1 /*
2 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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 /*
11 * This is the OSSLTEST engine. It provides deliberately crippled digest
12 * implementations for test purposes. It is highly insecure and must NOT be
13 * used for any purpose except testing
14 */
15
16 #include <stdio.h>
17 #include <string.h>
18
19 #include <openssl/engine.h>
20 #include <openssl/sha.h>
21 #include <openssl/md5.h>
22 #include <openssl/rsa.h>
23 #include <openssl/evp.h>
24 #include <openssl/modes.h>
25 #include <openssl/aes.h>
26 #include <openssl/rand.h>
27 #include <openssl/crypto.h>
28
29 #include "e_ossltest_err.c"
30
31 /* Engine Id and Name */
32 static const char *engine_ossltest_id = "ossltest";
33 static const char *engine_ossltest_name = "OpenSSL Test engine support";
34
35
36 /* Engine Lifetime functions */
37 static int ossltest_destroy(ENGINE *e);
38 static int ossltest_init(ENGINE *e);
39 static int ossltest_finish(ENGINE *e);
40 void ENGINE_load_ossltest(void);
41
42
43 /* Set up digests */
44 static int ossltest_digests(ENGINE *e, const EVP_MD **digest,
45 const int **nids, int nid);
46 static const RAND_METHOD *ossltest_rand_method(void);
47
48 /* MD5 */
49 static int digest_md5_init(EVP_MD_CTX *ctx);
50 static int digest_md5_update(EVP_MD_CTX *ctx, const void *data,
51 size_t count);
52 static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md);
53
54 static EVP_MD *_hidden_md5_md = NULL;
digest_md5(void)55 static const EVP_MD *digest_md5(void)
56 {
57 if (_hidden_md5_md == NULL) {
58 EVP_MD *md;
59
60 if ((md = EVP_MD_meth_new(NID_md5, NID_md5WithRSAEncryption)) == NULL
61 || !EVP_MD_meth_set_result_size(md, MD5_DIGEST_LENGTH)
62 || !EVP_MD_meth_set_input_blocksize(md, MD5_CBLOCK)
63 || !EVP_MD_meth_set_app_datasize(md,
64 sizeof(EVP_MD *) + sizeof(MD5_CTX))
65 || !EVP_MD_meth_set_flags(md, 0)
66 || !EVP_MD_meth_set_init(md, digest_md5_init)
67 || !EVP_MD_meth_set_update(md, digest_md5_update)
68 || !EVP_MD_meth_set_final(md, digest_md5_final)) {
69 EVP_MD_meth_free(md);
70 md = NULL;
71 }
72 _hidden_md5_md = md;
73 }
74 return _hidden_md5_md;
75 }
76
77 /* SHA1 */
78 static int digest_sha1_init(EVP_MD_CTX *ctx);
79 static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data,
80 size_t count);
81 static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md);
82
83 static EVP_MD *_hidden_sha1_md = NULL;
digest_sha1(void)84 static const EVP_MD *digest_sha1(void)
85 {
86 if (_hidden_sha1_md == NULL) {
87 EVP_MD *md;
88
89 if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL
90 || !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH)
91 || !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK)
92 || !EVP_MD_meth_set_app_datasize(md,
93 sizeof(EVP_MD *) + sizeof(SHA_CTX))
94 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
95 || !EVP_MD_meth_set_init(md, digest_sha1_init)
96 || !EVP_MD_meth_set_update(md, digest_sha1_update)
97 || !EVP_MD_meth_set_final(md, digest_sha1_final)) {
98 EVP_MD_meth_free(md);
99 md = NULL;
100 }
101 _hidden_sha1_md = md;
102 }
103 return _hidden_sha1_md;
104 }
105
106 /* SHA256 */
107 static int digest_sha256_init(EVP_MD_CTX *ctx);
108 static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data,
109 size_t count);
110 static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md);
111
112 static EVP_MD *_hidden_sha256_md = NULL;
digest_sha256(void)113 static const EVP_MD *digest_sha256(void)
114 {
115 if (_hidden_sha256_md == NULL) {
116 EVP_MD *md;
117
118 if ((md = EVP_MD_meth_new(NID_sha256, NID_sha256WithRSAEncryption)) == NULL
