DIGALGID_ABSENT)
255 || !EVP_MD_meth_set_init(_hidden_sha1_md, dasync_sha1_init)
256 || !EVP_MD_meth_set_update(_hidden_sha1_md, dasync_sha1_update)
257 || !EVP_MD_meth_set_final(_hidden_sha1_md, dasync_sha1_final)) {
258 EVP_MD_meth_free(_hidden_sha1_md);
259 _hidden_sha1_md = NULL;
260 }
261
262 _hidden_aes_128_cbc = EVP_CIPHER_meth_new(NID_aes_128_cbc,
263 16 /* block size */,
264 16 /* key len */);
265 if (_hidden_aes_128_cbc == NULL
266 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc,16)
267 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc,
268 EVP_CIPH_FLAG_DEFAULT_ASN1
269 | EVP_CIPH_CBC_MODE
270 | EVP_CIPH_FLAG_PIPELINE)
271 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc,
272 dasync_aes128_init_key)
273 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc,
274 dasync_aes128_cbc_cipher)
275 || !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc,
276 dasync_aes128_cbc_cleanup)
277 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_cbc,
278 dasync_aes128_cbc_ctrl)
279 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc,
280 sizeof(struct dasync_pipeline_ctx))) {
281 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
282 _hidden_aes_128_cbc = NULL;
283 }
284
285 _hidden_aes_128_cbc_hmac_sha1 = EVP_CIPHER_meth_new(
286 NID_aes_128_cbc_hmac_sha1,
287 16 /* block size */,
288 16 /* key len */);
289 if (_hidden_aes_128_cbc_hmac_sha1 == NULL
290 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc_hmac_sha1,16)
291 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc_hmac_sha1,
292 EVP_CIPH_CBC_MODE
293 | EVP_CIPH_FLAG_DEFAULT_ASN1
294 | EVP_CIPH_FLAG_AEAD_CIPHER
295 | EVP_CIPH_FLAG_PIPELINE)
296 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc_hmac_sha1,
297 dasync_aes128_cbc_hmac_sha1_init_key)
298 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc_hmac_sha1,
299 dasync_aes128_cbc_hmac_sha1_cipher)
300 || !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc_hmac_sha1,
301 dasync_aes128_cbc_hmac_sha1_cleanup)
302 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_cbc_hmac_sha1,
303 dasync_aes128_cbc_hmac_sha1_ctrl)
304 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc_hmac_sha1,
305 sizeof(struct dasync_pipeline_ctx))) {
306 EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1);
307 _hidden_aes_128_cbc_hmac_sha1 = NULL;
308 }
309
310 return 1;
311 }
312
destroy_pkey(void)313 static void destroy_pkey(void)
314 {
315 EVP_PKEY_meth_free(dasync_rsa);
316 dasync_rsa_orig = NULL;
317 dasync_rsa = NULL;
318 }
319
320 # ifndef OPENSSL_NO_DYNAMIC_ENGINE
bind_helper(ENGINE * e,const char * id)321 static int bind_helper(ENGINE *e, const char *id)
322 {
323 if (id && (strcmp(id, engine_dasync_id) != 0))
324 return 0;
325 if (!bind_dasync(e))
326 return 0;
327 return 1;
328 }
329
330 IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)331 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
332 # endif
333
334 static ENGINE *engine_dasync(void)
335 {
336 ENGINE *ret = ENGINE_new();
337 if (!ret)
338 return NULL;
339 if (!bind_dasync(ret)) {
340 ENGINE_free(ret);
341 return NULL;
342 }
343 return ret;
344 }
345
engine_load_dasync_int(void)346 void engine_load_dasync_int(void)
347 {
348 ENGINE *toadd = engine_dasync();
349 if (!toadd)
350 return;
351 ERR_set_mark();
352 ENGINE_add(toadd);
353 /*
354 * If the "add" worked, it gets a structural reference. So either way, we
355 * release our just-created reference.
356 */
357 ENGINE_free(toadd);
358 /*
359 * If the "add" didn't work, it was probably a conflict because it was
360 * already added (eg. someone calling ENGINE_load_blah then calling
361 * ENGINE_load_builtin_engines() perhaps).
