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1 | /* | |
2 | * Copyright 1995-2019 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 | #include <stdio.h> | |
11 | #include <assert.h> | |
12 | #include "internal/cryptlib.h" | |
13 | #include <openssl/evp.h> | |
14 | #include <openssl/err.h> | |
15 | #include <openssl/rand.h> | |
16 | #include <openssl/rand_drbg.h> | |
17 | #include <openssl/engine.h> | |
18 | #include <openssl/params.h> | |
19 | #include <openssl/core_names.h> | |
20 | #include "internal/evp_int.h" | |
21 | #include "internal/provider.h" | |
22 | #include "evp_locl.h" | |
23 | ||
24 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) | |
25 | { | |
26 | if (ctx == NULL) | |
27 | return 1; | |
28 | ||
29 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) | |
30 | goto legacy; | |
31 | ||
32 | if (ctx->provctx != NULL) { | |
33 | if (ctx->cipher->freectx != NULL) | |
34 | ctx->cipher->freectx(ctx->provctx); | |
35 | ctx->provctx = NULL; | |
36 | } | |
37 | if (ctx->fetched_cipher != NULL) | |
38 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
39 | memset(ctx, 0, sizeof(*ctx)); | |
40 | ||
41 | return 1; | |
42 | ||
43 | /* TODO(3.0): Remove legacy code below */ | |
44 | legacy: | |
45 | ||
46 | if (ctx->cipher != NULL) { | |
47 | if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) | |
48 | return 0; | |
49 | /* Cleanse cipher context data */ | |
50 | if (ctx->cipher_data && ctx->cipher->ctx_size) | |
51 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
52 | } | |
53 | OPENSSL_free(ctx->cipher_data); | |
54 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) | |
55 | ENGINE_finish(ctx->engine); | |
56 | #endif | |
57 | memset(ctx, 0, sizeof(*ctx)); | |
58 | return 1; | |
59 | } | |
60 | ||
61 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) | |
62 | { | |
63 | return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX)); | |
64 | } | |
65 | ||
66 | void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) | |
67 | { | |
68 | EVP_CIPHER_CTX_reset(ctx); | |
69 | OPENSSL_free(ctx); | |
70 | } | |
71 | ||
72 | int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
73 | const unsigned char *key, const unsigned char *iv, int enc) | |
74 | { | |
75 | if (cipher != NULL) | |
76 | EVP_CIPHER_CTX_reset(ctx); | |
77 | return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc); | |
78 | } | |
79 | ||
80 | int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
81 | ENGINE *impl, const unsigned char *key, | |
82 | const unsigned char *iv, int enc) | |
83 | { | |
84 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) | |
85 | ENGINE *tmpimpl = NULL; | |
86 | #endif | |
87 | const EVP_CIPHER *tmpcipher; | |
88 | ||
89 | /* | |
90 | * enc == 1 means we are encrypting. | |
91 | * enc == 0 means we are decrypting. | |
92 | * enc == -1 means, use the previously initialised value for encrypt/decrypt | |
93 | */ | |
94 | if (enc == -1) { | |
95 | enc = ctx->encrypt; | |
96 | } else { | |
97 | if (enc) | |
98 | enc = 1; | |
99 | ctx->encrypt = enc; | |
100 | } | |
101 | ||
102 | if (cipher == NULL && ctx->cipher == NULL) { | |
103 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET); | |
104 | return 0; | |
105 | } | |
106 | ||
107 | /* TODO(3.0): Legacy work around code below. Remove this */ | |
108 | ||
109 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) | |
110 | /* | |
111 | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so | |
112 | * this context may already have an ENGINE! Try to avoid releasing the | |
113 | * previous handle, re-querying for an ENGINE, and having a | |
114 | * reinitialisation, when it may all be unnecessary. | |
115 | */ | |
116 | if (ctx->engine && ctx->cipher | |
117 | && (cipher == NULL || cipher->nid == ctx->cipher->nid)) | |
118 | goto skip_to_init; | |
119 | ||
120 | if (cipher != NULL && impl == NULL) { | |
121 | /* Ask if an ENGINE is reserved for this job */ | |
122 | tmpimpl = ENGINE_get_cipher_engine(cipher->nid); | |
123 | } | |
124 | #endif | |
125 | ||
126 | /* | |
127 | * If there are engines involved then we should use legacy handling for now. | |
128 | */ | |
129 | if (ctx->engine != NULL | |
130 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) | |
131 | || tmpimpl != NULL | |
132 | #endif | |
133 | || impl != NULL) { | |
134 | if (ctx->cipher == ctx->fetched_cipher) | |
135 | ctx->cipher = NULL; | |
136 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
137 | ctx->fetched_cipher = NULL; | |
138 | goto legacy; | |
139 | } | |
140 | ||
141 | tmpcipher = (cipher == NULL) ? ctx->cipher : cipher; | |
142 | ||
143 | if (tmpcipher->prov == NULL) { | |
144 | switch(tmpcipher->nid) { | |
145 | case NID_aes_256_ecb: | |
146 | case NID_aes_192_ecb: | |
147 | case NID_aes_128_ecb: | |
148 | case NID_aes_256_cbc: | |
149 | case NID_aes_192_cbc: | |
150 | case NID_aes_128_cbc: | |
151 | case NID_aes_256_ofb128: | |
152 | case NID_aes_192_ofb128: | |
153 | case NID_aes_128_ofb128: | |
154 | case NID_aes_256_cfb128: | |
155 | case NID_aes_192_cfb128: | |
