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