362 */
363 ERR_pop_to_mark();
364 }
365
dasync_init(ENGINE * e)366 static int dasync_init(ENGINE *e)
367 {
368 return 1;
369 }
370
371
dasync_finish(ENGINE * e)372 static int dasync_finish(ENGINE *e)
373 {
374 return 1;
375 }
376
377
dasync_destroy(ENGINE * e)378 static int dasync_destroy(ENGINE *e)
379 {
380 destroy_digests();
381 destroy_ciphers();
382 destroy_pkey();
383 ERR_unload_DASYNC_strings();
384 return 1;
385 }
386
dasync_pkey(ENGINE * e,EVP_PKEY_METHOD ** pmeth,const int ** pnids,int nid)387 static int dasync_pkey(ENGINE *e, EVP_PKEY_METHOD **pmeth,
388 const int **pnids, int nid)
389 {
390 static const int rnid = EVP_PKEY_RSA;
391
392 if (pmeth == NULL) {
393 *pnids = &rnid;
394 return 1;
395 }
396
397 if (nid == EVP_PKEY_RSA) {
398 *pmeth = dasync_rsa;
399 return 1;
400 }
401
402 *pmeth = NULL;
403 return 0;
404 }
405
dasync_digests(ENGINE * e,const EVP_MD ** digest,const int ** nids,int nid)406 static int dasync_digests(ENGINE *e, const EVP_MD **digest,
407 const int **nids, int nid)
408 {
409 int ok = 1;
410 if (!digest) {
411 /* We are returning a list of supported nids */
412 return dasync_digest_nids(nids);
413 }
414 /* We are being asked for a specific digest */
415 switch (nid) {
416 case NID_sha1:
417 *digest = dasync_sha1();
418 break;
419 default:
420 ok = 0;
421 *digest = NULL;
422 break;
423 }
424 return ok;
425 }
426
dasync_ciphers(ENGINE * e,const EVP_CIPHER ** cipher,const int ** nids,int nid)427 static int dasync_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
428 const int **nids, int nid)
429 {
430 int ok = 1;
431 if (cipher == NULL) {
432 /* We are returning a list of supported nids */
433 *nids = dasync_cipher_nids;
434 return (sizeof(dasync_cipher_nids) -
435 1) / sizeof(dasync_cipher_nids[0]);
436 }
437 /* We are being asked for a specific cipher */
438 switch (nid) {
439 case NID_aes_128_cbc:
440 *cipher = dasync_aes_128_cbc();
441 break;
442 case NID_aes_128_cbc_hmac_sha1:
443 *cipher = dasync_aes_128_cbc_hmac_sha1();
444 break;
445 default:
446 ok = 0;
447 *cipher = NULL;
448 break;
449 }
450 return ok;
451 }
452
wait_cleanup(ASYNC_WAIT_CTX * ctx,const void * key,OSSL_ASYNC_FD readfd,void * pvwritefd)453 static void wait_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
454 OSSL_ASYNC_FD readfd, void *pvwritefd)
455 {
456 OSSL_ASYNC_FD *pwritefd = (OSSL_ASYNC_FD *)pvwritefd;
457 #if defined(ASYNC_WIN)
458 CloseHandle(readfd);
459 CloseHandle(*pwritefd);
460 #elif defined(ASYNC_POSIX)
461 close(readfd);
462 close(*pwritefd);
463 #endif
464 OPENSSL_free(pwritefd);
465 }
466
467 #define DUMMY_CHAR 'X'
468
dummy_pause_job(void)469 static void dummy_pause_job(void) {
470 ASYNC_JOB *job;
471 ASYNC_WAIT_CTX *waitctx;
472 ASYNC_callback_fn callback;
473 void * callback_arg;
474 OSSL_ASYNC_FD pipefds[2] = {0, 0};
475 OSSL_ASYNC_FD *writefd;
476 #if defined(ASYNC_WIN)
477 DWORD numwritten, numread;
478 char buf = DUMMY_CHAR;
479 #elif defined(ASYNC_POSIX)
480 char buf = DUMMY_CHAR;
481 #endif
482
483 if ((job = ASYNC_get_current_job()) == NULL)
484 return;
485
486 waitctx = ASYNC_get_wait_ctx(job);
487
488 if (ASYNC_WAIT_CTX_get_callback(waitctx, &callback, &callback_arg) && callback != NULL) {
489 /*
490 * In the Dummy async engine we are cheating. We call the callback that the job
491 * is complete before the call to ASYNC_pause_job(). A real
492 * async engine would only call the callback when the job was actually complete
493 */
