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62867571 | 1 | /* |
33388b44 | 2 | * Copyright 1995-2020 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> | |
25f2138b | 20 | #include "crypto/evp.h" |
df05f2ce | 21 | #include "internal/provider.h" |
706457b7 | 22 | #include "evp_local.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) { | |
068489a2 | 145 | case NID_undef: |
aab26e6f | 146 | case NID_aes_256_ecb: |
f4a129bb MC |
147 | case NID_aes_192_ecb: |
148 | case NID_aes_128_ecb: | |
718b133a MC |
149 | case NID_aes_256_cbc: |
150 | case NID_aes_192_cbc: | |
151 | case NID_aes_128_cbc: | |
ed98df51 MC |
152 | case NID_aes_256_ofb128: |
153 | case NID_aes_192_ofb128: | |
154 | case NID_aes_128_ofb128: | |
75dd6d64 MC |
155 | case NID_aes_256_cfb128: |
156 | case NID_aes_192_cfb128: | |
157 | case NID_aes_128_cfb128: | |
158 | case NID_aes_256_cfb1: | |
159 | case NID_aes_192_cfb1: | |
160 | case NID_aes_128_cfb1: | |
161 | case NID_aes_256_cfb8: | |
162 | case NID_aes_192_cfb8: | |
163 | case NID_aes_128_cfb8: | |
819a7ae9 MC |
164 | case NID_aes_256_ctr: |
165 | case NID_aes_192_ctr: | |
166 | case NID_aes_128_ctr: | |
3a9f26f3 SL |
167 | case NID_aes_128_xts: |
168 | case NID_aes_256_xts: | |
3837c202 SL |
169 | case NID_aes_256_ocb: |
170 | case NID_aes_192_ocb: | |
171 | case NID_aes_128_ocb: | |
a672a02a SL |
172 | case NID_aes_256_gcm: |
173 | case NID_aes_192_gcm: | |
174 | case NID_aes_128_gcm: | |
eb173822 SL |
175 | case NID_aes_256_siv: |
176 | case NID_aes_192_siv: | |
177 | case NID_aes_128_siv: | |
0d2bfe52 SL |
178 | case NID_aes_256_cbc_hmac_sha256: |
179 | case NID_aes_128_cbc_hmac_sha256: | |
180 | case NID_aes_256_cbc_hmac_sha1: | |
181 | case NID_aes_128_cbc_hmac_sha1: | |
ca392b29 SL |
182 | case NID_id_aes256_wrap: |
183 | case NID_id_aes256_wrap_pad: | |
184 | case NID_id_aes192_wrap: | |
185 | case NID_id_aes192_wrap_pad: | |
186 | case NID_id_aes128_wrap: | |
187 | case NID_id_aes128_wrap_pad: | |
a672a02a SL |
188 | case NID_aria_256_gcm: |
189 | case NID_aria_192_gcm: | |
190 | case NID_aria_128_gcm: | |
3bfe9005 SL |
191 | case NID_aes_256_ccm: |
192 | case NID_aes_192_ccm: | |
193 | case NID_aes_128_ccm: | |
194 | case NID_aria_256_ccm: | |
195 | case NID_aria_192_ccm: | |
196 | case NID_aria_128_ccm: | |
e1178600 SL |
197 | case NID_aria_256_ecb: |
198 | case NID_aria_192_ecb: | |
199 | case NID_aria_128_ecb: | |
200 | case NID_aria_256_cbc: | |
201 | case NID_aria_192_cbc: | |
202 | case NID_aria_128_cbc: | |
203 | case NID_aria_256_ofb128: | |
204 | case NID_aria_192_ofb128: | |
205 | case NID_aria_128_ofb128: | |
206 | case NID_aria_256_cfb128: | |
207 | case NID_aria_192_cfb128: | |
208 | case NID_aria_128_cfb128: | |
209 | case NID_aria_256_cfb1: | |
210 | case NID_aria_192_cfb1: | |
211 | case NID_aria_128_cfb1: | |
212 | case NID_aria_256_cfb8: | |
213 | case NID_aria_192_cfb8: | |
214 | case NID_aria_128_cfb8: | |
215 | case NID_aria_256_ctr: | |
216 | case NID_aria_192_ctr: | |
217 | case NID_aria_128_ctr: | |
218 | case NID_camellia_256_ecb: | |
219 | case NID_camellia_192_ecb: | |
220 | case NID_camellia_128_ecb: | |
221 | case NID_camellia_256_cbc: | |
222 | case NID_camellia_192_cbc: | |
223 | case NID_camellia_128_cbc: | |
224 | case NID_camellia_256_ofb128: | |
225 | case NID_camellia_192_ofb128: | |
226 | case NID_camellia_128_ofb128: | |
227 | case NID_camellia_256_cfb128: | |
228 | case NID_camellia_192_cfb128: | |
229 | case NID_camellia_128_cfb128: | |
230 | case NID_camellia_256_cfb1: | |
231 | case NID_camellia_192_cfb1: | |
232 | case NID_camellia_128_cfb1: | |
233 | case NID_camellia_256_cfb8: | |
234 | case NID_camellia_192_cfb8: | |
235 | case NID_camellia_128_cfb8: | |
236 | case NID_camellia_256_ctr: | |
237 | case NID_camellia_192_ctr: | |
238 | case NID_camellia_128_ctr: | |
4a42e264 SL |
239 | case NID_des_ede3_cbc: |
240 | case NID_des_ede3_ecb: | |
241 | case NID_des_ede3_ofb64: | |
242 | case NID_des_ede3_cfb64: | |
243 | case NID_des_ede3_cfb8: | |
244 | case NID_des_ede3_cfb1: | |
245 | case NID_des_ede_cbc: | |
246 | case NID_des_ede_ecb: | |
247 | case NID_des_ede_ofb64: | |
248 | case NID_des_ede_cfb64: | |
249 | case NID_desx_cbc: | |
e3f3ee44 SL |
250 | case NID_des_cbc: |
251 | case NID_des_ecb: | |
252 | case NID_des_cfb1: | |
253 | case NID_des_cfb8: | |
254 | case NID_des_cfb64: | |
255 | case NID_des_ofb64: | |
4a42e264 | 256 | case NID_id_smime_alg_CMS3DESwrap: |
55c7dc79 SL |
257 | case NID_bf_cbc: |
258 | case NID_bf_ecb: | |
259 | case NID_bf_cfb64: | |
260 | case NID_bf_ofb64: | |
f22431f2 SL |
261 | case NID_idea_cbc: |
262 | case NID_idea_ecb: | |
263 | case NID_idea_cfb64: | |
264 | case NID_idea_ofb64: | |
18b00427 SL |
265 | case NID_cast5_cbc: |
266 | case NID_cast5_ecb: | |
267 | case NID_cast5_cfb64: | |
268 | case NID_cast5_ofb64: | |
70adc646 SL |
269 | case NID_seed_cbc: |
270 | case NID_seed_ecb: | |
271 | case NID_seed_cfb128: | |
272 | case NID_seed_ofb128: | |
105dde25 SL |
273 | case NID_sm4_cbc: |
274 | case NID_sm4_ecb: | |
275 | case NID_sm4_ctr: | |
276 | case NID_sm4_cfb128: | |
277 | case NID_sm4_ofb128: | |
bafde183 SL |
278 | case NID_rc4: |
279 | case NID_rc4_40: | |
6a41156c SL |
280 | case NID_rc5_cbc: |
281 | case NID_rc5_ecb: | |
282 | case NID_rc5_cfb64: | |
283 | case NID_rc5_ofb64: | |
f816aa47 SL |
284 | case NID_rc2_cbc: |
285 | case NID_rc2_40_cbc: | |
286 | case NID_rc2_64_cbc: | |
287 | case NID_rc2_cfb64: | |
288 | case NID_rc2_ofb64: | |
3d5a7578 SL |
289 | case NID_chacha20: |
290 | case NID_chacha20_poly1305: | |
8fece335 | 291 | case NID_rc4_hmac_md5: |
6a41156c | 292 | break; |
df05f2ce MC |
293 | default: |
294 | goto legacy; | |
295 | } | |
296 | } | |
297 | ||
298 | /* | |
299 | * Ensure a context left lying around from last time is cleared | |
300 | * (legacy code) | |
301 | */ | |
302 | if (cipher != NULL && ctx->cipher != NULL) { | |
303 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
304 | ctx->cipher_data = NULL; | |
305 | } | |
306 | ||
307 | ||
308 | /* TODO(3.0): Start of non-legacy code below */ | |
309 | ||
310 | /* Ensure a context left lying around from last time is cleared */ | |
311 | if (cipher != NULL && ctx->cipher != NULL) { | |
312 | unsigned long flags = ctx->flags; | |
313 | ||
314 | EVP_CIPHER_CTX_reset(ctx); | |
315 | /* Restore encrypt and flags */ | |
316 | ctx->encrypt = enc; | |
317 | ctx->flags = flags; | |
318 | } | |
319 | ||
7f612b1f | 320 | if (cipher == NULL) |
df05f2ce MC |
321 | cipher = ctx->cipher; |
322 | ||
323 | if (cipher->prov == NULL) { | |
319e518a | 324 | #ifdef FIPS_MODE |
79c44b4e | 325 | /* We only do explicit fetches inside the FIPS module */ |
319e518a MC |
