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