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Commit | Line | Data |
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62867571 | 1 | /* |
33388b44 | 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
d02b48c6 RE |
8 | */ |
9 | ||
e4468e6d P |
10 | /* We need to use some engine deprecated APIs */ |
11 | #define OPENSSL_SUPPRESS_DEPRECATED | |
12 | ||
d02b48c6 | 13 | #include <stdio.h> |
c3a73daf | 14 | #include <assert.h> |
b39fc560 | 15 | #include "internal/cryptlib.h" |
ec577822 | 16 | #include <openssl/evp.h> |
7f060601 | 17 | #include <openssl/err.h> |
3a87a9b9 | 18 | #include <openssl/rand.h> |
3c27208f | 19 | #include <openssl/engine.h> |
df05f2ce MC |
20 | #include <openssl/params.h> |
21 | #include <openssl/core_names.h> | |
25f2138b | 22 | #include "crypto/evp.h" |
df05f2ce | 23 | #include "internal/provider.h" |
706457b7 | 24 | #include "evp_local.h" |
d02b48c6 | 25 | |
df05f2ce | 26 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) |
0f113f3e | 27 | { |
df05f2ce | 28 | if (ctx == NULL) |
8baf9968 | 29 | return 1; |
df05f2ce MC |
30 | |
31 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) | |
32 | goto legacy; | |
33 | ||
34 | if (ctx->provctx != NULL) { | |
35 | if (ctx->cipher->freectx != NULL) | |
36 | ctx->cipher->freectx(ctx->provctx); | |
37 | ctx->provctx = NULL; | |
38 | } | |
39 | if (ctx->fetched_cipher != NULL) | |
550f974a | 40 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
41 | memset(ctx, 0, sizeof(*ctx)); |
42 | ||
43 | return 1; | |
44 | ||
45 | /* TODO(3.0): Remove legacy code below */ | |
46 | legacy: | |
47 | ||
48 | if (ctx->cipher != NULL) { | |
49 | if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) | |
8baf9968 RL |
50 | return 0; |
51 | /* Cleanse cipher context data */ | |
df05f2ce MC |
52 | if (ctx->cipher_data && ctx->cipher->ctx_size) |
53 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
8baf9968 | 54 | } |
df05f2ce | 55 | OPENSSL_free(ctx->cipher_data); |
f844f9eb | 56 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 57 | ENGINE_finish(ctx->engine); |
8baf9968 | 58 | #endif |
df05f2ce | 59 | memset(ctx, 0, sizeof(*ctx)); |
8baf9968 | 60 | return 1; |
0f113f3e | 61 | } |
d02b48c6 | 62 | |
b40228a6 | 63 | EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) |
0f113f3e | 64 | { |
8baf9968 RL |
65 | return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX)); |
66 | } | |
67 | ||
68 | void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) | |
69 | { | |
70 | EVP_CIPHER_CTX_reset(ctx); | |
71 | OPENSSL_free(ctx); | |
0f113f3e | 72 | } |
581f1c84 | 73 | |
360370d9 | 74 | int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
75 | const unsigned char *key, const unsigned char *iv, int enc) |
76 | { | |
ffd23209 KR |
77 | if (cipher != NULL) |
78 | EVP_CIPHER_CTX_reset(ctx); | |
0f113f3e MC |
79 | return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc); |
80 | } | |
81 | ||
82 | int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, | |
83 | ENGINE *impl, const unsigned char *key, | |
84 | const unsigned char *iv, int enc) | |
85 | { | |
f844f9eb | 86 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 87 | ENGINE *tmpimpl = NULL; |
319e518a | 88 | #endif |
df05f2ce MC |
89 | /* |
90 | * enc == 1 means we are encrypting. | |
91 | * enc == 0 means we are decrypting. | |
92 | * enc == -1 means, use the previously initialised value for encrypt/decrypt | |
93 | */ | |
94 | if (enc == -1) { | |
0f113f3e | 95 | enc = ctx->encrypt; |
df05f2ce | 96 | } else { |
0f113f3e MC |
97 | if (enc) |
98 | enc = 1; | |
99 | ctx->encrypt = enc; | |
100 | } | |
df05f2ce MC |
101 | |
102 | if (cipher == NULL && ctx->cipher == NULL) { | |
103 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET); | |
104 | return 0; | |
105 | } | |
106 | ||
107 | /* TODO(3.0): Legacy work around code below. Remove this */ | |
108 | ||
f844f9eb | 109 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
110 | /* |
111 | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so | |
112 | * this context may already have an ENGINE! Try to avoid releasing the | |
113 | * previous handle, re-querying for an ENGINE, and having a | |
0d4fb843 | 114 | * reinitialisation, when it may all be unnecessary. |
0f113f3e | 115 | */ |
f6b94279 | 116 | if (ctx->engine && ctx->cipher |
a7f9e0a4 | 117 | && (cipher == NULL || cipher->nid == ctx->cipher->nid)) |
0f113f3e | 118 | goto skip_to_init; |
df05f2ce MC |
119 | |
120 | if (cipher != NULL && impl == NULL) { | |
121 | /* Ask if an ENGINE is reserved for this job */ | |
122 | tmpimpl = ENGINE_get_cipher_engine(cipher->nid); | |
123 | } | |
0b13e9f0 | 124 | #endif |
df05f2ce MC |
125 | |
126 | /* | |
127 | * If there are engines involved then we should use legacy handling for now. | |
128 | */ | |
129 | if (ctx->engine != NULL | |
f844f9eb | 130 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
319e518a MC |
131 | || tmpimpl != NULL |
132 | #endif | |
133 | || impl != NULL) { | |
df05f2ce MC |
134 | if (ctx->cipher == ctx->fetched_cipher) |
135 | ctx->cipher = NULL; | |
550f974a | 136 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
137 | ctx->fetched_cipher = NULL; |
138 | goto legacy; | |
139 | } | |
df05f2ce MC |
140 | /* |
141 | * Ensure a context left lying around from last time is cleared | |
142 | * (legacy code) | |
143 | */ | |
144 | if (cipher != NULL && ctx->cipher != NULL) { | |
145 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
146 | ctx->cipher_data = NULL; | |
147 | } | |
148 | ||
149 | ||
150 | /* TODO(3.0): Start of non-legacy code below */ | |
151 | ||
152 | /* Ensure a context left lying around from last time is cleared */ | |
153 | if (cipher != NULL && ctx->cipher != NULL) { | |
154 | unsigned long flags = ctx->flags; | |
155 | ||
156 | EVP_CIPHER_CTX_reset(ctx); | |
157 | /* Restore encrypt and flags */ | |
158 | ctx->encrypt = enc; | |
159 | ctx->flags = flags; | |
160 | } | |
161 | ||
7f612b1f | 162 | if (cipher == NULL) |
df05f2ce MC |
163 | cipher = ctx->cipher; |
164 | ||
165 | if (cipher->prov == NULL) { | |
f844f9eb | 166 | #ifdef FIPS_MODULE |
79c44b4e | 167 | /* We only do explicit fetches inside the FIPS module */ |
319e518a MC |
168 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
169 | return 0; | |
170 | #else | |
171 | EVP_CIPHER *provciph = | |
068489a2 MC |
172 | EVP_CIPHER_fetch(NULL, |
173 | cipher->nid == NID_undef ? "NULL" | |
174 | : OBJ_nid2sn(cipher->nid), | |
175 | ""); | |
319e518a | 176 | |
df05f2ce MC |
177 | if (provciph == NULL) { |
