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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> |
b39fc560 | 16 | #include "internal/cryptlib.h" |
ec577822 | 17 | #include <openssl/evp.h> |
7f060601 | 18 | #include <openssl/err.h> |
3a87a9b9 | 19 | #include <openssl/rand.h> |
3c27208f | 20 | #include <openssl/engine.h> |
df05f2ce MC |
21 | #include <openssl/params.h> |
22 | #include <openssl/core_names.h> | |
25f2138b | 23 | #include "crypto/evp.h" |
df05f2ce | 24 | #include "internal/provider.h" |
706457b7 | 25 | #include "evp_local.h" |
d02b48c6 | 26 | |
df05f2ce | 27 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) |
0f113f3e | 28 | { |
df05f2ce | 29 | if (ctx == NULL) |
8baf9968 | 30 | return 1; |
df05f2ce MC |
31 | |
32 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) | |
33 | goto legacy; | |
34 | ||
35 | if (ctx->provctx != NULL) { | |
36 | if (ctx->cipher->freectx != NULL) | |
37 | ctx->cipher->freectx(ctx->provctx); | |
38 | ctx->provctx = NULL; | |
39 | } | |
40 | if (ctx->fetched_cipher != NULL) | |
550f974a | 41 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
42 | memset(ctx, 0, sizeof(*ctx)); |
43 | ||
44 | return 1; | |
45 | ||
0be6cf0c | 46 | /* Remove legacy code below when legacy support is removed. */ |
df05f2ce MC |
47 | legacy: |
48 | ||
49 | if (ctx->cipher != NULL) { | |
50 | if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) | |
8baf9968 RL |
51 | return 0; |
52 | /* Cleanse cipher context data */ | |
df05f2ce MC |
53 | if (ctx->cipher_data && ctx->cipher->ctx_size) |
54 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
8baf9968 | 55 | } |
df05f2ce | 56 | OPENSSL_free(ctx->cipher_data); |
f844f9eb | 57 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 58 | ENGINE_finish(ctx->engine); |
8baf9968 | 59 | #endif |
df05f2ce | 60 | memset(ctx, 0, sizeof(*ctx)); |
8baf9968 | 61 | return 1; |
0f113f3e | 62 | } |
d02b48c6 | 63 | |
b40228a6 | 64 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) |
0f113f3e | 65 | { |
8baf9968 RL |
66 | return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX)); |
67 | } | |
68 | ||
69 | void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) | |
70 | { | |
71 | EVP_CIPHER_CTX_reset(ctx); | |
72 | OPENSSL_free(ctx); | |
0f113f3e | 73 | } |
581f1c84 | 74 | |
4b58d9b4 P |
75 | static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx, |
76 | const EVP_CIPHER *cipher, | |
77 | ENGINE *impl, const unsigned char *key, | |
78 | const unsigned char *iv, int enc, | |
79 | const OSSL_PARAM params[]) | |
0f113f3e | 80 | { |
c12bf350 | 81 | int n; |
f844f9eb | 82 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 83 | ENGINE *tmpimpl = NULL; |
319e518a | 84 | #endif |
df05f2ce MC |
85 | /* |
86 | * enc == 1 means we are encrypting. | |
87 | * enc == 0 means we are decrypting. | |
88 | * enc == -1 means, use the previously initialised value for encrypt/decrypt | |
89 | */ | |
90 | if (enc == -1) { | |
0f113f3e | 91 | enc = ctx->encrypt; |
df05f2ce | 92 | } else { |
0f113f3e MC |
93 | if (enc) |
94 | enc = 1; | |
95 | ctx->encrypt = enc; | |
96 | } | |
df05f2ce MC |
97 | |
98 | if (cipher == NULL && ctx->cipher == NULL) { | |
9311d0c4 | 99 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
df05f2ce MC |
100 | return 0; |
101 | } | |
102 | ||
0be6cf0c | 103 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce | 104 | |
f844f9eb | 105 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
106 | /* |
107 | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so | |
108 | * this context may already have an ENGINE! Try to avoid releasing the | |
109 | * previous handle, re-querying for an ENGINE, and having a | |
0d4fb843 | 110 | * reinitialisation, when it may all be unnecessary. |
0f113f3e | 111 | */ |
f6b94279 | 112 | if (ctx->engine && ctx->cipher |
a7f9e0a4 | 113 | && (cipher == NULL || cipher->nid == ctx->cipher->nid)) |
0f113f3e | 114 | goto skip_to_init; |
df05f2ce MC |
115 | |
116 | if (cipher != NULL && impl == NULL) { | |
117 | /* Ask if an ENGINE is reserved for this job */ | |
118 | tmpimpl = ENGINE_get_cipher_engine(cipher->nid); | |
119 | } | |
0b13e9f0 | 120 | #endif |
df05f2ce MC |
121 | |
122 | /* | |
123 | * If there are engines involved then we should use legacy handling for now. | |
124 | */ | |
125 | if (ctx->engine != NULL | |
f844f9eb | 126 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
319e518a MC |
127 | || tmpimpl != NULL |
128 | #endif | |
129 | || impl != NULL) { | |
df05f2ce MC |
130 | if (ctx->cipher == ctx->fetched_cipher) |
131 | ctx->cipher = NULL; | |
550f974a | 132 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
133 | ctx->fetched_cipher = NULL; |
134 | goto legacy; | |
135 | } | |
df05f2ce MC |
136 | /* |
137 | * Ensure a context left lying around from last time is cleared | |
138 | * (legacy code) | |
139 | */ | |
140 | if (cipher != NULL && ctx->cipher != NULL) { | |
141 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
142 | ctx->cipher_data = NULL; | |
143 | } | |
144 | ||
145 | ||
0be6cf0c | 146 | /* Start of non-legacy code below */ |
df05f2ce MC |
147 | |
148 | /* Ensure a context left lying around from last time is cleared */ | |
149 | if (cipher != NULL && ctx->cipher != NULL) { | |
150 | unsigned long flags = ctx->flags; | |
151 | ||
152 | EVP_CIPHER_CTX_reset(ctx); | |
153 | /* Restore encrypt and flags */ | |
154 | ctx->encrypt = enc; | |
155 | ctx->flags = flags; | |
156 | } | |
157 | ||
7f612b1f | 158 | if (cipher == NULL) |
df05f2ce MC |
159 | cipher = ctx->cipher; |
160 | ||
161 | if (cipher->prov == NULL) { | |
f844f9eb | 162 | #ifdef FIPS_MODULE |
79c44b4e | 163 | /* We only do explicit fetches inside the FIPS module */ |
9311d0c4 | 164 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
319e518a MC |
165 | return 0; |
166 | #else | |
167 | EVP_CIPHER *provciph = | |
068489a2 MC |
168 | EVP_CIPHER_fetch(NULL, |
169 | cipher->nid == NID_undef ? "NULL" | |
170 | : OBJ_nid2sn(cipher->nid), | |
171 | ""); | |
319e518a | 172 | |
ec0ce188 | 173 | if (provciph == NULL) |
df05f2ce | 174 | return 0; |
df05f2ce | 175 | cipher = provciph; |
550f974a | 176 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 177 | ctx->fetched_cipher = provciph; |
319e518a | 178 | #endif |
df05f2ce MC |
179 | } |
180 | ||
aea01d13 P |
181 | if (cipher->prov != NULL) { |
182 | if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) { | |
183 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
184 | return 0; | |
185 | } | |
186 | EVP_CIPHER_free(ctx->fetched_cipher); | |
187 | ctx->fetched_cipher = (EVP_CIPHER *)cipher; | |
188 | } | |
df05f2ce MC |
189 | ctx->cipher = cipher; |
190 | if (ctx->provctx == NULL) { | |
a39eb840 | 191 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
df05f2ce | 192 | if (ctx->provctx == NULL) { |
9311d0c4 | 193 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
194 | return 0; |
195 | } | |
196 | } | |
197 | ||
198 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 199 | /* |
df05f2ce MC |
200 | * If this ctx was already set up for no padding then we need to tell |
201 | * the new cipher about it. | |
202 | */ | |
203 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
204 | return 0; | |
205 | } | |
206 | ||
207 | if (enc) { | |
208 | if (ctx->cipher->einit == NULL) { | |
9311d0c4 | 209 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
210 | return 0; |
