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62867571 | 1 | /* |
a672a02a | 2 | * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
c3a73daf | 11 | #include <assert.h> |
b39fc560 | 12 | #include "internal/cryptlib.h" |
ec577822 | 13 | #include <openssl/evp.h> |
7f060601 | 14 | #include <openssl/err.h> |
3a87a9b9 | 15 | #include <openssl/rand.h> |
6decf943 | 16 | #include <openssl/rand_drbg.h> |
3c27208f | 17 | #include <openssl/engine.h> |
df05f2ce MC |
18 | #include <openssl/params.h> |
19 | #include <openssl/core_names.h> | |
135727ab | 20 | #include "internal/evp_int.h" |
df05f2ce | 21 | #include "internal/provider.h" |
57ae2e24 | 22 | #include "evp_locl.h" |
d02b48c6 | 23 | |
df05f2ce | 24 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) |
0f113f3e | 25 | { |
df05f2ce | 26 | if (ctx == NULL) |
8baf9968 | 27 | return 1; |
df05f2ce MC |
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) | |
550f974a | 38 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
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)) | |
8baf9968 RL |
48 | return 0; |
49 | /* Cleanse cipher context data */ | |
df05f2ce MC |
50 | if (ctx->cipher_data && ctx->cipher->ctx_size) |
51 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
8baf9968 | 52 | } |
df05f2ce | 53 | OPENSSL_free(ctx->cipher_data); |
319e518a | 54 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
df05f2ce | 55 | ENGINE_finish(ctx->engine); |
8baf9968 | 56 | #endif |
df05f2ce | 57 | memset(ctx, 0, sizeof(*ctx)); |
8baf9968 | 58 | return 1; |
0f113f3e | 59 | } |
d02b48c6 | 60 | |
b40228a6 | 61 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) |
0f113f3e | 62 | { |
8baf9968 RL |
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); | |
0f113f3e | 70 | } |
581f1c84 | 71 | |
360370d9 | 72 | int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
73 | const unsigned char *key, const unsigned char *iv, int enc) |
74 | { | |
ffd23209 KR |
75 | if (cipher != NULL) |
76 | EVP_CIPHER_CTX_reset(ctx); | |
0f113f3e MC |
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 | { | |
319e518a | 84 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
df05f2ce | 85 | ENGINE *tmpimpl = NULL; |
319e518a | 86 | #endif |
df05f2ce MC |
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) { | |
0f113f3e | 95 | enc = ctx->encrypt; |
df05f2ce | 96 | } else { |
0f113f3e MC |
97 | if (enc) |
98 | enc = 1; | |
99 | ctx->encrypt = enc; | |
100 | } | |
df05f2ce MC |
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 | ||
319e518a | 109 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e MC |
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 | |
0d4fb843 | 114 | * reinitialisation, when it may all be unnecessary. |
0f113f3e | 115 | */ |
f6b94279 | 116 | if (ctx->engine && ctx->cipher |
a7f9e0a4 | 117 | && (cipher == NULL || cipher->nid == ctx->cipher->nid)) |
0f113f3e | 118 | goto skip_to_init; |
df05f2ce MC |
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 | } | |
0b13e9f0 | 124 | #endif |
df05f2ce MC |
125 | |
126 | /* | |
127 | * If there are engines involved then we should use legacy handling for now. | |
128 | */ | |
129 | if (ctx->engine != NULL | |
319e518a MC |
130 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
131 | || tmpimpl != NULL | |
132 | #endif | |
133 | || impl != NULL) { | |
df05f2ce MC |
134 | if (ctx->cipher == ctx->fetched_cipher) |
135 | ctx->cipher = NULL; | |
550f974a | 136 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
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) { | |
aab26e6f | 145 | case NID_aes_256_ecb: |
f4a129bb MC |
146 | case NID_aes_192_ecb: |
147 | case NID_aes_128_ecb: | |
718b133a MC |
148 | case NID_aes_256_cbc: |
149 | case NID_aes_192_cbc: | |
150 | case NID_aes_128_cbc: | |
ed98df51 MC |
151 | case NID_aes_256_ofb128: |
152 | case NID_aes_192_ofb128: | |
153 | case NID_aes_128_ofb128: | |
75dd6d64 MC |
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: | |
819a7ae9 MC |
163 | case NID_aes_256_ctr: |
164 | case NID_aes_192_ctr: | |
165 | case NID_aes_128_ctr: | |
3a9f26f3 SL |
166 | case NID_aes_128_xts: |
167 | case NID_aes_256_xts: | |
a672a02a SL |
168 | case NID_aes_256_gcm: |
169 | case NID_aes_192_gcm: | |
170 | case NID_aes_128_gcm: | |
171 | case NID_aria_256_gcm: | |
172 | case NID_aria_192_gcm: | |
173 | case NID_aria_128_gcm: | |
3bfe9005 SL |
174 | case NID_aes_256_ccm: |
175 | case NID_aes_192_ccm: | |
176 | case NID_aes_128_ccm: | |
177 | case NID_aria_256_ccm: | |
178 | case NID_aria_192_ccm: | |
179 | case NID_aria_128_ccm: | |
e1178600 SL |
180 | case NID_aria_256_ecb: |
181 | case NID_aria_192_ecb: | |
182 | case NID_aria_128_ecb: | |
183 | case NID_aria_256_cbc: | |
184 | case NID_aria_192_cbc: | |
185 | case NID_aria_128_cbc: | |
186 | case NID_aria_256_ofb128: | |
187 | case NID_aria_192_ofb128: | |
188 | case NID_aria_128_ofb128: | |
189 | case NID_aria_256_cfb128: | |
190 | case NID_aria_192_cfb128: | |
191 | case NID_aria_128_cfb128: | |
192 | case NID_aria_256_cfb1: | |
193 | case NID_aria_192_cfb1: | |
194 | case NID_aria_128_cfb1: | |
195 | case NID_aria_256_cfb8: | |
196 | case NID_aria_192_cfb8: | |
197 | case NID_aria_128_cfb8: | |
198 | case NID_aria_256_ctr: | |
199 | case NID_aria_192_ctr: | |
200 | case NID_aria_128_ctr: | |
201 | case NID_camellia_256_ecb: | |
202 | case NID_camellia_192_ecb: | |
203 | case NID_camellia_128_ecb: | |
204 | case NID_camellia_256_cbc: | |
205 | case NID_camellia_192_cbc: | |
206 | case NID_camellia_128_cbc: | |
207 | case NID_camellia_256_ofb128: | |
208 | case NID_camellia_192_ofb128: | |
209 | case NID_camellia_128_ofb128: | |
210 | case NID_camellia_256_cfb128: | |
211 | case NID_camellia_192_cfb128: | |
212 | case NID_camellia_128_cfb128: | |
213 | case NID_camellia_256_cfb1: | |
214 | case NID_camellia_192_cfb1: | |
215 | case NID_camellia_128_cfb1: | |
216 | case NID_camellia_256_cfb8: | |
217 | case NID_camellia_192_cfb8: | |
218 | case NID_camellia_128_cfb8: | |
219 | case NID_camellia_256_ctr: | |
220 | case NID_camellia_192_ctr: | |
221 | case NID_camellia_128_ctr: | |
