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