178 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
179 | return 0; | |
180 | } | |
181 | cipher = provciph; | |
550f974a | 182 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 183 | ctx->fetched_cipher = provciph; |
319e518a | 184 | #endif |
df05f2ce MC |
185 | } |
186 | ||
187 | ctx->cipher = cipher; | |
188 | if (ctx->provctx == NULL) { | |
a39eb840 | 189 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
df05f2ce MC |
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 | ||
344cfa34 MC |
211 | return ctx->cipher->einit(ctx->provctx, |
212 | key, | |
33b40a10 MC |
213 | key == NULL ? 0 |
214 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 215 | iv, |
33b40a10 MC |
216 | iv == NULL ? 0 |
217 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
218 | } |
219 | ||
220 | if (ctx->cipher->dinit == NULL) { | |
221 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
222 | return 0; | |
223 | } | |
224 | ||
344cfa34 MC |
225 | return ctx->cipher->dinit(ctx->provctx, |
226 | key, | |
33b40a10 MC |
227 | key == NULL ? 0 |
228 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 229 | iv, |
33b40a10 MC |
230 | iv == NULL ? 0 |
231 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
232 | |
233 | /* TODO(3.0): Remove legacy code below */ | |
234 | legacy: | |
235 | ||
236 | if (cipher != NULL) { | |
237 | /* | |
238 | * Ensure a context left lying around from last time is cleared (we | |
239 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
240 | * EVP_CIPHER could be used). |
241 | */ | |
242 | if (ctx->cipher) { | |
243 | unsigned long flags = ctx->flags; | |
c0ca39bd | 244 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
245 | /* Restore encrypt and flags */ |
246 | ctx->encrypt = enc; | |
247 | ctx->flags = flags; | |
248 | } | |
f844f9eb | 249 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 250 | if (impl != NULL) { |
0f113f3e MC |
251 | if (!ENGINE_init(impl)) { |
252 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
253 | return 0; | |
254 | } | |
df05f2ce MC |
255 | } else { |
256 | impl = tmpimpl; | |
257 | } | |
258 | if (impl != NULL) { | |
0f113f3e MC |
259 | /* There's an ENGINE for this job ... (apparently) */ |
260 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
261 | |
262 | if (c == NULL) { | |
0f113f3e MC |
263 | /* |
264 | * One positive side-effect of US's export control history, | |
265 | * is that we should at least be able to avoid using US | |
0d4fb843 | 266 | * misspellings of "initialisation"? |
0f113f3e MC |
267 | */ |
268 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
269 | return 0; | |
270 | } | |
271 | /* We'll use the ENGINE's private cipher definition */ | |
272 | cipher = c; | |
273 | /* | |
274 | * Store the ENGINE functional reference so we know 'cipher' came | |
275 | * from an ENGINE and we need to release it when done. | |
276 | */ | |
277 | ctx->engine = impl; | |
df05f2ce | 278 | } else { |
0f113f3e | 279 | ctx->engine = NULL; |
df05f2ce | 280 | } |
0b13e9f0 | 281 | #endif |
544a2aea | 282 | |
0f113f3e MC |
283 | ctx->cipher = cipher; |
284 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 285 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 286 | if (ctx->cipher_data == NULL) { |
273a0218 | 287 | ctx->cipher = NULL; |
0f113f3e MC |
288 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); |
289 | return 0; | |
290 | } | |
291 | } else { | |
292 | ctx->cipher_data = NULL; | |
293 | } | |
294 | ctx->key_len = cipher->key_len; | |
295 | /* Preserve wrap enable flag, zero everything else */ | |
296 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
297 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
298 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 299 | ctx->cipher = NULL; |
0f113f3e MC |
300 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
301 | return 0; | |
302 | } | |
303 | } | |
0f113f3e | 304 | } |
f844f9eb | 305 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e | 306 | skip_to_init: |
0b13e9f0 | 307 | #endif |
1702c500 P |
308 | if (ctx->cipher == NULL) |
309 | return 0; | |
310 | ||
0f113f3e MC |
311 | /* we assume block size is a power of 2 in *cryptUpdate */ |
312 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
313 | || ctx->cipher->block_size == 8 | |
314 | || ctx->cipher->block_size == 16); | |
315 | ||
316 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
317 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
318 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
319 | return 0; | |
320 | } | |
321 | ||
480d3323 | 322 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
323 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
324 | ||
325 | case EVP_CIPH_STREAM_CIPHER: | |
326 | case EVP_CIPH_ECB_MODE: | |
327 | break; | |
328 | ||
329 | case EVP_CIPH_CFB_MODE: | |
330 | case EVP_CIPH_OFB_MODE: | |
331 | ||
332 | ctx->num = 0; | |
333 | /* fall-through */ | |
334 | ||
335 | case EVP_CIPH_CBC_MODE: | |
336 | ||
337 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
338 | (int)sizeof(ctx->iv)); | |
339 | if (iv) | |
340 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
341 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
342 | break; | |
343 | ||
344 | case EVP_CIPH_CTR_MODE: | |
345 | ctx->num = 0; | |
346 | /* Don't reuse IV for CTR mode */ | |
347 | if (iv) | |
348 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
349 | break; | |
350 | ||
351 | default: | |
352 | return 0; | |
0f113f3e MC |
353 | } |
354 | } | |
355 | ||
356 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
357 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
358 | return 0; | |
359 | } | |
360 | ctx->buf_len = 0; | |
361 | ctx->final_used = 0; | |
362 | ctx->block_mask = ctx->cipher->block_size - 1; | |
363 | return 1; | |
364 | } | |
d02b48c6 | 365 | |
be06a934 | 366 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
367 | const unsigned char *in, int inl) |
368 | { | |
369 | if (ctx->encrypt) | |
370 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
371 | else | |
372 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
373 | } | |
d02b48c6 | 374 | |
581f1c84 | 375 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
376 | { |
377 | if (ctx->encrypt) | |
378 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
379 | else | |
380 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
381 | } | |
581f1c84 | 382 | |
6b691a5c | 383 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
384 | { |
385 | if (ctx->encrypt) | |
386 | return EVP_EncryptFinal(ctx, out, outl); | |
