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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: | |
819a7ae9 MC |
160 | case NID_aes_256_ctr: |
161 | case NID_aes_192_ctr: | |
162 | case NID_aes_128_ctr: | |
aab26e6f | 163 | break; |
df05f2ce MC |
164 | default: |
165 | goto legacy; | |
166 | } | |
167 | } | |
168 | ||
169 | /* | |
170 | * Ensure a context left lying around from last time is cleared | |
171 | * (legacy code) | |
172 | */ | |
173 | if (cipher != NULL && ctx->cipher != NULL) { | |
174 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
175 | ctx->cipher_data = NULL; | |
176 | } | |
177 | ||
178 | ||
179 | /* TODO(3.0): Start of non-legacy code below */ | |
180 | ||
181 | /* Ensure a context left lying around from last time is cleared */ | |
182 | if (cipher != NULL && ctx->cipher != NULL) { | |
183 | unsigned long flags = ctx->flags; | |
184 | ||
185 | EVP_CIPHER_CTX_reset(ctx); | |
186 | /* Restore encrypt and flags */ | |
187 | ctx->encrypt = enc; | |
188 | ctx->flags = flags; | |
189 | } | |
190 | ||
191 | if (cipher != NULL) | |
192 | ctx->cipher = cipher; | |
193 | else | |
194 | cipher = ctx->cipher; | |
195 | ||
196 | if (cipher->prov == NULL) { | |
197 | provciph = EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), ""); | |
198 | if (provciph == NULL) { | |
199 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
200 | return 0; | |
201 | } | |
202 | cipher = provciph; | |
203 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
204 | ctx->fetched_cipher = provciph; | |
205 | } | |
206 | ||
207 | ctx->cipher = cipher; | |
208 | if (ctx->provctx == NULL) { | |
a39eb840 | 209 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
df05f2ce MC |
210 | if (ctx->provctx == NULL) { |
211 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
212 | return 0; | |
213 | } | |
214 | } | |
215 | ||
216 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 217 | /* |
df05f2ce MC |
218 | * If this ctx was already set up for no padding then we need to tell |
219 | * the new cipher about it. | |
220 | */ | |
221 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
222 | return 0; | |
223 | } | |
224 | ||
718b133a MC |
225 | switch (EVP_CIPHER_mode(ctx->cipher)) { |
226 | case EVP_CIPH_CFB_MODE: | |
227 | case EVP_CIPH_OFB_MODE: | |
228 | case EVP_CIPH_CBC_MODE: | |
229 | /* For these modes we remember the original IV for later use */ | |
230 | if (!ossl_assert(EVP_CIPHER_CTX_iv_length(ctx) <= (int)sizeof(ctx->oiv))) { | |
231 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
232 | return 0; | |
233 | } | |
234 | if (iv != NULL) | |
235 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
236 | } | |
237 | ||
df05f2ce MC |
238 | if (enc) { |
239 | if (ctx->cipher->einit == NULL) { | |
240 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
241 | return 0; | |
242 | } | |
243 | ||
344cfa34 MC |
244 | return ctx->cipher->einit(ctx->provctx, |
245 | key, | |
33b40a10 MC |
246 | key == NULL ? 0 |
247 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 248 | iv, |
33b40a10 MC |
249 | iv == NULL ? 0 |
250 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
251 | } |
252 | ||
253 | if (ctx->cipher->dinit == NULL) { | |
254 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
255 | return 0; | |
256 | } | |
257 | ||
344cfa34 MC |
258 | return ctx->cipher->dinit(ctx->provctx, |
259 | key, | |
33b40a10 MC |
260 | key == NULL ? 0 |
261 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 262 | iv, |
33b40a10 MC |
263 | iv == NULL ? 0 |
264 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
265 | |
266 | /* TODO(3.0): Remove legacy code below */ | |
267 | legacy: | |
268 | ||
269 | if (cipher != NULL) { | |
270 | /* | |
271 | * Ensure a context left lying around from last time is cleared (we | |
272 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
273 | * EVP_CIPHER could be used). |
274 | */ | |
275 | if (ctx->cipher) { | |
276 | unsigned long flags = ctx->flags; | |
c0ca39bd | 277 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
278 | /* Restore encrypt and flags */ |
279 | ctx->encrypt = enc; | |
280 | ctx->flags = flags; | |
281 | } | |
0b13e9f0 | 282 | #ifndef OPENSSL_NO_ENGINE |
df05f2ce | 283 | if (impl != NULL) { |