326 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
327 | return 0; | |
328 | #else | |
329 | EVP_CIPHER *provciph = | |
068489a2 MC |
330 | EVP_CIPHER_fetch(NULL, |
331 | cipher->nid == NID_undef ? "NULL" | |
332 | : OBJ_nid2sn(cipher->nid), | |
333 | ""); | |
319e518a | 334 | |
df05f2ce MC |
335 | if (provciph == NULL) { |
336 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
337 | return 0; | |
338 | } | |
339 | cipher = provciph; | |
550f974a | 340 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 341 | ctx->fetched_cipher = provciph; |
319e518a | 342 | #endif |
df05f2ce MC |
343 | } |
344 | ||
345 | ctx->cipher = cipher; | |
346 | if (ctx->provctx == NULL) { | |
a39eb840 | 347 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
df05f2ce MC |
348 | if (ctx->provctx == NULL) { |
349 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
350 | return 0; | |
351 | } | |
352 | } | |
353 | ||
354 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 355 | /* |
df05f2ce MC |
356 | * If this ctx was already set up for no padding then we need to tell |
357 | * the new cipher about it. | |
358 | */ | |
359 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
360 | return 0; | |
361 | } | |
362 | ||
363 | if (enc) { | |
364 | if (ctx->cipher->einit == NULL) { | |
365 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
366 | return 0; | |
367 | } | |
368 | ||
344cfa34 MC |
369 | return ctx->cipher->einit(ctx->provctx, |
370 | key, | |
33b40a10 MC |
371 | key == NULL ? 0 |
372 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 373 | iv, |
33b40a10 MC |
374 | iv == NULL ? 0 |
375 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
376 | } |
377 | ||
378 | if (ctx->cipher->dinit == NULL) { | |
379 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
380 | return 0; | |
381 | } | |
382 | ||
344cfa34 MC |
383 | return ctx->cipher->dinit(ctx->provctx, |
384 | key, | |
33b40a10 MC |
385 | key == NULL ? 0 |
386 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 387 | iv, |
33b40a10 MC |
388 | iv == NULL ? 0 |
389 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
390 | |
391 | /* TODO(3.0): Remove legacy code below */ | |
392 | legacy: | |
393 | ||
394 | if (cipher != NULL) { | |
395 | /* | |
396 | * Ensure a context left lying around from last time is cleared (we | |
397 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
398 | * EVP_CIPHER could be used). |
399 | */ | |
400 | if (ctx->cipher) { | |
401 | unsigned long flags = ctx->flags; | |
c0ca39bd | 402 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
403 | /* Restore encrypt and flags */ |
404 | ctx->encrypt = enc; | |
405 | ctx->flags = flags; | |
406 | } | |
319e518a | 407 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
df05f2ce | 408 | if (impl != NULL) { |
0f113f3e MC |
409 | if (!ENGINE_init(impl)) { |
410 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
411 | return 0; | |
412 | } | |
df05f2ce MC |
413 | } else { |
414 | impl = tmpimpl; | |
415 | } | |
416 | if (impl != NULL) { | |
0f113f3e MC |
417 | /* There's an ENGINE for this job ... (apparently) */ |
418 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
419 | |
420 | if (c == NULL) { | |
0f113f3e MC |
421 | /* |
422 | * One positive side-effect of US's export control history, | |
423 | * is that we should at least be able to avoid using US | |
0d4fb843 | 424 | * misspellings of "initialisation"? |
0f113f3e MC |
425 | */ |
426 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
427 | return 0; | |
428 | } | |
429 | /* We'll use the ENGINE's private cipher definition */ | |
430 | cipher = c; | |
431 | /* | |
432 | * Store the ENGINE functional reference so we know 'cipher' came | |
433 | * from an ENGINE and we need to release it when done. | |
434 | */ | |
435 | ctx->engine = impl; | |
df05f2ce | 436 | } else { |
0f113f3e | 437 | ctx->engine = NULL; |
df05f2ce | 438 | } |
0b13e9f0 | 439 | #endif |
544a2aea | 440 | |
0f113f3e MC |
441 | ctx->cipher = cipher; |
442 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 443 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 444 | if (ctx->cipher_data == NULL) { |
273a0218 | 445 | ctx->cipher = NULL; |
0f113f3e MC |
446 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); |
447 | return 0; | |
448 | } | |
449 | } else { | |
450 | ctx->cipher_data = NULL; | |
451 | } | |
452 | ctx->key_len = cipher->key_len; | |
453 | /* Preserve wrap enable flag, zero everything else */ | |
454 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
455 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
456 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 457 | ctx->cipher = NULL; |
0f113f3e MC |
458 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
459 | return 0; | |
460 | } | |
461 | } | |
0f113f3e | 462 | } |
319e518a | 463 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e | 464 | skip_to_init: |
0b13e9f0 | 465 | #endif |
1702c500 P |
466 | if (ctx->cipher == NULL) |
467 | return 0; | |
468 | ||
0f113f3e MC |
469 | /* we assume block size is a power of 2 in *cryptUpdate */ |
470 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
471 | || ctx->cipher->block_size == 8 | |
472 | || ctx->cipher->block_size == 16); | |
473 | ||
474 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
475 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
476 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
477 | return 0; | |
478 | } | |
479 | ||
480d3323 | 480 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
481 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
482 | ||
483 | case EVP_CIPH_STREAM_CIPHER: | |
484 | case EVP_CIPH_ECB_MODE: | |
485 | break; | |
486 | ||
487 | case EVP_CIPH_CFB_MODE: | |
488 | case EVP_CIPH_OFB_MODE: | |
489 | ||
490 | ctx->num = 0; | |
491 | /* fall-through */ | |
492 | ||
493 | case EVP_CIPH_CBC_MODE: | |
494 | ||
495 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
496 | (int)sizeof(ctx->iv)); | |
497 | if (iv) | |
498 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
499 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
500 | break; | |
501 | ||
502 | case EVP_CIPH_CTR_MODE: | |
503 | ctx->num = 0; | |
504 | /* Don't reuse IV for CTR mode */ | |
505 | if (iv) | |
506 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
507 | break; | |
508 | ||
509 | default: | |
510 | return 0; | |
0f113f3e MC |
511 | } |
512 | } | |
513 | ||
514 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
515 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
516 | return 0; | |
517 | } | |
518 | ctx->buf_len = 0; | |
519 | ctx->final_used = 0; | |
520 | ctx->block_mask = ctx->cipher->block_size - 1; | |