387 | else | |
388 | return EVP_DecryptFinal(ctx, out, outl); | |
389 | } | |
d02b48c6 | 390 | |
be06a934 | 391 | int EVP_EncryptInit(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, 1); | |
395 | } | |
18eda732 | 396 | |
0f113f3e MC |
397 | int EVP_EncryptInit_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, 1); | |
402 | } | |
d02b48c6 | 403 | |
be06a934 | 404 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
405 | const unsigned char *key, const unsigned char *iv) |
406 | { | |
407 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
408 | } | |
18eda732 | 409 | |
0f113f3e MC |
410 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
411 | ENGINE *impl, const unsigned char *key, | |
412 | const unsigned char *iv) | |
413 | { | |
414 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
415 | } | |
d02b48c6 | 416 | |
c3a73daf AP |
417 | /* |
418 | * According to the letter of standard difference between pointers | |
419 | * is specified to be valid only within same object. This makes | |
420 | * it formally challenging to determine if input and output buffers | |
421 | * are not partially overlapping with standard pointer arithmetic. | |
422 | */ | |
423 | #ifdef PTRDIFF_T | |
424 | # undef PTRDIFF_T | |
425 | #endif | |
426 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
427 | /* | |
428 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
429 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
430 | * difference between two pointers might be truncated to 32 bits. | |
431 | * In the context one can even wonder how comparison for | |
432 | * equality is implemented. To be on the safe side we adhere to | |
433 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
434 | */ |
435 | # define PTRDIFF_T uint64_t | |
436 | #else | |
437 | # define PTRDIFF_T size_t | |
438 | #endif | |
439 | ||
7141ba31 | 440 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
441 | { |
442 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
443 | /* | |
444 | * Check for partially overlapping buffers. [Binary logical | |
445 | * operations are used instead of boolean to minimize number | |
446 | * of conditional branches.] | |
447 | */ | |
83151b73 AP |
448 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
449 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 450 | |
83151b73 | 451 | return overlapped; |
c3a73daf AP |
452 | } |
453 | ||
a8bf2f8f RL |
454 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
455 | unsigned char *out, int *outl, | |
456 | const unsigned char *in, int inl) | |
0f113f3e | 457 | { |
64846096 LP |
458 | int i, j, bl, cmpl = inl; |
459 | ||
460 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
461 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 462 | |
7141ba31 MC |
463 | bl = ctx->cipher->block_size; |
464 | ||
0f113f3e | 465 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 466 | /* If block size > 1 then the cipher will have to do this check */ |
64846096 | 467 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { |
a8bf2f8f | 468 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 469 | return 0; |
83151b73 | 470 | } |
5fc77684 | 471 | |
0f113f3e MC |
472 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
473 | if (i < 0) | |
474 | return 0; | |
475 | else | |
476 | *outl = i; | |
477 | return 1; | |
478 | } | |
479 | ||
2c236894 MC |
480 | if (inl <= 0) { |
481 | *outl = 0; | |
482 | return inl == 0; | |
483 | } | |
64846096 | 484 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
a8bf2f8f | 485 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 486 | return 0; |
83151b73 | 487 | } |
0f113f3e MC |
488 | |
489 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
490 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
491 | *outl = inl; | |
492 | return 1; | |
493 | } else { | |
494 | *outl = 0; | |
495 | return 0; | |
496 | } | |
497 | } | |
498 | i = ctx->buf_len; | |
0f113f3e MC |
499 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
500 | if (i != 0) { | |
3f358213 | 501 | if (bl - i > inl) { |
0f113f3e MC |
502 | memcpy(&(ctx->buf[i]), in, inl); |
503 | ctx->buf_len += inl; | |
504 | *outl = 0; | |
505 | return 1; | |
506 | } else { | |
507 | j = bl - i; | |
508 | memcpy(&(ctx->buf[i]), in, j); | |
0f113f3e MC |
509 | inl -= j; |
510 | in += j; | |
5fc77684 AP |
511 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
512 | return 0; | |
0f113f3e MC |
513 | out += bl; |
514 | *outl = bl; | |
515 | } | |
516 | } else | |
517 | *outl = 0; | |
518 | i = inl & (bl - 1); | |
519 | inl -= i; | |
520 | if (inl > 0) { | |
521 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
522 | return 0; | |
523 | *outl += inl; | |
524 | } | |
525 | ||
526 | if (i != 0) | |
527 | memcpy(ctx->buf, &(in[inl]), i); | |
528 | ctx->buf_len = i; | |
529 | return 1; | |
530 | } | |
d02b48c6 | 531 | |
a8bf2f8f RL |
532 | |
533 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
534 | const unsigned char *in, int inl) | |
535 | { | |
df05f2ce MC |
536 | int ret; |
537 | size_t soutl; | |
3b94944c | 538 | int blocksize; |
df05f2ce | 539 | |
a8bf2f8f RL |
540 | /* Prevent accidental use of decryption context when encrypting */ |
541 | if (!ctx->encrypt) { | |
542 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
543 | return 0; | |
544 | } | |
545 | ||
d4d89a07 SS |
546 | if (ctx->cipher == NULL) { |
547 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
552 | goto legacy; |
553 | ||
3b94944c MC |
554 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
555 | ||
556 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
557 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); |
558 | return 0; | |
559 | } | |
3b94944c MC |
560 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
561 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
562 | (size_t)inl); | |
df05f2ce | 563 | |
36e619d7 GV |
564 | if (ret) { |
565 | if (soutl > INT_MAX) { | |
566 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
567 | return 0; | |
568 | } | |
569 | *outl = soutl; | |
df05f2ce | 570 | } |
36e619d7 | 571 | |
df05f2ce MC |
572 | return ret; |
573 | ||
574 | /* TODO(3.0): Remove legacy code below */ | |
575 | legacy: | |
576 | ||
a8bf2f8f RL |
577 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
578 | } | |
579 | ||
be06a934 | 580 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
581 | { |
582 | int ret; | |
583 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
584 | return ret; | |
585 | } | |
581f1c84 DSH |
586 | |
