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 /*
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 /* We need to use some engine deprecated APIs */
17 #define OPENSSL_SUPPRESS_DEPRECATED
18
19 /*
20 * SHA low level APIs are deprecated for public use, but still ok for
21 * internal use. Note, that due to symbols not being exported, only the
22 * #defines and type definitions can be accessed, function calls are not
23 * available. The digest lengths, block sizes and sizeof(CTX) are used herein
24 * for several different digests.
25 */
26 #include "internal/deprecated.h"
27
28 #include <stdio.h>
29 #include <string.h>
30 #include "internal/common.h" /* for CHECK_AND_SKIP_CASE_PREFIX */
31
32 #include <openssl/engine.h>
33 #include <openssl/sha.h>
34 #include <openssl/md5.h>
35 #include <openssl/rsa.h>
36 #include <openssl/evp.h>
37 #include <openssl/modes.h>
38 #include <openssl/aes.h>
39 #include <openssl/rand.h>
40 #include <openssl/crypto.h>
41 #include <openssl/pem.h>
42 #include <crypto/evp.h>
43
44 #include "e_ossltest_err.c"
45
46 /* Engine Id and Name */
47 static const char *engine_ossltest_id = "ossltest";
48 static const char *engine_ossltest_name = "OpenSSL Test engine support";
49
50
51 /* Engine Lifetime functions */
52 static int ossltest_destroy(ENGINE *e);
53 static int ossltest_init(ENGINE *e);
54 static int ossltest_finish(ENGINE *e);
55 void ENGINE_load_ossltest(void);
56
57
58 /* Set up digests */
59 static int ossltest_digests(ENGINE *e, const EVP_MD **digest,
60 const int **nids, int nid);
61 static const RAND_METHOD *ossltest_rand_method(void);
62
63 /* MD5 */
64 static int digest_md5_init(EVP_MD_CTX *ctx);
65 static int digest_md5_update(EVP_MD_CTX *ctx, const void *data,
66 size_t count);
67 static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md);
68
69 static EVP_MD *_hidden_md5_md = NULL;
digest_md5(void)70 static const EVP_MD *digest_md5(void)
71 {
72 if (_hidden_md5_md == NULL) {
73 EVP_MD *md;
74
75 if ((md = EVP_MD_meth_new(NID_md5, NID_md5WithRSAEncryption)) == NULL
76 || !EVP_MD_meth_set_result_size(md, MD5_DIGEST_LENGTH)
77 || !EVP_MD_meth_set_input_blocksize(md, MD5_CBLOCK)
78 || !EVP_MD_meth_set_app_datasize(md,
79 sizeof(EVP_MD *) + sizeof(MD5_CTX))
80 || !EVP_MD_meth_set_flags(md, 0)
81 || !EVP_MD_meth_set_init(md, digest_md5_init)
82 || !EVP_MD_meth_set_update(md, digest_md5_update)
83 || !EVP_MD_meth_set_final(md, digest_md5_final)) {
84 EVP_MD_meth_free(md);
85 md = NULL;
86 }
87 _hidden_md5_md = md;
88 }
89 return _hidden_md5_md;
90 }
91
92 /* SHA1 */
93 static int digest_sha1_init(EVP_MD_CTX *ctx);
94 static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data,
95 size_t count);
96 static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md);
97
98 static EVP_MD *_hidden_sha1_md = NULL;
digest_sha1(void)99 static const EVP_MD *digest_sha1(void)
100 {
101 if (_hidden_sha1_md == NULL) {
102 EVP_MD *md;
103
104 if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL
105 || !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH)
106 || !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK)
107 || !EVP_MD_meth_set_app_datasize(md,
108 sizeof(EVP_MD *) + sizeof(SHA_CTX))
109 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
110 || !EVP_MD_meth_set_init(md, digest_sha1_init)
111 || !EVP_MD_meth_set_update(md, digest_sha1_update)
112 || !EVP_MD_meth_set_final(md, digest_sha1_final)) {
113 EVP_MD_meth_free(md);
114 md = NULL;
115 }
116 _hidden_sha1_md = md;
117 }
118 return _hidden_sha1_md;
119 }
120
121 /* SHA256 */
122 static int digest_sha256_init(EVP_MD_CTX *ctx);
123 static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data,
124 size_t count);
125 static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md);