4a42e264 SL |
222 | case NID_des_ede3_cbc: |
223 | case NID_des_ede3_ecb: | |
224 | case NID_des_ede3_ofb64: | |
225 | case NID_des_ede3_cfb64: | |
226 | case NID_des_ede3_cfb8: | |
227 | case NID_des_ede3_cfb1: | |
228 | case NID_des_ede_cbc: | |
229 | case NID_des_ede_ecb: | |
230 | case NID_des_ede_ofb64: | |
231 | case NID_des_ede_cfb64: | |
232 | case NID_desx_cbc: | |
233 | case NID_id_smime_alg_CMS3DESwrap: | |
55c7dc79 SL |
234 | case NID_bf_cbc: |
235 | case NID_bf_ecb: | |
236 | case NID_bf_cfb64: | |
237 | case NID_bf_ofb64: | |
f22431f2 SL |
238 | case NID_idea_cbc: |
239 | case NID_idea_ecb: | |
240 | case NID_idea_cfb64: | |
241 | case NID_idea_ofb64: | |
18b00427 SL |
242 | case NID_cast5_cbc: |
243 | case NID_cast5_ecb: | |
244 | case NID_cast5_cfb64: | |
245 | case NID_cast5_ofb64: | |
70adc646 SL |
246 | case NID_seed_cbc: |
247 | case NID_seed_ecb: | |
248 | case NID_seed_cfb128: | |
249 | case NID_seed_ofb128: | |
105dde25 SL |
250 | case NID_sm4_cbc: |
251 | case NID_sm4_ecb: | |
252 | case NID_sm4_ctr: | |
253 | case NID_sm4_cfb128: | |
254 | case NID_sm4_ofb128: | |
aab26e6f | 255 | break; |
df05f2ce MC |
256 | default: |
257 | goto legacy; | |
258 | } | |
259 | } | |
260 | ||
261 | /* | |
262 | * Ensure a context left lying around from last time is cleared | |
263 | * (legacy code) | |
264 | */ | |
265 | if (cipher != NULL && ctx->cipher != NULL) { | |
266 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
267 | ctx->cipher_data = NULL; | |
268 | } | |
269 | ||
270 | ||
271 | /* TODO(3.0): Start of non-legacy code below */ | |
272 | ||
273 | /* Ensure a context left lying around from last time is cleared */ | |
274 | if (cipher != NULL && ctx->cipher != NULL) { | |
275 | unsigned long flags = ctx->flags; | |
276 | ||
277 | EVP_CIPHER_CTX_reset(ctx); | |
278 | /* Restore encrypt and flags */ | |
279 | ctx->encrypt = enc; | |
280 | ctx->flags = flags; | |
281 | } | |
282 | ||
7f612b1f | 283 | if (cipher == NULL) |
df05f2ce MC |
284 | cipher = ctx->cipher; |
285 | ||
286 | if (cipher->prov == NULL) { | |
319e518a MC |
287 | #ifdef FIPS_MODE |
288 | /* We only do explict fetches inside the FIPS module */ | |
289 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
290 | return 0; | |
291 | #else | |
292 | EVP_CIPHER *provciph = | |
293 | EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), ""); | |
294 | ||
df05f2ce MC |
295 | if (provciph == NULL) { |
296 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
297 | return 0; | |
298 | } | |
299 | cipher = provciph; | |
550f974a | 300 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 301 | ctx->fetched_cipher = provciph; |
319e518a | 302 | #endif |
df05f2ce MC |
303 | } |
304 | ||
305 | ctx->cipher = cipher; | |
306 | if (ctx->provctx == NULL) { | |
a39eb840 | 307 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
df05f2ce MC |
308 | if (ctx->provctx == NULL) { |
309 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
310 | return 0; | |
311 | } | |
312 | } | |
313 | ||
314 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 315 | /* |
df05f2ce MC |
316 | * If this ctx was already set up for no padding then we need to tell |
317 | * the new cipher about it. | |
318 | */ | |
319 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
320 | return 0; | |
321 | } | |
322 | ||
718b133a MC |
323 | switch (EVP_CIPHER_mode(ctx->cipher)) { |
324 | case EVP_CIPH_CFB_MODE: | |
325 | case EVP_CIPH_OFB_MODE: | |
326 | case EVP_CIPH_CBC_MODE: | |
327 | /* For these modes we remember the original IV for later use */ | |
328 | if (!ossl_assert(EVP_CIPHER_CTX_iv_length(ctx) <= (int)sizeof(ctx->oiv))) { | |
329 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
330 | return 0; | |
331 | } | |
332 | if (iv != NULL) | |
333 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
334 | } | |
335 | ||
df05f2ce MC |
336 | if (enc) { |
337 | if (ctx->cipher->einit == NULL) { | |
338 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
339 | return 0; | |
340 | } | |
341 | ||
344cfa34 MC |
342 | return ctx->cipher->einit(ctx->provctx, |
343 | key, | |
33b40a10 MC |
344 | key == NULL ? 0 |
345 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 346 | iv, |
33b40a10 MC |
347 | iv == NULL ? 0 |
348 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
349 | } |
350 | ||
351 | if (ctx->cipher->dinit == NULL) { | |
352 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
353 | return 0; | |
354 | } | |
355 | ||
344cfa34 MC |
356 | return ctx->cipher->dinit(ctx->provctx, |
357 | key, | |
33b40a10 MC |
358 | key == NULL ? 0 |
359 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 360 | iv, |
33b40a10 MC |
361 | iv == NULL ? 0 |
362 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
363 | |
364 | /* TODO(3.0): Remove legacy code below */ | |
365 | legacy: | |
366 | ||
367 | if (cipher != NULL) { | |
368 | /* | |
369 | * Ensure a context left lying around from last time is cleared (we | |
370 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
371 | * EVP_CIPHER could be used). |
372 | */ | |
373 | if (ctx->cipher) { | |
374 | unsigned long flags = ctx->flags; | |
c0ca39bd | 375 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
376 | /* Restore encrypt and flags */ |
377 | ctx->encrypt = enc; | |
378 | ctx->flags = flags; | |
379 | } | |
319e518a | 380 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
df05f2ce | 381 | if (impl != NULL) { |
0f113f3e MC |
382 | if (!ENGINE_init(impl)) { |
383 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
384 | return 0; | |
385 | } | |
df05f2ce MC |
386 | } else { |
387 | impl = tmpimpl; | |
388 | } | |
389 | if (impl != NULL) { | |
0f113f3e MC |
390 | /* There's an ENGINE for this job ... (apparently) */ |
391 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
392 | |
393 | if (c == NULL) { | |
0f113f3e MC |
394 | /* |
395 | * One positive side-effect of US's export control history, | |
396 | * is that we should at least be able to avoid using US | |
0d4fb843 | 397 | * misspellings of "initialisation"? |
0f113f3e MC |
398 | */ |