0f113f3e MC |
284 | if (!ENGINE_init(impl)) { |
285 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
286 | return 0; | |
287 | } | |
df05f2ce MC |
288 | } else { |
289 | impl = tmpimpl; | |
290 | } | |
291 | if (impl != NULL) { | |
0f113f3e MC |
292 | /* There's an ENGINE for this job ... (apparently) */ |
293 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
294 | |
295 | if (c == NULL) { | |
0f113f3e MC |
296 | /* |
297 | * One positive side-effect of US's export control history, | |
298 | * is that we should at least be able to avoid using US | |
0d4fb843 | 299 | * misspellings of "initialisation"? |
0f113f3e MC |
300 | */ |
301 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
302 | return 0; | |
303 | } | |
304 | /* We'll use the ENGINE's private cipher definition */ | |
305 | cipher = c; | |
306 | /* | |
307 | * Store the ENGINE functional reference so we know 'cipher' came | |
308 | * from an ENGINE and we need to release it when done. | |
309 | */ | |
310 | ctx->engine = impl; | |
df05f2ce | 311 | } else { |
0f113f3e | 312 | ctx->engine = NULL; |
df05f2ce | 313 | } |
0b13e9f0 | 314 | #endif |
544a2aea | 315 | |
0f113f3e MC |
316 | ctx->cipher = cipher; |
317 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 318 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 319 | if (ctx->cipher_data == NULL) { |
273a0218 | 320 | ctx->cipher = NULL; |
0f113f3e MC |
321 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); |
322 | return 0; | |
323 | } | |
324 | } else { | |
325 | ctx->cipher_data = NULL; | |
326 | } | |
327 | ctx->key_len = cipher->key_len; | |
328 | /* Preserve wrap enable flag, zero everything else */ | |
329 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
330 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
331 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 332 | ctx->cipher = NULL; |
0f113f3e MC |
333 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
334 | return 0; | |
335 | } | |
336 | } | |
0f113f3e | 337 | } |
0b13e9f0 | 338 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 339 | skip_to_init: |
0b13e9f0 | 340 | #endif |
1702c500 P |
341 | if (ctx->cipher == NULL) |
342 | return 0; | |
343 | ||
0f113f3e MC |
344 | /* we assume block size is a power of 2 in *cryptUpdate */ |
345 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
346 | || ctx->cipher->block_size == 8 | |
347 | || ctx->cipher->block_size == 16); | |
348 | ||
349 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
350 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
351 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
352 | return 0; | |
353 | } | |
354 | ||
480d3323 | 355 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
356 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
357 | ||
358 | case EVP_CIPH_STREAM_CIPHER: | |
359 | case EVP_CIPH_ECB_MODE: | |
360 | break; | |
361 | ||
362 | case EVP_CIPH_CFB_MODE: | |
363 | case EVP_CIPH_OFB_MODE: | |
364 | ||
365 | ctx->num = 0; | |
366 | /* fall-through */ | |
367 | ||
368 | case EVP_CIPH_CBC_MODE: | |
369 | ||
370 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
371 | (int)sizeof(ctx->iv)); | |
372 | if (iv) | |
373 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
374 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
375 | break; | |
376 | ||
377 | case EVP_CIPH_CTR_MODE: | |
378 | ctx->num = 0; | |
379 | /* Don't reuse IV for CTR mode */ | |
380 | if (iv) | |
381 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
382 | break; | |
383 | ||
384 | default: | |
385 | return 0; | |
0f113f3e MC |
386 | } |
387 | } | |
388 | ||
389 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
390 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
391 | return 0; | |
392 | } | |
393 | ctx->buf_len = 0; | |
394 | ctx->final_used = 0; | |
395 | ctx->block_mask = ctx->cipher->block_size - 1; | |
396 | return 1; | |
397 | } | |
d02b48c6 | 398 | |
be06a934 | 399 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
400 | const unsigned char *in, int inl) |
401 | { | |
402 | if (ctx->encrypt) | |
403 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
404 | else | |
405 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
406 | } | |
d02b48c6 | 407 | |
