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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 | ||
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> | |
25f2138b | 20 | #include "crypto/evp.h" |
df05f2ce | 21 | #include "internal/provider.h" |
706457b7 | 22 | #include "evp_local.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) | |
550f974a | 38 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
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); |
f844f9eb | 54 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
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 | { | |
f844f9eb | 84 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 85 | ENGINE *tmpimpl = NULL; |
319e518a | 86 | #endif |
df05f2ce MC |
87 | /* |
88 | * enc == 1 means we are encrypting. | |
89 | * enc == 0 means we are decrypting. | |
90 | * enc == -1 means, use the previously initialised value for encrypt/decrypt | |
91 | */ | |
92 | if (enc == -1) { | |
0f113f3e | 93 | enc = ctx->encrypt; |
df05f2ce | 94 | } else { |
0f113f3e MC |
95 | if (enc) |
96 | enc = 1; | |
97 | ctx->encrypt = enc; | |
98 | } | |
df05f2ce MC |
99 | |
100 | if (cipher == NULL && ctx->cipher == NULL) { | |
101 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | /* TODO(3.0): Legacy work around code below. Remove this */ | |
106 | ||
f844f9eb | 107 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
108 | /* |
109 | * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so | |
110 | * this context may already have an ENGINE! Try to avoid releasing the | |
111 | * previous handle, re-querying for an ENGINE, and having a | |
0d4fb843 | 112 | * reinitialisation, when it may all be unnecessary. |
0f113f3e | 113 | */ |
f6b94279 | 114 | if (ctx->engine && ctx->cipher |
a7f9e0a4 | 115 | && (cipher == NULL || cipher->nid == ctx->cipher->nid)) |
0f113f3e | 116 | goto skip_to_init; |
df05f2ce MC |
117 | |
118 | if (cipher != NULL && impl == NULL) { | |
119 | /* Ask if an ENGINE is reserved for this job */ | |
120 | tmpimpl = ENGINE_get_cipher_engine(cipher->nid); | |
121 | } | |
0b13e9f0 | 122 | #endif |
df05f2ce MC |
123 | |
124 | /* | |
125 | * If there are engines involved then we should use legacy handling for now. | |
126 | */ | |
127 | if (ctx->engine != NULL | |
f844f9eb | 128 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
319e518a MC |
129 | || tmpimpl != NULL |
130 | #endif | |
131 | || impl != NULL) { | |
df05f2ce MC |
132 | if (ctx->cipher == ctx->fetched_cipher) |
133 | ctx->cipher = NULL; | |
550f974a | 134 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce MC |
135 | ctx->fetched_cipher = NULL; |
136 | goto legacy; | |
137 | } | |
df05f2ce MC |
138 | /* |
139 | * Ensure a context left lying around from last time is cleared | |
140 | * (legacy code) | |
141 | */ | |
142 | if (cipher != NULL && ctx->cipher != NULL) { | |
143 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
144 | ctx->cipher_data = NULL; | |
145 | } | |
146 | ||
147 | ||
148 | /* TODO(3.0): Start of non-legacy code below */ | |
149 | ||
150 | /* Ensure a context left lying around from last time is cleared */ | |
151 | if (cipher != NULL && ctx->cipher != NULL) { | |
152 | unsigned long flags = ctx->flags; | |
153 | ||
154 | EVP_CIPHER_CTX_reset(ctx); | |
155 | /* Restore encrypt and flags */ | |
156 | ctx->encrypt = enc; | |
157 | ctx->flags = flags; | |
158 | } | |
159 | ||
7f612b1f | 160 | if (cipher == NULL) |
df05f2ce MC |
161 | cipher = ctx->cipher; |
162 | ||
163 | if (cipher->prov == NULL) { | |
f844f9eb | 164 | #ifdef FIPS_MODULE |
79c44b4e | 165 | /* We only do explicit fetches inside the FIPS module */ |
319e518a MC |
166 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
167 | return 0; | |
168 | #else | |
169 | EVP_CIPHER *provciph = | |
068489a2 MC |
170 | EVP_CIPHER_fetch(NULL, |
171 | cipher->nid == NID_undef ? "NULL" | |
172 | : OBJ_nid2sn(cipher->nid), | |
173 | ""); | |
319e518a | 174 | |
df05f2ce MC |
175 | if (provciph == NULL) { |
176 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
177 | return 0; | |
178 | } | |
179 | cipher = provciph; | |
550f974a | 180 | EVP_CIPHER_free(ctx->fetched_cipher); |
df05f2ce | 181 | ctx->fetched_cipher = provciph; |
319e518a | 182 | #endif |
df05f2ce MC |
183 | } |
184 | ||
185 | ctx->cipher = cipher; | |
186 | if (ctx->provctx == NULL) { | |
a39eb840 | 187 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
df05f2ce MC |
188 | if (ctx->provctx == NULL) { |
189 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
190 | return 0; | |
191 | } | |
192 | } | |
193 | ||
194 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 195 | /* |
df05f2ce MC |
196 | * If this ctx was already set up for no padding then we need to tell |
197 | * the new cipher about it. | |
198 | */ | |
199 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
200 | return 0; | |
201 | } | |
202 | ||
203 | if (enc) { | |
204 | if (ctx->cipher->einit == NULL) { | |
205 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
206 | return 0; | |
207 | } | |
208 | ||
344cfa34 MC |
209 | return ctx->cipher->einit(ctx->provctx, |
210 | key, | |
33b40a10 MC |
211 | key == NULL ? 0 |
212 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 213 | iv, |
33b40a10 MC |
214 | iv == NULL ? 0 |
215 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
216 | } |
217 | ||
218 | if (ctx->cipher->dinit == NULL) { | |
219 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
220 | return 0; | |
221 | } | |
222 | ||
344cfa34 MC |
223 | return ctx->cipher->dinit(ctx->provctx, |
224 | key, | |
33b40a10 MC |
225 | key == NULL ? 0 |
226 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 227 | iv, |
33b40a10 MC |
228 | iv == NULL ? 0 |
229 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
230 | |
231 | /* TODO(3.0): Remove legacy code below */ | |
232 | legacy: | |
233 | ||
234 | if (cipher != NULL) { | |
235 | /* | |
236 | * Ensure a context left lying around from last time is cleared (we | |
237 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
238 | * EVP_CIPHER could be used). |
239 | */ | |
240 | if (ctx->cipher) { | |
241 | unsigned long flags = ctx->flags; | |
c0ca39bd | 242 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
243 | /* Restore encrypt and flags */ |
244 | ctx->encrypt = enc; | |
