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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: | |
3837c202 SL |
168 | case NID_aes_256_ocb: |
169 | case NID_aes_192_ocb: | |
170 | case NID_aes_128_ocb: | |
a672a02a SL |
171 | case NID_aes_256_gcm: |
172 | case NID_aes_192_gcm: | |
173 | case NID_aes_128_gcm: | |
ca392b29 SL |
174 | case NID_id_aes256_wrap: |
175 | case NID_id_aes256_wrap_pad: | |
176 | case NID_id_aes192_wrap: | |
177 | case NID_id_aes192_wrap_pad: | |
178 | case NID_id_aes128_wrap: | |
179 | case NID_id_aes128_wrap_pad: | |
a672a02a SL |
180 | case NID_aria_256_gcm: |
181 | case NID_aria_192_gcm: | |
182 | case NID_aria_128_gcm: | |
3bfe9005 SL |
183 | case NID_aes_256_ccm: |
184 | case NID_aes_192_ccm: | |
185 | case NID_aes_128_ccm: | |
186 | case NID_aria_256_ccm: | |
187 | case NID_aria_192_ccm: | |
188 | case NID_aria_128_ccm: | |
e1178600 SL |
189 | case NID_aria_256_ecb: |
190 | case NID_aria_192_ecb: | |
191 | case NID_aria_128_ecb: | |
192 | case NID_aria_256_cbc: | |
193 | case NID_aria_192_cbc: | |
194 | case NID_aria_128_cbc: | |
195 | case NID_aria_256_ofb128: | |
196 | case NID_aria_192_ofb128: | |
197 | case NID_aria_128_ofb128: | |
198 | case NID_aria_256_cfb128: | |
199 | case NID_aria_192_cfb128: | |
200 | case NID_aria_128_cfb128: | |
201 | case NID_aria_256_cfb1: | |
202 | case NID_aria_192_cfb1: | |
203 | case NID_aria_128_cfb1: | |
204 | case NID_aria_256_cfb8: | |
205 | case NID_aria_192_cfb8: | |
206 | case NID_aria_128_cfb8: | |
207 | case NID_aria_256_ctr: | |
208 | case NID_aria_192_ctr: | |
209 | case NID_aria_128_ctr: | |
210 | case NID_camellia_256_ecb: | |
211 | case NID_camellia_192_ecb: | |
212 | case NID_camellia_128_ecb: | |
213 | case NID_camellia_256_cbc: | |
214 | case NID_camellia_192_cbc: | |
215 | case NID_camellia_128_cbc: | |
216 | case NID_camellia_256_ofb128: | |
217 | case NID_camellia_192_ofb128: | |
218 | case NID_camellia_128_ofb128: | |
219 | case NID_camellia_256_cfb128: | |
220 | case NID_camellia_192_cfb128: | |
221 | case NID_camellia_128_cfb128: | |
222 | case NID_camellia_256_cfb1: | |
223 | case NID_camellia_192_cfb1: | |
224 | case NID_camellia_128_cfb1: | |
225 | case NID_camellia_256_cfb8: | |
226 | case NID_camellia_192_cfb8: | |
227 | case NID_camellia_128_cfb8: | |
228 | case NID_camellia_256_ctr: | |
229 | case NID_camellia_192_ctr: | |
230 | case NID_camellia_128_ctr: | |
4a42e264 SL |
231 | case NID_des_ede3_cbc: |
232 | case NID_des_ede3_ecb: | |
233 | case NID_des_ede3_ofb64: | |
234 | case NID_des_ede3_cfb64: | |
235 | case NID_des_ede3_cfb8: | |
236 | case NID_des_ede3_cfb1: | |
237 | case NID_des_ede_cbc: | |
238 | case NID_des_ede_ecb: | |
239 | case NID_des_ede_ofb64: | |
240 | case NID_des_ede_cfb64: | |
241 | case NID_desx_cbc: | |
242 | case NID_id_smime_alg_CMS3DESwrap: | |
55c7dc79 SL |
243 | case NID_bf_cbc: |
244 | case NID_bf_ecb: | |
245 | case NID_bf_cfb64: | |
246 | case NID_bf_ofb64: | |
f22431f2 SL |
247 | case NID_idea_cbc: |
248 | case NID_idea_ecb: | |
249 | case NID_idea_cfb64: | |
250 | case NID_idea_ofb64: | |
18b00427 SL |
251 | case NID_cast5_cbc: |
252 | case NID_cast5_ecb: | |
253 | case NID_cast5_cfb64: | |
254 | case NID_cast5_ofb64: | |
70adc646 SL |
255 | case NID_seed_cbc: |
256 | case NID_seed_ecb: | |
257 | case NID_seed_cfb128: | |
258 | case NID_seed_ofb128: | |
105dde25 SL |
259 | case NID_sm4_cbc: |
260 | case NID_sm4_ecb: | |
261 | case NID_sm4_ctr: | |
262 | case NID_sm4_cfb128: | |
263 | case NID_sm4_ofb128: | |
aab26e6f | 264 | break; |
df05f2ce MC |
265 | default: |
266 | goto legacy; | |
267 | } | |
268 | } | |
269 | ||
270 | /* | |
271 | * Ensure a context left lying around from last time is cleared | |
272 | * (legacy code) | |
273 | */ | |
274 | if (cipher != NULL && ctx->cipher != NULL) { | |
275 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
276 | ctx->cipher_data = NULL; | |
277 | } | |
278 | ||
279 | ||
280 | /* TODO(3.0): Start of non-legacy code below */ | |
281 | ||
282 | /* Ensure a context left lying around from last time is cleared */ | |
283 | if (cipher != NULL && ctx->cipher != NULL) { | |
284 | unsigned long flags = ctx->flags; | |
285 | ||
286 | EVP_CIPHER_CTX_reset(ctx); | |
287 | /* Restore encrypt and flags */ | |
288 | ctx->encrypt = enc; | |
289 | ctx->flags = flags; | |
290 | } | |
291 | ||
7f612b1f | 292 | if (cipher == NULL) |
df05f2ce MC |
293 | cipher = ctx->cipher; |
294 | ||
295 | if (cipher->prov == NULL) { | |
319e518a MC |
296 | #ifdef FIPS_MODE |
297 | /* We only do explict fetches inside the FIPS module */ | |
298 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
299 | return 0; | |
300 | #else | |
301 | EVP_CIPHER *provciph = | |
302 | EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), ""); | |
303 | ||
df05f2ce MC |
304 | if (provciph == NULL) { |
305 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
306 | return 0; | |
307 | } | |
308 | cipher = provciph; | |
550f974a | 309 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 310 | ctx->fetched_cipher = provciph; |
319e518a | 311 | #endif |
df05f2ce MC |
312 | } |
313 | ||
314 | ctx->cipher = cipher; | |
315 | if (ctx->provctx == NULL) { | |
a39eb840 | 316 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
df05f2ce MC |
317 | if (ctx->provctx == NULL) { |
318 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
319 | return 0; | |
320 | } | |
321 | } | |
322 | ||
323 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 324 | /* |
df05f2ce MC |
325 | * If this ctx was already set up for no padding then we need to tell |
326 | * the new cipher about it. | |
