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Commit | Line | Data |
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62867571 | 1 | /* |
b0edda11 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
c3a73daf | 11 | #include <assert.h> |
b39fc560 | 12 | #include "internal/cryptlib.h" |
ec577822 | 13 | #include <openssl/evp.h> |
7f060601 | 14 | #include <openssl/err.h> |
3a87a9b9 | 15 | #include <openssl/rand.h> |
6decf943 | 16 | #include <openssl/rand_drbg.h> |
3c27208f | 17 | #include <openssl/engine.h> |
df05f2ce MC |
18 | #include <openssl/params.h> |
19 | #include <openssl/core_names.h> | |
135727ab | 20 | #include "internal/evp_int.h" |
df05f2ce | 21 | #include "internal/provider.h" |
57ae2e24 | 22 | #include "evp_locl.h" |
d02b48c6 | 23 | |
df05f2ce | 24 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) |
0f113f3e | 25 | { |
df05f2ce | 26 | if (ctx == NULL) |
8baf9968 | 27 | return 1; |
df05f2ce MC |
28 | |
29 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) | |
30 | goto legacy; | |
31 | ||
32 | if (ctx->provctx != NULL) { | |
33 | if (ctx->cipher->freectx != NULL) | |
34 | ctx->cipher->freectx(ctx->provctx); | |
35 | ctx->provctx = NULL; | |
36 | } | |
37 | if (ctx->fetched_cipher != NULL) | |
38 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
39 | memset(ctx, 0, sizeof(*ctx)); | |
40 | ||
41 | return 1; | |
42 | ||
43 | /* TODO(3.0): Remove legacy code below */ | |
44 | legacy: | |
45 | ||
46 | if (ctx->cipher != NULL) { | |
47 | if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) | |
8baf9968 RL |
48 | return 0; |
49 | /* Cleanse cipher context data */ | |
df05f2ce MC |
50 | if (ctx->cipher_data && ctx->cipher->ctx_size) |
51 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
8baf9968 | 52 | } |
df05f2ce | 53 | OPENSSL_free(ctx->cipher_data); |
8baf9968 | 54 | #ifndef OPENSSL_NO_ENGINE |
df05f2ce | 55 | ENGINE_finish(ctx->engine); |
8baf9968 | 56 | #endif |
df05f2ce | 57 | memset(ctx, 0, sizeof(*ctx)); |
8baf9968 | 58 | return 1; |
0f113f3e | 59 | } |
d02b48c6 | 60 | |
b40228a6 | 61 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) |
0f113f3e | 62 | { |
8baf9968 RL |
63 | return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX)); |
64 | } | |
65 | ||
66 | void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) | |
67 | { | |
68 | EVP_CIPHER_CTX_reset(ctx); | |
69 | OPENSSL_free(ctx); | |
0f113f3e | 70 | } |
581f1c84 | 71 | |
360370d9 | 72 | int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
73 | const unsigned char *key, const unsigned char *iv, int enc) |
74 | { | |
ffd23209 KR |
75 | if (cipher != NULL) |
76 | EVP_CIPHER_CTX_reset(ctx); | |
0f113f3e MC |
77 | return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc); |
78 | } | |
79 | ||
80 | int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
81 | ENGINE *impl, const unsigned char *key, | |
82 | const unsigned char *iv, int enc) | |
83 | { | |
df05f2ce MC |
84 | EVP_CIPHER *provciph = NULL; |
85 | ENGINE *tmpimpl = NULL; | |
86 | const EVP_CIPHER *tmpcipher; | |
87 | ||
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) { | |
102 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | /* TODO(3.0): Legacy work around code below. Remove this */ | |
107 | ||
0b13e9f0 | 108 | #ifndef OPENSSL_NO_ENGINE |
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 | |
129 | || impl != NULL | |
130 | || tmpimpl != NULL) { | |
131 | if (ctx->cipher == ctx->fetched_cipher) | |
132 | ctx->cipher = NULL; | |
133 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
134 | ctx->fetched_cipher = NULL; | |
135 | goto legacy; | |
136 | } | |
137 | ||
138 | tmpcipher = (cipher == NULL) ? ctx->cipher : cipher; | |
139 | ||
140 | if (tmpcipher->prov == NULL) { | |
141 | switch(tmpcipher->nid) { | |
aab26e6f | 142 | case NID_aes_256_ecb: |
f4a129bb MC |
143 | case NID_aes_192_ecb: |
144 | case NID_aes_128_ecb: | |
718b133a MC |
145 | case NID_aes_256_cbc: |
146 | case NID_aes_192_cbc: | |
147 | case NID_aes_128_cbc: | |
ed98df51 MC |
148 | case NID_aes_256_ofb128: |
149 | case NID_aes_192_ofb128: | |
150 | case NID_aes_128_ofb128: | |
75dd6d64 MC |
151 | case NID_aes_256_cfb128: |
152 | case NID_aes_192_cfb128: | |
153 | case NID_aes_128_cfb128: | |
154 | case NID_aes_256_cfb1: | |
155 | case NID_aes_192_cfb1: | |
156 | case NID_aes_128_cfb1: | |
157 | case NID_aes_256_cfb8: | |
158 | case NID_aes_192_cfb8: | |
159 | case NID_aes_128_cfb8: | |
aab26e6f | 160 | break; |
df05f2ce MC |
161 | default: |
162 | goto legacy; | |
163 | } | |
164 | } | |
165 | ||
166 | /* | |