587 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
588 | { |
589 | int n, ret; | |
590 | unsigned int i, b, bl; | |
df05f2ce | 591 | size_t soutl; |
3b94944c | 592 | int blocksize; |
0f113f3e | 593 | |
a8bf2f8f RL |
594 | /* Prevent accidental use of decryption context when encrypting */ |
595 | if (!ctx->encrypt) { | |
596 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
597 | return 0; | |
598 | } | |
599 | ||
4894dcad P |
600 | if (ctx->cipher == NULL) { |
601 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
602 | return 0; | |
603 | } | |
604 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
605 | goto legacy; |
606 | ||
3b94944c MC |
607 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
608 | ||
609 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
610 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
611 | return 0; | |
612 | } | |
613 | ||
3b94944c MC |
614 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
615 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce | 616 | |
36e619d7 GV |
617 | if (ret) { |
618 | if (soutl > INT_MAX) { | |
619 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
620 | return 0; | |
621 | } | |
622 | *outl = soutl; | |
df05f2ce | 623 | } |
df05f2ce MC |
624 | |
625 | return ret; | |
626 | ||
627 | /* TODO(3.0): Remove legacy code below */ | |
628 | legacy: | |
629 | ||
0f113f3e MC |
630 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
631 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
632 | if (ret < 0) | |
633 | return 0; | |
634 | else | |
635 | *outl = ret; | |
636 | return 1; | |
637 | } | |
638 | ||
639 | b = ctx->cipher->block_size; | |
cbe29648 | 640 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
641 | if (b == 1) { |
642 | *outl = 0; | |
643 | return 1; | |
644 | } | |
645 | bl = ctx->buf_len; | |
646 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
647 | if (bl) { | |
648 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
649 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
650 | return 0; | |
651 | } | |
652 | *outl = 0; | |
653 | return 1; | |
654 | } | |
655 | ||
656 | n = b - bl; | |
657 | for (i = bl; i < b; i++) | |
658 | ctx->buf[i] = n; | |
659 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
660 | ||
661 | if (ret) | |
662 | *outl = b; | |
663 | ||
664 | return ret; | |
665 | } | |
d02b48c6 | 666 | |
be06a934 | 667 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
668 | const unsigned char *in, int inl) |
669 | { | |
df05f2ce | 670 | int fix_len, cmpl = inl, ret; |
0f113f3e | 671 | unsigned int b; |
df05f2ce | 672 | size_t soutl; |
3b94944c | 673 | int blocksize; |
0f113f3e | 674 | |
a8bf2f8f RL |
675 | /* Prevent accidental use of encryption context when decrypting */ |
676 | if (ctx->encrypt) { | |
677 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
678 | return 0; | |
679 | } | |
680 | ||
d2c2e49e P |
681 | if (ctx->cipher == NULL) { |
682 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
683 | return 0; | |
684 | } | |
685 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
686 | goto legacy; |
687 | ||
3b94944c MC |
688 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
689 | ||
690 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
691 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); |
692 | return 0; | |
693 | } | |
3b94944c MC |
694 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
695 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
696 | (size_t)inl); | |
df05f2ce MC |
697 | |
698 | if (ret) { | |
699 | if (soutl > INT_MAX) { | |
700 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
701 | return 0; | |
702 | } | |
703 | *outl = soutl; | |
704 | } | |
705 | ||
706 | return ret; | |
707 | ||
708 | /* TODO(3.0): Remove legacy code below */ | |
709 | legacy: | |
710 | ||
7141ba31 MC |
711 | b = ctx->cipher->block_size; |
712 | ||
64846096 LP |
713 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
714 | cmpl = (cmpl + 7) / 8; | |
715 | ||
0f113f3e | 716 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
64846096 | 717 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { |
83151b73 | 718 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 719 | return 0; |
83151b73 | 720 | } |
5fc77684 | 721 | |
0f113f3e MC |
722 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
723 | if (fix_len < 0) { | |
724 | *outl = 0; | |
725 | return 0; | |
726 | } else | |
727 | *outl = fix_len; | |
728 | return 1; | |
729 | } | |
730 | ||
2c236894 MC |
731 | if (inl <= 0) { |
732 | *outl = 0; | |
733 | return inl == 0; | |
734 | } | |
735 | ||
0f113f3e | 736 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 737 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 738 | |
cbe29648 | 739 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
740 | |
741 | if (ctx->final_used) { | |
5fc77684 AP |
742 | /* see comment about PTRDIFF_T comparison above */ |
743 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
83151b73 AP |
744 | || is_partially_overlapping(out, in, b)) { |
745 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
5fc77684 | 746 | return 0; |
83151b73 | 747 | } |
0f113f3e MC |
748 | memcpy(out, ctx->final, b); |
749 | out += b; | |
750 | fix_len = 1; | |
751 | } else | |
752 | fix_len = 0; | |
753 | ||
a8bf2f8f | 754 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
755 | return 0; |
756 | ||
757 | /* | |
758 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
759 | * copy of this last block | |
760 | */ | |
761 | if (b > 1 && !ctx->buf_len) { | |
762 | *outl -= b; | |
763 | ctx->final_used = 1; | |
764 | memcpy(ctx->final, &out[*outl], b); | |
765 | } else | |
766 | ctx->final_used = 0; | |
767 | ||
768 | if (fix_len) | |
769 | *outl += b; | |
770 | ||
771 | return 1; | |
772 | } | |
d02b48c6 | 773 | |
6b691a5c | 774 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
775 | { |
776 | int ret; | |
777 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
778 | return ret; | |
779 | } | |
581f1c84 DSH |
780 | |
781 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
782 | { |
783 | int i, n; | |
784 | unsigned int b; | |
df05f2ce MC |
785 | size_t soutl; |
786 | int ret; | |
3b94944c | 787 | int blocksize; |
a8bf2f8f RL |
788 | |
789 | /* Prevent accidental use of encryption context when decrypting */ | |
790 | if (ctx->encrypt) { | |
791 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
792 | return 0; | |
793 | } | |
794 | ||
d4d89a07 SS |
795 | if (ctx->cipher == NULL) { |
796 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