119 || !EVP_MD_meth_set_result_size(md, SHA256_DIGEST_LENGTH)
120 || !EVP_MD_meth_set_input_blocksize(md, SHA256_CBLOCK)
121 || !EVP_MD_meth_set_app_datasize(md,
122 sizeof(EVP_MD *) + sizeof(SHA256_CTX))
123 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
124 || !EVP_MD_meth_set_init(md, digest_sha256_init)
125 || !EVP_MD_meth_set_update(md, digest_sha256_update)
126 || !EVP_MD_meth_set_final(md, digest_sha256_final)) {
127 EVP_MD_meth_free(md);
128 md = NULL;
129 }
130 _hidden_sha256_md = md;
131 }
132 return _hidden_sha256_md;
133 }
134
135 /* SHA384/SHA512 */
136 static int digest_sha384_init(EVP_MD_CTX *ctx);
137 static int digest_sha512_init(EVP_MD_CTX *ctx);
138 static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data,
139 size_t count);
140 static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md);
141 static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md);
142
143 static EVP_MD *_hidden_sha384_md = NULL;
digest_sha384(void)144 static const EVP_MD *digest_sha384(void)
145 {
146 if (_hidden_sha384_md == NULL) {
147 EVP_MD *md;
148
149 if ((md = EVP_MD_meth_new(NID_sha384, NID_sha384WithRSAEncryption)) == NULL
150 || !EVP_MD_meth_set_result_size(md, SHA384_DIGEST_LENGTH)
151 || !EVP_MD_meth_set_input_blocksize(md, SHA512_CBLOCK)
152 || !EVP_MD_meth_set_app_datasize(md,
153 sizeof(EVP_MD *) + sizeof(SHA512_CTX))
154 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
155 || !EVP_MD_meth_set_init(md, digest_sha384_init)
156 || !EVP_MD_meth_set_update(md, digest_sha512_update)
157 || !EVP_MD_meth_set_final(md, digest_sha384_final)) {
158 EVP_MD_meth_free(md);
159 md = NULL;
160 }
161 _hidden_sha384_md = md;
162 }
163 return _hidden_sha384_md;
164 }
165 static EVP_MD *_hidden_sha512_md = NULL;
digest_sha512(void)166 static const EVP_MD *digest_sha512(void)
167 {
168 if (_hidden_sha512_md == NULL) {
169 EVP_MD *md;
170
171 if ((md = EVP_MD_meth_new(NID_sha512, NID_sha512WithRSAEncryption)) == NULL
172 || !EVP_MD_meth_set_result_size(md, SHA512_DIGEST_LENGTH)
173 || !EVP_MD_meth_set_input_blocksize(md, SHA512_CBLOCK)
174 || !EVP_MD_meth_set_app_datasize(md,
175 sizeof(EVP_MD *) + sizeof(SHA512_CTX))
176 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
177 || !EVP_MD_meth_set_init(md, digest_sha512_init)
178 || !EVP_MD_meth_set_update(md, digest_sha512_update)
179 || !EVP_MD_meth_set_final(md, digest_sha512_final)) {
180 EVP_MD_meth_free(md);
181 md = NULL;
182 }
183 _hidden_sha512_md = md;
184 }
185 return _hidden_sha512_md;
186 }
destroy_digests(void)187 static void destroy_digests(void)
188 {
189 EVP_MD_meth_free(_hidden_md5_md);
190 _hidden_md5_md = NULL;
191 EVP_MD_meth_free(_hidden_sha1_md);
192 _hidden_sha1_md = NULL;
193 EVP_MD_meth_free(_hidden_sha256_md);
194 _hidden_sha256_md = NULL;
195 EVP_MD_meth_free(_hidden_sha384_md);
196 _hidden_sha384_md = NULL;
197 EVP_MD_meth_free(_hidden_sha512_md);
198 _hidden_sha512_md = NULL;
199 }
ossltest_digest_nids(const int ** nids)200 static int ossltest_digest_nids(const int **nids)
201 {
202 static int digest_nids[6] = { 0, 0, 0, 0, 0, 0 };
203 static int pos = 0;
204 static int init = 0;
205
206 if (!init) {
207 const EVP_MD *md;
208 if ((md = digest_md5()) != NULL)
209 digest_nids[pos++] = EVP_MD_type(md);
210 if ((md = digest_sha1()) != NULL)
211 digest_nids[pos++] = EVP_MD_type(md);
212 if ((md = digest_sha256()) != NULL)
213 digest_nids[pos++] = EVP_MD_type(md);
214 if ((md = digest_sha384()) != NULL)
215 digest_nids[pos++] = EVP_MD_type(md);
216 if ((md = digest_sha512()) != NULL)
217 digest_nids[pos++] = EVP_MD_type(md);
