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Commit | Line | Data |
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62867571 | 1 | /* |
a28d06f3 | 2 | * Copyright 1995-2021 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> |
3c27208f | 19 | #include <openssl/engine.h> |
df05f2ce MC |
20 | #include <openssl/params.h> |
21 | #include <openssl/core_names.h> | |
6c9bc258 | 22 | #include "internal/cryptlib.h" |
df05f2ce | 23 | #include "internal/provider.h" |
6c9bc258 TM |
24 | #include "internal/core.h" |
25 | #include "crypto/evp.h" | |
706457b7 | 26 | #include "evp_local.h" |
d02b48c6 | 27 | |
df05f2ce | 28 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) |
0f113f3e | 29 | { |
df05f2ce | 30 | if (ctx == NULL) |
8baf9968 | 31 | return 1; |
df05f2ce MC |
32 | |
33 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) | |
34 | goto legacy; | |
35 | ||
7c14d0c1 | 36 | if (ctx->algctx != NULL) { |
df05f2ce | 37 | if (ctx->cipher->freectx != NULL) |
7c14d0c1 SL |
38 | ctx->cipher->freectx(ctx->algctx); |
39 | ctx->algctx = NULL; | |
df05f2ce MC |
40 | } |
41 | if (ctx->fetched_cipher != NULL) | |
550f974a | 42 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
43 | memset(ctx, 0, sizeof(*ctx)); |
44 | ||
45 | return 1; | |
46 | ||
0be6cf0c | 47 | /* Remove legacy code below when legacy support is removed. */ |
df05f2ce MC |
48 | legacy: |
49 | ||
50 | if (ctx->cipher != NULL) { | |
51 | if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) | |
8baf9968 RL |
52 | return 0; |
53 | /* Cleanse cipher context data */ | |
df05f2ce MC |
54 | if (ctx->cipher_data && ctx->cipher->ctx_size) |
55 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
8baf9968 | 56 | } |
df05f2ce | 57 | OPENSSL_free(ctx->cipher_data); |
f844f9eb | 58 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 59 | ENGINE_finish(ctx->engine); |
8baf9968 | 60 | #endif |
df05f2ce | 61 | memset(ctx, 0, sizeof(*ctx)); |
8baf9968 | 62 | return 1; |
0f113f3e | 63 | } |
d02b48c6 | 64 | |
b40228a6 | 65 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) |
0f113f3e | 66 | { |
8baf9968 RL |
67 | return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX)); |
68 | } | |
69 | ||
70 | void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) | |
71 | { | |
543e740b RS |
72 | if (ctx == NULL) |
73 | return; | |
8baf9968 RL |
74 | EVP_CIPHER_CTX_reset(ctx); |
75 | OPENSSL_free(ctx); | |
0f113f3e | 76 | } |
581f1c84 | 77 | |
4b58d9b4 P |
78 | static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx, |
79 | const EVP_CIPHER *cipher, | |
80 | ENGINE *impl, const unsigned char *key, | |
81 | const unsigned char *iv, int enc, | |
82 | const OSSL_PARAM params[]) | |
0f113f3e | 83 | { |
c12bf350 | 84 | int n; |
f844f9eb | 85 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 86 | ENGINE *tmpimpl = NULL; |
319e518a | 87 | #endif |
df05f2ce MC |
88 | /* |
89 | * enc == 1 means we are encrypting. | |
90 | * enc == 0 means we are decrypting. | |
91 | * enc == -1 means, use the previously initialised value for encrypt/decrypt | |
92 | */ | |
93 | if (enc == -1) { | |
0f113f3e | 94 | enc = ctx->encrypt; |
df05f2ce | 95 | } else { |
0f113f3e MC |
96 | if (enc) |
97 | enc = 1; | |
98 | ctx->encrypt = enc; | |
99 | } | |
df05f2ce MC |
100 | |
101 | if (cipher == NULL && ctx->cipher == NULL) { | |
9311d0c4 | 102 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
df05f2ce MC |
103 | return 0; |
104 | } | |
105 | ||
0be6cf0c | 106 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce | 107 | |
f844f9eb | 108 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
109 | /* |
110 | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so | |
111 | * this context may already have an ENGINE! Try to avoid releasing the | |
112 | * previous handle, re-querying for an ENGINE, and having a | |
0d4fb843 | 113 | * reinitialisation, when it may all be unnecessary. |
0f113f3e | 114 | */ |
f6b94279 | 115 | if (ctx->engine && ctx->cipher |
a7f9e0a4 | 116 | && (cipher == NULL || cipher->nid == ctx->cipher->nid)) |
0f113f3e | 117 | goto skip_to_init; |
df05f2ce MC |
118 | |
119 | if (cipher != NULL && impl == NULL) { | |
120 | /* Ask if an ENGINE is reserved for this job */ | |
121 | tmpimpl = ENGINE_get_cipher_engine(cipher->nid); | |
122 | } | |
0b13e9f0 | 123 | #endif |
df05f2ce MC |
124 | |
125 | /* | |
126 | * If there are engines involved then we should use legacy handling for now. | |
127 | */ | |
128 | if (ctx->engine != NULL | |
f844f9eb | 129 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
319e518a MC |
130 | || tmpimpl != NULL |
131 | #endif | |
132 | || impl != NULL) { | |
df05f2ce MC |
133 | if (ctx->cipher == ctx->fetched_cipher) |
134 | ctx->cipher = NULL; | |
550f974a | 135 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
136 | ctx->fetched_cipher = NULL; |
137 | goto legacy; | |
138 | } | |
df05f2ce MC |
139 | /* |
140 | * Ensure a context left lying around from last time is cleared | |
141 | * (legacy code) | |
142 | */ | |
143 | if (cipher != NULL && ctx->cipher != NULL) { | |
144 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
145 | ctx->cipher_data = NULL; | |
146 | } | |
147 | ||
148 | ||
0be6cf0c | 149 | /* Start of non-legacy code below */ |
df05f2ce MC |
150 | |
151 | /* Ensure a context left lying around from last time is cleared */ | |
152 | if (cipher != NULL && ctx->cipher != NULL) { | |
153 | unsigned long flags = ctx->flags; | |
154 | ||
155 | EVP_CIPHER_CTX_reset(ctx); | |
156 | /* Restore encrypt and flags */ | |
157 | ctx->encrypt = enc; | |
158 | ctx->flags = flags; | |
159 | } | |
160 | ||
7f612b1f | 161 | if (cipher == NULL) |
df05f2ce MC |
162 | cipher = ctx->cipher; |
163 | ||
164 | if (cipher->prov == NULL) { | |
f844f9eb | 165 | #ifdef FIPS_MODULE |
79c44b4e | 166 | /* We only do explicit fetches inside the FIPS module */ |
9311d0c4 | 167 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
319e518a MC |
168 | return 0; |
169 | #else | |
170 | EVP_CIPHER *provciph = | |
068489a2 MC |
171 | EVP_CIPHER_fetch(NULL, |
172 | cipher->nid == NID_undef ? "NULL" | |
173 | : OBJ_nid2sn(cipher->nid), | |
174 | ""); | |
319e518a | 175 | |
ec0ce188 | 176 | if (provciph == NULL) |
df05f2ce | 177 | return 0; |
df05f2ce | 178 | cipher = provciph; |
550f974a | 179 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 180 | ctx->fetched_cipher = provciph; |
319e518a | 181 | #endif |
df05f2ce MC |
182 | } |
183 | ||
aea01d13 P |
184 | if (cipher->prov != NULL) { |
185 | if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) { | |
186 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
187 | return 0; | |
188 | } | |
189 | EVP_CIPHER_free(ctx->fetched_cipher); | |
190 | ctx->fetched_cipher = (EVP_CIPHER *)cipher; | |
191 | } | |
df05f2ce | 192 | ctx->cipher = cipher; |
7c14d0c1 SL |
193 | if (ctx->algctx == NULL) { |
194 | ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); | |
195 | if (ctx->algctx == NULL) { | |
9311d0c4 | 196 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
197 | return 0; |
198 | } | |
199 | } | |
200 | ||
201 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 202 | /* |
df05f2ce MC |
203 | * If this ctx was already set up for no padding then we need to tell |
204 | * the new cipher about it. | |
205 | */ | |
206 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
207 | return 0; | |
208 | } | |
209 | ||
210 | if (enc) { | |
211 | if (ctx->cipher->einit == NULL) { | |
9311d0c4 | 212 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
213 | return 0; |
214 | } | |
215 | ||