211 | } | |
212 | ||
344cfa34 MC |
213 | return ctx->cipher->einit(ctx->provctx, |
214 | key, | |
33b40a10 MC |
215 | key == NULL ? 0 |
216 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 217 | iv, |
33b40a10 | 218 | iv == NULL ? 0 |
4b58d9b4 P |
219 | : EVP_CIPHER_CTX_iv_length(ctx), |
220 | params); | |
df05f2ce MC |
221 | } |
222 | ||
223 | if (ctx->cipher->dinit == NULL) { | |
9311d0c4 | 224 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
df05f2ce MC |
225 | return 0; |
226 | } | |
227 | ||
344cfa34 MC |
228 | return ctx->cipher->dinit(ctx->provctx, |
229 | key, | |
33b40a10 MC |
230 | key == NULL ? 0 |
231 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 232 | iv, |
33b40a10 | 233 | iv == NULL ? 0 |
4b58d9b4 P |
234 | : EVP_CIPHER_CTX_iv_length(ctx), |
235 | params); | |
df05f2ce | 236 | |
0be6cf0c | 237 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
238 | legacy: |
239 | ||
240 | if (cipher != NULL) { | |
241 | /* | |
242 | * Ensure a context left lying around from last time is cleared (we | |
243 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
244 | * EVP_CIPHER could be used). |
245 | */ | |
246 | if (ctx->cipher) { | |
247 | unsigned long flags = ctx->flags; | |
c0ca39bd | 248 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
249 | /* Restore encrypt and flags */ |
250 | ctx->encrypt = enc; | |
251 | ctx->flags = flags; | |
252 | } | |
f844f9eb | 253 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 254 | if (impl != NULL) { |
0f113f3e | 255 | if (!ENGINE_init(impl)) { |
9311d0c4 | 256 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
257 | return 0; |
258 | } | |
df05f2ce MC |
259 | } else { |
260 | impl = tmpimpl; | |
261 | } | |
262 | if (impl != NULL) { | |
0f113f3e MC |
263 | /* There's an ENGINE for this job ... (apparently) */ |
264 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
265 | |
266 | if (c == NULL) { | |
0f113f3e MC |
267 | /* |
268 | * One positive side-effect of US's export control history, | |
269 | * is that we should at least be able to avoid using US | |
0d4fb843 | 270 | * misspellings of "initialisation"? |
0f113f3e | 271 | */ |
9311d0c4 | 272 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
273 | return 0; |
274 | } | |
275 | /* We'll use the ENGINE's private cipher definition */ | |
276 | cipher = c; | |
277 | /* | |
278 | * Store the ENGINE functional reference so we know 'cipher' came | |
279 | * from an ENGINE and we need to release it when done. | |
280 | */ | |
281 | ctx->engine = impl; | |
df05f2ce | 282 | } else { |
0f113f3e | 283 | ctx->engine = NULL; |
df05f2ce | 284 | } |
0b13e9f0 | 285 | #endif |
544a2aea | 286 | |
0f113f3e MC |
287 | ctx->cipher = cipher; |
288 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 289 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 290 | if (ctx->cipher_data == NULL) { |
273a0218 | 291 | ctx->cipher = NULL; |
9311d0c4 | 292 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
293 | return 0; |
294 | } | |
295 | } else { | |
296 | ctx->cipher_data = NULL; | |
297 | } | |
298 | ctx->key_len = cipher->key_len; | |
299 | /* Preserve wrap enable flag, zero everything else */ | |
300 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
301 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
302 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 303 | ctx->cipher = NULL; |
9311d0c4 | 304 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
0f113f3e MC |
305 | return 0; |
306 | } | |
307 | } | |
0f113f3e | 308 | } |
f844f9eb | 309 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e | 310 | skip_to_init: |
0b13e9f0 | 311 | #endif |
1702c500 P |
312 | if (ctx->cipher == NULL) |
313 | return 0; | |
314 | ||
0f113f3e MC |
315 | /* we assume block size is a power of 2 in *cryptUpdate */ |
316 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
317 | || ctx->cipher->block_size == 8 | |
318 | || ctx->cipher->block_size == 16); | |
319 | ||
320 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
321 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
9311d0c4 | 322 | ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED); |
0f113f3e MC |
323 | return 0; |
324 | } | |
325 | ||
480d3323 | 326 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
327 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
328 | ||
329 | case EVP_CIPH_STREAM_CIPHER: | |
330 | case EVP_CIPH_ECB_MODE: | |
331 | break; | |
332 | ||
333 | case EVP_CIPH_CFB_MODE: | |
334 | case EVP_CIPH_OFB_MODE: | |
335 | ||
336 | ctx->num = 0; | |
337 | /* fall-through */ | |
338 | ||
339 | case EVP_CIPH_CBC_MODE: | |
c12bf350 P |
340 | n = EVP_CIPHER_CTX_iv_length(ctx); |
341 | if (!ossl_assert(n >= 0 && n <= (int)sizeof(ctx->iv))) | |
342 | return 0; | |
0f113f3e MC |
343 | if (iv) |
344 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
345 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
346 | break; | |
347 | ||
348 | case EVP_CIPH_CTR_MODE: | |
349 | ctx->num = 0; | |
350 | /* Don't reuse IV for CTR mode */ | |
351 | if (iv) | |
352 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
353 | break; | |
354 | ||
355 | default: | |
356 | return 0; | |
0f113f3e MC |
357 | } |
358 | } | |
359 | ||
360 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
361 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
362 | return 0; | |
363 | } | |
364 | ctx->buf_len = 0; | |
365 | ctx->final_used = 0; | |
366 | ctx->block_mask = ctx->cipher->block_size - 1; | |
367 | return 1; | |
368 | } | |
d02b48c6 | 369 | |
4b58d9b4 P |
370 | int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
371 | const unsigned char *key, const unsigned char *iv, | |
372 | int enc, const OSSL_PARAM params[]) | |
373 | { | |
374 | return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params); | |
375 | } | |
376 | ||
377 | int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
378 | const unsigned char *key, const unsigned char *iv, int enc) | |
379 | { | |
380 | if (cipher != NULL) | |
381 | EVP_CIPHER_CTX_reset(ctx); | |
382 | return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL); | |
383 | } | |
384 | ||
385 | int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
386 | ENGINE *impl, const unsigned char *key, | |
387 | const unsigned char *iv, int enc) | |
388 | { | |
389 | return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL); | |
390 | } | |
391 | ||
be06a934 | 392 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
393 | const unsigned char *in, int inl) |
394 | { | |
395 | if (ctx->encrypt) | |
396 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
397 | else | |
398 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
399 | } | |
d02b48c6 | 400 | |
581f1c84 | 401 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
402 | { |
403 | if (ctx->encrypt) | |
404 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
405 | else | |
406 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
407 | } | |
581f1c84 | 408 | |
6b691a5c | 409 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
410 | { |
411 | if (ctx->encrypt) | |
412 | return EVP_EncryptFinal(ctx, out, outl); | |
413 | else | |
414 | return EVP_DecryptFinal(ctx, out, outl); | |
415 | } | |
d02b48c6 | 416 | |
be06a934 | 417 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
418 | const unsigned char *key, const unsigned char *iv) |
419 | { | |