245 | ctx->flags = flags; | |
246 | } | |
f844f9eb | 247 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
df05f2ce | 248 | if (impl != NULL) { |
0f113f3e MC |
249 | if (!ENGINE_init(impl)) { |
250 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
251 | return 0; | |
252 | } | |
df05f2ce MC |
253 | } else { |
254 | impl = tmpimpl; | |
255 | } | |
256 | if (impl != NULL) { | |
0f113f3e MC |
257 | /* There's an ENGINE for this job ... (apparently) */ |
258 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
259 | |
260 | if (c == NULL) { | |
0f113f3e MC |
261 | /* |
262 | * One positive side-effect of US's export control history, | |
263 | * is that we should at least be able to avoid using US | |
0d4fb843 | 264 | * misspellings of "initialisation"? |
0f113f3e MC |
265 | */ |
266 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
267 | return 0; | |
268 | } | |
269 | /* We'll use the ENGINE's private cipher definition */ | |
270 | cipher = c; | |
271 | /* | |
272 | * Store the ENGINE functional reference so we know 'cipher' came | |
273 | * from an ENGINE and we need to release it when done. | |
274 | */ | |
275 | ctx->engine = impl; | |
df05f2ce | 276 | } else { |
0f113f3e | 277 | ctx->engine = NULL; |
df05f2ce | 278 | } |
0b13e9f0 | 279 | #endif |
544a2aea | 280 | |
0f113f3e MC |
281 | ctx->cipher = cipher; |
282 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 283 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 284 | if (ctx->cipher_data == NULL) { |
273a0218 | 285 | ctx->cipher = NULL; |
0f113f3e MC |
286 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); |
287 | return 0; | |
288 | } | |
289 | } else { | |
290 | ctx->cipher_data = NULL; | |
291 | } | |
292 | ctx->key_len = cipher->key_len; | |
293 | /* Preserve wrap enable flag, zero everything else */ | |
294 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
295 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
296 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 297 | ctx->cipher = NULL; |
0f113f3e MC |
298 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
299 | return 0; | |
300 | } | |
301 | } | |
0f113f3e | 302 | } |
f844f9eb | 303 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e | 304 | skip_to_init: |
0b13e9f0 | 305 | #endif |
1702c500 P |
306 | if (ctx->cipher == NULL) |
307 | return 0; | |
308 | ||
0f113f3e MC |
309 | /* we assume block size is a power of 2 in *cryptUpdate */ |
310 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
311 | || ctx->cipher->block_size == 8 | |
312 | || ctx->cipher->block_size == 16); | |
313 | ||
314 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
315 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
316 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
317 | return 0; | |
318 | } | |
319 | ||
480d3323 | 320 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
321 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
322 | ||
323 | case EVP_CIPH_STREAM_CIPHER: | |
324 | case EVP_CIPH_ECB_MODE: | |
325 | break; | |
326 | ||
327 | case EVP_CIPH_CFB_MODE: | |
328 | case EVP_CIPH_OFB_MODE: | |
329 | ||
330 | ctx->num = 0; | |
331 | /* fall-through */ | |
332 | ||
333 | case EVP_CIPH_CBC_MODE: | |
334 | ||
335 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
336 | (int)sizeof(ctx->iv)); | |
337 | if (iv) | |
338 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
339 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
340 | break; | |
341 | ||
342 | case EVP_CIPH_CTR_MODE: | |
343 | ctx->num = 0; | |
344 | /* Don't reuse IV for CTR mode */ | |
345 | if (iv) | |
346 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
347 | break; | |
348 | ||
349 | default: | |
350 | return 0; | |
0f113f3e MC |
351 | } |
352 | } | |
353 | ||
354 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
355 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
356 | return 0; | |
357 | } | |
358 | ctx->buf_len = 0; | |
359 | ctx->final_used = 0; | |
360 | ctx->block_mask = ctx->cipher->block_size - 1; | |
361 | return 1; | |
362 | } | |
d02b48c6 | 363 | |
be06a934 | 364 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
365 | const unsigned char *in, int inl) |
366 | { | |
367 | if (ctx->encrypt) | |
368 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
369 | else | |
370 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
371 | } | |
d02b48c6 | 372 | |
581f1c84 | 373 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
374 | { |
375 | if (ctx->encrypt) | |
376 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
377 | else | |
378 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
379 | } | |
581f1c84 | 380 | |
6b691a5c | 381 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
382 | { |
383 | if (ctx->encrypt) | |
384 | return EVP_EncryptFinal(ctx, out, outl); | |
385 | else | |
386 | return EVP_DecryptFinal(ctx, out, outl); | |
387 | } | |
d02b48c6 | 388 | |
be06a934 | 389 | int EVP_EncryptInit(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, 1); | |
393 | } | |
18eda732 | 394 | |
0f113f3e MC |
395 | int EVP_EncryptInit_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, 1); | |
400 | } | |
d02b48c6 | 401 | |
be06a934 | 402 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
403 | const unsigned char *key, const unsigned char *iv) |
404 | { | |
405 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
406 | } | |
18eda732 | 407 | |
0f113f3e MC |
408 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
409 | ENGINE *impl, const unsigned char *key, | |
410 | const unsigned char *iv) | |
411 | { | |
412 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
413 | } | |
d02b48c6 | 414 | |
c3a73daf AP |
415 | /* |
416 | * According to the letter of standard difference between pointers | |
417 | * is specified to be valid only within same object. This makes | |
418 | * it formally challenging to determine if input and output buffers | |
419 | * are not partially overlapping with standard pointer arithmetic. | |
420 | */ | |
421 | #ifdef PTRDIFF_T | |
422 | # undef PTRDIFF_T | |
423 | #endif | |
424 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
425 | /* | |
426 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
427 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