7c14d0c1 | 216 | return ctx->cipher->einit(ctx->algctx, |
344cfa34 | 217 | key, |
33b40a10 | 218 | key == NULL ? 0 |
ed576acd | 219 | : EVP_CIPHER_CTX_get_key_length(ctx), |
344cfa34 | 220 | iv, |
33b40a10 | 221 | iv == NULL ? 0 |
ed576acd | 222 | : EVP_CIPHER_CTX_get_iv_length(ctx), |
4b58d9b4 | 223 | params); |
df05f2ce MC |
224 | } |
225 | ||
226 | if (ctx->cipher->dinit == NULL) { | |
9311d0c4 | 227 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
228 | return 0; |
229 | } | |
230 | ||
7c14d0c1 | 231 | return ctx->cipher->dinit(ctx->algctx, |
344cfa34 | 232 | key, |
33b40a10 | 233 | key == NULL ? 0 |
ed576acd | 234 | : EVP_CIPHER_CTX_get_key_length(ctx), |
344cfa34 | 235 | iv, |
33b40a10 | 236 | iv == NULL ? 0 |
ed576acd | 237 | : EVP_CIPHER_CTX_get_iv_length(ctx), |
4b58d9b4 | 238 | params); |
df05f2ce | 239 | |
0be6cf0c | 240 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
241 | legacy: |
242 | ||
243 | if (cipher != NULL) { | |
244 | /* | |
245 | * Ensure a context left lying around from last time is cleared (we | |
246 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
247 | * EVP_CIPHER could be used). |
248 | */ | |
249 | if (ctx->cipher) { | |
250 | unsigned long flags = ctx->flags; | |
c0ca39bd | 251 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
252 | /* Restore encrypt and flags */ |
253 | ctx->encrypt = enc; | |
254 | ctx->flags = flags; | |
255 | } | |
f844f9eb | 256 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 257 | if (impl != NULL) { |
0f113f3e | 258 | if (!ENGINE_init(impl)) { |
9311d0c4 | 259 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
260 | return 0; |
261 | } | |
df05f2ce MC |
262 | } else { |
263 | impl = tmpimpl; | |
264 | } | |
265 | if (impl != NULL) { | |
0f113f3e MC |
266 | /* There's an ENGINE for this job ... (apparently) */ |
267 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
268 | |
269 | if (c == NULL) { | |
0f113f3e MC |
270 | /* |
271 | * One positive side-effect of US's export control history, | |
272 | * is that we should at least be able to avoid using US | |
0d4fb843 | 273 | * misspellings of "initialisation"? |
0f113f3e | 274 | */ |
9311d0c4 | 275 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
276 | return 0; |
277 | } | |
278 | /* We'll use the ENGINE's private cipher definition */ | |
279 | cipher = c; | |
280 | /* | |
281 | * Store the ENGINE functional reference so we know 'cipher' came | |
282 | * from an ENGINE and we need to release it when done. | |
283 | */ | |
284 | ctx->engine = impl; | |
df05f2ce | 285 | } else { |
0f113f3e | 286 | ctx->engine = NULL; |
df05f2ce | 287 | } |
0b13e9f0 | 288 | #endif |
544a2aea | 289 | |
0f113f3e MC |
290 | ctx->cipher = cipher; |
291 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 292 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 293 | if (ctx->cipher_data == NULL) { |
273a0218 | 294 | ctx->cipher = NULL; |
9311d0c4 | 295 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
296 | return 0; |
297 | } | |
298 | } else { | |
299 | ctx->cipher_data = NULL; | |
300 | } | |
301 | ctx->key_len = cipher->key_len; | |
302 | /* Preserve wrap enable flag, zero everything else */ | |
303 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
304 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
305 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 306 | ctx->cipher = NULL; |
9311d0c4 | 307 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
308 | return 0; |
309 | } | |
310 | } | |
0f113f3e | 311 | } |
f844f9eb | 312 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e | 313 | skip_to_init: |
0b13e9f0 | 314 | #endif |
1702c500 P |
315 | if (ctx->cipher == NULL) |
316 | return 0; | |
317 | ||
0f113f3e MC |
318 | /* we assume block size is a power of 2 in *cryptUpdate */ |
319 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
320 | || ctx->cipher->block_size == 8 | |
321 | || ctx->cipher->block_size == 16); | |
322 | ||
323 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
ed576acd | 324 | && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) { |
9311d0c4 | 325 | ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED); |
0f113f3e MC |
326 | return 0; |
327 | } | |
328 | ||
ed576acd | 329 | if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx)) |
f6c95e46 | 330 | & EVP_CIPH_CUSTOM_IV) == 0) { |
ed576acd | 331 | switch (EVP_CIPHER_CTX_get_mode(ctx)) { |
0f113f3e MC |
332 | |
333 | case EVP_CIPH_STREAM_CIPHER: | |
334 | case EVP_CIPH_ECB_MODE: | |
335 | break; | |
336 | ||
337 | case EVP_CIPH_CFB_MODE: | |
338 | case EVP_CIPH_OFB_MODE: | |
339 | ||
340 | ctx->num = 0; | |
341 | /* fall-through */ | |
342 | ||
343 | case EVP_CIPH_CBC_MODE: | |
ed576acd | 344 | n = EVP_CIPHER_CTX_get_iv_length(ctx); |
c12bf350 P |
345 | if (!ossl_assert(n >= 0 && n <= (int)sizeof(ctx->iv))) |
346 | return 0; | |
cec8854c | 347 | if (iv != NULL) |
69807ab8 P |
348 | memcpy(ctx->oiv, iv, n); |
349 | memcpy(ctx->iv, ctx->oiv, n); | |
0f113f3e MC |
350 | break; |
351 | ||
352 | case EVP_CIPH_CTR_MODE: | |
353 | ctx->num = 0; | |
354 | /* Don't reuse IV for CTR mode */ | |
cec8854c P |
355 | if (iv != NULL) { |
356 | if ((n = EVP_CIPHER_CTX_get_iv_length(ctx)) <= 0) | |
357 | return 0; | |
358 | memcpy(ctx->iv, iv, n); | |
359 | } | |
0f113f3e MC |
360 | break; |
361 | ||
362 | default: | |
363 | return 0; | |
0f113f3e MC |
364 | } |
365 | } | |
366 | ||
cec8854c | 367 | if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { |
0f113f3e MC |
368 | if (!ctx->cipher->init(ctx, key, iv, enc)) |
369 | return 0; | |
370 | } | |
371 | ctx->buf_len = 0; | |
372 | ctx->final_used = 0; | |
373 | ctx->block_mask = ctx->cipher->block_size - 1; | |
374 | return 1; | |
375 | } | |
d02b48c6 | 376 | |
4b58d9b4 P |
377 | int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
378 | const unsigned char *key, const unsigned char *iv, | |
379 | int enc, const OSSL_PARAM params[]) | |
380 | { | |
381 | return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params); | |
382 | } | |
383 | ||
384 | int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
385 | const unsigned char *key, const unsigned char *iv, int enc) | |
386 | { | |
387 | if (cipher != NULL) | |
388 | EVP_CIPHER_CTX_reset(ctx); | |
389 | return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL); | |
390 | } | |
391 | ||
392 | int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
393 | ENGINE *impl, const unsigned char *key, | |
394 | const unsigned char *iv, int enc) | |
395 | { | |
396 | return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL); | |
397 | } | |
398 | ||
be06a934 | 399 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
400 | const unsigned char *in, int inl) |
401 | { | |
402 | if (ctx->encrypt) | |
403 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
404 | else | |
405 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
406 | } | |
d02b48c6 | 407 | |
581f1c84 | 408 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
409 | { |
410 | if (ctx->encrypt) | |
411 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
412 | else | |
413 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
414 | } | |
581f1c84 | 415 | |
6b691a5c | 416 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
417 | { |
418 | if (ctx->encrypt) | |
419 | return EVP_EncryptFinal(ctx, out, outl); | |
420 | else | |
421 | return EVP_DecryptFinal(ctx, out, outl); | |
422 | } | |
d02b48c6 | 423 | |
be06a934 | 424 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
425 | const unsigned char *key, const unsigned char *iv) |
426 | { | |
427 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