581f1c84 | 408 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
409 | { |
410 | if (ctx->encrypt) | |
411 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
412 | else | |
413 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
414 | } | |
581f1c84 | 415 | |
6b691a5c | 416 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
417 | { |
418 | if (ctx->encrypt) | |
419 | return EVP_EncryptFinal(ctx, out, outl); | |
420 | else | |
421 | return EVP_DecryptFinal(ctx, out, outl); | |
422 | } | |
d02b48c6 | 423 | |
be06a934 | 424 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
425 | const unsigned char *key, const unsigned char *iv) |
426 | { | |
427 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
428 | } | |
18eda732 | 429 | |
0f113f3e MC |
430 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
431 | ENGINE *impl, const unsigned char *key, | |
432 | const unsigned char *iv) | |
433 | { | |
434 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
435 | } | |
d02b48c6 | 436 | |
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 | |
c3a73daf AP |
450 | /* |
451 | * According to the letter of standard difference between pointers | |
452 | * is specified to be valid only within same object. This makes | |
453 | * it formally challenging to determine if input and output buffers | |
454 | * are not partially overlapping with standard pointer arithmetic. | |
455 | */ | |
456 | #ifdef PTRDIFF_T | |
457 | # undef PTRDIFF_T | |
458 | #endif | |
459 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
460 | /* | |
461 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
462 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
463 | * difference between two pointers might be truncated to 32 bits. | |
464 | * In the context one can even wonder how comparison for | |
465 | * equality is implemented. To be on the safe side we adhere to | |
466 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
467 | */ |
468 | # define PTRDIFF_T uint64_t | |
469 | #else | |
470 | # define PTRDIFF_T size_t | |
471 | #endif | |
472 | ||
7141ba31 | 473 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
474 | { |
475 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
476 | /* | |
477 | * Check for partially overlapping buffers. [Binary logical | |
478 | * operations are used instead of boolean to minimize number | |
479 | * of conditional branches.] | |
480 | */ | |
83151b73 AP |
481 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
482 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 483 | |
83151b73 | 484 | return overlapped; |
c3a73daf AP |
485 | } |
486 | ||
a8bf2f8f RL |
487 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
488 | unsigned char *out, int *outl, | |
489 | const unsigned char *in, int inl) | |
0f113f3e | 490 | { |
64846096 LP |
491 | int i, j, bl, cmpl = inl; |
492 | ||
493 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
494 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 495 | |
7141ba31 MC |
496 | bl = ctx->cipher->block_size; |
497 | ||
dcb982d7 RL |
498 | if (inl <= 0) { |
499 | *outl = 0; | |
500 | return inl == 0; | |
501 | } | |
502 | ||
0f113f3e | 503 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 504 | /* If block size > 1 then the cipher will have to do this check */ |
64846096 | 505 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { |
a8bf2f8f | 506 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 507 | return 0; |
83151b73 | 508 | } |
5fc77684 | 509 | |
0f113f3e MC |
510 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
511 | if (i < 0) | |
512 | return 0; | |
513 | else | |
514 | *outl = i; | |
515 | return 1; | |
516 | } | |
517 | ||
64846096 | 518 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
a8bf2f8f | 519 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 520 | return 0; |
83151b73 | 521 | } |
0f113f3e MC |
522 | |
523 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
524 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
525 | *outl = inl; | |
526 | return 1; | |
527 | } else { | |
528 | *outl = 0; | |
529 | return 0; | |
530 | } | |
531 | } | |
532 | i = ctx->buf_len; | |
0f113f3e MC |
533 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
534 | if (i != 0) { | |
