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62867571 | 1 | /* |
fecb3aae | 2 | * Copyright 1995-2022 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 | ||
e4468e6d P |
10 | /* We need to use some engine deprecated APIs */ |
11 | #define OPENSSL_SUPPRESS_DEPRECATED | |
12 | ||
d02b48c6 | 13 | #include <stdio.h> |
c9fb704c | 14 | #include <limits.h> |
c3a73daf | 15 | #include <assert.h> |
ec577822 | 16 | #include <openssl/evp.h> |
7f060601 | 17 | #include <openssl/err.h> |
3a87a9b9 | 18 | #include <openssl/rand.h> |
3f773c91 TM |
19 | #ifndef FIPS_MODULE |
20 | # include <openssl/engine.h> | |
21 | #endif | |
df05f2ce MC |
22 | #include <openssl/params.h> |
23 | #include <openssl/core_names.h> | |
6c9bc258 | 24 | #include "internal/cryptlib.h" |
df05f2ce | 25 | #include "internal/provider.h" |
6c9bc258 | 26 | #include "internal/core.h" |
330ff7e6 | 27 | #include "internal/safe_math.h" |
6c9bc258 | 28 | #include "crypto/evp.h" |
706457b7 | 29 | #include "evp_local.h" |
d02b48c6 | 30 | |
330ff7e6 P |
31 | OSSL_SAFE_MATH_SIGNED(int, int) |
32 | ||
df05f2ce | 33 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) |
0f113f3e | 34 | { |
df05f2ce | 35 | if (ctx == NULL) |
8baf9968 | 36 | return 1; |
df05f2ce MC |
37 | |
38 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) | |
39 | goto legacy; | |
40 | ||
7c14d0c1 | 41 | if (ctx->algctx != NULL) { |
df05f2ce | 42 | if (ctx->cipher->freectx != NULL) |
7c14d0c1 SL |
43 | ctx->cipher->freectx(ctx->algctx); |
44 | ctx->algctx = NULL; | |
df05f2ce MC |
45 | } |
46 | if (ctx->fetched_cipher != NULL) | |
550f974a | 47 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 48 | memset(ctx, 0, sizeof(*ctx)); |
b30b45b7 | 49 | ctx->iv_len = -1; |
df05f2ce MC |
50 | |
51 | return 1; | |
52 | ||
0be6cf0c | 53 | /* Remove legacy code below when legacy support is removed. */ |
df05f2ce MC |
54 | legacy: |
55 | ||
56 | if (ctx->cipher != NULL) { | |
57 | if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) | |
8baf9968 RL |
58 | return 0; |
59 | /* Cleanse cipher context data */ | |
df05f2ce MC |
60 | if (ctx->cipher_data && ctx->cipher->ctx_size) |
61 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
8baf9968 | 62 | } |
df05f2ce | 63 | OPENSSL_free(ctx->cipher_data); |
f844f9eb | 64 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 65 | ENGINE_finish(ctx->engine); |
8baf9968 | 66 | #endif |
df05f2ce | 67 | memset(ctx, 0, sizeof(*ctx)); |
b9a2f24e | 68 | ctx->iv_len = -1; |
8baf9968 | 69 | return 1; |
0f113f3e | 70 | } |
d02b48c6 | 71 | |
b40228a6 | 72 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) |
0f113f3e | 73 | { |
b9a2f24e HL |
74 | EVP_CIPHER_CTX *ctx; |
75 | ||
76 | ctx = OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX)); | |
77 | if (ctx == NULL) | |
78 | return NULL; | |
79 | ||
80 | ctx->iv_len = -1; | |
81 | return ctx; | |
8baf9968 RL |
82 | } |
83 | ||
84 | void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) | |
85 | { | |
543e740b RS |
86 | if (ctx == NULL) |
87 | return; | |
8baf9968 RL |
88 | EVP_CIPHER_CTX_reset(ctx); |
89 | OPENSSL_free(ctx); | |
0f113f3e | 90 | } |
581f1c84 | 91 | |
4b58d9b4 P |
92 | static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx, |
93 | const EVP_CIPHER *cipher, | |
94 | ENGINE *impl, const unsigned char *key, | |
95 | const unsigned char *iv, int enc, | |
96 | const OSSL_PARAM params[]) | |
0f113f3e | 97 | { |
c12bf350 | 98 | int n; |
f844f9eb | 99 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 100 | ENGINE *tmpimpl = NULL; |
319e518a | 101 | #endif |
b30b45b7 | 102 | |
df05f2ce MC |
103 | /* |
104 | * enc == 1 means we are encrypting. | |
105 | * enc == 0 means we are decrypting. | |
106 | * enc == -1 means, use the previously initialised value for encrypt/decrypt | |
107 | */ | |
108 | if (enc == -1) { | |
0f113f3e | 109 | enc = ctx->encrypt; |
df05f2ce | 110 | } else { |
0f113f3e MC |
111 | if (enc) |
112 | enc = 1; | |
113 | ctx->encrypt = enc; | |
114 | } | |
df05f2ce MC |
115 | |
116 | if (cipher == NULL && ctx->cipher == NULL) { | |
9311d0c4 | 117 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
df05f2ce MC |
118 | return 0; |
119 | } | |
120 | ||
0be6cf0c | 121 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce | 122 | |
f844f9eb | 123 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
124 | /* |
125 | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so | |
126 | * this context may already have an ENGINE! Try to avoid releasing the | |
127 | * previous handle, re-querying for an ENGINE, and having a | |
0d4fb843 | 128 | * reinitialisation, when it may all be unnecessary. |
0f113f3e | 129 | */ |
f6b94279 | 130 | if (ctx->engine && ctx->cipher |
a7f9e0a4 | 131 | && (cipher == NULL || cipher->nid == ctx->cipher->nid)) |
0f113f3e | 132 | goto skip_to_init; |
df05f2ce MC |
133 | |
134 | if (cipher != NULL && impl == NULL) { | |
135 | /* Ask if an ENGINE is reserved for this job */ | |
136 | tmpimpl = ENGINE_get_cipher_engine(cipher->nid); | |
137 | } | |
0b13e9f0 | 138 | #endif |
df05f2ce MC |
139 | |
140 | /* | |
141 | * If there are engines involved then we should use legacy handling for now. | |
142 | */ | |
143 | if (ctx->engine != NULL | |
f844f9eb | 144 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
319e518a MC |
145 | || tmpimpl != NULL |
146 | #endif | |
147 | || impl != NULL) { | |
df05f2ce MC |
148 | if (ctx->cipher == ctx->fetched_cipher) |
149 | ctx->cipher = NULL; | |
550f974a | 150 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
151 | ctx->fetched_cipher = NULL; |
152 | goto legacy; | |
153 | } | |
df05f2ce MC |
154 | /* |
155 | * Ensure a context left lying around from last time is cleared | |
156 | * (legacy code) | |
157 | */ | |
158 | if (cipher != NULL && ctx->cipher != NULL) { | |
159 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
160 | ctx->cipher_data = NULL; | |
161 | } | |
162 | ||
163 | ||
0be6cf0c | 164 | /* Start of non-legacy code below */ |
df05f2ce MC |
165 | |
166 | /* Ensure a context left lying around from last time is cleared */ | |
167 | if (cipher != NULL && ctx->cipher != NULL) { | |
168 | unsigned long flags = ctx->flags; | |
169 | ||
170 | EVP_CIPHER_CTX_reset(ctx); | |
171 | /* Restore encrypt and flags */ | |
172 | ctx->encrypt = enc; | |
173 | ctx->flags = flags; | |
174 | } | |
175 | ||
7f612b1f | 176 | if (cipher == NULL) |
df05f2ce MC |
177 | cipher = ctx->cipher; |
178 | ||
179 | if (cipher->prov == NULL) { | |
f844f9eb | 180 | #ifdef FIPS_MODULE |
79c44b4e | 181 | /* We only do explicit fetches inside the FIPS module */ |
9311d0c4 | 182 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
319e518a MC |
183 | return 0; |
184 | #else | |
185 | EVP_CIPHER *provciph = | |
068489a2 MC |
186 | EVP_CIPHER_fetch(NULL, |
187 | cipher->nid == NID_undef ? "NULL" | |
188 | : OBJ_nid2sn(cipher->nid), | |
189 | ""); | |
319e518a | 190 | |
ec0ce188 | 191 | if (provciph == NULL) |
df05f2ce | 192 | return 0; |
df05f2ce | 193 | cipher = provciph; |
550f974a | 194 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 195 | ctx->fetched_cipher = provciph; |
319e518a | 196 | #endif |
df05f2ce MC |
197 | } |
198 | ||
aea01d13 P |
199 | if (cipher->prov != NULL) { |
200 | if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) { | |
201 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
202 | return 0; | |
203 | } | |
204 | EVP_CIPHER_free(ctx->fetched_cipher); | |
71b7f349 P |
205 | /* Coverity false positive, the reference counting is confusing it */ |
206 | /* coverity[use_after_free] */ | |
aea01d13 P |
207 | ctx->fetched_cipher = (EVP_CIPHER *)cipher; |
208 | } | |
df05f2ce | 209 | ctx->cipher = cipher; |
7c14d0c1 SL |
210 | if (ctx->algctx == NULL) { |
211 | ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); | |
212 | if (ctx->algctx == NULL) { | |
9311d0c4 | 213 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
214 | return 0; |