218 digest_nids[pos] = 0;
219 init = 1;
220 }
221 *nids = digest_nids;
222 return pos;
223 }
224
225 /* Setup ciphers */
226 static int ossltest_ciphers(ENGINE *, const EVP_CIPHER **,
227 const int **, int);
228
229 static int ossltest_cipher_nids[] = {
230 NID_aes_128_cbc, NID_aes_128_gcm, 0
231 };
232
233 /* AES128 */
234
235 int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
236 const unsigned char *iv, int enc);
237 int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
238 const unsigned char *in, size_t inl);
239 int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
240 const unsigned char *iv, int enc);
241 int ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
242 const unsigned char *in, size_t inl);
243 static int ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
244 void *ptr);
245
246 static EVP_CIPHER *_hidden_aes_128_cbc = NULL;
ossltest_aes_128_cbc(void)247 static const EVP_CIPHER *ossltest_aes_128_cbc(void)
248 {
249 if (_hidden_aes_128_cbc == NULL
250 && ((_hidden_aes_128_cbc = EVP_CIPHER_meth_new(NID_aes_128_cbc,
251 16 /* block size */,
252 16 /* key len */)) == NULL
253 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc,16)
254 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc,
255 EVP_CIPH_FLAG_DEFAULT_ASN1
256 | EVP_CIPH_CBC_MODE)
257 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc,
258 ossltest_aes128_init_key)
259 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc,
260 ossltest_aes128_cbc_cipher)
261 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc,
262 EVP_CIPHER_impl_ctx_size(EVP_aes_128_cbc())))) {
263 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
264 _hidden_aes_128_cbc = NULL;
265 }
266 return _hidden_aes_128_cbc;
267 }
268 static EVP_CIPHER *_hidden_aes_128_gcm = NULL;
269
270 #define AES_GCM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
271 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
272 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
273 | EVP_CIPH_CUSTOM_COPY |EVP_CIPH_FLAG_AEAD_CIPHER \
274 | EVP_CIPH_GCM_MODE)
275
ossltest_aes_128_gcm(void)276 static const EVP_CIPHER *ossltest_aes_128_gcm(void)
277 {
278 if (_hidden_aes_128_gcm == NULL
279 && ((_hidden_aes_128_gcm = EVP_CIPHER_meth_new(NID_aes_128_gcm,
280 1 /* block size */,
281 16 /* key len */)) == NULL
282 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_gcm,12)
283 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_gcm, AES_GCM_FLAGS)
284 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_gcm,
285 ossltest_aes128_gcm_init_key)
286 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_gcm,
287 ossltest_aes128_gcm_cipher)
288 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_gcm,
289 ossltest_aes128_gcm_ctrl)
290 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_gcm,
291 EVP_CIPHER_impl_ctx_size(EVP_aes_128_gcm())))) {
292 EVP_CIPHER_meth_free(_hidden_aes_128_gcm);
293 _hidden_aes_128_gcm = NULL;
294 }
295 return _hidden_aes_128_gcm;
296 }
297
destroy_ciphers(void)298 static void destroy_ciphers(void)
299 {
300 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
301 EVP_CIPHER_meth_free(_hidden_aes_128_gcm);
302 _hidden_aes_128_cbc = NULL;
303 }
304
bind_ossltest(ENGINE * e)305 static int bind_ossltest(ENGINE *e)
306 {
307 /* Ensure the ossltest error handling is set up */
308 ERR_load_OSSLTEST_strings();
309
310 if (!ENGINE_set_id(e, engine_ossltest_id)
311 || !ENGINE_set_name(e, engine_ossltest_name)
312 || !ENGINE_set_digests(e, ossltest_digests)
313 || !ENGINE_set_ciphers(e, ossltest_ciphers)
314 || !ENGINE_set_RAND(e, ossltest_rand_method())