494 (*callback)(callback_arg);
495 ASYNC_pause_job();
496 return;
497 }
498
499
500 if (ASYNC_WAIT_CTX_get_fd(waitctx, engine_dasync_id, &pipefds[0],
501 (void **)&writefd)) {
502 pipefds[1] = *writefd;
503 } else {
504 writefd = OPENSSL_malloc(sizeof(*writefd));
505 if (writefd == NULL)
506 return;
507 #if defined(ASYNC_WIN)
508 if (CreatePipe(&pipefds[0], &pipefds[1], NULL, 256) == 0) {
509 OPENSSL_free(writefd);
510 return;
511 }
512 #elif defined(ASYNC_POSIX)
513 if (pipe(pipefds) != 0) {
514 OPENSSL_free(writefd);
515 return;
516 }
517 #endif
518 *writefd = pipefds[1];
519
520 if (!ASYNC_WAIT_CTX_set_wait_fd(waitctx, engine_dasync_id, pipefds[0],
521 writefd, wait_cleanup)) {
522 wait_cleanup(waitctx, engine_dasync_id, pipefds[0], writefd);
523 return;
524 }
525 }
526 /*
527 * In the Dummy async engine we are cheating. We signal that the job
528 * is complete by waking it before the call to ASYNC_pause_job(). A real
529 * async engine would only wake when the job was actually complete
530 */
531 #if defined(ASYNC_WIN)
532 WriteFile(pipefds[1], &buf, 1, &numwritten, NULL);
533 #elif defined(ASYNC_POSIX)
534 if (write(pipefds[1], &buf, 1) < 0)
535 return;
536 #endif
537
538 /* Ignore errors - we carry on anyway */
539 ASYNC_pause_job();
540
541 /* Clear the wake signal */
542 #if defined(ASYNC_WIN)
543 ReadFile(pipefds[0], &buf, 1, &numread, NULL);
544 #elif defined(ASYNC_POSIX)
545 if (read(pipefds[0], &buf, 1) < 0)
546 return;
547 #endif
548 }
549
550 /*
551 * SHA1 implementation. At the moment we just defer to the standard
552 * implementation
553 */
dasync_sha1_init(EVP_MD_CTX * ctx)554 static int dasync_sha1_init(EVP_MD_CTX *ctx)
555 {
556 dummy_pause_job();
557
558 return EVP_MD_meth_get_init(EVP_sha1())(ctx);
559 }
560
dasync_sha1_update(EVP_MD_CTX * ctx,const void * data,size_t count)561 static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
562 size_t count)
563 {
564 dummy_pause_job();
565
566 return EVP_MD_meth_get_update(EVP_sha1())(ctx, data, count);
567 }
568
dasync_sha1_final(EVP_MD_CTX * ctx,unsigned char * md)569 static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
570 {
571 dummy_pause_job();
572
573 return EVP_MD_meth_get_final(EVP_sha1())(ctx, md);
574 }
575
576 /* Cipher helper functions */
577
dasync_cipher_ctrl_helper(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr,int aeadcapable)578 static int dasync_cipher_ctrl_helper(EVP_CIPHER_CTX *ctx, int type, int arg,
579 void *ptr, int aeadcapable)
580 {
581 int ret;
582 struct dasync_pipeline_ctx *pipe_ctx =
583 (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
584
585 if (pipe_ctx == NULL)
586 return 0;
587
588 switch (type) {
589 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS:
590 pipe_ctx->numpipes = arg;
591 pipe_ctx->outbufs = (unsigned char **)ptr;
592 break;
593
594 case EVP_CTRL_SET_PIPELINE_INPUT_BUFS:
595 pipe_ctx->numpipes = arg;
596 pipe_ctx->inbufs = (unsigned char **)ptr;
597 break;
598
599 case EVP_CTRL_SET_PIPELINE_INPUT_LENS:
600 pipe_ctx->numpipes = arg;
601 pipe_ctx->lens = (size_t *)ptr;
602 break;
603
604 case EVP_CTRL_AEAD_SET_MAC_KEY:
605 if (!aeadcapable)
606 return -1;
607 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
608 ret = EVP_CIPHER_meth_get_ctrl(EVP_aes_128_cbc_hmac_sha1())
609 (ctx, type, arg, ptr);
610 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
611 return ret;
612
613 case EVP_CTRL_AEAD_TLS1_AAD:
614 {
615 unsigned char *p = ptr;