126
127 static EVP_MD *_hidden_sha256_md = NULL;
digest_sha256(void)128 static const EVP_MD *digest_sha256(void)
129 {
130 if (_hidden_sha256_md == NULL) {
131 EVP_MD *md;
132
133 if ((md = EVP_MD_meth_new(NID_sha256, NID_sha256WithRSAEncryption)) == NULL
134 || !EVP_MD_meth_set_result_size(md, SHA256_DIGEST_LENGTH)
135 || !EVP_MD_meth_set_input_blocksize(md, SHA256_CBLOCK)
136 || !EVP_MD_meth_set_app_datasize(md,
137 sizeof(EVP_MD *) + sizeof(SHA256_CTX))
138 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
139 || !EVP_MD_meth_set_init(md, digest_sha256_init)
140 || !EVP_MD_meth_set_update(md, digest_sha256_update)
141 || !EVP_MD_meth_set_final(md, digest_sha256_final)) {
142 EVP_MD_meth_free(md);
143 md = NULL;
144 }
145 _hidden_sha256_md = md;
146 }
147 return _hidden_sha256_md;
148 }
149
150 /* SHA384/SHA512 */
151 static int digest_sha384_init(EVP_MD_CTX *ctx);
152 static int digest_sha384_update(EVP_MD_CTX *ctx, const void *data,
153 size_t count);
154 static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md);
155
156 static int digest_sha512_init(EVP_MD_CTX *ctx);
157 static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data,
158 size_t count);
159 static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md);
160
161 static EVP_MD *_hidden_sha384_md = NULL;
digest_sha384(void)162 static const EVP_MD *digest_sha384(void)
163 {
164 if (_hidden_sha384_md == NULL) {
165 EVP_MD *md;
166
167 if ((md = EVP_MD_meth_new(NID_sha384, NID_sha384WithRSAEncryption)) == NULL
168 || !EVP_MD_meth_set_result_size(md, SHA384_DIGEST_LENGTH)
169 || !EVP_MD_meth_set_input_blocksize(md, SHA512_CBLOCK)
170 || !EVP_MD_meth_set_app_datasize(md,
171 sizeof(EVP_MD *) + sizeof(SHA512_CTX))
172 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
173 || !EVP_MD_meth_set_init(md, digest_sha384_init)
174 || !EVP_MD_meth_set_update(md, digest_sha384_update)
175 || !EVP_MD_meth_set_final(md, digest_sha384_final)) {
176 EVP_MD_meth_free(md);
177 md = NULL;
178 }
179 _hidden_sha384_md = md;
180 }
181 return _hidden_sha384_md;
182 }
183 static EVP_MD *_hidden_sha512_md = NULL;
digest_sha512(void)184 static const EVP_MD *digest_sha512(void)
185 {
186 if (_hidden_sha512_md == NULL) {
187 EVP_MD *md;
188
189 if ((md = EVP_MD_meth_new(NID_sha512, NID_sha512WithRSAEncryption)) == NULL
190 || !EVP_MD_meth_set_result_size(md, SHA512_DIGEST_LENGTH)
191 || !EVP_MD_meth_set_input_blocksize(md, SHA512_CBLOCK)
192 || !EVP_MD_meth_set_app_datasize(md,
193 sizeof(EVP_MD *) + sizeof(SHA512_CTX))
194 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_DIGALGID_ABSENT)
195 || !EVP_MD_meth_set_init(md, digest_sha512_init)
196 || !EVP_MD_meth_set_update(md, digest_sha512_update)
197 || !EVP_MD_meth_set_final(md, digest_sha512_final)) {
198 EVP_MD_meth_free(md);
199 md = NULL;
200 }
201 _hidden_sha512_md = md;
202 }
203 return _hidden_sha512_md;
204 }
destroy_digests(void)205 static void destroy_digests(void)
206 {
207 EVP_MD_meth_free(_hidden_md5_md);
208 _hidden_md5_md = NULL;
209 EVP_MD_meth_free(_hidden_sha1_md);
210 _hidden_sha1_md = NULL;
211 EVP_MD_meth_free(_hidden_sha256_md);
212 _hidden_sha256_md = NULL;
213 EVP_MD_meth_free(_hidden_sha384_md);
214 _hidden_sha384_md = NULL;
215 EVP_MD_meth_free(_hidden_sha512_md);
216 _hidden_sha512_md = NULL;
217 }
ossltest_digest_nids(const int ** nids)218 static int ossltest_digest_nids(const int **nids)
219 {
220 static int digest_nids[6] = { 0, 0, 0, 0, 0, 0 };
221 static int pos = 0;
222 static int init = 0;
223
224 if (!init) {
225 const EVP_MD *md;
226 if ((md = digest_md5()) != NULL)
227 digest_nids[pos++] = EVP_MD_get_type(md);
228 if ((md = digest_sha1()) != NULL)
229 digest_nids[pos++] = EVP_MD_get_type(md);
