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1 | /* | |
2 | * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | /* We need to use some engine deprecated APIs */ | |
11 | #define OPENSSL_SUPPRESS_DEPRECATED | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <limits.h> | |
15 | #include <assert.h> | |
16 | #include <openssl/evp.h> | |
17 | #include <openssl/err.h> | |
18 | #include <openssl/rand.h> | |
19 | #include <openssl/engine.h> | |
20 | #include <openssl/params.h> | |
21 | #include <openssl/core_names.h> | |
22 | #include "internal/cryptlib.h" | |
23 | #include "internal/provider.h" | |
24 | #include "internal/core.h" | |
25 | #include "crypto/evp.h" | |
26 | #include "evp_local.h" | |
27 | ||
28 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) | |
29 | { | |
30 | if (ctx == NULL) | |
31 | return 1; | |
32 | ||
33 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) | |
34 | goto legacy; | |
35 | ||
36 | if (ctx->algctx != NULL) { | |
37 | if (ctx->cipher->freectx != NULL) | |
38 | ctx->cipher->freectx(ctx->algctx); | |
39 | ctx->algctx = NULL; | |
40 | } | |
41 | if (ctx->fetched_cipher != NULL) | |
42 | EVP_CIPHER_free(ctx->fetched_cipher); | |
43 | memset(ctx, 0, sizeof(*ctx)); | |
44 | ||
45 | return 1; | |
46 | ||
47 | /* Remove legacy code below when legacy support is removed. */ | |
48 | legacy: | |
49 | ||
50 | if (ctx->cipher != NULL) { | |
51 | if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) | |
52 | return 0; | |
53 | /* Cleanse cipher context data */ | |
54 | if (ctx->cipher_data && ctx->cipher->ctx_size) | |
55 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
56 | } | |
57 | OPENSSL_free(ctx->cipher_data); | |
58 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) | |
59 | ENGINE_finish(ctx->engine); | |
60 | #endif | |
61 | memset(ctx, 0, sizeof(*ctx)); | |
62 | return 1; | |
63 | } | |
64 | ||
65 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) | |
66 | { | |
67 | return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX)); | |
68 | } | |
69 | ||
70 | void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) | |
71 | { | |
72 | if (ctx == NULL) | |
73 | return; | |
74 | EVP_CIPHER_CTX_reset(ctx); | |
75 | OPENSSL_free(ctx); | |
76 | } | |
77 | ||
78 | static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx, | |
79 | const EVP_CIPHER *cipher, | |
80 | ENGINE *impl, const unsigned char *key, | |
81 | const unsigned char *iv, int enc, | |
82 | const OSSL_PARAM params[]) | |
83 | { | |
84 | int n; | |
85 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) | |
86 | ENGINE *tmpimpl = NULL; | |
87 | #endif | |
88 | /* | |
89 | * enc == 1 means we are encrypting. | |
90 | * enc == 0 means we are decrypting. | |
91 | * enc == -1 means, use the previously initialised value for encrypt/decrypt | |
92 | */ | |
93 | if (enc == -1) { | |
94 | enc = ctx->encrypt; | |
95 | } else { | |
96 | if (enc) | |
97 | enc = 1; | |
98 | ctx->encrypt = enc; | |
99 | } | |
100 | ||
101 | if (cipher == NULL && ctx->cipher == NULL) { | |
102 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | /* Code below to be removed when legacy support is dropped. */ | |
107 | ||
108 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) | |
109 | /* | |
110 | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so | |
111 | * this context may already have an ENGINE! Try to avoid releasing the | |
112 | * previous handle, re-querying for an ENGINE, and having a | |
113 | * reinitialisation, when it may all be unnecessary. | |
114 | */ | |
115 | if (ctx->engine && ctx->cipher | |
116 | && (cipher == NULL || cipher->nid == ctx->cipher->nid)) | |
117 | goto skip_to_init; | |
118 | ||
119 | if (cipher != NULL && impl == NULL) { | |
120 | /* Ask if an ENGINE is reserved for this job */ | |
121 | tmpimpl = ENGINE_get_cipher_engine(cipher->nid); | |
122 | } | |
123 | #endif | |
124 | ||
125 | /* | |
126 | * If there are engines involved then we should use legacy handling for now. | |
127 | */ | |
128 | if (ctx->engine != NULL | |
129 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) | |
130 | || tmpimpl != NULL | |
131 | #endif | |
132 | || impl != NULL) { | |
133 | if (ctx->cipher == ctx->fetched_cipher) | |
134 | ctx->cipher = NULL; | |
135 | EVP_CIPHER_free(ctx->fetched_cipher); | |
136 | ctx->fetched_cipher = NULL; | |
137 | goto legacy; | |
138 | } | |
139 | /* | |
140 | * Ensure a context left lying around from last time is cleared | |
141 | * (legacy code) | |
142 | */ | |
143 | if (cipher != NULL && ctx->cipher != NULL) { | |
144 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
145 | ctx->cipher_data = NULL; | |
146 | } | |
147 | ||
148 | ||
149 | /* Start of non-legacy code below */ | |
150 | ||
151 | /* Ensure a context left lying around from last time is cleared */ | |
152 | if (cipher != NULL && ctx->cipher != NULL) { | |
153 | unsigned long flags = ctx->flags; | |
154 | ||
155 | EVP_CIPHER_CTX_reset(ctx); | |
156 | /* Restore encrypt and flags */ | |
157 | ctx->encrypt = enc; | |
158 | ctx->flags = flags; | |
159 | } | |
160 | ||
161 | if (cipher == NULL) | |
162 | cipher = ctx->cipher; | |
163 | ||
164 | if (cipher->prov == NULL) { | |
165 | #ifdef FIPS_MODULE | |
166 | /* We only do explicit fetches inside the FIPS module */ | |
167 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
168 | return 0; | |
169 | #else | |
170 | EVP_CIPHER *provciph = | |
171 | EVP_CIPHER_fetch(NULL, | |
172 | cipher->nid == NID_undef ? "NULL" | |
173 | : OBJ_nid2sn(cipher->nid), | |
174 | ""); | |
175 | ||
176 | if (provciph == NULL) | |
177 | return 0; | |
178 | cipher = provciph; | |
179 | EVP_CIPHER_free(ctx->fetched_cipher); | |
180 | ctx->fetched_cipher = provciph; | |
181 | #endif | |
182 | } | |
183 | ||
184 | if (cipher->prov != NULL) { | |
185 | if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) { | |
186 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
187 | return 0; | |
188 | } | |
189 | EVP_CIPHER_free(ctx->fetched_cipher); | |
190 | ctx->fetched_cipher = (EVP_CIPHER *)cipher; | |
191 | } | |
192 | ctx->cipher = cipher; | |
193 | if (ctx->algctx == NULL) { | |
194 | ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); | |
195 | if (ctx->algctx == NULL) { | |
196 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
197 | return 0; | |
198 | } | |
199 | } | |
200 | ||
201 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
202 | /* | |
203 | * If this ctx was already set up for no padding then we need to tell | |
204 | * the new cipher about it. | |
205 | */ | |
206 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
207 | return 0; | |
208 | } | |
209 | ||
210 | if (enc) { | |
211 | if (ctx->cipher->einit == NULL) { | |