399 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
400 | return 0; | |
401 | } | |
402 | /* We'll use the ENGINE's private cipher definition */ | |
403 | cipher = c; | |
404 | /* | |
405 | * Store the ENGINE functional reference so we know 'cipher' came | |
406 | * from an ENGINE and we need to release it when done. | |
407 | */ | |
408 | ctx->engine = impl; | |
df05f2ce | 409 | } else { |
0f113f3e | 410 | ctx->engine = NULL; |
df05f2ce | 411 | } |
0b13e9f0 | 412 | #endif |
544a2aea | 413 | |
0f113f3e MC |
414 | ctx->cipher = cipher; |
415 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 416 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 417 | if (ctx->cipher_data == NULL) { |
273a0218 | 418 | ctx->cipher = NULL; |
0f113f3e MC |
419 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); |
420 | return 0; | |
421 | } | |
422 | } else { | |
423 | ctx->cipher_data = NULL; | |
424 | } | |
425 | ctx->key_len = cipher->key_len; | |
426 | /* Preserve wrap enable flag, zero everything else */ | |
427 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
428 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
429 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 430 | ctx->cipher = NULL; |
0f113f3e MC |
431 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
432 | return 0; | |
433 | } | |
434 | } | |
0f113f3e | 435 | } |
319e518a | 436 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e | 437 | skip_to_init: |
0b13e9f0 | 438 | #endif |
1702c500 P |
439 | if (ctx->cipher == NULL) |
440 | return 0; | |
441 | ||
0f113f3e MC |
442 | /* we assume block size is a power of 2 in *cryptUpdate */ |
443 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
444 | || ctx->cipher->block_size == 8 | |
445 | || ctx->cipher->block_size == 16); | |
446 | ||
447 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
448 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
449 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
450 | return 0; | |
451 | } | |
452 | ||
480d3323 | 453 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
454 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
455 | ||
456 | case EVP_CIPH_STREAM_CIPHER: | |
457 | case EVP_CIPH_ECB_MODE: | |
458 | break; | |
459 | ||
460 | case EVP_CIPH_CFB_MODE: | |
461 | case EVP_CIPH_OFB_MODE: | |
462 | ||
463 | ctx->num = 0; | |
464 | /* fall-through */ | |
465 | ||
466 | case EVP_CIPH_CBC_MODE: | |
467 | ||
468 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
469 | (int)sizeof(ctx->iv)); | |
470 | if (iv) | |
471 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
472 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
473 | break; | |
474 | ||
475 | case EVP_CIPH_CTR_MODE: | |
476 | ctx->num = 0; | |
477 | /* Don't reuse IV for CTR mode */ | |
478 | if (iv) | |
479 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
480 | break; | |
481 | ||
482 | default: | |
483 | return 0; | |
0f113f3e MC |
484 | } |
485 | } | |
486 | ||
487 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
488 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
489 | return 0; | |
490 | } | |
491 | ctx->buf_len = 0; | |
492 | ctx->final_used = 0; | |
493 | ctx->block_mask = ctx->cipher->block_size - 1; | |
494 | return 1; | |
495 | } | |
d02b48c6 | 496 | |
be06a934 | 497 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
498 | const unsigned char *in, int inl) |
499 | { | |
500 | if (ctx->encrypt) | |
501 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
502 | else | |
503 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
504 | } | |
d02b48c6 | 505 | |
581f1c84 | 506 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
507 | { |
508 | if (ctx->encrypt) | |
509 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
510 | else | |
511 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
512 | } | |
581f1c84 | 513 | |
6b691a5c | 514 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
515 | { |
516 | if (ctx->encrypt) | |
517 | return EVP_EncryptFinal(ctx, out, outl); | |
518 | else | |
519 | return EVP_DecryptFinal(ctx, out, outl); | |
520 | } | |
d02b48c6 | 521 | |
be06a934 | 522 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
523 | const unsigned char *key, const unsigned char *iv) |
524 | { | |
525 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
526 | } | |
18eda732 | 527 | |
0f113f3e MC |
528 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
529 | ENGINE *impl, const unsigned char *key, | |
530 | const unsigned char *iv) | |
531 | { | |
532 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
533 | } | |
d02b48c6 | 534 | |
be06a934 | 535 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
536 | const unsigned char *key, const unsigned char *iv) |
537 | { | |
538 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
539 | } | |
18eda732 | 540 | |
0f113f3e MC |
541 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
542 | ENGINE *impl, const unsigned char *key, | |
543 | const unsigned char *iv) | |
544 | { | |
545 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
546 | } | |
d02b48c6 | 547 | |
c3a73daf AP |
548 | /* |
549 | * According to the letter of standard difference between pointers | |
550 | * is specified to be valid only within same object. This makes | |
551 | * it formally challenging to determine if input and output buffers | |
552 | * are not partially overlapping with standard pointer arithmetic. | |
553 | */ | |
554 | #ifdef PTRDIFF_T | |
555 | # undef PTRDIFF_T | |
556 | #endif | |
557 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
558 | /* | |
559 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
560 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
561 | * difference between two pointers might be truncated to 32 bits. | |
562 | * In the context one can even wonder how comparison for | |
563 | * equality is implemented. To be on the safe side we adhere to | |
564 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
565 | */ |
566 | # define PTRDIFF_T uint64_t | |
567 | #else | |
568 | # define PTRDIFF_T size_t | |
569 | #endif | |