156 | case NID_aes_128_cfb128: | |
157 | case NID_aes_256_cfb1: | |
158 | case NID_aes_192_cfb1: | |
159 | case NID_aes_128_cfb1: | |
160 | case NID_aes_256_cfb8: | |
161 | case NID_aes_192_cfb8: | |
162 | case NID_aes_128_cfb8: | |
163 | case NID_aes_256_ctr: | |
164 | case NID_aes_192_ctr: | |
165 | case NID_aes_128_ctr: | |
166 | case NID_aes_256_gcm: | |
167 | case NID_aes_192_gcm: | |
168 | case NID_aes_128_gcm: | |
169 | case NID_aria_256_gcm: | |
170 | case NID_aria_192_gcm: | |
171 | case NID_aria_128_gcm: | |
172 | break; | |
173 | default: | |
174 | goto legacy; | |
175 | } | |
176 | } | |
177 | ||
178 | /* | |
179 | * Ensure a context left lying around from last time is cleared | |
180 | * (legacy code) | |
181 | */ | |
182 | if (cipher != NULL && ctx->cipher != NULL) { | |
183 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
184 | ctx->cipher_data = NULL; | |
185 | } | |
186 | ||
187 | ||
188 | /* TODO(3.0): Start of non-legacy code below */ | |
189 | ||
190 | /* Ensure a context left lying around from last time is cleared */ | |
191 | if (cipher != NULL && ctx->cipher != NULL) { | |
192 | unsigned long flags = ctx->flags; | |
193 | ||
194 | EVP_CIPHER_CTX_reset(ctx); | |
195 | /* Restore encrypt and flags */ | |
196 | ctx->encrypt = enc; | |
197 | ctx->flags = flags; | |
198 | } | |
199 | ||
200 | if (cipher != NULL) | |
201 | ctx->cipher = cipher; | |
202 | else | |
203 | cipher = ctx->cipher; | |
204 | ||
205 | if (cipher->prov == NULL) { | |
206 | #ifdef FIPS_MODE | |
207 | /* We only do explict fetches inside the FIPS module */ | |
208 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
209 | return 0; | |
210 | #else | |
211 | EVP_CIPHER *provciph = | |
212 | EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), ""); | |
213 | ||
214 | if (provciph == NULL) { | |
215 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
216 | return 0; | |
217 | } | |
218 | cipher = provciph; | |
219 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
220 | ctx->fetched_cipher = provciph; | |
221 | #endif | |
222 | } | |
223 | ||
224 | ctx->cipher = cipher; | |
225 | if (ctx->provctx == NULL) { | |
226 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); | |
227 | if (ctx->provctx == NULL) { | |
228 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
229 | return 0; | |
230 | } | |
231 | } | |
232 | ||
233 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
234 | /* | |
235 | * If this ctx was already set up for no padding then we need to tell | |
236 | * the new cipher about it. | |
237 | */ | |
238 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
239 | return 0; | |
240 | } | |
241 | ||
242 | switch (EVP_CIPHER_mode(ctx->cipher)) { | |
243 | case EVP_CIPH_CFB_MODE: | |
244 | case EVP_CIPH_OFB_MODE: | |
245 | case EVP_CIPH_CBC_MODE: | |
246 | /* For these modes we remember the original IV for later use */ | |
247 | if (!ossl_assert(EVP_CIPHER_CTX_iv_length(ctx) <= (int)sizeof(ctx->oiv))) { | |
248 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
249 | return 0; | |
250 | } | |
251 | if (iv != NULL) | |
252 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
253 | } | |
254 | ||
255 | if (enc) { | |
256 | if (ctx->cipher->einit == NULL) { | |
257 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
258 | return 0; | |
259 | } | |
260 | ||
261 | return ctx->cipher->einit(ctx->provctx, | |
262 | key, | |
263 | key == NULL ? 0 | |
264 | : EVP_CIPHER_CTX_key_length(ctx), | |
265 | iv, | |
266 | iv == NULL ? 0 | |
267 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
268 | } | |
269 | ||
270 | if (ctx->cipher->dinit == NULL) { | |
271 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | return ctx->cipher->dinit(ctx->provctx, | |
276 | key, | |
277 | key == NULL ? 0 | |
278 | : EVP_CIPHER_CTX_key_length(ctx), | |
279 | iv, | |
280 | iv == NULL ? 0 | |
281 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
282 | ||
283 | /* TODO(3.0): Remove legacy code below */ | |
284 | legacy: | |
285 | ||
286 | if (cipher != NULL) { | |
287 | /* | |
288 | * Ensure a context left lying around from last time is cleared (we | |
289 | * previously attempted to avoid this if the same ENGINE and | |
290 | * EVP_CIPHER could be used). | |
291 | */ | |
292 | if (ctx->cipher) { | |
293 | unsigned long flags = ctx->flags; | |
294 | EVP_CIPHER_CTX_reset(ctx); | |
295 | /* Restore encrypt and flags */ | |
296 | ctx->encrypt = enc; | |
297 | ctx->flags = flags; | |
298 | } | |
299 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) | |
300 | if (impl != NULL) { | |
301 | if (!ENGINE_init(impl)) { | |
302 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
303 | return 0; | |
304 | } | |
305 | } else { | |
306 | impl = tmpimpl; | |
307 | } | |
308 | if (impl != NULL) { | |
309 | /* There's an ENGINE for this job ... (apparently) */ | |
310 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
311 | ||
312 | if (c == NULL) { | |
313 | /* | |
314 | * One positive side-effect of US's export control history, | |
315 | * is that we should at least be able to avoid using US | |