212 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
213 | return 0; | |
214 | } | |
215 | ||
216 | return ctx->cipher->einit(ctx->algctx, | |
217 | key, | |
218 | key == NULL ? 0 | |
219 | : EVP_CIPHER_CTX_key_length(ctx), | |
220 | iv, | |
221 | iv == NULL ? 0 | |
222 | : EVP_CIPHER_CTX_iv_length(ctx), | |
223 | params); | |
224 | } | |
225 | ||
226 | if (ctx->cipher->dinit == NULL) { | |
227 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
228 | return 0; | |
229 | } | |
230 | ||
231 | return ctx->cipher->dinit(ctx->algctx, | |
232 | key, | |
233 | key == NULL ? 0 | |
234 | : EVP_CIPHER_CTX_key_length(ctx), | |
235 | iv, | |
236 | iv == NULL ? 0 | |
237 | : EVP_CIPHER_CTX_iv_length(ctx), | |
238 | params); | |
239 | ||
240 | /* Code below to be removed when legacy support is dropped. */ | |
241 | legacy: | |
242 | ||
243 | if (cipher != NULL) { | |
244 | /* | |
245 | * Ensure a context left lying around from last time is cleared (we | |
246 | * previously attempted to avoid this if the same ENGINE and | |
247 | * EVP_CIPHER could be used). | |
248 | */ | |
249 | if (ctx->cipher) { | |
250 | unsigned long flags = ctx->flags; | |
251 | EVP_CIPHER_CTX_reset(ctx); | |
252 | /* Restore encrypt and flags */ | |
253 | ctx->encrypt = enc; | |
254 | ctx->flags = flags; | |
255 | } | |
256 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) | |
257 | if (impl != NULL) { | |
258 | if (!ENGINE_init(impl)) { | |
259 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
260 | return 0; | |
261 | } | |
262 | } else { | |
263 | impl = tmpimpl; | |
264 | } | |
265 | if (impl != NULL) { | |
266 | /* There's an ENGINE for this job ... (apparently) */ | |
267 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
268 | ||
269 | if (c == NULL) { | |
270 | /* | |
271 | * One positive side-effect of US's export control history, | |
272 | * is that we should at least be able to avoid using US | |
273 | * misspellings of "initialisation"? | |
274 | */ | |
275 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
276 | return 0; | |
277 | } | |
278 | /* We'll use the ENGINE's private cipher definition */ | |
279 | cipher = c; | |
280 | /* | |
281 | * Store the ENGINE functional reference so we know 'cipher' came | |
282 | * from an ENGINE and we need to release it when done. | |
283 | */ | |
284 | ctx->engine = impl; | |
285 | } else { | |
286 | ctx->engine = NULL; | |
287 | } | |
288 | #endif | |
289 | ||
290 | ctx->cipher = cipher; | |
291 | if (ctx->cipher->ctx_size) { | |
292 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); | |
293 | if (ctx->cipher_data == NULL) { | |
294 | ctx->cipher = NULL; | |
295 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); | |
296 | return 0; | |
297 | } | |
298 | } else { | |
299 | ctx->cipher_data = NULL; | |
300 | } | |
301 | ctx->key_len = cipher->key_len; | |
302 | /* Preserve wrap enable flag, zero everything else */ | |
303 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
304 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
305 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
306 | ctx->cipher = NULL; | |
307 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
308 | return 0; | |
309 | } | |
310 | } | |
311 | } | |
312 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) | |
313 | skip_to_init: | |
314 | #endif | |
315 | if (ctx->cipher == NULL) | |
316 | return 0; | |
317 | ||
318 | /* we assume block size is a power of 2 in *cryptUpdate */ | |
319 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
320 | || ctx->cipher->block_size == 8 | |
321 | || ctx->cipher->block_size == 16); | |
322 | ||
323 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
324 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
325 | ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
326 | return 0; | |
327 | } | |
328 | ||
329 | if ((EVP_CIPHER_flags(EVP_CIPHER_CTX_get0_cipher(ctx)) | |
330 | & EVP_CIPH_CUSTOM_IV) == 0) { | |
331 | switch (EVP_CIPHER_CTX_mode(ctx)) { | |
332 | ||
333 | case EVP_CIPH_STREAM_CIPHER: | |
334 | case EVP_CIPH_ECB_MODE: | |
335 | break; | |
336 | ||
337 | case EVP_CIPH_CFB_MODE: | |
338 | case EVP_CIPH_OFB_MODE: | |
339 | ||
340 | ctx->num = 0; | |
341 | /* fall-through */ | |
342 | ||
343 | case EVP_CIPH_CBC_MODE: | |
344 | n = EVP_CIPHER_CTX_iv_length(ctx); | |
345 | if (!ossl_assert(n >= 0 && n <= (int)sizeof(ctx->iv))) | |
346 | return 0; | |
347 | if (iv) | |
348 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
349 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
350 | break; | |
351 | ||
352 | case EVP_CIPH_CTR_MODE: | |
353 | ctx->num = 0; | |
354 | /* Don't reuse IV for CTR mode */ | |
355 | if (iv) | |
356 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
357 | break; | |
358 | ||
359 | default: | |
360 | return 0; | |
361 | } | |
362 | } | |
363 | ||
364 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
365 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
366 | return 0; | |
367 | } | |
368 | ctx->buf_len = 0; | |
369 | ctx->final_used = 0; | |
370 | ctx->block_mask = ctx->cipher->block_size - 1; | |
371 | return 1; | |
372 | } | |
373 | ||
374 | int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
375 | const unsigned char *key, const unsigned char *iv, | |
376 | int enc, const OSSL_PARAM params[]) | |
377 | { | |
378 | return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params); | |
379 | } | |
380 | ||
381 | int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
382 | const unsigned char *key, const unsigned char *iv, int enc) | |
383 | { | |
384 | if (cipher != NULL) | |
385 | EVP_CIPHER_CTX_reset(ctx); | |
386 | return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL); | |
387 | } | |
388 | ||
389 | int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
390 | ENGINE *impl, const unsigned char *key, | |
391 | const unsigned char *iv, int enc) | |
392 | { | |
393 | return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL); | |
394 | } | |
395 | ||
396 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
397 | const unsigned char *in, int inl) | |
398 | { | |
399 | if (ctx->encrypt) | |
400 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
401 | else | |
402 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
403 | } | |
404 | ||
405 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
406 | { | |
407 | if (ctx->encrypt) | |
408 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
409 | else | |
410 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
411 | } | |
412 | ||
413 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
414 | { | |
415 | if (ctx->encrypt) | |
416 | return EVP_EncryptFinal(ctx, out, outl); | |
417 | else | |
418 | return EVP_DecryptFinal(ctx, out, outl); | |