428 | } | |
18eda732 | 429 | |
0f113f3e MC |
430 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
431 | ENGINE *impl, const unsigned char *key, | |
432 | const unsigned char *iv) | |
433 | { | |
434 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
435 | } | |
d02b48c6 | 436 | |
4b58d9b4 P |
437 | int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
438 | const unsigned char *key, const unsigned char *iv, | |
439 | const OSSL_PARAM params[]) | |
440 | { | |
441 | return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params); | |
442 | } | |
443 | ||
be06a934 | 444 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
445 | const unsigned char *key, const unsigned char *iv) |
446 | { | |
447 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
448 | } | |
18eda732 | 449 | |
0f113f3e MC |
450 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
451 | ENGINE *impl, const unsigned char *key, | |
452 | const unsigned char *iv) | |
453 | { | |
454 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
455 | } | |
d02b48c6 | 456 | |
4b58d9b4 P |
457 | int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
458 | const unsigned char *key, const unsigned char *iv, | |
459 | const OSSL_PARAM params[]) | |
460 | { | |
461 | return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params); | |
462 | } | |
463 | ||
c3a73daf AP |
464 | /* |
465 | * According to the letter of standard difference between pointers | |
466 | * is specified to be valid only within same object. This makes | |
467 | * it formally challenging to determine if input and output buffers | |
468 | * are not partially overlapping with standard pointer arithmetic. | |
469 | */ | |
470 | #ifdef PTRDIFF_T | |
471 | # undef PTRDIFF_T | |
472 | #endif | |
473 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
474 | /* | |
475 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
476 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
477 | * difference between two pointers might be truncated to 32 bits. | |
478 | * In the context one can even wonder how comparison for | |
479 | * equality is implemented. To be on the safe side we adhere to | |
480 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
481 | */ |
482 | # define PTRDIFF_T uint64_t | |
483 | #else | |
484 | # define PTRDIFF_T size_t | |
485 | #endif | |
486 | ||
6d777689 | 487 | int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
488 | { |
489 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
490 | /* | |
491 | * Check for partially overlapping buffers. [Binary logical | |
492 | * operations are used instead of boolean to minimize number | |
493 | * of conditional branches.] | |
494 | */ | |
83151b73 AP |
495 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
496 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 497 | |
83151b73 | 498 | return overlapped; |
c3a73daf AP |
499 | } |
500 | ||
a8bf2f8f RL |
501 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
502 | unsigned char *out, int *outl, | |
503 | const unsigned char *in, int inl) | |
0f113f3e | 504 | { |
64846096 LP |
505 | int i, j, bl, cmpl = inl; |
506 | ||
507 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
508 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 509 | |
7141ba31 MC |
510 | bl = ctx->cipher->block_size; |
511 | ||
0f113f3e | 512 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 513 | /* If block size > 1 then the cipher will have to do this check */ |
6d777689 | 514 | if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { |
9311d0c4 | 515 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 516 | return 0; |
83151b73 | 517 | } |
5fc77684 | 518 | |
0f113f3e MC |
519 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
520 | if (i < 0) | |
521 | return 0; | |
522 | else | |
523 | *outl = i; | |
524 | return 1; | |
525 | } | |
526 | ||
2c236894 MC |
527 | if (inl <= 0) { |
528 | *outl = 0; | |
529 | return inl == 0; | |
530 | } | |
6d777689 | 531 | if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
9311d0c4 | 532 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 533 | return 0; |
83151b73 | 534 | } |
0f113f3e MC |
535 | |
536 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
537 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
538 | *outl = inl; | |
539 | return 1; | |
540 | } else { | |
541 | *outl = 0; | |
542 | return 0; | |
543 | } | |
544 | } | |
545 | i = ctx->buf_len; | |
0f113f3e MC |
546 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
547 | if (i != 0) { | |
3f358213 | 548 | if (bl - i > inl) { |
0f113f3e MC |
549 | memcpy(&(ctx->buf[i]), in, inl); |
550 | ctx->buf_len += inl; | |
551 | *outl = 0; | |
552 | return 1; | |
553 | } else { | |
554 | j = bl - i; | |
c9fb704c MC |
555 | |
556 | /* | |
557 | * Once we've processed the first j bytes from in, the amount of | |
558 | * data left that is a multiple of the block length is: | |
559 | * (inl - j) & ~(bl - 1) | |
560 | * We must ensure that this amount of data, plus the one block that | |
561 | * we process from ctx->buf does not exceed INT_MAX | |
562 | */ | |
563 | if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) { | |
564 | ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); | |
565 | return 0; | |
566 | } | |
0f113f3e | 567 | memcpy(&(ctx->buf[i]), in, j); |
0f113f3e MC |
568 | inl -= j; |
569 | in += j; | |
5fc77684 AP |
570 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
571 | return 0; | |
0f113f3e MC |
572 | out += bl; |
573 | *outl = bl; | |
574 | } | |
575 | } else | |
576 | *outl = 0; | |
577 | i = inl & (bl - 1); | |
578 | inl -= i; | |
579 | if (inl > 0) { | |
580 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
581 | return 0; | |
582 | *outl += inl; | |
583 | } | |
584 | ||
585 | if (i != 0) | |
586 | memcpy(ctx->buf, &(in[inl]), i); | |
587 | ctx->buf_len = i; | |
588 | return 1; | |
589 | } | |
d02b48c6 | 590 | |
a8bf2f8f RL |
591 | |
592 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
593 | const unsigned char *in, int inl) | |
594 | { | |
df05f2ce MC |
595 | int ret; |
596 | size_t soutl; | |
3b94944c | 597 | int blocksize; |
df05f2ce | 598 | |
3d4c81b0 | 599 | if (outl != NULL) { |
600 | *outl = 0; | |
601 | } else { | |
9311d0c4 | 602 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 603 | return 0; |
604 | } | |
605 | ||
a8bf2f8f RL |
606 | /* Prevent accidental use of decryption context when encrypting */ |
607 | if (!ctx->encrypt) { | |
9311d0c4 | 608 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
609 | return 0; |
610 | } | |
611 | ||
d4d89a07 | 612 | if (ctx->cipher == NULL) { |
9311d0c4 | 613 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d4d89a07 SS |
614 | return 0; |
615 | } | |
616 | ||
617 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
618 | goto legacy; |
619 | ||
30af356d | 620 | blocksize = ctx->cipher->block_size; |
3b94944c MC |
621 | |
622 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
9311d0c4 | 623 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
624 | return 0; |
625 | } | |
7c14d0c1 | 626 | ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl, |
3b94944c MC |
627 | inl + (blocksize == 1 ? 0 : blocksize), in, |
628 | (size_t)inl); | |
df05f2ce | 629 | |
36e619d7 GV |
630 | if (ret) { |
631 | if (soutl > INT_MAX) { | |
9311d0c4 | 632 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
36e619d7 GV |
633 | return 0; |
634 | } | |
635 | *outl = soutl; | |
df05f2ce | 636 | } |
36e619d7 | 637 | |
df05f2ce MC |
638 | return ret; |
639 | ||