230 if ((md = digest_sha256()) != NULL)
231 digest_nids[pos++] = EVP_MD_get_type(md);
232 if ((md = digest_sha384()) != NULL)
233 digest_nids[pos++] = EVP_MD_get_type(md);
234 if ((md = digest_sha512()) != NULL)
235 digest_nids[pos++] = EVP_MD_get_type(md);
236 digest_nids[pos] = 0;
237 init = 1;
238 }
239 *nids = digest_nids;
240 return pos;
241 }
242
243 /* Setup ciphers */
244 static int ossltest_ciphers(ENGINE *, const EVP_CIPHER **,
245 const int **, int);
246
247 static int ossltest_cipher_nids[] = {
248 NID_aes_128_cbc, NID_aes_128_gcm,
249 NID_aes_128_cbc_hmac_sha1, 0
250 };
251
252 /* AES128 */
253
254 static int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx,
255 const unsigned char *key,
256 const unsigned char *iv, int enc);
257 static int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
258 const unsigned char *in, size_t inl);
259 static int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx,
260 const unsigned char *key,
261 const unsigned char *iv, int enc);
262 static int ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
263 const unsigned char *in, size_t inl);
264 static int ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
265 void *ptr);
266 static int ossltest_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
267 const unsigned char *key,
268 const unsigned char *iv,
269 int enc);
270 static int ossltest_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
271 unsigned char *out,
272 const unsigned char *in,
273 size_t inl);
274 static int ossltest_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
275 int arg, void *ptr);
276
277 typedef struct {
278 size_t payload_length; /* AAD length in decrypt case */
279 unsigned int tls_ver;
280 } EVP_AES_HMAC_SHA1;
281
282 static EVP_CIPHER *_hidden_aes_128_cbc = NULL;
ossltest_aes_128_cbc(void)283 static const EVP_CIPHER *ossltest_aes_128_cbc(void)
284 {
285 if (_hidden_aes_128_cbc == NULL
286 && ((_hidden_aes_128_cbc = EVP_CIPHER_meth_new(NID_aes_128_cbc,
287 16 /* block size */,
288 16 /* key len */)) == NULL
289 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc,16)
290 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc,
291 EVP_CIPH_FLAG_DEFAULT_ASN1
292 | EVP_CIPH_CBC_MODE)
293 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc,
294 ossltest_aes128_init_key)
295 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc,
296 ossltest_aes128_cbc_cipher)
297 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc,
298 EVP_CIPHER_impl_ctx_size(EVP_aes_128_cbc())))) {
299 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
300 _hidden_aes_128_cbc = NULL;
301 }
302 return _hidden_aes_128_cbc;
303 }
304
305 static EVP_CIPHER *_hidden_aes_128_gcm = NULL;
306
307 #define AES_GCM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
308 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
309 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
310 | EVP_CIPH_CUSTOM_COPY |EVP_CIPH_FLAG_AEAD_CIPHER \
311 | EVP_CIPH_GCM_MODE)
312
ossltest_aes_128_gcm(void)313 static const EVP_CIPHER *ossltest_aes_128_gcm(void)
314 {
315 if (_hidden_aes_128_gcm == NULL
316 && ((_hidden_aes_128_gcm = EVP_CIPHER_meth_new(NID_aes_128_gcm,
317 1 /* block size */,
318 16 /* key len */)) == NULL
319 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_gcm,12)
320 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_gcm, AES_GCM_FLAGS)
321 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_gcm,
322 ossltest_aes128_gcm_init_key)
323 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_gcm,
324 ossltest_aes128_gcm_cipher)
325 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_gcm,
326 ossltest_aes128_gcm_ctrl)
327 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_gcm,