215 | } | |
216 | } | |
217 | ||
218 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 219 | /* |
df05f2ce MC |
220 | * If this ctx was already set up for no padding then we need to tell |
221 | * the new cipher about it. | |
222 | */ | |
223 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
224 | return 0; | |
225 | } | |
226 | ||
227 | if (enc) { | |
228 | if (ctx->cipher->einit == NULL) { | |
9311d0c4 | 229 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
230 | return 0; |
231 | } | |
232 | ||
7c14d0c1 | 233 | return ctx->cipher->einit(ctx->algctx, |
344cfa34 | 234 | key, |
33b40a10 | 235 | key == NULL ? 0 |
ed576acd | 236 | : EVP_CIPHER_CTX_get_key_length(ctx), |
344cfa34 | 237 | iv, |
33b40a10 | 238 | iv == NULL ? 0 |
ed576acd | 239 | : EVP_CIPHER_CTX_get_iv_length(ctx), |
4b58d9b4 | 240 | params); |
df05f2ce MC |
241 | } |
242 | ||
243 | if (ctx->cipher->dinit == NULL) { | |
9311d0c4 | 244 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
245 | return 0; |
246 | } | |
247 | ||
7c14d0c1 | 248 | return ctx->cipher->dinit(ctx->algctx, |
344cfa34 | 249 | key, |
33b40a10 | 250 | key == NULL ? 0 |
ed576acd | 251 | : EVP_CIPHER_CTX_get_key_length(ctx), |
344cfa34 | 252 | iv, |
33b40a10 | 253 | iv == NULL ? 0 |
ed576acd | 254 | : EVP_CIPHER_CTX_get_iv_length(ctx), |
4b58d9b4 | 255 | params); |
df05f2ce | 256 | |
0be6cf0c | 257 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
258 | legacy: |
259 | ||
260 | if (cipher != NULL) { | |
261 | /* | |
262 | * Ensure a context left lying around from last time is cleared (we | |
263 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
264 | * EVP_CIPHER could be used). |
265 | */ | |
266 | if (ctx->cipher) { | |
267 | unsigned long flags = ctx->flags; | |
c0ca39bd | 268 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
269 | /* Restore encrypt and flags */ |
270 | ctx->encrypt = enc; | |
271 | ctx->flags = flags; | |
272 | } | |
f844f9eb | 273 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 274 | if (impl != NULL) { |
0f113f3e | 275 | if (!ENGINE_init(impl)) { |
9311d0c4 | 276 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
277 | return 0; |
278 | } | |
df05f2ce MC |
279 | } else { |
280 | impl = tmpimpl; | |
281 | } | |
282 | if (impl != NULL) { | |
0f113f3e MC |
283 | /* There's an ENGINE for this job ... (apparently) */ |
284 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
285 | |
286 | if (c == NULL) { | |
0f113f3e MC |
287 | /* |
288 | * One positive side-effect of US's export control history, | |
289 | * is that we should at least be able to avoid using US | |
0d4fb843 | 290 | * misspellings of "initialisation"? |
0f113f3e | 291 | */ |
9311d0c4 | 292 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
293 | return 0; |
294 | } | |
295 | /* We'll use the ENGINE's private cipher definition */ | |
296 | cipher = c; | |
297 | /* | |
298 | * Store the ENGINE functional reference so we know 'cipher' came | |
299 | * from an ENGINE and we need to release it when done. | |
300 | */ | |
301 | ctx->engine = impl; | |
df05f2ce | 302 | } else { |
0f113f3e | 303 | ctx->engine = NULL; |
df05f2ce | 304 | } |
0b13e9f0 | 305 | #endif |
544a2aea | 306 | |
0f113f3e MC |
307 | ctx->cipher = cipher; |
308 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 309 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 310 | if (ctx->cipher_data == NULL) { |
273a0218 | 311 | ctx->cipher = NULL; |
9311d0c4 | 312 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
313 | return 0; |
314 | } | |
315 | } else { | |
316 | ctx->cipher_data = NULL; | |
317 | } | |
318 | ctx->key_len = cipher->key_len; | |
319 | /* Preserve wrap enable flag, zero everything else */ | |
320 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
321 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
d649c51a | 322 | if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL) <= 0) { |
273a0218 | 323 | ctx->cipher = NULL; |
9311d0c4 | 324 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
325 | return 0; |
326 | } | |
327 | } | |
0f113f3e | 328 | } |
f844f9eb | 329 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e | 330 | skip_to_init: |
0b13e9f0 | 331 | #endif |
1702c500 P |
332 | if (ctx->cipher == NULL) |
333 | return 0; | |
334 | ||
0f113f3e MC |
335 | /* we assume block size is a power of 2 in *cryptUpdate */ |
336 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
337 | || ctx->cipher->block_size == 8 | |
338 | || ctx->cipher->block_size == 16); | |
339 | ||
340 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
ed576acd | 341 | && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) { |
9311d0c4 | 342 | ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED); |
0f113f3e MC |
343 | return 0; |
344 | } | |
345 | ||
ed576acd | 346 | if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx)) |
f6c95e46 | 347 | & EVP_CIPH_CUSTOM_IV) == 0) { |
ed576acd | 348 | switch (EVP_CIPHER_CTX_get_mode(ctx)) { |
0f113f3e MC |
349 | |
350 | case EVP_CIPH_STREAM_CIPHER: | |
351 | case EVP_CIPH_ECB_MODE: | |
352 | break; | |
353 | ||
354 | case EVP_CIPH_CFB_MODE: | |
355 | case EVP_CIPH_OFB_MODE: | |
356 | ||
357 | ctx->num = 0; | |
358 | /* fall-through */ | |
359 | ||
360 | case EVP_CIPH_CBC_MODE: | |
ed576acd | 361 | n = EVP_CIPHER_CTX_get_iv_length(ctx); |
d1592f21 P |
362 | if (n < 0 || n > (int)sizeof(ctx->iv)) { |
363 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH); | |
364 | return 0; | |
365 | } | |
cec8854c | 366 | if (iv != NULL) |
69807ab8 P |
367 | memcpy(ctx->oiv, iv, n); |
368 | memcpy(ctx->iv, ctx->oiv, n); | |
0f113f3e MC |
369 | break; |
370 | ||
371 | case EVP_CIPH_CTR_MODE: | |
372 | ctx->num = 0; | |
373 | /* Don't reuse IV for CTR mode */ | |
cec8854c | 374 | if (iv != NULL) { |
d1592f21 P |
375 | n = EVP_CIPHER_CTX_get_iv_length(ctx); |
376 | if (n <= 0 || n > (int)sizeof(ctx->iv)) { | |
377 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH); | |
cec8854c | 378 | return 0; |
d1592f21 | 379 | } |
cec8854c P |
380 | memcpy(ctx->iv, iv, n); |
381 | } | |
0f113f3e MC |
382 | break; |
383 | ||
384 | default: | |
385 | return 0; | |
0f113f3e MC |
386 | } |
387 | } | |
388 | ||
cec8854c | 389 | if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { |
0f113f3e MC |
390 | if (!ctx->cipher->init(ctx, key, iv, enc)) |
391 | return 0; | |
392 | } | |
393 | ctx->buf_len = 0; | |
394 | ctx->final_used = 0; | |
395 | ctx->block_mask = ctx->cipher->block_size - 1; | |
396 | return 1; | |
397 | } | |
d02b48c6 | 398 | |
4b58d9b4 P |
399 | int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
400 | const unsigned char *key, const unsigned char *iv, | |
401 | int enc, const OSSL_PARAM params[]) | |
402 | { | |
403 | return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params); | |
404 | } | |
405 | ||
406 | int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
407 | const unsigned char *key, const unsigned char *iv, int enc) | |
408 | { | |
409 | if (cipher != NULL) | |
410 | EVP_CIPHER_CTX_reset(ctx); | |
411 | return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL); | |
412 | } | |
413 | ||
414 | int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
415 | ENGINE *impl, const unsigned char *key, | |
416 | const unsigned char *iv, int enc) | |
417 | { | |
418 | return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL); | |
419 | } | |
420 | ||
be06a934 | 421 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
422 | const unsigned char *in, int inl) |
423 | { | |
424 | if (ctx->encrypt) | |
425 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
426 | else | |
427 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
428 | } | |
d02b48c6 | 429 | |
581f1c84 | 430 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
431 | { |
432 | if (ctx->encrypt) | |
433 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
434 | else | |
435 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