0be6cf0c | 640 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
641 | legacy: |
642 | ||
a8bf2f8f RL |
643 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
644 | } | |
645 | ||
be06a934 | 646 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
647 | { |
648 | int ret; | |
649 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
650 | return ret; | |
651 | } | |
581f1c84 DSH |
652 | |
653 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
654 | { |
655 | int n, ret; | |
656 | unsigned int i, b, bl; | |
df05f2ce | 657 | size_t soutl; |
3b94944c | 658 | int blocksize; |
0f113f3e | 659 | |
3d4c81b0 | 660 | if (outl != NULL) { |
661 | *outl = 0; | |
662 | } else { | |
9311d0c4 | 663 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 664 | return 0; |
665 | } | |
666 | ||
a8bf2f8f RL |
667 | /* Prevent accidental use of decryption context when encrypting */ |
668 | if (!ctx->encrypt) { | |
9311d0c4 | 669 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
670 | return 0; |
671 | } | |
672 | ||
4894dcad | 673 | if (ctx->cipher == NULL) { |
9311d0c4 | 674 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
4894dcad P |
675 | return 0; |
676 | } | |
677 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
678 | goto legacy; |
679 | ||
ed576acd | 680 | blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
3b94944c MC |
681 | |
682 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
9311d0c4 | 683 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
684 | return 0; |
685 | } | |
686 | ||
7c14d0c1 | 687 | ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl, |
3b94944c | 688 | blocksize == 1 ? 0 : blocksize); |
df05f2ce | 689 | |
36e619d7 GV |
690 | if (ret) { |
691 | if (soutl > INT_MAX) { | |
9311d0c4 | 692 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
36e619d7 GV |
693 | return 0; |
694 | } | |
695 | *outl = soutl; | |
df05f2ce | 696 | } |
df05f2ce MC |
697 | |
698 | return ret; | |
699 | ||
0be6cf0c | 700 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
701 | legacy: |
702 | ||
0f113f3e MC |
703 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
704 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
705 | if (ret < 0) | |
706 | return 0; | |
707 | else | |
708 | *outl = ret; | |
709 | return 1; | |
710 | } | |
711 | ||
712 | b = ctx->cipher->block_size; | |
cbe29648 | 713 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
714 | if (b == 1) { |
715 | *outl = 0; | |
716 | return 1; | |
717 | } | |
718 | bl = ctx->buf_len; | |
719 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
720 | if (bl) { | |
9311d0c4 | 721 | ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); |
0f113f3e MC |
722 | return 0; |
723 | } | |
724 | *outl = 0; | |
725 | return 1; | |
726 | } | |
727 | ||
728 | n = b - bl; | |
729 | for (i = bl; i < b; i++) | |
730 | ctx->buf[i] = n; | |
731 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
732 | ||
733 | if (ret) | |
734 | *outl = b; | |
735 | ||
736 | return ret; | |
737 | } | |
d02b48c6 | 738 | |
be06a934 | 739 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
740 | const unsigned char *in, int inl) |
741 | { | |
df05f2ce | 742 | int fix_len, cmpl = inl, ret; |
0f113f3e | 743 | unsigned int b; |
df05f2ce | 744 | size_t soutl; |
3b94944c | 745 | int blocksize; |
0f113f3e | 746 | |
3d4c81b0 | 747 | if (outl != NULL) { |
748 | *outl = 0; | |
749 | } else { | |
9311d0c4 | 750 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 751 | return 0; |
752 | } | |
753 | ||
a8bf2f8f RL |
754 | /* Prevent accidental use of encryption context when decrypting */ |
755 | if (ctx->encrypt) { | |
9311d0c4 | 756 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
757 | return 0; |
758 | } | |
759 | ||
d2c2e49e | 760 | if (ctx->cipher == NULL) { |
9311d0c4 | 761 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d2c2e49e P |
762 | return 0; |
763 | } | |
764 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
765 | goto legacy; |
766 | ||
ed576acd | 767 | blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
3b94944c MC |
768 | |
769 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
9311d0c4 | 770 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
771 | return 0; |
772 | } | |
7c14d0c1 | 773 | ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl, |
3b94944c MC |
774 | inl + (blocksize == 1 ? 0 : blocksize), in, |
775 | (size_t)inl); | |
df05f2ce MC |
776 | |
777 | if (ret) { | |
778 | if (soutl > INT_MAX) { | |
9311d0c4 | 779 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
780 | return 0; |
781 | } | |
782 | *outl = soutl; | |
783 | } | |
784 | ||
785 | return ret; | |
786 | ||
0be6cf0c | 787 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
788 | legacy: |
789 | ||
7141ba31 MC |
790 | b = ctx->cipher->block_size; |
791 | ||
64846096 LP |
792 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
793 | cmpl = (cmpl + 7) / 8; | |
794 | ||
0f113f3e | 795 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
6d777689 | 796 | if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { |
9311d0c4 | 797 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 798 | return 0; |
83151b73 | 799 | } |
5fc77684 | 800 | |
0f113f3e MC |
801 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
802 | if (fix_len < 0) { | |
803 | *outl = 0; | |
804 | return 0; | |
805 | } else | |
806 | *outl = fix_len; | |
807 | return 1; | |
808 | } | |
809 | ||
2c236894 MC |
810 | if (inl <= 0) { |
811 | *outl = 0; | |
812 | return inl == 0; | |
813 | } | |
814 | ||
0f113f3e | 815 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 816 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 817 | |
cbe29648 | 818 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
819 | |
820 | if (ctx->final_used) { | |
5fc77684 AP |
821 | /* see comment about PTRDIFF_T comparison above */ |
822 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
6d777689 | 823 | || ossl_is_partially_overlapping(out, in, b)) { |
9311d0c4 | 824 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 825 | return 0; |
83151b73 | 826 | } |
c9fb704c MC |
827 | /* |
828 | * final_used is only ever set if buf_len is 0. Therefore the maximum | |
829 | * length output we will ever see from evp_EncryptDecryptUpdate is | |
830 | * the maximum multiple of the block length that is <= inl, or just: | |
831 | * inl & ~(b - 1) | |
832 | * Since final_used has been set then the final output length is: | |
833 | * (inl & ~(b - 1)) + b | |
834 | * This must never exceed INT_MAX | |
835 | */ | |
836 | if ((inl & ~(b - 1)) > INT_MAX - b) { | |
837 | ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); | |
838 | return 0; | |
839 | } | |
0f113f3e MC |
840 | memcpy(out, ctx->final, b); |
841 | out += b; | |
842 | fix_len = 1; | |
843 | } else | |
844 | fix_len = 0; | |
845 | ||
a8bf2f8f | 846 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
847 | return 0; |
848 | ||
849 | /* | |
850 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
851 | * copy of this last block | |
852 | */ | |
853 | if (b > 1 && !ctx->buf_len) { | |
854 | *outl -= b; | |
855 | ctx->final_used = 1; | |
856 | memcpy(ctx->final, &out[*outl], b); | |
857 | } else | |
858 | ctx->final_used = 0; | |
859 | ||
860 | if (fix_len) | |
861 | *outl += b; | |
862 | ||
863 | return 1; | |
864 | } | |
d02b48c6 | 865 | |
6b691a5c | 866 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
867 | { |
868 | int ret; | |
869 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
870 | return ret; | |
871 | } | |
581f1c84 DSH |
872 | |
873 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
874 | { |