328 EVP_CIPHER_impl_ctx_size(EVP_aes_128_gcm())))) {
329 EVP_CIPHER_meth_free(_hidden_aes_128_gcm);
330 _hidden_aes_128_gcm = NULL;
331 }
332 return _hidden_aes_128_gcm;
333 }
334
335 static EVP_CIPHER *_hidden_aes_128_cbc_hmac_sha1 = NULL;
336
ossltest_aes_128_cbc_hmac_sha1(void)337 static const EVP_CIPHER *ossltest_aes_128_cbc_hmac_sha1(void)
338 {
339 if (_hidden_aes_128_cbc_hmac_sha1 == NULL
340 && ((_hidden_aes_128_cbc_hmac_sha1
341 = EVP_CIPHER_meth_new(NID_aes_128_cbc_hmac_sha1,
342 16 /* block size */,
343 16 /* key len */)) == NULL
344 || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc_hmac_sha1,16)
345 || !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc_hmac_sha1,
346 EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
347 EVP_CIPH_FLAG_AEAD_CIPHER)
348 || !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc_hmac_sha1,
349 ossltest_aes128_cbc_hmac_sha1_init_key)
350 || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc_hmac_sha1,
351 ossltest_aes128_cbc_hmac_sha1_cipher)
352 || !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_cbc_hmac_sha1,
353 ossltest_aes128_cbc_hmac_sha1_ctrl)
354 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_aes_128_cbc_hmac_sha1,
355 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_set_asn1_iv)
356 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_aes_128_cbc_hmac_sha1,
357 EVP_CIPH_FLAG_DEFAULT_ASN1 ? NULL : EVP_CIPHER_get_asn1_iv)
358 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc_hmac_sha1,
359 sizeof(EVP_AES_HMAC_SHA1)))) {
360 EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1);
361 _hidden_aes_128_cbc_hmac_sha1 = NULL;
362 }
363 return _hidden_aes_128_cbc_hmac_sha1;
364 }
365
destroy_ciphers(void)366 static void destroy_ciphers(void)
367 {
368 EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
369 EVP_CIPHER_meth_free(_hidden_aes_128_gcm);
370 EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1);
371 _hidden_aes_128_cbc = NULL;
372 _hidden_aes_128_gcm = NULL;
373 _hidden_aes_128_cbc_hmac_sha1 = NULL;
374 }
375
376 /* Key loading */
load_key(ENGINE * eng,const char * key_id,int pub,UI_METHOD * ui_method,void * ui_data)377 static EVP_PKEY *load_key(ENGINE *eng, const char *key_id, int pub,
378 UI_METHOD *ui_method, void *ui_data)
379 {
380 BIO *in;
381 EVP_PKEY *key;
382
383 if (!CHECK_AND_SKIP_CASE_PREFIX(key_id, "ot:"))
384 return NULL;
385
386 fprintf(stderr, "[ossltest]Loading %s key %s\n",
387 pub ? "Public" : "Private", key_id);
388 in = BIO_new_file(key_id, "r");
389 if (!in)
390 return NULL;
391 if (pub)
392 key = PEM_read_bio_PUBKEY(in, NULL, 0, NULL);
393 else
394 key = PEM_read_bio_PrivateKey(in, NULL, 0, NULL);
395 BIO_free(in);
396 return key;
397 }
398
ossltest_load_privkey(ENGINE * eng,const char * key_id,UI_METHOD * ui_method,void * ui_data)399 static EVP_PKEY *ossltest_load_privkey(ENGINE *eng, const char *key_id,
400 UI_METHOD *ui_method, void *ui_data)
401 {
402 return load_key(eng, key_id, 0, ui_method, ui_data);
403 }
404
ossltest_load_pubkey(ENGINE * eng,const char * key_id,UI_METHOD * ui_method,void * ui_data)405 static EVP_PKEY *ossltest_load_pubkey(ENGINE *eng, const char *key_id,
406 UI_METHOD *ui_method, void *ui_data)
407 {
408 return load_key(eng, key_id, 1, ui_method, ui_data);
409 }
410
411
bind_ossltest(ENGINE * e)412 static int bind_ossltest(ENGINE *e)
413 {
414 /* Ensure the ossltest error handling is set up */
415 ERR_load_OSSLTEST_strings();
416
417 if (!ENGINE_set_id(e, engine_ossltest_id)
418 || !ENGINE_set_name(e, engine_ossltest_name)
419 || !ENGINE_set_digests(e, ossltest_digests)
420 || !ENGINE_set_ciphers(e, ossltest_ciphers)
421 || !ENGINE_set_RAND(e, ossltest_rand_method())
422 || !ENGINE_set_destroy_function(e, ossltest_destroy)