436 | } | |
581f1c84 | 437 | |
6b691a5c | 438 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
439 | { |
440 | if (ctx->encrypt) | |
441 | return EVP_EncryptFinal(ctx, out, outl); | |
442 | else | |
443 | return EVP_DecryptFinal(ctx, out, outl); | |
444 | } | |
d02b48c6 | 445 | |
be06a934 | 446 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
447 | const unsigned char *key, const unsigned char *iv) |
448 | { | |
449 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
450 | } | |
18eda732 | 451 | |
0f113f3e MC |
452 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
453 | ENGINE *impl, const unsigned char *key, | |
454 | const unsigned char *iv) | |
455 | { | |
456 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
457 | } | |
d02b48c6 | 458 | |
4b58d9b4 P |
459 | int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
460 | const unsigned char *key, const unsigned char *iv, | |
461 | const OSSL_PARAM params[]) | |
462 | { | |
463 | return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params); | |
464 | } | |
465 | ||
be06a934 | 466 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
467 | const unsigned char *key, const unsigned char *iv) |
468 | { | |
469 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
470 | } | |
18eda732 | 471 | |
0f113f3e MC |
472 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
473 | ENGINE *impl, const unsigned char *key, | |
474 | const unsigned char *iv) | |
475 | { | |
476 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
477 | } | |
d02b48c6 | 478 | |
4b58d9b4 P |
479 | int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
480 | const unsigned char *key, const unsigned char *iv, | |
481 | const OSSL_PARAM params[]) | |
482 | { | |
483 | return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params); | |
484 | } | |
485 | ||
c3a73daf AP |
486 | /* |
487 | * According to the letter of standard difference between pointers | |
488 | * is specified to be valid only within same object. This makes | |
489 | * it formally challenging to determine if input and output buffers | |
490 | * are not partially overlapping with standard pointer arithmetic. | |
491 | */ | |
492 | #ifdef PTRDIFF_T | |
493 | # undef PTRDIFF_T | |
494 | #endif | |
495 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
496 | /* | |
497 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
498 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
499 | * difference between two pointers might be truncated to 32 bits. | |
500 | * In the context one can even wonder how comparison for | |
501 | * equality is implemented. To be on the safe side we adhere to | |
502 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
503 | */ |
504 | # define PTRDIFF_T uint64_t | |
505 | #else | |
506 | # define PTRDIFF_T size_t | |
507 | #endif | |
508 | ||
6d777689 | 509 | int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
510 | { |
511 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
512 | /* | |
513 | * Check for partially overlapping buffers. [Binary logical | |
514 | * operations are used instead of boolean to minimize number | |
515 | * of conditional branches.] | |
516 | */ | |
83151b73 AP |
517 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
518 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 519 | |
83151b73 | 520 | return overlapped; |
c3a73daf AP |
521 | } |
522 | ||
a8bf2f8f RL |
523 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
524 | unsigned char *out, int *outl, | |
525 | const unsigned char *in, int inl) | |
0f113f3e | 526 | { |
64846096 LP |
527 | int i, j, bl, cmpl = inl; |
528 | ||
529 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
330ff7e6 | 530 | cmpl = safe_div_round_up_int(cmpl, 8, NULL); |
0f113f3e | 531 | |
7141ba31 MC |
532 | bl = ctx->cipher->block_size; |
533 | ||
0f113f3e | 534 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 535 | /* If block size > 1 then the cipher will have to do this check */ |
6d777689 | 536 | if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { |
9311d0c4 | 537 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 538 | return 0; |
83151b73 | 539 | } |
5fc77684 | 540 | |
0f113f3e MC |
541 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
542 | if (i < 0) | |
543 | return 0; | |
544 | else | |
545 | *outl = i; | |
546 | return 1; | |
547 | } | |
548 | ||
2c236894 MC |
549 | if (inl <= 0) { |
550 | *outl = 0; | |
551 | return inl == 0; | |
552 | } | |
6d777689 | 553 | if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
9311d0c4 | 554 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 555 | return 0; |
83151b73 | 556 | } |
0f113f3e MC |
557 | |
558 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
559 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
560 | *outl = inl; | |
561 | return 1; | |
562 | } else { | |
563 | *outl = 0; | |
564 | return 0; | |
565 | } | |
566 | } | |
567 | i = ctx->buf_len; | |
0f113f3e MC |
568 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
569 | if (i != 0) { | |
3f358213 | 570 | if (bl - i > inl) { |
0f113f3e MC |
571 | memcpy(&(ctx->buf[i]), in, inl); |
572 | ctx->buf_len += inl; | |
573 | *outl = 0; | |
574 | return 1; | |
575 | } else { | |
576 | j = bl - i; | |
c9fb704c MC |
577 | |
578 | /* | |
579 | * Once we've processed the first j bytes from in, the amount of | |
580 | * data left that is a multiple of the block length is: | |
581 | * (inl - j) & ~(bl - 1) | |
582 | * We must ensure that this amount of data, plus the one block that | |
583 | * we process from ctx->buf does not exceed INT_MAX | |
584 | */ | |
585 | if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) { | |
586 | ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); | |
587 | return 0; | |
588 | } | |
0f113f3e | 589 | memcpy(&(ctx->buf[i]), in, j); |
0f113f3e MC |
590 | inl -= j; |
591 | in += j; | |
5fc77684 AP |
592 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
593 | return 0; | |
0f113f3e MC |
594 | out += bl; |
595 | *outl = bl; | |
596 | } | |
597 | } else | |
598 | *outl = 0; | |
599 | i = inl & (bl - 1); | |
600 | inl -= i; | |
601 | if (inl > 0) { | |
602 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
603 | return 0; | |
604 | *outl += inl; | |
605 | } | |
606 | ||
607 | if (i != 0) | |
608 | memcpy(ctx->buf, &(in[inl]), i); | |
609 | ctx->buf_len = i; | |
610 | return 1; | |
611 | } | |
d02b48c6 | 612 | |
a8bf2f8f RL |
613 | |
614 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
615 | const unsigned char *in, int inl) | |
616 | { | |
df05f2ce | 617 | int ret; |
1832bb0f | 618 | size_t soutl, inl_ = (size_t)inl; |
3b94944c | 619 | int blocksize; |
df05f2ce | 620 | |
3d4c81b0 | 621 | if (outl != NULL) { |
622 | *outl = 0; | |
623 | } else { | |
9311d0c4 | 624 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 625 | return 0; |
626 | } | |
627 | ||
a8bf2f8f RL |
628 | /* Prevent accidental use of decryption context when encrypting */ |
629 | if (!ctx->encrypt) { | |
9311d0c4 | 630 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
631 | return 0; |
632 | } | |
633 | ||
d4d89a07 | 634 | if (ctx->cipher == NULL) { |
9311d0c4 | 635 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d4d89a07 SS |
636 | return 0; |
637 | } | |
638 | ||
639 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
640 | goto legacy; |
641 | ||
30af356d | 642 | blocksize = ctx->cipher->block_size; |
3b94944c MC |
643 | |
644 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
9311d0c4 | 645 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
646 | return 0; |
647 | } | |
1832bb0f | 648 | |
7c14d0c1 | 649 | ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl, |
1832bb0f HL |
650 | inl_ + (size_t)(blocksize == 1 ? 0 : blocksize), |
651 | in, inl_); | |
df05f2ce | 652 | |
36e619d7 GV |
653 | if (ret) { |
654 | if (soutl > INT_MAX) { | |
9311d0c4 | 655 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