521 | return 1; | |
522 | } | |
d02b48c6 | 523 | |
be06a934 | 524 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
525 | const unsigned char *in, int inl) |
526 | { | |
527 | if (ctx->encrypt) | |
528 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
529 | else | |
530 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
531 | } | |
d02b48c6 | 532 | |
581f1c84 | 533 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
534 | { |
535 | if (ctx->encrypt) | |
536 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
537 | else | |
538 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
539 | } | |
581f1c84 | 540 | |
6b691a5c | 541 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
542 | { |
543 | if (ctx->encrypt) | |
544 | return EVP_EncryptFinal(ctx, out, outl); | |
545 | else | |
546 | return EVP_DecryptFinal(ctx, out, outl); | |
547 | } | |
d02b48c6 | 548 | |
be06a934 | 549 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
550 | const unsigned char *key, const unsigned char *iv) |
551 | { | |
552 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
553 | } | |
18eda732 | 554 | |
0f113f3e MC |
555 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
556 | ENGINE *impl, const unsigned char *key, | |
557 | const unsigned char *iv) | |
558 | { | |
559 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
560 | } | |
d02b48c6 | 561 | |
be06a934 | 562 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
563 | const unsigned char *key, const unsigned char *iv) |
564 | { | |
565 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
566 | } | |
18eda732 | 567 | |
0f113f3e MC |
568 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
569 | ENGINE *impl, const unsigned char *key, | |
570 | const unsigned char *iv) | |
571 | { | |
572 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
573 | } | |
d02b48c6 | 574 | |
c3a73daf AP |
575 | /* |
576 | * According to the letter of standard difference between pointers | |
577 | * is specified to be valid only within same object. This makes | |
578 | * it formally challenging to determine if input and output buffers | |
579 | * are not partially overlapping with standard pointer arithmetic. | |
580 | */ | |
581 | #ifdef PTRDIFF_T | |
582 | # undef PTRDIFF_T | |
583 | #endif | |
584 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
585 | /* | |
586 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
587 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
588 | * difference between two pointers might be truncated to 32 bits. | |
589 | * In the context one can even wonder how comparison for | |
590 | * equality is implemented. To be on the safe side we adhere to | |
591 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
592 | */ |
593 | # define PTRDIFF_T uint64_t | |
594 | #else | |
595 | # define PTRDIFF_T size_t | |
596 | #endif | |
597 | ||
7141ba31 | 598 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
599 | { |
600 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
601 | /* | |
602 | * Check for partially overlapping buffers. [Binary logical | |
603 | * operations are used instead of boolean to minimize number | |
604 | * of conditional branches.] | |
605 | */ | |
83151b73 AP |
606 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
607 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 608 | |
83151b73 | 609 | return overlapped; |
c3a73daf AP |
610 | } |
611 | ||
a8bf2f8f RL |
612 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
613 | unsigned char *out, int *outl, | |
614 | const unsigned char *in, int inl) | |
0f113f3e | 615 | { |
64846096 LP |
616 | int i, j, bl, cmpl = inl; |
617 | ||
618 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
619 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 620 | |
7141ba31 MC |
621 | bl = ctx->cipher->block_size; |
622 | ||
0f113f3e | 623 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 624 | /* If block size > 1 then the cipher will have to do this check */ |
64846096 | 625 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { |
a8bf2f8f | 626 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 627 | return 0; |
83151b73 | 628 | } |
5fc77684 | 629 | |
0f113f3e MC |
630 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
631 | if (i < 0) | |
632 | return 0; | |
633 | else | |
634 | *outl = i; | |
635 | return 1; | |
636 | } | |
637 | ||
2c236894 MC |
638 | if (inl <= 0) { |
639 | *outl = 0; | |
640 | return inl == 0; | |
641 | } | |
64846096 | 642 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
a8bf2f8f | 643 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 644 | return 0; |
83151b73 | 645 | } |
0f113f3e MC |
646 | |
647 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
648 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
649 | *outl = inl; | |
650 | return 1; | |
651 | } else { | |
652 | *outl = 0; | |
653 | return 0; | |
654 | } | |
655 | } | |
656 | i = ctx->buf_len; | |
0f113f3e MC |
657 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
658 | if (i != 0) { | |
3f358213 | 659 | if (bl - i > inl) { |
0f113f3e MC |
660 | memcpy(&(ctx->buf[i]), in, inl); |
661 | ctx->buf_len += inl; | |
662 | *outl = 0; | |
663 | return 1; | |
664 | } else { | |
665 | j = bl - i; | |
666 | memcpy(&(ctx->buf[i]), in, j); | |
0f113f3e MC |
667 | inl -= j; |
668 | in += j; | |
5fc77684 AP |
669 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
670 | return 0; | |
0f113f3e MC |
671 | out += bl; |
672 | *outl = bl; | |
673 | } | |
674 | } else | |
675 | *outl = 0; | |
676 | i = inl & (bl - 1); | |
677 | inl -= i; | |
678 | if (inl > 0) { | |
679 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
680 | return 0; | |
681 | *outl += inl; | |
682 | } | |
683 | ||
684 | if (i != 0) | |
685 | memcpy(ctx->buf, &(in[inl]), i); | |
686 | ctx->buf_len = i; | |
687 | return 1; | |
688 | } | |
d02b48c6 | 689 | |
a8bf2f8f RL |
690 | |
691 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
692 | const unsigned char *in, int inl) | |
693 | { | |
df05f2ce MC |
694 | int ret; |
695 | size_t soutl; | |
3b94944c | 696 | int blocksize; |
df05f2ce | 697 | |
a8bf2f8f RL |
698 | /* Prevent accidental use of decryption context when encrypting */ |
699 | if (!ctx->encrypt) { | |
700 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
701 | return 0; | |
702 | } | |
703 | ||
d4d89a07 SS |
704 | if (ctx->cipher == NULL) { |
705 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
706 | return 0; | |
707 | } | |
708 | ||
709 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
710 | goto legacy; |
711 | ||
3b94944c MC |
712 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
713 | ||
714 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