570 | ||
7141ba31 | 571 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
572 | { |
573 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
574 | /* | |
575 | * Check for partially overlapping buffers. [Binary logical | |
576 | * operations are used instead of boolean to minimize number | |
577 | * of conditional branches.] | |
578 | */ | |
83151b73 AP |
579 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
580 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 581 | |
83151b73 | 582 | return overlapped; |
c3a73daf AP |
583 | } |
584 | ||
a8bf2f8f RL |
585 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
586 | unsigned char *out, int *outl, | |
587 | const unsigned char *in, int inl) | |
0f113f3e | 588 | { |
64846096 LP |
589 | int i, j, bl, cmpl = inl; |
590 | ||
591 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
592 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 593 | |
7141ba31 MC |
594 | bl = ctx->cipher->block_size; |
595 | ||
0f113f3e | 596 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 597 | /* If block size > 1 then the cipher will have to do this check */ |
64846096 | 598 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { |
a8bf2f8f | 599 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 600 | return 0; |
83151b73 | 601 | } |
5fc77684 | 602 | |
0f113f3e MC |
603 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
604 | if (i < 0) | |
605 | return 0; | |
606 | else | |
607 | *outl = i; | |
608 | return 1; | |
609 | } | |
610 | ||
2c236894 MC |
611 | if (inl <= 0) { |
612 | *outl = 0; | |
613 | return inl == 0; | |
614 | } | |
64846096 | 615 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
a8bf2f8f | 616 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 617 | return 0; |
83151b73 | 618 | } |
0f113f3e MC |
619 | |
620 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
621 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
622 | *outl = inl; | |
623 | return 1; | |
624 | } else { | |
625 | *outl = 0; | |
626 | return 0; | |
627 | } | |
628 | } | |
629 | i = ctx->buf_len; | |
0f113f3e MC |
630 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
631 | if (i != 0) { | |
3f358213 | 632 | if (bl - i > inl) { |
0f113f3e MC |
633 | memcpy(&(ctx->buf[i]), in, inl); |
634 | ctx->buf_len += inl; | |
635 | *outl = 0; | |
636 | return 1; | |
637 | } else { | |
638 | j = bl - i; | |
639 | memcpy(&(ctx->buf[i]), in, j); | |
0f113f3e MC |
640 | inl -= j; |
641 | in += j; | |
5fc77684 AP |
642 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
643 | return 0; | |
0f113f3e MC |
644 | out += bl; |
645 | *outl = bl; | |
646 | } | |
647 | } else | |
648 | *outl = 0; | |
649 | i = inl & (bl - 1); | |
650 | inl -= i; | |
651 | if (inl > 0) { | |
652 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
653 | return 0; | |
654 | *outl += inl; | |
655 | } | |
656 | ||
657 | if (i != 0) | |
658 | memcpy(ctx->buf, &(in[inl]), i); | |
659 | ctx->buf_len = i; | |
660 | return 1; | |
661 | } | |
d02b48c6 | 662 | |
a8bf2f8f RL |
663 | |
664 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
665 | const unsigned char *in, int inl) | |
666 | { | |
df05f2ce MC |
667 | int ret; |
668 | size_t soutl; | |
3b94944c | 669 | int blocksize; |
df05f2ce | 670 | |
a8bf2f8f RL |
671 | /* Prevent accidental use of decryption context when encrypting */ |
672 | if (!ctx->encrypt) { | |
673 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
674 | return 0; | |
675 | } | |
676 | ||
d4d89a07 SS |
677 | if (ctx->cipher == NULL) { |
678 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
679 | return 0; | |
680 | } | |
681 | ||
682 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
683 | goto legacy; |
684 | ||
3b94944c MC |
685 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
686 | ||
687 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
688 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); |
689 | return 0; | |
690 | } | |
3b94944c MC |
691 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
692 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
693 | (size_t)inl); | |
df05f2ce | 694 | |
36e619d7 GV |
695 | if (ret) { |
696 | if (soutl > INT_MAX) { | |
697 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
698 | return 0; | |
699 | } | |
700 | *outl = soutl; | |
df05f2ce | 701 | } |
36e619d7 | 702 | |
df05f2ce MC |
703 | return ret; |
704 | ||
705 | /* TODO(3.0): Remove legacy code below */ | |
706 | legacy: | |
707 | ||
a8bf2f8f RL |
708 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
709 | } | |
710 | ||
be06a934 | 711 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
712 | { |
713 | int ret; | |
714 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
715 | return ret; | |
716 | } | |
581f1c84 DSH |
717 | |
718 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
719 | { |
720 | int n, ret; | |
721 | unsigned int i, b, bl; | |
df05f2ce | 722 | size_t soutl; |
3b94944c | 723 | int blocksize; |
0f113f3e | 724 | |
a8bf2f8f RL |
725 | /* Prevent accidental use of decryption context when encrypting */ |
726 | if (!ctx->encrypt) { | |
727 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
728 | return 0; | |
729 | } | |
730 | ||
4894dcad P |
731 | if (ctx->cipher == NULL) { |
732 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
733 | return 0; | |
734 | } | |
735 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
736 | goto legacy; |
737 | ||
3b94944c MC |
738 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
739 | ||
740 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
741 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
742 | return 0; | |
743 | } | |
744 | ||
3b94944c MC |
745 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
746 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce | 747 | |
36e619d7 GV |
748 | if (ret) { |
749 | if (soutl > INT_MAX) { | |
750 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
751 | return 0; | |
752 | } | |
753 | *outl = soutl; | |
df05f2ce | 754 | } |
df05f2ce MC |
755 | |
756 | return ret; | |
757 | ||