315 || !ENGINE_set_destroy_function(e, ossltest_destroy)
316 || !ENGINE_set_init_function(e, ossltest_init)
317 || !ENGINE_set_finish_function(e, ossltest_finish)) {
318 OSSLTESTerr(OSSLTEST_F_BIND_OSSLTEST, OSSLTEST_R_INIT_FAILED);
319 return 0;
320 }
321
322 return 1;
323 }
324
325 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
bind_helper(ENGINE * e,const char * id)326 static int bind_helper(ENGINE *e, const char *id)
327 {
328 if (id && (strcmp(id, engine_ossltest_id) != 0))
329 return 0;
330 if (!bind_ossltest(e))
331 return 0;
332 return 1;
333 }
334
335 IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)336 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
337 #endif
338
339 static ENGINE *engine_ossltest(void)
340 {
341 ENGINE *ret = ENGINE_new();
342 if (ret == NULL)
343 return NULL;
344 if (!bind_ossltest(ret)) {
345 ENGINE_free(ret);
346 return NULL;
347 }
348 return ret;
349 }
350
ENGINE_load_ossltest(void)351 void ENGINE_load_ossltest(void)
352 {
353 /* Copied from eng_[openssl|dyn].c */
354 ENGINE *toadd = engine_ossltest();
355 if (!toadd)
356 return;
357 ENGINE_add(toadd);
358 ENGINE_free(toadd);
359 ERR_clear_error();
360 }
361
362
ossltest_init(ENGINE * e)363 static int ossltest_init(ENGINE *e)
364 {
365 return 1;
366 }
367
368
ossltest_finish(ENGINE * e)369 static int ossltest_finish(ENGINE *e)
370 {
371 return 1;
372 }
373
374
ossltest_destroy(ENGINE * e)375 static int ossltest_destroy(ENGINE *e)
376 {
377 destroy_digests();
378 destroy_ciphers();
379 ERR_unload_OSSLTEST_strings();
380 return 1;
381 }
382
ossltest_digests(ENGINE * e,const EVP_MD ** digest,const int ** nids,int nid)383 static int ossltest_digests(ENGINE *e, const EVP_MD **digest,
384 const int **nids, int nid)
385 {
386 int ok = 1;
387 if (!digest) {
388 /* We are returning a list of supported nids */
389 return ossltest_digest_nids(nids);
390 }
391 /* We are being asked for a specific digest */
392 switch (nid) {
393 case NID_md5:
394 *digest = digest_md5();
395 break;
396 case NID_sha1:
397 *digest = digest_sha1();
398 break;
399 case NID_sha256:
400 *digest = digest_sha256();
401 break;
402 case NID_sha384:
403 *digest = digest_sha384();
404 break;
405 case NID_sha512:
406 *digest = digest_sha512();
407 break;
408 default:
409 ok = 0;
410 *digest = NULL;
411 break;
412 }
413 return ok;
414 }
415
ossltest_ciphers(ENGINE * e,const EVP_CIPHER ** cipher,const int ** nids,int nid)416 static int ossltest_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
417 const int **nids, int nid)
418 {
419 int ok = 1;
420 if (!cipher) {
421 /* We are returning a list of supported nids */
422 *nids = ossltest_cipher_nids;
423 return (sizeof(ossltest_cipher_nids) - 1)
424 / sizeof(ossltest_cipher_nids[0]);
425 }
426 /* We are being asked for a specific cipher */
427 switch (nid) {
428 case NID_aes_128_cbc:
429 *cipher = ossltest_aes_128_cbc();
430 break;
431 case NID_aes_128_gcm:
432 *cipher = ossltest_aes_128_gcm();
433 break;
434 default:
435 ok = 0;
436 *cipher = NULL;
437 break;
438 }
439 return ok;
440 }
441
fill_known_data(unsigned char * md,unsigned int len)442 static void fill_known_data(unsigned char *md, unsigned int len)
443 {
444 unsigned int i;
445
446 for (i=0; i<len; i++) {
447 md[i] = (unsigned char)(i & 0xff);
448 }
449 }
450
451 /*
452 * MD5 implementation. We go through the motions of doing MD5 by deferring to
453 * the standard implementation. Then we overwrite the result with a will defined
454 * value, so that all "MD5" digests using the test engine always end up with
455 * the same value.