36e619d7 GV |
656 | return 0; |
657 | } | |
658 | *outl = soutl; | |
df05f2ce | 659 | } |
36e619d7 | 660 | |
df05f2ce MC |
661 | return ret; |
662 | ||
0be6cf0c | 663 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
664 | legacy: |
665 | ||
a8bf2f8f RL |
666 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
667 | } | |
668 | ||
be06a934 | 669 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
670 | { |
671 | int ret; | |
672 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
673 | return ret; | |
674 | } | |
581f1c84 DSH |
675 | |
676 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
677 | { |
678 | int n, ret; | |
679 | unsigned int i, b, bl; | |
df05f2ce | 680 | size_t soutl; |
3b94944c | 681 | int blocksize; |
0f113f3e | 682 | |
3d4c81b0 | 683 | if (outl != NULL) { |
684 | *outl = 0; | |
685 | } else { | |
9311d0c4 | 686 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 687 | return 0; |
688 | } | |
689 | ||
a8bf2f8f RL |
690 | /* Prevent accidental use of decryption context when encrypting */ |
691 | if (!ctx->encrypt) { | |
9311d0c4 | 692 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
693 | return 0; |
694 | } | |
695 | ||
4894dcad | 696 | if (ctx->cipher == NULL) { |
9311d0c4 | 697 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
4894dcad P |
698 | return 0; |
699 | } | |
700 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
701 | goto legacy; |
702 | ||
ed576acd | 703 | blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
3b94944c MC |
704 | |
705 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
9311d0c4 | 706 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
707 | return 0; |
708 | } | |
709 | ||
7c14d0c1 | 710 | ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl, |
3b94944c | 711 | blocksize == 1 ? 0 : blocksize); |
df05f2ce | 712 | |
36e619d7 GV |
713 | if (ret) { |
714 | if (soutl > INT_MAX) { | |
9311d0c4 | 715 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
36e619d7 GV |
716 | return 0; |
717 | } | |
718 | *outl = soutl; | |
df05f2ce | 719 | } |
df05f2ce MC |
720 | |
721 | return ret; | |
722 | ||
0be6cf0c | 723 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
724 | legacy: |
725 | ||
0f113f3e MC |
726 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
727 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
728 | if (ret < 0) | |
729 | return 0; | |
730 | else | |
731 | *outl = ret; | |
732 | return 1; | |
733 | } | |
734 | ||
735 | b = ctx->cipher->block_size; | |
cbe29648 | 736 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
737 | if (b == 1) { |
738 | *outl = 0; | |
739 | return 1; | |
740 | } | |
741 | bl = ctx->buf_len; | |
742 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
743 | if (bl) { | |
9311d0c4 | 744 | ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); |
0f113f3e MC |
745 | return 0; |
746 | } | |
747 | *outl = 0; | |
748 | return 1; | |
749 | } | |
750 | ||
751 | n = b - bl; | |
752 | for (i = bl; i < b; i++) | |
753 | ctx->buf[i] = n; | |
754 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
755 | ||
756 | if (ret) | |
757 | *outl = b; | |
758 | ||
759 | return ret; | |
760 | } | |
d02b48c6 | 761 | |
be06a934 | 762 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
763 | const unsigned char *in, int inl) |
764 | { | |
df05f2ce | 765 | int fix_len, cmpl = inl, ret; |
0f113f3e | 766 | unsigned int b; |
1832bb0f | 767 | size_t soutl, inl_ = (size_t)inl; |
3b94944c | 768 | int blocksize; |
0f113f3e | 769 | |
3d4c81b0 | 770 | if (outl != NULL) { |
771 | *outl = 0; | |
772 | } else { | |
9311d0c4 | 773 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 774 | return 0; |
775 | } | |
776 | ||
a8bf2f8f RL |
777 | /* Prevent accidental use of encryption context when decrypting */ |
778 | if (ctx->encrypt) { | |
9311d0c4 | 779 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
780 | return 0; |
781 | } | |
782 | ||
d2c2e49e | 783 | if (ctx->cipher == NULL) { |
9311d0c4 | 784 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d2c2e49e P |
785 | return 0; |
786 | } | |
787 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
788 | goto legacy; |
789 | ||
ed576acd | 790 | blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
3b94944c MC |
791 | |
792 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
9311d0c4 | 793 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
794 | return 0; |
795 | } | |
7c14d0c1 | 796 | ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl, |
1832bb0f HL |
797 | inl_ + (size_t)(blocksize == 1 ? 0 : blocksize), |
798 | in, inl_); | |
df05f2ce MC |
799 | |
800 | if (ret) { | |
801 | if (soutl > INT_MAX) { | |
9311d0c4 | 802 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
803 | return 0; |
804 | } | |
805 | *outl = soutl; | |
806 | } | |
807 | ||
808 | return ret; | |
809 | ||
0be6cf0c | 810 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
811 | legacy: |
812 | ||
7141ba31 MC |
813 | b = ctx->cipher->block_size; |
814 | ||
64846096 | 815 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
330ff7e6 | 816 | cmpl = safe_div_round_up_int(cmpl, 8, NULL); |
64846096 | 817 | |
0f113f3e | 818 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
6d777689 | 819 | if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { |
9311d0c4 | 820 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 821 | return 0; |
83151b73 | 822 | } |
5fc77684 | 823 | |
0f113f3e MC |
824 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
825 | if (fix_len < 0) { | |
826 | *outl = 0; | |
827 | return 0; | |
828 | } else | |
829 | *outl = fix_len; | |
830 | return 1; | |
831 | } | |
832 | ||
2c236894 MC |
833 | if (inl <= 0) { |
834 | *outl = 0; | |
835 | return inl == 0; | |
836 | } | |
837 | ||
0f113f3e | 838 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 839 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 840 | |
cbe29648 | 841 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
842 | |
843 | if (ctx->final_used) { | |
5fc77684 AP |
844 | /* see comment about PTRDIFF_T comparison above */ |
845 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
6d777689 | 846 | || ossl_is_partially_overlapping(out, in, b)) { |
9311d0c4 | 847 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 848 | return 0; |
83151b73 | 849 | } |
c9fb704c MC |
850 | /* |
851 | * final_used is only ever set if buf_len is 0. Therefore the maximum | |
852 | * length output we will ever see from evp_EncryptDecryptUpdate is | |
853 | * the maximum multiple of the block length that is <= inl, or just: | |
854 | * inl & ~(b - 1) | |
855 | * Since final_used has been set then the final output length is: | |
856 | * (inl & ~(b - 1)) + b | |
857 | * This must never exceed INT_MAX | |
858 | */ | |
859 | if ((inl & ~(b - 1)) > INT_MAX - b) { | |
860 | ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); | |
861 | return 0; | |
862 | } | |
0f113f3e MC |
863 | memcpy(out, ctx->final, b); |
864 | out += b; | |
865 | fix_len = 1; | |
866 | } else | |
867 | fix_len = 0; | |
868 | ||
a8bf2f8f | 869 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
870 | return 0; |
871 | ||
872 | /* | |
873 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
874 | * copy of this last block | |
875 | */ | |
876 | if (b > 1 && !ctx->buf_len) { | |
877 | *outl -= b; | |
878 | ctx->final_used = 1; | |
879 | memcpy(ctx->final, &out[*outl], b); | |
880 | } else | |
881 | ctx->final_used = 0; | |
882 | ||
883 | if (fix_len) | |
884 | *outl += b; | |
885 | ||
886 | return 1; | |
887 | } | |
d02b48c6 | 888 | |
6b691a5c | 889 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
890 | { |
891 | int ret; | |
892 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
893 | return ret; | |
894 | } | |
581f1c84 DSH |
895 | |
896 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
897 | { |
898 | int i, n; | |
899 | unsigned int b; | |
df05f2ce MC |
900 | size_t soutl; |