316 | * misspellings of "initialisation"? | |
317 | */ | |
318 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
319 | return 0; | |
320 | } | |
321 | /* We'll use the ENGINE's private cipher definition */ | |
322 | cipher = c; | |
323 | /* | |
324 | * Store the ENGINE functional reference so we know 'cipher' came | |
325 | * from an ENGINE and we need to release it when done. | |
326 | */ | |
327 | ctx->engine = impl; | |
328 | } else { | |
329 | ctx->engine = NULL; | |
330 | } | |
331 | #endif | |
332 | ||
333 | ctx->cipher = cipher; | |
334 | if (ctx->cipher->ctx_size) { | |
335 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); | |
336 | if (ctx->cipher_data == NULL) { | |
337 | ctx->cipher = NULL; | |
338 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); | |
339 | return 0; | |
340 | } | |
341 | } else { | |
342 | ctx->cipher_data = NULL; | |
343 | } | |
344 | ctx->key_len = cipher->key_len; | |
345 | /* Preserve wrap enable flag, zero everything else */ | |
346 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
347 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
348 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
349 | ctx->cipher = NULL; | |
350 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
351 | return 0; | |
352 | } | |
353 | } | |
354 | } | |
355 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) | |
356 | skip_to_init: | |
357 | #endif | |
358 | if (ctx->cipher == NULL) | |
359 | return 0; | |
360 | ||
361 | /* we assume block size is a power of 2 in *cryptUpdate */ | |
362 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
363 | || ctx->cipher->block_size == 8 | |
364 | || ctx->cipher->block_size == 16); | |
365 | ||
366 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
367 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
368 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
369 | return 0; | |
370 | } | |
371 | ||
372 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { | |
373 | switch (EVP_CIPHER_CTX_mode(ctx)) { | |
374 | ||
375 | case EVP_CIPH_STREAM_CIPHER: | |
376 | case EVP_CIPH_ECB_MODE: | |
377 | break; | |
378 | ||
379 | case EVP_CIPH_CFB_MODE: | |
380 | case EVP_CIPH_OFB_MODE: | |
381 | ||
382 | ctx->num = 0; | |
383 | /* fall-through */ | |
384 | ||
385 | case EVP_CIPH_CBC_MODE: | |
386 | ||
387 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
388 | (int)sizeof(ctx->iv)); | |
389 | if (iv) | |
390 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
391 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
392 | break; | |
393 | ||
394 | case EVP_CIPH_CTR_MODE: | |
395 | ctx->num = 0; | |
396 | /* Don't reuse IV for CTR mode */ | |
397 | if (iv) | |
398 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
399 | break; | |
400 | ||
401 | default: | |
402 | return 0; | |
403 | } | |
404 | } | |
405 | ||
406 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
407 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
408 | return 0; | |
409 | } | |
410 | ctx->buf_len = 0; | |
411 | ctx->final_used = 0; | |
412 | ctx->block_mask = ctx->cipher->block_size - 1; | |
413 | return 1; | |
414 | } | |
415 | ||
416 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
417 | const unsigned char *in, int inl) | |
418 | { | |
419 | if (ctx->encrypt) | |
420 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
421 | else | |
422 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
423 | } | |
424 | ||
425 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
426 | { | |
427 | if (ctx->encrypt) | |
428 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
429 | else | |
430 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
431 | } | |
432 | ||
433 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
434 | { | |
435 | if (ctx->encrypt) | |
436 | return EVP_EncryptFinal(ctx, out, outl); | |
437 | else | |
438 | return EVP_DecryptFinal(ctx, out, outl); | |
439 | } | |
440 | ||
441 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
442 | const unsigned char *key, const unsigned char *iv) | |
443 | { | |
444 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
445 | } | |
446 | ||
447 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
448 | ENGINE *impl, const unsigned char *key, | |
449 | const unsigned char *iv) | |
450 | { | |
451 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
452 | } | |
453 | ||
454 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
455 | const unsigned char *key, const unsigned char *iv) | |
456 | { | |
457 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
458 | } | |
459 | ||
460 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
461 | ENGINE *impl, const unsigned char *key, | |
462 | const unsigned char *iv) | |
463 | { | |
464 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
465 | } | |
466 | ||
467 | /* | |
468 | * According to the letter of standard difference between pointers | |
469 | * is specified to be valid only within same object. This makes | |
470 | * it formally challenging to determine if input and output buffers | |