423 || !ENGINE_set_load_privkey_function(e, ossltest_load_privkey)
424 || !ENGINE_set_load_pubkey_function(e, ossltest_load_pubkey)
425 || !ENGINE_set_init_function(e, ossltest_init)
426 || !ENGINE_set_finish_function(e, ossltest_finish)) {
427 OSSLTESTerr(OSSLTEST_F_BIND_OSSLTEST, OSSLTEST_R_INIT_FAILED);
428 return 0;
429 }
430
431 return 1;
432 }
433
434 #ifndef OPENSSL_NO_DYNAMIC_ENGINE
bind_helper(ENGINE * e,const char * id)435 static int bind_helper(ENGINE *e, const char *id)
436 {
437 if (id && (strcmp(id, engine_ossltest_id) != 0))
438 return 0;
439 if (!bind_ossltest(e))
440 return 0;
441 return 1;
442 }
443
444 IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)445 IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
446 #endif
447
448 static ENGINE *engine_ossltest(void)
449 {
450 ENGINE *ret = ENGINE_new();
451 if (ret == NULL)
452 return NULL;
453 if (!bind_ossltest(ret)) {
454 ENGINE_free(ret);
455 return NULL;
456 }
457 return ret;
458 }
459
ENGINE_load_ossltest(void)460 void ENGINE_load_ossltest(void)
461 {
462 /* Copied from eng_[openssl|dyn].c */
463 ENGINE *toadd = engine_ossltest();
464 if (!toadd)
465 return;
466 ENGINE_add(toadd);
467 ENGINE_free(toadd);
468 ERR_clear_error();
469 }
470
471
ossltest_init(ENGINE * e)472 static int ossltest_init(ENGINE *e)
473 {
474 return 1;
475 }
476
477
ossltest_finish(ENGINE * e)478 static int ossltest_finish(ENGINE *e)
479 {
480 return 1;
481 }
482
483
ossltest_destroy(ENGINE * e)484 static int ossltest_destroy(ENGINE *e)
485 {
486 destroy_digests();
487 destroy_ciphers();
488 ERR_unload_OSSLTEST_strings();
489 return 1;
490 }
491
ossltest_digests(ENGINE * e,const EVP_MD ** digest,const int ** nids,int nid)492 static int ossltest_digests(ENGINE *e, const EVP_MD **digest,
493 const int **nids, int nid)
494 {
495 int ok = 1;
496 if (!digest) {
497 /* We are returning a list of supported nids */
498 return ossltest_digest_nids(nids);
499 }
500 /* We are being asked for a specific digest */
501 switch (nid) {
502 case NID_md5:
503 *digest = digest_md5();
504 break;
505 case NID_sha1:
506 *digest = digest_sha1();
507 break;
508 case NID_sha256:
509 *digest = digest_sha256();
510 break;
511 case NID_sha384:
512 *digest = digest_sha384();
513 break;
514 case NID_sha512:
515 *digest = digest_sha512();
516 break;
517 default:
518 ok = 0;
519 *digest = NULL;
520 break;
521 }
522 return ok;
523 }
524
ossltest_ciphers(ENGINE * e,const EVP_CIPHER ** cipher,const int ** nids,int nid)525 static int ossltest_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
526 const int **nids, int nid)
527 {
528 int ok = 1;
529 if (!cipher) {
530 /* We are returning a list of supported nids */
531 *nids = ossltest_cipher_nids;
532 return (sizeof(ossltest_cipher_nids) - 1)
533 / sizeof(ossltest_cipher_nids[0]);
534 }
535 /* We are being asked for a specific cipher */
536 switch (nid) {
537 case NID_aes_128_cbc:
538 *cipher = ossltest_aes_128_cbc();
539 break;
540 case NID_aes_128_gcm:
541 *cipher = ossltest_aes_128_gcm();
542 break;
543 case NID_aes_128_cbc_hmac_sha1:
544 *cipher = ossltest_aes_128_cbc_hmac_sha1();
545 break;
546 default:
547 ok = 0;
548 *cipher = NULL;
549 break;
550 }
551 return ok;
552 }
553
fill_known_data(unsigned char * md,unsigned int len)554 static void fill_known_data(unsigned char *md, unsigned int len)
555 {
556 unsigned int i;
557
558 for (i=0; i<len; i++) {
559 md[i] = (unsigned char)(i & 0xff);
560 }
561 }
562
563 /*
564 * MD5 implementation. We go through the motions of doing MD5 by deferring to
565 * the standard implementation. Then we overwrite the result with a will defined
566 * value, so that all "MD5" digests using the test engine always end up with
567 * the same value.