167 | * Ensure a context left lying around from last time is cleared | |
168 | * (legacy code) | |
169 | */ | |
170 | if (cipher != NULL && ctx->cipher != NULL) { | |
171 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
172 | ctx->cipher_data = NULL; | |
173 | } | |
174 | ||
175 | ||
176 | /* TODO(3.0): Start of non-legacy code below */ | |
177 | ||
178 | /* Ensure a context left lying around from last time is cleared */ | |
179 | if (cipher != NULL && ctx->cipher != NULL) { | |
180 | unsigned long flags = ctx->flags; | |
181 | ||
182 | EVP_CIPHER_CTX_reset(ctx); | |
183 | /* Restore encrypt and flags */ | |
184 | ctx->encrypt = enc; | |
185 | ctx->flags = flags; | |
186 | } | |
187 | ||
188 | if (cipher != NULL) | |
189 | ctx->cipher = cipher; | |
190 | else | |
191 | cipher = ctx->cipher; | |
192 | ||
193 | if (cipher->prov == NULL) { | |
194 | provciph = EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), ""); | |
195 | if (provciph == NULL) { | |
196 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
197 | return 0; | |
198 | } | |
199 | cipher = provciph; | |
200 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
201 | ctx->fetched_cipher = provciph; | |
202 | } | |
203 | ||
204 | ctx->cipher = cipher; | |
205 | if (ctx->provctx == NULL) { | |
206 | ctx->provctx = ctx->cipher->newctx(); | |
207 | if (ctx->provctx == NULL) { | |
208 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
209 | return 0; | |
210 | } | |
211 | } | |
212 | ||
213 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 214 | /* |
df05f2ce MC |
215 | * If this ctx was already set up for no padding then we need to tell |
216 | * the new cipher about it. | |
217 | */ | |
218 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
219 | return 0; | |
220 | } | |
221 | ||
718b133a MC |
222 | switch (EVP_CIPHER_mode(ctx->cipher)) { |
223 | case EVP_CIPH_CFB_MODE: | |
224 | case EVP_CIPH_OFB_MODE: | |
225 | case EVP_CIPH_CBC_MODE: | |
226 | /* For these modes we remember the original IV for later use */ | |
227 | if (!ossl_assert(EVP_CIPHER_CTX_iv_length(ctx) <= (int)sizeof(ctx->oiv))) { | |
228 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
229 | return 0; | |
230 | } | |
231 | if (iv != NULL) | |
232 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
233 | } | |
234 | ||
df05f2ce MC |
235 | if (enc) { |
236 | if (ctx->cipher->einit == NULL) { | |
237 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
238 | return 0; | |
239 | } | |
240 | ||
241 | return ctx->cipher->einit(ctx->provctx, key, iv); | |
242 | } | |
243 | ||
244 | if (ctx->cipher->dinit == NULL) { | |
245 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | return ctx->cipher->dinit(ctx->provctx, key, iv); | |
250 | ||
251 | /* TODO(3.0): Remove legacy code below */ | |
252 | legacy: | |
253 | ||
254 | if (cipher != NULL) { | |
255 | /* | |
256 | * Ensure a context left lying around from last time is cleared (we | |
257 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
258 | * EVP_CIPHER could be used). |
259 | */ | |
260 | if (ctx->cipher) { | |
261 | unsigned long flags = ctx->flags; | |
c0ca39bd | 262 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
263 | /* Restore encrypt and flags */ |
264 | ctx->encrypt = enc; | |
265 | ctx->flags = flags; | |
266 | } | |
0b13e9f0 | 267 | #ifndef OPENSSL_NO_ENGINE |
df05f2ce | 268 | if (impl != NULL) { |
0f113f3e MC |
269 | if (!ENGINE_init(impl)) { |
270 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
271 | return 0; | |
272 | } | |
df05f2ce MC |
273 | } else { |
274 | impl = tmpimpl; | |
275 | } | |
276 | if (impl != NULL) { | |
0f113f3e MC |
277 | /* There's an ENGINE for this job ... (apparently) */ |
278 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
279 | |
280 | if (c == NULL) { | |
0f113f3e MC |
281 | /* |
282 | * One positive side-effect of US's export control history, | |
283 | * is that we should at least be able to avoid using US | |
0d4fb843 | 284 | * misspellings of "initialisation"? |
0f113f3e MC |
285 | */ |
286 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
287 | return 0; | |
288 | } | |
289 | /* We'll use the ENGINE's private cipher definition */ | |
290 | cipher = c; | |
291 | /* | |
292 | * Store the ENGINE functional reference so we know 'cipher' came | |
293 | * from an ENGINE and we need to release it when done. | |
294 | */ | |
295 | ctx->engine = impl; | |
df05f2ce | 296 | } else { |
0f113f3e | 297 | ctx->engine = NULL; |
df05f2ce | 298 | } |
0b13e9f0 | 299 | #endif |
544a2aea | 300 | |
0f113f3e MC |
