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Commit | Line | Data |
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62867571 | 1 | /* |
b0edda11 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
c3a73daf | 11 | #include <assert.h> |
b39fc560 | 12 | #include "internal/cryptlib.h" |
ec577822 | 13 | #include <openssl/evp.h> |
7f060601 | 14 | #include <openssl/err.h> |
3a87a9b9 | 15 | #include <openssl/rand.h> |
6decf943 | 16 | #include <openssl/rand_drbg.h> |
3c27208f | 17 | #include <openssl/engine.h> |
df05f2ce MC |
18 | #include <openssl/params.h> |
19 | #include <openssl/core_names.h> | |
135727ab | 20 | #include "internal/evp_int.h" |
df05f2ce | 21 | #include "internal/provider.h" |
57ae2e24 | 22 | #include "evp_locl.h" |
d02b48c6 | 23 | |
df05f2ce | 24 | int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) |
0f113f3e | 25 | { |
df05f2ce | 26 | if (ctx == NULL) |
8baf9968 | 27 | return 1; |
df05f2ce MC |
28 | |
29 | if (ctx->cipher == NULL || ctx->cipher->prov == NULL) | |
30 | goto legacy; | |
31 | ||
32 | if (ctx->provctx != NULL) { | |
33 | if (ctx->cipher->freectx != NULL) | |
34 | ctx->cipher->freectx(ctx->provctx); | |
35 | ctx->provctx = NULL; | |
36 | } | |
37 | if (ctx->fetched_cipher != NULL) | |
38 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
39 | memset(ctx, 0, sizeof(*ctx)); | |
40 | ||
41 | return 1; | |
42 | ||
43 | /* TODO(3.0): Remove legacy code below */ | |
44 | legacy: | |
45 | ||
46 | if (ctx->cipher != NULL) { | |
47 | if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) | |
8baf9968 RL |
48 | return 0; |
49 | /* Cleanse cipher context data */ | |
df05f2ce MC |
50 | if (ctx->cipher_data && ctx->cipher->ctx_size) |
51 | OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); | |
8baf9968 | 52 | } |
df05f2ce | 53 | OPENSSL_free(ctx->cipher_data); |
319e518a | 54 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
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 | { | |
319e518a | 84 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
df05f2ce | 85 | ENGINE *tmpimpl = NULL; |
319e518a | 86 | #endif |
df05f2ce MC |
87 | const EVP_CIPHER *tmpcipher; |
88 | ||
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 | ||
319e518a | 109 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
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 | |
319e518a MC |
130 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
131 | || tmpimpl != NULL | |
132 | #endif | |
133 | || impl != NULL) { | |
df05f2ce MC |
134 | if (ctx->cipher == ctx->fetched_cipher) |
135 | ctx->cipher = NULL; | |
136 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
137 | ctx->fetched_cipher = NULL; | |
138 | goto legacy; | |
139 | } | |
140 | ||
141 | tmpcipher = (cipher == NULL) ? ctx->cipher : cipher; | |
142 | ||
143 | if (tmpcipher->prov == NULL) { | |
144 | switch(tmpcipher->nid) { | |
aab26e6f | 145 | case NID_aes_256_ecb: |
f4a129bb MC |
146 | case NID_aes_192_ecb: |
147 | case NID_aes_128_ecb: | |
718b133a MC |
148 | case NID_aes_256_cbc: |
149 | case NID_aes_192_cbc: | |
150 | case NID_aes_128_cbc: | |
ed98df51 MC |
151 | case NID_aes_256_ofb128: |
152 | case NID_aes_192_ofb128: | |
153 | case NID_aes_128_ofb128: | |
75dd6d64 MC |
154 | case NID_aes_256_cfb128: |
155 | case NID_aes_192_cfb128: | |
156 | case NID_aes_128_cfb128: | |
157 | case NID_aes_256_cfb1: | |
158 | case NID_aes_192_cfb1: | |
159 | case NID_aes_128_cfb1: | |
160 | case NID_aes_256_cfb8: | |
161 | case NID_aes_192_cfb8: | |
162 | case NID_aes_128_cfb8: | |
819a7ae9 MC |
163 | case NID_aes_256_ctr: |
164 | case NID_aes_192_ctr: | |
165 | case NID_aes_128_ctr: | |
aab26e6f | 166 | break; |
df05f2ce MC |
167 | default: |
168 | goto legacy; | |
169 | } | |
170 | } | |
171 | ||
172 | /* | |
173 | * Ensure a context left lying around from last time is cleared | |
174 | * (legacy code) | |
175 | */ | |
176 | if (cipher != NULL && ctx->cipher != NULL) { | |
177 | OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); | |
178 | ctx->cipher_data = NULL; | |
179 | } | |
180 | ||
181 | ||
182 | /* TODO(3.0): Start of non-legacy code below */ | |
183 | ||
184 | /* Ensure a context left lying around from last time is cleared */ | |
185 | if (cipher != NULL && ctx->cipher != NULL) { | |
186 | unsigned long flags = ctx->flags; | |
187 | ||
188 | EVP_CIPHER_CTX_reset(ctx); | |
189 | /* Restore encrypt and flags */ | |
190 | ctx->encrypt = enc; | |
191 | ctx->flags = flags; | |
192 | } | |
193 | ||
194 | if (cipher != NULL) | |