419 | } | |
420 | ||
421 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
422 | const unsigned char *key, const unsigned char *iv) | |
423 | { | |
424 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
425 | } | |
426 | ||
427 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
428 | ENGINE *impl, const unsigned char *key, | |
429 | const unsigned char *iv) | |
430 | { | |
431 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
432 | } | |
433 | ||
434 | int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
435 | const unsigned char *key, const unsigned char *iv, | |
436 | const OSSL_PARAM params[]) | |
437 | { | |
438 | return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params); | |
439 | } | |
440 | ||
441 | int EVP_DecryptInit(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, 0); | |
445 | } | |
446 | ||
447 | int EVP_DecryptInit_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, 0); | |
452 | } | |
453 | ||
454 | int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
455 | const unsigned char *key, const unsigned char *iv, | |
456 | const OSSL_PARAM params[]) | |
457 | { | |
458 | return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params); | |
459 | } | |
460 | ||
461 | /* | |
462 | * According to the letter of standard difference between pointers | |
463 | * is specified to be valid only within same object. This makes | |
464 | * it formally challenging to determine if input and output buffers | |
465 | * are not partially overlapping with standard pointer arithmetic. | |
466 | */ | |
467 | #ifdef PTRDIFF_T | |
468 | # undef PTRDIFF_T | |
469 | #endif | |
470 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
471 | /* | |
472 | * Then we have VMS that distinguishes itself by adhering to | |
473 | * sizeof(size_t)==4 even in 64-bit builds, which means that | |
474 | * difference between two pointers might be truncated to 32 bits. | |
475 | * In the context one can even wonder how comparison for | |
476 | * equality is implemented. To be on the safe side we adhere to | |
477 | * PTRDIFF_T even for comparison for equality. | |
478 | */ | |
479 | # define PTRDIFF_T uint64_t | |
480 | #else | |
481 | # define PTRDIFF_T size_t | |
482 | #endif | |
483 | ||
484 | int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len) | |
485 | { | |
486 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
487 | /* | |
488 | * Check for partially overlapping buffers. [Binary logical | |
489 | * operations are used instead of boolean to minimize number | |
490 | * of conditional branches.] | |
491 | */ | |
492 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | | |
493 | (diff > (0 - (PTRDIFF_T)len))); | |
494 | ||
495 | return overlapped; | |
496 | } | |
497 | ||
498 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, | |
499 | unsigned char *out, int *outl, | |
500 | const unsigned char *in, int inl) | |
501 | { | |
502 | int i, j, bl, cmpl = inl; | |
503 | ||
504 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
505 | cmpl = (cmpl + 7) / 8; | |
506 | ||
507 | bl = ctx->cipher->block_size; | |
508 | ||
509 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
510 | /* If block size > 1 then the cipher will have to do this check */ | |
511 | if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { | |
512 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); | |
513 | return 0; | |
514 | } | |
515 | ||
516 | i = ctx->cipher->do_cipher(ctx, out, in, inl); | |
517 | if (i < 0) | |
518 | return 0; | |
519 | else | |
520 | *outl = i; | |
521 | return 1; | |
522 | } | |
523 | ||
524 | if (inl <= 0) { | |
525 | *outl = 0; | |
526 | return inl == 0; | |
527 | } | |
528 | if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { | |
529 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); | |
530 | return 0; | |
531 | } | |
532 | ||
533 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
534 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
535 | *outl = inl; | |
536 | return 1; | |
537 | } else { | |
538 | *outl = 0; | |
539 | return 0; | |
540 | } | |
541 | } | |
542 | i = ctx->buf_len; | |
543 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); | |
544 | if (i != 0) { | |
545 | if (bl - i > inl) { | |
546 | memcpy(&(ctx->buf[i]), in, inl); | |
547 | ctx->buf_len += inl; | |
548 | *outl = 0; | |
549 | return 1; | |
550 | } else { | |
551 | j = bl - i; | |
552 | ||
553 | /* | |
554 | * Once we've processed the first j bytes from in, the amount of | |
555 | * data left that is a multiple of the block length is: | |
556 | * (inl - j) & ~(bl - 1) | |
557 | * We must ensure that this amount of data, plus the one block that | |
558 | * we process from ctx->buf does not exceed INT_MAX | |
559 | */ | |
560 | if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) { | |
561 | ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); | |
562 | return 0; | |
563 | } | |
564 | memcpy(&(ctx->buf[i]), in, j); | |
565 | inl -= j; | |
566 | in += j; | |
567 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) | |
568 | return 0; | |
569 | out += bl; | |
570 | *outl = bl; | |
571 | } | |
572 | } else | |
573 | *outl = 0; | |
574 | i = inl & (bl - 1); | |
575 | inl -= i; | |
576 | if (inl > 0) { | |
577 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
578 | return 0; | |
579 | *outl += inl; | |
580 | } | |
581 | ||
582 | if (i != 0) | |
583 | memcpy(ctx->buf, &(in[inl]), i); | |
584 | ctx->buf_len = i; | |
585 | return 1; | |
586 | } | |
587 | ||
588 | ||
589 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
590 | const unsigned char *in, int inl) | |
591 | { | |
592 | int ret; | |
593 | size_t soutl; | |
594 | int blocksize; | |
595 | ||
596 | if (outl != NULL) { | |
597 | *outl = 0; | |
598 | } else { | |
599 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); | |
600 | return 0; | |
601 | } | |
602 | ||
603 | /* Prevent accidental use of decryption context when encrypting */ | |
604 | if (!ctx->encrypt) { | |
605 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); | |
606 | return 0; | |
607 | } | |
608 | ||
609 | if (ctx->cipher == NULL) { | |
610 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); | |
611 | return 0; | |
612 | } | |
613 | ||
614 | if (ctx->cipher->prov == NULL) | |
615 | goto legacy; | |
616 | ||
617 | blocksize = ctx->cipher->block_size; | |
618 | ||
619 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
620 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); | |
621 | return 0; | |
622 | } | |
623 | ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl, | |
624 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
625 | (size_t)inl); | |
626 | ||
627 | if (ret) { | |
628 | if (soutl > INT_MAX) { | |