428 | * difference between two pointers might be truncated to 32 bits. | |
429 | * In the context one can even wonder how comparison for | |
430 | * equality is implemented. To be on the safe side we adhere to | |
431 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
432 | */ |
433 | # define PTRDIFF_T uint64_t | |
434 | #else | |
435 | # define PTRDIFF_T size_t | |
436 | #endif | |
437 | ||
7141ba31 | 438 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
439 | { |
440 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
441 | /* | |
442 | * Check for partially overlapping buffers. [Binary logical | |
443 | * operations are used instead of boolean to minimize number | |
444 | * of conditional branches.] | |
445 | */ | |
83151b73 AP |
446 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
447 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 448 | |
83151b73 | 449 | return overlapped; |
c3a73daf AP |
450 | } |
451 | ||
a8bf2f8f RL |
452 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
453 | unsigned char *out, int *outl, | |
454 | const unsigned char *in, int inl) | |
0f113f3e | 455 | { |
64846096 LP |
456 | int i, j, bl, cmpl = inl; |
457 | ||
458 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
459 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 460 | |
7141ba31 MC |
461 | bl = ctx->cipher->block_size; |
462 | ||
0f113f3e | 463 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 464 | /* If block size > 1 then the cipher will have to do this check */ |
64846096 | 465 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { |
a8bf2f8f | 466 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 467 | return 0; |
83151b73 | 468 | } |
5fc77684 | 469 | |
0f113f3e MC |
470 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
471 | if (i < 0) | |
472 | return 0; | |
473 | else | |
474 | *outl = i; | |
475 | return 1; | |
476 | } | |
477 | ||
2c236894 MC |
478 | if (inl <= 0) { |
479 | *outl = 0; | |
480 | return inl == 0; | |
481 | } | |
64846096 | 482 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
a8bf2f8f | 483 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 484 | return 0; |
83151b73 | 485 | } |
0f113f3e MC |
486 | |
487 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
488 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
489 | *outl = inl; | |
490 | return 1; | |
491 | } else { | |
492 | *outl = 0; | |
493 | return 0; | |
494 | } | |
495 | } | |
496 | i = ctx->buf_len; | |
0f113f3e MC |
497 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
498 | if (i != 0) { | |
3f358213 | 499 | if (bl - i > inl) { |
0f113f3e MC |
500 | memcpy(&(ctx->buf[i]), in, inl); |
501 | ctx->buf_len += inl; | |
502 | *outl = 0; | |
503 | return 1; | |
504 | } else { | |
505 | j = bl - i; | |
506 | memcpy(&(ctx->buf[i]), in, j); | |
0f113f3e MC |
507 | inl -= j; |
508 | in += j; | |
5fc77684 AP |
509 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
510 | return 0; | |
0f113f3e MC |
511 | out += bl; |
512 | *outl = bl; | |
513 | } | |
514 | } else | |
515 | *outl = 0; | |
516 | i = inl & (bl - 1); | |
517 | inl -= i; | |
518 | if (inl > 0) { | |
519 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
520 | return 0; | |
521 | *outl += inl; | |
522 | } | |
523 | ||
524 | if (i != 0) | |
525 | memcpy(ctx->buf, &(in[inl]), i); | |
526 | ctx->buf_len = i; | |
527 | return 1; | |
528 | } | |
d02b48c6 | 529 | |
a8bf2f8f RL |
530 | |
531 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
532 | const unsigned char *in, int inl) | |
533 | { | |
df05f2ce MC |
534 | int ret; |
535 | size_t soutl; | |
3b94944c | 536 | int blocksize; |
df05f2ce | 537 | |
a8bf2f8f RL |
538 | /* Prevent accidental use of decryption context when encrypting */ |
539 | if (!ctx->encrypt) { | |
540 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
541 | return 0; | |
542 | } | |
543 | ||
d4d89a07 SS |
544 | if (ctx->cipher == NULL) { |
545 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
546 | return 0; | |
547 | } | |
548 | ||
549 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
550 | goto legacy; |
551 | ||
3b94944c MC |
552 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
553 | ||
554 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
555 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); |
556 | return 0; | |
557 | } | |
3b94944c MC |
558 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
559 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
560 | (size_t)inl); | |
df05f2ce | 561 | |
36e619d7 GV |
562 | if (ret) { |
563 | if (soutl > INT_MAX) { | |
564 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
565 | return 0; | |
566 | } | |
567 | *outl = soutl; | |
df05f2ce | 568 | } |
36e619d7 | 569 | |
df05f2ce MC |
570 | return ret; |
571 | ||
572 | /* TODO(3.0): Remove legacy code below */ | |
573 | legacy: | |
574 | ||
a8bf2f8f RL |
575 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
576 | } | |
577 | ||
be06a934 | 578 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
579 | { |
580 | int ret; | |
581 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
582 | return ret; | |
583 | } | |
581f1c84 DSH |
584 | |
585 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
586 | { |
587 | int n, ret; | |
588 | unsigned int i, b, bl; | |
df05f2ce | 589 | size_t soutl; |
3b94944c | 590 | int blocksize; |
0f113f3e | 591 | |
a8bf2f8f RL |
592 | /* Prevent accidental use of decryption context when encrypting */ |
593 | if (!ctx->encrypt) { | |
594 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
595 | return 0; | |
596 | } | |
597 | ||
4894dcad P |
598 | if (ctx->cipher == NULL) { |
599 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
600 | return 0; | |
601 | } | |
602 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
603 | goto legacy; |
604 | ||
3b94944c MC |
605 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
606 | ||
607 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
608 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
609 | return 0; | |
610 | } | |
611 | ||
3b94944c MC |
612 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
613 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce | 614 | |
36e619d7 GV |
615 | if (ret) { |
616 | if (soutl > INT_MAX) { | |
617 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
618 | return 0; | |