471 | * are not partially overlapping with standard pointer arithmetic. | |
472 | */ | |
473 | #ifdef PTRDIFF_T | |
474 | # undef PTRDIFF_T | |
475 | #endif | |
476 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
477 | /* | |
478 | * Then we have VMS that distinguishes itself by adhering to | |
479 | * sizeof(size_t)==4 even in 64-bit builds, which means that | |
480 | * difference between two pointers might be truncated to 32 bits. | |
481 | * In the context one can even wonder how comparison for | |
482 | * equality is implemented. To be on the safe side we adhere to | |
483 | * PTRDIFF_T even for comparison for equality. | |
484 | */ | |
485 | # define PTRDIFF_T uint64_t | |
486 | #else | |
487 | # define PTRDIFF_T size_t | |
488 | #endif | |
489 | ||
490 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) | |
491 | { | |
492 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
493 | /* | |
494 | * Check for partially overlapping buffers. [Binary logical | |
495 | * operations are used instead of boolean to minimize number | |
496 | * of conditional branches.] | |
497 | */ | |
498 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | | |
499 | (diff > (0 - (PTRDIFF_T)len))); | |
500 | ||
501 | return overlapped; | |
502 | } | |
503 | ||
504 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, | |
505 | unsigned char *out, int *outl, | |
506 | const unsigned char *in, int inl) | |
507 | { | |
508 | int i, j, bl, cmpl = inl; | |
509 | ||
510 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
511 | cmpl = (cmpl + 7) / 8; | |
512 | ||
513 | bl = ctx->cipher->block_size; | |
514 | ||
515 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
516 | /* If block size > 1 then the cipher will have to do this check */ | |
517 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { | |
518 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
519 | return 0; | |
520 | } | |
521 | ||
522 | i = ctx->cipher->do_cipher(ctx, out, in, inl); | |
523 | if (i < 0) | |
524 | return 0; | |
525 | else | |
526 | *outl = i; | |
527 | return 1; | |
528 | } | |
529 | ||
530 | if (inl <= 0) { | |
531 | *outl = 0; | |
532 | return inl == 0; | |
533 | } | |
534 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { | |
535 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
536 | return 0; | |
537 | } | |
538 | ||
539 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
540 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
541 | *outl = inl; | |
542 | return 1; | |
543 | } else { | |
544 | *outl = 0; | |
545 | return 0; | |
546 | } | |
547 | } | |
548 | i = ctx->buf_len; | |
549 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); | |
550 | if (i != 0) { | |
551 | if (bl - i > inl) { | |
552 | memcpy(&(ctx->buf[i]), in, inl); | |
553 | ctx->buf_len += inl; | |
554 | *outl = 0; | |
555 | return 1; | |
556 | } else { | |
557 | j = bl - i; | |
558 | memcpy(&(ctx->buf[i]), in, j); | |
559 | inl -= j; | |
560 | in += j; | |
561 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) | |
562 | return 0; | |
563 | out += bl; | |
564 | *outl = bl; | |
565 | } | |
566 | } else | |
567 | *outl = 0; | |
568 | i = inl & (bl - 1); | |
569 | inl -= i; | |
570 | if (inl > 0) { | |
571 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
572 | return 0; | |
573 | *outl += inl; | |
574 | } | |
575 | ||
576 | if (i != 0) | |
577 | memcpy(ctx->buf, &(in[inl]), i); | |
578 | ctx->buf_len = i; | |
579 | return 1; | |
580 | } | |
581 | ||
582 | ||
583 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
584 | const unsigned char *in, int inl) | |
585 | { | |
586 | int ret; | |
587 | size_t soutl; | |
588 | int blocksize; | |
589 | ||
590 | /* Prevent accidental use of decryption context when encrypting */ | |
591 | if (!ctx->encrypt) { | |
592 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
593 | return 0; | |
594 | } | |
595 | ||
596 | if (ctx->cipher == NULL) { | |
597 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
598 | return 0; | |
599 | } | |
600 | ||
601 | if (ctx->cipher->prov == NULL) | |
602 | goto legacy; | |
603 | ||
604 | blocksize = EVP_CIPHER_CTX_block_size(ctx); | |
605 | ||
606 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
607 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
608 | return 0; | |
609 | } | |
610 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, | |
611 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
612 | (size_t)inl); | |
613 | ||
614 | if (ret) { | |
615 | if (soutl > INT_MAX) { | |
616 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
617 | return 0; | |
618 | } | |
619 | *outl = soutl; | |
620 | } | |
621 | ||
622 | return ret; | |
623 | ||
624 | /* TODO(3.0): Remove legacy code below */ | |
625 | legacy: | |
626 | ||
627 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); | |
628 | } | |
629 | ||
630 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
631 | { | |
632 | int ret; | |
633 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
634 | return ret; | |
635 | } | |
636 | ||