3f358213 | 535 | if (bl - i > inl) { |
0f113f3e MC |
536 | memcpy(&(ctx->buf[i]), in, inl); |
537 | ctx->buf_len += inl; | |
538 | *outl = 0; | |
539 | return 1; | |
540 | } else { | |
541 | j = bl - i; | |
542 | memcpy(&(ctx->buf[i]), in, j); | |
0f113f3e MC |
543 | inl -= j; |
544 | in += j; | |
5fc77684 AP |
545 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
546 | return 0; | |
0f113f3e MC |
547 | out += bl; |
548 | *outl = bl; | |
549 | } | |
550 | } else | |
551 | *outl = 0; | |
552 | i = inl & (bl - 1); | |
553 | inl -= i; | |
554 | if (inl > 0) { | |
555 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
556 | return 0; | |
557 | *outl += inl; | |
558 | } | |
559 | ||
560 | if (i != 0) | |
561 | memcpy(ctx->buf, &(in[inl]), i); | |
562 | ctx->buf_len = i; | |
563 | return 1; | |
564 | } | |
d02b48c6 | 565 | |
a8bf2f8f RL |
566 | |
567 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
568 | const unsigned char *in, int inl) | |
569 | { | |
df05f2ce MC |
570 | int ret; |
571 | size_t soutl; | |
3b94944c | 572 | int blocksize; |
df05f2ce | 573 | |
a8bf2f8f RL |
574 | /* Prevent accidental use of decryption context when encrypting */ |
575 | if (!ctx->encrypt) { | |
576 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
577 | return 0; | |
578 | } | |
579 | ||
df05f2ce MC |
580 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) |
581 | goto legacy; | |
582 | ||
3b94944c MC |
583 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
584 | ||
585 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
586 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); |
587 | return 0; | |
588 | } | |
3b94944c MC |
589 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
590 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
591 | (size_t)inl); | |
df05f2ce MC |
592 | |
593 | if (soutl > INT_MAX) { | |
594 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
595 | return 0; | |
596 | } | |
597 | *outl = soutl; | |
598 | return ret; | |
599 | ||
600 | /* TODO(3.0): Remove legacy code below */ | |
601 | legacy: | |
602 | ||
a8bf2f8f RL |
603 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
604 | } | |
605 | ||
be06a934 | 606 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
607 | { |
608 | int ret; | |
609 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
610 | return ret; | |
611 | } | |
581f1c84 DSH |
612 | |
613 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
614 | { |
615 | int n, ret; | |
616 | unsigned int i, b, bl; | |
df05f2ce | 617 | size_t soutl; |
3b94944c | 618 | int blocksize; |
0f113f3e | 619 | |
a8bf2f8f RL |
620 | /* Prevent accidental use of decryption context when encrypting */ |
621 | if (!ctx->encrypt) { | |
622 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
623 | return 0; | |
624 | } | |
625 | ||
4894dcad P |
626 | if (ctx->cipher == NULL) { |
627 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
628 | return 0; | |
629 | } | |
630 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
631 | goto legacy; |
632 | ||
3b94944c MC |
633 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
634 | ||
635 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
636 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
637 | return 0; | |
638 | } | |
639 | ||
3b94944c MC |
640 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
641 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
642 | |
643 | if (soutl > INT_MAX) { | |
644 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
645 | return 0; | |
646 | } | |
647 | *outl = soutl; | |
648 | ||
649 | return ret; | |
650 | ||
651 | /* TODO(3.0): Remove legacy code below */ | |
652 | legacy: | |
653 | ||
0f113f3e MC |
654 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
655 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
656 | if (ret < 0) | |
657 | return 0; | |
658 | else | |
659 | *outl = ret; | |
660 | return 1; | |
661 | } | |
662 | ||
663 | b = ctx->cipher->block_size; | |
cbe29648 | 664 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
665 | if (b == 1) { |
666 | *outl = 0; | |
667 | return 1; | |
668 | } | |
669 | bl = ctx->buf_len; | |
670 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
671 | if (bl) { | |