758 | /* TODO(3.0): Remove legacy code below */ | |
759 | legacy: | |
760 | ||
0f113f3e MC |
761 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
762 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
763 | if (ret < 0) | |
764 | return 0; | |
765 | else | |
766 | *outl = ret; | |
767 | return 1; | |
768 | } | |
769 | ||
770 | b = ctx->cipher->block_size; | |
cbe29648 | 771 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
772 | if (b == 1) { |
773 | *outl = 0; | |
774 | return 1; | |
775 | } | |
776 | bl = ctx->buf_len; | |
777 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
778 | if (bl) { | |
779 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
780 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
781 | return 0; | |
782 | } | |
783 | *outl = 0; | |
784 | return 1; | |
785 | } | |
786 | ||
787 | n = b - bl; | |
788 | for (i = bl; i < b; i++) | |
789 | ctx->buf[i] = n; | |
790 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
791 | ||
792 | if (ret) | |
793 | *outl = b; | |
794 | ||
795 | return ret; | |
796 | } | |
d02b48c6 | 797 | |
be06a934 | 798 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
799 | const unsigned char *in, int inl) |
800 | { | |
df05f2ce | 801 | int fix_len, cmpl = inl, ret; |
0f113f3e | 802 | unsigned int b; |
df05f2ce | 803 | size_t soutl; |
3b94944c | 804 | int blocksize; |
0f113f3e | 805 | |
a8bf2f8f RL |
806 | /* Prevent accidental use of encryption context when decrypting */ |
807 | if (ctx->encrypt) { | |
808 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
809 | return 0; | |
810 | } | |
811 | ||
d2c2e49e P |
812 | if (ctx->cipher == NULL) { |
813 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
814 | return 0; | |
815 | } | |
816 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
817 | goto legacy; |
818 | ||
3b94944c MC |
819 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
820 | ||
821 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
822 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); |
823 | return 0; | |
824 | } | |
3b94944c MC |
825 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
826 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
827 | (size_t)inl); | |
df05f2ce MC |
828 | |
829 | if (ret) { | |
830 | if (soutl > INT_MAX) { | |
831 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
832 | return 0; | |
833 | } | |
834 | *outl = soutl; | |
835 | } | |
836 | ||
837 | return ret; | |
838 | ||
839 | /* TODO(3.0): Remove legacy code below */ | |
840 | legacy: | |
841 | ||
7141ba31 MC |
842 | b = ctx->cipher->block_size; |
843 | ||
64846096 LP |
844 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
845 | cmpl = (cmpl + 7) / 8; | |
846 | ||
0f113f3e | 847 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
64846096 | 848 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { |
83151b73 | 849 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 850 | return 0; |
83151b73 | 851 | } |
5fc77684 | 852 | |
0f113f3e MC |
853 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
854 | if (fix_len < 0) { | |
855 | *outl = 0; | |
856 | return 0; | |
857 | } else | |
858 | *outl = fix_len; | |
859 | return 1; | |
860 | } | |
861 | ||
2c236894 MC |
862 | if (inl <= 0) { |
863 | *outl = 0; | |
864 | return inl == 0; | |
865 | } | |
866 | ||
0f113f3e | 867 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 868 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 869 | |
cbe29648 | 870 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
871 | |
872 | if (ctx->final_used) { | |
5fc77684 AP |
873 | /* see comment about PTRDIFF_T comparison above */ |
874 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
83151b73 AP |
875 | || is_partially_overlapping(out, in, b)) { |
876 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
5fc77684 | 877 | return 0; |
83151b73 | 878 | } |
0f113f3e MC |
879 | memcpy(out, ctx->final, b); |
880 | out += b; | |
881 | fix_len = 1; | |
882 | } else | |
883 | fix_len = 0; | |
884 | ||
a8bf2f8f | 885 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
886 | return 0; |
887 | ||
888 | /* | |
889 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
890 | * copy of this last block | |
891 | */ | |
892 | if (b > 1 && !ctx->buf_len) { | |
893 | *outl -= b; | |
894 | ctx->final_used = 1; | |
895 | memcpy(ctx->final, &out[*outl], b); | |
896 | } else | |
897 | ctx->final_used = 0; | |
898 | ||
899 | if (fix_len) | |
900 | *outl += b; | |
901 | ||
902 | return 1; | |
903 | } | |
d02b48c6 | 904 | |
6b691a5c | 905 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
906 | { |
907 | int ret; | |
908 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
909 | return ret; | |
910 | } | |
581f1c84 DSH |
911 | |
912 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
913 | { |
914 | int i, n; | |
915 | unsigned int b; | |
df05f2ce MC |
916 | size_t soutl; |
917 | int ret; | |
3b94944c | 918 | int blocksize; |
a8bf2f8f RL |
919 | |
920 | /* Prevent accidental use of encryption context when decrypting */ | |
921 | if (ctx->encrypt) { | |
922 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
923 | return 0; | |
924 | } | |
925 | ||
d4d89a07 SS |
926 | if (ctx->cipher == NULL) { |
927 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
928 | return 0; | |
929 | } | |
930 | ||
931 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
932 | goto legacy; |
933 | ||
3b94944c MC |
934 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
935 | ||
936 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
937 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
938 | return 0; | |
939 | } | |
940 | ||
3b94944c MC |
941 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
942 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
943 | |
944 | if (ret) { | |
945 | if (soutl > INT_MAX) { | |
946 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
947 | return 0; | |
948 | } | |
949 | *outl = soutl; | |
950 | } | |
951 | ||
952 | return ret; | |
953 | ||
954 | /* TODO(3.0): Remove legacy code below */ | |
955 | legacy: | |
956 | ||
0f113f3e | 957 | *outl = 0; |