715 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); |
716 | return 0; | |
717 | } | |
3b94944c MC |
718 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
719 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
720 | (size_t)inl); | |
df05f2ce | 721 | |
36e619d7 GV |
722 | if (ret) { |
723 | if (soutl > INT_MAX) { | |
724 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
725 | return 0; | |
726 | } | |
727 | *outl = soutl; | |
df05f2ce | 728 | } |
36e619d7 | 729 | |
df05f2ce MC |
730 | return ret; |
731 | ||
732 | /* TODO(3.0): Remove legacy code below */ | |
733 | legacy: | |
734 | ||
a8bf2f8f RL |
735 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
736 | } | |
737 | ||
be06a934 | 738 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
739 | { |
740 | int ret; | |
741 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
742 | return ret; | |
743 | } | |
581f1c84 DSH |
744 | |
745 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
746 | { |
747 | int n, ret; | |
748 | unsigned int i, b, bl; | |
df05f2ce | 749 | size_t soutl; |
3b94944c | 750 | int blocksize; |
0f113f3e | 751 | |
a8bf2f8f RL |
752 | /* Prevent accidental use of decryption context when encrypting */ |
753 | if (!ctx->encrypt) { | |
754 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
755 | return 0; | |
756 | } | |
757 | ||
4894dcad P |
758 | if (ctx->cipher == NULL) { |
759 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
760 | return 0; | |
761 | } | |
762 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
763 | goto legacy; |
764 | ||
3b94944c MC |
765 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
766 | ||
767 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
768 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
769 | return 0; | |
770 | } | |
771 | ||
3b94944c MC |
772 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
773 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce | 774 | |
36e619d7 GV |
775 | if (ret) { |
776 | if (soutl > INT_MAX) { | |
777 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
778 | return 0; | |
779 | } | |
780 | *outl = soutl; | |
df05f2ce | 781 | } |
df05f2ce MC |
782 | |
783 | return ret; | |
784 | ||
785 | /* TODO(3.0): Remove legacy code below */ | |
786 | legacy: | |
787 | ||
0f113f3e MC |
788 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
789 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
790 | if (ret < 0) | |
791 | return 0; | |
792 | else | |
793 | *outl = ret; | |
794 | return 1; | |
795 | } | |
796 | ||
797 | b = ctx->cipher->block_size; | |
cbe29648 | 798 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
799 | if (b == 1) { |
800 | *outl = 0; | |
801 | return 1; | |
802 | } | |
803 | bl = ctx->buf_len; | |
804 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
805 | if (bl) { | |
806 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
807 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
808 | return 0; | |
809 | } | |
810 | *outl = 0; | |
811 | return 1; | |
812 | } | |
813 | ||
814 | n = b - bl; | |
815 | for (i = bl; i < b; i++) | |
816 | ctx->buf[i] = n; | |
817 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
818 | ||
819 | if (ret) | |
820 | *outl = b; | |
821 | ||
822 | return ret; | |
823 | } | |
d02b48c6 | 824 | |
be06a934 | 825 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
826 | const unsigned char *in, int inl) |
827 | { | |
df05f2ce | 828 | int fix_len, cmpl = inl, ret; |
0f113f3e | 829 | unsigned int b; |
df05f2ce | 830 | size_t soutl; |
3b94944c | 831 | int blocksize; |
0f113f3e | 832 | |
a8bf2f8f RL |
833 | /* Prevent accidental use of encryption context when decrypting */ |
834 | if (ctx->encrypt) { | |
835 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
836 | return 0; | |
837 | } | |
838 | ||
d2c2e49e P |
839 | if (ctx->cipher == NULL) { |
840 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
841 | return 0; | |
842 | } | |
843 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
844 | goto legacy; |
845 | ||
3b94944c MC |
846 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
847 | ||
848 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
849 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); |
850 | return 0; | |
851 | } | |
3b94944c MC |
852 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
853 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
854 | (size_t)inl); | |
df05f2ce MC |
855 | |
856 | if (ret) { | |
857 | if (soutl > INT_MAX) { | |
858 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
859 | return 0; | |
860 | } | |
861 | *outl = soutl; | |
862 | } | |
863 | ||
864 | return ret; | |
865 | ||
866 | /* TODO(3.0): Remove legacy code below */ | |
867 | legacy: | |
868 | ||
7141ba31 MC |
869 | b = ctx->cipher->block_size; |
870 | ||
64846096 LP |
871 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
872 | cmpl = (cmpl + 7) / 8; | |
873 | ||
0f113f3e | 874 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
64846096 | 875 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { |
83151b73 | 876 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 877 | return 0; |
83151b73 | 878 | } |
5fc77684 | 879 | |
0f113f3e MC |
880 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
881 | if (fix_len < 0) { | |
882 | *outl = 0; | |
883 | return 0; | |
884 | } else | |
885 | *outl = fix_len; | |
886 | return 1; | |
887 | } | |
888 | ||
2c236894 MC |
889 | if (inl <= 0) { |
890 | *outl = 0; | |
891 | return inl == 0; | |
892 | } | |
893 | ||
0f113f3e | 894 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 895 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 896 | |
cbe29648 | 897 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
898 | |
899 | if (ctx->final_used) { | |
5fc77684 AP |
900 | /* see comment about PTRDIFF_T comparison above */ |
901 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
83151b73 AP |
902 | || is_partially_overlapping(out, in, b)) { |
903 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
5fc77684 | 904 | return 0; |
83151b73 | 905 | } |
0f113f3e MC |
906 | memcpy(out, ctx->final, b); |
907 | out += b; | |
908 | fix_len = 1; | |
909 | } else | |
910 | fix_len = 0; | |
911 | ||
a8bf2f8f | 912 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
913 | return 0; |
914 | ||
915 | /* | |
916 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
917 | * copy of this last block | |
918 | */ | |
919 | if (b > 1 && !ctx->buf_len) { | |
920 | *outl -= b; | |
921 | ctx->final_used = 1; | |
922 | memcpy(ctx->final, &out[*outl], b); | |
923 | } else | |
924 | ctx->final_used = 0; | |
925 | ||
926 | if (fix_len) | |
927 | *outl += b; | |