301 | ctx->cipher = cipher; |
302 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 303 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 304 | if (ctx->cipher_data == NULL) { |
273a0218 | 305 | ctx->cipher = NULL; |
0f113f3e MC |
306 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); |
307 | return 0; | |
308 | } | |
309 | } else { | |
310 | ctx->cipher_data = NULL; | |
311 | } | |
312 | ctx->key_len = cipher->key_len; | |
313 | /* Preserve wrap enable flag, zero everything else */ | |
314 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
315 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
316 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 317 | ctx->cipher = NULL; |
0f113f3e MC |
318 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
319 | return 0; | |
320 | } | |
321 | } | |
0f113f3e | 322 | } |
0b13e9f0 | 323 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 324 | skip_to_init: |
0b13e9f0 | 325 | #endif |
0f113f3e MC |
326 | /* we assume block size is a power of 2 in *cryptUpdate */ |
327 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
328 | || ctx->cipher->block_size == 8 | |
329 | || ctx->cipher->block_size == 16); | |
330 | ||
331 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
332 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
333 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
334 | return 0; | |
335 | } | |
336 | ||
480d3323 | 337 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
338 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
339 | ||
340 | case EVP_CIPH_STREAM_CIPHER: | |
341 | case EVP_CIPH_ECB_MODE: | |
342 | break; | |
343 | ||
344 | case EVP_CIPH_CFB_MODE: | |
345 | case EVP_CIPH_OFB_MODE: | |
346 | ||
347 | ctx->num = 0; | |
348 | /* fall-through */ | |
349 | ||
350 | case EVP_CIPH_CBC_MODE: | |
351 | ||
352 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
353 | (int)sizeof(ctx->iv)); | |
354 | if (iv) | |
355 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
356 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
357 | break; | |
358 | ||
359 | case EVP_CIPH_CTR_MODE: | |
360 | ctx->num = 0; | |
361 | /* Don't reuse IV for CTR mode */ | |
362 | if (iv) | |
363 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
364 | break; | |
365 | ||
366 | default: | |
367 | return 0; | |
0f113f3e MC |
368 | } |
369 | } | |
370 | ||
371 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
372 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
373 | return 0; | |
374 | } | |
375 | ctx->buf_len = 0; | |
376 | ctx->final_used = 0; | |
377 | ctx->block_mask = ctx->cipher->block_size - 1; | |
378 | return 1; | |
379 | } | |
d02b48c6 | 380 | |
be06a934 | 381 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
382 | const unsigned char *in, int inl) |
383 | { | |
384 | if (ctx->encrypt) | |
385 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
386 | else | |
387 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
388 | } | |
d02b48c6 | 389 | |
581f1c84 | 390 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
391 | { |
392 | if (ctx->encrypt) | |
393 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
394 | else | |
395 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
396 | } | |
581f1c84 | 397 | |
6b691a5c | 398 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
399 | { |
400 | if (ctx->encrypt) | |
401 | return EVP_EncryptFinal(ctx, out, outl); | |
402 | else | |
403 | return EVP_DecryptFinal(ctx, out, outl); | |
404 | } | |
d02b48c6 | 405 | |
be06a934 | 406 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
407 | const unsigned char *key, const unsigned char *iv) |
408 | { | |
409 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
410 | } | |
18eda732 | 411 | |
0f113f3e MC |
412 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
413 | ENGINE *impl, const unsigned char *key, | |
414 | const unsigned char *iv) | |
415 | { | |
416 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
417 | } | |
d02b48c6 | 418 | |
be06a934 | 419 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
420 | const unsigned char *key, const unsigned char *iv) |
421 | { | |
422 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
423 | } | |
18eda732 | 424 | |
0f113f3e MC |
425 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
426 | ENGINE *impl, const unsigned char *key, | |
427 | const unsigned char *iv) | |
428 | { | |
429 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
430 | } | |
d02b48c6 | 431 | |
c3a73daf AP |
432 | /* |
433 | * According to the letter of standard difference between pointers | |