0f113f3e MC |
958 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
959 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
960 | if (i < 0) | |
961 | return 0; | |
962 | else | |
963 | *outl = i; | |
964 | return 1; | |
965 | } | |
966 | ||
967 | b = ctx->cipher->block_size; | |
968 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
969 | if (ctx->buf_len) { | |
970 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
971 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
972 | return 0; | |
973 | } | |
974 | *outl = 0; | |
975 | return 1; | |
976 | } | |
977 | if (b > 1) { | |
978 | if (ctx->buf_len || !ctx->final_used) { | |
979 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
26a7d938 | 980 | return 0; |
0f113f3e | 981 | } |
cbe29648 | 982 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
983 | |
984 | /* | |
985 | * The following assumes that the ciphertext has been authenticated. | |
986 | * Otherwise it provides a padding oracle. | |
987 | */ | |
988 | n = ctx->final[b - 1]; | |
989 | if (n == 0 || n > (int)b) { | |
990 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 991 | return 0; |
0f113f3e MC |
992 | } |
993 | for (i = 0; i < n; i++) { | |
994 | if (ctx->final[--b] != n) { | |
995 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 996 | return 0; |
0f113f3e MC |
997 | } |
998 | } | |
999 | n = ctx->cipher->block_size - n; | |
1000 | for (i = 0; i < n; i++) | |
1001 | out[i] = ctx->final[i]; | |
1002 | *outl = n; | |
1003 | } else | |
1004 | *outl = 0; | |
208fb891 | 1005 | return 1; |
0f113f3e | 1006 | } |
d02b48c6 | 1007 | |
6343829a | 1008 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 1009 | { |
459b15d4 SL |
1010 | int ok; |
1011 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
1c3ace68 | 1012 | size_t len = keylen; |
459b15d4 | 1013 | |
1c3ace68 | 1014 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); |
459b15d4 | 1015 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params); |
13273237 | 1016 | |
e870791a | 1017 | if (ok != EVP_CTRL_RET_UNSUPPORTED) |
13273237 RL |
1018 | return ok; |
1019 | ||
1020 | /* TODO(3.0) legacy code follows */ | |
0f113f3e MC |
1021 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
1022 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 1023 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
1024 | return 1; |
1025 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
1026 | c->key_len = keylen; | |
1027 | return 1; | |
1028 | } | |
1029 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
1030 | return 0; | |
1031 | } | |
49528751 | 1032 | |
f2e5ca84 | 1033 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 1034 | { |
13273237 | 1035 | int ok; |
459b15d4 | 1036 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
1c3ace68 | 1037 | unsigned int pd = pad; |
13273237 | 1038 | |
0f113f3e MC |
1039 | if (pad) |
1040 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
1041 | else | |
1042 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 1043 | |
1c3ace68 | 1044 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
459b15d4 SL |
1045 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1046 | ||
13273237 | 1047 | return ok != 0; |
0f113f3e | 1048 | } |
f2e5ca84 | 1049 | |
49528751 DSH |
1050 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
1051 | { | |
e870791a | 1052 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 | 1053 | int set_params = 1; |
1c3ace68 | 1054 | size_t sz = arg; |
459b15d4 | 1055 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
d91f4568 | 1056 | |
459b15d4 | 1057 | if (ctx == NULL || ctx->cipher == NULL) { |
0f113f3e MC |
1058 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); |
1059 | return 0; | |
1060 | } | |
1061 | ||
13273237 RL |
1062 | if (ctx->cipher->prov == NULL) |
1063 | goto legacy; | |
1064 | ||
1065 | switch (type) { | |
1066 | case EVP_CTRL_SET_KEY_LENGTH: | |
1c3ace68 | 1067 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
13273237 RL |
1068 | break; |
1069 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
4a42e264 SL |
1070 | set_params = 0; |
1071 | params[0] = | |
1072 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1c3ace68 | 1073 | ptr, sz); |
4a42e264 SL |
1074 | break; |
1075 | ||
13273237 RL |
1076 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
1077 | case EVP_CTRL_INIT: /* TODO(3.0) Purely legacy, no provider counterpart */ | |
459b15d4 | 1078 | default: |
e870791a | 1079 | return EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 SL |
1080 | case EVP_CTRL_GET_IV: |
1081 | set_params = 0; | |
1082 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, | |
1c3ace68 | 1083 | ptr, sz); |
459b15d4 SL |
1084 | break; |
1085 | case EVP_CTRL_AEAD_SET_IVLEN: | |
1086 | if (arg < 0) | |
1087 | return 0; | |
1c3ace68 | 1088 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
13273237 | 1089 | break; |
459b15d4 SL |
1090 | case EVP_CTRL_GCM_SET_IV_FIXED: |
1091 | params[0] = | |
1092 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, | |
1c3ace68 | 1093 | ptr, sz); |
459b15d4 SL |
1094 | break; |
1095 | case EVP_CTRL_AEAD_GET_TAG: | |
1c3ace68 SL |
1096 | set_params = 0; /* Fall thru */ |
1097 | case EVP_CTRL_AEAD_SET_TAG: | |
459b15d4 | 1098 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
1c3ace68 | 1099 | ptr, sz); |
459b15d4 SL |
1100 | break; |
1101 | case EVP_CTRL_AEAD_TLS1_AAD: | |
1102 | /* This one does a set and a get - since it returns a padding size */ | |
1103 | params[0] = | |
1104 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1c3ace68 | 1105 | ptr, sz); |
459b15d4 SL |
1106 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1107 | if (ret <= 0) | |
1108 | return ret; | |
1109 | params[0] = | |
1110 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1111 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1112 | if (ret <= 0) | |
1113 | return 0; | |
1114 | return sz; | |
13273237 | 1115 | } |
459b15d4 SL |
1116 | |
1117 | if (set_params) | |
1118 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1119 | else | |