327 | */ | |
328 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
329 | return 0; | |
330 | } | |
331 | ||
718b133a MC |
332 | switch (EVP_CIPHER_mode(ctx->cipher)) { |
333 | case EVP_CIPH_CFB_MODE: | |
334 | case EVP_CIPH_OFB_MODE: | |
335 | case EVP_CIPH_CBC_MODE: | |
336 | /* For these modes we remember the original IV for later use */ | |
337 | if (!ossl_assert(EVP_CIPHER_CTX_iv_length(ctx) <= (int)sizeof(ctx->oiv))) { | |
338 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
339 | return 0; | |
340 | } | |
341 | if (iv != NULL) | |
342 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
343 | } | |
344 | ||
df05f2ce MC |
345 | if (enc) { |
346 | if (ctx->cipher->einit == NULL) { | |
347 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
348 | return 0; | |
349 | } | |
350 | ||
344cfa34 MC |
351 | return ctx->cipher->einit(ctx->provctx, |
352 | key, | |
33b40a10 MC |
353 | key == NULL ? 0 |
354 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 355 | iv, |
33b40a10 MC |
356 | iv == NULL ? 0 |
357 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
358 | } |
359 | ||
360 | if (ctx->cipher->dinit == NULL) { | |
361 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
362 | return 0; | |
363 | } | |
364 | ||
344cfa34 MC |
365 | return ctx->cipher->dinit(ctx->provctx, |
366 | key, | |
33b40a10 MC |
367 | key == NULL ? 0 |
368 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 369 | iv, |
33b40a10 MC |
370 | iv == NULL ? 0 |
371 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
372 | |
373 | /* TODO(3.0): Remove legacy code below */ | |
374 | legacy: | |
375 | ||
376 | if (cipher != NULL) { | |
377 | /* | |
378 | * Ensure a context left lying around from last time is cleared (we | |
379 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
380 | * EVP_CIPHER could be used). |
381 | */ | |
382 | if (ctx->cipher) { | |
383 | unsigned long flags = ctx->flags; | |
c0ca39bd | 384 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
385 | /* Restore encrypt and flags */ |
386 | ctx->encrypt = enc; | |
387 | ctx->flags = flags; | |
388 | } | |
319e518a | 389 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
df05f2ce | 390 | if (impl != NULL) { |
0f113f3e MC |
391 | if (!ENGINE_init(impl)) { |
392 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
393 | return 0; | |
394 | } | |
df05f2ce MC |
395 | } else { |
396 | impl = tmpimpl; | |
397 | } | |
398 | if (impl != NULL) { | |
0f113f3e MC |
399 | /* There's an ENGINE for this job ... (apparently) */ |
400 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
401 | |
402 | if (c == NULL) { | |
0f113f3e MC |
403 | /* |
404 | * One positive side-effect of US's export control history, | |
405 | * is that we should at least be able to avoid using US | |
0d4fb843 | 406 | * misspellings of "initialisation"? |
0f113f3e MC |
407 | */ |
408 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
409 | return 0; | |
410 | } | |
411 | /* We'll use the ENGINE's private cipher definition */ | |
412 | cipher = c; | |
413 | /* | |
414 | * Store the ENGINE functional reference so we know 'cipher' came | |
415 | * from an ENGINE and we need to release it when done. | |
416 | */ | |
417 | ctx->engine = impl; | |
df05f2ce | 418 | } else { |
0f113f3e | 419 | ctx->engine = NULL; |
df05f2ce | 420 | } |
0b13e9f0 | 421 | #endif |
544a2aea | 422 | |
0f113f3e MC |
423 | ctx->cipher = cipher; |
424 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 425 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 426 | if (ctx->cipher_data == NULL) { |
273a0218 | 427 | ctx->cipher = NULL; |
0f113f3e MC |
428 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); |
429 | return 0; | |
430 | } | |
431 | } else { | |
432 | ctx->cipher_data = NULL; | |
433 | } | |
434 | ctx->key_len = cipher->key_len; | |
435 | /* Preserve wrap enable flag, zero everything else */ | |
436 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
437 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
438 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 439 | ctx->cipher = NULL; |
0f113f3e MC |
440 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
441 | return 0; | |
442 | } | |
443 | } | |
0f113f3e | 444 | } |
319e518a | 445 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e | 446 | skip_to_init: |
0b13e9f0 | 447 | #endif |
1702c500 P |
448 | if (ctx->cipher == NULL) |
449 | return 0; | |
450 | ||
0f113f3e MC |
451 | /* we assume block size is a power of 2 in *cryptUpdate */ |
452 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
453 | || ctx->cipher->block_size == 8 | |
454 | || ctx->cipher->block_size == 16); | |
455 | ||
456 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
457 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
458 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
459 | return 0; | |
460 | } | |
461 | ||
480d3323 | 462 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
463 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
464 | ||
465 | case EVP_CIPH_STREAM_CIPHER: | |
466 | case EVP_CIPH_ECB_MODE: | |
467 | break; | |
468 | ||
469 | case EVP_CIPH_CFB_MODE: | |
470 | case EVP_CIPH_OFB_MODE: | |
471 | ||
472 | ctx->num = 0; | |
473 | /* fall-through */ | |
474 | ||
475 | case EVP_CIPH_CBC_MODE: | |
476 | ||
477 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
478 | (int)sizeof(ctx->iv)); | |
479 | if (iv) | |
480 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
481 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
482 | break; | |
483 | ||
484 | case EVP_CIPH_CTR_MODE: | |
485 | ctx->num = 0; | |