928 | ||
929 | return 1; | |
930 | } | |
d02b48c6 | 931 | |
6b691a5c | 932 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
933 | { |
934 | int ret; | |
935 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
936 | return ret; | |
937 | } | |
581f1c84 DSH |
938 | |
939 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
940 | { |
941 | int i, n; | |
942 | unsigned int b; | |
df05f2ce MC |
943 | size_t soutl; |
944 | int ret; | |
3b94944c | 945 | int blocksize; |
a8bf2f8f RL |
946 | |
947 | /* Prevent accidental use of encryption context when decrypting */ | |
948 | if (ctx->encrypt) { | |
949 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
950 | return 0; | |
951 | } | |
952 | ||
d4d89a07 SS |
953 | if (ctx->cipher == NULL) { |
954 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
955 | return 0; | |
956 | } | |
957 | ||
958 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
959 | goto legacy; |
960 | ||
3b94944c MC |
961 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
962 | ||
963 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
964 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
965 | return 0; | |
966 | } | |
967 | ||
3b94944c MC |
968 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
969 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
970 | |
971 | if (ret) { | |
972 | if (soutl > INT_MAX) { | |
973 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
974 | return 0; | |
975 | } | |
976 | *outl = soutl; | |
977 | } | |
978 | ||
979 | return ret; | |
980 | ||
981 | /* TODO(3.0): Remove legacy code below */ | |
982 | legacy: | |
983 | ||
0f113f3e | 984 | *outl = 0; |
0f113f3e MC |
985 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
986 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
987 | if (i < 0) | |
988 | return 0; | |
989 | else | |
990 | *outl = i; | |
991 | return 1; | |
992 | } | |
993 | ||
994 | b = ctx->cipher->block_size; | |
995 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
996 | if (ctx->buf_len) { | |
997 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
998 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
999 | return 0; | |
1000 | } | |
1001 | *outl = 0; | |
1002 | return 1; | |
1003 | } | |
1004 | if (b > 1) { | |
1005 | if (ctx->buf_len || !ctx->final_used) { | |
1006 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
26a7d938 | 1007 | return 0; |
0f113f3e | 1008 | } |
cbe29648 | 1009 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
1010 | |
1011 | /* | |
1012 | * The following assumes that the ciphertext has been authenticated. | |
1013 | * Otherwise it provides a padding oracle. | |
1014 | */ | |
1015 | n = ctx->final[b - 1]; | |
1016 | if (n == 0 || n > (int)b) { | |
1017 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 1018 | return 0; |
0f113f3e MC |
1019 | } |
1020 | for (i = 0; i < n; i++) { | |
1021 | if (ctx->final[--b] != n) { | |
1022 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 1023 | return 0; |
0f113f3e MC |
1024 | } |
1025 | } | |
1026 | n = ctx->cipher->block_size - n; | |
1027 | for (i = 0; i < n; i++) | |
1028 | out[i] = ctx->final[i]; | |
1029 | *outl = n; | |
1030 | } else | |
1031 | *outl = 0; | |
208fb891 | 1032 | return 1; |
0f113f3e | 1033 | } |
d02b48c6 | 1034 | |
6343829a | 1035 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 1036 | { |
d23adad1 MC |
1037 | if (c->cipher->prov != NULL) { |
1038 | int ok; | |
1039 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
1040 | size_t len = keylen; | |
459b15d4 | 1041 | |
d23adad1 MC |
1042 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
1043 | return 1; | |
1044 | ||
1045 | /* Check the cipher actually understands this parameter */ | |
1046 | if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher), | |
1047 | OSSL_CIPHER_PARAM_KEYLEN) == NULL) | |
1048 | return 0; | |
1049 | ||
1050 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); | |
1051 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params); | |
13273237 | 1052 | |
d23adad1 MC |
1053 | return ok > 0 ? 1 : 0; |
1054 | } | |
13273237 RL |
1055 | |
1056 | /* TODO(3.0) legacy code follows */ | |
d23adad1 MC |
1057 | |
1058 | /* | |
1059 | * Note there have never been any built-in ciphers that define this flag | |
1060 | * since it was first introduced. | |
1061 | */ | |
0f113f3e MC |
1062 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
1063 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 1064 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
1065 | return 1; |
1066 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
1067 | c->key_len = keylen; | |
1068 | return 1; | |
1069 | } | |
1070 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
1071 | return 0; | |
1072 | } | |
49528751 | 1073 | |
f2e5ca84 | 1074 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 1075 | { |
13273237 | 1076 | int ok; |
459b15d4 | 1077 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
1c3ace68 | 1078 | unsigned int pd = pad; |
13273237 | 1079 | |
0f113f3e MC |
1080 | if (pad) |
1081 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
1082 | else | |
1083 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 1084 | |
1c3ace68 | 1085 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
459b15d4 SL |
1086 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1087 | ||
13273237 | 1088 | return ok != 0; |
0f113f3e | 1089 | } |
f2e5ca84 | 1090 | |
49528751 DSH |
1091 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
1092 | { | |
e870791a | 1093 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 | 1094 | int set_params = 1; |
1c3ace68 | 1095 | size_t sz = arg; |
6a41156c | 1096 | unsigned int i; |
0d2bfe52 SL |
1097 | OSSL_PARAM params[4] = { |
1098 | OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END | |
1099 | }; | |
d91f4568 | 1100 | |
459b15d4 | 1101 | if (ctx == NULL || ctx->cipher == NULL) { |
0f113f3e MC |
1102 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); |
1103 | return 0; | |
1104 | } | |
1105 | ||
13273237 RL |
1106 | if (ctx->cipher->prov == NULL) |
1107 | goto legacy; | |
1108 | ||
1109 | switch (type) { | |
1110 | case EVP_CTRL_SET_KEY_LENGTH: | |
1c3ace68 | 1111 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
13273237 RL |
1112 | break; |
1113 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
4a42e264 SL |
1114 | set_params = 0; |
1115 | params[0] = | |
1116 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1c3ace68 | 1117 | ptr, sz); |
4a42e264 SL |
1118 | break; |
1119 | ||
d6d74cf4 RL |
1120 | case EVP_CTRL_INIT: |
1121 | /* | |
1122 | * TODO(3.0) EVP_CTRL_INIT is purely legacy, no provider counterpart | |