616 unsigned int len;
617
618 if (!aeadcapable || arg != EVP_AEAD_TLS1_AAD_LEN)
619 return -1;
620
621 if (pipe_ctx->aadctr >= SSL_MAX_PIPELINES)
622 return -1;
623
624 memcpy(pipe_ctx->tlsaad[pipe_ctx->aadctr], ptr,
625 EVP_AEAD_TLS1_AAD_LEN);
626 pipe_ctx->aadctr++;
627
628 len = p[arg - 2] << 8 | p[arg - 1];
629
630 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
631 if ((p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
632 if (len < AES_BLOCK_SIZE)
633 return 0;
634 len -= AES_BLOCK_SIZE;
635 }
636
637 return ((len + SHA_DIGEST_LENGTH + AES_BLOCK_SIZE)
638 & -AES_BLOCK_SIZE) - len;
639 } else {
640 return SHA_DIGEST_LENGTH;
641 }
642 }
643
644 default:
645 return 0;
646 }
647
648 return 1;
649 }
650
dasync_cipher_init_key_helper(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc,const EVP_CIPHER * cipher)651 static int dasync_cipher_init_key_helper(EVP_CIPHER_CTX *ctx,
652 const unsigned char *key,
653 const unsigned char *iv, int enc,
654 const EVP_CIPHER *cipher)
655 {
656 int ret;
657 struct dasync_pipeline_ctx *pipe_ctx =
658 (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
659
660 if (pipe_ctx->inner_cipher_data == NULL
661 && EVP_CIPHER_impl_ctx_size(cipher) != 0) {
662 pipe_ctx->inner_cipher_data = OPENSSL_zalloc(
663 EVP_CIPHER_impl_ctx_size(cipher));
664 if (pipe_ctx->inner_cipher_data == NULL) {
665 DASYNCerr(DASYNC_F_DASYNC_CIPHER_INIT_KEY_HELPER,
666 ERR_R_MALLOC_FAILURE);
667 return 0;
668 }
669 }
670
671 pipe_ctx->numpipes = 0;
672 pipe_ctx->aadctr = 0;
673
674 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
675 ret = EVP_CIPHER_meth_get_init(cipher)(ctx, key, iv, enc);
676 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
677
678 return ret;
679 }
680
dasync_cipher_helper(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl,const EVP_CIPHER * cipher)681 static int dasync_cipher_helper(EVP_CIPHER_CTX *ctx, unsigned char *out,
682 const unsigned char *in, size_t inl,
683 const EVP_CIPHER *cipher)
684 {
685 int ret = 1;
686 unsigned int i, pipes;
687 struct dasync_pipeline_ctx *pipe_ctx =
688 (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
689
690 pipes = pipe_ctx->numpipes;
691 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
692 if (pipes == 0) {
693 if (pipe_ctx->aadctr != 0) {
694 if (pipe_ctx->aadctr != 1)
695 return -1;
696 EVP_CIPHER_meth_get_ctrl(cipher)
697 (ctx, EVP_CTRL_AEAD_TLS1_AAD,
698 EVP_AEAD_TLS1_AAD_LEN,
699 pipe_ctx->tlsaad[0]);
700 }
701 ret = EVP_CIPHER_meth_get_do_cipher(cipher)
702 (ctx, out, in, inl);
703 } else {
704 if (pipe_ctx->aadctr > 0 && pipe_ctx->aadctr != pipes)
705 return -1;
706 for (i = 0; i < pipes; i++) {
707 if (pipe_ctx->aadctr > 0) {
708 EVP_CIPHER_meth_get_ctrl(cipher)
709 (ctx, EVP_CTRL_AEAD_TLS1_AAD,
710 EVP_AEAD_TLS1_AAD_LEN,
711 pipe_ctx->tlsaad[i]);
712 }
713 ret = ret && EVP_CIPHER_meth_get_do_cipher(cipher)
714 (ctx, pipe_ctx->outbufs[i], pipe_ctx->inbufs[i],
715 pipe_ctx->lens[i]);
716 }
717 pipe_ctx->numpipes = 0;
718 }
719 pipe_ctx->aadctr = 0;
720 EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
721 return ret;
722 }
723
dasync_cipher_cleanup_helper(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher)724 static int dasync_cipher_cleanup_helper(EVP_CIPHER_CTX *ctx,
725 const EVP_CIPHER *cipher)
726 {
727 struct dasync_pipeline_ctx *pipe_ctx =
728 (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
729
730 OPENSSL_clear_free(pipe_ctx->inner_cipher_data,