637 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
638 | { | |
639 | int n, ret; | |
640 | unsigned int i, b, bl; | |
641 | size_t soutl; | |
642 | int blocksize; | |
643 | ||
644 | /* Prevent accidental use of decryption context when encrypting */ | |
645 | if (!ctx->encrypt) { | |
646 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
647 | return 0; | |
648 | } | |
649 | ||
650 | if (ctx->cipher == NULL) { | |
651 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
652 | return 0; | |
653 | } | |
654 | if (ctx->cipher->prov == NULL) | |
655 | goto legacy; | |
656 | ||
657 | blocksize = EVP_CIPHER_CTX_block_size(ctx); | |
658 | ||
659 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
660 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
661 | return 0; | |
662 | } | |
663 | ||
664 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, | |
665 | blocksize == 1 ? 0 : blocksize); | |
666 | ||
667 | if (ret) { | |
668 | if (soutl > INT_MAX) { | |
669 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
670 | return 0; | |
671 | } | |
672 | *outl = soutl; | |
673 | } | |
674 | ||
675 | return ret; | |
676 | ||
677 | /* TODO(3.0): Remove legacy code below */ | |
678 | legacy: | |
679 | ||
680 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
681 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
682 | if (ret < 0) | |
683 | return 0; | |
684 | else | |
685 | *outl = ret; | |
686 | return 1; | |
687 | } | |
688 | ||
689 | b = ctx->cipher->block_size; | |
690 | OPENSSL_assert(b <= sizeof(ctx->buf)); | |
691 | if (b == 1) { | |
692 | *outl = 0; | |
693 | return 1; | |
694 | } | |
695 | bl = ctx->buf_len; | |
696 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
697 | if (bl) { | |
698 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
699 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
700 | return 0; | |
701 | } | |
702 | *outl = 0; | |
703 | return 1; | |
704 | } | |
705 | ||
706 | n = b - bl; | |
707 | for (i = bl; i < b; i++) | |
708 | ctx->buf[i] = n; | |
709 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
710 | ||
711 | if (ret) | |
712 | *outl = b; | |
713 | ||
714 | return ret; | |
715 | } | |
716 | ||
717 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
718 | const unsigned char *in, int inl) | |
719 | { | |
720 | int fix_len, cmpl = inl, ret; | |
721 | unsigned int b; | |
722 | size_t soutl; | |
723 | int blocksize; | |
724 | ||
725 | /* Prevent accidental use of encryption context when decrypting */ | |
726 | if (ctx->encrypt) { | |
727 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
728 | return 0; | |
729 | } | |
730 | ||
731 | if (ctx->cipher == NULL) { | |
732 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
733 | return 0; | |
734 | } | |
735 | if (ctx->cipher->prov == NULL) | |
736 | goto legacy; | |
737 | ||
738 | blocksize = EVP_CIPHER_CTX_block_size(ctx); | |
739 | ||
740 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
741 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
742 | return 0; | |
743 | } | |
744 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, | |
745 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
746 | (size_t)inl); | |
747 | ||
748 | if (ret) { | |
749 | if (soutl > INT_MAX) { | |
750 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
751 | return 0; | |
752 | } | |
753 | *outl = soutl; | |
754 | } | |
755 | ||
756 | return ret; | |
757 | ||
758 | /* TODO(3.0): Remove legacy code below */ | |
759 | legacy: | |
760 | ||
761 | b = ctx->cipher->block_size; | |
762 | ||
763 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
764 | cmpl = (cmpl + 7) / 8; | |
765 | ||
766 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
767 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { | |
768 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
769 | return 0; | |
770 | } | |
771 | ||
772 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); | |
773 | if (fix_len < 0) { | |
774 | *outl = 0; | |
775 | return 0; | |
776 | } else | |
777 | *outl = fix_len; | |
778 | return 1; | |
779 | } | |
780 | ||
781 | if (inl <= 0) { | |
782 | *outl = 0; | |
783 | return inl == 0; | |
784 | } | |
785 | ||
786 | if (ctx->flags & EVP_CIPH_NO_PADDING) | |
787 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); | |
788 | ||
789 | OPENSSL_assert(b <= sizeof(ctx->final)); | |
790 | ||
791 | if (ctx->final_used) { | |
792 | /* see comment about PTRDIFF_T comparison above */ | |
793 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
794 | || is_partially_overlapping(out, in, b)) { | |
795 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
796 | return 0; | |
797 | } | |
798 | memcpy(out, ctx->final, b); | |
799 | out += b; | |
800 | fix_len = 1; | |
801 | } else | |
802 | fix_len = 0; | |
803 | ||
804 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) | |
805 | return 0; | |
806 | ||
807 | /* | |
808 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
809 | * copy of this last block | |
810 | */ | |
811 | if (b > 1 && !ctx->buf_len) { | |
812 | *outl -= b; | |
813 | ctx->final_used = 1; | |