434 | * is specified to be valid only within same object. This makes | |
435 | * it formally challenging to determine if input and output buffers | |
436 | * are not partially overlapping with standard pointer arithmetic. | |
437 | */ | |
438 | #ifdef PTRDIFF_T | |
439 | # undef PTRDIFF_T | |
440 | #endif | |
441 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
442 | /* | |
443 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
444 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
445 | * difference between two pointers might be truncated to 32 bits. | |
446 | * In the context one can even wonder how comparison for | |
447 | * equality is implemented. To be on the safe side we adhere to | |
448 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
449 | */ |
450 | # define PTRDIFF_T uint64_t | |
451 | #else | |
452 | # define PTRDIFF_T size_t | |
453 | #endif | |
454 | ||
7141ba31 | 455 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
456 | { |
457 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
458 | /* | |
459 | * Check for partially overlapping buffers. [Binary logical | |
460 | * operations are used instead of boolean to minimize number | |
461 | * of conditional branches.] | |
462 | */ | |
83151b73 AP |
463 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
464 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 465 | |
83151b73 | 466 | return overlapped; |
c3a73daf AP |
467 | } |
468 | ||
a8bf2f8f RL |
469 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
470 | unsigned char *out, int *outl, | |
471 | const unsigned char *in, int inl) | |
0f113f3e | 472 | { |
64846096 LP |
473 | int i, j, bl, cmpl = inl; |
474 | ||
475 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
476 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 477 | |
7141ba31 MC |
478 | bl = ctx->cipher->block_size; |
479 | ||
dcb982d7 RL |
480 | if (inl <= 0) { |
481 | *outl = 0; | |
482 | return inl == 0; | |
483 | } | |
484 | ||
0f113f3e | 485 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 486 | /* If block size > 1 then the cipher will have to do this check */ |
64846096 | 487 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { |
a8bf2f8f | 488 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 489 | return 0; |
83151b73 | 490 | } |
5fc77684 | 491 | |
0f113f3e MC |
492 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
493 | if (i < 0) | |
494 | return 0; | |
495 | else | |
496 | *outl = i; | |
497 | return 1; | |
498 | } | |
499 | ||
64846096 | 500 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
a8bf2f8f | 501 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 502 | return 0; |
83151b73 | 503 | } |
0f113f3e MC |
504 | |
505 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
506 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
507 | *outl = inl; | |
508 | return 1; | |
509 | } else { | |
510 | *outl = 0; | |
511 | return 0; | |
512 | } | |
513 | } | |
514 | i = ctx->buf_len; | |
0f113f3e MC |
515 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
516 | if (i != 0) { | |
3f358213 | 517 | if (bl - i > inl) { |
0f113f3e MC |
518 | memcpy(&(ctx->buf[i]), in, inl); |
519 | ctx->buf_len += inl; | |
520 | *outl = 0; | |
521 | return 1; | |
522 | } else { | |
523 | j = bl - i; | |
524 | memcpy(&(ctx->buf[i]), in, j); | |
0f113f3e MC |
525 | inl -= j; |
526 | in += j; | |
5fc77684 AP |
527 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
528 | return 0; | |
0f113f3e MC |
529 | out += bl; |
530 | *outl = bl; | |
531 | } | |
532 | } else | |
533 | *outl = 0; | |
534 | i = inl & (bl - 1); | |
535 | inl -= i; | |
536 | if (inl > 0) { | |
537 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
538 | return 0; | |
539 | *outl += inl; | |
540 | } | |
541 | ||
542 | if (i != 0) | |
543 | memcpy(ctx->buf, &(in[inl]), i); | |
544 | ctx->buf_len = i; | |
545 | return 1; | |
546 | } | |
d02b48c6 | 547 | |
a8bf2f8f RL |
548 | |
549 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
550 | const unsigned char *in, int inl) | |
551 | { | |
df05f2ce MC |
552 | int ret; |
553 | size_t soutl; | |
554 | ||
a8bf2f8f RL |
555 | /* Prevent accidental use of decryption context when encrypting */ |
556 | if (!ctx->encrypt) { | |
557 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
558 | return 0; | |
559 | } | |
560 | ||
df05f2ce MC |
561 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) |
562 | goto legacy; | |
563 | ||
564 | if (ctx->cipher->cupdate == NULL) { | |
565 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