901 | int ret; | |
3b94944c | 902 | int blocksize; |
a8bf2f8f | 903 | |
3d4c81b0 | 904 | if (outl != NULL) { |
905 | *outl = 0; | |
906 | } else { | |
9311d0c4 | 907 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 908 | return 0; |
909 | } | |
910 | ||
a8bf2f8f RL |
911 | /* Prevent accidental use of encryption context when decrypting */ |
912 | if (ctx->encrypt) { | |
9311d0c4 | 913 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
914 | return 0; |
915 | } | |
916 | ||
d4d89a07 | 917 | if (ctx->cipher == NULL) { |
9311d0c4 | 918 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d4d89a07 SS |
919 | return 0; |
920 | } | |
921 | ||
922 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
923 | goto legacy; |
924 | ||
ed576acd | 925 | blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
3b94944c MC |
926 | |
927 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
9311d0c4 | 928 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
929 | return 0; |
930 | } | |
931 | ||
7c14d0c1 | 932 | ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl, |
3b94944c | 933 | blocksize == 1 ? 0 : blocksize); |
df05f2ce MC |
934 | |
935 | if (ret) { | |
936 | if (soutl > INT_MAX) { | |
9311d0c4 | 937 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
938 | return 0; |
939 | } | |
940 | *outl = soutl; | |
941 | } | |
942 | ||
943 | return ret; | |
944 | ||
0be6cf0c | 945 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
946 | legacy: |
947 | ||
0f113f3e | 948 | *outl = 0; |
0f113f3e MC |
949 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
950 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
951 | if (i < 0) | |
952 | return 0; | |
953 | else | |
954 | *outl = i; | |
955 | return 1; | |
956 | } | |
957 | ||
958 | b = ctx->cipher->block_size; | |
959 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
960 | if (ctx->buf_len) { | |
9311d0c4 | 961 | ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); |
0f113f3e MC |
962 | return 0; |
963 | } | |
964 | *outl = 0; | |
965 | return 1; | |
966 | } | |
967 | if (b > 1) { | |
968 | if (ctx->buf_len || !ctx->final_used) { | |
9311d0c4 | 969 | ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH); |
26a7d938 | 970 | return 0; |
0f113f3e | 971 | } |
cbe29648 | 972 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
973 | |
974 | /* | |
975 | * The following assumes that the ciphertext has been authenticated. | |
976 | * Otherwise it provides a padding oracle. | |
977 | */ | |
978 | n = ctx->final[b - 1]; | |
979 | if (n == 0 || n > (int)b) { | |
9311d0c4 | 980 | ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); |
26a7d938 | 981 | return 0; |
0f113f3e MC |
982 | } |
983 | for (i = 0; i < n; i++) { | |
984 | if (ctx->final[--b] != n) { | |
9311d0c4 | 985 | ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); |
26a7d938 | 986 | return 0; |
0f113f3e MC |
987 | } |
988 | } | |
989 | n = ctx->cipher->block_size - n; | |
990 | for (i = 0; i < n; i++) | |
991 | out[i] = ctx->final[i]; | |
992 | *outl = n; | |
993 | } else | |
994 | *outl = 0; | |
208fb891 | 995 | return 1; |
0f113f3e | 996 | } |
d02b48c6 | 997 | |
6343829a | 998 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 999 | { |
d23adad1 MC |
1000 | if (c->cipher->prov != NULL) { |
1001 | int ok; | |
1002 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
70f39a48 | 1003 | size_t len; |
459b15d4 | 1004 | |
ed576acd | 1005 | if (EVP_CIPHER_CTX_get_key_length(c) == keylen) |
d23adad1 MC |
1006 | return 1; |
1007 | ||
1008 | /* Check the cipher actually understands this parameter */ | |
1009 | if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher), | |
0f70d601 TM |
1010 | OSSL_CIPHER_PARAM_KEYLEN) == NULL) { |
1011 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH); | |
d23adad1 | 1012 | return 0; |
0f70d601 | 1013 | } |
d23adad1 MC |
1014 | |
1015 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); | |
70f39a48 P |
1016 | if (!OSSL_PARAM_set_int(params, keylen)) |
1017 | return 0; | |
7c14d0c1 | 1018 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params); |
70f39a48 P |
1019 | if (ok <= 0) |
1020 | return 0; | |
1021 | c->key_len = keylen; | |
1022 | return 1; | |
d23adad1 | 1023 | } |
13273237 | 1024 | |
0be6cf0c | 1025 | /* Code below to be removed when legacy support is dropped. */ |
d23adad1 MC |
1026 | |
1027 | /* | |
1028 | * Note there have never been any built-in ciphers that define this flag | |
1029 | * since it was first introduced. | |
1030 | */ | |
0f113f3e MC |
1031 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
1032 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
ed576acd | 1033 | if (EVP_CIPHER_CTX_get_key_length(c) == keylen) |
0f113f3e MC |
1034 | return 1; |
1035 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
1036 | c->key_len = keylen; | |
1037 | return 1; | |
1038 | } | |
9311d0c4 | 1039 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH); |
0f113f3e MC |
1040 | return 0; |
1041 | } | |
49528751 | 1042 | |
f2e5ca84 | 1043 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 1044 | { |
13273237 | 1045 | int ok; |
459b15d4 | 1046 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
1c3ace68 | 1047 | unsigned int pd = pad; |
13273237 | 1048 | |
0f113f3e MC |
1049 | if (pad) |
1050 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
1051 | else | |
1052 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 1053 | |
719bc0e8 SL |
1054 | if (ctx->cipher != NULL && ctx->cipher->prov == NULL) |
1055 | return 1; | |
1c3ace68 | 1056 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
7c14d0c1 | 1057 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
459b15d4 | 1058 | |
13273237 | 1059 | return ok != 0; |
0f113f3e | 1060 | } |
f2e5ca84 | 1061 | |
49528751 DSH |
1062 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
1063 | { | |
e870791a | 1064 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 | 1065 | int set_params = 1; |
1c3ace68 | 1066 | size_t sz = arg; |
6a41156c | 1067 | unsigned int i; |
0d2bfe52 SL |
1068 | OSSL_PARAM params[4] = { |
1069 | OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END | |
1070 | }; | |
d91f4568 | 1071 | |
459b15d4 | 1072 | if (ctx == NULL || ctx->cipher == NULL) { |
9311d0c4 | 1073 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
0f113f3e MC |
1074 | return 0; |
1075 | } | |
1076 | ||
13273237 RL |
1077 | if (ctx->cipher->prov == NULL) |
1078 | goto legacy; | |
1079 | ||
1080 | switch (type) { | |
1081 | case EVP_CTRL_SET_KEY_LENGTH: | |
1c3ace68 | 1082 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
70f39a48 | 1083 | ctx->key_len = -1; |
13273237 RL |
1084 | break; |
1085 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
4a42e264 SL |
1086 | set_params = 0; |
1087 | params[0] = | |
1088 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1c3ace68 | 1089 | ptr, sz); |
4a42e264 SL |
1090 | break; |
1091 | ||
d6d74cf4 RL |
1092 | case EVP_CTRL_INIT: |
1093 | /* | |
0be6cf0c | 1094 | * EVP_CTRL_INIT is purely legacy, no provider counterpart. |
d6d74cf4 RL |
1095 | * As a matter of fact, this should be dead code, but some caller |
1096 | * might still do a direct control call with this command, so... | |
1097 | * Legacy methods return 1 except for exceptional circumstances, so | |
1098 | * we do the same here to not be disruptive. | |
1099 | */ | |
1100 | return 1; | |
13273237 | 1101 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
459b15d4 | 1102 | default: |
6a36f209 | 1103 | goto end; |
459b15d4 SL |
1104 | case EVP_CTRL_AEAD_SET_IVLEN: |
1105 | if (arg < 0) | |
1106 | return 0; | |
1c3ace68 | 1107 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
b30b45b7 | 1108 | ctx->iv_len = -1; |
13273237 | 1109 | break; |
f5d0c02c SL |
1110 | case EVP_CTRL_CCM_SET_L: |
1111 | if (arg < 2 || arg > 8) | |
1112 | return 0; | |
1113 | sz = 15 - arg; | |
1114 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); | |