619 | } | |
620 | *outl = soutl; | |
df05f2ce | 621 | } |
df05f2ce MC |
622 | |
623 | return ret; | |
624 | ||
625 | /* TODO(3.0): Remove legacy code below */ | |
626 | legacy: | |
627 | ||
0f113f3e MC |
628 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
629 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
630 | if (ret < 0) | |
631 | return 0; | |
632 | else | |
633 | *outl = ret; | |
634 | return 1; | |
635 | } | |
636 | ||
637 | b = ctx->cipher->block_size; | |
cbe29648 | 638 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
639 | if (b == 1) { |
640 | *outl = 0; | |
641 | return 1; | |
642 | } | |
643 | bl = ctx->buf_len; | |
644 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
645 | if (bl) { | |
646 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
647 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
648 | return 0; | |
649 | } | |
650 | *outl = 0; | |
651 | return 1; | |
652 | } | |
653 | ||
654 | n = b - bl; | |
655 | for (i = bl; i < b; i++) | |
656 | ctx->buf[i] = n; | |
657 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
658 | ||
659 | if (ret) | |
660 | *outl = b; | |
661 | ||
662 | return ret; | |
663 | } | |
d02b48c6 | 664 | |
be06a934 | 665 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
666 | const unsigned char *in, int inl) |
667 | { | |
df05f2ce | 668 | int fix_len, cmpl = inl, ret; |
0f113f3e | 669 | unsigned int b; |
df05f2ce | 670 | size_t soutl; |
3b94944c | 671 | int blocksize; |
0f113f3e | 672 | |
a8bf2f8f RL |
673 | /* Prevent accidental use of encryption context when decrypting */ |
674 | if (ctx->encrypt) { | |
675 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
676 | return 0; | |
677 | } | |
678 | ||
d2c2e49e P |
679 | if (ctx->cipher == NULL) { |
680 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
681 | return 0; | |
682 | } | |
683 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
684 | goto legacy; |
685 | ||
3b94944c MC |
686 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
687 | ||
688 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
689 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); |
690 | return 0; | |
691 | } | |
3b94944c MC |
692 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
693 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
694 | (size_t)inl); | |
df05f2ce MC |
695 | |
696 | if (ret) { | |
697 | if (soutl > INT_MAX) { | |
698 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
699 | return 0; | |
700 | } | |
701 | *outl = soutl; | |
702 | } | |
703 | ||
704 | return ret; | |
705 | ||
706 | /* TODO(3.0): Remove legacy code below */ | |
707 | legacy: | |
708 | ||
7141ba31 MC |
709 | b = ctx->cipher->block_size; |
710 | ||
64846096 LP |
711 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
712 | cmpl = (cmpl + 7) / 8; | |
713 | ||
0f113f3e | 714 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
64846096 | 715 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { |
83151b73 | 716 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 717 | return 0; |
83151b73 | 718 | } |
5fc77684 | 719 | |
0f113f3e MC |
720 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
721 | if (fix_len < 0) { | |
722 | *outl = 0; | |
723 | return 0; | |
724 | } else | |
725 | *outl = fix_len; | |
726 | return 1; | |
727 | } | |
728 | ||
2c236894 MC |
729 | if (inl <= 0) { |
730 | *outl = 0; | |
731 | return inl == 0; | |
732 | } | |
733 | ||
0f113f3e | 734 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 735 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 736 | |
cbe29648 | 737 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
738 | |
739 | if (ctx->final_used) { | |
5fc77684 AP |
740 | /* see comment about PTRDIFF_T comparison above */ |
741 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
83151b73 AP |
742 | || is_partially_overlapping(out, in, b)) { |
743 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
5fc77684 | 744 | return 0; |
83151b73 | 745 | } |
0f113f3e MC |
746 | memcpy(out, ctx->final, b); |
747 | out += b; | |
748 | fix_len = 1; | |
749 | } else | |
750 | fix_len = 0; | |
751 | ||
a8bf2f8f | 752 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
753 | return 0; |
754 | ||
755 | /* | |
756 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
757 | * copy of this last block | |
758 | */ | |
759 | if (b > 1 && !ctx->buf_len) { | |
760 | *outl -= b; | |
761 | ctx->final_used = 1; | |
762 | memcpy(ctx->final, &out[*outl], b); | |
763 | } else | |
764 | ctx->final_used = 0; | |
765 | ||
766 | if (fix_len) | |
767 | *outl += b; | |
768 | ||
769 | return 1; | |
770 | } | |
d02b48c6 | 771 | |
6b691a5c | 772 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
773 | { |
774 | int ret; | |
775 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
776 | return ret; | |
777 | } | |
581f1c84 DSH |
778 | |
779 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
780 | { |
781 | int i, n; | |
782 | unsigned int b; | |
df05f2ce MC |
783 | size_t soutl; |
784 | int ret; | |
3b94944c | 785 | int blocksize; |
a8bf2f8f RL |
786 | |
787 | /* Prevent accidental use of encryption context when decrypting */ | |
788 | if (ctx->encrypt) { | |
789 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
790 | return 0; | |
791 | } | |
792 | ||
d4d89a07 SS |
793 | if (ctx->cipher == NULL) { |
794 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
795 | return 0; | |
796 | } | |
797 | ||
798 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
799 | goto legacy; |
800 | ||
3b94944c MC |
801 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
802 | ||
803 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
804 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
805 | return 0; | |
806 | } | |
807 | ||
3b94944c MC |
808 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
809 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
810 | |
811 | if (ret) { | |
812 | if (soutl > INT_MAX) { | |
813 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
814 | return 0; | |
815 | } | |
816 | *outl = soutl; | |
817 | } | |
818 | ||
819 | return ret; | |
820 | ||
821 | /* TODO(3.0): Remove legacy code below */ | |
822 | legacy: | |
823 | ||
0f113f3e | 824 | *outl = 0; |
0f113f3e MC |
825 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