566 | return 0; | |
567 | } | |
568 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, in, (size_t)inl); | |
569 | ||
570 | if (soutl > INT_MAX) { | |
571 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
572 | return 0; | |
573 | } | |
574 | *outl = soutl; | |
575 | return ret; | |
576 | ||
577 | /* TODO(3.0): Remove legacy code below */ | |
578 | legacy: | |
579 | ||
a8bf2f8f RL |
580 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
581 | } | |
582 | ||
be06a934 | 583 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
584 | { |
585 | int ret; | |
586 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
587 | return ret; | |
588 | } | |
581f1c84 DSH |
589 | |
590 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
591 | { |
592 | int n, ret; | |
593 | unsigned int i, b, bl; | |
df05f2ce | 594 | size_t soutl; |
0f113f3e | 595 | |
a8bf2f8f RL |
596 | /* Prevent accidental use of decryption context when encrypting */ |
597 | if (!ctx->encrypt) { | |
598 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
599 | return 0; | |
600 | } | |
601 | ||
df05f2ce MC |
602 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) |
603 | goto legacy; | |
604 | ||
605 | if (ctx->cipher->cfinal == NULL) { | |
606 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
607 | return 0; | |
608 | } | |
609 | ||
610 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl); | |
611 | ||
612 | if (soutl > INT_MAX) { | |
613 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
614 | return 0; | |
615 | } | |
616 | *outl = soutl; | |
617 | ||
618 | return ret; | |
619 | ||
620 | /* TODO(3.0): Remove legacy code below */ | |
621 | legacy: | |
622 | ||
0f113f3e MC |
623 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
624 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
625 | if (ret < 0) | |
626 | return 0; | |
627 | else | |
628 | *outl = ret; | |
629 | return 1; | |
630 | } | |
631 | ||
632 | b = ctx->cipher->block_size; | |
cbe29648 | 633 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
634 | if (b == 1) { |
635 | *outl = 0; | |
636 | return 1; | |
637 | } | |
638 | bl = ctx->buf_len; | |
639 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
640 | if (bl) { | |
641 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
642 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
643 | return 0; | |
644 | } | |
645 | *outl = 0; | |
646 | return 1; | |
647 | } | |
648 | ||
649 | n = b - bl; | |
650 | for (i = bl; i < b; i++) | |
651 | ctx->buf[i] = n; | |
652 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
653 | ||
654 | if (ret) | |
655 | *outl = b; | |
656 | ||
657 | return ret; | |
658 | } | |
d02b48c6 | 659 | |
be06a934 | 660 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
661 | const unsigned char *in, int inl) |
662 | { | |
df05f2ce | 663 | int fix_len, cmpl = inl, ret; |
0f113f3e | 664 | unsigned int b; |
df05f2ce | 665 | size_t soutl; |
0f113f3e | 666 | |
a8bf2f8f RL |
667 | /* Prevent accidental use of encryption context when decrypting */ |
668 | if (ctx->encrypt) { | |
669 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
670 | return 0; | |
671 | } | |
672 | ||
df05f2ce MC |
673 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) |
674 | goto legacy; | |
675 | ||
676 | if (ctx->cipher->cupdate == NULL) { | |
677 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
678 | return 0; | |
679 | } | |
680 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, in, (size_t)inl); | |
681 | ||
682 | if (ret) { | |
683 | if (soutl > INT_MAX) { | |
684 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
685 | return 0; | |
686 | } | |
687 | *outl = soutl; | |
688 | } | |
689 | ||
690 | return ret; | |
691 | ||
692 | /* TODO(3.0): Remove legacy code below */ | |
693 | legacy: | |
694 | ||
7141ba31 MC |
695 | b = ctx->cipher->block_size; |
696 | ||
64846096 LP |
697 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
698 | cmpl = (cmpl + 7) / 8; | |
699 | ||
dcb982d7 RL |
700 | if (inl <= 0) { |
701 | *outl = 0; | |
702 | return inl == 0; | |
703 | } | |
704 | ||
0f113f3e | 705 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
64846096 | 706 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { |
83151b73 | 707 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 708 | return 0; |
83151b73 | 709 | } |
5fc77684 | 710 | |
0f113f3e MC |
711 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
712 | if (fix_len < 0) { | |
713 | *outl = 0; | |
714 | return 0; | |
715 | } else | |
716 | *outl = fix_len; | |