801 | goto legacy; |
802 | ||
3b94944c MC |
803 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
804 | ||
805 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
806 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
807 | return 0; | |
808 | } | |
809 | ||
3b94944c MC |
810 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
811 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
812 | |
813 | if (ret) { | |
814 | if (soutl > INT_MAX) { | |
815 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
816 | return 0; | |
817 | } | |
818 | *outl = soutl; | |
819 | } | |
820 | ||
821 | return ret; | |
822 | ||
823 | /* TODO(3.0): Remove legacy code below */ | |
824 | legacy: | |
825 | ||
0f113f3e | 826 | *outl = 0; |
0f113f3e MC |
827 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
828 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
829 | if (i < 0) | |
830 | return 0; | |
831 | else | |
832 | *outl = i; | |
833 | return 1; | |
834 | } | |
835 | ||
836 | b = ctx->cipher->block_size; | |
837 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
838 | if (ctx->buf_len) { | |
839 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
840 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
841 | return 0; | |
842 | } | |
843 | *outl = 0; | |
844 | return 1; | |
845 | } | |
846 | if (b > 1) { | |
847 | if (ctx->buf_len || !ctx->final_used) { | |
848 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
26a7d938 | 849 | return 0; |
0f113f3e | 850 | } |
cbe29648 | 851 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
852 | |
853 | /* | |
854 | * The following assumes that the ciphertext has been authenticated. | |
855 | * Otherwise it provides a padding oracle. | |
856 | */ | |
857 | n = ctx->final[b - 1]; | |
858 | if (n == 0 || n > (int)b) { | |
859 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 860 | return 0; |
0f113f3e MC |
861 | } |
862 | for (i = 0; i < n; i++) { | |
863 | if (ctx->final[--b] != n) { | |
864 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 865 | return 0; |
0f113f3e MC |
866 | } |
867 | } | |
868 | n = ctx->cipher->block_size - n; | |
869 | for (i = 0; i < n; i++) | |
870 | out[i] = ctx->final[i]; | |
871 | *outl = n; | |
872 | } else | |
873 | *outl = 0; | |
208fb891 | 874 | return 1; |
0f113f3e | 875 | } |
d02b48c6 | 876 | |
6343829a | 877 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 878 | { |
d23adad1 MC |
879 | if (c->cipher->prov != NULL) { |
880 | int ok; | |
881 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
882 | size_t len = keylen; | |
459b15d4 | 883 | |
d23adad1 MC |
884 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
885 | return 1; | |
886 | ||
887 | /* Check the cipher actually understands this parameter */ | |
888 | if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher), | |
889 | OSSL_CIPHER_PARAM_KEYLEN) == NULL) | |
890 | return 0; | |
891 | ||
892 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); | |
893 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params); | |
13273237 | 894 | |
d23adad1 MC |
895 | return ok > 0 ? 1 : 0; |
896 | } | |
13273237 RL |
897 | |
898 | /* TODO(3.0) legacy code follows */ | |
d23adad1 MC |
899 | |
900 | /* | |
901 | * Note there have never been any built-in ciphers that define this flag | |
902 | * since it was first introduced. | |
903 | */ | |
0f113f3e MC |
904 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
905 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 906 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
907 | return 1; |
908 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
909 | c->key_len = keylen; | |
910 | return 1; | |
911 | } | |
912 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
913 | return 0; | |
914 | } | |
49528751 | 915 | |
f2e5ca84 | 916 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 917 | { |
13273237 | 918 | int ok; |
459b15d4 | 919 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
1c3ace68 | 920 | unsigned int pd = pad; |
13273237 | 921 | |
0f113f3e MC |
922 | if (pad) |
923 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
924 | else | |
925 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 926 | |
1c3ace68 | 927 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
459b15d4 SL |
928 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
929 | ||
13273237 | 930 | return ok != 0; |
0f113f3e | 931 | } |
f2e5ca84 | 932 | |
49528751 DSH |
933 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
934 | { | |
e870791a | 935 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 | 936 | int set_params = 1; |
1c3ace68 | 937 | size_t sz = arg; |
6a41156c | 938 | unsigned int i; |
0d2bfe52 SL |
939 | OSSL_PARAM params[4] = { |
940 | OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END | |
941 | }; | |
d91f4568 | 942 | |
459b15d4 | 943 | if (ctx == NULL || ctx->cipher == NULL) { |
0f113f3e MC |
944 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); |
945 | return 0; | |
946 | } | |
947 | ||
13273237 RL |
948 | if (ctx->cipher->prov == NULL) |
949 | goto legacy; | |
950 | ||
951 | switch (type) { | |
952 | case EVP_CTRL_SET_KEY_LENGTH: | |
1c3ace68 | 953 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
13273237 RL |
954 | break; |
955 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
4a42e264 SL |
956 | set_params = 0; |
957 | params[0] = | |
958 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1c3ace68 | 959 | ptr, sz); |
4a42e264 SL |
960 | break; |
961 | ||
d6d74cf4 RL |
962 | case EVP_CTRL_INIT: |
963 | /* | |
964 | * TODO(3.0) EVP_CTRL_INIT is purely legacy, no provider counterpart | |
965 | * As a matter of fact, this should be dead code, but some caller | |
966 | * might still do a direct control call with this command, so... | |
967 | * Legacy methods return 1 except for exceptional circumstances, so | |
968 | * we do the same here to not be disruptive. | |
969 | */ | |
970 | return 1; | |
13273237 | 971 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
459b15d4 | 972 | default: |
6a36f209 | 973 | goto end; |
459b15d4 SL |
974 | case EVP_CTRL_GET_IV: |
975 | set_params = 0; | |
976 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, | |
1c3ace68 | 977 | ptr, sz); |
459b15d4 SL |
978 | break; |
979 | case EVP_CTRL_AEAD_SET_IVLEN: | |
980 | if (arg < 0) | |
981 | return 0; | |
1c3ace68 | 982 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
13273237 | 983 | break; |
11b44359 SL |
984 | case EVP_CTRL_AEAD_SET_IV_FIXED: |