731 EVP_CIPHER_impl_ctx_size(cipher));
732
733 return 1;
734 }
735
736 /*
737 * AES128 CBC Implementation
738 */
739
dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)740 static int dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
741 void *ptr)
742 {
743 return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 0);
744 }
745
dasync_aes128_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)746 static int dasync_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
747 const unsigned char *iv, int enc)
748 {
749 return dasync_cipher_init_key_helper(ctx, key, iv, enc, EVP_aes_128_cbc());
750 }
751
dasync_aes128_cbc_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)752 static int dasync_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
753 const unsigned char *in, size_t inl)
754 {
755 return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_128_cbc());
756 }
757
dasync_aes128_cbc_cleanup(EVP_CIPHER_CTX * ctx)758 static int dasync_aes128_cbc_cleanup(EVP_CIPHER_CTX *ctx)
759 {
760 return dasync_cipher_cleanup_helper(ctx, EVP_aes_128_cbc());
761 }
762
763
764 /*
765 * AES128 CBC HMAC SHA1 Implementation
766 */
767
dasync_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)768 static int dasync_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
769 int arg, void *ptr)
770 {
771 return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 1);
772 }
773
dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)774 static int dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
775 const unsigned char *key,
776 const unsigned char *iv,
777 int enc)
778 {
779 /*
780 * We can safely assume that EVP_aes_128_cbc_hmac_sha1() != NULL,
781 * see comment before the definition of dasync_aes_128_cbc_hmac_sha1().
782 */
783 return dasync_cipher_init_key_helper(ctx, key, iv, enc,
784 EVP_aes_128_cbc_hmac_sha1());
785 }
786
dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)787 static int dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
788 unsigned char *out,
789 const unsigned char *in,
790 size_t inl)
791 {
792 return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_128_cbc_hmac_sha1());
793 }
794
dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX * ctx)795 static int dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX *ctx)
796 {
797 /*
798 * We can safely assume that EVP_aes_128_cbc_hmac_sha1() != NULL,
799 * see comment before the definition of dasync_aes_128_cbc_hmac_sha1().
800 */
801 return dasync_cipher_cleanup_helper(ctx, EVP_aes_128_cbc_hmac_sha1());
802 }
803
804
805 /*
806 * RSA implementation
807 */
dasync_rsa_init(EVP_PKEY_CTX * ctx)808 static int dasync_rsa_init(EVP_PKEY_CTX *ctx)
809 {
810 static int (*pinit)(EVP_PKEY_CTX *ctx);
811
812 if (pinit == NULL)
813 EVP_PKEY_meth_get_init(dasync_rsa_orig, &pinit);
814 return pinit(ctx);
815 }
816
dasync_rsa_cleanup(EVP_PKEY_CTX * ctx)817 static void dasync_rsa_cleanup(EVP_PKEY_CTX *ctx)
818 {
819 static void (*pcleanup)(EVP_PKEY_CTX *ctx);
820
821 if (pcleanup == NULL)
822 EVP_PKEY_meth_get_cleanup(dasync_rsa_orig, &pcleanup);
823 pcleanup(ctx);
824 }
825
dasync_rsa_paramgen_init(EVP_PKEY_CTX * ctx)826 static int dasync_rsa_paramgen_init(EVP_PKEY_CTX *ctx)
827 {
828 static int (*pparamgen_init)(EVP_PKEY_CTX *ctx);
829
830 if (pparamgen_init == NULL)
831 EVP_PKEY_meth_get_paramgen(dasync_rsa_orig, &pparamgen_init, NULL);
832 return pparamgen_init(ctx);
833 }
834