420 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
421 | } | |
18eda732 | 422 | |
0f113f3e MC |
423 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
424 | ENGINE *impl, const unsigned char *key, | |
425 | const unsigned char *iv) | |
426 | { | |
427 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
428 | } | |
d02b48c6 | 429 | |
4b58d9b4 P |
430 | int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
431 | const unsigned char *key, const unsigned char *iv, | |
432 | const OSSL_PARAM params[]) | |
433 | { | |
434 | return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params); | |
435 | } | |
436 | ||
be06a934 | 437 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
438 | const unsigned char *key, const unsigned char *iv) |
439 | { | |
440 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
441 | } | |
18eda732 | 442 | |
0f113f3e MC |
443 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
444 | ENGINE *impl, const unsigned char *key, | |
445 | const unsigned char *iv) | |
446 | { | |
447 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
448 | } | |
d02b48c6 | 449 | |
4b58d9b4 P |
450 | int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
451 | const unsigned char *key, const unsigned char *iv, | |
452 | const OSSL_PARAM params[]) | |
453 | { | |
454 | return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params); | |
455 | } | |
456 | ||
c3a73daf AP |
457 | /* |
458 | * According to the letter of standard difference between pointers | |
459 | * is specified to be valid only within same object. This makes | |
460 | * it formally challenging to determine if input and output buffers | |
461 | * are not partially overlapping with standard pointer arithmetic. | |
462 | */ | |
463 | #ifdef PTRDIFF_T | |
464 | # undef PTRDIFF_T | |
465 | #endif | |
466 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
467 | /* | |
468 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
469 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
470 | * difference between two pointers might be truncated to 32 bits. | |
471 | * In the context one can even wonder how comparison for | |
472 | * equality is implemented. To be on the safe side we adhere to | |
473 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
474 | */ |
475 | # define PTRDIFF_T uint64_t | |
476 | #else | |
477 | # define PTRDIFF_T size_t | |
478 | #endif | |
479 | ||
6d777689 | 480 | int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
481 | { |
482 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
483 | /* | |
484 | * Check for partially overlapping buffers. [Binary logical | |
485 | * operations are used instead of boolean to minimize number | |
486 | * of conditional branches.] | |
487 | */ | |
83151b73 AP |
488 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
489 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 490 | |
83151b73 | 491 | return overlapped; |
c3a73daf AP |
492 | } |
493 | ||
a8bf2f8f RL |
494 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
495 | unsigned char *out, int *outl, | |
496 | const unsigned char *in, int inl) | |
0f113f3e | 497 | { |
64846096 LP |
498 | int i, j, bl, cmpl = inl; |
499 | ||
500 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
501 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 502 | |
7141ba31 MC |
503 | bl = ctx->cipher->block_size; |
504 | ||
0f113f3e | 505 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 506 | /* If block size > 1 then the cipher will have to do this check */ |
6d777689 | 507 | if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { |
9311d0c4 | 508 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 509 | return 0; |
83151b73 | 510 | } |
5fc77684 | 511 | |
0f113f3e MC |
512 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
513 | if (i < 0) | |
514 | return 0; | |
515 | else | |
516 | *outl = i; | |
517 | return 1; | |
518 | } | |
519 | ||
2c236894 MC |
520 | if (inl <= 0) { |
521 | *outl = 0; | |
522 | return inl == 0; | |
523 | } | |
6d777689 | 524 | if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
9311d0c4 | 525 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 526 | return 0; |
83151b73 | 527 | } |
0f113f3e MC |
528 | |
529 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
530 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
531 | *outl = inl; | |
532 | return 1; | |
533 | } else { | |
534 | *outl = 0; | |
535 | return 0; | |
536 | } | |
537 | } | |
538 | i = ctx->buf_len; | |
0f113f3e MC |
539 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
540 | if (i != 0) { | |
3f358213 | 541 | if (bl - i > inl) { |
0f113f3e MC |
542 | memcpy(&(ctx->buf[i]), in, inl); |
543 | ctx->buf_len += inl; | |
544 | *outl = 0; | |
545 | return 1; | |
546 | } else { | |
547 | j = bl - i; | |
c9fb704c MC |
548 | |
549 | /* | |
550 | * Once we've processed the first j bytes from in, the amount of | |
551 | * data left that is a multiple of the block length is: | |
552 | * (inl - j) & ~(bl - 1) | |
553 | * We must ensure that this amount of data, plus the one block that | |
554 | * we process from ctx->buf does not exceed INT_MAX | |
555 | */ | |
556 | if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) { | |
557 | ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); | |
558 | return 0; | |
559 | } | |
0f113f3e | 560 | memcpy(&(ctx->buf[i]), in, j); |
0f113f3e MC |
561 | inl -= j; |
562 | in += j; | |
5fc77684 AP |
563 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
564 | return 0; | |
0f113f3e MC |
565 | out += bl; |
566 | *outl = bl; | |
567 | } | |
568 | } else | |
569 | *outl = 0; | |
570 | i = inl & (bl - 1); | |
571 | inl -= i; | |
572 | if (inl > 0) { | |
573 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
574 | return 0; | |
575 | *outl += inl; | |
576 | } | |
577 | ||
578 | if (i != 0) | |
579 | memcpy(ctx->buf, &(in[inl]), i); | |
580 | ctx->buf_len = i; | |
581 | return 1; | |
582 | } | |
d02b48c6 | 583 | |
a8bf2f8f RL |
584 | |
585 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
586 | const unsigned char *in, int inl) | |
587 | { | |
df05f2ce MC |
588 | int ret; |
589 | size_t soutl; | |
3b94944c | 590 | int blocksize; |
df05f2ce | 591 | |
3d4c81b0 | 592 | if (outl != NULL) { |
593 | *outl = 0; | |
594 | } else { | |
9311d0c4 | 595 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 596 | return 0; |
597 | } | |
598 | ||
a8bf2f8f RL |
599 | /* Prevent accidental use of decryption context when encrypting */ |
600 | if (!ctx->encrypt) { | |
9311d0c4 | 601 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
602 | return 0; |
603 | } | |
604 | ||
d4d89a07 | 605 | if (ctx->cipher == NULL) { |
9311d0c4 | 606 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d4d89a07 SS |
607 | return 0; |
608 | } | |
609 | ||
610 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
611 | goto legacy; |
612 | ||
30af356d | 613 | blocksize = ctx->cipher->block_size; |
3b94944c MC |
614 | |
615 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
9311d0c4 | 616 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
617 | return 0; |
618 | } | |
3b94944c MC |
619 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
620 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
621 | (size_t)inl); | |
df05f2ce | 622 | |
36e619d7 GV |
623 | if (ret) { |
624 | if (soutl > INT_MAX) { | |
9311d0c4 | 625 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