629 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); | |
630 | return 0; | |
631 | } | |
632 | *outl = soutl; | |
633 | } | |
634 | ||
635 | return ret; | |
636 | ||
637 | /* Code below to be removed when legacy support is dropped. */ | |
638 | legacy: | |
639 | ||
640 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); | |
641 | } | |
642 | ||
643 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
644 | { | |
645 | int ret; | |
646 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
647 | return ret; | |
648 | } | |
649 | ||
650 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
651 | { | |
652 | int n, ret; | |
653 | unsigned int i, b, bl; | |
654 | size_t soutl; | |
655 | int blocksize; | |
656 | ||
657 | if (outl != NULL) { | |
658 | *outl = 0; | |
659 | } else { | |
660 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); | |
661 | return 0; | |
662 | } | |
663 | ||
664 | /* Prevent accidental use of decryption context when encrypting */ | |
665 | if (!ctx->encrypt) { | |
666 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); | |
667 | return 0; | |
668 | } | |
669 | ||
670 | if (ctx->cipher == NULL) { | |
671 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); | |
672 | return 0; | |
673 | } | |
674 | if (ctx->cipher->prov == NULL) | |
675 | goto legacy; | |
676 | ||
677 | blocksize = EVP_CIPHER_CTX_block_size(ctx); | |
678 | ||
679 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
680 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); | |
681 | return 0; | |
682 | } | |
683 | ||
684 | ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl, | |
685 | blocksize == 1 ? 0 : blocksize); | |
686 | ||
687 | if (ret) { | |
688 | if (soutl > INT_MAX) { | |
689 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); | |
690 | return 0; | |
691 | } | |
692 | *outl = soutl; | |
693 | } | |
694 | ||
695 | return ret; | |
696 | ||
697 | /* Code below to be removed when legacy support is dropped. */ | |
698 | legacy: | |
699 | ||
700 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
701 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
702 | if (ret < 0) | |
703 | return 0; | |
704 | else | |
705 | *outl = ret; | |
706 | return 1; | |
707 | } | |
708 | ||
709 | b = ctx->cipher->block_size; | |
710 | OPENSSL_assert(b <= sizeof(ctx->buf)); | |
711 | if (b == 1) { | |
712 | *outl = 0; | |
713 | return 1; | |
714 | } | |
715 | bl = ctx->buf_len; | |
716 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
717 | if (bl) { | |
718 | ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
719 | return 0; | |
720 | } | |
721 | *outl = 0; | |
722 | return 1; | |
723 | } | |
724 | ||
725 | n = b - bl; | |
726 | for (i = bl; i < b; i++) | |
727 | ctx->buf[i] = n; | |
728 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
729 | ||
730 | if (ret) | |
731 | *outl = b; | |
732 | ||
733 | return ret; | |
734 | } | |
735 | ||
736 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
737 | const unsigned char *in, int inl) | |
738 | { | |
739 | int fix_len, cmpl = inl, ret; | |
740 | unsigned int b; | |
741 | size_t soutl; | |
742 | int blocksize; | |
743 | ||
744 | if (outl != NULL) { | |
745 | *outl = 0; | |
746 | } else { | |
747 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); | |
748 | return 0; | |
749 | } | |
750 | ||
751 | /* Prevent accidental use of encryption context when decrypting */ | |
752 | if (ctx->encrypt) { | |
753 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); | |
754 | return 0; | |
755 | } | |
756 | ||
757 | if (ctx->cipher == NULL) { | |
758 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); | |
759 | return 0; | |
760 | } | |
761 | if (ctx->cipher->prov == NULL) | |
762 | goto legacy; | |
763 | ||
764 | blocksize = EVP_CIPHER_CTX_block_size(ctx); | |
765 | ||
766 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
767 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); | |
768 | return 0; | |
769 | } | |
770 | ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl, | |
771 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
772 | (size_t)inl); | |
773 | ||
774 | if (ret) { | |
775 | if (soutl > INT_MAX) { | |
776 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); | |
777 | return 0; | |
778 | } | |
779 | *outl = soutl; | |
780 | } | |
781 | ||
782 | return ret; | |
783 | ||
784 | /* Code below to be removed when legacy support is dropped. */ | |
785 | legacy: | |
786 | ||
787 | b = ctx->cipher->block_size; | |
788 | ||
789 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
790 | cmpl = (cmpl + 7) / 8; | |
791 | ||
792 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
793 | if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { | |
794 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); | |
795 | return 0; | |
796 | } | |
797 | ||
798 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); | |
799 | if (fix_len < 0) { | |
800 | *outl = 0; | |
801 | return 0; | |
802 | } else | |
803 | *outl = fix_len; | |
804 | return 1; | |
805 | } | |
806 | ||
807 | if (inl <= 0) { | |
808 | *outl = 0; | |
809 | return inl == 0; | |
810 | } | |
811 | ||
812 | if (ctx->flags & EVP_CIPH_NO_PADDING) | |
813 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); | |
814 | ||
815 | OPENSSL_assert(b <= sizeof(ctx->final)); | |
816 | ||
817 | if (ctx->final_used) { | |
818 | /* see comment about PTRDIFF_T comparison above */ | |
819 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
820 | || ossl_is_partially_overlapping(out, in, b)) { | |
821 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); | |
822 | return 0; | |
823 | } | |
824 | /* | |
825 | * final_used is only ever set if buf_len is 0. Therefore the maximum | |
826 | * length output we will ever see from evp_EncryptDecryptUpdate is | |
827 | * the maximum multiple of the block length that is <= inl, or just: | |
828 | * inl & ~(b - 1) | |
829 | * Since final_used has been set then the final output length is: | |
830 | * (inl & ~(b - 1)) + b | |
831 | * This must never exceed INT_MAX | |
832 | */ | |
833 | if ((inl & ~(b - 1)) > INT_MAX - b) { | |
834 | ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); | |
835 | return 0; | |
836 | } | |
837 | memcpy(out, ctx->final, b); | |
838 | out += b; | |
839 | fix_len = 1; | |
840 | } else | |
841 | fix_len = 0; | |
842 | ||
843 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) | |
844 | return 0; | |
845 | ||
846 | /* | |
847 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
848 | * copy of this last block | |
849 | */ | |
850 | if (b > 1 && !ctx->buf_len) { | |
851 | *outl -= b; | |
852 | ctx->final_used = 1; | |
853 | memcpy(ctx->final, &out[*outl], b); | |
854 | } else | |
855 | ctx->final_used = 0; | |
856 | ||
857 | if (fix_len) | |