1120 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
13273237 RL |
1121 | return ret; |
1122 | ||
459b15d4 SL |
1123 | /* TODO(3.0): Remove legacy code below */ |
1124 | legacy: | |
1125 | if (ctx->cipher->ctrl == NULL) { | |
0f113f3e MC |
1126 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
e870791a | 1131 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
0f113f3e MC |
1132 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, |
1133 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
1134 | return 0; | |
1135 | } | |
1136 | return ret; | |
49528751 | 1137 | } |
216659eb | 1138 | |
ae3ff60e RL |
1139 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
1140 | { | |
1141 | if (cipher != NULL && cipher->get_params != NULL) | |
1142 | return cipher->get_params(params); | |
1143 | return 0; | |
1144 | } | |
1145 | ||
1146 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1147 | { | |
92d9d0ae RL |
1148 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) |
1149 | return ctx->cipher->set_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1150 | return 0; |
1151 | } | |
1152 | ||
1153 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1154 | { | |
92d9d0ae RL |
1155 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
1156 | return ctx->cipher->get_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1157 | return 0; |
1158 | } | |
1159 | ||
1160 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1161 | { | |
1162 | if (cipher != NULL && cipher->gettable_params != NULL) | |
1163 | return cipher->gettable_params(); | |
1164 | return NULL; | |
1165 | } | |
1166 | ||
1167 | const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(const EVP_CIPHER *cipher) | |
1168 | { | |
1169 | if (cipher != NULL && cipher->settable_ctx_params != NULL) | |
1170 | return cipher->settable_ctx_params(); | |
1171 | return NULL; | |
1172 | } | |
1173 | ||
1174 | const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(const EVP_CIPHER *cipher) | |
1175 | { | |
1176 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) | |
1177 | return cipher->gettable_ctx_params(); | |
1178 | return NULL; | |
1179 | } | |
1180 | ||
216659eb | 1181 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e MC |
1182 | { |
1183 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1184 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4a42e264 SL |
1185 | |
1186 | #ifdef FIPS_MODE | |
1187 | return 0; | |
1188 | #else | |
1189 | { | |
1190 | int kl; | |
1191 | ||
1192 | kl = EVP_CIPHER_CTX_key_length(ctx); | |
1193 | if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0) | |
1194 | return 0; | |
1195 | return 1; | |
1196 | } | |
1197 | #endif /* FIPS_MODE */ | |
0f113f3e | 1198 | } |
216659eb | 1199 | |
c2bf7208 | 1200 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1201 | { |
1202 | if ((in == NULL) || (in->cipher == NULL)) { | |
1203 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
1204 | return 0; | |
1205 | } | |
df05f2ce MC |
1206 | |
1207 | if (in->cipher->prov == NULL) | |
1208 | goto legacy; | |
1209 | ||
1210 | if (in->cipher->dupctx == NULL) { | |
1211 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | EVP_CIPHER_CTX_reset(out); | |
1216 | ||
1217 | *out = *in; | |
1218 | out->provctx = NULL; | |
1219 | ||
70c35fd1 | 1220 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1221 | out->fetched_cipher = NULL; |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | out->provctx = in->cipher->dupctx(in->provctx); | |
1226 | if (out->provctx == NULL) { | |
1227 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | return 1; | |
1232 | ||
1233 | /* TODO(3.0): Remove legacy code below */ | |
1234 | legacy: | |
1235 | ||
319e518a | 1236 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e MC |
1237 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1238 | if (in->engine && !ENGINE_init(in->engine)) { | |
1239 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
1240 | return 0; | |
1241 | } | |
c2bf7208 DSH |
1242 | #endif |
1243 | ||
c0ca39bd | 1244 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1245 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1246 | |
1247 | if (in->cipher_data && in->cipher->ctx_size) { | |
1248 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1249 | if (out->cipher_data == NULL) { |
273a0218 | 1250 | out->cipher = NULL; |
0f113f3e MC |
1251 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); |
1252 | return 0; | |
1253 | } | |
1254 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1255 | } | |
1256 | ||
1257 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1258 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1259 | out->cipher = NULL; | |
1260 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
1261 | return 0; | |
1262 | } | |
0f113f3e MC |
1263 | return 1; |
1264 | } | |
df05f2ce | 1265 | |
550f974a RL |
1266 | EVP_CIPHER *evp_cipher_new(void) |
1267 | { | |
1268 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1269 | ||
1270 | if (cipher != NULL) { | |
1271 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1272 | if (cipher->lock == NULL) { | |
1273 | OPENSSL_free(cipher); | |
1274 | return NULL; | |
1275 | } | |
1276 | cipher->refcnt = 1; | |
1277 | } | |
1278 | return cipher; | |
1279 | } | |
1280 | ||
6b9e3724 RL |
1281 | static void *evp_cipher_from_dispatch(const char *name, |
1282 | const OSSL_DISPATCH *fns, | |
3ca9d210 RL |
1283 | OSSL_PROVIDER *prov, |
1284 | void *unused) | |
df05f2ce MC |
1285 | { |
1286 | EVP_CIPHER *cipher = NULL; | |
1287 | int fnciphcnt = 0, fnctxcnt = 0; | |
1288 | ||
550f974a | 1289 | if ((cipher = evp_cipher_new()) == NULL |
6b9e3724 | 1290 | || (cipher->name = OPENSSL_strdup(name)) == NULL) { |
550f974a | 1291 | EVP_CIPHER_free(cipher); |
6b9e3724 | 1292 | EVPerr(0, ERR_R_MALLOC_FAILURE); |
df05f2ce | 1293 | return NULL; |
6b9e3724 | 1294 | } |
df05f2ce | 1295 | |
ed71e917 MC |
1296 | #ifndef FIPS_MODE |
1297 | /* | |
1298 | * FIPS module note: since internal fetches will be entirely | |
1299 | * provider based, we know that none of its code depends on legacy | |