b30b45b7 | 1115 | ctx->iv_len = -1; |
f5d0c02c | 1116 | break; |
11b44359 SL |
1117 | case EVP_CTRL_AEAD_SET_IV_FIXED: |
1118 | params[0] = OSSL_PARAM_construct_octet_string( | |
1119 | OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz); | |
1120 | break; | |
1121 | case EVP_CTRL_GCM_IV_GEN: | |
1122 | set_params = 0; | |
1123 | if (arg < 0) | |
1124 | sz = 0; /* special case that uses the iv length */ | |
1125 | params[0] = OSSL_PARAM_construct_octet_string( | |
1126 | OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz); | |
1127 | break; | |
1128 | case EVP_CTRL_GCM_SET_IV_INV: | |
1129 | if (arg < 0) | |
1130 | return 0; | |
1131 | params[0] = OSSL_PARAM_construct_octet_string( | |
1132 | OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz); | |
459b15d4 | 1133 | break; |
6a41156c SL |
1134 | case EVP_CTRL_GET_RC5_ROUNDS: |
1135 | set_params = 0; /* Fall thru */ | |
1136 | case EVP_CTRL_SET_RC5_ROUNDS: | |
1137 | if (arg < 0) | |
1138 | return 0; | |
1139 | i = (unsigned int)arg; | |
1140 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i); | |
1141 | break; | |
eb173822 SL |
1142 | case EVP_CTRL_SET_SPEED: |
1143 | if (arg < 0) | |
1144 | return 0; | |
1145 | i = (unsigned int)arg; | |
1146 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i); | |
1147 | break; | |
459b15d4 | 1148 | case EVP_CTRL_AEAD_GET_TAG: |
1c3ace68 SL |
1149 | set_params = 0; /* Fall thru */ |
1150 | case EVP_CTRL_AEAD_SET_TAG: | |
459b15d4 | 1151 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
1c3ace68 | 1152 | ptr, sz); |
459b15d4 SL |
1153 | break; |
1154 | case EVP_CTRL_AEAD_TLS1_AAD: | |
0d2bfe52 | 1155 | /* This one does a set and a get - since it returns a size */ |
459b15d4 SL |
1156 | params[0] = |
1157 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1c3ace68 | 1158 | ptr, sz); |
7c14d0c1 | 1159 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
459b15d4 | 1160 | if (ret <= 0) |
6a36f209 | 1161 | goto end; |
459b15d4 SL |
1162 | params[0] = |
1163 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
7c14d0c1 | 1164 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
459b15d4 | 1165 | if (ret <= 0) |
6a36f209 | 1166 | goto end; |
459b15d4 | 1167 | return sz; |
f816aa47 SL |
1168 | #ifndef OPENSSL_NO_RC2 |
1169 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
1170 | set_params = 0; /* Fall thru */ | |
1171 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
1172 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz); | |
1173 | break; | |
1174 | #endif /* OPENSSL_NO_RC2 */ | |
0d2bfe52 SL |
1175 | #if !defined(OPENSSL_NO_MULTIBLOCK) |
1176 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE: | |
1177 | params[0] = OSSL_PARAM_construct_size_t( | |
1178 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz); | |
7c14d0c1 | 1179 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1180 | if (ret <= 0) |
1181 | return 0; | |
1182 | ||
1183 | params[0] = OSSL_PARAM_construct_size_t( | |
1184 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz); | |
1185 | params[1] = OSSL_PARAM_construct_end(); | |
7c14d0c1 | 1186 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1187 | if (ret <= 0) |
1188 | return 0; | |
1189 | return sz; | |
1190 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: { | |
1191 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1192 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1193 | ||
1194 | if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) | |
1195 | return 0; | |
1196 | ||
1197 | params[0] = OSSL_PARAM_construct_octet_string( | |
1198 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len); | |
1199 | params[1] = OSSL_PARAM_construct_uint( | |
1200 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
7c14d0c1 | 1201 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1202 | if (ret <= 0) |
1203 | return ret; | |
1204 | /* Retrieve the return values changed by the set */ | |
1205 | params[0] = OSSL_PARAM_construct_size_t( | |
1206 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz); | |
1207 | params[1] = OSSL_PARAM_construct_uint( | |
1208 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1209 | params[2] = OSSL_PARAM_construct_end(); | |
7c14d0c1 | 1210 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1211 | if (ret <= 0) |
1212 | return 0; | |
1213 | return sz; | |
1214 | } | |
1215 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: { | |
1216 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1217 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1218 | ||
1219 | params[0] = OSSL_PARAM_construct_octet_string( | |
1220 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len); | |
1221 | ||
1222 | params[1] = OSSL_PARAM_construct_octet_string( | |
1223 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp, | |
1224 | p->len); | |
1225 | params[2] = OSSL_PARAM_construct_uint( | |
1226 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
7c14d0c1 | 1227 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1228 | if (ret <= 0) |
1229 | return ret; | |
1230 | params[0] = OSSL_PARAM_construct_size_t( | |
1231 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz); | |
1232 | params[1] = OSSL_PARAM_construct_end(); | |
7c14d0c1 | 1233 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1234 | if (ret <= 0) |
1235 | return 0; | |
1236 | return sz; | |
1237 | } | |
1238 | #endif /* OPENSSL_NO_MULTIBLOCK */ | |
1239 | case EVP_CTRL_AEAD_SET_MAC_KEY: | |
1240 | if (arg < 0) | |
1241 | return -1; | |
1242 | params[0] = OSSL_PARAM_construct_octet_string( | |
1243 | OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz); | |
1244 | break; | |
13273237 | 1245 | } |
459b15d4 SL |
1246 | |
1247 | if (set_params) | |
7c14d0c1 | 1248 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
459b15d4 | 1249 | else |
7c14d0c1 | 1250 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
6a36f209 | 1251 | goto end; |
13273237 | 1252 | |
0be6cf0c | 1253 | /* Code below to be removed when legacy support is dropped. */ |
459b15d4 SL |
1254 | legacy: |
1255 | if (ctx->cipher->ctrl == NULL) { | |
9311d0c4 | 1256 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED); |
0f113f3e MC |
1257 | return 0; |
1258 | } | |
1259 | ||
1260 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
552be00d | 1261 | |
6a36f209 | 1262 | end: |
e870791a | 1263 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
9311d0c4 | 1264 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); |
0f113f3e MC |
1265 | return 0; |
1266 | } | |
1267 | return ret; | |
49528751 | 1268 | } |
216659eb | 1269 | |
ae3ff60e RL |
1270 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
1271 | { | |
1272 | if (cipher != NULL && cipher->get_params != NULL) | |
1273 | return cipher->get_params(params); | |
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1278 | { | |
70f39a48 P |
1279 | int r = 0; |
1280 | const OSSL_PARAM *p; | |
1281 | ||
b30b45b7 | 1282 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) { |
70f39a48 P |
1283 | r = ctx->cipher->set_ctx_params(ctx->algctx, params); |
1284 | if (r > 0) { | |
1285 | p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN); | |
b9a2f24e | 1286 | if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->key_len)) { |
70f39a48 | 1287 | r = 0; |
b9a2f24e HL |
1288 | ctx->key_len = -1; |
1289 | } | |
70f39a48 P |
1290 | } |
1291 | if (r > 0) { | |
1292 | p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN); | |
b9a2f24e | 1293 | if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->iv_len)) { |
70f39a48 | 1294 | r = 0; |
b9a2f24e HL |
1295 | ctx->iv_len = -1; |
1296 | } | |
70f39a48 | 1297 | } |
b30b45b7 | 1298 | } |
70f39a48 | 1299 | return r; |
ae3ff60e RL |
1300 | } |
1301 | ||
1302 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1303 | { | |
92d9d0ae | 1304 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