456 */
457 #undef data
458 #define data(ctx) ((MD5_CTX *)EVP_MD_CTX_md_data(ctx))
digest_md5_init(EVP_MD_CTX * ctx)459 static int digest_md5_init(EVP_MD_CTX *ctx)
460 {
461 return MD5_Init(data(ctx));
462 }
463
digest_md5_update(EVP_MD_CTX * ctx,const void * data,size_t count)464 static int digest_md5_update(EVP_MD_CTX *ctx, const void *data,
465 size_t count)
466 {
467 return MD5_Update(data(ctx), data, (size_t)count);
468 }
469
digest_md5_final(EVP_MD_CTX * ctx,unsigned char * md)470 static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md)
471 {
472 int ret;
473 ret = MD5_Final(md, data(ctx));
474
475 if (ret > 0) {
476 fill_known_data(md, MD5_DIGEST_LENGTH);
477 }
478 return ret;
479 }
480
481 /*
482 * SHA1 implementation.
483 */
484 #undef data
485 #define data(ctx) ((SHA_CTX *)EVP_MD_CTX_md_data(ctx))
digest_sha1_init(EVP_MD_CTX * ctx)486 static int digest_sha1_init(EVP_MD_CTX *ctx)
487 {
488 return SHA1_Init(data(ctx));
489 }
490
digest_sha1_update(EVP_MD_CTX * ctx,const void * data,size_t count)491 static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data,
492 size_t count)
493 {
494 return SHA1_Update(data(ctx), data, (size_t)count);
495 }
496
digest_sha1_final(EVP_MD_CTX * ctx,unsigned char * md)497 static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
498 {
499 int ret;
500 ret = SHA1_Final(md, data(ctx));
501
502 if (ret > 0) {
503 fill_known_data(md, SHA_DIGEST_LENGTH);
504 }
505 return ret;
506 }
507
508 /*
509 * SHA256 implementation.
510 */
511 #undef data
512 #define data(ctx) ((SHA256_CTX *)EVP_MD_CTX_md_data(ctx))
digest_sha256_init(EVP_MD_CTX * ctx)513 static int digest_sha256_init(EVP_MD_CTX *ctx)
514 {
515 return SHA256_Init(data(ctx));
516 }
517
digest_sha256_update(EVP_MD_CTX * ctx,const void * data,size_t count)518 static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data,
519 size_t count)
520 {
521 return SHA256_Update(data(ctx), data, (size_t)count);
522 }
523
digest_sha256_final(EVP_MD_CTX * ctx,unsigned char * md)524 static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md)
525 {
526 int ret;
527 ret = SHA256_Final(md, data(ctx));
528
529 if (ret > 0) {
530 fill_known_data(md, SHA256_DIGEST_LENGTH);
531 }
532 return ret;
533 }
534
535 /*
536 * SHA384/512 implementation.