717 | return 1; | |
718 | } | |
719 | ||
0f113f3e | 720 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 721 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 722 | |
cbe29648 | 723 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
724 | |
725 | if (ctx->final_used) { | |
5fc77684 AP |
726 | /* see comment about PTRDIFF_T comparison above */ |
727 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
83151b73 AP |
728 | || is_partially_overlapping(out, in, b)) { |
729 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
5fc77684 | 730 | return 0; |
83151b73 | 731 | } |
0f113f3e MC |
732 | memcpy(out, ctx->final, b); |
733 | out += b; | |
734 | fix_len = 1; | |
735 | } else | |
736 | fix_len = 0; | |
737 | ||
a8bf2f8f | 738 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
739 | return 0; |
740 | ||
741 | /* | |
742 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
743 | * copy of this last block | |
744 | */ | |
745 | if (b > 1 && !ctx->buf_len) { | |
746 | *outl -= b; | |
747 | ctx->final_used = 1; | |
748 | memcpy(ctx->final, &out[*outl], b); | |
749 | } else | |
750 | ctx->final_used = 0; | |
751 | ||
752 | if (fix_len) | |
753 | *outl += b; | |
754 | ||
755 | return 1; | |
756 | } | |
d02b48c6 | 757 | |
6b691a5c | 758 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
759 | { |
760 | int ret; | |
761 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
762 | return ret; | |
763 | } | |
581f1c84 DSH |
764 | |
765 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
766 | { |
767 | int i, n; | |
768 | unsigned int b; | |
df05f2ce MC |
769 | size_t soutl; |
770 | int ret; | |
a8bf2f8f RL |
771 | |
772 | /* Prevent accidental use of encryption context when decrypting */ | |
773 | if (ctx->encrypt) { | |
774 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
775 | return 0; | |
776 | } | |
777 | ||
df05f2ce MC |
778 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) |
779 | goto legacy; | |
780 | ||
781 | if (ctx->cipher->cfinal == NULL) { | |
782 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
783 | return 0; | |
784 | } | |
785 | ||
786 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl); | |
787 | ||
788 | if (ret) { | |
789 | if (soutl > INT_MAX) { | |
790 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
791 | return 0; | |
792 | } | |
793 | *outl = soutl; | |
794 | } | |
795 | ||
796 | return ret; | |
797 | ||
798 | /* TODO(3.0): Remove legacy code below */ | |
799 | legacy: | |
800 | ||
0f113f3e MC |
801 | *outl = 0; |
802 | ||
803 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
804 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
805 | if (i < 0) | |
806 | return 0; | |
807 | else | |
808 | *outl = i; | |
809 | return 1; | |
810 | } | |
811 | ||
812 | b = ctx->cipher->block_size; | |
813 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
814 | if (ctx->buf_len) { | |
815 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
816 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
817 | return 0; | |
818 | } | |
819 | *outl = 0; | |
820 | return 1; | |
821 | } | |
822 | if (b > 1) { | |
823 | if (ctx->buf_len || !ctx->final_used) { | |
824 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
26a7d938 | 825 | return 0; |
0f113f3e | 826 | } |
cbe29648 | 827 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
828 | |
829 | /* | |
830 | * The following assumes that the ciphertext has been authenticated. | |
831 | * Otherwise it provides a padding oracle. | |
832 | */ | |
833 | n = ctx->final[b - 1]; | |
834 | if (n == 0 || n > (int)b) { | |
835 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 836 | return 0; |
0f113f3e MC |
837 | } |
838 | for (i = 0; i < n; i++) { | |
839 | if (ctx->final[--b] != n) { | |
840 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 841 | return 0; |
0f113f3e MC |
842 | } |
843 | } | |
844 | n = ctx->cipher->block_size - n; | |
845 | for (i = 0; i < n; i++) | |
846 | out[i] = ctx->final[i]; | |
847 | *outl = n; | |
848 | } else | |
849 | *outl = 0; | |
208fb891 | 850 | return 1; |
0f113f3e | 851 | } |
d02b48c6 | 852 | |
6343829a | 853 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e MC |
854 | { |
855 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) | |
856 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 857 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
858 | return 1; |
859 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
860 | c->key_len = keylen; | |
861 | return 1; | |
862 | } | |
863 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