36e619d7 GV |
626 | return 0; |
627 | } | |
628 | *outl = soutl; | |
df05f2ce | 629 | } |
36e619d7 | 630 | |
df05f2ce MC |
631 | return ret; |
632 | ||
0be6cf0c | 633 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
634 | legacy: |
635 | ||
a8bf2f8f RL |
636 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
637 | } | |
638 | ||
be06a934 | 639 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
640 | { |
641 | int ret; | |
642 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
643 | return ret; | |
644 | } | |
581f1c84 DSH |
645 | |
646 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
647 | { |
648 | int n, ret; | |
649 | unsigned int i, b, bl; | |
df05f2ce | 650 | size_t soutl; |
3b94944c | 651 | int blocksize; |
0f113f3e | 652 | |
3d4c81b0 | 653 | if (outl != NULL) { |
654 | *outl = 0; | |
655 | } else { | |
9311d0c4 | 656 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 657 | return 0; |
658 | } | |
659 | ||
a8bf2f8f RL |
660 | /* Prevent accidental use of decryption context when encrypting */ |
661 | if (!ctx->encrypt) { | |
9311d0c4 | 662 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
663 | return 0; |
664 | } | |
665 | ||
4894dcad | 666 | if (ctx->cipher == NULL) { |
9311d0c4 | 667 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
4894dcad P |
668 | return 0; |
669 | } | |
670 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
671 | goto legacy; |
672 | ||
3b94944c MC |
673 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
674 | ||
675 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
9311d0c4 | 676 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
677 | return 0; |
678 | } | |
679 | ||
3b94944c MC |
680 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
681 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce | 682 | |
36e619d7 GV |
683 | if (ret) { |
684 | if (soutl > INT_MAX) { | |
9311d0c4 | 685 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
36e619d7 GV |
686 | return 0; |
687 | } | |
688 | *outl = soutl; | |
df05f2ce | 689 | } |
df05f2ce MC |
690 | |
691 | return ret; | |
692 | ||
0be6cf0c | 693 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
694 | legacy: |
695 | ||
0f113f3e MC |
696 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
697 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
698 | if (ret < 0) | |
699 | return 0; | |
700 | else | |
701 | *outl = ret; | |
702 | return 1; | |
703 | } | |
704 | ||
705 | b = ctx->cipher->block_size; | |
cbe29648 | 706 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
707 | if (b == 1) { |
708 | *outl = 0; | |
709 | return 1; | |
710 | } | |
711 | bl = ctx->buf_len; | |
712 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
713 | if (bl) { | |
9311d0c4 | 714 | ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); |
0f113f3e MC |
715 | return 0; |
716 | } | |
717 | *outl = 0; | |
718 | return 1; | |
719 | } | |
720 | ||
721 | n = b - bl; | |
722 | for (i = bl; i < b; i++) | |
723 | ctx->buf[i] = n; | |
724 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
725 | ||
726 | if (ret) | |
727 | *outl = b; | |
728 | ||
729 | return ret; | |
730 | } | |
d02b48c6 | 731 | |
be06a934 | 732 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
733 | const unsigned char *in, int inl) |
734 | { | |
df05f2ce | 735 | int fix_len, cmpl = inl, ret; |
0f113f3e | 736 | unsigned int b; |
df05f2ce | 737 | size_t soutl; |
3b94944c | 738 | int blocksize; |
0f113f3e | 739 | |
3d4c81b0 | 740 | if (outl != NULL) { |
741 | *outl = 0; | |
742 | } else { | |
9311d0c4 | 743 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 744 | return 0; |
745 | } | |
746 | ||
a8bf2f8f RL |
747 | /* Prevent accidental use of encryption context when decrypting */ |
748 | if (ctx->encrypt) { | |
9311d0c4 | 749 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
750 | return 0; |
751 | } | |
752 | ||
d2c2e49e | 753 | if (ctx->cipher == NULL) { |
9311d0c4 | 754 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d2c2e49e P |
755 | return 0; |
756 | } | |
757 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
758 | goto legacy; |
759 | ||
3b94944c MC |
760 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
761 | ||
762 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
9311d0c4 | 763 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
764 | return 0; |
765 | } | |
3b94944c MC |
766 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
767 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
768 | (size_t)inl); | |
df05f2ce MC |
769 | |
770 | if (ret) { | |
771 | if (soutl > INT_MAX) { | |
9311d0c4 | 772 | ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
df05f2ce MC |
773 | return 0; |
774 | } | |
775 | *outl = soutl; | |
776 | } | |
777 | ||
778 | return ret; | |
779 | ||
0be6cf0c | 780 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
781 | legacy: |
782 | ||
7141ba31 MC |
783 | b = ctx->cipher->block_size; |
784 | ||
64846096 LP |
785 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
786 | cmpl = (cmpl + 7) / 8; | |
787 | ||
0f113f3e | 788 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
6d777689 | 789 | if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { |
9311d0c4 | 790 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 791 | return 0; |
83151b73 | 792 | } |
5fc77684 | 793 | |
0f113f3e MC |
794 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
795 | if (fix_len < 0) { | |
796 | *outl = 0; | |
797 | return 0; | |
798 | } else | |
799 | *outl = fix_len; | |
800 | return 1; | |
801 | } | |
802 | ||
2c236894 MC |
803 | if (inl <= 0) { |
804 | *outl = 0; | |
805 | return inl == 0; | |
806 | } | |
807 | ||
0f113f3e | 808 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 809 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 810 | |
cbe29648 | 811 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
812 | |
813 | if (ctx->final_used) { | |
5fc77684 AP |
814 | /* see comment about PTRDIFF_T comparison above */ |
815 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
6d777689 | 816 | || ossl_is_partially_overlapping(out, in, b)) { |
9311d0c4 | 817 | ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 818 | return 0; |
83151b73 | 819 | } |
c9fb704c MC |
820 | /* |
821 | * final_used is only ever set if buf_len is 0. Therefore the maximum | |
822 | * length output we will ever see from evp_EncryptDecryptUpdate is | |
823 | * the maximum multiple of the block length that is <= inl, or just: | |
824 | * inl & ~(b - 1) | |
825 | * Since final_used has been set then the final output length is: | |
826 | * (inl & ~(b - 1)) + b | |
827 | * This must never exceed INT_MAX | |
828 | */ | |
829 | if ((inl & ~(b - 1)) > INT_MAX - b) { | |
830 | ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); | |
831 | return 0; | |
832 | } | |
0f113f3e MC |
833 | memcpy(out, ctx->final, b); |
834 | out += b; | |
835 | fix_len = 1; | |
836 | } else | |
837 | fix_len = 0; | |
838 | ||
a8bf2f8f | 839 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
840 | return 0; |
841 | ||
842 | /* | |
843 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
844 | * copy of this last block | |
845 | */ | |
846 | if (b > 1 && !ctx->buf_len) { | |
847 | *outl -= b; | |
848 | ctx->final_used = 1; | |
849 | memcpy(ctx->final, &out[*outl], b); | |
850 | } else | |
851 | ctx->final_used = 0; | |
852 | ||
853 | if (fix_len) | |