858 | *outl += b; | |
859 | ||
860 | return 1; | |
861 | } | |
862 | ||
863 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
864 | { | |
865 | int ret; | |
866 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
867 | return ret; | |
868 | } | |
869 | ||
870 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
871 | { | |
872 | int i, n; | |
873 | unsigned int b; | |
874 | size_t soutl; | |
875 | int ret; | |
876 | int blocksize; | |
877 | ||
878 | if (outl != NULL) { | |
879 | *outl = 0; | |
880 | } else { | |
881 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); | |
882 | return 0; | |
883 | } | |
884 | ||
885 | /* Prevent accidental use of encryption context when decrypting */ | |
886 | if (ctx->encrypt) { | |
887 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); | |
888 | return 0; | |
889 | } | |
890 | ||
891 | if (ctx->cipher == NULL) { | |
892 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); | |
893 | return 0; | |
894 | } | |
895 | ||
896 | if (ctx->cipher->prov == NULL) | |
897 | goto legacy; | |
898 | ||
899 | blocksize = EVP_CIPHER_CTX_block_size(ctx); | |
900 | ||
901 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
902 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); | |
903 | return 0; | |
904 | } | |
905 | ||
906 | ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl, | |
907 | blocksize == 1 ? 0 : blocksize); | |
908 | ||
909 | if (ret) { | |
910 | if (soutl > INT_MAX) { | |
911 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); | |
912 | return 0; | |
913 | } | |
914 | *outl = soutl; | |
915 | } | |
916 | ||
917 | return ret; | |
918 | ||
919 | /* Code below to be removed when legacy support is dropped. */ | |
920 | legacy: | |
921 | ||
922 | *outl = 0; | |
923 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
924 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
925 | if (i < 0) | |
926 | return 0; | |
927 | else | |
928 | *outl = i; | |
929 | return 1; | |
930 | } | |
931 | ||
932 | b = ctx->cipher->block_size; | |
933 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
934 | if (ctx->buf_len) { | |
935 | ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
936 | return 0; | |
937 | } | |
938 | *outl = 0; | |
939 | return 1; | |
940 | } | |
941 | if (b > 1) { | |
942 | if (ctx->buf_len || !ctx->final_used) { | |
943 | ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
944 | return 0; | |
945 | } | |
946 | OPENSSL_assert(b <= sizeof(ctx->final)); | |
947 | ||
948 | /* | |
949 | * The following assumes that the ciphertext has been authenticated. | |
950 | * Otherwise it provides a padding oracle. | |
951 | */ | |
952 | n = ctx->final[b - 1]; | |
953 | if (n == 0 || n > (int)b) { | |
954 | ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); | |
955 | return 0; | |
956 | } | |
957 | for (i = 0; i < n; i++) { | |
958 | if (ctx->final[--b] != n) { | |
959 | ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); | |
960 | return 0; | |
961 | } | |
962 | } | |
963 | n = ctx->cipher->block_size - n; | |
964 | for (i = 0; i < n; i++) | |
965 | out[i] = ctx->final[i]; | |
966 | *outl = n; | |
967 | } else | |
968 | *outl = 0; | |
969 | return 1; | |
970 | } | |
971 | ||
972 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) | |
973 | { | |
974 | if (c->cipher->prov != NULL) { | |
975 | int ok; | |
976 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
977 | size_t len = keylen; | |
978 | ||
979 | if (EVP_CIPHER_CTX_key_length(c) == keylen) | |
980 | return 1; | |
981 | ||
982 | /* Check the cipher actually understands this parameter */ | |
983 | if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher), | |
984 | OSSL_CIPHER_PARAM_KEYLEN) == NULL) | |
985 | return 0; | |
986 | ||
987 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); | |
988 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params); | |
989 | ||
990 | return ok > 0 ? 1 : 0; | |
991 | } | |
992 | ||
993 | /* Code below to be removed when legacy support is dropped. */ | |
994 | ||
995 | /* | |
996 | * Note there have never been any built-in ciphers that define this flag | |
997 | * since it was first introduced. | |
998 | */ | |
999 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) | |
1000 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
1001 | if (EVP_CIPHER_CTX_key_length(c) == keylen) | |
1002 | return 1; | |
1003 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
1004 | c->key_len = keylen; | |
1005 | return 1; | |
1006 | } | |
1007 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH); | |
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) | |
1012 | { | |
1013 | int ok; | |
1014 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
1015 | unsigned int pd = pad; | |
1016 | ||
1017 | if (pad) | |
1018 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
1019 | else | |
1020 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
1021 | ||
1022 | if (ctx->cipher != NULL && ctx->cipher->prov == NULL) | |
1023 | return 1; | |
1024 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); | |
1025 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); | |
1026 | ||
1027 | return ok != 0; | |
1028 | } | |
1029 | ||
1030 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) | |
1031 | { | |
1032 | int ret = EVP_CTRL_RET_UNSUPPORTED; | |
1033 | int set_params = 1; | |
1034 | size_t sz = arg; | |
1035 | unsigned int i; | |
1036 | OSSL_PARAM params[4] = { | |
1037 | OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END | |
1038 | }; | |
1039 | ||
1040 | if (ctx == NULL || ctx->cipher == NULL) { | |
1041 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); | |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | if (ctx->cipher->prov == NULL) | |
1046 | goto legacy; | |
1047 | ||
1048 | switch (type) { | |
1049 | case EVP_CTRL_SET_KEY_LENGTH: | |
1050 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); | |
1051 | break; | |
1052 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
1053 | set_params = 0; | |
1054 | params[0] = | |
1055 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1056 | ptr, sz); | |
1057 | break; | |
1058 | ||
1059 | case EVP_CTRL_INIT: | |
1060 | /* | |
1061 | * EVP_CTRL_INIT is purely legacy, no provider counterpart. | |
1062 | * As a matter of fact, this should be dead code, but some caller | |
1063 | * might still do a direct control call with this command, so... | |
1064 | * Legacy methods return 1 except for exceptional circumstances, so | |
1065 | * we do the same here to not be disruptive. | |
1066 | */ | |
1067 | return 1; | |
1068 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ | |
1069 | default: | |
1070 | goto end; | |
1071 | case EVP_CTRL_AEAD_SET_IVLEN: | |
1072 | if (arg < 0) | |