864 | return 0; | |
865 | } | |
49528751 | 866 | |
f2e5ca84 | 867 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e MC |
868 | { |
869 | if (pad) | |
870 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
871 | else | |
872 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce MC |
873 | |
874 | if (ctx->cipher != NULL && ctx->cipher->prov != NULL) { | |
875 | OSSL_PARAM params[] = { | |
876 | OSSL_PARAM_int(OSSL_CIPHER_PARAM_PADDING, NULL), | |
877 | OSSL_PARAM_END | |
878 | }; | |
879 | ||
880 | params[0].data = &pad; | |
881 | ||
718b133a | 882 | if (ctx->cipher->ctx_set_params == NULL) { |
df05f2ce MC |
883 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_PADDING, EVP_R_CTRL_NOT_IMPLEMENTED); |
884 | return 0; | |
885 | } | |
886 | ||
718b133a | 887 | if (!ctx->cipher->ctx_set_params(ctx->provctx, params)) |
df05f2ce MC |
888 | return 0; |
889 | } | |
890 | ||
0f113f3e MC |
891 | return 1; |
892 | } | |
f2e5ca84 | 893 | |
49528751 DSH |
894 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
895 | { | |
0f113f3e | 896 | int ret; |
d91f4568 | 897 | |
0f113f3e MC |
898 | if (!ctx->cipher) { |
899 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); | |
900 | return 0; | |
901 | } | |
902 | ||
903 | if (!ctx->cipher->ctrl) { | |
904 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); | |
905 | return 0; | |
906 | } | |
907 | ||
908 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
909 | if (ret == -1) { | |
910 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, | |
911 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
912 | return 0; | |
913 | } | |
914 | return ret; | |
49528751 | 915 | } |
216659eb DSH |
916 | |
917 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) | |
0f113f3e MC |
918 | { |
919 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
920 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4cffafe9 | 921 | if (RAND_priv_bytes(key, ctx->key_len) <= 0) |
0f113f3e MC |
922 | return 0; |
923 | return 1; | |
924 | } | |
216659eb | 925 | |
c2bf7208 | 926 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
927 | { |
928 | if ((in == NULL) || (in->cipher == NULL)) { | |
929 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
930 | return 0; | |
931 | } | |
df05f2ce MC |
932 | |
933 | if (in->cipher->prov == NULL) | |
934 | goto legacy; | |
935 | ||
936 | if (in->cipher->dupctx == NULL) { | |
937 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
938 | return 0; | |
939 | } | |
940 | ||
941 | EVP_CIPHER_CTX_reset(out); | |
942 | ||
943 | *out = *in; | |
944 | out->provctx = NULL; | |
945 | ||
718b133a | 946 | if (in->fetched_cipher != NULL && !EVP_CIPHER_upref(in->fetched_cipher)) { |
df05f2ce MC |
947 | out->fetched_cipher = NULL; |
948 | return 0; | |
949 | } | |
950 | ||
951 | out->provctx = in->cipher->dupctx(in->provctx); | |
952 | if (out->provctx == NULL) { | |
953 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
954 | return 0; | |
955 | } | |
956 | ||
957 | return 1; | |
958 | ||
959 | /* TODO(3.0): Remove legacy code below */ | |
960 | legacy: | |
961 | ||
c2bf7208 | 962 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
963 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
964 | if (in->engine && !ENGINE_init(in->engine)) { | |
965 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
966 | return 0; | |
967 | } | |
c2bf7208 DSH |
968 | #endif |
969 | ||
c0ca39bd | 970 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 971 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
972 | |
973 | if (in->cipher_data && in->cipher->ctx_size) { | |
974 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 975 | if (out->cipher_data == NULL) { |
273a0218 | 976 | out->cipher = NULL; |
0f113f3e MC |
977 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); |
978 | return 0; | |
979 | } | |
980 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
981 | } | |
982 | ||
983 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
984 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
985 | out->cipher = NULL; | |
986 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
987 | return 0; | |
988 | } | |
0f113f3e MC |
989 | return 1; |
990 | } | |
df05f2ce MC |
991 | |
992 | static void *evp_cipher_from_dispatch(int nid, const OSSL_DISPATCH *fns, | |
993 | OSSL_PROVIDER *prov) | |
994 | { | |
995 | EVP_CIPHER *cipher = NULL; | |
996 | int fnciphcnt = 0, fnctxcnt = 0; | |
997 | ||
998 | if ((cipher = EVP_CIPHER_meth_new(nid, 0, 0)) == NULL) | |
999 | return NULL; | |
1000 | ||