814 | memcpy(ctx->final, &out[*outl], b); | |
815 | } else | |
816 | ctx->final_used = 0; | |
817 | ||
818 | if (fix_len) | |
819 | *outl += b; | |
820 | ||
821 | return 1; | |
822 | } | |
823 | ||
824 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
825 | { | |
826 | int ret; | |
827 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
828 | return ret; | |
829 | } | |
830 | ||
831 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
832 | { | |
833 | int i, n; | |
834 | unsigned int b; | |
835 | size_t soutl; | |
836 | int ret; | |
837 | int blocksize; | |
838 | ||
839 | /* Prevent accidental use of encryption context when decrypting */ | |
840 | if (ctx->encrypt) { | |
841 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
842 | return 0; | |
843 | } | |
844 | ||
845 | if (ctx->cipher == NULL) { | |
846 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
847 | return 0; | |
848 | } | |
849 | ||
850 | if (ctx->cipher->prov == NULL) | |
851 | goto legacy; | |
852 | ||
853 | blocksize = EVP_CIPHER_CTX_block_size(ctx); | |
854 | ||
855 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
856 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
857 | return 0; | |
858 | } | |
859 | ||
860 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, | |
861 | blocksize == 1 ? 0 : blocksize); | |
862 | ||
863 | if (ret) { | |
864 | if (soutl > INT_MAX) { | |
865 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
866 | return 0; | |
867 | } | |
868 | *outl = soutl; | |
869 | } | |
870 | ||
871 | return ret; | |
872 | ||
873 | /* TODO(3.0): Remove legacy code below */ | |
874 | legacy: | |
875 | ||
876 | *outl = 0; | |
877 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
878 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
879 | if (i < 0) | |
880 | return 0; | |
881 | else | |
882 | *outl = i; | |
883 | return 1; | |
884 | } | |
885 | ||
886 | b = ctx->cipher->block_size; | |
887 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
888 | if (ctx->buf_len) { | |
889 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
890 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
891 | return 0; | |
892 | } | |
893 | *outl = 0; | |
894 | return 1; | |
895 | } | |
896 | if (b > 1) { | |
897 | if (ctx->buf_len || !ctx->final_used) { | |
898 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
899 | return 0; | |
900 | } | |
901 | OPENSSL_assert(b <= sizeof(ctx->final)); | |
902 | ||
903 | /* | |
904 | * The following assumes that the ciphertext has been authenticated. | |
905 | * Otherwise it provides a padding oracle. | |
906 | */ | |
907 | n = ctx->final[b - 1]; | |
908 | if (n == 0 || n > (int)b) { | |
909 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
910 | return 0; | |
911 | } | |
912 | for (i = 0; i < n; i++) { | |
913 | if (ctx->final[--b] != n) { | |
914 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
915 | return 0; | |
916 | } | |
917 | } | |
918 | n = ctx->cipher->block_size - n; | |
919 | for (i = 0; i < n; i++) | |
920 | out[i] = ctx->final[i]; | |
921 | *outl = n; | |
922 | } else | |
923 | *outl = 0; | |
924 | return 1; | |
925 | } | |
926 | ||
927 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) | |
928 | { | |
929 | int ok; | |
930 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
931 | ||
932 | params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_KEYLEN, &keylen); | |
933 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params); | |
934 | ||
935 | if (ok != EVP_CTRL_RET_UNSUPPORTED) | |
936 | return ok; | |
937 | ||
938 | /* TODO(3.0) legacy code follows */ | |
939 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) | |
940 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
941 | if (EVP_CIPHER_CTX_key_length(c) == keylen) | |
942 | return 1; | |
943 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
944 | c->key_len = keylen; | |
945 | return 1; | |
946 | } | |
947 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
948 | return 0; | |
949 | } | |
950 | ||
951 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) | |
952 | { | |
953 | int ok; | |
954 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
955 | ||
956 | if (pad) | |
957 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
958 | else | |
959 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
960 | ||
961 | params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_PADDING, &pad); | |
962 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
963 | ||
964 | return ok != 0; | |
965 | } | |
966 | ||
967 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) | |
968 | { | |
969 | int ret = EVP_CTRL_RET_UNSUPPORTED; | |
970 | int set_params = 1; | |
971 | size_t sz; | |
972 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
973 | ||
974 | if (ctx == NULL || ctx->cipher == NULL) { | |
975 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); | |
976 | return 0; | |
977 | } | |
978 | ||
979 | if (ctx->cipher->prov == NULL) | |
980 | goto legacy; | |
981 | ||
982 | switch (type) { | |
983 | case EVP_CTRL_SET_KEY_LENGTH: | |