1073 | return 0; | |
1074 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); | |
1075 | break; | |
1076 | case EVP_CTRL_AEAD_SET_IV_FIXED: | |
1077 | params[0] = OSSL_PARAM_construct_octet_string( | |
1078 | OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz); | |
1079 | break; | |
1080 | case EVP_CTRL_GCM_IV_GEN: | |
1081 | set_params = 0; | |
1082 | if (arg < 0) | |
1083 | sz = 0; /* special case that uses the iv length */ | |
1084 | params[0] = OSSL_PARAM_construct_octet_string( | |
1085 | OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz); | |
1086 | break; | |
1087 | case EVP_CTRL_GCM_SET_IV_INV: | |
1088 | if (arg < 0) | |
1089 | return 0; | |
1090 | params[0] = OSSL_PARAM_construct_octet_string( | |
1091 | OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz); | |
1092 | break; | |
1093 | case EVP_CTRL_GET_RC5_ROUNDS: | |
1094 | set_params = 0; /* Fall thru */ | |
1095 | case EVP_CTRL_SET_RC5_ROUNDS: | |
1096 | if (arg < 0) | |
1097 | return 0; | |
1098 | i = (unsigned int)arg; | |
1099 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i); | |
1100 | break; | |
1101 | case EVP_CTRL_SET_SPEED: | |
1102 | if (arg < 0) | |
1103 | return 0; | |
1104 | i = (unsigned int)arg; | |
1105 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i); | |
1106 | break; | |
1107 | case EVP_CTRL_AEAD_GET_TAG: | |
1108 | set_params = 0; /* Fall thru */ | |
1109 | case EVP_CTRL_AEAD_SET_TAG: | |
1110 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, | |
1111 | ptr, sz); | |
1112 | break; | |
1113 | case EVP_CTRL_AEAD_TLS1_AAD: | |
1114 | /* This one does a set and a get - since it returns a size */ | |
1115 | params[0] = | |
1116 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1117 | ptr, sz); | |
1118 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); | |
1119 | if (ret <= 0) | |
1120 | goto end; | |
1121 | params[0] = | |
1122 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1123 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); | |
1124 | if (ret <= 0) | |
1125 | goto end; | |
1126 | return sz; | |
1127 | #ifndef OPENSSL_NO_RC2 | |
1128 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
1129 | set_params = 0; /* Fall thru */ | |
1130 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
1131 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz); | |
1132 | break; | |
1133 | #endif /* OPENSSL_NO_RC2 */ | |
1134 | #if !defined(OPENSSL_NO_MULTIBLOCK) | |
1135 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE: | |
1136 | params[0] = OSSL_PARAM_construct_size_t( | |
1137 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz); | |
1138 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); | |
1139 | if (ret <= 0) | |
1140 | return 0; | |
1141 | ||
1142 | params[0] = OSSL_PARAM_construct_size_t( | |
1143 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz); | |
1144 | params[1] = OSSL_PARAM_construct_end(); | |
1145 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); | |
1146 | if (ret <= 0) | |
1147 | return 0; | |
1148 | return sz; | |
1149 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: { | |
1150 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1151 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1152 | ||
1153 | if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) | |
1154 | return 0; | |
1155 | ||
1156 | params[0] = OSSL_PARAM_construct_octet_string( | |
1157 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len); | |
1158 | params[1] = OSSL_PARAM_construct_uint( | |
1159 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1160 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); | |
1161 | if (ret <= 0) | |
1162 | return ret; | |
1163 | /* Retrieve the return values changed by the set */ | |
1164 | params[0] = OSSL_PARAM_construct_size_t( | |
1165 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz); | |
1166 | params[1] = OSSL_PARAM_construct_uint( | |
1167 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1168 | params[2] = OSSL_PARAM_construct_end(); | |
1169 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); | |
1170 | if (ret <= 0) | |
1171 | return 0; | |
1172 | return sz; | |
1173 | } | |
1174 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: { | |
1175 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1176 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1177 | ||
1178 | params[0] = OSSL_PARAM_construct_octet_string( | |
1179 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len); | |
1180 | ||
1181 | params[1] = OSSL_PARAM_construct_octet_string( | |
1182 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp, | |
1183 | p->len); | |
1184 | params[2] = OSSL_PARAM_construct_uint( | |
1185 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1186 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); | |
1187 | if (ret <= 0) | |
1188 | return ret; | |
1189 | params[0] = OSSL_PARAM_construct_size_t( | |
1190 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz); | |
1191 | params[1] = OSSL_PARAM_construct_end(); | |
1192 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); | |
1193 | if (ret <= 0) | |
1194 | return 0; | |
1195 | return sz; | |
1196 | } | |
1197 | #endif /* OPENSSL_NO_MULTIBLOCK */ | |
1198 | case EVP_CTRL_AEAD_SET_MAC_KEY: | |
1199 | if (arg < 0) | |
1200 | return -1; | |
1201 | params[0] = OSSL_PARAM_construct_octet_string( | |
1202 | OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz); | |
1203 | break; | |
1204 | } | |
1205 | ||
1206 | if (set_params) | |
1207 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); | |
1208 | else | |
1209 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); | |
1210 | goto end; | |
1211 | ||
1212 | /* Code below to be removed when legacy support is dropped. */ | |
1213 | legacy: | |
1214 | if (ctx->cipher->ctrl == NULL) { | |
1215 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED); | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
1220 | ||
1221 | end: | |
1222 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { | |
1223 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
1224 | return 0; | |
1225 | } | |
1226 | return ret; | |
1227 | } | |
1228 | ||
1229 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) | |
1230 | { | |
1231 | if (cipher != NULL && cipher->get_params != NULL) | |
1232 | return cipher->get_params(params); | |
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1237 | { | |
1238 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) | |
1239 | return ctx->cipher->set_ctx_params(ctx->algctx, params); | |
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1244 | { | |
1245 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) | |