486 | /* Don't reuse IV for CTR mode */ | |
487 | if (iv) | |
488 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
489 | break; | |
490 | ||
491 | default: | |
492 | return 0; | |
0f113f3e MC |
493 | } |
494 | } | |
495 | ||
496 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
497 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
498 | return 0; | |
499 | } | |
500 | ctx->buf_len = 0; | |
501 | ctx->final_used = 0; | |
502 | ctx->block_mask = ctx->cipher->block_size - 1; | |
503 | return 1; | |
504 | } | |
d02b48c6 | 505 | |
be06a934 | 506 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
507 | const unsigned char *in, int inl) |
508 | { | |
509 | if (ctx->encrypt) | |
510 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
511 | else | |
512 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
513 | } | |
d02b48c6 | 514 | |
581f1c84 | 515 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
516 | { |
517 | if (ctx->encrypt) | |
518 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
519 | else | |
520 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
521 | } | |
581f1c84 | 522 | |
6b691a5c | 523 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
524 | { |
525 | if (ctx->encrypt) | |
526 | return EVP_EncryptFinal(ctx, out, outl); | |
527 | else | |
528 | return EVP_DecryptFinal(ctx, out, outl); | |
529 | } | |
d02b48c6 | 530 | |
be06a934 | 531 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
532 | const unsigned char *key, const unsigned char *iv) |
533 | { | |
534 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
535 | } | |
18eda732 | 536 | |
0f113f3e MC |
537 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
538 | ENGINE *impl, const unsigned char *key, | |
539 | const unsigned char *iv) | |
540 | { | |
541 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
542 | } | |
d02b48c6 | 543 | |
be06a934 | 544 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
545 | const unsigned char *key, const unsigned char *iv) |
546 | { | |
547 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
548 | } | |
18eda732 | 549 | |
0f113f3e MC |
550 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
551 | ENGINE *impl, const unsigned char *key, | |
552 | const unsigned char *iv) | |
553 | { | |
554 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
555 | } | |
d02b48c6 | 556 | |
c3a73daf AP |
557 | /* |
558 | * According to the letter of standard difference between pointers | |
559 | * is specified to be valid only within same object. This makes | |
560 | * it formally challenging to determine if input and output buffers | |
561 | * are not partially overlapping with standard pointer arithmetic. | |
562 | */ | |
563 | #ifdef PTRDIFF_T | |
564 | # undef PTRDIFF_T | |
565 | #endif | |
566 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
567 | /* | |
568 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
569 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
570 | * difference between two pointers might be truncated to 32 bits. | |
571 | * In the context one can even wonder how comparison for | |
572 | * equality is implemented. To be on the safe side we adhere to | |
573 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
574 | */ |
575 | # define PTRDIFF_T uint64_t | |
576 | #else | |
577 | # define PTRDIFF_T size_t | |
578 | #endif | |
579 | ||
7141ba31 | 580 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
581 | { |
582 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
583 | /* | |
584 | * Check for partially overlapping buffers. [Binary logical | |
585 | * operations are used instead of boolean to minimize number | |
586 | * of conditional branches.] | |
587 | */ | |
83151b73 AP |
588 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
589 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 590 | |
83151b73 | 591 | return overlapped; |
c3a73daf AP |
592 | } |
593 | ||
a8bf2f8f RL |
594 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
595 | unsigned char *out, int *outl, | |
596 | const unsigned char *in, int inl) | |
0f113f3e | 597 | { |
64846096 LP |
598 | int i, j, bl, cmpl = inl; |
599 | ||
600 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
601 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 602 | |
7141ba31 MC |
603 | bl = ctx->cipher->block_size; |
604 | ||
0f113f3e | 605 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 606 | /* If block size > 1 then the cipher will have to do this check */ |
64846096 | 607 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { |
a8bf2f8f | 608 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 609 | return 0; |
83151b73 | 610 | } |
5fc77684 | 611 | |
0f113f3e MC |
612 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
613 | if (i < 0) | |
614 | return 0; | |
615 | else | |
616 | *outl = i; | |
617 | return 1; | |
618 | } | |
619 | ||
2c236894 MC |
620 | if (inl <= 0) { |
621 | *outl = 0; | |
622 | return inl == 0; | |
623 | } | |
64846096 | 624 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
a8bf2f8f | 625 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 626 | return 0; |
83151b73 | 627 | } |
0f113f3e MC |
628 | |
629 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
630 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
631 | *outl = inl; | |
632 | return 1; | |
633 | } else { | |
634 | *outl = 0; | |
635 | return 0; | |
636 | } | |
637 | } | |
638 | i = ctx->buf_len; | |
0f113f3e MC |
639 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
640 | if (i != 0) { | |
3f358213 | 641 | if (bl - i > inl) { |
0f113f3e MC |
642 | memcpy(&(ctx->buf[i]), in, inl); |