875 | int i, n; | |
876 | unsigned int b; | |
df05f2ce MC |
877 | size_t soutl; |
878 | int ret; | |
3b94944c | 879 | int blocksize; |
a8bf2f8f | 880 | |
3d4c81b0 | 881 | if (outl != NULL) { |
882 | *outl = 0; | |
883 | } else { | |
9311d0c4 | 884 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 885 | return 0; |
886 | } | |
887 | ||
a8bf2f8f RL |
888 | /* Prevent accidental use of encryption context when decrypting */ |
889 | if (ctx->encrypt) { | |
9311d0c4 | 890 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
891 | return 0; |
892 | } | |
893 | ||
d4d89a07 | 894 | if (ctx->cipher == NULL) { |
9311d0c4 | 895 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d4d89a07 SS |
896 | return 0; |
897 | } | |
898 | ||
899 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
900 | goto legacy; |
901 | ||
ed576acd | 902 | blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
3b94944c MC |
903 | |
904 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
9311d0c4 | 905 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
906 | return 0; |
907 | } | |
908 | ||
7c14d0c1 | 909 | ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl, |
3b94944c | 910 | blocksize == 1 ? 0 : blocksize); |
df05f2ce MC |
911 | |
912 | if (ret) { | |
913 | if (soutl > INT_MAX) { | |
9311d0c4 | 914 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
915 | return 0; |
916 | } | |
917 | *outl = soutl; | |
918 | } | |
919 | ||
920 | return ret; | |
921 | ||
0be6cf0c | 922 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
923 | legacy: |
924 | ||
0f113f3e | 925 | *outl = 0; |
0f113f3e MC |
926 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
927 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
928 | if (i < 0) | |
929 | return 0; | |
930 | else | |
931 | *outl = i; | |
932 | return 1; | |
933 | } | |
934 | ||
935 | b = ctx->cipher->block_size; | |
936 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
937 | if (ctx->buf_len) { | |
9311d0c4 | 938 | ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); |
0f113f3e MC |
939 | return 0; |
940 | } | |
941 | *outl = 0; | |
942 | return 1; | |
943 | } | |
944 | if (b > 1) { | |
945 | if (ctx->buf_len || !ctx->final_used) { | |
9311d0c4 | 946 | ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH); |
26a7d938 | 947 | return 0; |
0f113f3e | 948 | } |
cbe29648 | 949 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
950 | |
951 | /* | |
952 | * The following assumes that the ciphertext has been authenticated. | |
953 | * Otherwise it provides a padding oracle. | |
954 | */ | |
955 | n = ctx->final[b - 1]; | |
956 | if (n == 0 || n > (int)b) { | |
9311d0c4 | 957 | ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); |
26a7d938 | 958 | return 0; |
0f113f3e MC |
959 | } |
960 | for (i = 0; i < n; i++) { | |
961 | if (ctx->final[--b] != n) { | |
9311d0c4 | 962 | ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); |
26a7d938 | 963 | return 0; |
0f113f3e MC |
964 | } |
965 | } | |
966 | n = ctx->cipher->block_size - n; | |
967 | for (i = 0; i < n; i++) | |
968 | out[i] = ctx->final[i]; | |
969 | *outl = n; | |
970 | } else | |
971 | *outl = 0; | |
208fb891 | 972 | return 1; |
0f113f3e | 973 | } |
d02b48c6 | 974 | |
6343829a | 975 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 976 | { |
d23adad1 MC |
977 | if (c->cipher->prov != NULL) { |
978 | int ok; | |
979 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
980 | size_t len = keylen; | |
459b15d4 | 981 | |
ed576acd | 982 | if (EVP_CIPHER_CTX_get_key_length(c) == keylen) |
d23adad1 MC |
983 | return 1; |
984 | ||
985 | /* Check the cipher actually understands this parameter */ | |
986 | if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher), | |
987 | OSSL_CIPHER_PARAM_KEYLEN) == NULL) | |
988 | return 0; | |
989 | ||
990 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); | |
7c14d0c1 | 991 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params); |
13273237 | 992 | |
d23adad1 MC |
993 | return ok > 0 ? 1 : 0; |
994 | } | |
13273237 | 995 | |
0be6cf0c | 996 | /* Code below to be removed when legacy support is dropped. */ |
d23adad1 MC |
997 | |
998 | /* | |
999 | * Note there have never been any built-in ciphers that define this flag | |
1000 | * since it was first introduced. | |
1001 | */ | |
0f113f3e MC |
1002 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
1003 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
ed576acd | 1004 | if (EVP_CIPHER_CTX_get_key_length(c) == keylen) |
0f113f3e MC |
1005 | return 1; |
1006 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
1007 | c->key_len = keylen; | |
1008 | return 1; | |
1009 | } | |
9311d0c4 | 1010 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH); |
0f113f3e MC |
1011 | return 0; |
1012 | } | |
49528751 | 1013 | |
f2e5ca84 | 1014 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 1015 | { |
13273237 | 1016 | int ok; |
459b15d4 | 1017 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
1c3ace68 | 1018 | unsigned int pd = pad; |
13273237 | 1019 | |
0f113f3e MC |
1020 | if (pad) |
1021 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
1022 | else | |
1023 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 1024 | |
719bc0e8 SL |
1025 | if (ctx->cipher != NULL && ctx->cipher->prov == NULL) |
1026 | return 1; | |
1c3ace68 | 1027 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
7c14d0c1 | 1028 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
459b15d4 | 1029 | |
13273237 | 1030 | return ok != 0; |
0f113f3e | 1031 | } |
f2e5ca84 | 1032 | |
49528751 DSH |
1033 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
1034 | { | |
e870791a | 1035 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 | 1036 | int set_params = 1; |
1c3ace68 | 1037 | size_t sz = arg; |
6a41156c | 1038 | unsigned int i; |
0d2bfe52 SL |
1039 | OSSL_PARAM params[4] = { |
1040 | OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END | |
1041 | }; | |
d91f4568 | 1042 | |
459b15d4 | 1043 | if (ctx == NULL || ctx->cipher == NULL) { |
9311d0c4 | 1044 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
0f113f3e MC |
1045 | return 0; |
1046 | } | |
1047 | ||
13273237 RL |
1048 | if (ctx->cipher->prov == NULL) |
1049 | goto legacy; | |
1050 | ||
1051 | switch (type) { | |
1052 | case EVP_CTRL_SET_KEY_LENGTH: | |
1c3ace68 | 1053 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
13273237 RL |
1054 | break; |
1055 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
4a42e264 SL |
1056 | set_params = 0; |
1057 | params[0] = | |
1058 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1c3ace68 | 1059 | ptr, sz); |
4a42e264 SL |
1060 | break; |
1061 | ||
d6d74cf4 RL |
1062 | case EVP_CTRL_INIT: |
1063 | /* | |
0be6cf0c | 1064 | * EVP_CTRL_INIT is purely legacy, no provider counterpart. |
d6d74cf4 RL |
1065 | * As a matter of fact, this should be dead code, but some caller |
1066 | * might still do a direct control call with this command, so... | |
1067 | * Legacy methods return 1 except for exceptional circumstances, so | |
1068 | * we do the same here to not be disruptive. | |
1069 | */ | |
1070 | return 1; | |
13273237 | 1071 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
459b15d4 | 1072 | default: |
6a36f209 | 1073 | goto end; |
459b15d4 SL |
1074 | case EVP_CTRL_AEAD_SET_IVLEN: |
1075 | if (arg < 0) | |
1076 | return 0; | |
1c3ace68 | 1077 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
13273237 | 1078 | break; |
f5d0c02c SL |
1079 | case EVP_CTRL_CCM_SET_L: |
1080 | if (arg < 2 || arg > 8) | |
1081 | return 0; | |
1082 | sz = 15 - arg; | |