1123 | * As a matter of fact, this should be dead code, but some caller | |
1124 | * might still do a direct control call with this command, so... | |
1125 | * Legacy methods return 1 except for exceptional circumstances, so | |
1126 | * we do the same here to not be disruptive. | |
1127 | */ | |
1128 | return 1; | |
13273237 | 1129 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
459b15d4 | 1130 | default: |
6a36f209 | 1131 | goto end; |
459b15d4 SL |
1132 | case EVP_CTRL_GET_IV: |
1133 | set_params = 0; | |
1134 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, | |
1c3ace68 | 1135 | ptr, sz); |
459b15d4 SL |
1136 | break; |
1137 | case EVP_CTRL_AEAD_SET_IVLEN: | |
1138 | if (arg < 0) | |
1139 | return 0; | |
1c3ace68 | 1140 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
13273237 | 1141 | break; |
11b44359 SL |
1142 | case EVP_CTRL_AEAD_SET_IV_FIXED: |
1143 | params[0] = OSSL_PARAM_construct_octet_string( | |
1144 | OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz); | |
1145 | break; | |
1146 | case EVP_CTRL_GCM_IV_GEN: | |
1147 | set_params = 0; | |
1148 | if (arg < 0) | |
1149 | sz = 0; /* special case that uses the iv length */ | |
1150 | params[0] = OSSL_PARAM_construct_octet_string( | |
1151 | OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz); | |
1152 | break; | |
1153 | case EVP_CTRL_GCM_SET_IV_INV: | |
1154 | if (arg < 0) | |
1155 | return 0; | |
1156 | params[0] = OSSL_PARAM_construct_octet_string( | |
1157 | OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz); | |
459b15d4 | 1158 | break; |
6a41156c SL |
1159 | case EVP_CTRL_GET_RC5_ROUNDS: |
1160 | set_params = 0; /* Fall thru */ | |
1161 | case EVP_CTRL_SET_RC5_ROUNDS: | |
1162 | if (arg < 0) | |
1163 | return 0; | |
1164 | i = (unsigned int)arg; | |
1165 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i); | |
1166 | break; | |
eb173822 SL |
1167 | case EVP_CTRL_SET_SPEED: |
1168 | if (arg < 0) | |
1169 | return 0; | |
1170 | i = (unsigned int)arg; | |
1171 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i); | |
1172 | break; | |
459b15d4 | 1173 | case EVP_CTRL_AEAD_GET_TAG: |
1c3ace68 SL |
1174 | set_params = 0; /* Fall thru */ |
1175 | case EVP_CTRL_AEAD_SET_TAG: | |
459b15d4 | 1176 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
1c3ace68 | 1177 | ptr, sz); |
459b15d4 SL |
1178 | break; |
1179 | case EVP_CTRL_AEAD_TLS1_AAD: | |
0d2bfe52 | 1180 | /* This one does a set and a get - since it returns a size */ |
459b15d4 SL |
1181 | params[0] = |
1182 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1c3ace68 | 1183 | ptr, sz); |
459b15d4 SL |
1184 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1185 | if (ret <= 0) | |
6a36f209 | 1186 | goto end; |
459b15d4 SL |
1187 | params[0] = |
1188 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1189 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1190 | if (ret <= 0) | |
6a36f209 | 1191 | goto end; |
459b15d4 | 1192 | return sz; |
f816aa47 SL |
1193 | #ifndef OPENSSL_NO_RC2 |
1194 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
1195 | set_params = 0; /* Fall thru */ | |
1196 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
1197 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz); | |
1198 | break; | |
1199 | #endif /* OPENSSL_NO_RC2 */ | |
0d2bfe52 SL |
1200 | #if !defined(OPENSSL_NO_MULTIBLOCK) |
1201 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE: | |
1202 | params[0] = OSSL_PARAM_construct_size_t( | |
1203 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz); | |
1204 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1205 | if (ret <= 0) | |
1206 | return 0; | |
1207 | ||
1208 | params[0] = OSSL_PARAM_construct_size_t( | |
1209 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz); | |
1210 | params[1] = OSSL_PARAM_construct_end(); | |
1211 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1212 | if (ret <= 0) | |
1213 | return 0; | |
1214 | return sz; | |
1215 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: { | |
1216 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1217 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1218 | ||
1219 | if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) | |
1220 | return 0; | |
1221 | ||
1222 | params[0] = OSSL_PARAM_construct_octet_string( | |
1223 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len); | |
1224 | params[1] = OSSL_PARAM_construct_uint( | |
1225 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1226 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1227 | if (ret <= 0) | |
1228 | return ret; | |
1229 | /* Retrieve the return values changed by the set */ | |
1230 | params[0] = OSSL_PARAM_construct_size_t( | |
1231 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz); | |
1232 | params[1] = OSSL_PARAM_construct_uint( | |
1233 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1234 | params[2] = OSSL_PARAM_construct_end(); | |
1235 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1236 | if (ret <= 0) | |
1237 | return 0; | |
1238 | return sz; | |
1239 | } | |
1240 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: { | |
1241 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1242 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1243 | ||
1244 | params[0] = OSSL_PARAM_construct_octet_string( | |
1245 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len); | |
1246 | ||
1247 | params[1] = OSSL_PARAM_construct_octet_string( | |
1248 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp, | |
1249 | p->len); | |
1250 | params[2] = OSSL_PARAM_construct_uint( | |
1251 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1252 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1253 | if (ret <= 0) | |
1254 | return ret; | |
1255 | params[0] = OSSL_PARAM_construct_size_t( | |
1256 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz); | |
1257 | params[1] = OSSL_PARAM_construct_end(); | |
1258 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1259 | if (ret <= 0) | |
1260 | return 0; | |
1261 | return sz; | |
1262 | } | |
1263 | #endif /* OPENSSL_NO_MULTIBLOCK */ | |
1264 | case EVP_CTRL_AEAD_SET_MAC_KEY: | |
1265 | if (arg < 0) | |
1266 | return -1; | |
1267 | params[0] = OSSL_PARAM_construct_octet_string( | |
1268 | OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz); | |
1269 | break; | |
13273237 | 1270 | } |
459b15d4 SL |
1271 | |
1272 | if (set_params) | |
1273 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1274 | else | |
1275 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
6a36f209 | 1276 | goto end; |
13273237 | 1277 | |
459b15d4 SL |
1278 | /* TODO(3.0): Remove legacy code below */ |
1279 | legacy: | |
1280 | if (ctx->cipher->ctrl == NULL) { | |