7c14d0c1 | 1305 | return ctx->cipher->get_ctx_params(ctx->algctx, params); |
ae3ff60e RL |
1306 | return 0; |
1307 | } | |
1308 | ||
1309 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1310 | { | |
1311 | if (cipher != NULL && cipher->gettable_params != NULL) | |
18ec26ba | 1312 | return cipher->gettable_params( |
ed576acd | 1313 | ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher))); |
ae3ff60e RL |
1314 | return NULL; |
1315 | } | |
1316 | ||
41f7ecf3 | 1317 | const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e | 1318 | { |
7c14d0c1 | 1319 | void *provctx; |
292b4184 P |
1320 | |
1321 | if (cipher != NULL && cipher->settable_ctx_params != NULL) { | |
ed576acd | 1322 | provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)); |
7c14d0c1 | 1323 | return cipher->settable_ctx_params(NULL, provctx); |
292b4184 | 1324 | } |
ae3ff60e RL |
1325 | return NULL; |
1326 | } | |
1327 | ||
41f7ecf3 | 1328 | const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e | 1329 | { |
7c14d0c1 | 1330 | void *provctx; |
292b4184 P |
1331 | |
1332 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) { | |
ed576acd | 1333 | provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)); |
7c14d0c1 | 1334 | return cipher->gettable_ctx_params(NULL, provctx); |
292b4184 P |
1335 | } |
1336 | return NULL; | |
1337 | } | |
1338 | ||
1339 | const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx) | |
1340 | { | |
1341 | void *alg; | |
1342 | ||
1343 | if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) { | |
ed576acd | 1344 | alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher)); |
7c14d0c1 | 1345 | return cctx->cipher->settable_ctx_params(cctx->algctx, alg); |
292b4184 P |
1346 | } |
1347 | return NULL; | |
1348 | } | |
1349 | ||
1350 | const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx) | |
1351 | { | |
7c14d0c1 | 1352 | void *provctx; |
292b4184 P |
1353 | |
1354 | if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) { | |
ed576acd | 1355 | provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher)); |
7c14d0c1 | 1356 | return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx); |
292b4184 | 1357 | } |
ae3ff60e RL |
1358 | return NULL; |
1359 | } | |
1360 | ||
11eef7e7 | 1361 | #ifndef FIPS_MODULE |
b4250010 | 1362 | static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx) |
11eef7e7 SL |
1363 | { |
1364 | const EVP_CIPHER *cipher = ctx->cipher; | |
1365 | const OSSL_PROVIDER *prov; | |
1366 | ||
1367 | if (cipher == NULL) | |
1368 | return NULL; | |
1369 | ||
ed576acd | 1370 | prov = EVP_CIPHER_get0_provider(cipher); |
a829b735 | 1371 | return ossl_provider_libctx(prov); |
11eef7e7 SL |
1372 | } |
1373 | #endif | |
1374 | ||
216659eb | 1375 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e MC |
1376 | { |
1377 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1378 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4a42e264 | 1379 | |
f844f9eb | 1380 | #ifdef FIPS_MODULE |
4a42e264 SL |
1381 | return 0; |
1382 | #else | |
1383 | { | |
1384 | int kl; | |
b4250010 | 1385 | OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx); |
4a42e264 | 1386 | |
ed576acd | 1387 | kl = EVP_CIPHER_CTX_get_key_length(ctx); |
5cbd2ea3 | 1388 | if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0) |
4a42e264 SL |
1389 | return 0; |
1390 | return 1; | |
1391 | } | |
f844f9eb | 1392 | #endif /* FIPS_MODULE */ |
0f113f3e | 1393 | } |
216659eb | 1394 | |
4e62f1a3 P |
1395 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX *in) |
1396 | { | |
1397 | EVP_CIPHER_CTX *out = EVP_CIPHER_CTX_new(); | |
1398 | ||
1399 | if (out != NULL && !EVP_CIPHER_CTX_copy(out, in)) { | |
1400 | EVP_CIPHER_CTX_free(out); | |
1401 | out = NULL; | |
1402 | } | |
1403 | return out; | |
1404 | } | |
1405 | ||
c2bf7208 | 1406 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1407 | { |
1408 | if ((in == NULL) || (in->cipher == NULL)) { | |
9311d0c4 | 1409 | ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED); |
0f113f3e MC |
1410 | return 0; |
1411 | } | |
df05f2ce MC |
1412 | |
1413 | if (in->cipher->prov == NULL) | |
1414 | goto legacy; | |
1415 | ||
1416 | if (in->cipher->dupctx == NULL) { | |
9311d0c4 | 1417 | ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
df05f2ce MC |
1418 | return 0; |
1419 | } | |
1420 | ||
1421 | EVP_CIPHER_CTX_reset(out); | |
1422 | ||
1423 | *out = *in; | |
7c14d0c1 | 1424 | out->algctx = NULL; |
df05f2ce | 1425 | |
70c35fd1 | 1426 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1427 | out->fetched_cipher = NULL; |
1428 | return 0; | |
1429 | } | |
1430 | ||
7c14d0c1 SL |
1431 | out->algctx = in->cipher->dupctx(in->algctx); |
1432 | if (out->algctx == NULL) { | |
9311d0c4 | 1433 | ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
df05f2ce MC |
1434 | return 0; |
1435 | } | |
1436 | ||
1437 | return 1; | |
1438 | ||
0be6cf0c | 1439 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
1440 | legacy: |
1441 | ||
f844f9eb | 1442 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
1443 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1444 | if (in->engine && !ENGINE_init(in->engine)) { | |
9311d0c4 | 1445 | ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB); |
0f113f3e MC |
1446 | return 0; |
1447 | } | |
c2bf7208 DSH |
1448 | #endif |
1449 | ||
c0ca39bd | 1450 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1451 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1452 | |
1453 | if (in->cipher_data && in->cipher->ctx_size) { | |
1454 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1455 | if (out->cipher_data == NULL) { |
273a0218 | 1456 | out->cipher = NULL; |
9311d0c4 | 1457 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1458 | return 0; |
1459 | } | |
1460 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1461 | } | |
1462 | ||
1463 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1464 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1465 | out->cipher = NULL; | |
9311d0c4 | 1466 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
273a0218 BE |
1467 | return 0; |
1468 | } | |
0f113f3e MC |
1469 | return 1; |
1470 | } | |
df05f2ce | 1471 | |
550f974a RL |
1472 | EVP_CIPHER *evp_cipher_new(void) |
1473 | { | |
1474 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1475 | ||
1476 | if (cipher != NULL) { | |
1477 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1478 | if (cipher->lock == NULL) { | |
1479 | OPENSSL_free(cipher); | |
1480 | return NULL; | |
1481 | } | |
1482 | cipher->refcnt = 1; | |
1483 | } | |
1484 | return cipher; | |
1485 | } | |
1486 | ||
32040838 RL |
1487 | /* |
1488 | * FIPS module note: since internal fetches will be entirely | |
1489 | * provider based, we know that none of its code depends on legacy | |
1490 | * NIDs or any functionality that use them. | |
1491 | */ | |
f844f9eb | 1492 | #ifndef FIPS_MODULE |
83abd33c | 1493 | /* After removal of legacy support get rid of the need for legacy NIDs */ |
32040838 RL |
1494 | static void set_legacy_nid(const char *name, void *vlegacy_nid) |
1495 | { | |
1496 | int nid; | |
1497 | int *legacy_nid = vlegacy_nid; | |
6a835fcf RL |
1498 | /* |
1499 | * We use lowest level function to get the associated method, because | |
1500 | * higher level functions such as EVP_get_cipherbyname() have changed | |
1501 | * to look at providers too. | |
1502 | */ | |
1503 | const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH); | |
32040838 RL |
1504 | |
1505 | if (*legacy_nid == -1) /* We found a clash already */ | |
1506 | return; | |
6a835fcf | 1507 | if (legacy_method == NULL) |
32040838 | 1508 | return; |
ed576acd | 1509 | nid = EVP_CIPHER_get_nid(legacy_method); |
32040838 RL |
1510 | if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
1511 | *legacy_nid = -1; | |
1512 | return; | |
1513 | } | |
1514 | *legacy_nid = nid; | |
1515 | } | |
1516 | #endif | |
1517 | ||
309a78aa RL |
1518 | static void *evp_cipher_from_algorithm(const int name_id, |