537 */
538 #undef data
539 #define data(ctx) ((SHA512_CTX *)EVP_MD_CTX_md_data(ctx))
digest_sha384_init(EVP_MD_CTX * ctx)540 static int digest_sha384_init(EVP_MD_CTX *ctx)
541 {
542 return SHA384_Init(data(ctx));
543 }
544
digest_sha512_init(EVP_MD_CTX * ctx)545 static int digest_sha512_init(EVP_MD_CTX *ctx)
546 {
547 return SHA512_Init(data(ctx));
548 }
549
digest_sha512_update(EVP_MD_CTX * ctx,const void * data,size_t count)550 static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data,
551 size_t count)
552 {
553 return SHA512_Update(data(ctx), data, (size_t)count);
554 }
555
digest_sha384_final(EVP_MD_CTX * ctx,unsigned char * md)556 static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md)
557 {
558 int ret;
559 /* Actually uses SHA512_Final! */
560 ret = SHA512_Final(md, data(ctx));
561
562 if (ret > 0) {
563 fill_known_data(md, SHA384_DIGEST_LENGTH);
564 }
565 return ret;
566 }
567
digest_sha512_final(EVP_MD_CTX * ctx,unsigned char * md)568 static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md)
569 {
570 int ret;
571 ret = SHA512_Final(md, data(ctx));
572
573 if (ret > 0) {
574 fill_known_data(md, SHA512_DIGEST_LENGTH);
575 }
576 return ret;
577 }
578
579 /*
580 * AES128 Implementation
581 */
582
ossltest_aes128_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)583 int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
584 const unsigned char *iv, int enc)
585 {
586 return EVP_CIPHER_meth_get_init(EVP_aes_128_cbc()) (ctx, key, iv, enc);
587 }
588
ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)589 int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
590 const unsigned char *in, size_t inl)
591 {
592 unsigned char *tmpbuf;
593 int ret;
594
595 tmpbuf = OPENSSL_malloc(inl);
596
597 /* OPENSSL_malloc will return NULL if inl == 0 */
598 if (tmpbuf == NULL && inl > 0)
599 return -1;
600
601 /* Remember what we were asked to encrypt */
602 if (tmpbuf != NULL)
603 memcpy(tmpbuf, in, inl);
604
605 /* Go through the motions of encrypting it */
606 ret = EVP_CIPHER_meth_get_do_cipher(EVP_aes_128_cbc())(ctx, out, in, inl);
607
608 /* Throw it all away and just use the plaintext as the output */
609 if (tmpbuf != NULL)
610 memcpy(out, tmpbuf, inl);
611 OPENSSL_free(tmpbuf);
612
613 return ret;
614 }
615
ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)616 int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
617 const unsigned char *iv, int enc)
618 {
619 return EVP_CIPHER_meth_get_init(EVP_aes_128_gcm()) (ctx, key, iv, enc);
620 }
621
622
ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)623 int ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
624 const unsigned char *in, size_t inl)
625 {
626 unsigned char *tmpbuf = OPENSSL_malloc(inl);
627
628 /* OPENSSL_malloc will return NULL if inl == 0 */
629 if (tmpbuf == NULL && inl > 0)
630 return -1;
631
632 /* Remember what we were asked to encrypt */
633 if (tmpbuf != NULL)
634 memcpy(tmpbuf, in, inl);
635
636 /* Go through the motions of encrypting it */
637 EVP_CIPHER_meth_get_do_cipher(EVP_aes_128_gcm())(ctx, out, in, inl);
638
639 /* Throw it all away and just use the plaintext as the output */
640 if (tmpbuf != NULL && out != NULL)
641 memcpy(out, tmpbuf, inl);
642 OPENSSL_free(tmpbuf);
643
644 return inl;
645 }
646
ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)647 static int ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
648 void *ptr)
649 {
650 /* Pass the ctrl down */
651 int ret = EVP_CIPHER_meth_get_ctrl(EVP_aes_128_gcm())(ctx, type, arg, ptr);
652
653 if (ret <= 0)
654 return ret;
655
656 switch(type) {
657 case EVP_CTRL_AEAD_GET_TAG:
658 /* Always give the same tag */
659 memset(ptr, 0, EVP_GCM_TLS_TAG_LEN);
660 break;
661
662 default:
663 break;
664 }
665
666 return 1;
667 }
668
ossltest_rand_bytes(unsigned char * buf,int num)669 static int ossltest_rand_bytes(unsigned char *buf, int num)
670 {
671 unsigned char val = 1;
672
673 while (--num >= 0)
674 *buf++ = val++;
675 return 1;
676 }
677
ossltest_rand_status(void)678 static int ossltest_rand_status(void)
679 {
680 return 1;
681 }
682
ossltest_rand_method(void)683 static const RAND_METHOD *ossltest_rand_method(void)
684 {
685
686 static RAND_METHOD osslt_rand_meth = {
687 NULL,
688 ossltest_rand_bytes,
689 NULL,
690 NULL,
691 ossltest_rand_bytes,
692 ossltest_rand_status
693 };
694
695 return &osslt_rand_meth;
696 }
697