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