1246 | return ctx->cipher->get_ctx_params(ctx->algctx, params); | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1251 | { | |
1252 | if (cipher != NULL && cipher->gettable_params != NULL) | |
1253 | return cipher->gettable_params( | |
1254 | ossl_provider_ctx(EVP_CIPHER_provider(cipher))); | |
1255 | return NULL; | |
1256 | } | |
1257 | ||
1258 | const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher) | |
1259 | { | |
1260 | void *provctx; | |
1261 | ||
1262 | if (cipher != NULL && cipher->settable_ctx_params != NULL) { | |
1263 | provctx = ossl_provider_ctx(EVP_CIPHER_provider(cipher)); | |
1264 | return cipher->settable_ctx_params(NULL, provctx); | |
1265 | } | |
1266 | return NULL; | |
1267 | } | |
1268 | ||
1269 | const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher) | |
1270 | { | |
1271 | void *provctx; | |
1272 | ||
1273 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) { | |
1274 | provctx = ossl_provider_ctx(EVP_CIPHER_provider(cipher)); | |
1275 | return cipher->gettable_ctx_params(NULL, provctx); | |
1276 | } | |
1277 | return NULL; | |
1278 | } | |
1279 | ||
1280 | const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx) | |
1281 | { | |
1282 | void *alg; | |
1283 | ||
1284 | if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) { | |
1285 | alg = ossl_provider_ctx(EVP_CIPHER_provider(cctx->cipher)); | |
1286 | return cctx->cipher->settable_ctx_params(cctx->algctx, alg); | |
1287 | } | |
1288 | return NULL; | |
1289 | } | |
1290 | ||
1291 | const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx) | |
1292 | { | |
1293 | void *provctx; | |
1294 | ||
1295 | if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) { | |
1296 | provctx = ossl_provider_ctx(EVP_CIPHER_provider(cctx->cipher)); | |
1297 | return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx); | |
1298 | } | |
1299 | return NULL; | |
1300 | } | |
1301 | ||
1302 | #ifndef FIPS_MODULE | |
1303 | static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx) | |
1304 | { | |
1305 | const EVP_CIPHER *cipher = ctx->cipher; | |
1306 | const OSSL_PROVIDER *prov; | |
1307 | ||
1308 | if (cipher == NULL) | |
1309 | return NULL; | |
1310 | ||
1311 | prov = EVP_CIPHER_provider(cipher); | |
1312 | return ossl_provider_libctx(prov); | |
1313 | } | |
1314 | #endif | |
1315 | ||
1316 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) | |
1317 | { | |
1318 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1319 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
1320 | ||
1321 | #ifdef FIPS_MODULE | |
1322 | return 0; | |
1323 | #else | |
1324 | { | |
1325 | int kl; | |
1326 | OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx); | |
1327 | ||
1328 | kl = EVP_CIPHER_CTX_key_length(ctx); | |
1329 | if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl) <= 0) | |
1330 | return 0; | |
1331 | return 1; | |
1332 | } | |
1333 | #endif /* FIPS_MODULE */ | |
1334 | } | |
1335 | ||
1336 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) | |
1337 | { | |
1338 | if ((in == NULL) || (in->cipher == NULL)) { | |
1339 | ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED); | |
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | if (in->cipher->prov == NULL) | |
1344 | goto legacy; | |
1345 | ||
1346 | if (in->cipher->dupctx == NULL) { | |
1347 | ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | EVP_CIPHER_CTX_reset(out); | |
1352 | ||
1353 | *out = *in; | |
1354 | out->algctx = NULL; | |
1355 | ||
1356 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { | |
1357 | out->fetched_cipher = NULL; | |
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | out->algctx = in->cipher->dupctx(in->algctx); | |
1362 | if (out->algctx == NULL) { | |
1363 | ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | return 1; | |
1368 | ||
1369 | /* Code below to be removed when legacy support is dropped. */ | |
1370 | legacy: | |
1371 | ||
1372 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) | |
1373 | /* Make sure it's safe to copy a cipher context using an ENGINE */ | |
1374 | if (in->engine && !ENGINE_init(in->engine)) { | |
1375 | ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB); | |
1376 | return 0; | |
1377 | } | |
1378 | #endif | |
1379 | ||
1380 | EVP_CIPHER_CTX_reset(out); | |
1381 | memcpy(out, in, sizeof(*out)); | |
1382 | ||
1383 | if (in->cipher_data && in->cipher->ctx_size) { | |
1384 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
1385 | if (out->cipher_data == NULL) { | |
1386 | out->cipher = NULL; | |
1387 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); | |
1388 | return 0; | |
1389 | } | |
1390 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1391 | } | |
1392 | ||
1393 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
1394 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { | |
1395 | out->cipher = NULL; | |
1396 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
1397 | return 0; | |
1398 | } | |
1399 | return 1; | |
1400 | } | |
1401 | ||
1402 | EVP_CIPHER *evp_cipher_new(void) | |
1403 | { | |
1404 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1405 | ||
1406 | if (cipher != NULL) { | |
1407 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1408 | if (cipher->lock == NULL) { | |
1409 | OPENSSL_free(cipher); | |
1410 | return NULL; | |
1411 | } | |
1412 | cipher->refcnt = 1; | |
1413 | } | |
1414 | return cipher; | |
1415 | } | |
1416 | ||
1417 | /* | |
1418 | * FIPS module note: since internal fetches will be entirely | |
1419 | * provider based, we know that none of its code depends on legacy | |
1420 | * NIDs or any functionality that use them. | |
1421 | */ | |
1422 | #ifndef FIPS_MODULE | |
1423 | /* After removal of legacy support get rid of the need for legacy NIDs */ | |
1424 | static void set_legacy_nid(const char *name, void *vlegacy_nid) | |
1425 | { | |
1426 | int nid; | |
1427 | int *legacy_nid = vlegacy_nid; | |
1428 | /* | |
1429 | * We use lowest level function to get the associated method, because | |
1430 | * higher level functions such as EVP_get_cipherbyname() have changed | |
1431 | * to look at providers too. | |
1432 | */ | |
1433 | const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH); | |
1434 | ||
1435 | if (*legacy_nid == -1) /* We found a clash already */ | |
1436 | return; | |
1437 | if (legacy_method == NULL) | |
1438 | return; | |
1439 | nid = EVP_CIPHER_nid(legacy_method); | |
1440 | if (*legacy_nid != NID_undef && *legacy_nid != nid) { | |
1441 | *legacy_nid = -1; | |
1442 | return; | |
1443 | } | |
1444 | *legacy_nid = nid; | |
1445 | } | |
1446 | #endif | |
1447 | ||
1448 | static void *evp_cipher_from_algorithm(const int name_id, | |
1449 | const OSSL_ALGORITHM *algodef, | |
1450 | OSSL_PROVIDER *prov) | |
1451 | { | |
1452 | const OSSL_DISPATCH *fns = algodef->implementation; | |