984 | params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_KEYLEN, &arg); | |
985 | break; | |
986 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
987 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ | |
988 | case EVP_CTRL_INIT: /* TODO(3.0) Purely legacy, no provider counterpart */ | |
989 | default: | |
990 | return EVP_CTRL_RET_UNSUPPORTED; | |
991 | case EVP_CTRL_GET_IV: | |
992 | set_params = 0; | |
993 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, | |
994 | ptr, (size_t)arg); | |
995 | break; | |
996 | case EVP_CTRL_AEAD_SET_IVLEN: | |
997 | if (arg < 0) | |
998 | return 0; | |
999 | sz = (size_t)arg; | |
1000 | params[0] = | |
1001 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN, &sz); | |
1002 | break; | |
1003 | case EVP_CTRL_GCM_SET_IV_FIXED: | |
1004 | params[0] = | |
1005 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, | |
1006 | ptr, (size_t)arg); | |
1007 | break; | |
1008 | case EVP_CTRL_AEAD_SET_TAG: | |
1009 | params[0] = | |
1010 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, | |
1011 | ptr, (size_t)arg); | |
1012 | break; | |
1013 | case EVP_CTRL_AEAD_GET_TAG: | |
1014 | set_params = 0; | |
1015 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, | |
1016 | ptr, (size_t)arg); | |
1017 | break; | |
1018 | case EVP_CTRL_AEAD_TLS1_AAD: | |
1019 | /* This one does a set and a get - since it returns a padding size */ | |
1020 | params[0] = | |
1021 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1022 | ptr, (size_t)arg); | |
1023 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1024 | if (ret <= 0) | |
1025 | return ret; | |
1026 | params[0] = | |
1027 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1028 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1029 | if (ret <= 0) | |
1030 | return 0; | |
1031 | return sz; | |
1032 | } | |
1033 | ||
1034 | if (set_params) | |
1035 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1036 | else | |
1037 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1038 | return ret; | |
1039 | ||
1040 | /* TODO(3.0): Remove legacy code below */ | |
1041 | legacy: | |
1042 | if (ctx->cipher->ctrl == NULL) { | |
1043 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
1048 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { | |
1049 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, | |
1050 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
1051 | return 0; | |
1052 | } | |
1053 | return ret; | |
1054 | } | |
1055 | ||
1056 | #if !defined(FIPS_MODE) | |
1057 | /* TODO(3.0): No support for RAND yet in the FIPS module */ | |
1058 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) | |
1059 | { | |
1060 | int kl; | |
1061 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1062 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
1063 | kl = EVP_CIPHER_CTX_key_length(ctx); | |
1064 | if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0) | |
1065 | return 0; | |
1066 | return 1; | |
1067 | } | |
1068 | #endif | |
1069 | ||
1070 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) | |
1071 | { | |
1072 | if ((in == NULL) || (in->cipher == NULL)) { | |
1073 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | if (in->cipher->prov == NULL) | |
1078 | goto legacy; | |
1079 | ||
1080 | if (in->cipher->dupctx == NULL) { | |
1081 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | EVP_CIPHER_CTX_reset(out); | |
1086 | ||
1087 | *out = *in; | |
1088 | out->provctx = NULL; | |
1089 | ||
1090 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { | |
1091 | out->fetched_cipher = NULL; | |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | out->provctx = in->cipher->dupctx(in->provctx); | |
1096 | if (out->provctx == NULL) { | |
1097 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | return 1; | |
1102 | ||
1103 | /* TODO(3.0): Remove legacy code below */ | |
1104 | legacy: | |
1105 | ||
1106 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) | |
1107 | /* Make sure it's safe to copy a cipher context using an ENGINE */ | |
1108 | if (in->engine && !ENGINE_init(in->engine)) { | |
1109 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
1110 | return 0; | |
1111 | } | |
1112 | #endif | |
1113 | ||
1114 | EVP_CIPHER_CTX_reset(out); | |
1115 | memcpy(out, in, sizeof(*out)); | |
1116 | ||
1117 | if (in->cipher_data && in->cipher->ctx_size) { | |
1118 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
1119 | if (out->cipher_data == NULL) { | |
1120 | out->cipher = NULL; | |
1121 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); | |
1122 | return 0; | |
1123 | } | |
1124 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1125 | } | |
1126 | ||
1127 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
1128 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { | |
1129 | out->cipher = NULL; | |
1130 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
1131 | return 0; | |
1132 | } | |
1133 | return 1; | |
1134 | } | |
1135 | ||
1136 | static void *evp_cipher_from_dispatch(const char *name, | |