643 | ctx->buf_len += inl; | |
644 | *outl = 0; | |
645 | return 1; | |
646 | } else { | |
647 | j = bl - i; | |
648 | memcpy(&(ctx->buf[i]), in, j); | |
0f113f3e MC |
649 | inl -= j; |
650 | in += j; | |
5fc77684 AP |
651 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
652 | return 0; | |
0f113f3e MC |
653 | out += bl; |
654 | *outl = bl; | |
655 | } | |
656 | } else | |
657 | *outl = 0; | |
658 | i = inl & (bl - 1); | |
659 | inl -= i; | |
660 | if (inl > 0) { | |
661 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
662 | return 0; | |
663 | *outl += inl; | |
664 | } | |
665 | ||
666 | if (i != 0) | |
667 | memcpy(ctx->buf, &(in[inl]), i); | |
668 | ctx->buf_len = i; | |
669 | return 1; | |
670 | } | |
d02b48c6 | 671 | |
a8bf2f8f RL |
672 | |
673 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
674 | const unsigned char *in, int inl) | |
675 | { | |
df05f2ce MC |
676 | int ret; |
677 | size_t soutl; | |
3b94944c | 678 | int blocksize; |
df05f2ce | 679 | |
a8bf2f8f RL |
680 | /* Prevent accidental use of decryption context when encrypting */ |
681 | if (!ctx->encrypt) { | |
682 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
683 | return 0; | |
684 | } | |
685 | ||
d4d89a07 SS |
686 | if (ctx->cipher == NULL) { |
687 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
688 | return 0; | |
689 | } | |
690 | ||
691 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
692 | goto legacy; |
693 | ||
3b94944c MC |
694 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
695 | ||
696 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
697 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); |
698 | return 0; | |
699 | } | |
3b94944c MC |
700 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
701 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
702 | (size_t)inl); | |
df05f2ce | 703 | |
36e619d7 GV |
704 | if (ret) { |
705 | if (soutl > INT_MAX) { | |
706 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
707 | return 0; | |
708 | } | |
709 | *outl = soutl; | |
df05f2ce | 710 | } |
36e619d7 | 711 | |
df05f2ce MC |
712 | return ret; |
713 | ||
714 | /* TODO(3.0): Remove legacy code below */ | |
715 | legacy: | |
716 | ||
a8bf2f8f RL |
717 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
718 | } | |
719 | ||
be06a934 | 720 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
721 | { |
722 | int ret; | |
723 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
724 | return ret; | |
725 | } | |
581f1c84 DSH |
726 | |
727 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
728 | { |
729 | int n, ret; | |
730 | unsigned int i, b, bl; | |
df05f2ce | 731 | size_t soutl; |
3b94944c | 732 | int blocksize; |
0f113f3e | 733 | |
a8bf2f8f RL |
734 | /* Prevent accidental use of decryption context when encrypting */ |
735 | if (!ctx->encrypt) { | |
736 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
737 | return 0; | |
738 | } | |
739 | ||
4894dcad P |
740 | if (ctx->cipher == NULL) { |
741 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
742 | return 0; | |
743 | } | |
744 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
745 | goto legacy; |
746 | ||
3b94944c MC |
747 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
748 | ||
749 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
750 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
751 | return 0; | |
752 | } | |
753 | ||
3b94944c MC |
754 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
755 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce | 756 | |
36e619d7 GV |
757 | if (ret) { |
758 | if (soutl > INT_MAX) { | |
759 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
760 | return 0; | |
761 | } | |
762 | *outl = soutl; | |
df05f2ce | 763 | } |
df05f2ce MC |
764 | |
765 | return ret; | |
766 | ||
767 | /* TODO(3.0): Remove legacy code below */ | |
768 | legacy: | |
769 | ||
0f113f3e MC |
770 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
771 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
772 | if (ret < 0) | |
773 | return 0; | |
774 | else | |
775 | *outl = ret; | |
776 | return 1; | |
777 | } | |
778 | ||
779 | b = ctx->cipher->block_size; | |
cbe29648 | 780 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
781 | if (b == 1) { |
782 | *outl = 0; | |
783 | return 1; | |
784 | } | |
785 | bl = ctx->buf_len; | |
786 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
787 | if (bl) { | |
788 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
789 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
790 | return 0; | |
791 | } | |
792 | *outl = 0; | |
793 | return 1; | |
794 | } | |
795 | ||
796 | n = b - bl; | |
797 | for (i = bl; i < b; i++) | |
798 | ctx->buf[i] = n; | |
799 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
800 | ||
801 | if (ret) | |
802 | *outl = b; | |
803 | ||
804 | return ret; | |
805 | } | |
d02b48c6 | 806 | |
be06a934 | 807 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
808 | const unsigned char *in, int inl) |
809 | { | |
df05f2ce | 810 | int fix_len, cmpl = inl, ret; |
0f113f3e | 811 | unsigned int b; |
df05f2ce | 812 | size_t soutl; |
3b94944c | 813 | int blocksize; |
0f113f3e | 814 | |
a8bf2f8f RL |
815 | /* Prevent accidental use of encryption context when decrypting */ |
816 | if (ctx->encrypt) { | |
817 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
818 | return 0; | |
819 | } | |
820 | ||
d2c2e49e P |
821 | if (ctx->cipher == NULL) { |
822 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
823 | return 0; | |
824 | } | |
825 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
826 | goto legacy; |
827 | ||
3b94944c MC |