1083 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); | |
1084 | break; | |
11b44359 SL |
1085 | case EVP_CTRL_AEAD_SET_IV_FIXED: |
1086 | params[0] = OSSL_PARAM_construct_octet_string( | |
1087 | OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz); | |
1088 | break; | |
1089 | case EVP_CTRL_GCM_IV_GEN: | |
1090 | set_params = 0; | |
1091 | if (arg < 0) | |
1092 | sz = 0; /* special case that uses the iv length */ | |
1093 | params[0] = OSSL_PARAM_construct_octet_string( | |
1094 | OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz); | |
1095 | break; | |
1096 | case EVP_CTRL_GCM_SET_IV_INV: | |
1097 | if (arg < 0) | |
1098 | return 0; | |
1099 | params[0] = OSSL_PARAM_construct_octet_string( | |
1100 | OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz); | |
459b15d4 | 1101 | break; |
6a41156c SL |
1102 | case EVP_CTRL_GET_RC5_ROUNDS: |
1103 | set_params = 0; /* Fall thru */ | |
1104 | case EVP_CTRL_SET_RC5_ROUNDS: | |
1105 | if (arg < 0) | |
1106 | return 0; | |
1107 | i = (unsigned int)arg; | |
1108 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i); | |
1109 | break; | |
eb173822 SL |
1110 | case EVP_CTRL_SET_SPEED: |
1111 | if (arg < 0) | |
1112 | return 0; | |
1113 | i = (unsigned int)arg; | |
1114 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i); | |
1115 | break; | |
459b15d4 | 1116 | case EVP_CTRL_AEAD_GET_TAG: |
1c3ace68 SL |
1117 | set_params = 0; /* Fall thru */ |
1118 | case EVP_CTRL_AEAD_SET_TAG: | |
459b15d4 | 1119 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
1c3ace68 | 1120 | ptr, sz); |
459b15d4 SL |
1121 | break; |
1122 | case EVP_CTRL_AEAD_TLS1_AAD: | |
0d2bfe52 | 1123 | /* This one does a set and a get - since it returns a size */ |
459b15d4 SL |
1124 | params[0] = |
1125 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1c3ace68 | 1126 | ptr, sz); |
7c14d0c1 | 1127 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
459b15d4 | 1128 | if (ret <= 0) |
6a36f209 | 1129 | goto end; |
459b15d4 SL |
1130 | params[0] = |
1131 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
7c14d0c1 | 1132 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
459b15d4 | 1133 | if (ret <= 0) |
6a36f209 | 1134 | goto end; |
459b15d4 | 1135 | return sz; |
f816aa47 SL |
1136 | #ifndef OPENSSL_NO_RC2 |
1137 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
1138 | set_params = 0; /* Fall thru */ | |
1139 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
1140 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz); | |
1141 | break; | |
1142 | #endif /* OPENSSL_NO_RC2 */ | |
0d2bfe52 SL |
1143 | #if !defined(OPENSSL_NO_MULTIBLOCK) |
1144 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE: | |
1145 | params[0] = OSSL_PARAM_construct_size_t( | |
1146 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz); | |
7c14d0c1 | 1147 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1148 | if (ret <= 0) |
1149 | return 0; | |
1150 | ||
1151 | params[0] = OSSL_PARAM_construct_size_t( | |
1152 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz); | |
1153 | params[1] = OSSL_PARAM_construct_end(); | |
7c14d0c1 | 1154 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1155 | if (ret <= 0) |
1156 | return 0; | |
1157 | return sz; | |
1158 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: { | |
1159 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1160 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1161 | ||
1162 | if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) | |
1163 | return 0; | |
1164 | ||
1165 | params[0] = OSSL_PARAM_construct_octet_string( | |
1166 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len); | |
1167 | params[1] = OSSL_PARAM_construct_uint( | |
1168 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
7c14d0c1 | 1169 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1170 | if (ret <= 0) |
1171 | return ret; | |
1172 | /* Retrieve the return values changed by the set */ | |
1173 | params[0] = OSSL_PARAM_construct_size_t( | |
1174 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz); | |
1175 | params[1] = OSSL_PARAM_construct_uint( | |
1176 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1177 | params[2] = OSSL_PARAM_construct_end(); | |
7c14d0c1 | 1178 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1179 | if (ret <= 0) |
1180 | return 0; | |
1181 | return sz; | |
1182 | } | |
1183 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: { | |
1184 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1185 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1186 | ||
1187 | params[0] = OSSL_PARAM_construct_octet_string( | |
1188 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len); | |
1189 | ||
1190 | params[1] = OSSL_PARAM_construct_octet_string( | |
1191 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp, | |
1192 | p->len); | |
1193 | params[2] = OSSL_PARAM_construct_uint( | |
1194 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
7c14d0c1 | 1195 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1196 | if (ret <= 0) |
1197 | return ret; | |
1198 | params[0] = OSSL_PARAM_construct_size_t( | |
1199 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz); | |
1200 | params[1] = OSSL_PARAM_construct_end(); | |
7c14d0c1 | 1201 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
0d2bfe52 SL |
1202 | if (ret <= 0) |
1203 | return 0; | |
1204 | return sz; | |
1205 | } | |
1206 | #endif /* OPENSSL_NO_MULTIBLOCK */ | |
1207 | case EVP_CTRL_AEAD_SET_MAC_KEY: | |
1208 | if (arg < 0) | |
1209 | return -1; | |
1210 | params[0] = OSSL_PARAM_construct_octet_string( | |
1211 | OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz); | |
1212 | break; | |
13273237 | 1213 | } |
459b15d4 SL |
1214 | |
1215 | if (set_params) | |
7c14d0c1 | 1216 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
459b15d4 | 1217 | else |
7c14d0c1 | 1218 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
6a36f209 | 1219 | goto end; |
13273237 | 1220 | |
0be6cf0c | 1221 | /* Code below to be removed when legacy support is dropped. */ |
459b15d4 SL |
1222 | legacy: |
1223 | if (ctx->cipher->ctrl == NULL) { | |
9311d0c4 | 1224 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED); |
0f113f3e MC |
1225 | return 0; |
1226 | } | |
1227 | ||
1228 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
552be00d | 1229 | |
6a36f209 | 1230 | end: |
e870791a | 1231 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
9311d0c4 | 1232 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); |
0f113f3e MC |
1233 | return 0; |
1234 | } | |
1235 | return ret; | |
49528751 | 1236 | } |
216659eb | 1237 | |
ae3ff60e RL |
1238 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
1239 | { | |
1240 | if (cipher != NULL && cipher->get_params != NULL) | |
1241 | return cipher->get_params(params); | |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1246 | { | |
92d9d0ae | 1247 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) |
7c14d0c1 | 1248 | return ctx->cipher->set_ctx_params(ctx->algctx, params); |
ae3ff60e RL |
1249 | return 0; |
1250 | } | |
1251 | ||
1252 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1253 | { | |
92d9d0ae | 1254 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
7c14d0c1 | 1255 | return ctx->cipher->get_ctx_params(ctx->algctx, params); |
ae3ff60e RL |
1256 | return 0; |
1257 | } | |
1258 | ||
1259 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1260 | { | |
1261 | if (cipher != NULL && cipher->gettable_params != NULL) | |
18ec26ba | 1262 | return cipher->gettable_params( |