568 */
digest_md5_init(EVP_MD_CTX * ctx)569 static int digest_md5_init(EVP_MD_CTX *ctx)
570 {
571 return EVP_MD_meth_get_init(EVP_md5())(ctx);
572 }
573
digest_md5_update(EVP_MD_CTX * ctx,const void * data,size_t count)574 static int digest_md5_update(EVP_MD_CTX *ctx, const void *data,
575 size_t count)
576 {
577 return EVP_MD_meth_get_update(EVP_md5())(ctx, data, count);
578 }
579
digest_md5_final(EVP_MD_CTX * ctx,unsigned char * md)580 static int digest_md5_final(EVP_MD_CTX *ctx, unsigned char *md)
581 {
582 int ret = EVP_MD_meth_get_final(EVP_md5())(ctx, md);
583
584 if (ret > 0) {
585 fill_known_data(md, MD5_DIGEST_LENGTH);
586 }
587 return ret;
588 }
589
590 /*
591 * SHA1 implementation.
592 */
digest_sha1_init(EVP_MD_CTX * ctx)593 static int digest_sha1_init(EVP_MD_CTX *ctx)
594 {
595 return EVP_MD_meth_get_init(EVP_sha1())(ctx);
596 }
597
digest_sha1_update(EVP_MD_CTX * ctx,const void * data,size_t count)598 static int digest_sha1_update(EVP_MD_CTX *ctx, const void *data,
599 size_t count)
600 {
601 return EVP_MD_meth_get_update(EVP_sha1())(ctx, data, count);
602 }
603
digest_sha1_final(EVP_MD_CTX * ctx,unsigned char * md)604 static int digest_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
605 {
606 int ret = EVP_MD_meth_get_final(EVP_sha1())(ctx, md);
607
608 if (ret > 0) {
609 fill_known_data(md, SHA_DIGEST_LENGTH);
610 }
611 return ret;
612 }
613
614 /*
615 * SHA256 implementation.
616 */
digest_sha256_init(EVP_MD_CTX * ctx)617 static int digest_sha256_init(EVP_MD_CTX *ctx)
618 {
619 return EVP_MD_meth_get_init(EVP_sha256())(ctx);
620 }
621
digest_sha256_update(EVP_MD_CTX * ctx,const void * data,size_t count)622 static int digest_sha256_update(EVP_MD_CTX *ctx, const void *data,
623 size_t count)
624 {
625 return EVP_MD_meth_get_update(EVP_sha256())(ctx, data, count);
626 }
627
digest_sha256_final(EVP_MD_CTX * ctx,unsigned char * md)628 static int digest_sha256_final(EVP_MD_CTX *ctx, unsigned char *md)
629 {
630 int ret = EVP_MD_meth_get_final(EVP_sha256())(ctx, md);
631
632 if (ret > 0) {
633 fill_known_data(md, SHA256_DIGEST_LENGTH);
634 }
635 return ret;
636 }
637
638 /*
639 * SHA384 implementation.
640 */
digest_sha384_init(EVP_MD_CTX * ctx)641 static int digest_sha384_init(EVP_MD_CTX *ctx)
642 {
643 return EVP_MD_meth_get_init(EVP_sha384())(ctx);
644 }
645
digest_sha384_update(EVP_MD_CTX * ctx,const void * data,size_t count)646 static int digest_sha384_update(EVP_MD_CTX *ctx, const void *data,
647 size_t count)
648 {
649 return EVP_MD_meth_get_update(EVP_sha384())(ctx, data, count);
650 }
651
digest_sha384_final(EVP_MD_CTX * ctx,unsigned char * md)652 static int digest_sha384_final(EVP_MD_CTX *ctx, unsigned char *md)
653 {
654 int ret = EVP_MD_meth_get_final(EVP_sha384())(ctx, md);
655
656 if (ret > 0) {
657 fill_known_data(md, SHA384_DIGEST_LENGTH);
658 }
659 return ret;
660 }
661
662 /*
663 * SHA512 implementation.