985 | params[0] = OSSL_PARAM_construct_octet_string( | |
986 | OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz); | |
987 | break; | |
988 | case EVP_CTRL_GCM_IV_GEN: | |
989 | set_params = 0; | |
990 | if (arg < 0) | |
991 | sz = 0; /* special case that uses the iv length */ | |
992 | params[0] = OSSL_PARAM_construct_octet_string( | |
993 | OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz); | |
994 | break; | |
995 | case EVP_CTRL_GCM_SET_IV_INV: | |
996 | if (arg < 0) | |
997 | return 0; | |
998 | params[0] = OSSL_PARAM_construct_octet_string( | |
999 | OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz); | |
459b15d4 | 1000 | break; |
6a41156c SL |
1001 | case EVP_CTRL_GET_RC5_ROUNDS: |
1002 | set_params = 0; /* Fall thru */ | |
1003 | case EVP_CTRL_SET_RC5_ROUNDS: | |
1004 | if (arg < 0) | |
1005 | return 0; | |
1006 | i = (unsigned int)arg; | |
1007 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i); | |
1008 | break; | |
eb173822 SL |
1009 | case EVP_CTRL_SET_SPEED: |
1010 | if (arg < 0) | |
1011 | return 0; | |
1012 | i = (unsigned int)arg; | |
1013 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i); | |
1014 | break; | |
459b15d4 | 1015 | case EVP_CTRL_AEAD_GET_TAG: |
1c3ace68 SL |
1016 | set_params = 0; /* Fall thru */ |
1017 | case EVP_CTRL_AEAD_SET_TAG: | |
459b15d4 | 1018 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
1c3ace68 | 1019 | ptr, sz); |
459b15d4 SL |
1020 | break; |
1021 | case EVP_CTRL_AEAD_TLS1_AAD: | |
0d2bfe52 | 1022 | /* This one does a set and a get - since it returns a size */ |
459b15d4 SL |
1023 | params[0] = |
1024 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1c3ace68 | 1025 | ptr, sz); |
459b15d4 SL |
1026 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1027 | if (ret <= 0) | |
6a36f209 | 1028 | goto end; |
459b15d4 SL |
1029 | params[0] = |
1030 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1031 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1032 | if (ret <= 0) | |
6a36f209 | 1033 | goto end; |
459b15d4 | 1034 | return sz; |
f816aa47 SL |
1035 | #ifndef OPENSSL_NO_RC2 |
1036 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
1037 | set_params = 0; /* Fall thru */ | |
1038 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
1039 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz); | |
1040 | break; | |
1041 | #endif /* OPENSSL_NO_RC2 */ | |
0d2bfe52 SL |
1042 | #if !defined(OPENSSL_NO_MULTIBLOCK) |
1043 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE: | |
1044 | params[0] = OSSL_PARAM_construct_size_t( | |
1045 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz); | |
1046 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1047 | if (ret <= 0) | |
1048 | return 0; | |
1049 | ||
1050 | params[0] = OSSL_PARAM_construct_size_t( | |
1051 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz); | |
1052 | params[1] = OSSL_PARAM_construct_end(); | |
1053 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1054 | if (ret <= 0) | |
1055 | return 0; | |
1056 | return sz; | |
1057 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: { | |
1058 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1059 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1060 | ||
1061 | if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) | |
1062 | return 0; | |
1063 | ||
1064 | params[0] = OSSL_PARAM_construct_octet_string( | |
1065 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len); | |
1066 | params[1] = OSSL_PARAM_construct_uint( | |
1067 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1068 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1069 | if (ret <= 0) | |
1070 | return ret; | |
1071 | /* Retrieve the return values changed by the set */ | |
1072 | params[0] = OSSL_PARAM_construct_size_t( | |
1073 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz); | |
1074 | params[1] = OSSL_PARAM_construct_uint( | |
1075 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1076 | params[2] = OSSL_PARAM_construct_end(); | |
1077 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1078 | if (ret <= 0) | |
1079 | return 0; | |
1080 | return sz; | |
1081 | } | |
1082 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: { | |
1083 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1084 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1085 | ||
1086 | params[0] = OSSL_PARAM_construct_octet_string( | |
1087 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len); | |
1088 | ||
1089 | params[1] = OSSL_PARAM_construct_octet_string( | |
1090 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp, | |
1091 | p->len); | |
1092 | params[2] = OSSL_PARAM_construct_uint( | |
1093 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1094 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1095 | if (ret <= 0) | |
1096 | return ret; | |
1097 | params[0] = OSSL_PARAM_construct_size_t( | |
1098 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz); | |
1099 | params[1] = OSSL_PARAM_construct_end(); | |
1100 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1101 | if (ret <= 0) | |
1102 | return 0; | |
1103 | return sz; | |
1104 | } | |
1105 | #endif /* OPENSSL_NO_MULTIBLOCK */ | |
1106 | case EVP_CTRL_AEAD_SET_MAC_KEY: | |
1107 | if (arg < 0) | |
1108 | return -1; | |
1109 | params[0] = OSSL_PARAM_construct_octet_string( | |
1110 | OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz); | |
1111 | break; | |
13273237 | 1112 | } |
459b15d4 SL |
1113 | |
1114 | if (set_params) | |
1115 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1116 | else | |
1117 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
6a36f209 | 1118 | goto end; |
13273237 | 1119 | |
459b15d4 SL |
1120 | /* TODO(3.0): Remove legacy code below */ |
1121 | legacy: | |
1122 | if (ctx->cipher->ctrl == NULL) { | |
0f113f3e MC |
1123 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
552be00d | 1128 | |
6a36f209 | 1129 | end: |
e870791a | 1130 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
0f113f3e MC |
1131 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, |
1132 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
1133 | return 0; | |
1134 | } | |
1135 | return ret; | |
49528751 | 1136 | } |
216659eb | 1137 | |
ae3ff60e RL |
1138 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
1139 | { | |
1140 | if (cipher != NULL && cipher->get_params != NULL) | |
1141 | return cipher->get_params(params); | |
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1146 | { | |
92d9d0ae RL |
1147 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) |