ed576acd | 1263 | ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher))); |
ae3ff60e RL |
1264 | return NULL; |
1265 | } | |
1266 | ||
41f7ecf3 | 1267 | const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e | 1268 | { |
7c14d0c1 | 1269 | void *provctx; |
292b4184 P |
1270 | |
1271 | if (cipher != NULL && cipher->settable_ctx_params != NULL) { | |
ed576acd | 1272 | provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)); |
7c14d0c1 | 1273 | return cipher->settable_ctx_params(NULL, provctx); |
292b4184 | 1274 | } |
ae3ff60e RL |
1275 | return NULL; |
1276 | } | |
1277 | ||
41f7ecf3 | 1278 | const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e | 1279 | { |
7c14d0c1 | 1280 | void *provctx; |
292b4184 P |
1281 | |
1282 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) { | |
ed576acd | 1283 | provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)); |
7c14d0c1 | 1284 | return cipher->gettable_ctx_params(NULL, provctx); |
292b4184 P |
1285 | } |
1286 | return NULL; | |
1287 | } | |
1288 | ||
1289 | const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx) | |
1290 | { | |
1291 | void *alg; | |
1292 | ||
1293 | if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) { | |
ed576acd | 1294 | alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher)); |
7c14d0c1 | 1295 | return cctx->cipher->settable_ctx_params(cctx->algctx, alg); |
292b4184 P |
1296 | } |
1297 | return NULL; | |
1298 | } | |
1299 | ||
1300 | const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx) | |
1301 | { | |
7c14d0c1 | 1302 | void *provctx; |
292b4184 P |
1303 | |
1304 | if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) { | |
ed576acd | 1305 | provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher)); |
7c14d0c1 | 1306 | return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx); |
292b4184 | 1307 | } |
ae3ff60e RL |
1308 | return NULL; |
1309 | } | |
1310 | ||
11eef7e7 | 1311 | #ifndef FIPS_MODULE |
b4250010 | 1312 | static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx) |
11eef7e7 SL |
1313 | { |
1314 | const EVP_CIPHER *cipher = ctx->cipher; | |
1315 | const OSSL_PROVIDER *prov; | |
1316 | ||
1317 | if (cipher == NULL) | |
1318 | return NULL; | |
1319 | ||
ed576acd | 1320 | prov = EVP_CIPHER_get0_provider(cipher); |
a829b735 | 1321 | return ossl_provider_libctx(prov); |
11eef7e7 SL |
1322 | } |
1323 | #endif | |
1324 | ||
216659eb | 1325 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e MC |
1326 | { |
1327 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1328 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4a42e264 | 1329 | |
f844f9eb | 1330 | #ifdef FIPS_MODULE |
4a42e264 SL |
1331 | return 0; |
1332 | #else | |
1333 | { | |
1334 | int kl; | |
b4250010 | 1335 | OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx); |
4a42e264 | 1336 | |
ed576acd | 1337 | kl = EVP_CIPHER_CTX_get_key_length(ctx); |
5cbd2ea3 | 1338 | if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0) |
4a42e264 SL |
1339 | return 0; |
1340 | return 1; | |
1341 | } | |
f844f9eb | 1342 | #endif /* FIPS_MODULE */ |
0f113f3e | 1343 | } |
216659eb | 1344 | |
c2bf7208 | 1345 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1346 | { |
1347 | if ((in == NULL) || (in->cipher == NULL)) { | |
9311d0c4 | 1348 | ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED); |
0f113f3e MC |
1349 | return 0; |
1350 | } | |
df05f2ce MC |
1351 | |
1352 | if (in->cipher->prov == NULL) | |
1353 | goto legacy; | |
1354 | ||
1355 | if (in->cipher->dupctx == NULL) { | |
9311d0c4 | 1356 | ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
df05f2ce MC |
1357 | return 0; |
1358 | } | |
1359 | ||
1360 | EVP_CIPHER_CTX_reset(out); | |
1361 | ||
1362 | *out = *in; | |
7c14d0c1 | 1363 | out->algctx = NULL; |
df05f2ce | 1364 | |
70c35fd1 | 1365 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1366 | out->fetched_cipher = NULL; |
1367 | return 0; | |
1368 | } | |
1369 | ||
7c14d0c1 SL |
1370 | out->algctx = in->cipher->dupctx(in->algctx); |
1371 | if (out->algctx == NULL) { | |
9311d0c4 | 1372 | ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
df05f2ce MC |
1373 | return 0; |
1374 | } | |
1375 | ||
1376 | return 1; | |
1377 | ||
0be6cf0c | 1378 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
1379 | legacy: |
1380 | ||
f844f9eb | 1381 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
1382 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1383 | if (in->engine && !ENGINE_init(in->engine)) { | |
9311d0c4 | 1384 | ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB); |
0f113f3e MC |
1385 | return 0; |
1386 | } | |
c2bf7208 DSH |
1387 | #endif |
1388 | ||
c0ca39bd | 1389 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1390 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1391 | |
1392 | if (in->cipher_data && in->cipher->ctx_size) { | |
1393 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1394 | if (out->cipher_data == NULL) { |
273a0218 | 1395 | out->cipher = NULL; |
9311d0c4 | 1396 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1397 | return 0; |
1398 | } | |
1399 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1400 | } | |
1401 | ||
1402 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1403 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1404 | out->cipher = NULL; | |
9311d0c4 | 1405 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
273a0218 BE |
1406 | return 0; |
1407 | } | |
0f113f3e MC |
1408 | return 1; |
1409 | } | |
df05f2ce | 1410 | |
550f974a RL |
1411 | EVP_CIPHER *evp_cipher_new(void) |
1412 | { | |
1413 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1414 | ||
1415 | if (cipher != NULL) { | |
1416 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1417 | if (cipher->lock == NULL) { | |
1418 | OPENSSL_free(cipher); | |
1419 | return NULL; | |
1420 | } | |
1421 | cipher->refcnt = 1; | |
1422 | } | |
1423 | return cipher; | |
1424 | } | |
1425 | ||
32040838 RL |
1426 | /* |
1427 | * FIPS module note: since internal fetches will be entirely | |
1428 | * provider based, we know that none of its code depends on legacy | |
1429 | * NIDs or any functionality that use them. | |
1430 | */ | |
f844f9eb | 1431 | #ifndef FIPS_MODULE |
83abd33c | 1432 | /* After removal of legacy support get rid of the need for legacy NIDs */ |
32040838 RL |
1433 | static void set_legacy_nid(const char *name, void *vlegacy_nid) |
1434 | { | |
1435 | int nid; | |
1436 | int *legacy_nid = vlegacy_nid; | |
6a835fcf RL |
1437 | /* |
1438 | * We use lowest level function to get the associated method, because | |
1439 | * higher level functions such as EVP_get_cipherbyname() have changed | |
1440 | * to look at providers too. | |
1441 | */ | |
1442 | const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH); | |
32040838 RL |
1443 | |
1444 | if (*legacy_nid == -1) /* We found a clash already */ | |
1445 | return; | |
6a835fcf | 1446 | if (legacy_method == NULL) |
32040838 | 1447 | return; |
ed576acd | 1448 | nid = EVP_CIPHER_get_nid(legacy_method); |
32040838 RL |
1449 | if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
1450 | *legacy_nid = -1; | |
1451 | return; | |
1452 | } | |
1453 | *legacy_nid = nid; | |
1454 | } | |
1455 | #endif | |
1456 | ||
309a78aa RL |
1457 | static void *evp_cipher_from_algorithm(const int name_id, |
1458 | const OSSL_ALGORITHM *algodef, | |
1459 | OSSL_PROVIDER *prov) | |
df05f2ce | 1460 | { |
309a78aa | 1461 | const OSSL_DISPATCH *fns = algodef->implementation; |
df05f2ce MC |
1462 | EVP_CIPHER *cipher = NULL; |
1463 | int fnciphcnt = 0, fnctxcnt = 0; | |
1464 | ||
f7c16d48 | 1465 | if ((cipher = evp_cipher_new()) == NULL) { |