664 */
digest_sha512_init(EVP_MD_CTX * ctx)665 static int digest_sha512_init(EVP_MD_CTX *ctx)
666 {
667 return EVP_MD_meth_get_init(EVP_sha512())(ctx);
668 }
669
digest_sha512_update(EVP_MD_CTX * ctx,const void * data,size_t count)670 static int digest_sha512_update(EVP_MD_CTX *ctx, const void *data,
671 size_t count)
672 {
673 return EVP_MD_meth_get_update(EVP_sha512())(ctx, data, count);
674 }
675
digest_sha512_final(EVP_MD_CTX * ctx,unsigned char * md)676 static int digest_sha512_final(EVP_MD_CTX *ctx, unsigned char *md)
677 {
678 int ret = EVP_MD_meth_get_final(EVP_sha512())(ctx, md);
679
680 if (ret > 0) {
681 fill_known_data(md, SHA512_DIGEST_LENGTH);
682 }
683 return ret;
684 }
685
686 /*
687 * AES128 Implementation
688 */
689
ossltest_aes128_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)690 static int ossltest_aes128_init_key(EVP_CIPHER_CTX *ctx,
691 const unsigned char *key,
692 const unsigned char *iv, int enc)
693 {
694 return EVP_CIPHER_meth_get_init(EVP_aes_128_cbc()) (ctx, key, iv, enc);
695 }
696
ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)697 static int ossltest_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
698 const unsigned char *in, size_t inl)
699 {
700 unsigned char *tmpbuf;
701 int ret;
702
703 tmpbuf = OPENSSL_malloc(inl);
704
705 /* OPENSSL_malloc will return NULL if inl == 0 */
706 if (tmpbuf == NULL && inl > 0)
707 return -1;
708
709 /* Remember what we were asked to encrypt */
710 if (tmpbuf != NULL)
711 memcpy(tmpbuf, in, inl);
712
713 /* Go through the motions of encrypting it */
714 ret = EVP_CIPHER_meth_get_do_cipher(EVP_aes_128_cbc())(ctx, out, in, inl);
715
716 /* Throw it all away and just use the plaintext as the output */
717 if (tmpbuf != NULL)
718 memcpy(out, tmpbuf, inl);
719 OPENSSL_free(tmpbuf);
720
721 return ret;
722 }
723
ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)724 static int ossltest_aes128_gcm_init_key(EVP_CIPHER_CTX *ctx,
725 const unsigned char *key,
726 const unsigned char *iv, int enc)
727 {
728 return EVP_CIPHER_meth_get_init(EVP_aes_128_gcm()) (ctx, key, iv, enc);
729 }
730
ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)731 static int ossltest_aes128_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
732 const unsigned char *in, size_t inl)
733 {
734 unsigned char *tmpbuf = OPENSSL_malloc(inl);
735
736 /* OPENSSL_malloc will return NULL if inl == 0 */
737 if (tmpbuf == NULL && inl > 0)
738 return -1;
739
740 /* Remember what we were asked to encrypt */
741 if (tmpbuf != NULL)
742 memcpy(tmpbuf, in, inl);
743
744 /* Go through the motions of encrypting it */
745 EVP_CIPHER_meth_get_do_cipher(EVP_aes_128_gcm())(ctx, out, in, inl);
746
747 /* Throw it all away and just use the plaintext as the output */
748 if (tmpbuf != NULL && out != NULL)
749 memcpy(out, tmpbuf, inl);
750 OPENSSL_free(tmpbuf);
751
752 return inl;
753 }
754
ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)755 static int ossltest_aes128_gcm_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
756 void *ptr)
757 {
758 /* Pass the ctrl down */
759 int ret = EVP_CIPHER_meth_get_ctrl(EVP_aes_128_gcm())(ctx, type, arg, ptr);
760
761 if (ret <= 0)
762 return ret;
763
764 switch (type) {
765 case EVP_CTRL_AEAD_GET_TAG:
766 /* Always give the same tag */
767 memset(ptr, 0, EVP_GCM_TLS_TAG_LEN);
768 break;
769
770 default:
771 break;
772 }
773
774 return 1;
775 }
776
777 #define NO_PAYLOAD_LENGTH ((size_t)-1)
778 # define data(ctx) ((EVP_AES_HMAC_SHA1 *)EVP_CIPHER_CTX_get_cipher_data(ctx))
779
ossltest_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * inkey,const unsigned char * iv,int enc)780 static int ossltest_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