828 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
829 | ||
830 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
831 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); |
832 | return 0; | |
833 | } | |
3b94944c MC |
834 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
835 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
836 | (size_t)inl); | |
df05f2ce MC |
837 | |
838 | if (ret) { | |
839 | if (soutl > INT_MAX) { | |
840 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
841 | return 0; | |
842 | } | |
843 | *outl = soutl; | |
844 | } | |
845 | ||
846 | return ret; | |
847 | ||
848 | /* TODO(3.0): Remove legacy code below */ | |
849 | legacy: | |
850 | ||
7141ba31 MC |
851 | b = ctx->cipher->block_size; |
852 | ||
64846096 LP |
853 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
854 | cmpl = (cmpl + 7) / 8; | |
855 | ||
0f113f3e | 856 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
64846096 | 857 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { |
83151b73 | 858 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 859 | return 0; |
83151b73 | 860 | } |
5fc77684 | 861 | |
0f113f3e MC |
862 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
863 | if (fix_len < 0) { | |
864 | *outl = 0; | |
865 | return 0; | |
866 | } else | |
867 | *outl = fix_len; | |
868 | return 1; | |
869 | } | |
870 | ||
2c236894 MC |
871 | if (inl <= 0) { |
872 | *outl = 0; | |
873 | return inl == 0; | |
874 | } | |
875 | ||
0f113f3e | 876 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 877 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 878 | |
cbe29648 | 879 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
880 | |
881 | if (ctx->final_used) { | |
5fc77684 AP |
882 | /* see comment about PTRDIFF_T comparison above */ |
883 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
83151b73 AP |
884 | || is_partially_overlapping(out, in, b)) { |
885 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
5fc77684 | 886 | return 0; |
83151b73 | 887 | } |
0f113f3e MC |
888 | memcpy(out, ctx->final, b); |
889 | out += b; | |
890 | fix_len = 1; | |
891 | } else | |
892 | fix_len = 0; | |
893 | ||
a8bf2f8f | 894 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
895 | return 0; |
896 | ||
897 | /* | |
898 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
899 | * copy of this last block | |
900 | */ | |
901 | if (b > 1 && !ctx->buf_len) { | |
902 | *outl -= b; | |
903 | ctx->final_used = 1; | |
904 | memcpy(ctx->final, &out[*outl], b); | |
905 | } else | |
906 | ctx->final_used = 0; | |
907 | ||
908 | if (fix_len) | |
909 | *outl += b; | |
910 | ||
911 | return 1; | |
912 | } | |
d02b48c6 | 913 | |
6b691a5c | 914 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
915 | { |
916 | int ret; | |
917 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
918 | return ret; | |
919 | } | |
581f1c84 DSH |
920 | |
921 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
922 | { |
923 | int i, n; | |
924 | unsigned int b; | |
df05f2ce MC |
925 | size_t soutl; |
926 | int ret; | |
3b94944c | 927 | int blocksize; |
a8bf2f8f RL |
928 | |
929 | /* Prevent accidental use of encryption context when decrypting */ | |
930 | if (ctx->encrypt) { | |
931 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
932 | return 0; | |
933 | } | |
934 | ||
d4d89a07 SS |
935 | if (ctx->cipher == NULL) { |
936 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
937 | return 0; | |
938 | } | |
939 | ||
940 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
941 | goto legacy; |
942 | ||
3b94944c MC |
943 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
944 | ||
945 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
946 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
947 | return 0; | |
948 | } | |
949 | ||
3b94944c MC |
950 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
951 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
952 | |
953 | if (ret) { | |
954 | if (soutl > INT_MAX) { | |
955 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
956 | return 0; | |
957 | } | |
958 | *outl = soutl; | |
959 | } | |
960 | ||
961 | return ret; | |
962 | ||
963 | /* TODO(3.0): Remove legacy code below */ | |
964 | legacy: | |
965 | ||
0f113f3e | 966 | *outl = 0; |
0f113f3e MC |
967 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
968 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
969 | if (i < 0) | |
970 | return 0; | |
971 | else | |
972 | *outl = i; | |
973 | return 1; | |
974 | } | |
975 | ||
976 | b = ctx->cipher->block_size; | |
977 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
978 | if (ctx->buf_len) { | |
979 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
980 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
981 | return 0; | |
982 | } | |
983 | *outl = 0; | |
984 | return 1; | |
985 | } | |
986 | if (b > 1) { | |
987 | if (ctx->buf_len || !ctx->final_used) { | |
988 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
26a7d938 | 989 | return 0; |
0f113f3e | 990 | } |
cbe29648 | 991 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
992 | |
993 | /* | |
994 | * The following assumes that the ciphertext has been authenticated. | |
995 | * Otherwise it provides a padding oracle. | |
996 | */ | |
997 | n = ctx->final[b - 1]; | |
998 | if (n == 0 || n > (int)b) { | |
999 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 1000 | return 0; |
0f113f3e MC |
1001 | } |
1002 | for (i = 0; i < n; i++) { | |
1003 | if (ctx->final[--b] != n) { | |
1004 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 1005 | return 0; |
0f113f3e MC |
1006 | } |