1137 | const OSSL_DISPATCH *fns, | |
1138 | OSSL_PROVIDER *prov) | |
1139 | { | |
1140 | EVP_CIPHER *cipher = NULL; | |
1141 | int fnciphcnt = 0, fnctxcnt = 0; | |
1142 | ||
1143 | /* | |
1144 | * The legacy NID is set by EVP_CIPHER_fetch() if the name exists in | |
1145 | * the object database. | |
1146 | */ | |
1147 | if ((cipher = EVP_CIPHER_meth_new(0, 0, 0)) == NULL | |
1148 | || (cipher->name = OPENSSL_strdup(name)) == NULL) { | |
1149 | EVP_CIPHER_meth_free(cipher); | |
1150 | EVPerr(0, ERR_R_MALLOC_FAILURE); | |
1151 | return NULL; | |
1152 | } | |
1153 | ||
1154 | for (; fns->function_id != 0; fns++) { | |
1155 | switch (fns->function_id) { | |
1156 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1157 | if (cipher->newctx != NULL) | |
1158 | break; | |
1159 | cipher->newctx = OSSL_get_OP_cipher_newctx(fns); | |
1160 | fnctxcnt++; | |
1161 | break; | |
1162 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1163 | if (cipher->einit != NULL) | |
1164 | break; | |
1165 | cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns); | |
1166 | fnciphcnt++; | |
1167 | break; | |
1168 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1169 | if (cipher->dinit != NULL) | |
1170 | break; | |
1171 | cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns); | |
1172 | fnciphcnt++; | |
1173 | break; | |
1174 | case OSSL_FUNC_CIPHER_UPDATE: | |
1175 | if (cipher->cupdate != NULL) | |
1176 | break; | |
1177 | cipher->cupdate = OSSL_get_OP_cipher_update(fns); | |
1178 | fnciphcnt++; | |
1179 | break; | |
1180 | case OSSL_FUNC_CIPHER_FINAL: | |
1181 | if (cipher->cfinal != NULL) | |
1182 | break; | |
1183 | cipher->cfinal = OSSL_get_OP_cipher_final(fns); | |
1184 | fnciphcnt++; | |
1185 | break; | |
1186 | case OSSL_FUNC_CIPHER_CIPHER: | |
1187 | if (cipher->ccipher != NULL) | |
1188 | break; | |
1189 | cipher->ccipher = OSSL_get_OP_cipher_cipher(fns); | |
1190 | break; | |
1191 | case OSSL_FUNC_CIPHER_FREECTX: | |
1192 | if (cipher->freectx != NULL) | |
1193 | break; | |
1194 | cipher->freectx = OSSL_get_OP_cipher_freectx(fns); | |
1195 | fnctxcnt++; | |
1196 | break; | |
1197 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1198 | if (cipher->dupctx != NULL) | |
1199 | break; | |
1200 | cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns); | |
1201 | break; | |
1202 | case OSSL_FUNC_CIPHER_GET_PARAMS: | |
1203 | if (cipher->get_params != NULL) | |
1204 | break; | |
1205 | cipher->get_params = OSSL_get_OP_cipher_get_params(fns); | |
1206 | break; | |
1207 | case OSSL_FUNC_CIPHER_CTX_GET_PARAMS: | |
1208 | if (cipher->ctx_get_params != NULL) | |
1209 | break; | |
1210 | cipher->ctx_get_params = OSSL_get_OP_cipher_ctx_get_params(fns); | |
1211 | break; | |
1212 | case OSSL_FUNC_CIPHER_CTX_SET_PARAMS: | |
1213 | if (cipher->ctx_set_params != NULL) | |
1214 | break; | |
1215 | cipher->ctx_set_params = OSSL_get_OP_cipher_ctx_set_params(fns); | |
1216 | break; | |
1217 | } | |
1218 | } | |
1219 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) | |
1220 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
1221 | || fnctxcnt != 2) { | |
1222 | /* | |
1223 | * In order to be a consistent set of functions we must have at least | |
1224 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
1225 | * functions, or a single "cipher" function. In all cases we need both | |
1226 | * the "newctx" and "freectx" functions. | |
1227 | */ | |
1228 | EVP_CIPHER_meth_free(cipher); | |
1229 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); | |
1230 | return NULL; | |
1231 | } | |
1232 | cipher->prov = prov; | |
1233 | if (prov != NULL) | |
1234 | ossl_provider_up_ref(prov); | |
1235 | ||
1236 | return cipher; | |
1237 | } | |
1238 | ||
1239 | static int evp_cipher_up_ref(void *cipher) | |
1240 | { | |
1241 | return EVP_CIPHER_up_ref(cipher); | |
1242 | } | |
1243 | ||
1244 | static void evp_cipher_free(void *cipher) | |
1245 | { | |
1246 | EVP_CIPHER_meth_free(cipher); | |
1247 | } | |
1248 | ||
1249 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, | |
1250 | const char *properties) | |
1251 | { | |
1252 | EVP_CIPHER *cipher = | |
1253 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
1254 | evp_cipher_from_dispatch, evp_cipher_up_ref, | |
1255 | evp_cipher_free); | |
1256 | ||
1257 | #ifndef FIPS_MODE | |
1258 | /* TODO(3.x) get rid of the need for legacy NIDs */ | |
1259 | if (cipher != NULL) { | |
1260 | /* | |
1261 | * FIPS module note: since internal fetches will be entirely | |
1262 | * provider based, we know that none of its code depends on legacy | |
1263 | * NIDs or any functionality that use them. | |
1264 | */ | |
1265 | cipher->nid = OBJ_sn2nid(algorithm); | |
1266 | } | |
1267 | #endif | |
1268 | ||
1269 | return cipher; | |
1270 | } | |
1271 | ||
1272 | void EVP_CIPHER_do_all_ex(OPENSSL_CTX *libctx, | |
1273 | void (*fn)(EVP_CIPHER *mac, void *arg), | |
1274 | void *arg) | |
1275 | { | |
1276 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1277 | (void (*)(void *, void *))fn, arg, | |
1278 | evp_cipher_from_dispatch, evp_cipher_free); | |
1279 | } |