672 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
673 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
674 | return 0; | |
675 | } | |
676 | *outl = 0; | |
677 | return 1; | |
678 | } | |
679 | ||
680 | n = b - bl; | |
681 | for (i = bl; i < b; i++) | |
682 | ctx->buf[i] = n; | |
683 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
684 | ||
685 | if (ret) | |
686 | *outl = b; | |
687 | ||
688 | return ret; | |
689 | } | |
d02b48c6 | 690 | |
be06a934 | 691 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
692 | const unsigned char *in, int inl) |
693 | { | |
df05f2ce | 694 | int fix_len, cmpl = inl, ret; |
0f113f3e | 695 | unsigned int b; |
df05f2ce | 696 | size_t soutl; |
3b94944c | 697 | int blocksize; |
0f113f3e | 698 | |
a8bf2f8f RL |
699 | /* Prevent accidental use of encryption context when decrypting */ |
700 | if (ctx->encrypt) { | |
701 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
702 | return 0; | |
703 | } | |
704 | ||
d2c2e49e P |
705 | if (ctx->cipher == NULL) { |
706 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
707 | return 0; | |
708 | } | |
709 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
710 | goto legacy; |
711 | ||
3b94944c MC |
712 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
713 | ||
714 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
715 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); |
716 | return 0; | |
717 | } | |
3b94944c MC |
718 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
719 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
720 | (size_t)inl); | |
df05f2ce MC |
721 | |
722 | if (ret) { | |
723 | if (soutl > INT_MAX) { | |
724 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
725 | return 0; | |
726 | } | |
727 | *outl = soutl; | |
728 | } | |
729 | ||
730 | return ret; | |
731 | ||
732 | /* TODO(3.0): Remove legacy code below */ | |
733 | legacy: | |
734 | ||
7141ba31 MC |
735 | b = ctx->cipher->block_size; |
736 | ||
64846096 LP |
737 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
738 | cmpl = (cmpl + 7) / 8; | |
739 | ||
dcb982d7 RL |
740 | if (inl <= 0) { |
741 | *outl = 0; | |
742 | return inl == 0; | |
743 | } | |
744 | ||
0f113f3e | 745 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
64846096 | 746 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { |
83151b73 | 747 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 748 | return 0; |
83151b73 | 749 | } |
5fc77684 | 750 | |
0f113f3e MC |
751 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
752 | if (fix_len < 0) { | |
753 | *outl = 0; | |
754 | return 0; | |
755 | } else | |
756 | *outl = fix_len; | |
757 | return 1; | |
758 | } | |
759 | ||
0f113f3e | 760 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 761 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 762 | |
cbe29648 | 763 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
764 | |
765 | if (ctx->final_used) { | |
5fc77684 AP |
766 | /* see comment about PTRDIFF_T comparison above */ |
767 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
83151b73 AP |
768 | || is_partially_overlapping(out, in, b)) { |
769 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
5fc77684 | 770 | return 0; |
83151b73 | 771 | } |
0f113f3e MC |
772 | memcpy(out, ctx->final, b); |
773 | out += b; | |
774 | fix_len = 1; | |
775 | } else | |
776 | fix_len = 0; | |
777 | ||
a8bf2f8f | 778 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
779 | return 0; |
780 | ||
781 | /* | |
782 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
783 | * copy of this last block | |
784 | */ | |
785 | if (b > 1 && !ctx->buf_len) { | |
786 | *outl -= b; | |
787 | ctx->final_used = 1; | |
788 | memcpy(ctx->final, &out[*outl], b); | |
789 | } else | |
790 | ctx->final_used = 0; | |
791 | ||
792 | if (fix_len) | |
793 | *outl += b; | |
794 | ||
795 | return 1; | |
796 | } | |
d02b48c6 | 797 | |
6b691a5c | 798 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
799 | { |
800 | int ret; | |
801 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
802 | return ret; | |
803 | } | |
581f1c84 DSH |
804 | |
805 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
806 | { |
807 | int i, n; | |
808 | unsigned int b; | |
df05f2ce MC |
809 | size_t soutl; |