1148 | return ctx->cipher->set_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1149 | return 0; |
1150 | } | |
1151 | ||
1152 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1153 | { | |
92d9d0ae RL |
1154 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
1155 | return ctx->cipher->get_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1156 | return 0; |
1157 | } | |
1158 | ||
1159 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1160 | { | |
1161 | if (cipher != NULL && cipher->gettable_params != NULL) | |
18ec26ba P |
1162 | return cipher->gettable_params( |
1163 | ossl_provider_ctx(EVP_CIPHER_provider(cipher))); | |
ae3ff60e RL |
1164 | return NULL; |
1165 | } | |
1166 | ||
41f7ecf3 | 1167 | const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e RL |
1168 | { |
1169 | if (cipher != NULL && cipher->settable_ctx_params != NULL) | |
18ec26ba P |
1170 | return cipher->settable_ctx_params( |
1171 | ossl_provider_ctx(EVP_CIPHER_provider(cipher))); | |
ae3ff60e RL |
1172 | return NULL; |
1173 | } | |
1174 | ||
41f7ecf3 | 1175 | const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e RL |
1176 | { |
1177 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) | |
18ec26ba P |
1178 | return cipher->gettable_ctx_params( |
1179 | ossl_provider_ctx(EVP_CIPHER_provider(cipher))); | |
ae3ff60e RL |
1180 | return NULL; |
1181 | } | |
1182 | ||
216659eb | 1183 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e MC |
1184 | { |
1185 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1186 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4a42e264 | 1187 | |
f844f9eb | 1188 | #ifdef FIPS_MODULE |
4a42e264 SL |
1189 | return 0; |
1190 | #else | |
1191 | { | |
1192 | int kl; | |
1193 | ||
1194 | kl = EVP_CIPHER_CTX_key_length(ctx); | |
1195 | if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0) | |
1196 | return 0; | |
1197 | return 1; | |
1198 | } | |
f844f9eb | 1199 | #endif /* FIPS_MODULE */ |
0f113f3e | 1200 | } |
216659eb | 1201 | |
c2bf7208 | 1202 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1203 | { |
1204 | if ((in == NULL) || (in->cipher == NULL)) { | |
1205 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
1206 | return 0; | |
1207 | } | |
df05f2ce MC |
1208 | |
1209 | if (in->cipher->prov == NULL) | |
1210 | goto legacy; | |
1211 | ||
1212 | if (in->cipher->dupctx == NULL) { | |
1213 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1214 | return 0; | |
1215 | } | |
1216 | ||
1217 | EVP_CIPHER_CTX_reset(out); | |
1218 | ||
1219 | *out = *in; | |
1220 | out->provctx = NULL; | |
1221 | ||
70c35fd1 | 1222 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1223 | out->fetched_cipher = NULL; |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | out->provctx = in->cipher->dupctx(in->provctx); | |
1228 | if (out->provctx == NULL) { | |
1229 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | return 1; | |
1234 | ||
1235 | /* TODO(3.0): Remove legacy code below */ | |
1236 | legacy: | |
1237 | ||
f844f9eb | 1238 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
1239 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1240 | if (in->engine && !ENGINE_init(in->engine)) { | |
1241 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
1242 | return 0; | |
1243 | } | |
c2bf7208 DSH |
1244 | #endif |
1245 | ||
c0ca39bd | 1246 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1247 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1248 | |
1249 | if (in->cipher_data && in->cipher->ctx_size) { | |
1250 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1251 | if (out->cipher_data == NULL) { |
273a0218 | 1252 | out->cipher = NULL; |
0f113f3e MC |
1253 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); |
1254 | return 0; | |
1255 | } | |
1256 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1257 | } | |
1258 | ||
1259 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1260 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1261 | out->cipher = NULL; | |
1262 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
1263 | return 0; | |
1264 | } | |
0f113f3e MC |
1265 | return 1; |
1266 | } | |
df05f2ce | 1267 | |
550f974a RL |
1268 | EVP_CIPHER *evp_cipher_new(void) |
1269 | { | |
1270 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1271 | ||
1272 | if (cipher != NULL) { | |
1273 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1274 | if (cipher->lock == NULL) { | |
1275 | OPENSSL_free(cipher); | |
1276 | return NULL; | |
1277 | } | |
1278 | cipher->refcnt = 1; | |
1279 | } | |
1280 | return cipher; | |
1281 | } | |
1282 | ||
32040838 RL |
1283 | /* |
1284 | * FIPS module note: since internal fetches will be entirely | |
1285 | * provider based, we know that none of its code depends on legacy | |
1286 | * NIDs or any functionality that use them. | |
1287 | */ | |
f844f9eb | 1288 | #ifndef FIPS_MODULE |
32040838 RL |
1289 | /* TODO(3.x) get rid of the need for legacy NIDs */ |
1290 | static void set_legacy_nid(const char *name, void *vlegacy_nid) | |
1291 | { | |
1292 | int nid; | |
1293 | int *legacy_nid = vlegacy_nid; | |
6a835fcf RL |
1294 | /* |
1295 | * We use lowest level function to get the associated method, because | |
1296 | * higher level functions such as EVP_get_cipherbyname() have changed | |
1297 | * to look at providers too. | |
1298 | */ | |
1299 | const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH); | |
32040838 RL |
1300 | |
1301 | if (*legacy_nid == -1) /* We found a clash already */ | |
1302 | return; | |
6a835fcf | 1303 | if (legacy_method == NULL) |
32040838 | 1304 | return; |
6a835fcf | 1305 | nid = EVP_CIPHER_nid(legacy_method); |
32040838 RL |
1306 | if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
1307 | *legacy_nid = -1; | |
1308 | return; | |
1309 | } | |
1310 | *legacy_nid = nid; | |
1311 | } | |
1312 | #endif | |
1313 | ||
f7c16d48 | 1314 | static void *evp_cipher_from_dispatch(const int name_id, |
6b9e3724 | 1315 | const OSSL_DISPATCH *fns, |
0ddf74bf | 1316 | OSSL_PROVIDER *prov) |
df05f2ce MC |
1317 | { |
1318 | EVP_CIPHER *cipher = NULL; | |
1319 | int fnciphcnt = 0, fnctxcnt = 0; | |
1320 | ||
f7c16d48 | 1321 | if ((cipher = evp_cipher_new()) == NULL) { |
6b9e3724 | 1322 | EVPerr(0, ERR_R_MALLOC_FAILURE); |
df05f2ce | 1323 | return NULL; |
6b9e3724 | 1324 | } |
df05f2ce | 1325 | |
f844f9eb | 1326 | #ifndef FIPS_MODULE |
32040838 RL |
1327 | /* TODO(3.x) get rid of the need for legacy NIDs */ |
1328 | cipher->nid = NID_undef; | |
f651c727 | 1329 | evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid); |