1001 | for (; fns->function_id != 0; fns++) { | |
1002 | switch (fns->function_id) { | |
1003 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1004 | if (cipher->newctx != NULL) | |
1005 | break; | |
1006 | cipher->newctx = OSSL_get_OP_cipher_newctx(fns); | |
1007 | fnctxcnt++; | |
1008 | break; | |
1009 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1010 | if (cipher->einit != NULL) | |
1011 | break; | |
1012 | cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns); | |
1013 | fnciphcnt++; | |
1014 | break; | |
1015 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1016 | if (cipher->dinit != NULL) | |
1017 | break; | |
1018 | cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns); | |
1019 | fnciphcnt++; | |
1020 | break; | |
1021 | case OSSL_FUNC_CIPHER_UPDATE: | |
1022 | if (cipher->cupdate != NULL) | |
1023 | break; | |
1024 | cipher->cupdate = OSSL_get_OP_cipher_update(fns); | |
1025 | fnciphcnt++; | |
1026 | break; | |
1027 | case OSSL_FUNC_CIPHER_FINAL: | |
1028 | if (cipher->cfinal != NULL) | |
1029 | break; | |
1030 | cipher->cfinal = OSSL_get_OP_cipher_final(fns); | |
1031 | fnciphcnt++; | |
1032 | break; | |
718b133a MC |
1033 | case OSSL_FUNC_CIPHER_CIPHER: |
1034 | if (cipher->ccipher != NULL) | |
1035 | break; | |
1036 | cipher->ccipher = OSSL_get_OP_cipher_cipher(fns); | |
1037 | break; | |
df05f2ce MC |
1038 | case OSSL_FUNC_CIPHER_FREECTX: |
1039 | if (cipher->freectx != NULL) | |
1040 | break; | |
1041 | cipher->freectx = OSSL_get_OP_cipher_freectx(fns); | |
1042 | fnctxcnt++; | |
1043 | break; | |
1044 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1045 | if (cipher->dupctx != NULL) | |
1046 | break; | |
1047 | cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns); | |
1048 | break; | |
1049 | case OSSL_FUNC_CIPHER_KEY_LENGTH: | |
1050 | if (cipher->key_length != NULL) | |
1051 | break; | |
1052 | cipher->key_length = OSSL_get_OP_cipher_key_length(fns); | |
1053 | break; | |
718b133a MC |
1054 | case OSSL_FUNC_CIPHER_IV_LENGTH: |
1055 | if (cipher->iv_length != NULL) | |
1056 | break; | |
1057 | cipher->iv_length = OSSL_get_OP_cipher_iv_length(fns); | |
1058 | break; | |
1059 | case OSSL_FUNC_CIPHER_BLOCK_SIZE: | |
1060 | if (cipher->blocksize != NULL) | |
1061 | break; | |
1062 | cipher->blocksize = OSSL_get_OP_cipher_block_size(fns); | |
1063 | break; | |
df05f2ce MC |
1064 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1065 | if (cipher->get_params != NULL) | |
1066 | break; | |
1067 | cipher->get_params = OSSL_get_OP_cipher_get_params(fns); | |
1068 | break; | |
718b133a MC |
1069 | case OSSL_FUNC_CIPHER_CTX_GET_PARAMS: |
1070 | if (cipher->ctx_get_params != NULL) | |
1071 | break; | |
1072 | cipher->ctx_get_params = OSSL_get_OP_cipher_ctx_get_params(fns); | |
1073 | break; | |
1074 | case OSSL_FUNC_CIPHER_CTX_SET_PARAMS: | |
1075 | if (cipher->ctx_set_params != NULL) | |
df05f2ce | 1076 | break; |
718b133a | 1077 | cipher->ctx_set_params = OSSL_get_OP_cipher_ctx_set_params(fns); |
df05f2ce MC |
1078 | break; |
1079 | } | |
1080 | } | |
718b133a MC |
1081 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1082 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
df05f2ce MC |
1083 | || fnctxcnt != 2) { |
1084 | /* | |
1085 | * In order to be a consistent set of functions we must have at least | |
1086 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
718b133a MC |
1087 | * functions, or a single "cipher" function. In all cases we need a |
1088 | * complete set of context management functions | |
df05f2ce MC |
1089 | */ |
1090 | EVP_CIPHER_meth_free(cipher); | |
1091 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); | |
1092 | return NULL; | |
1093 | } | |
1094 | cipher->prov = prov; | |
1095 | if (prov != NULL) | |
1096 | ossl_provider_upref(prov); | |
1097 | ||
1098 | return cipher; | |
1099 | } | |
1100 | ||
1101 | static int evp_cipher_upref(void *cipher) | |
1102 | { | |
1103 | return EVP_CIPHER_upref(cipher); | |
1104 | } | |
1105 | ||
1106 | static void evp_cipher_free(void *cipher) | |
1107 | { | |
1108 | EVP_CIPHER_meth_free(cipher); | |
1109 | } | |
1110 | ||
1111 | static int evp_cipher_nid(void *vcipher) | |
1112 | { | |
1113 | EVP_CIPHER *cipher = vcipher; | |
1114 | ||
1115 | return cipher->nid; | |
1116 | } | |
1117 | ||
1118 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, | |
1119 | const char *properties) | |
1120 | { | |
1121 | return evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
1122 | evp_cipher_from_dispatch, evp_cipher_upref, | |
1123 | evp_cipher_free, evp_cipher_nid); | |
1124 | } |