826 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
827 | if (i < 0) | |
828 | return 0; | |
829 | else | |
830 | *outl = i; | |
831 | return 1; | |
832 | } | |
833 | ||
834 | b = ctx->cipher->block_size; | |
835 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
836 | if (ctx->buf_len) { | |
837 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
838 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
839 | return 0; | |
840 | } | |
841 | *outl = 0; | |
842 | return 1; | |
843 | } | |
844 | if (b > 1) { | |
845 | if (ctx->buf_len || !ctx->final_used) { | |
846 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
26a7d938 | 847 | return 0; |
0f113f3e | 848 | } |
cbe29648 | 849 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
850 | |
851 | /* | |
852 | * The following assumes that the ciphertext has been authenticated. | |
853 | * Otherwise it provides a padding oracle. | |
854 | */ | |
855 | n = ctx->final[b - 1]; | |
856 | if (n == 0 || n > (int)b) { | |
857 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 858 | return 0; |
0f113f3e MC |
859 | } |
860 | for (i = 0; i < n; i++) { | |
861 | if (ctx->final[--b] != n) { | |
862 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 863 | return 0; |
0f113f3e MC |
864 | } |
865 | } | |
866 | n = ctx->cipher->block_size - n; | |
867 | for (i = 0; i < n; i++) | |
868 | out[i] = ctx->final[i]; | |
869 | *outl = n; | |
870 | } else | |
871 | *outl = 0; | |
208fb891 | 872 | return 1; |
0f113f3e | 873 | } |
d02b48c6 | 874 | |
6343829a | 875 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 876 | { |
d23adad1 MC |
877 | if (c->cipher->prov != NULL) { |
878 | int ok; | |
879 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
880 | size_t len = keylen; | |
459b15d4 | 881 | |
d23adad1 MC |
882 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
883 | return 1; | |
884 | ||
885 | /* Check the cipher actually understands this parameter */ | |
886 | if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher), | |
887 | OSSL_CIPHER_PARAM_KEYLEN) == NULL) | |
888 | return 0; | |
889 | ||
890 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); | |
891 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params); | |
13273237 | 892 | |
d23adad1 MC |
893 | return ok > 0 ? 1 : 0; |
894 | } | |
13273237 RL |
895 | |
896 | /* TODO(3.0) legacy code follows */ | |
d23adad1 MC |
897 | |
898 | /* | |
899 | * Note there have never been any built-in ciphers that define this flag | |
900 | * since it was first introduced. | |
901 | */ | |
0f113f3e MC |
902 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
903 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 904 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
905 | return 1; |
906 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
907 | c->key_len = keylen; | |
908 | return 1; | |
909 | } | |
910 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
911 | return 0; | |
912 | } | |
49528751 | 913 | |
f2e5ca84 | 914 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 915 | { |
13273237 | 916 | int ok; |
459b15d4 | 917 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
1c3ace68 | 918 | unsigned int pd = pad; |
13273237 | 919 | |
0f113f3e MC |
920 | if (pad) |
921 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
922 | else | |
923 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 924 | |
1c3ace68 | 925 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
459b15d4 SL |
926 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
927 | ||
13273237 | 928 | return ok != 0; |
0f113f3e | 929 | } |
f2e5ca84 | 930 | |
49528751 DSH |
931 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
932 | { | |
e870791a | 933 | int ret = EVP_CTRL_RET_UNSUPPORTED; |
459b15d4 | 934 | int set_params = 1; |
1c3ace68 | 935 | size_t sz = arg; |
6a41156c | 936 | unsigned int i; |
0d2bfe52 SL |
937 | OSSL_PARAM params[4] = { |
938 | OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END | |
939 | }; | |
d91f4568 | 940 | |
459b15d4 | 941 | if (ctx == NULL || ctx->cipher == NULL) { |
0f113f3e MC |
942 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); |
943 | return 0; | |
944 | } | |
945 | ||
13273237 RL |
946 | if (ctx->cipher->prov == NULL) |
947 | goto legacy; | |
948 | ||
949 | switch (type) { | |
950 | case EVP_CTRL_SET_KEY_LENGTH: | |
1c3ace68 | 951 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
13273237 RL |
952 | break; |
953 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
4a42e264 SL |
954 | set_params = 0; |
955 | params[0] = | |
956 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, | |
1c3ace68 | 957 | ptr, sz); |
4a42e264 SL |
958 | break; |
959 | ||
d6d74cf4 RL |
960 | case EVP_CTRL_INIT: |
961 | /* | |
962 | * TODO(3.0) EVP_CTRL_INIT is purely legacy, no provider counterpart | |
963 | * As a matter of fact, this should be dead code, but some caller | |
964 | * might still do a direct control call with this command, so... | |
965 | * Legacy methods return 1 except for exceptional circumstances, so | |
966 | * we do the same here to not be disruptive. | |
967 | */ | |
968 | return 1; | |
13273237 | 969 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
459b15d4 | 970 | default: |
6a36f209 | 971 | goto end; |
459b15d4 SL |
972 | case EVP_CTRL_GET_IV: |
973 | set_params = 0; | |
974 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, | |
1c3ace68 | 975 | ptr, sz); |
459b15d4 SL |
976 | break; |
977 | case EVP_CTRL_AEAD_SET_IVLEN: | |
978 | if (arg < 0) | |
979 | return 0; | |
1c3ace68 | 980 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
13273237 | 981 | break; |
11b44359 SL |
982 | case EVP_CTRL_AEAD_SET_IV_FIXED: |
983 | params[0] = OSSL_PARAM_construct_octet_string( | |
984 | OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz); | |
985 | break; | |
986 | case EVP_CTRL_GCM_IV_GEN: | |
987 | set_params = 0; | |
988 | if (arg < 0) | |
989 | sz = 0; /* special case that uses the iv length */ | |
990 | params[0] = OSSL_PARAM_construct_octet_string( | |
991 | OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz); | |
992 | break; | |
993 | case EVP_CTRL_GCM_SET_IV_INV: | |
994 | if (arg < 0) | |
995 | return 0; | |
996 | params[0] = OSSL_PARAM_construct_octet_string( | |
997 | OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz); | |