32040838 RL |
1330 | if (cipher->nid == -1) { |
1331 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); | |
1332 | EVP_CIPHER_free(cipher); | |
1333 | return NULL; | |
f7c16d48 | 1334 | } |
ed71e917 MC |
1335 | #endif |
1336 | ||
32040838 RL |
1337 | cipher->name_id = name_id; |
1338 | ||
df05f2ce MC |
1339 | for (; fns->function_id != 0; fns++) { |
1340 | switch (fns->function_id) { | |
1341 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1342 | if (cipher->newctx != NULL) | |
1343 | break; | |
363b1e5d | 1344 | cipher->newctx = OSSL_FUNC_cipher_newctx(fns); |
df05f2ce MC |
1345 | fnctxcnt++; |
1346 | break; | |
1347 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1348 | if (cipher->einit != NULL) | |
1349 | break; | |
363b1e5d | 1350 | cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns); |
df05f2ce MC |
1351 | fnciphcnt++; |
1352 | break; | |
1353 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1354 | if (cipher->dinit != NULL) | |
1355 | break; | |
363b1e5d | 1356 | cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns); |
df05f2ce MC |
1357 | fnciphcnt++; |
1358 | break; | |
1359 | case OSSL_FUNC_CIPHER_UPDATE: | |
1360 | if (cipher->cupdate != NULL) | |
1361 | break; | |
363b1e5d | 1362 | cipher->cupdate = OSSL_FUNC_cipher_update(fns); |
df05f2ce MC |
1363 | fnciphcnt++; |
1364 | break; | |
1365 | case OSSL_FUNC_CIPHER_FINAL: | |
1366 | if (cipher->cfinal != NULL) | |
1367 | break; | |
363b1e5d | 1368 | cipher->cfinal = OSSL_FUNC_cipher_final(fns); |
df05f2ce MC |
1369 | fnciphcnt++; |
1370 | break; | |
718b133a MC |
1371 | case OSSL_FUNC_CIPHER_CIPHER: |
1372 | if (cipher->ccipher != NULL) | |
1373 | break; | |
363b1e5d | 1374 | cipher->ccipher = OSSL_FUNC_cipher_cipher(fns); |
718b133a | 1375 | break; |
df05f2ce MC |
1376 | case OSSL_FUNC_CIPHER_FREECTX: |
1377 | if (cipher->freectx != NULL) | |
1378 | break; | |
363b1e5d | 1379 | cipher->freectx = OSSL_FUNC_cipher_freectx(fns); |
df05f2ce MC |
1380 | fnctxcnt++; |
1381 | break; | |
1382 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1383 | if (cipher->dupctx != NULL) | |
1384 | break; | |
363b1e5d | 1385 | cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns); |
df05f2ce | 1386 | break; |
df05f2ce MC |
1387 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1388 | if (cipher->get_params != NULL) | |
1389 | break; | |
363b1e5d | 1390 | cipher->get_params = OSSL_FUNC_cipher_get_params(fns); |
df05f2ce | 1391 | break; |
92d9d0ae RL |
1392 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
1393 | if (cipher->get_ctx_params != NULL) | |
718b133a | 1394 | break; |
363b1e5d | 1395 | cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns); |
718b133a | 1396 | break; |
92d9d0ae RL |
1397 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
1398 | if (cipher->set_ctx_params != NULL) | |
df05f2ce | 1399 | break; |
363b1e5d | 1400 | cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns); |
df05f2ce | 1401 | break; |
ae3ff60e RL |
1402 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
1403 | if (cipher->gettable_params != NULL) | |
1404 | break; | |
363b1e5d | 1405 | cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns); |
ae3ff60e RL |
1406 | break; |
1407 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1408 | if (cipher->gettable_ctx_params != NULL) | |
1409 | break; | |
1410 | cipher->gettable_ctx_params = | |
363b1e5d | 1411 | OSSL_FUNC_cipher_gettable_ctx_params(fns); |
ae3ff60e RL |
1412 | break; |
1413 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1414 | if (cipher->settable_ctx_params != NULL) | |
1415 | break; | |
1416 | cipher->settable_ctx_params = | |
363b1e5d | 1417 | OSSL_FUNC_cipher_settable_ctx_params(fns); |
ae3ff60e | 1418 | break; |
df05f2ce MC |
1419 | } |
1420 | } | |
718b133a MC |
1421 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1422 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1423 | || fnctxcnt != 2) { |
df05f2ce MC |
1424 | /* |
1425 | * In order to be a consistent set of functions we must have at least | |
1426 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1427 | * functions, or a single "cipher" function. In all cases we need both |
1428 | * the "newctx" and "freectx" functions. | |
df05f2ce | 1429 | */ |
550f974a | 1430 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1431 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
1432 | return NULL; | |
1433 | } | |
1434 | cipher->prov = prov; | |
1435 | if (prov != NULL) | |
7c95390e | 1436 | ossl_provider_up_ref(prov); |
df05f2ce MC |
1437 | |
1438 | return cipher; | |
1439 | } | |
1440 | ||
70c35fd1 | 1441 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1442 | { |
70c35fd1 | 1443 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1444 | } |
1445 | ||
1446 | static void evp_cipher_free(void *cipher) | |
1447 | { | |
550f974a | 1448 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1449 | } |
1450 | ||
df05f2ce MC |
1451 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, |
1452 | const char *properties) | |
1453 | { | |
0211740f RL |
1454 | EVP_CIPHER *cipher = |
1455 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
0ddf74bf | 1456 | evp_cipher_from_dispatch, evp_cipher_up_ref, |
0211740f RL |
1457 | evp_cipher_free); |
1458 | ||
3c957bcd SL |
1459 | if (cipher != NULL && !evp_cipher_cache_constants(cipher)) { |
1460 | EVP_CIPHER_free(cipher); | |
1461 | cipher = NULL; | |
1462 | } | |
0211740f | 1463 | return cipher; |
df05f2ce | 1464 | } |
c540f00f | 1465 | |
550f974a RL |
1466 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
1467 | { | |
1468 | int ref = 0; | |
1469 | ||
1470 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
1471 | return 1; | |
1472 | } | |
1473 | ||
1474 | void EVP_CIPHER_free(EVP_CIPHER *cipher) | |
1475 | { | |
1476 | int i; | |
1477 | ||
1478 | if (cipher == NULL) | |
1479 | return; | |
1480 | ||
1481 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1482 | if (i > 0) | |
1483 | return; | |
1484 | ossl_provider_free(cipher->prov); | |
550f974a RL |
1485 | CRYPTO_THREAD_lock_free(cipher->lock); |
1486 | OPENSSL_free(cipher); | |
1487 | } | |
1488 | ||
251e610c RL |
1489 | void EVP_CIPHER_do_all_provided(OPENSSL_CTX *libctx, |
1490 | void (*fn)(EVP_CIPHER *mac, void *arg), | |
1491 | void *arg) | |
c540f00f RL |
1492 | { |
1493 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1494 | (void (*)(void *, void *))fn, arg, | |
0ddf74bf | 1495 | evp_cipher_from_dispatch, evp_cipher_free); |
c540f00f | 1496 | } |