810 | int ret; | |
3b94944c | 811 | int blocksize; |
a8bf2f8f RL |
812 | |
813 | /* Prevent accidental use of encryption context when decrypting */ | |
814 | if (ctx->encrypt) { | |
815 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
816 | return 0; | |
817 | } | |
818 | ||
df05f2ce MC |
819 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) |
820 | goto legacy; | |
821 | ||
3b94944c MC |
822 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
823 | ||
824 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
825 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
826 | return 0; | |
827 | } | |
828 | ||
3b94944c MC |
829 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
830 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
831 | |
832 | if (ret) { | |
833 | if (soutl > INT_MAX) { | |
834 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
835 | return 0; | |
836 | } | |
837 | *outl = soutl; | |
838 | } | |
839 | ||
840 | return ret; | |
841 | ||
842 | /* TODO(3.0): Remove legacy code below */ | |
843 | legacy: | |
844 | ||
0f113f3e | 845 | *outl = 0; |
ff6c7cc6 P |
846 | if (ctx->cipher == NULL) { |
847 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
848 | return 0; | |
849 | } | |
0f113f3e MC |
850 | |
851 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { | |
852 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
853 | if (i < 0) | |
854 | return 0; | |
855 | else | |
856 | *outl = i; | |
857 | return 1; | |
858 | } | |
859 | ||
860 | b = ctx->cipher->block_size; | |
861 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
862 | if (ctx->buf_len) { | |
863 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
864 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
865 | return 0; | |
866 | } | |
867 | *outl = 0; | |
868 | return 1; | |
869 | } | |
870 | if (b > 1) { | |
871 | if (ctx->buf_len || !ctx->final_used) { | |
872 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
26a7d938 | 873 | return 0; |
0f113f3e | 874 | } |
cbe29648 | 875 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
876 | |
877 | /* | |
878 | * The following assumes that the ciphertext has been authenticated. | |
879 | * Otherwise it provides a padding oracle. | |
880 | */ | |
881 | n = ctx->final[b - 1]; | |
882 | if (n == 0 || n > (int)b) { | |
883 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 884 | return 0; |
0f113f3e MC |
885 | } |
886 | for (i = 0; i < n; i++) { | |
887 | if (ctx->final[--b] != n) { | |
888 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 889 | return 0; |
0f113f3e MC |
890 | } |
891 | } | |
892 | n = ctx->cipher->block_size - n; | |
893 | for (i = 0; i < n; i++) | |
894 | out[i] = ctx->final[i]; | |
895 | *outl = n; | |
896 | } else | |
897 | *outl = 0; | |
208fb891 | 898 | return 1; |
0f113f3e | 899 | } |
d02b48c6 | 900 | |
6343829a | 901 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e MC |
902 | { |
903 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) | |
904 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 905 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
906 | return 1; |
907 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
908 | c->key_len = keylen; | |
909 | return 1; | |
910 | } | |
911 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
912 | return 0; | |
913 | } | |
49528751 | 914 | |
f2e5ca84 | 915 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e MC |
916 | { |
917 | if (pad) | |
918 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
919 | else | |
920 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce MC |
921 | |
922 | if (ctx->cipher != NULL && ctx->cipher->prov != NULL) { | |
923 | OSSL_PARAM params[] = { | |
924 | OSSL_PARAM_int(OSSL_CIPHER_PARAM_PADDING, NULL), | |
925 | OSSL_PARAM_END | |
926 | }; | |
927 | ||
928 | params[0].data = &pad; | |
929 | ||
718b133a | 930 | if (ctx->cipher->ctx_set_params == NULL) { |
df05f2ce MC |
931 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_PADDING, EVP_R_CTRL_NOT_IMPLEMENTED); |
932 | return 0; | |
933 | } | |
934 | ||
718b133a | 935 | if (!ctx->cipher->ctx_set_params(ctx->provctx, params)) |
df05f2ce MC |
936 | return 0; |
937 | } | |
938 | ||
0f113f3e MC |
939 | return 1; |
940 | } | |
f2e5ca84 | 941 | |