9311d0c4 | 1466 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
df05f2ce | 1467 | return NULL; |
6b9e3724 | 1468 | } |
df05f2ce | 1469 | |
f844f9eb | 1470 | #ifndef FIPS_MODULE |
32040838 | 1471 | cipher->nid = NID_undef; |
d84f5515 MC |
1472 | if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid) |
1473 | || cipher->nid == -1) { | |
32040838 RL |
1474 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); |
1475 | EVP_CIPHER_free(cipher); | |
1476 | return NULL; | |
f7c16d48 | 1477 | } |
ed71e917 MC |
1478 | #endif |
1479 | ||
32040838 | 1480 | cipher->name_id = name_id; |
6c9bc258 TM |
1481 | if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) { |
1482 | EVP_CIPHER_free(cipher); | |
1483 | return NULL; | |
1484 | } | |
309a78aa | 1485 | cipher->description = algodef->algorithm_description; |
32040838 | 1486 | |
df05f2ce MC |
1487 | for (; fns->function_id != 0; fns++) { |
1488 | switch (fns->function_id) { | |
1489 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1490 | if (cipher->newctx != NULL) | |
1491 | break; | |
363b1e5d | 1492 | cipher->newctx = OSSL_FUNC_cipher_newctx(fns); |
df05f2ce MC |
1493 | fnctxcnt++; |
1494 | break; | |
1495 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1496 | if (cipher->einit != NULL) | |
1497 | break; | |
363b1e5d | 1498 | cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns); |
df05f2ce MC |
1499 | fnciphcnt++; |
1500 | break; | |
1501 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1502 | if (cipher->dinit != NULL) | |
1503 | break; | |
363b1e5d | 1504 | cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns); |
df05f2ce MC |
1505 | fnciphcnt++; |
1506 | break; | |
1507 | case OSSL_FUNC_CIPHER_UPDATE: | |
1508 | if (cipher->cupdate != NULL) | |
1509 | break; | |
363b1e5d | 1510 | cipher->cupdate = OSSL_FUNC_cipher_update(fns); |
df05f2ce MC |
1511 | fnciphcnt++; |
1512 | break; | |
1513 | case OSSL_FUNC_CIPHER_FINAL: | |
1514 | if (cipher->cfinal != NULL) | |
1515 | break; | |
363b1e5d | 1516 | cipher->cfinal = OSSL_FUNC_cipher_final(fns); |
df05f2ce MC |
1517 | fnciphcnt++; |
1518 | break; | |
718b133a MC |
1519 | case OSSL_FUNC_CIPHER_CIPHER: |
1520 | if (cipher->ccipher != NULL) | |
1521 | break; | |
363b1e5d | 1522 | cipher->ccipher = OSSL_FUNC_cipher_cipher(fns); |
718b133a | 1523 | break; |
df05f2ce MC |
1524 | case OSSL_FUNC_CIPHER_FREECTX: |
1525 | if (cipher->freectx != NULL) | |
1526 | break; | |
363b1e5d | 1527 | cipher->freectx = OSSL_FUNC_cipher_freectx(fns); |
df05f2ce MC |
1528 | fnctxcnt++; |
1529 | break; | |
1530 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1531 | if (cipher->dupctx != NULL) | |
1532 | break; | |
363b1e5d | 1533 | cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns); |
df05f2ce | 1534 | break; |
df05f2ce MC |
1535 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1536 | if (cipher->get_params != NULL) | |
1537 | break; | |
363b1e5d | 1538 | cipher->get_params = OSSL_FUNC_cipher_get_params(fns); |
df05f2ce | 1539 | break; |
92d9d0ae RL |
1540 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
1541 | if (cipher->get_ctx_params != NULL) | |
718b133a | 1542 | break; |
363b1e5d | 1543 | cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns); |
718b133a | 1544 | break; |
92d9d0ae RL |
1545 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
1546 | if (cipher->set_ctx_params != NULL) | |
df05f2ce | 1547 | break; |
363b1e5d | 1548 | cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns); |
df05f2ce | 1549 | break; |
ae3ff60e RL |
1550 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
1551 | if (cipher->gettable_params != NULL) | |
1552 | break; | |
363b1e5d | 1553 | cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns); |
ae3ff60e RL |
1554 | break; |
1555 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1556 | if (cipher->gettable_ctx_params != NULL) | |
1557 | break; | |
1558 | cipher->gettable_ctx_params = | |
363b1e5d | 1559 | OSSL_FUNC_cipher_gettable_ctx_params(fns); |
ae3ff60e RL |
1560 | break; |
1561 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1562 | if (cipher->settable_ctx_params != NULL) | |
1563 | break; | |
1564 | cipher->settable_ctx_params = | |
363b1e5d | 1565 | OSSL_FUNC_cipher_settable_ctx_params(fns); |
ae3ff60e | 1566 | break; |
df05f2ce MC |
1567 | } |
1568 | } | |
718b133a MC |
1569 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1570 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1571 | || fnctxcnt != 2) { |
df05f2ce MC |
1572 | /* |
1573 | * In order to be a consistent set of functions we must have at least | |
1574 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1575 | * functions, or a single "cipher" function. In all cases we need both |
1576 | * the "newctx" and "freectx" functions. | |
df05f2ce | 1577 | */ |
550f974a | 1578 | EVP_CIPHER_free(cipher); |
9311d0c4 | 1579 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
df05f2ce MC |
1580 | return NULL; |
1581 | } | |
1582 | cipher->prov = prov; | |
1583 | if (prov != NULL) | |
7c95390e | 1584 | ossl_provider_up_ref(prov); |
df05f2ce | 1585 | |
ae69da05 MC |
1586 | if (!evp_cipher_cache_constants(cipher)) { |
1587 | EVP_CIPHER_free(cipher); | |
1588 | ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED); | |
1589 | cipher = NULL; | |
1590 | } | |
1591 | ||
df05f2ce MC |
1592 | return cipher; |
1593 | } | |
1594 | ||
70c35fd1 | 1595 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1596 | { |
70c35fd1 | 1597 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1598 | } |
1599 | ||
1600 | static void evp_cipher_free(void *cipher) | |
1601 | { | |
550f974a | 1602 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1603 | } |
1604 | ||
b4250010 | 1605 | EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, |
df05f2ce MC |
1606 | const char *properties) |
1607 | { | |
0211740f RL |
1608 | EVP_CIPHER *cipher = |
1609 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
309a78aa | 1610 | evp_cipher_from_algorithm, evp_cipher_up_ref, |
0211740f RL |
1611 | evp_cipher_free); |
1612 | ||
0211740f | 1613 | return cipher; |
df05f2ce | 1614 | } |
c540f00f | 1615 | |
550f974a RL |
1616 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
1617 | { | |
1618 | int ref = 0; | |
1619 | ||
f6c95e46 RS |
1620 | if (cipher->origin == EVP_ORIG_DYNAMIC) |
1621 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
550f974a RL |
1622 | return 1; |
1623 | } | |
1624 | ||
f6c95e46 RS |
1625 | void evp_cipher_free_int(EVP_CIPHER *cipher) |
1626 | { | |
6c9bc258 | 1627 | OPENSSL_free(cipher->type_name); |
f6c95e46 RS |
1628 | ossl_provider_free(cipher->prov); |
1629 | CRYPTO_THREAD_lock_free(cipher->lock); | |
1630 | OPENSSL_free(cipher); | |
1631 | } | |
1632 | ||
550f974a RL |
1633 | void EVP_CIPHER_free(EVP_CIPHER *cipher) |
1634 | { | |
1635 | int i; | |
1636 | ||
f6c95e46 | 1637 | if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC) |
550f974a RL |
1638 | return; |
1639 | ||
1640 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1641 | if (i > 0) | |
1642 | return; | |
f6c95e46 | 1643 | evp_cipher_free_int(cipher); |
550f974a RL |
1644 | } |
1645 | ||
b4250010 | 1646 | void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx, |
251e610c RL |
1647 | void (*fn)(EVP_CIPHER *mac, void *arg), |
1648 | void *arg) | |
c540f00f RL |
1649 | { |
1650 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1651 | (void (*)(void *, void *))fn, arg, | |
cd770738 RL |
1652 | evp_cipher_from_algorithm, evp_cipher_up_ref, |
1653 | evp_cipher_free); | |
c540f00f | 1654 | } |