854 | *outl += b; | |
855 | ||
856 | return 1; | |
857 | } | |
d02b48c6 | 858 | |
6b691a5c | 859 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
860 | { |
861 | int ret; | |
862 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
863 | return ret; | |
864 | } | |
581f1c84 DSH |
865 | |
866 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
867 | { |
868 | int i, n; | |
869 | unsigned int b; | |
df05f2ce MC |
870 | size_t soutl; |
871 | int ret; | |
3b94944c | 872 | int blocksize; |
a8bf2f8f | 873 | |
3d4c81b0 | 874 | if (outl != NULL) { |
875 | *outl = 0; | |
876 | } else { | |
9311d0c4 | 877 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
3d4c81b0 | 878 | return 0; |
879 | } | |
880 | ||
a8bf2f8f RL |
881 | /* Prevent accidental use of encryption context when decrypting */ |
882 | if (ctx->encrypt) { | |
9311d0c4 | 883 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
a8bf2f8f RL |
884 | return 0; |
885 | } | |
886 | ||
d4d89a07 | 887 | if (ctx->cipher == NULL) { |
9311d0c4 | 888 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
d4d89a07 SS |
889 | return 0; |
890 | } | |
891 | ||
892 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
893 | goto legacy; |
894 | ||
3b94944c MC |
895 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
896 | ||
897 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
9311d0c4 | 898 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
899 | return 0; |
900 | } | |
901 | ||
3b94944c MC |
902 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
903 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
904 | |
905 | if (ret) { | |
906 | if (soutl > INT_MAX) { | |
9311d0c4 | 907 | ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
df05f2ce MC |
908 | return 0; |
909 | } | |
910 | *outl = soutl; | |
911 | } | |
912 | ||
913 | return ret; | |
914 | ||
0be6cf0c | 915 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
916 | legacy: |
917 | ||
0f113f3e | 918 | *outl = 0; |
0f113f3e MC |
919 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
920 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
921 | if (i < 0) | |
922 | return 0; | |
923 | else | |
924 | *outl = i; | |
925 | return 1; | |
926 | } | |
927 | ||
928 | b = ctx->cipher->block_size; | |
929 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
930 | if (ctx->buf_len) { | |
9311d0c4 | 931 | ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); |
0f113f3e MC |
932 | return 0; |
933 | } | |
934 | *outl = 0; | |
935 | return 1; | |
936 | } | |
937 | if (b > 1) { | |
938 | if (ctx->buf_len || !ctx->final_used) { | |
9311d0c4 | 939 | ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH); |
26a7d938 | 940 | return 0; |
0f113f3e | 941 | } |
cbe29648 | 942 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
943 | |
944 | /* | |
945 | * The following assumes that the ciphertext has been authenticated. | |
946 | * Otherwise it provides a padding oracle. | |
947 | */ | |
948 | n = ctx->final[b - 1]; | |
949 | if (n == 0 || n > (int)b) { | |
9311d0c4 | 950 | ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); |
26a7d938 | 951 | return 0; |
0f113f3e MC |
952 | } |
953 | for (i = 0; i < n; i++) { | |
954 | if (ctx->final[--b] != n) { | |
9311d0c4 | 955 | ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); |
26a7d938 | 956 | return 0; |
0f113f3e MC |
957 | } |
958 | } | |
959 | n = ctx->cipher->block_size - n; | |
960 | for (i = 0; i < n; i++) | |
961 | out[i] = ctx->final[i]; | |
962 | *outl = n; | |
963 | } else | |
964 | *outl = 0; | |
208fb891 | 965 | return 1; |
0f113f3e | 966 | } |
d02b48c6 | 967 | |
6343829a | 968 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 969 | { |
d23adad1 MC |
970 | if (c->cipher->prov != NULL) { |
971 | int ok; | |
972 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
973 | size_t len = keylen; | |
459b15d4 | 974 | |
d23adad1 MC |
975 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
976 | return 1; | |
977 | ||
978 | /* Check the cipher actually understands this parameter */ | |
979 | if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher), | |
980 | OSSL_CIPHER_PARAM_KEYLEN) == NULL) | |
981 | return 0; | |
982 | ||
983 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); | |
984 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params); | |
13273237 | 985 | |
d23adad1 MC |
986 | return ok > 0 ? 1 : 0; |
987 | } | |
13273237 | 988 | |
0be6cf0c | 989 | /* Code below to be removed when legacy support is dropped. */ |
d23adad1 MC |
990 | |
991 | /* | |
992 | * Note there have never been any built-in ciphers that define this flag | |
993 | * since it was first introduced. | |
994 | */ | |
0f113f3e MC |
995 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
996 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 997 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
998 | return 1; |
999 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
1000 | c->key_len = keylen; | |
1001 | return 1; | |
1002 | } | |
9311d0c4 | 1003 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH); |
0f113f3e MC |
1004 | return 0; |
1005 | } | |
49528751 | 1006 | |
f2e5ca84 | 1007 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 1008 | { |
13273237 | 1009 | int ok; |
459b15d4 | 1010 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
1c3ace68 | 1011 | unsigned int pd = pad; |
13273237 | 1012 | |
0f113f3e MC |
1013 | if (pad) |
1014 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
1015 | else | |
1016 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 1017 | |
719bc0e8 SL |
1018 | if (ctx->cipher != NULL && ctx->cipher->prov == NULL) |
1019 | return 1; | |
1c3ace68 | 1020 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
459b15d4 SL |
1021 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1022 | ||
13273237 | 1023 | return ok != 0; |
0f113f3e | 1024 | } |
f2e5ca84 | 1025 | |
49528751 DSH |
1026 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
1027 | { | |
e870791a | 1028 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 | 1029 | int set_params = 1; |
1c3ace68 | 1030 | size_t sz = arg; |
6a41156c | 1031 | unsigned int i; |
0d2bfe52 SL |
1032 | OSSL_PARAM params[4] = { |
1033 | OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END | |
1034 | }; | |
d91f4568 | 1035 | |
459b15d4 | 1036 | if (ctx == NULL || ctx->cipher == NULL) { |
9311d0c4 | 1037 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
0f113f3e MC |
1038 | return 0; |
1039 | } | |
1040 | ||
13273237 RL |
1041 | if (ctx->cipher->prov == NULL) |
1042 | goto legacy; | |
1043 | ||
1044 | switch (type) { | |
1045 | case EVP_CTRL_SET_KEY_LENGTH: | |
1c3ace68 | 1046 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
13273237 RL |
1047 | break; |
1048 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
4a42e264 SL |
1049 | set_params = 0; |
1050 | params[0] = | |
1051 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1c3ace68 | 1052 | ptr, sz); |
4a42e264 SL |
1053 | break; |
1054 | ||
d6d74cf4 RL |
1055 | case EVP_CTRL_INIT: |
1056 | /* | |
0be6cf0c | 1057 | * EVP_CTRL_INIT is purely legacy, no provider counterpart. |
d6d74cf4 RL |
1058 | * As a matter of fact, this should be dead code, but some caller |
1059 | * might still do a direct control call with this command, so... | |
1060 | * Legacy methods return 1 except for exceptional circumstances, so | |
1061 | * we do the same here to not be disruptive. | |