459b15d4 | 998 | break; |
6a41156c SL |
999 | case EVP_CTRL_GET_RC5_ROUNDS: |
1000 | set_params = 0; /* Fall thru */ | |
1001 | case EVP_CTRL_SET_RC5_ROUNDS: | |
1002 | if (arg < 0) | |
1003 | return 0; | |
1004 | i = (unsigned int)arg; | |
1005 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i); | |
1006 | break; | |
eb173822 SL |
1007 | case EVP_CTRL_SET_SPEED: |
1008 | if (arg < 0) | |
1009 | return 0; | |
1010 | i = (unsigned int)arg; | |
1011 | params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i); | |
1012 | break; | |
459b15d4 | 1013 | case EVP_CTRL_AEAD_GET_TAG: |
1c3ace68 SL |
1014 | set_params = 0; /* Fall thru */ |
1015 | case EVP_CTRL_AEAD_SET_TAG: | |
459b15d4 | 1016 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
1c3ace68 | 1017 | ptr, sz); |
459b15d4 SL |
1018 | break; |
1019 | case EVP_CTRL_AEAD_TLS1_AAD: | |
0d2bfe52 | 1020 | /* This one does a set and a get - since it returns a size */ |
459b15d4 SL |
1021 | params[0] = |
1022 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1c3ace68 | 1023 | ptr, sz); |
459b15d4 SL |
1024 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); |
1025 | if (ret <= 0) | |
6a36f209 | 1026 | goto end; |
459b15d4 SL |
1027 | params[0] = |
1028 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1029 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1030 | if (ret <= 0) | |
6a36f209 | 1031 | goto end; |
459b15d4 | 1032 | return sz; |
f816aa47 SL |
1033 | #ifndef OPENSSL_NO_RC2 |
1034 | case EVP_CTRL_GET_RC2_KEY_BITS: | |
1035 | set_params = 0; /* Fall thru */ | |
1036 | case EVP_CTRL_SET_RC2_KEY_BITS: | |
1037 | params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz); | |
1038 | break; | |
1039 | #endif /* OPENSSL_NO_RC2 */ | |
0d2bfe52 SL |
1040 | #if !defined(OPENSSL_NO_MULTIBLOCK) |
1041 | case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE: | |
1042 | params[0] = OSSL_PARAM_construct_size_t( | |
1043 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz); | |
1044 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1045 | if (ret <= 0) | |
1046 | return 0; | |
1047 | ||
1048 | params[0] = OSSL_PARAM_construct_size_t( | |
1049 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz); | |
1050 | params[1] = OSSL_PARAM_construct_end(); | |
1051 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1052 | if (ret <= 0) | |
1053 | return 0; | |
1054 | return sz; | |
1055 | case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: { | |
1056 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1057 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1058 | ||
1059 | if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) | |
1060 | return 0; | |
1061 | ||
1062 | params[0] = OSSL_PARAM_construct_octet_string( | |
1063 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len); | |
1064 | params[1] = OSSL_PARAM_construct_uint( | |
1065 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1066 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1067 | if (ret <= 0) | |
1068 | return ret; | |
1069 | /* Retrieve the return values changed by the set */ | |
1070 | params[0] = OSSL_PARAM_construct_size_t( | |
1071 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz); | |
1072 | params[1] = OSSL_PARAM_construct_uint( | |
1073 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1074 | params[2] = OSSL_PARAM_construct_end(); | |
1075 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1076 | if (ret <= 0) | |
1077 | return 0; | |
1078 | return sz; | |
1079 | } | |
1080 | case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: { | |
1081 | EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = | |
1082 | (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; | |
1083 | ||
1084 | params[0] = OSSL_PARAM_construct_octet_string( | |
1085 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len); | |
1086 | ||
1087 | params[1] = OSSL_PARAM_construct_octet_string( | |
1088 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp, | |
1089 | p->len); | |
1090 | params[2] = OSSL_PARAM_construct_uint( | |
1091 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); | |
1092 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1093 | if (ret <= 0) | |
1094 | return ret; | |
1095 | params[0] = OSSL_PARAM_construct_size_t( | |
1096 | OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz); | |
1097 | params[1] = OSSL_PARAM_construct_end(); | |
1098 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1099 | if (ret <= 0) | |
1100 | return 0; | |
1101 | return sz; | |
1102 | } | |
1103 | #endif /* OPENSSL_NO_MULTIBLOCK */ | |
1104 | case EVP_CTRL_AEAD_SET_MAC_KEY: | |
1105 | if (arg < 0) | |
1106 | return -1; | |
1107 | params[0] = OSSL_PARAM_construct_octet_string( | |
1108 | OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz); | |
1109 | break; | |
13273237 | 1110 | } |
459b15d4 SL |
1111 | |
1112 | if (set_params) | |
1113 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1114 | else | |
1115 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
6a36f209 | 1116 | goto end; |
13273237 | 1117 | |
459b15d4 SL |
1118 | /* TODO(3.0): Remove legacy code below */ |
1119 | legacy: | |
1120 | if (ctx->cipher->ctrl == NULL) { | |
0f113f3e MC |
1121 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
552be00d | 1126 | |
6a36f209 | 1127 | end: |
e870791a | 1128 | if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
0f113f3e MC |
1129 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, |
1130 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
1131 | return 0; | |
1132 | } | |
1133 | return ret; | |
49528751 | 1134 | } |
216659eb | 1135 | |
ae3ff60e RL |
1136 | int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
1137 | { | |
1138 | if (cipher != NULL && cipher->get_params != NULL) | |
1139 | return cipher->get_params(params); | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) | |
1144 | { | |
92d9d0ae RL |
1145 | if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) |
1146 | return ctx->cipher->set_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1147 | return 0; |
1148 | } | |
1149 | ||
1150 | int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) | |
1151 | { | |
92d9d0ae RL |
1152 | if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
1153 | return ctx->cipher->get_ctx_params(ctx->provctx, params); | |