49528751 DSH |
942 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
943 | { | |
0f113f3e | 944 | int ret; |
d91f4568 | 945 | |
0f113f3e MC |
946 | if (!ctx->cipher) { |
947 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); | |
948 | return 0; | |
949 | } | |
950 | ||
951 | if (!ctx->cipher->ctrl) { | |
952 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); | |
953 | return 0; | |
954 | } | |
955 | ||
956 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
957 | if (ret == -1) { | |
958 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, | |
959 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
960 | return 0; | |
961 | } | |
962 | return ret; | |
49528751 | 963 | } |
216659eb DSH |
964 | |
965 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) | |
0f113f3e | 966 | { |
d0510566 | 967 | int kl; |
0f113f3e MC |
968 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) |
969 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
d0510566 P |
970 | kl = EVP_CIPHER_CTX_key_length(ctx); |
971 | if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0) | |
0f113f3e MC |
972 | return 0; |
973 | return 1; | |
974 | } | |
216659eb | 975 | |
c2bf7208 | 976 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
977 | { |
978 | if ((in == NULL) || (in->cipher == NULL)) { | |
979 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
980 | return 0; | |
981 | } | |
df05f2ce MC |
982 | |
983 | if (in->cipher->prov == NULL) | |
984 | goto legacy; | |
985 | ||
986 | if (in->cipher->dupctx == NULL) { | |
987 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
988 | return 0; | |
989 | } | |
990 | ||
991 | EVP_CIPHER_CTX_reset(out); | |
992 | ||
993 | *out = *in; | |
994 | out->provctx = NULL; | |
995 | ||
718b133a | 996 | if (in->fetched_cipher != NULL && !EVP_CIPHER_upref(in->fetched_cipher)) { |
df05f2ce MC |
997 | out->fetched_cipher = NULL; |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | out->provctx = in->cipher->dupctx(in->provctx); | |
1002 | if (out->provctx == NULL) { | |
1003 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | return 1; | |
1008 | ||
1009 | /* TODO(3.0): Remove legacy code below */ | |
1010 | legacy: | |
1011 | ||
c2bf7208 | 1012 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
1013 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1014 | if (in->engine && !ENGINE_init(in->engine)) { | |
1015 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
1016 | return 0; | |
1017 | } | |
c2bf7208 DSH |
1018 | #endif |
1019 | ||
c0ca39bd | 1020 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1021 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1022 | |
1023 | if (in->cipher_data && in->cipher->ctx_size) { | |
1024 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1025 | if (out->cipher_data == NULL) { |
273a0218 | 1026 | out->cipher = NULL; |
0f113f3e MC |
1027 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); |
1028 | return 0; | |
1029 | } | |
1030 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1031 | } | |
1032 | ||
1033 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1034 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1035 | out->cipher = NULL; | |
1036 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
1037 | return 0; | |
1038 | } | |
0f113f3e MC |
1039 | return 1; |
1040 | } | |
df05f2ce MC |
1041 | |
1042 | static void *evp_cipher_from_dispatch(int nid, const OSSL_DISPATCH *fns, | |
1043 | OSSL_PROVIDER *prov) | |
1044 | { | |
1045 | EVP_CIPHER *cipher = NULL; | |
1046 | int fnciphcnt = 0, fnctxcnt = 0; | |
1047 | ||
1048 | if ((cipher = EVP_CIPHER_meth_new(nid, 0, 0)) == NULL) | |
1049 | return NULL; | |
1050 | ||
1051 | for (; fns->function_id != 0; fns++) { | |
1052 | switch (fns->function_id) { | |
1053 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1054 | if (cipher->newctx != NULL) | |
1055 | break; | |
1056 | cipher->newctx = OSSL_get_OP_cipher_newctx(fns); | |
1057 | fnctxcnt++; | |
1058 | break; | |
1059 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1060 | if (cipher->einit != NULL) | |
1061 | break; | |
1062 | cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns); | |
1063 | fnciphcnt++; | |
1064 | break; | |