1062 | */ | |
1063 | return 1; | |
13273237 | 1064 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
459b15d4 | 1065 | default: |
6a36f209 | 1066 | goto end; |
459b15d4 SL |
1067 | case EVP_CTRL_AEAD_SET_IVLEN: |
1068 | if (arg < 0) | |
1069 | return 0; | |
1c3ace68 | 1070 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
13273237 | 1071 | break; |
11b44359 SL |
1072 | case EVP_CTRL_AEAD_SET_IV_FIXED: |
1073 | params[0] = OSSL_PARAM_construct_octet_string( | |
1074 | OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz); | |
1075 | break; | |
1076 | case EVP_CTRL_GCM_IV_GEN: | |
1077 | set_params = 0; | |
1078 | if (arg < 0) | |
1079 | sz = 0; /* special case that uses the iv length */ | |
1080 | params[0] = OSSL_PARAM_construct_octet_string( | |
1081 | OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz); | |
1082 | break; | |
1083 | case EVP_CTRL_GCM_SET_IV_INV: | |
1084 | if (arg < 0) | |
1085 | return 0; | |
1086 | params[0] = OSSL_PARAM_construct_octet_string( | |
1087 | OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz); | |
459b15d4 | 1088 | break; |
6a41156c SL |
1089 | case EVP_CTRL_GET_RC5_ROUNDS: |
1090 | set_params = 0; /* Fall thru */ | |
1091 | case EVP_CTRL_SET_RC5_ROUNDS: | |
1092 | if (arg < 0) | |
1093 | return 0; | |
1094 | i = (unsigned int)arg; | |
1095 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i); | |
1096 | break; | |
eb173822 SL |
1097 | case EVP_CTRL_SET_SPEED: |
1098 | if (arg < 0) | |
1099 | return 0; | |
1100 | i = (unsigned int)arg; | |
1101 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i); | |
1102 | break; | |
459b15d4 | 1103 | case EVP_CTRL_AEAD_GET_TAG: |
1c3ace68 SL |
1104 | set_params = 0; /* Fall thru */ |
1105 | case EVP_CTRL_AEAD_SET_TAG: | |
459b15d4 | 1106 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
1c3ace68 | 1107 | ptr, sz); |
459b15d4 SL |
1108 | break; |
1109 | case EVP_CTRL_AEAD_TLS1_AAD: | |
0d2bfe52 | 1110 | /* This one does a set and a get - since it returns a size */ |
459b15d4 SL |
1111 | params[0] = |
1112 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1c3ace68 | 1113 | ptr, sz); |
459b15d4 SL |
1114 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1115 | if (ret <= 0) | |
6a36f209 | 1116 | goto end; |
459b15d4 SL |
1117 | params[0] = |
1118 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1119 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1120 | if (ret <= 0) | |
6a36f209 | 1121 | goto end; |
459b15d4 | 1122 | return sz; |
f816aa47 SL |
1123 | #ifndef OPENSSL_NO_RC2 |
1124 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
1125 | set_params = 0; /* Fall thru */ | |
1126 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
1127 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz); | |
1128 | break; | |
1129 | #endif /* OPENSSL_NO_RC2 */ | |
0d2bfe52 SL |
1130 | #if !defined(OPENSSL_NO_MULTIBLOCK) |
1131 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE: | |
1132 | params[0] = OSSL_PARAM_construct_size_t( | |
1133 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz); | |
1134 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1135 | if (ret <= 0) | |
1136 | return 0; | |
1137 | ||
1138 | params[0] = OSSL_PARAM_construct_size_t( | |
1139 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz); | |
1140 | params[1] = OSSL_PARAM_construct_end(); | |
1141 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1142 | if (ret <= 0) | |
1143 | return 0; | |
1144 | return sz; | |
1145 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: { | |
1146 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1147 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1148 | ||
1149 | if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) | |
1150 | return 0; | |
1151 | ||
1152 | params[0] = OSSL_PARAM_construct_octet_string( | |
1153 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len); | |
1154 | params[1] = OSSL_PARAM_construct_uint( | |
1155 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1156 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1157 | if (ret <= 0) | |
1158 | return ret; | |
1159 | /* Retrieve the return values changed by the set */ | |
1160 | params[0] = OSSL_PARAM_construct_size_t( | |
1161 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz); | |
1162 | params[1] = OSSL_PARAM_construct_uint( | |
1163 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1164 | params[2] = OSSL_PARAM_construct_end(); | |
1165 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1166 | if (ret <= 0) | |
1167 | return 0; | |
1168 | return sz; | |
1169 | } | |
1170 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: { | |
1171 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1172 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1173 | ||
1174 | params[0] = OSSL_PARAM_construct_octet_string( | |
1175 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len); | |
1176 | ||
1177 | params[1] = OSSL_PARAM_construct_octet_string( | |
1178 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp, | |
1179 | p->len); | |
1180 | params[2] = OSSL_PARAM_construct_uint( | |
1181 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1182 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1183 | if (ret <= 0) | |
1184 | return ret; | |
1185 | params[0] = OSSL_PARAM_construct_size_t( | |
1186 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz); | |
1187 | params[1] = OSSL_PARAM_construct_end(); | |
1188 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1189 | if (ret <= 0) | |
1190 | return 0; | |
1191 | return sz; | |
1192 | } | |
1193 | #endif /* OPENSSL_NO_MULTIBLOCK */ | |
1194 | case EVP_CTRL_AEAD_SET_MAC_KEY: | |
1195 | if (arg < 0) | |
1196 | return -1; | |
1197 | params[0] = OSSL_PARAM_construct_octet_string( | |
1198 | OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz); | |
1199 | break; | |
13273237 | 1200 | } |
459b15d4 SL |
1201 | |
1202 | if (set_params) | |
1203 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1204 | else | |
1205 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
6a36f209 | 1206 | goto end; |
13273237 | 1207 | |
0be6cf0c | 1208 | /* Code below to be removed when legacy support is dropped. */ |
459b15d4 SL |
1209 | legacy: |
1210 | if (ctx->cipher->ctrl == NULL) { | |
9311d0c4 | 1211 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED); |
0f113f3e MC |
1212 | return 0; |
1213 | } | |
1214 | ||
1215 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
552be00d | 1216 | |
6a36f209 | 1217 | end: |
e870791a | 1218 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
9311d0c4 | 1219 | ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); |
0f113f3e MC |
1220 | return 0; |
1221 | } | |
1222 | return ret; | |
49528751 | 1223 | } |
216659eb | 1224 | |
ae3ff60e RL |
1225 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
1226 | { | |
1227 | if (cipher != NULL && cipher->get_params != NULL) | |
1228 | return cipher->get_params(params); | |
1229 | return 0; | |
1230 | } | |
1231 | ||
1232 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1233 | { | |
92d9d0ae RL |
1234 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) |
1235 | return ctx->cipher->set_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1236 | return 0; |
1237 | } | |
1238 | ||
1239 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1240 | { | |
92d9d0ae RL |