ae3ff60e RL |
1154 | return 0; |
1155 | } | |
1156 | ||
1157 | const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) | |
1158 | { | |
1159 | if (cipher != NULL && cipher->gettable_params != NULL) | |
1160 | return cipher->gettable_params(); | |
1161 | return NULL; | |
1162 | } | |
1163 | ||
41f7ecf3 | 1164 | const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e RL |
1165 | { |
1166 | if (cipher != NULL && cipher->settable_ctx_params != NULL) | |
1167 | return cipher->settable_ctx_params(); | |
1168 | return NULL; | |
1169 | } | |
1170 | ||
41f7ecf3 | 1171 | const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher) |
ae3ff60e RL |
1172 | { |
1173 | if (cipher != NULL && cipher->gettable_ctx_params != NULL) | |
1174 | return cipher->gettable_ctx_params(); | |
1175 | return NULL; | |
1176 | } | |
1177 | ||
216659eb | 1178 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e MC |
1179 | { |
1180 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) | |
1181 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
4a42e264 | 1182 | |
f844f9eb | 1183 | #ifdef FIPS_MODULE |
4a42e264 SL |
1184 | return 0; |
1185 | #else | |
1186 | { | |
1187 | int kl; | |
1188 | ||
1189 | kl = EVP_CIPHER_CTX_key_length(ctx); | |
1190 | if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0) | |
1191 | return 0; | |
1192 | return 1; | |
1193 | } | |
f844f9eb | 1194 | #endif /* FIPS_MODULE */ |
0f113f3e | 1195 | } |
216659eb | 1196 | |
c2bf7208 | 1197 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1198 | { |
1199 | if ((in == NULL) || (in->cipher == NULL)) { | |
1200 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
1201 | return 0; | |
1202 | } | |
df05f2ce MC |
1203 | |
1204 | if (in->cipher->prov == NULL) | |
1205 | goto legacy; | |
1206 | ||
1207 | if (in->cipher->dupctx == NULL) { | |
1208 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1209 | return 0; | |
1210 | } | |
1211 | ||
1212 | EVP_CIPHER_CTX_reset(out); | |
1213 | ||
1214 | *out = *in; | |
1215 | out->provctx = NULL; | |
1216 | ||
70c35fd1 | 1217 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1218 | out->fetched_cipher = NULL; |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | out->provctx = in->cipher->dupctx(in->provctx); | |
1223 | if (out->provctx == NULL) { | |
1224 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | return 1; | |
1229 | ||
1230 | /* TODO(3.0): Remove legacy code below */ | |
1231 | legacy: | |
1232 | ||
f844f9eb | 1233 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
0f113f3e MC |
1234 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1235 | if (in->engine && !ENGINE_init(in->engine)) { | |
1236 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
1237 | return 0; | |
1238 | } | |
c2bf7208 DSH |
1239 | #endif |
1240 | ||
c0ca39bd | 1241 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1242 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1243 | |
1244 | if (in->cipher_data && in->cipher->ctx_size) { | |
1245 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1246 | if (out->cipher_data == NULL) { |
273a0218 | 1247 | out->cipher = NULL; |
0f113f3e MC |
1248 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); |
1249 | return 0; | |
1250 | } | |
1251 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1252 | } | |
1253 | ||
1254 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1255 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1256 | out->cipher = NULL; | |
1257 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
1258 | return 0; | |
1259 | } | |
0f113f3e MC |
1260 | return 1; |
1261 | } | |
df05f2ce | 1262 | |
550f974a RL |
1263 | EVP_CIPHER *evp_cipher_new(void) |
1264 | { | |
1265 | EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); | |
1266 | ||
1267 | if (cipher != NULL) { | |
1268 | cipher->lock = CRYPTO_THREAD_lock_new(); | |
1269 | if (cipher->lock == NULL) { | |
1270 | OPENSSL_free(cipher); | |
1271 | return NULL; | |
1272 | } | |
1273 | cipher->refcnt = 1; | |
1274 | } | |
1275 | return cipher; | |
1276 | } | |
1277 | ||
32040838 RL |
1278 | /* |
1279 | * FIPS module note: since internal fetches will be entirely | |
1280 | * provider based, we know that none of its code depends on legacy | |
1281 | * NIDs or any functionality that use them. | |
1282 | */ | |
f844f9eb | 1283 | #ifndef FIPS_MODULE |
32040838 RL |
1284 | /* TODO(3.x) get rid of the need for legacy NIDs */ |
1285 | static void set_legacy_nid(const char *name, void *vlegacy_nid) | |
1286 | { | |
1287 | int nid; | |
1288 | int *legacy_nid = vlegacy_nid; | |
6a835fcf RL |
1289 | /* |
1290 | * We use lowest level function to get the associated method, because | |
1291 | * higher level functions such as EVP_get_cipherbyname() have changed | |
1292 | * to look at providers too. | |
1293 | */ | |
1294 | const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH); | |
32040838 RL |
1295 | |
1296 | if (*legacy_nid == -1) /* We found a clash already */ | |
1297 | return; | |
6a835fcf | 1298 | if (legacy_method == NULL) |
32040838 | 1299 | return; |
6a835fcf | 1300 | nid = EVP_CIPHER_nid(legacy_method); |
32040838 RL |
1301 | if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
1302 | *legacy_nid = -1; | |
1303 | return; | |
1304 | } | |
1305 | *legacy_nid = nid; | |
1306 | } | |
1307 | #endif | |
1308 | ||
f7c16d48 | 1309 | static void *evp_cipher_from_dispatch(const int name_id, |
6b9e3724 | 1310 | const OSSL_DISPATCH *fns, |
0ddf74bf | 1311 | OSSL_PROVIDER *prov) |
df05f2ce MC |
1312 | { |
1313 | EVP_CIPHER *cipher = NULL; | |
1314 | int fnciphcnt = 0, fnctxcnt = 0; | |
1315 | ||
f7c16d48 | 1316 | if ((cipher = evp_cipher_new()) == NULL) { |
6b9e3724 | 1317 | EVPerr(0, ERR_R_MALLOC_FAILURE); |
df05f2ce | 1318 | return NULL; |
6b9e3724 | 1319 | } |
df05f2ce | 1320 | |
f844f9eb | 1321 | #ifndef FIPS_MODULE |
32040838 RL |
1322 | /* TODO(3.x) get rid of the need for legacy NIDs */ |
1323 | cipher->nid = NID_undef; | |
f651c727 | 1324 | evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid); |
32040838 RL |
1325 | if (cipher->nid == -1) { |
1326 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); | |
1327 | EVP_CIPHER_free(cipher); | |
1328 | return NULL; | |
f7c16d48 | 1329 | } |
ed71e917 MC |
1330 | #endif |
1331 | ||
32040838 RL |