1453 | EVP_CIPHER *cipher = NULL; | |
1454 | int fnciphcnt = 0, fnctxcnt = 0; | |
1455 | ||
1456 | if ((cipher = evp_cipher_new()) == NULL) { | |
1457 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); | |
1458 | return NULL; | |
1459 | } | |
1460 | ||
1461 | #ifndef FIPS_MODULE | |
1462 | cipher->nid = NID_undef; | |
1463 | if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid) | |
1464 | || cipher->nid == -1) { | |
1465 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); | |
1466 | EVP_CIPHER_free(cipher); | |
1467 | return NULL; | |
1468 | } | |
1469 | #endif | |
1470 | ||
1471 | cipher->name_id = name_id; | |
1472 | if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) { | |
1473 | EVP_CIPHER_free(cipher); | |
1474 | return NULL; | |
1475 | } | |
1476 | cipher->description = algodef->algorithm_description; | |
1477 | ||
1478 | for (; fns->function_id != 0; fns++) { | |
1479 | switch (fns->function_id) { | |
1480 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1481 | if (cipher->newctx != NULL) | |
1482 | break; | |
1483 | cipher->newctx = OSSL_FUNC_cipher_newctx(fns); | |
1484 | fnctxcnt++; | |
1485 | break; | |
1486 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1487 | if (cipher->einit != NULL) | |
1488 | break; | |
1489 | cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns); | |
1490 | fnciphcnt++; | |
1491 | break; | |
1492 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1493 | if (cipher->dinit != NULL) | |
1494 | break; | |
1495 | cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns); | |
1496 | fnciphcnt++; | |
1497 | break; | |
1498 | case OSSL_FUNC_CIPHER_UPDATE: | |
1499 | if (cipher->cupdate != NULL) | |
1500 | break; | |
1501 | cipher->cupdate = OSSL_FUNC_cipher_update(fns); | |
1502 | fnciphcnt++; | |
1503 | break; | |
1504 | case OSSL_FUNC_CIPHER_FINAL: | |
1505 | if (cipher->cfinal != NULL) | |
1506 | break; | |
1507 | cipher->cfinal = OSSL_FUNC_cipher_final(fns); | |
1508 | fnciphcnt++; | |
1509 | break; | |
1510 | case OSSL_FUNC_CIPHER_CIPHER: | |
1511 | if (cipher->ccipher != NULL) | |
1512 | break; | |
1513 | cipher->ccipher = OSSL_FUNC_cipher_cipher(fns); | |
1514 | break; | |
1515 | case OSSL_FUNC_CIPHER_FREECTX: | |
1516 | if (cipher->freectx != NULL) | |
1517 | break; | |
1518 | cipher->freectx = OSSL_FUNC_cipher_freectx(fns); | |
1519 | fnctxcnt++; | |
1520 | break; | |
1521 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1522 | if (cipher->dupctx != NULL) | |
1523 | break; | |
1524 | cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns); | |
1525 | break; | |
1526 | case OSSL_FUNC_CIPHER_GET_PARAMS: | |
1527 | if (cipher->get_params != NULL) | |
1528 | break; | |
1529 | cipher->get_params = OSSL_FUNC_cipher_get_params(fns); | |
1530 | break; | |
1531 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: | |
1532 | if (cipher->get_ctx_params != NULL) | |
1533 | break; | |
1534 | cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns); | |
1535 | break; | |
1536 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: | |
1537 | if (cipher->set_ctx_params != NULL) | |
1538 | break; | |
1539 | cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns); | |
1540 | break; | |
1541 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: | |
1542 | if (cipher->gettable_params != NULL) | |
1543 | break; | |
1544 | cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns); | |
1545 | break; | |
1546 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1547 | if (cipher->gettable_ctx_params != NULL) | |
1548 | break; | |
1549 | cipher->gettable_ctx_params = | |
1550 | OSSL_FUNC_cipher_gettable_ctx_params(fns); | |
1551 | break; | |
1552 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1553 | if (cipher->settable_ctx_params != NULL) | |
1554 | break; | |
1555 | cipher->settable_ctx_params = | |
1556 | OSSL_FUNC_cipher_settable_ctx_params(fns); | |
1557 | break; | |
1558 | } | |
1559 | } | |
1560 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) | |
1561 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
1562 | || fnctxcnt != 2) { | |
1563 | /* | |
1564 | * In order to be a consistent set of functions we must have at least | |
1565 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
1566 | * functions, or a single "cipher" function. In all cases we need both | |
1567 | * the "newctx" and "freectx" functions. | |
1568 | */ | |
1569 | EVP_CIPHER_free(cipher); | |
1570 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); | |
1571 | return NULL; | |
1572 | } | |
1573 | cipher->prov = prov; | |
1574 | if (prov != NULL) | |
1575 | ossl_provider_up_ref(prov); | |
1576 | ||
1577 | if (!evp_cipher_cache_constants(cipher)) { | |
1578 | EVP_CIPHER_free(cipher); | |
1579 | ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED); | |
1580 | cipher = NULL; | |
1581 | } | |
1582 | ||
1583 | return cipher; | |
1584 | } | |
1585 | ||
1586 | static int evp_cipher_up_ref(void *cipher) | |
1587 | { | |
1588 | return EVP_CIPHER_up_ref(cipher); | |
1589 | } | |
1590 | ||
1591 | static void evp_cipher_free(void *cipher) | |
1592 | { | |
1593 | EVP_CIPHER_free(cipher); | |
1594 | } | |
1595 | ||
1596 | EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, | |
1597 | const char *properties) | |
1598 | { | |
1599 | EVP_CIPHER *cipher = | |
1600 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
1601 | evp_cipher_from_algorithm, evp_cipher_up_ref, | |
1602 | evp_cipher_free); | |
1603 | ||
1604 | return cipher; | |
1605 | } | |
1606 | ||
1607 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) | |
1608 | { | |
1609 | int ref = 0; | |
1610 | ||
1611 | if (cipher->origin == EVP_ORIG_DYNAMIC) | |
1612 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
1613 | return 1; | |
1614 | } | |
1615 | ||
1616 | void evp_cipher_free_int(EVP_CIPHER *cipher) | |
1617 | { | |
1618 | OPENSSL_free(cipher->type_name); | |
1619 | ossl_provider_free(cipher->prov); | |
1620 | CRYPTO_THREAD_lock_free(cipher->lock); | |
1621 | OPENSSL_free(cipher); | |
1622 | } | |
1623 | ||
1624 | void EVP_CIPHER_free(EVP_CIPHER *cipher) | |
1625 | { | |
1626 | int i; | |
1627 | ||
1628 | if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC) | |
1629 | return; | |
1630 | ||
1631 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1632 | if (i > 0) | |
1633 | return; | |
1634 | evp_cipher_free_int(cipher); | |
1635 | } | |
1636 | ||
1637 | void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx, | |
1638 | void (*fn)(EVP_CIPHER *mac, void *arg), | |
1639 | void *arg) | |
1640 | { | |
1641 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1642 | (void (*)(void *, void *))fn, arg, | |
1643 | evp_cipher_from_algorithm, evp_cipher_free); | |
1644 | } |