1241 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
1242 | return ctx->cipher->get_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1243 | return 0; |
1244 | } | |
1245 | ||
1246 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1247 | { | |
1248 | if (cipher != NULL && cipher->gettable_params != NULL) | |
18ec26ba P |
1249 | return cipher->gettable_params( |
1250 | ossl_provider_ctx(EVP_CIPHER_provider(cipher))); | |
ae3ff60e RL |
1251 | return NULL; |
1252 | } | |
1253 | ||
41f7ecf3 | 1254 | const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e | 1255 | { |
292b4184 P |
1256 | void *alg; |
1257 | ||
1258 | if (cipher != NULL && cipher->settable_ctx_params != NULL) { | |
1259 | alg = ossl_provider_ctx(EVP_CIPHER_provider(cipher)); | |
1260 | return cipher->settable_ctx_params(NULL, alg); | |
1261 | } | |
ae3ff60e RL |
1262 | return NULL; |
1263 | } | |
1264 | ||
41f7ecf3 | 1265 | const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e | 1266 | { |
292b4184 P |
1267 | void *alg; |
1268 | ||
1269 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) { | |
1270 | alg = ossl_provider_ctx(EVP_CIPHER_provider(cipher)); | |
1271 | return cipher->gettable_ctx_params(NULL, alg); | |
1272 | } | |
1273 | return NULL; | |
1274 | } | |
1275 | ||
1276 | const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx) | |
1277 | { | |
1278 | void *alg; | |
1279 | ||
1280 | if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) { | |
1281 | alg = ossl_provider_ctx(EVP_CIPHER_provider(cctx->cipher)); | |
1282 | return cctx->cipher->settable_ctx_params(cctx->provctx, alg); | |
1283 | } | |
1284 | return NULL; | |
1285 | } | |
1286 | ||
1287 | const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx) | |
1288 | { | |
1289 | void *alg; | |
1290 | ||
1291 | if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) { | |
1292 | alg = ossl_provider_ctx(EVP_CIPHER_provider(cctx->cipher)); | |
1293 | return cctx->cipher->gettable_ctx_params(cctx->provctx, alg); | |
1294 | } | |
ae3ff60e RL |
1295 | return NULL; |
1296 | } | |
1297 | ||
11eef7e7 | 1298 | #ifndef FIPS_MODULE |
b4250010 | 1299 | static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx) |
11eef7e7 SL |
1300 | { |
1301 | const EVP_CIPHER *cipher = ctx->cipher; | |
1302 | const OSSL_PROVIDER *prov; | |
1303 | ||
1304 | if (cipher == NULL) | |
1305 | return NULL; | |
1306 | ||
1307 | prov = EVP_CIPHER_provider(cipher); | |
a829b735 | 1308 | return ossl_provider_libctx(prov); |
11eef7e7 SL |
1309 | } |
1310 | #endif | |
1311 | ||
216659eb | 1312 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e MC |
1313 | { |
1314 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1315 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4a42e264 | 1316 | |
f844f9eb | 1317 | #ifdef FIPS_MODULE |
4a42e264 SL |
1318 | return 0; |
1319 | #else | |
1320 | { | |
1321 | int kl; | |
b4250010 | 1322 | OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx); |
4a42e264 SL |
1323 | |
1324 | kl = EVP_CIPHER_CTX_key_length(ctx); | |
11eef7e7 | 1325 | if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl) <= 0) |
4a42e264 SL |
1326 | return 0; |
1327 | return 1; | |
1328 | } | |
f844f9eb | 1329 | #endif /* FIPS_MODULE */ |
0f113f3e | 1330 | } |
216659eb | 1331 | |
c2bf7208 | 1332 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1333 | { |
1334 | if ((in == NULL) || (in->cipher == NULL)) { | |
9311d0c4 | 1335 | ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED); |
0f113f3e MC |
1336 | return 0; |
1337 | } | |
df05f2ce MC |
1338 | |
1339 | if (in->cipher->prov == NULL) | |
1340 | goto legacy; | |
1341 | ||
1342 | if (in->cipher->dupctx == NULL) { | |
9311d0c4 | 1343 | ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
df05f2ce MC |
1344 | return 0; |
1345 | } | |
1346 | ||
1347 | EVP_CIPHER_CTX_reset(out); | |
1348 | ||
1349 | *out = *in; | |
1350 | out->provctx = NULL; | |
1351 | ||
70c35fd1 | 1352 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1353 | out->fetched_cipher = NULL; |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | out->provctx = in->cipher->dupctx(in->provctx); | |
1358 | if (out->provctx == NULL) { | |
9311d0c4 | 1359 | ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
df05f2ce MC |
1360 | return 0; |
1361 | } | |
1362 | ||
1363 | return 1; | |
1364 | ||
0be6cf0c | 1365 | /* Code below to be removed when legacy support is dropped. */ |
df05f2ce MC |
1366 | legacy: |
1367 | ||
f844f9eb | 1368 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
1369 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1370 | if (in->engine && !ENGINE_init(in->engine)) { | |
9311d0c4 | 1371 | ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB); |
0f113f3e MC |
1372 | return 0; |
1373 | } | |
c2bf7208 DSH |
1374 | #endif |
1375 | ||
c0ca39bd | 1376 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1377 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1378 | |
1379 | if (in->cipher_data && in->cipher->ctx_size) { | |
1380 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1381 | if (out->cipher_data == NULL) { |
273a0218 | 1382 | out->cipher = NULL; |
9311d0c4 | 1383 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1384 | return 0; |
1385 | } | |
1386 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1387 | } | |
1388 | ||
1389 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1390 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1391 | out->cipher = NULL; | |
9311d0c4 | 1392 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
273a0218 BE |
1393 | return 0; |
1394 | } | |
0f113f3e MC |
1395 | return 1; |
1396 | } | |
df05f2ce | 1397 | |
550f974a RL |
1398 | EVP_CIPHER *evp_cipher_new(void) |
1399 | { | |
1400 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1401 | ||
1402 | if (cipher != NULL) { | |
1403 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1404 | if (cipher->lock == NULL) { | |
1405 | OPENSSL_free(cipher); | |
1406 | return NULL; | |
1407 | } | |
1408 | cipher->refcnt = 1; | |
1409 | } | |
1410 | return cipher; | |
1411 | } | |
1412 | ||
32040838 RL |
1413 | /* |
1414 | * FIPS module note: since internal fetches will be entirely | |
1415 | * provider based, we know that none of its code depends on legacy | |
1416 | * NIDs or any functionality that use them. | |
1417 | */ | |
f844f9eb | 1418 | #ifndef FIPS_MODULE |
83abd33c | 1419 | /* After removal of legacy support get rid of the need for legacy NIDs */ |
32040838 RL |
1420 | static void set_legacy_nid(const char *name, void *vlegacy_nid) |
1421 | { | |
1422 | int nid; | |
1423 | int *legacy_nid = vlegacy_nid; | |
6a835fcf RL |
1424 | /* |
1425 | * We use lowest level function to get the associated method, because | |
1426 | * higher level functions such as EVP_get_cipherbyname() have changed | |
1427 | * to look at providers too. | |
1428 | */ | |
1429 | const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH); | |
32040838 RL |
1430 | |
1431 | if (*legacy_nid == -1) /* We found a clash already */ | |
1432 | return; | |
6a835fcf | 1433 | if (legacy_method == NULL) |
32040838 | 1434 | return; |
6a835fcf | 1435 | nid = EVP_CIPHER_nid(legacy_method); |
32040838 RL |
1436 | if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
1437 | *legacy_nid = -1; | |
1438 | return; | |
1439 | } | |
1440 | *legacy_nid = nid; | |
1441 | } | |
1442 | #endif | |
1443 | ||
309a78aa RL |