1007 | } | |
1008 | n = ctx->cipher->block_size - n; | |
1009 | for (i = 0; i < n; i++) | |
1010 | out[i] = ctx->final[i]; | |
1011 | *outl = n; | |
1012 | } else | |
1013 | *outl = 0; | |
208fb891 | 1014 | return 1; |
0f113f3e | 1015 | } |
d02b48c6 | 1016 | |
6343829a | 1017 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 1018 | { |
459b15d4 SL |
1019 | int ok; |
1020 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
1c3ace68 | 1021 | size_t len = keylen; |
459b15d4 | 1022 | |
1c3ace68 | 1023 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); |
459b15d4 | 1024 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params); |
13273237 | 1025 | |
e870791a | 1026 | if (ok != EVP_CTRL_RET_UNSUPPORTED) |
13273237 RL |
1027 | return ok; |
1028 | ||
1029 | /* TODO(3.0) legacy code follows */ | |
0f113f3e MC |
1030 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
1031 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 1032 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
1033 | return 1; |
1034 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
1035 | c->key_len = keylen; | |
1036 | return 1; | |
1037 | } | |
1038 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
1039 | return 0; | |
1040 | } | |
49528751 | 1041 | |
f2e5ca84 | 1042 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 1043 | { |
13273237 | 1044 | int ok; |
459b15d4 | 1045 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
1c3ace68 | 1046 | unsigned int pd = pad; |
13273237 | 1047 | |
0f113f3e MC |
1048 | if (pad) |
1049 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
1050 | else | |
1051 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 1052 | |
1c3ace68 | 1053 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
459b15d4 SL |
1054 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1055 | ||
13273237 | 1056 | return ok != 0; |
0f113f3e | 1057 | } |
f2e5ca84 | 1058 | |
49528751 DSH |
1059 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
1060 | { | |
e870791a | 1061 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 | 1062 | int set_params = 1; |
1c3ace68 | 1063 | size_t sz = arg; |
459b15d4 | 1064 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
d91f4568 | 1065 | |
459b15d4 | 1066 | if (ctx == NULL || ctx->cipher == NULL) { |
0f113f3e MC |
1067 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); |
1068 | return 0; | |
1069 | } | |
1070 | ||
13273237 RL |
1071 | if (ctx->cipher->prov == NULL) |
1072 | goto legacy; | |
1073 | ||
1074 | switch (type) { | |
1075 | case EVP_CTRL_SET_KEY_LENGTH: | |
1c3ace68 | 1076 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
13273237 RL |
1077 | break; |
1078 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
4a42e264 SL |
1079 | set_params = 0; |
1080 | params[0] = | |
1081 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1c3ace68 | 1082 | ptr, sz); |
4a42e264 SL |
1083 | break; |
1084 | ||
13273237 RL |
1085 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
1086 | case EVP_CTRL_INIT: /* TODO(3.0) Purely legacy, no provider counterpart */ | |
459b15d4 | 1087 | default: |
e870791a | 1088 | return EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 SL |
1089 | case EVP_CTRL_GET_IV: |
1090 | set_params = 0; | |
1091 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, | |
1c3ace68 | 1092 | ptr, sz); |
459b15d4 SL |
1093 | break; |
1094 | case EVP_CTRL_AEAD_SET_IVLEN: | |
1095 | if (arg < 0) | |
1096 | return 0; | |
1c3ace68 | 1097 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
13273237 | 1098 | break; |
459b15d4 SL |
1099 | case EVP_CTRL_GCM_SET_IV_FIXED: |
1100 | params[0] = | |
1101 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, | |
1c3ace68 | 1102 | ptr, sz); |
459b15d4 SL |
1103 | break; |
1104 | case EVP_CTRL_AEAD_GET_TAG: | |
1c3ace68 SL |
1105 | set_params = 0; /* Fall thru */ |
1106 | case EVP_CTRL_AEAD_SET_TAG: | |
459b15d4 | 1107 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
1c3ace68 | 1108 | ptr, sz); |
459b15d4 SL |
1109 | break; |
1110 | case EVP_CTRL_AEAD_TLS1_AAD: | |
1111 | /* This one does a set and a get - since it returns a padding size */ | |
1112 | params[0] = | |
1113 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1c3ace68 | 1114 | ptr, sz); |
459b15d4 SL |
1115 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1116 | if (ret <= 0) | |
1117 | return ret; | |
1118 | params[0] = | |
1119 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1120 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1121 | if (ret <= 0) | |
1122 | return 0; | |
1123 | return sz; | |
13273237 | 1124 | } |
459b15d4 SL |
1125 | |
1126 | if (set_params) | |
1127 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1128 | else | |
1129 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
13273237 RL |
1130 | return ret; |
1131 | ||
459b15d4 SL |
1132 | /* TODO(3.0): Remove legacy code below */ |
1133 | legacy: | |
1134 | if (ctx->cipher->ctrl == NULL) { | |
0f113f3e MC |
1135 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
e870791a | 1140 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
0f113f3e MC |
1141 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, |
1142 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
1143 | return 0; | |
1144 | } | |
1145 | return ret; | |
49528751 | 1146 | } |
216659eb | 1147 | |
ae3ff60e RL |
1148 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
1149 | { | |
1150 | if (cipher != NULL && cipher->get_params != NULL) | |
1151 | return cipher->get_params(params); | |
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1156 | { | |
92d9d0ae RL |