1519 | const OSSL_ALGORITHM *algodef, | |
1520 | OSSL_PROVIDER *prov) | |
df05f2ce | 1521 | { |
309a78aa | 1522 | const OSSL_DISPATCH *fns = algodef->implementation; |
df05f2ce MC |
1523 | EVP_CIPHER *cipher = NULL; |
1524 | int fnciphcnt = 0, fnctxcnt = 0; | |
1525 | ||
f7c16d48 | 1526 | if ((cipher = evp_cipher_new()) == NULL) { |
9311d0c4 | 1527 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
df05f2ce | 1528 | return NULL; |
6b9e3724 | 1529 | } |
df05f2ce | 1530 | |
f844f9eb | 1531 | #ifndef FIPS_MODULE |
32040838 | 1532 | cipher->nid = NID_undef; |
d84f5515 MC |
1533 | if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid) |
1534 | || cipher->nid == -1) { | |
32040838 RL |
1535 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); |
1536 | EVP_CIPHER_free(cipher); | |
1537 | return NULL; | |
f7c16d48 | 1538 | } |
ed71e917 MC |
1539 | #endif |
1540 | ||
32040838 | 1541 | cipher->name_id = name_id; |
6c9bc258 TM |
1542 | if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) { |
1543 | EVP_CIPHER_free(cipher); | |
1544 | return NULL; | |
1545 | } | |
309a78aa | 1546 | cipher->description = algodef->algorithm_description; |
32040838 | 1547 | |
df05f2ce MC |
1548 | for (; fns->function_id != 0; fns++) { |
1549 | switch (fns->function_id) { | |
1550 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1551 | if (cipher->newctx != NULL) | |
1552 | break; | |
363b1e5d | 1553 | cipher->newctx = OSSL_FUNC_cipher_newctx(fns); |
df05f2ce MC |
1554 | fnctxcnt++; |
1555 | break; | |
1556 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1557 | if (cipher->einit != NULL) | |
1558 | break; | |
363b1e5d | 1559 | cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns); |
df05f2ce MC |
1560 | fnciphcnt++; |
1561 | break; | |
1562 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1563 | if (cipher->dinit != NULL) | |
1564 | break; | |
363b1e5d | 1565 | cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns); |
df05f2ce MC |
1566 | fnciphcnt++; |
1567 | break; | |
1568 | case OSSL_FUNC_CIPHER_UPDATE: | |
1569 | if (cipher->cupdate != NULL) | |
1570 | break; | |
363b1e5d | 1571 | cipher->cupdate = OSSL_FUNC_cipher_update(fns); |
df05f2ce MC |
1572 | fnciphcnt++; |
1573 | break; | |
1574 | case OSSL_FUNC_CIPHER_FINAL: | |
1575 | if (cipher->cfinal != NULL) | |
1576 | break; | |
363b1e5d | 1577 | cipher->cfinal = OSSL_FUNC_cipher_final(fns); |
df05f2ce MC |
1578 | fnciphcnt++; |
1579 | break; | |
718b133a MC |
1580 | case OSSL_FUNC_CIPHER_CIPHER: |
1581 | if (cipher->ccipher != NULL) | |
1582 | break; | |
363b1e5d | 1583 | cipher->ccipher = OSSL_FUNC_cipher_cipher(fns); |
718b133a | 1584 | break; |
df05f2ce MC |
1585 | case OSSL_FUNC_CIPHER_FREECTX: |
1586 | if (cipher->freectx != NULL) | |
1587 | break; | |
363b1e5d | 1588 | cipher->freectx = OSSL_FUNC_cipher_freectx(fns); |
df05f2ce MC |
1589 | fnctxcnt++; |
1590 | break; | |
1591 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1592 | if (cipher->dupctx != NULL) | |
1593 | break; | |
363b1e5d | 1594 | cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns); |
df05f2ce | 1595 | break; |
df05f2ce MC |
1596 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1597 | if (cipher->get_params != NULL) | |
1598 | break; | |
363b1e5d | 1599 | cipher->get_params = OSSL_FUNC_cipher_get_params(fns); |
df05f2ce | 1600 | break; |
92d9d0ae RL |
1601 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
1602 | if (cipher->get_ctx_params != NULL) | |
718b133a | 1603 | break; |
363b1e5d | 1604 | cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns); |
718b133a | 1605 | break; |
92d9d0ae RL |
1606 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
1607 | if (cipher->set_ctx_params != NULL) | |
df05f2ce | 1608 | break; |
363b1e5d | 1609 | cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns); |
df05f2ce | 1610 | break; |
ae3ff60e RL |
1611 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
1612 | if (cipher->gettable_params != NULL) | |
1613 | break; | |
363b1e5d | 1614 | cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns); |
ae3ff60e RL |
1615 | break; |
1616 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1617 | if (cipher->gettable_ctx_params != NULL) | |
1618 | break; | |
1619 | cipher->gettable_ctx_params = | |
363b1e5d | 1620 | OSSL_FUNC_cipher_gettable_ctx_params(fns); |
ae3ff60e RL |
1621 | break; |
1622 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1623 | if (cipher->settable_ctx_params != NULL) | |
1624 | break; | |
1625 | cipher->settable_ctx_params = | |
363b1e5d | 1626 | OSSL_FUNC_cipher_settable_ctx_params(fns); |
ae3ff60e | 1627 | break; |
df05f2ce MC |
1628 | } |
1629 | } | |
718b133a MC |
1630 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1631 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1632 | || fnctxcnt != 2) { |
df05f2ce MC |
1633 | /* |
1634 | * In order to be a consistent set of functions we must have at least | |
1635 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1636 | * functions, or a single "cipher" function. In all cases we need both |
1637 | * the "newctx" and "freectx" functions. | |
df05f2ce | 1638 | */ |
550f974a | 1639 | EVP_CIPHER_free(cipher); |
9311d0c4 | 1640 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
df05f2ce MC |
1641 | return NULL; |
1642 | } | |
1643 | cipher->prov = prov; | |
1644 | if (prov != NULL) | |
7c95390e | 1645 | ossl_provider_up_ref(prov); |
df05f2ce | 1646 | |
ae69da05 MC |
1647 | if (!evp_cipher_cache_constants(cipher)) { |
1648 | EVP_CIPHER_free(cipher); | |
1649 | ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED); | |
1650 | cipher = NULL; | |
1651 | } | |
1652 | ||
df05f2ce MC |
1653 | return cipher; |
1654 | } | |
1655 | ||
70c35fd1 | 1656 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1657 | { |
70c35fd1 | 1658 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1659 | } |
1660 | ||
1661 | static void evp_cipher_free(void *cipher) | |
1662 | { | |
550f974a | 1663 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1664 | } |
1665 | ||
b4250010 | 1666 | EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, |
df05f2ce MC |
1667 | const char *properties) |
1668 | { | |
0211740f RL |
1669 | EVP_CIPHER *cipher = |
1670 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
309a78aa | 1671 | evp_cipher_from_algorithm, evp_cipher_up_ref, |
0211740f RL |
1672 | evp_cipher_free); |
1673 | ||
0211740f | 1674 | return cipher; |
df05f2ce | 1675 | } |
c540f00f | 1676 | |
550f974a RL |
1677 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
1678 | { | |
1679 | int ref = 0; | |
1680 | ||
f6c95e46 RS |
1681 | if (cipher->origin == EVP_ORIG_DYNAMIC) |
1682 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
550f974a RL |
1683 | return 1; |
1684 | } | |
1685 | ||
f6c95e46 RS |
1686 | void evp_cipher_free_int(EVP_CIPHER *cipher) |
1687 | { | |
6c9bc258 | 1688 | OPENSSL_free(cipher->type_name); |
f6c95e46 RS |
1689 | ossl_provider_free(cipher->prov); |
1690 | CRYPTO_THREAD_lock_free(cipher->lock); | |
1691 | OPENSSL_free(cipher); | |
1692 | } | |
1693 | ||
550f974a RL |
1694 | void EVP_CIPHER_free(EVP_CIPHER *cipher) |
1695 | { | |
1696 | int i; | |
1697 | ||
f6c95e46 | 1698 | if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC) |
550f974a RL |
1699 | return; |
1700 | ||
1701 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1702 | if (i > 0) | |
1703 | return; | |
f6c95e46 | 1704 | evp_cipher_free_int(cipher); |
550f974a RL |
1705 | } |
1706 | ||
b4250010 | 1707 | void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx, |
251e610c RL |
1708 | void (*fn)(EVP_CIPHER *mac, void *arg), |
1709 | void *arg) | |
c540f00f RL |
1710 | { |
1711 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1712 | (void (*)(void *, void *))fn, arg, | |
cd770738 RL |
1713 | evp_cipher_from_algorithm, evp_cipher_up_ref, |
1714 | evp_cipher_free); | |
c540f00f | 1715 | } |