1444 | static void *evp_cipher_from_algorithm(const int name_id, |
1445 | const OSSL_ALGORITHM *algodef, | |
1446 | OSSL_PROVIDER *prov) | |
df05f2ce | 1447 | { |
309a78aa | 1448 | const OSSL_DISPATCH *fns = algodef->implementation; |
df05f2ce MC |
1449 | EVP_CIPHER *cipher = NULL; |
1450 | int fnciphcnt = 0, fnctxcnt = 0; | |
1451 | ||
f7c16d48 | 1452 | if ((cipher = evp_cipher_new()) == NULL) { |
9311d0c4 | 1453 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
df05f2ce | 1454 | return NULL; |
6b9e3724 | 1455 | } |
df05f2ce | 1456 | |
f844f9eb | 1457 | #ifndef FIPS_MODULE |
32040838 | 1458 | cipher->nid = NID_undef; |
d84f5515 MC |
1459 | if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid) |
1460 | || cipher->nid == -1) { | |
32040838 RL |
1461 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); |
1462 | EVP_CIPHER_free(cipher); | |
1463 | return NULL; | |
f7c16d48 | 1464 | } |
ed71e917 MC |
1465 | #endif |
1466 | ||
32040838 | 1467 | cipher->name_id = name_id; |
309a78aa | 1468 | cipher->description = algodef->algorithm_description; |
32040838 | 1469 | |
df05f2ce MC |
1470 | for (; fns->function_id != 0; fns++) { |
1471 | switch (fns->function_id) { | |
1472 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1473 | if (cipher->newctx != NULL) | |
1474 | break; | |
363b1e5d | 1475 | cipher->newctx = OSSL_FUNC_cipher_newctx(fns); |
df05f2ce MC |
1476 | fnctxcnt++; |
1477 | break; | |
1478 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1479 | if (cipher->einit != NULL) | |
1480 | break; | |
363b1e5d | 1481 | cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns); |
df05f2ce MC |
1482 | fnciphcnt++; |
1483 | break; | |
1484 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1485 | if (cipher->dinit != NULL) | |
1486 | break; | |
363b1e5d | 1487 | cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns); |
df05f2ce MC |
1488 | fnciphcnt++; |
1489 | break; | |
1490 | case OSSL_FUNC_CIPHER_UPDATE: | |
1491 | if (cipher->cupdate != NULL) | |
1492 | break; | |
363b1e5d | 1493 | cipher->cupdate = OSSL_FUNC_cipher_update(fns); |
df05f2ce MC |
1494 | fnciphcnt++; |
1495 | break; | |
1496 | case OSSL_FUNC_CIPHER_FINAL: | |
1497 | if (cipher->cfinal != NULL) | |
1498 | break; | |
363b1e5d | 1499 | cipher->cfinal = OSSL_FUNC_cipher_final(fns); |
df05f2ce MC |
1500 | fnciphcnt++; |
1501 | break; | |
718b133a MC |
1502 | case OSSL_FUNC_CIPHER_CIPHER: |
1503 | if (cipher->ccipher != NULL) | |
1504 | break; | |
363b1e5d | 1505 | cipher->ccipher = OSSL_FUNC_cipher_cipher(fns); |
718b133a | 1506 | break; |
df05f2ce MC |
1507 | case OSSL_FUNC_CIPHER_FREECTX: |
1508 | if (cipher->freectx != NULL) | |
1509 | break; | |
363b1e5d | 1510 | cipher->freectx = OSSL_FUNC_cipher_freectx(fns); |
df05f2ce MC |
1511 | fnctxcnt++; |
1512 | break; | |
1513 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1514 | if (cipher->dupctx != NULL) | |
1515 | break; | |
363b1e5d | 1516 | cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns); |
df05f2ce | 1517 | break; |
df05f2ce MC |
1518 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1519 | if (cipher->get_params != NULL) | |
1520 | break; | |
363b1e5d | 1521 | cipher->get_params = OSSL_FUNC_cipher_get_params(fns); |
df05f2ce | 1522 | break; |
92d9d0ae RL |
1523 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
1524 | if (cipher->get_ctx_params != NULL) | |
718b133a | 1525 | break; |
363b1e5d | 1526 | cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns); |
718b133a | 1527 | break; |
92d9d0ae RL |
1528 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
1529 | if (cipher->set_ctx_params != NULL) | |
df05f2ce | 1530 | break; |
363b1e5d | 1531 | cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns); |
df05f2ce | 1532 | break; |
ae3ff60e RL |
1533 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
1534 | if (cipher->gettable_params != NULL) | |
1535 | break; | |
363b1e5d | 1536 | cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns); |
ae3ff60e RL |
1537 | break; |
1538 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1539 | if (cipher->gettable_ctx_params != NULL) | |
1540 | break; | |
1541 | cipher->gettable_ctx_params = | |
363b1e5d | 1542 | OSSL_FUNC_cipher_gettable_ctx_params(fns); |
ae3ff60e RL |
1543 | break; |
1544 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1545 | if (cipher->settable_ctx_params != NULL) | |
1546 | break; | |
1547 | cipher->settable_ctx_params = | |
363b1e5d | 1548 | OSSL_FUNC_cipher_settable_ctx_params(fns); |
ae3ff60e | 1549 | break; |
df05f2ce MC |
1550 | } |
1551 | } | |
718b133a MC |
1552 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1553 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1554 | || fnctxcnt != 2) { |
df05f2ce MC |
1555 | /* |
1556 | * In order to be a consistent set of functions we must have at least | |
1557 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1558 | * functions, or a single "cipher" function. In all cases we need both |
1559 | * the "newctx" and "freectx" functions. | |
df05f2ce | 1560 | */ |
550f974a | 1561 | EVP_CIPHER_free(cipher); |
9311d0c4 | 1562 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
df05f2ce MC |
1563 | return NULL; |
1564 | } | |
1565 | cipher->prov = prov; | |
1566 | if (prov != NULL) | |
7c95390e | 1567 | ossl_provider_up_ref(prov); |
df05f2ce | 1568 | |
ae69da05 MC |
1569 | if (!evp_cipher_cache_constants(cipher)) { |
1570 | EVP_CIPHER_free(cipher); | |
1571 | ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED); | |
1572 | cipher = NULL; | |
1573 | } | |
1574 | ||
df05f2ce MC |
1575 | return cipher; |
1576 | } | |
1577 | ||
70c35fd1 | 1578 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1579 | { |
70c35fd1 | 1580 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1581 | } |
1582 | ||
1583 | static void evp_cipher_free(void *cipher) | |
1584 | { | |
550f974a | 1585 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1586 | } |
1587 | ||
b4250010 | 1588 | EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, |
df05f2ce MC |
1589 | const char *properties) |
1590 | { | |
0211740f RL |
1591 | EVP_CIPHER *cipher = |
1592 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
309a78aa | 1593 | evp_cipher_from_algorithm, evp_cipher_up_ref, |
0211740f RL |
1594 | evp_cipher_free); |
1595 | ||
0211740f | 1596 | return cipher; |
df05f2ce | 1597 | } |
c540f00f | 1598 | |
550f974a RL |
1599 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
1600 | { | |
1601 | int ref = 0; | |
1602 | ||
1603 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
1604 | return 1; | |
1605 | } | |
1606 | ||
1607 | void EVP_CIPHER_free(EVP_CIPHER *cipher) | |
1608 | { | |
1609 | int i; | |
1610 | ||
1611 | if (cipher == NULL) | |
1612 | return; | |
1613 | ||
1614 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1615 | if (i > 0) | |
1616 | return; | |
1617 | ossl_provider_free(cipher->prov); | |
550f974a RL |
1618 | CRYPTO_THREAD_lock_free(cipher->lock); |
1619 | OPENSSL_free(cipher); | |
1620 | } | |
1621 | ||
b4250010 | 1622 | void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx, |
251e610c RL |
1623 | void (*fn)(EVP_CIPHER *mac, void *arg), |
1624 | void *arg) | |
c540f00f RL |
1625 | { |
1626 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1627 | (void (*)(void *, void *))fn, arg, | |
309a78aa | 1628 | evp_cipher_from_algorithm, evp_cipher_free); |
c540f00f | 1629 | } |