1157 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) |
1158 | return ctx->cipher->set_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1159 | return 0; |
1160 | } | |
1161 | ||
1162 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1163 | { | |
92d9d0ae RL |
1164 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
1165 | return ctx->cipher->get_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1166 | return 0; |
1167 | } | |
1168 | ||
1169 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1170 | { | |
1171 | if (cipher != NULL && cipher->gettable_params != NULL) | |
1172 | return cipher->gettable_params(); | |
1173 | return NULL; | |
1174 | } | |
1175 | ||
1176 | const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(const EVP_CIPHER *cipher) | |
1177 | { | |
1178 | if (cipher != NULL && cipher->settable_ctx_params != NULL) | |
1179 | return cipher->settable_ctx_params(); | |
1180 | return NULL; | |
1181 | } | |
1182 | ||
1183 | const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(const EVP_CIPHER *cipher) | |
1184 | { | |
1185 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) | |
1186 | return cipher->gettable_ctx_params(); | |
1187 | return NULL; | |
1188 | } | |
1189 | ||
216659eb | 1190 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e MC |
1191 | { |
1192 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1193 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4a42e264 SL |
1194 | |
1195 | #ifdef FIPS_MODE | |
1196 | return 0; | |
1197 | #else | |
1198 | { | |
1199 | int kl; | |
1200 | ||
1201 | kl = EVP_CIPHER_CTX_key_length(ctx); | |
1202 | if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0) | |
1203 | return 0; | |
1204 | return 1; | |
1205 | } | |
1206 | #endif /* FIPS_MODE */ | |
0f113f3e | 1207 | } |
216659eb | 1208 | |
c2bf7208 | 1209 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1210 | { |
1211 | if ((in == NULL) || (in->cipher == NULL)) { | |
1212 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
1213 | return 0; | |
1214 | } | |
df05f2ce MC |
1215 | |
1216 | if (in->cipher->prov == NULL) | |
1217 | goto legacy; | |
1218 | ||
1219 | if (in->cipher->dupctx == NULL) { | |
1220 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | EVP_CIPHER_CTX_reset(out); | |
1225 | ||
1226 | *out = *in; | |
1227 | out->provctx = NULL; | |
1228 | ||
70c35fd1 | 1229 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1230 | out->fetched_cipher = NULL; |
1231 | return 0; | |
1232 | } | |
1233 | ||
1234 | out->provctx = in->cipher->dupctx(in->provctx); | |
1235 | if (out->provctx == NULL) { | |
1236 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | return 1; | |
1241 | ||
1242 | /* TODO(3.0): Remove legacy code below */ | |
1243 | legacy: | |
1244 | ||
319e518a | 1245 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e MC |
1246 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1247 | if (in->engine && !ENGINE_init(in->engine)) { | |
1248 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
1249 | return 0; | |
1250 | } | |
c2bf7208 DSH |
1251 | #endif |
1252 | ||
c0ca39bd | 1253 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1254 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1255 | |
1256 | if (in->cipher_data && in->cipher->ctx_size) { | |
1257 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1258 | if (out->cipher_data == NULL) { |
273a0218 | 1259 | out->cipher = NULL; |
0f113f3e MC |
1260 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); |
1261 | return 0; | |
1262 | } | |
1263 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1264 | } | |
1265 | ||
1266 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1267 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1268 | out->cipher = NULL; | |
1269 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
1270 | return 0; | |
1271 | } | |
0f113f3e MC |
1272 | return 1; |
1273 | } | |
df05f2ce | 1274 | |
550f974a RL |
1275 | EVP_CIPHER *evp_cipher_new(void) |
1276 | { | |
1277 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1278 | ||
1279 | if (cipher != NULL) { | |
1280 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1281 | if (cipher->lock == NULL) { | |
1282 | OPENSSL_free(cipher); | |
1283 | return NULL; | |
1284 | } | |
1285 | cipher->refcnt = 1; | |
1286 | } | |
1287 | return cipher; | |
1288 | } | |
1289 | ||
f7c16d48 | 1290 | static void *evp_cipher_from_dispatch(const int name_id, |
6b9e3724 | 1291 | const OSSL_DISPATCH *fns, |
3ca9d210 RL |
1292 | OSSL_PROVIDER *prov, |
1293 | void *unused) | |
df05f2ce MC |
1294 | { |
1295 | EVP_CIPHER *cipher = NULL; | |
1296 | int fnciphcnt = 0, fnctxcnt = 0; | |
1297 | ||
f7c16d48 | 1298 | if ((cipher = evp_cipher_new()) == NULL) { |
6b9e3724 | 1299 | EVPerr(0, ERR_R_MALLOC_FAILURE); |
df05f2ce | 1300 | return NULL; |
6b9e3724 | 1301 | } |
f7c16d48 | 1302 | cipher->name_id = name_id; |
df05f2ce | 1303 | |
ed71e917 | 1304 | #ifndef FIPS_MODE |
f7c16d48 RL |
1305 | { |
1306 | /* | |
1307 | * FIPS module note: since internal fetches will be entirely | |
1308 | * provider based, we know that none of its code depends on legacy | |
1309 | * NIDs or any functionality that use them. | |
1310 | * | |
1311 | * TODO(3.x) get rid of the need for legacy NIDs | |
1312 | */ | |
1313 | cipher->nid = OBJ_sn2nid(evp_first_name(prov, name_id)); | |
1314 | } | |
ed71e917 MC |
1315 | #endif |
1316 | ||
df05f2ce MC |
1317 | for (; fns->function_id != 0; fns++) { |
1318 | switch (fns->function_id) { | |
1319 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1320 | if (cipher->newctx != NULL) | |
1321 | break; | |