195 | ctx->cipher = cipher; | |
196 | else | |
197 | cipher = ctx->cipher; | |
198 | ||
199 | if (cipher->prov == NULL) { | |
319e518a MC |
200 | #ifdef FIPS_MODE |
201 | /* We only do explict fetches inside the FIPS module */ | |
202 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
203 | return 0; | |
204 | #else | |
205 | EVP_CIPHER *provciph = | |
206 | EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), ""); | |
207 | ||
df05f2ce MC |
208 | if (provciph == NULL) { |
209 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
210 | return 0; | |
211 | } | |
212 | cipher = provciph; | |
213 | EVP_CIPHER_meth_free(ctx->fetched_cipher); | |
214 | ctx->fetched_cipher = provciph; | |
319e518a | 215 | #endif |
df05f2ce MC |
216 | } |
217 | ||
218 | ctx->cipher = cipher; | |
219 | if (ctx->provctx == NULL) { | |
a39eb840 | 220 | ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
df05f2ce MC |
221 | if (ctx->provctx == NULL) { |
222 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
223 | return 0; | |
224 | } | |
225 | } | |
226 | ||
227 | if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { | |
0f113f3e | 228 | /* |
df05f2ce MC |
229 | * If this ctx was already set up for no padding then we need to tell |
230 | * the new cipher about it. | |
231 | */ | |
232 | if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) | |
233 | return 0; | |
234 | } | |
235 | ||
718b133a MC |
236 | switch (EVP_CIPHER_mode(ctx->cipher)) { |
237 | case EVP_CIPH_CFB_MODE: | |
238 | case EVP_CIPH_OFB_MODE: | |
239 | case EVP_CIPH_CBC_MODE: | |
240 | /* For these modes we remember the original IV for later use */ | |
241 | if (!ossl_assert(EVP_CIPHER_CTX_iv_length(ctx) <= (int)sizeof(ctx->oiv))) { | |
242 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
243 | return 0; | |
244 | } | |
245 | if (iv != NULL) | |
246 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
247 | } | |
248 | ||
df05f2ce MC |
249 | if (enc) { |
250 | if (ctx->cipher->einit == NULL) { | |
251 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
252 | return 0; | |
253 | } | |
254 | ||
344cfa34 MC |
255 | return ctx->cipher->einit(ctx->provctx, |
256 | key, | |
33b40a10 MC |
257 | key == NULL ? 0 |
258 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 259 | iv, |
33b40a10 MC |
260 | iv == NULL ? 0 |
261 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
262 | } |
263 | ||
264 | if (ctx->cipher->dinit == NULL) { | |
265 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
266 | return 0; | |
267 | } | |
268 | ||
344cfa34 MC |
269 | return ctx->cipher->dinit(ctx->provctx, |
270 | key, | |
33b40a10 MC |
271 | key == NULL ? 0 |
272 | : EVP_CIPHER_CTX_key_length(ctx), | |
344cfa34 | 273 | iv, |
33b40a10 MC |
274 | iv == NULL ? 0 |
275 | : EVP_CIPHER_CTX_iv_length(ctx)); | |
df05f2ce MC |
276 | |
277 | /* TODO(3.0): Remove legacy code below */ | |
278 | legacy: | |
279 | ||
280 | if (cipher != NULL) { | |
281 | /* | |
282 | * Ensure a context left lying around from last time is cleared (we | |
283 | * previously attempted to avoid this if the same ENGINE and | |
0f113f3e MC |
284 | * EVP_CIPHER could be used). |
285 | */ | |
286 | if (ctx->cipher) { | |
287 | unsigned long flags = ctx->flags; | |
c0ca39bd | 288 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
289 | /* Restore encrypt and flags */ |
290 | ctx->encrypt = enc; | |
291 | ctx->flags = flags; | |
292 | } | |
319e518a | 293 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
df05f2ce | 294 | if (impl != NULL) { |
0f113f3e MC |
295 | if (!ENGINE_init(impl)) { |
296 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
297 | return 0; | |
298 | } | |
df05f2ce MC |
299 | } else { |
300 | impl = tmpimpl; | |
301 | } | |
302 | if (impl != NULL) { | |
0f113f3e MC |
303 | /* There's an ENGINE for this job ... (apparently) */ |
304 | const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); | |
df05f2ce MC |
305 | |
306 | if (c == NULL) { | |
0f113f3e MC |
307 | /* |
308 | * One positive side-effect of US's export control history, | |
309 | * is that we should at least be able to avoid using US | |
0d4fb843 | 310 | * misspellings of "initialisation"? |
0f113f3e MC |
311 | */ |
312 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); | |
313 | return 0; | |
314 | } | |
315 | /* We'll use the ENGINE's private cipher definition */ | |
316 | cipher = c; | |
317 | /* | |
318 | * Store the ENGINE functional reference so we know 'cipher' came | |
319 | * from an ENGINE and we need to release it when done. | |