1332 | cipher->name_id = name_id; |
1333 | ||
df05f2ce MC |
1334 | for (; fns->function_id != 0; fns++) { |
1335 | switch (fns->function_id) { | |
1336 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1337 | if (cipher->newctx != NULL) | |
1338 | break; | |
363b1e5d | 1339 | cipher->newctx = OSSL_FUNC_cipher_newctx(fns); |
df05f2ce MC |
1340 | fnctxcnt++; |
1341 | break; | |
1342 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1343 | if (cipher->einit != NULL) | |
1344 | break; | |
363b1e5d | 1345 | cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns); |
df05f2ce MC |
1346 | fnciphcnt++; |
1347 | break; | |
1348 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1349 | if (cipher->dinit != NULL) | |
1350 | break; | |
363b1e5d | 1351 | cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns); |
df05f2ce MC |
1352 | fnciphcnt++; |
1353 | break; | |
1354 | case OSSL_FUNC_CIPHER_UPDATE: | |
1355 | if (cipher->cupdate != NULL) | |
1356 | break; | |
363b1e5d | 1357 | cipher->cupdate = OSSL_FUNC_cipher_update(fns); |
df05f2ce MC |
1358 | fnciphcnt++; |
1359 | break; | |
1360 | case OSSL_FUNC_CIPHER_FINAL: | |
1361 | if (cipher->cfinal != NULL) | |
1362 | break; | |
363b1e5d | 1363 | cipher->cfinal = OSSL_FUNC_cipher_final(fns); |
df05f2ce MC |
1364 | fnciphcnt++; |
1365 | break; | |
718b133a MC |
1366 | case OSSL_FUNC_CIPHER_CIPHER: |
1367 | if (cipher->ccipher != NULL) | |
1368 | break; | |
363b1e5d | 1369 | cipher->ccipher = OSSL_FUNC_cipher_cipher(fns); |
718b133a | 1370 | break; |
df05f2ce MC |
1371 | case OSSL_FUNC_CIPHER_FREECTX: |
1372 | if (cipher->freectx != NULL) | |
1373 | break; | |
363b1e5d | 1374 | cipher->freectx = OSSL_FUNC_cipher_freectx(fns); |
df05f2ce MC |
1375 | fnctxcnt++; |
1376 | break; | |
1377 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1378 | if (cipher->dupctx != NULL) | |
1379 | break; | |
363b1e5d | 1380 | cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns); |
df05f2ce | 1381 | break; |
df05f2ce MC |
1382 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1383 | if (cipher->get_params != NULL) | |
1384 | break; | |
363b1e5d | 1385 | cipher->get_params = OSSL_FUNC_cipher_get_params(fns); |
df05f2ce | 1386 | break; |
92d9d0ae RL |
1387 | case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
1388 | if (cipher->get_ctx_params != NULL) | |
718b133a | 1389 | break; |
363b1e5d | 1390 | cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns); |
718b133a | 1391 | break; |
92d9d0ae RL |
1392 | case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
1393 | if (cipher->set_ctx_params != NULL) | |
df05f2ce | 1394 | break; |
363b1e5d | 1395 | cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns); |
df05f2ce | 1396 | break; |
ae3ff60e RL |
1397 | case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
1398 | if (cipher->gettable_params != NULL) | |
1399 | break; | |
363b1e5d | 1400 | cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns); |
ae3ff60e RL |
1401 | break; |
1402 | case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: | |
1403 | if (cipher->gettable_ctx_params != NULL) | |
1404 | break; | |
1405 | cipher->gettable_ctx_params = | |
363b1e5d | 1406 | OSSL_FUNC_cipher_gettable_ctx_params(fns); |
ae3ff60e RL |
1407 | break; |
1408 | case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: | |
1409 | if (cipher->settable_ctx_params != NULL) | |
1410 | break; | |
1411 | cipher->settable_ctx_params = | |
363b1e5d | 1412 | OSSL_FUNC_cipher_settable_ctx_params(fns); |
ae3ff60e | 1413 | break; |
df05f2ce MC |
1414 | } |
1415 | } | |
718b133a MC |
1416 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1417 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1418 | || fnctxcnt != 2) { |
df05f2ce MC |
1419 | /* |
1420 | * In order to be a consistent set of functions we must have at least | |
1421 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1422 | * functions, or a single "cipher" function. In all cases we need both |
1423 | * the "newctx" and "freectx" functions. | |
df05f2ce | 1424 | */ |
550f974a | 1425 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1426 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
1427 | return NULL; | |
1428 | } | |
1429 | cipher->prov = prov; | |
1430 | if (prov != NULL) | |
7c95390e | 1431 | ossl_provider_up_ref(prov); |
df05f2ce MC |
1432 | |
1433 | return cipher; | |
1434 | } | |
1435 | ||
70c35fd1 | 1436 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1437 | { |
70c35fd1 | 1438 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1439 | } |
1440 | ||
1441 | static void evp_cipher_free(void *cipher) | |
1442 | { | |
550f974a | 1443 | EVP_CIPHER_free(cipher); |
df05f2ce MC |
1444 | } |
1445 | ||
df05f2ce MC |
1446 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, |
1447 | const char *properties) | |
1448 | { | |
0211740f RL |
1449 | EVP_CIPHER *cipher = |
1450 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
0ddf74bf | 1451 | evp_cipher_from_dispatch, evp_cipher_up_ref, |
0211740f RL |
1452 | evp_cipher_free); |
1453 | ||
3c957bcd SL |
1454 | if (cipher != NULL && !evp_cipher_cache_constants(cipher)) { |
1455 | EVP_CIPHER_free(cipher); | |
1456 | cipher = NULL; | |
1457 | } | |
0211740f | 1458 | return cipher; |
df05f2ce | 1459 | } |
c540f00f | 1460 | |
550f974a RL |
1461 | int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
1462 | { | |
1463 | int ref = 0; | |
1464 | ||
1465 | CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); | |
1466 | return 1; | |
1467 | } | |
1468 | ||
1469 | void EVP_CIPHER_free(EVP_CIPHER *cipher) | |
1470 | { | |
1471 | int i; | |
1472 | ||
1473 | if (cipher == NULL) | |
1474 | return; | |
1475 | ||
1476 | CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); | |
1477 | if (i > 0) | |
1478 | return; | |
1479 | ossl_provider_free(cipher->prov); | |
550f974a RL |
1480 | CRYPTO_THREAD_lock_free(cipher->lock); |
1481 | OPENSSL_free(cipher); | |
1482 | } | |
1483 | ||
251e610c RL |
1484 | void EVP_CIPHER_do_all_provided(OPENSSL_CTX *libctx, |
1485 | void (*fn)(EVP_CIPHER *mac, void *arg), | |
1486 | void *arg) | |
c540f00f RL |
1487 | { |
1488 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1489 | (void (*)(void *, void *))fn, arg, | |
0ddf74bf | 1490 | evp_cipher_from_dispatch, evp_cipher_free); |
c540f00f | 1491 | } |