1300 | * NIDs or any functionality that use them. | |
1301 | * | |
1302 | * TODO(3.x) get rid of the need for legacy NIDs | |
1303 | */ | |
1304 | cipher->nid = OBJ_sn2nid(name); | |
1305 | #endif | |
1306 | ||
df05f2ce MC |
1307 | for (; fns->function_id != 0; fns++) { |
1308 | switch (fns->function_id) { | |
1309 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1310 | if (cipher->newctx != NULL) | |
1311 | break; | |
1312 | cipher->newctx = OSSL_get_OP_cipher_newctx(fns); | |
1313 | fnctxcnt++; | |
1314 | break; | |
1315 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1316 | if (cipher->einit != NULL) | |
1317 | break; | |
1318 | cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns); | |
1319 | fnciphcnt++; | |
1320 | break; | |
1321 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1322 | if (cipher->dinit != NULL) | |
1323 | break; | |
1324 | cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns); | |
1325 | fnciphcnt++; | |
1326 | break; | |
1327 | case OSSL_FUNC_CIPHER_UPDATE: | |
1328 | if (cipher->cupdate != NULL) | |
1329 | break; | |
1330 | cipher->cupdate = OSSL_get_OP_cipher_update(fns); | |
1331 | fnciphcnt++; | |
1332 | break; | |
1333 | case OSSL_FUNC_CIPHER_FINAL: | |
1334 | if (cipher->cfinal != NULL) | |
1335 | break; | |
1336 | cipher->cfinal = OSSL_get_OP_cipher_final(fns); | |
1337 | fnciphcnt++; | |
1338 | break; | |
718b133a MC |
1339 | case OSSL_FUNC_CIPHER_CIPHER: |
1340 | if (cipher->ccipher != NULL) | |
1341 | break; | |
1342 | cipher->ccipher = OSSL_get_OP_cipher_cipher(fns); | |
1343 | break; | |
df05f2ce MC |
1344 | case OSSL_FUNC_CIPHER_FREECTX: |
1345 | if (cipher->freectx != NULL) | |
1346 | break; | |
1347 | cipher->freectx = OSSL_get_OP_cipher_freectx(fns); | |
1348 | fnctxcnt++; | |
1349 | break; | |
1350 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1351 | if (cipher->dupctx != NULL) | |
1352 | break; | |
1353 | cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns); | |
1354 | break; | |
df05f2ce MC |
1355 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1356 | if (cipher->get_params != NULL) | |
1357 | break; | |
1358 | cipher->get_params = OSSL_get_OP_cipher_get_params(fns); | |
1359 | break; | |
92d9d0ae RL |
1360 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
1361 | if (cipher->get_ctx_params != NULL) | |
718b133a | 1362 | break; |
92d9d0ae | 1363 | cipher->get_ctx_params = OSSL_get_OP_cipher_get_ctx_params(fns); |
718b133a | 1364 | break; |
92d9d0ae RL |
1365 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
1366 | if (cipher->set_ctx_params != NULL) | |
df05f2ce | 1367 | break; |
92d9d0ae | 1368 | cipher->set_ctx_params = OSSL_get_OP_cipher_set_ctx_params(fns); |
df05f2ce | 1369 | break; |
ae3ff60e RL |
1370 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
1371 | if (cipher->gettable_params != NULL) | |
1372 | break; | |
1373 | cipher->gettable_params = OSSL_get_OP_cipher_gettable_params(fns); | |
1374 | break; | |
1375 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1376 | if (cipher->gettable_ctx_params != NULL) | |
1377 | break; | |
1378 | cipher->gettable_ctx_params = | |
1379 | OSSL_get_OP_cipher_gettable_ctx_params(fns); | |
1380 | break; | |
1381 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1382 | if (cipher->settable_ctx_params != NULL) | |
1383 | break; | |
1384 | cipher->settable_ctx_params = | |
1385 | OSSL_get_OP_cipher_settable_ctx_params(fns); | |
1386 | break; | |
df05f2ce MC |
1387 | } |
1388 | } | |
718b133a MC |
1389 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1390 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1391 | || fnctxcnt != 2) { |
df05f2ce MC |
1392 | /* |
1393 | * In order to be a consistent set of functions we must have at least | |
1394 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1395 | * functions, or a single "cipher" function. In all cases we need both |
1396 | * the "newctx" and "freectx" functions. | |
df05f2ce | 1397 | */ |
550f974a | 1398 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1399 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
1400 | return NULL; | |
1401 | } | |
1402 | cipher->prov = prov; | |
1403 | if (prov != NULL) | |
7c95390e | 1404 | ossl_provider_up_ref(prov); |
df05f2ce MC |
1405 | |
1406 | return cipher; | |
1407 | } | |
1408 | ||
70c35fd1 | 1409 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1410 | { |
70c35fd1 | 1411 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1412 | } |
1413 | ||
1414 | static void evp_cipher_free(void *cipher) | |
1415 | { | |
550f974a | 1416 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1417 | } |
1418 | ||
df05f2ce MC |
1419 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, |
1420 | const char *properties) | |
1421 | { | |
0211740f RL |
1422 | EVP_CIPHER *cipher = |
1423 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
3ca9d210 | 1424 | evp_cipher_from_dispatch, NULL, evp_cipher_up_ref, |
0211740f RL |
1425 | evp_cipher_free); |
1426 | ||
0211740f | 1427 | return cipher; |
df05f2ce | 1428 | } |
c540f00f | 1429 | |
550f974a RL |
1430 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
1431 | { | |
1432 | int ref = 0; | |
1433 | ||
1434 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
1435 | return 1; | |
1436 | } | |
1437 | ||
1438 | void EVP_CIPHER_free(EVP_CIPHER *cipher) | |
1439 | { | |
1440 | int i; | |
1441 | ||
1442 | if (cipher == NULL) | |
1443 | return; | |
1444 | ||
1445 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1446 | if (i > 0) | |
1447 | return; | |
1448 | ossl_provider_free(cipher->prov); | |
1449 | OPENSSL_free(cipher->name); | |
1450 | CRYPTO_THREAD_lock_free(cipher->lock); | |
1451 | OPENSSL_free(cipher); | |
1452 | } | |
1453 | ||
c540f00f RL |
1454 | void EVP_CIPHER_do_all_ex(OPENSSL_CTX *libctx, |
1455 | void (*fn)(EVP_CIPHER *mac, void *arg), | |
1456 | void *arg) | |
1457 | { | |
1458 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1459 | (void (*)(void *, void *))fn, arg, | |
3ca9d210 | 1460 | evp_cipher_from_dispatch, NULL, evp_cipher_free); |
c540f00f | 1461 | } |