dasync_rsa_paramgen(EVP_PKEY_CTX * ctx,EVP_PKEY * pkey)835 static int dasync_rsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
836 {
837 static int (*pparamgen)(EVP_PKEY_CTX *c, EVP_PKEY *pkey);
838
839 if (pparamgen == NULL)
840 EVP_PKEY_meth_get_paramgen(dasync_rsa_orig, NULL, &pparamgen);
841 return pparamgen(ctx, pkey);
842 }
843
dasync_rsa_keygen_init(EVP_PKEY_CTX * ctx)844 static int dasync_rsa_keygen_init(EVP_PKEY_CTX *ctx)
845 {
846 static int (*pkeygen_init)(EVP_PKEY_CTX *ctx);
847
848 if (pkeygen_init == NULL)
849 EVP_PKEY_meth_get_keygen(dasync_rsa_orig, &pkeygen_init, NULL);
850 return pkeygen_init(ctx);
851 }
852
dasync_rsa_keygen(EVP_PKEY_CTX * ctx,EVP_PKEY * pkey)853 static int dasync_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
854 {
855 static int (*pkeygen)(EVP_PKEY_CTX *c, EVP_PKEY *pkey);
856
857 if (pkeygen == NULL)
858 EVP_PKEY_meth_get_keygen(dasync_rsa_orig, NULL, &pkeygen);
859 return pkeygen(ctx, pkey);
860 }
861
dasync_rsa_encrypt_init(EVP_PKEY_CTX * ctx)862 static int dasync_rsa_encrypt_init(EVP_PKEY_CTX *ctx)
863 {
864 static int (*pencrypt_init)(EVP_PKEY_CTX *ctx);
865
866 if (pencrypt_init == NULL)
867 EVP_PKEY_meth_get_encrypt(dasync_rsa_orig, &pencrypt_init, NULL);
868 return pencrypt_init(ctx);
869 }
870
dasync_rsa_encrypt(EVP_PKEY_CTX * ctx,unsigned char * out,size_t * outlen,const unsigned char * in,size_t inlen)871 static int dasync_rsa_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
872 size_t *outlen, const unsigned char *in,
873 size_t inlen)
874 {
875 static int (*pencryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out,
876 size_t *outlen, const unsigned char *in,
877 size_t inlen);
878
879 if (pencryptfn == NULL)
880 EVP_PKEY_meth_get_encrypt(dasync_rsa_orig, NULL, &pencryptfn);
881 return pencryptfn(ctx, out, outlen, in, inlen);
882 }
883
dasync_rsa_decrypt_init(EVP_PKEY_CTX * ctx)884 static int dasync_rsa_decrypt_init(EVP_PKEY_CTX *ctx)
885 {
886 static int (*pdecrypt_init)(EVP_PKEY_CTX *ctx);
887
888 if (pdecrypt_init == NULL)
889 EVP_PKEY_meth_get_decrypt(dasync_rsa_orig, &pdecrypt_init, NULL);
890 return pdecrypt_init(ctx);
891 }
892
dasync_rsa_decrypt(EVP_PKEY_CTX * ctx,unsigned char * out,size_t * outlen,const unsigned char * in,size_t inlen)893 static int dasync_rsa_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out,
894 size_t *outlen, const unsigned char *in,
895 size_t inlen)
896 {
897 static int (*pdecrypt)(EVP_PKEY_CTX *ctx, unsigned char *out,
898 size_t *outlen, const unsigned char *in,
899 size_t inlen);
900
901 if (pdecrypt == NULL)
902 EVP_PKEY_meth_get_encrypt(dasync_rsa_orig, NULL, &pdecrypt);
903 return pdecrypt(ctx, out, outlen, in, inlen);
904 }
905
dasync_rsa_ctrl(EVP_PKEY_CTX * ctx,int type,int p1,void * p2)906 static int dasync_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
907 {
908 static int (*pctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
909
910 if (pctrl == NULL)
911 EVP_PKEY_meth_get_ctrl(dasync_rsa_orig, &pctrl, NULL);
912 return pctrl(ctx, type, p1, p2);
913 }
914
dasync_rsa_ctrl_str(EVP_PKEY_CTX * ctx,const char * type,const char * value)915 static int dasync_rsa_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
916 const char *value)
917 {
918 static int (*pctrl_str)(EVP_PKEY_CTX *ctx, const char *type,
919 const char *value);
920
921 if (pctrl_str == NULL)
922 EVP_PKEY_meth_get_ctrl(dasync_rsa_orig, NULL, &pctrl_str);
923 return pctrl_str(ctx, type, value);
924 }
925