781 const unsigned char *inkey,
782 const unsigned char *iv,
783 int enc)
784 {
785 EVP_AES_HMAC_SHA1 *key = data(ctx);
786 key->payload_length = NO_PAYLOAD_LENGTH;
787 return 1;
788 }
789
ossltest_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)790 static int ossltest_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
791 unsigned char *out,
792 const unsigned char *in,
793 size_t len)
794 {
795 EVP_AES_HMAC_SHA1 *key = data(ctx);
796 unsigned int l;
797 size_t plen = key->payload_length;
798
799 key->payload_length = NO_PAYLOAD_LENGTH;
800
801 if (len % AES_BLOCK_SIZE)
802 return 0;
803
804 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
805 if (plen == NO_PAYLOAD_LENGTH)
806 plen = len;
807 else if (len !=
808 ((plen + SHA_DIGEST_LENGTH +
809 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
810 return 0;
811
812 memmove(out, in, plen);
813
814 if (plen != len) { /* "TLS" mode of operation */
815 /* calculate HMAC and append it to payload */
816 fill_known_data(out + plen, SHA_DIGEST_LENGTH);
817
818 /* pad the payload|hmac */
819 plen += SHA_DIGEST_LENGTH;
820 for (l = len - plen - 1; plen < len; plen++)
821 out[plen] = l;
822 }
823 } else {
824 /* decrypt HMAC|padding at once */
825 memmove(out, in, len);
826
827 if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
828 unsigned int maxpad, pad;
829
830 if (key->tls_ver >= TLS1_1_VERSION) {
831 if (len < (AES_BLOCK_SIZE + SHA_DIGEST_LENGTH + 1))
832 return 0;
833
834 /* omit explicit iv */
835 in += AES_BLOCK_SIZE;
836 out += AES_BLOCK_SIZE;
837 len -= AES_BLOCK_SIZE;
838 } else if (len < (SHA_DIGEST_LENGTH + 1))
839 return 0;
840
841 /* figure out payload length */
842 pad = out[len - 1];
843 maxpad = len - (SHA_DIGEST_LENGTH + 1);
844 if (pad > maxpad)
845 return 0;
846 for (plen = len - pad - 1; plen < len; plen++)
847 if (out[plen] != pad)
848 return 0;
849 }
850 }
851
852 return 1;
853 }
854
ossltest_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)855 static int ossltest_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
856 int arg, void *ptr)
857 {
858 EVP_AES_HMAC_SHA1 *key = data(ctx);
859
860 switch (type) {
861 case EVP_CTRL_AEAD_SET_MAC_KEY:
862 return 1;
863
864 case EVP_CTRL_AEAD_TLS1_AAD:
865 {
866 unsigned char *p = ptr;
867 unsigned int len;
868
869 if (arg != EVP_AEAD_TLS1_AAD_LEN)
870 return -1;
871
872 len = p[arg - 2] << 8 | p[arg - 1];
873 key->tls_ver = p[arg - 4] << 8 | p[arg - 3];
874
875 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
876 key->payload_length = len;
877 if (key->tls_ver >= TLS1_1_VERSION) {
878 if (len < AES_BLOCK_SIZE)
879 return 0;
880 len -= AES_BLOCK_SIZE;
881 p[arg - 2] = len >> 8;
882 p[arg - 1] = len;
883 }
884
885 return (int)(((len + SHA_DIGEST_LENGTH +
886 AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
887 - len);
888 } else {
889 key->payload_length = arg;
890
891 return SHA_DIGEST_LENGTH;
892 }
893 }
894 default:
895 return -1;
896 }
897 }
898
ossltest_rand_bytes(unsigned char * buf,int num)899 static int ossltest_rand_bytes(unsigned char *buf, int num)
900 {
901 unsigned char val = 1;
902
903 while (--num >= 0)
904 *buf++ = val++;
905 return 1;
906 }
907
ossltest_rand_status(void)908 static int ossltest_rand_status(void)
909 {
910 return 1;
911 }
912
ossltest_rand_method(void)913 static const RAND_METHOD *ossltest_rand_method(void)
914 {
915
916 static RAND_METHOD osslt_rand_meth = {
917 NULL,
918 ossltest_rand_bytes,
919 NULL,
920 NULL,
921 ossltest_rand_bytes,
922 ossltest_rand_status
923 };
924
925 return &osslt_rand_meth;
926 }
927