0f113f3e MC |
1281 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); |
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
552be00d | 1286 | |
6a36f209 | 1287 | end: |
e870791a | 1288 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
0f113f3e MC |
1289 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, |
1290 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
1291 | return 0; | |
1292 | } | |
1293 | return ret; | |
49528751 | 1294 | } |
216659eb | 1295 | |
ae3ff60e RL |
1296 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
1297 | { | |
1298 | if (cipher != NULL && cipher->get_params != NULL) | |
1299 | return cipher->get_params(params); | |
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1304 | { | |
92d9d0ae RL |
1305 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) |
1306 | return ctx->cipher->set_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1307 | return 0; |
1308 | } | |
1309 | ||
1310 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1311 | { | |
92d9d0ae RL |
1312 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
1313 | return ctx->cipher->get_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1314 | return 0; |
1315 | } | |
1316 | ||
1317 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1318 | { | |
1319 | if (cipher != NULL && cipher->gettable_params != NULL) | |
1320 | return cipher->gettable_params(); | |
1321 | return NULL; | |
1322 | } | |
1323 | ||
41f7ecf3 | 1324 | const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e RL |
1325 | { |
1326 | if (cipher != NULL && cipher->settable_ctx_params != NULL) | |
1327 | return cipher->settable_ctx_params(); | |
1328 | return NULL; | |
1329 | } | |
1330 | ||
41f7ecf3 | 1331 | const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e RL |
1332 | { |
1333 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) | |
1334 | return cipher->gettable_ctx_params(); | |
1335 | return NULL; | |
1336 | } | |
1337 | ||
216659eb | 1338 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e MC |
1339 | { |
1340 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1341 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4a42e264 SL |
1342 | |
1343 | #ifdef FIPS_MODE | |
1344 | return 0; | |
1345 | #else | |
1346 | { | |
1347 | int kl; | |
1348 | ||
1349 | kl = EVP_CIPHER_CTX_key_length(ctx); | |
1350 | if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0) | |
1351 | return 0; | |
1352 | return 1; | |
1353 | } | |
1354 | #endif /* FIPS_MODE */ | |
0f113f3e | 1355 | } |
216659eb | 1356 | |
c2bf7208 | 1357 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1358 | { |
1359 | if ((in == NULL) || (in->cipher == NULL)) { | |
1360 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
1361 | return 0; | |
1362 | } | |
df05f2ce MC |
1363 | |
1364 | if (in->cipher->prov == NULL) | |
1365 | goto legacy; | |
1366 | ||
1367 | if (in->cipher->dupctx == NULL) { | |
1368 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | EVP_CIPHER_CTX_reset(out); | |
1373 | ||
1374 | *out = *in; | |
1375 | out->provctx = NULL; | |
1376 | ||
70c35fd1 | 1377 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1378 | out->fetched_cipher = NULL; |
1379 | return 0; | |
1380 | } | |
1381 | ||
1382 | out->provctx = in->cipher->dupctx(in->provctx); | |
1383 | if (out->provctx == NULL) { | |
1384 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1385 | return 0; | |
1386 | } | |
1387 | ||
1388 | return 1; | |
1389 | ||
1390 | /* TODO(3.0): Remove legacy code below */ | |
1391 | legacy: | |
1392 | ||
319e518a | 1393 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e MC |
1394 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1395 | if (in->engine && !ENGINE_init(in->engine)) { | |
1396 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
1397 | return 0; | |
1398 | } | |
c2bf7208 DSH |
1399 | #endif |
1400 | ||
c0ca39bd | 1401 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1402 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1403 | |
1404 | if (in->cipher_data && in->cipher->ctx_size) { | |
1405 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1406 | if (out->cipher_data == NULL) { |
273a0218 | 1407 | out->cipher = NULL; |
0f113f3e MC |
1408 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); |
1409 | return 0; | |
1410 | } | |
1411 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1412 | } | |
1413 | ||
1414 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1415 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1416 | out->cipher = NULL; | |
1417 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
1418 | return 0; | |
1419 | } | |
0f113f3e MC |
1420 | return 1; |
1421 | } | |
df05f2ce | 1422 | |
550f974a RL |
1423 | EVP_CIPHER *evp_cipher_new(void) |
1424 | { | |
1425 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1426 | ||
1427 | if (cipher != NULL) { | |
1428 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1429 | if (cipher->lock == NULL) { | |
1430 | OPENSSL_free(cipher); | |
1431 | return NULL; | |
1432 | } | |
1433 | cipher->refcnt = 1; | |
1434 | } | |
1435 | return cipher; | |
1436 | } | |
1437 | ||
32040838 RL |
1438 | /* |
1439 | * FIPS module note: since internal fetches will be entirely | |
1440 | * provider based, we know that none of its code depends on legacy | |
1441 | * NIDs or any functionality that use them. | |
1442 | */ | |
1443 | #ifndef FIPS_MODE | |
1444 | /* TODO(3.x) get rid of the need for legacy NIDs */ | |
1445 | static void set_legacy_nid(const char *name, void *vlegacy_nid) | |
1446 | { | |
1447 | int nid; | |
1448 | int *legacy_nid = vlegacy_nid; | |
6a835fcf RL |
1449 | /* |
1450 | * We use lowest level function to get the associated method, because | |
1451 | * higher level functions such as EVP_get_cipherbyname() have changed | |
1452 | * to look at providers too. | |
1453 | */ | |
1454 | const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH); | |
32040838 RL |
1455 | |
1456 | if (*legacy_nid == -1) /* We found a clash already */ | |
1457 | return; | |
6a835fcf | 1458 | if (legacy_method == NULL) |
32040838 | 1459 | return; |
6a835fcf | 1460 | nid = EVP_CIPHER_nid(legacy_method); |
32040838 RL |
1461 | if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
1462 | *legacy_nid = -1; | |
1463 | return; | |
1464 | } | |
1465 | *legacy_nid = nid; | |
1466 | } | |
1467 | #endif | |
1468 | ||
f7c16d48 | 1469 | static void *evp_cipher_from_dispatch(const int name_id, |
6b9e3724 | 1470 | const OSSL_DISPATCH *fns, |
0ddf74bf | 1471 | OSSL_PROVIDER *prov) |
df05f2ce MC |
1472 | { |
1473 | EVP_CIPHER *cipher = NULL; | |
1474 | int fnciphcnt = 0, fnctxcnt = 0; | |
1475 | ||
f7c16d48 | 1476 | if ((cipher = evp_cipher_new()) == NULL) { |