1322 | cipher->newctx = OSSL_get_OP_cipher_newctx(fns); | |
1323 | fnctxcnt++; | |
1324 | break; | |
1325 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1326 | if (cipher->einit != NULL) | |
1327 | break; | |
1328 | cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns); | |
1329 | fnciphcnt++; | |
1330 | break; | |
1331 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1332 | if (cipher->dinit != NULL) | |
1333 | break; | |
1334 | cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns); | |
1335 | fnciphcnt++; | |
1336 | break; | |
1337 | case OSSL_FUNC_CIPHER_UPDATE: | |
1338 | if (cipher->cupdate != NULL) | |
1339 | break; | |
1340 | cipher->cupdate = OSSL_get_OP_cipher_update(fns); | |
1341 | fnciphcnt++; | |
1342 | break; | |
1343 | case OSSL_FUNC_CIPHER_FINAL: | |
1344 | if (cipher->cfinal != NULL) | |
1345 | break; | |
1346 | cipher->cfinal = OSSL_get_OP_cipher_final(fns); | |
1347 | fnciphcnt++; | |
1348 | break; | |
718b133a MC |
1349 | case OSSL_FUNC_CIPHER_CIPHER: |
1350 | if (cipher->ccipher != NULL) | |
1351 | break; | |
1352 | cipher->ccipher = OSSL_get_OP_cipher_cipher(fns); | |
1353 | break; | |
df05f2ce MC |
1354 | case OSSL_FUNC_CIPHER_FREECTX: |
1355 | if (cipher->freectx != NULL) | |
1356 | break; | |
1357 | cipher->freectx = OSSL_get_OP_cipher_freectx(fns); | |
1358 | fnctxcnt++; | |
1359 | break; | |
1360 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1361 | if (cipher->dupctx != NULL) | |
1362 | break; | |
1363 | cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns); | |
1364 | break; | |
df05f2ce MC |
1365 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1366 | if (cipher->get_params != NULL) | |
1367 | break; | |
1368 | cipher->get_params = OSSL_get_OP_cipher_get_params(fns); | |
1369 | break; | |
92d9d0ae RL |
1370 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
1371 | if (cipher->get_ctx_params != NULL) | |
718b133a | 1372 | break; |
92d9d0ae | 1373 | cipher->get_ctx_params = OSSL_get_OP_cipher_get_ctx_params(fns); |
718b133a | 1374 | break; |
92d9d0ae RL |
1375 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
1376 | if (cipher->set_ctx_params != NULL) | |
df05f2ce | 1377 | break; |
92d9d0ae | 1378 | cipher->set_ctx_params = OSSL_get_OP_cipher_set_ctx_params(fns); |
df05f2ce | 1379 | break; |
ae3ff60e RL |
1380 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
1381 | if (cipher->gettable_params != NULL) | |
1382 | break; | |
1383 | cipher->gettable_params = OSSL_get_OP_cipher_gettable_params(fns); | |
1384 | break; | |
1385 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1386 | if (cipher->gettable_ctx_params != NULL) | |
1387 | break; | |
1388 | cipher->gettable_ctx_params = | |
1389 | OSSL_get_OP_cipher_gettable_ctx_params(fns); | |
1390 | break; | |
1391 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1392 | if (cipher->settable_ctx_params != NULL) | |
1393 | break; | |
1394 | cipher->settable_ctx_params = | |
1395 | OSSL_get_OP_cipher_settable_ctx_params(fns); | |
1396 | break; | |
df05f2ce MC |
1397 | } |
1398 | } | |
718b133a MC |
1399 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1400 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1401 | || fnctxcnt != 2) { |
df05f2ce MC |
1402 | /* |
1403 | * In order to be a consistent set of functions we must have at least | |
1404 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1405 | * functions, or a single "cipher" function. In all cases we need both |
1406 | * the "newctx" and "freectx" functions. | |
df05f2ce | 1407 | */ |
550f974a | 1408 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1409 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
1410 | return NULL; | |
1411 | } | |
1412 | cipher->prov = prov; | |
1413 | if (prov != NULL) | |
7c95390e | 1414 | ossl_provider_up_ref(prov); |
df05f2ce MC |
1415 | |
1416 | return cipher; | |
1417 | } | |
1418 | ||
70c35fd1 | 1419 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1420 | { |
70c35fd1 | 1421 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1422 | } |
1423 | ||
1424 | static void evp_cipher_free(void *cipher) | |
1425 | { | |
550f974a | 1426 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1427 | } |
1428 | ||
df05f2ce MC |
1429 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, |
1430 | const char *properties) | |
1431 | { | |
0211740f RL |
1432 | EVP_CIPHER *cipher = |
1433 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
3ca9d210 | 1434 | evp_cipher_from_dispatch, NULL, evp_cipher_up_ref, |
0211740f RL |
1435 | evp_cipher_free); |
1436 | ||
0211740f | 1437 | return cipher; |
df05f2ce | 1438 | } |
c540f00f | 1439 | |
550f974a RL |
1440 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
1441 | { | |
1442 | int ref = 0; | |
1443 | ||
1444 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
1445 | return 1; | |
1446 | } | |
1447 | ||
1448 | void EVP_CIPHER_free(EVP_CIPHER *cipher) | |
1449 | { | |
1450 | int i; | |
1451 | ||
1452 | if (cipher == NULL) | |
1453 | return; | |
1454 | ||
1455 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1456 | if (i > 0) | |
1457 | return; | |
1458 | ossl_provider_free(cipher->prov); | |
550f974a RL |
1459 | CRYPTO_THREAD_lock_free(cipher->lock); |
1460 | OPENSSL_free(cipher); | |
1461 | } | |
1462 | ||
c540f00f RL |
1463 | void EVP_CIPHER_do_all_ex(OPENSSL_CTX *libctx, |
1464 | void (*fn)(EVP_CIPHER *mac, void *arg), | |
1465 | void *arg) | |
1466 | { | |
1467 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1468 | (void (*)(void *, void *))fn, arg, | |
3ca9d210 | 1469 | evp_cipher_from_dispatch, NULL, evp_cipher_free); |
c540f00f | 1470 | } |