1065 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1066 | if (cipher->dinit != NULL) | |
1067 | break; | |
1068 | cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns); | |
1069 | fnciphcnt++; | |
1070 | break; | |
1071 | case OSSL_FUNC_CIPHER_UPDATE: | |
1072 | if (cipher->cupdate != NULL) | |
1073 | break; | |
1074 | cipher->cupdate = OSSL_get_OP_cipher_update(fns); | |
1075 | fnciphcnt++; | |
1076 | break; | |
1077 | case OSSL_FUNC_CIPHER_FINAL: | |
1078 | if (cipher->cfinal != NULL) | |
1079 | break; | |
1080 | cipher->cfinal = OSSL_get_OP_cipher_final(fns); | |
1081 | fnciphcnt++; | |
1082 | break; | |
718b133a MC |
1083 | case OSSL_FUNC_CIPHER_CIPHER: |
1084 | if (cipher->ccipher != NULL) | |
1085 | break; | |
1086 | cipher->ccipher = OSSL_get_OP_cipher_cipher(fns); | |
1087 | break; | |
df05f2ce MC |
1088 | case OSSL_FUNC_CIPHER_FREECTX: |
1089 | if (cipher->freectx != NULL) | |
1090 | break; | |
1091 | cipher->freectx = OSSL_get_OP_cipher_freectx(fns); | |
1092 | fnctxcnt++; | |
1093 | break; | |
1094 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1095 | if (cipher->dupctx != NULL) | |
1096 | break; | |
1097 | cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns); | |
1098 | break; | |
1099 | case OSSL_FUNC_CIPHER_KEY_LENGTH: | |
1100 | if (cipher->key_length != NULL) | |
1101 | break; | |
1102 | cipher->key_length = OSSL_get_OP_cipher_key_length(fns); | |
1103 | break; | |
718b133a MC |
1104 | case OSSL_FUNC_CIPHER_IV_LENGTH: |
1105 | if (cipher->iv_length != NULL) | |
1106 | break; | |
1107 | cipher->iv_length = OSSL_get_OP_cipher_iv_length(fns); | |
1108 | break; | |
1109 | case OSSL_FUNC_CIPHER_BLOCK_SIZE: | |
1110 | if (cipher->blocksize != NULL) | |
1111 | break; | |
1112 | cipher->blocksize = OSSL_get_OP_cipher_block_size(fns); | |
1113 | break; | |
df05f2ce MC |
1114 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1115 | if (cipher->get_params != NULL) | |
1116 | break; | |
1117 | cipher->get_params = OSSL_get_OP_cipher_get_params(fns); | |
1118 | break; | |
718b133a MC |
1119 | case OSSL_FUNC_CIPHER_CTX_GET_PARAMS: |
1120 | if (cipher->ctx_get_params != NULL) | |
1121 | break; | |
1122 | cipher->ctx_get_params = OSSL_get_OP_cipher_ctx_get_params(fns); | |
1123 | break; | |
1124 | case OSSL_FUNC_CIPHER_CTX_SET_PARAMS: | |
1125 | if (cipher->ctx_set_params != NULL) | |
df05f2ce | 1126 | break; |
718b133a | 1127 | cipher->ctx_set_params = OSSL_get_OP_cipher_ctx_set_params(fns); |
df05f2ce MC |
1128 | break; |
1129 | } | |
1130 | } | |
718b133a MC |
1131 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1132 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
dcd446f1 MC |
1133 | || fnctxcnt != 2 |
1134 | || cipher->blocksize == NULL | |
1135 | || cipher->iv_length == NULL | |
1136 | || cipher->key_length == NULL) { | |
df05f2ce MC |
1137 | /* |
1138 | * In order to be a consistent set of functions we must have at least | |
1139 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
718b133a | 1140 | * functions, or a single "cipher" function. In all cases we need a |
dcd446f1 MC |
1141 | * complete set of context management functions, as well as the |
1142 | * blocksize, iv_length and key_length functions. | |
df05f2ce MC |
1143 | */ |
1144 | EVP_CIPHER_meth_free(cipher); | |
1145 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); | |
1146 | return NULL; | |
1147 | } | |
1148 | cipher->prov = prov; | |
1149 | if (prov != NULL) | |
1150 | ossl_provider_upref(prov); | |
1151 | ||
1152 | return cipher; | |
1153 | } | |
1154 | ||
1155 | static int evp_cipher_upref(void *cipher) | |
1156 | { | |
1157 | return EVP_CIPHER_upref(cipher); | |
1158 | } | |
1159 | ||
1160 | static void evp_cipher_free(void *cipher) | |
1161 | { | |
1162 | EVP_CIPHER_meth_free(cipher); | |
1163 | } | |
1164 | ||
1165 | static int evp_cipher_nid(void *vcipher) | |
1166 | { | |
1167 | EVP_CIPHER *cipher = vcipher; | |
1168 | ||
1169 | return cipher->nid; | |
1170 | } | |
1171 | ||
1172 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, | |
1173 | const char *properties) | |
1174 | { | |
1175 | return evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
1176 | evp_cipher_from_dispatch, evp_cipher_upref, | |
1177 | evp_cipher_free, evp_cipher_nid); | |
1178 | } |