6b9e3724 | 1477 | EVPerr(0, ERR_R_MALLOC_FAILURE); |
df05f2ce | 1478 | return NULL; |
6b9e3724 | 1479 | } |
df05f2ce | 1480 | |
ed71e917 | 1481 | #ifndef FIPS_MODE |
32040838 RL |
1482 | /* TODO(3.x) get rid of the need for legacy NIDs */ |
1483 | cipher->nid = NID_undef; | |
f651c727 | 1484 | evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid); |
32040838 RL |
1485 | if (cipher->nid == -1) { |
1486 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); | |
1487 | EVP_CIPHER_free(cipher); | |
1488 | return NULL; | |
f7c16d48 | 1489 | } |
ed71e917 MC |
1490 | #endif |
1491 | ||
32040838 RL |
1492 | cipher->name_id = name_id; |
1493 | ||
df05f2ce MC |
1494 | for (; fns->function_id != 0; fns++) { |
1495 | switch (fns->function_id) { | |
1496 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1497 | if (cipher->newctx != NULL) | |
1498 | break; | |
1499 | cipher->newctx = OSSL_get_OP_cipher_newctx(fns); | |
1500 | fnctxcnt++; | |
1501 | break; | |
1502 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1503 | if (cipher->einit != NULL) | |
1504 | break; | |
1505 | cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns); | |
1506 | fnciphcnt++; | |
1507 | break; | |
1508 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1509 | if (cipher->dinit != NULL) | |
1510 | break; | |
1511 | cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns); | |
1512 | fnciphcnt++; | |
1513 | break; | |
1514 | case OSSL_FUNC_CIPHER_UPDATE: | |
1515 | if (cipher->cupdate != NULL) | |
1516 | break; | |
1517 | cipher->cupdate = OSSL_get_OP_cipher_update(fns); | |
1518 | fnciphcnt++; | |
1519 | break; | |
1520 | case OSSL_FUNC_CIPHER_FINAL: | |
1521 | if (cipher->cfinal != NULL) | |
1522 | break; | |
1523 | cipher->cfinal = OSSL_get_OP_cipher_final(fns); | |
1524 | fnciphcnt++; | |
1525 | break; | |
718b133a MC |
1526 | case OSSL_FUNC_CIPHER_CIPHER: |
1527 | if (cipher->ccipher != NULL) | |
1528 | break; | |
1529 | cipher->ccipher = OSSL_get_OP_cipher_cipher(fns); | |
1530 | break; | |
df05f2ce MC |
1531 | case OSSL_FUNC_CIPHER_FREECTX: |
1532 | if (cipher->freectx != NULL) | |
1533 | break; | |
1534 | cipher->freectx = OSSL_get_OP_cipher_freectx(fns); | |
1535 | fnctxcnt++; | |
1536 | break; | |
1537 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1538 | if (cipher->dupctx != NULL) | |
1539 | break; | |
1540 | cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns); | |
1541 | break; | |
df05f2ce MC |
1542 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1543 | if (cipher->get_params != NULL) | |
1544 | break; | |
1545 | cipher->get_params = OSSL_get_OP_cipher_get_params(fns); | |
1546 | break; | |
92d9d0ae RL |
1547 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
1548 | if (cipher->get_ctx_params != NULL) | |
718b133a | 1549 | break; |
92d9d0ae | 1550 | cipher->get_ctx_params = OSSL_get_OP_cipher_get_ctx_params(fns); |
718b133a | 1551 | break; |
92d9d0ae RL |
1552 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
1553 | if (cipher->set_ctx_params != NULL) | |
df05f2ce | 1554 | break; |
92d9d0ae | 1555 | cipher->set_ctx_params = OSSL_get_OP_cipher_set_ctx_params(fns); |
df05f2ce | 1556 | break; |
ae3ff60e RL |
1557 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
1558 | if (cipher->gettable_params != NULL) | |
1559 | break; | |
1560 | cipher->gettable_params = OSSL_get_OP_cipher_gettable_params(fns); | |
1561 | break; | |
1562 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1563 | if (cipher->gettable_ctx_params != NULL) | |
1564 | break; | |
1565 | cipher->gettable_ctx_params = | |
1566 | OSSL_get_OP_cipher_gettable_ctx_params(fns); | |
1567 | break; | |
1568 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1569 | if (cipher->settable_ctx_params != NULL) | |
1570 | break; | |
1571 | cipher->settable_ctx_params = | |
1572 | OSSL_get_OP_cipher_settable_ctx_params(fns); | |
1573 | break; | |
df05f2ce MC |
1574 | } |
1575 | } | |
718b133a MC |
1576 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1577 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1578 | || fnctxcnt != 2) { |
df05f2ce MC |
1579 | /* |
1580 | * In order to be a consistent set of functions we must have at least | |
1581 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1582 | * functions, or a single "cipher" function. In all cases we need both |
1583 | * the "newctx" and "freectx" functions. | |
df05f2ce | 1584 | */ |
550f974a | 1585 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1586 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
1587 | return NULL; | |
1588 | } | |
1589 | cipher->prov = prov; | |
1590 | if (prov != NULL) | |
7c95390e | 1591 | ossl_provider_up_ref(prov); |
df05f2ce MC |
1592 | |
1593 | return cipher; | |
1594 | } | |
1595 | ||
70c35fd1 | 1596 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1597 | { |
70c35fd1 | 1598 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1599 | } |
1600 | ||
1601 | static void evp_cipher_free(void *cipher) | |
1602 | { | |
550f974a | 1603 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1604 | } |
1605 | ||
df05f2ce MC |
1606 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, |
1607 | const char *properties) | |
1608 | { | |
0211740f RL |
1609 | EVP_CIPHER *cipher = |
1610 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
0ddf74bf | 1611 | evp_cipher_from_dispatch, evp_cipher_up_ref, |
0211740f RL |
1612 | evp_cipher_free); |
1613 | ||
3c957bcd SL |
1614 | if (cipher != NULL && !evp_cipher_cache_constants(cipher)) { |
1615 | EVP_CIPHER_free(cipher); | |
1616 | cipher = NULL; | |
1617 | } | |
0211740f | 1618 | return cipher; |
df05f2ce | 1619 | } |
c540f00f | 1620 | |
550f974a RL |
1621 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
1622 | { | |
1623 | int ref = 0; | |
1624 | ||
1625 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
1626 | return 1; | |
1627 | } | |
1628 | ||
1629 | void EVP_CIPHER_free(EVP_CIPHER *cipher) | |
1630 | { | |
1631 | int i; | |
1632 | ||
1633 | if (cipher == NULL) | |
1634 | return; | |
1635 | ||
1636 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1637 | if (i > 0) | |
1638 | return; | |
1639 | ossl_provider_free(cipher->prov); | |
550f974a RL |
1640 | CRYPTO_THREAD_lock_free(cipher->lock); |
1641 | OPENSSL_free(cipher); | |
1642 | } | |
1643 | ||
251e610c RL |
1644 | void EVP_CIPHER_do_all_provided(OPENSSL_CTX *libctx, |
1645 | void (*fn)(EVP_CIPHER *mac, void *arg), | |
1646 | void *arg) | |
c540f00f RL |
1647 | { |
1648 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1649 | (void (*)(void *, void *))fn, arg, | |
0ddf74bf | 1650 | evp_cipher_from_dispatch, evp_cipher_free); |
c540f00f | 1651 | } |