320 | */ | |
321 | ctx->engine = impl; | |
df05f2ce | 322 | } else { |
0f113f3e | 323 | ctx->engine = NULL; |
df05f2ce | 324 | } |
0b13e9f0 | 325 | #endif |
544a2aea | 326 | |
0f113f3e MC |
327 | ctx->cipher = cipher; |
328 | if (ctx->cipher->ctx_size) { | |
b51bce94 | 329 | ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
90945fa3 | 330 | if (ctx->cipher_data == NULL) { |
273a0218 | 331 | ctx->cipher = NULL; |
0f113f3e MC |
332 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); |
333 | return 0; | |
334 | } | |
335 | } else { | |
336 | ctx->cipher_data = NULL; | |
337 | } | |
338 | ctx->key_len = cipher->key_len; | |
339 | /* Preserve wrap enable flag, zero everything else */ | |
340 | ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; | |
341 | if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { | |
342 | if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { | |
273a0218 | 343 | ctx->cipher = NULL; |
0f113f3e MC |
344 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); |
345 | return 0; | |
346 | } | |
347 | } | |
0f113f3e | 348 | } |
319e518a | 349 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e | 350 | skip_to_init: |
0b13e9f0 | 351 | #endif |
1702c500 P |
352 | if (ctx->cipher == NULL) |
353 | return 0; | |
354 | ||
0f113f3e MC |
355 | /* we assume block size is a power of 2 in *cryptUpdate */ |
356 | OPENSSL_assert(ctx->cipher->block_size == 1 | |
357 | || ctx->cipher->block_size == 8 | |
358 | || ctx->cipher->block_size == 16); | |
359 | ||
360 | if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) | |
361 | && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) { | |
362 | EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); | |
363 | return 0; | |
364 | } | |
365 | ||
480d3323 | 366 | if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { |
0f113f3e MC |
367 | switch (EVP_CIPHER_CTX_mode(ctx)) { |
368 | ||
369 | case EVP_CIPH_STREAM_CIPHER: | |
370 | case EVP_CIPH_ECB_MODE: | |
371 | break; | |
372 | ||
373 | case EVP_CIPH_CFB_MODE: | |
374 | case EVP_CIPH_OFB_MODE: | |
375 | ||
376 | ctx->num = 0; | |
377 | /* fall-through */ | |
378 | ||
379 | case EVP_CIPH_CBC_MODE: | |
380 | ||
381 | OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= | |
382 | (int)sizeof(ctx->iv)); | |
383 | if (iv) | |
384 | memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
385 | memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); | |
386 | break; | |
387 | ||
388 | case EVP_CIPH_CTR_MODE: | |
389 | ctx->num = 0; | |
390 | /* Don't reuse IV for CTR mode */ | |
391 | if (iv) | |
392 | memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); | |
393 | break; | |
394 | ||
395 | default: | |
396 | return 0; | |
0f113f3e MC |
397 | } |
398 | } | |
399 | ||
400 | if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { | |
401 | if (!ctx->cipher->init(ctx, key, iv, enc)) | |
402 | return 0; | |
403 | } | |
404 | ctx->buf_len = 0; | |
405 | ctx->final_used = 0; | |
406 | ctx->block_mask = ctx->cipher->block_size - 1; | |
407 | return 1; | |
408 | } | |
d02b48c6 | 409 | |
be06a934 | 410 | int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
411 | const unsigned char *in, int inl) |
412 | { | |
413 | if (ctx->encrypt) | |
414 | return EVP_EncryptUpdate(ctx, out, outl, in, inl); | |
415 | else | |
416 | return EVP_DecryptUpdate(ctx, out, outl, in, inl); | |
417 | } | |
d02b48c6 | 418 | |
581f1c84 | 419 | int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
420 | { |
421 | if (ctx->encrypt) | |
422 | return EVP_EncryptFinal_ex(ctx, out, outl); | |
423 | else | |
424 | return EVP_DecryptFinal_ex(ctx, out, outl); | |
425 | } | |
581f1c84 | 426 | |
6b691a5c | 427 | int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
428 | { |
429 | if (ctx->encrypt) | |
430 | return EVP_EncryptFinal(ctx, out, outl); | |
431 | else | |
432 | return EVP_DecryptFinal(ctx, out, outl); | |
433 | } | |
d02b48c6 | 434 | |
be06a934 | 435 | int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
436 | const unsigned char *key, const unsigned char *iv) |
437 | { | |
438 | return EVP_CipherInit(ctx, cipher, key, iv, 1); | |
439 | } | |
18eda732 | 440 | |
0f113f3e MC |
441 | int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
442 | ENGINE *impl, const unsigned char *key, | |
443 | const unsigned char *iv) | |
444 | { | |
445 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); | |
446 | } | |
d02b48c6 | 447 | |
be06a934 | 448 | int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
0f113f3e MC |
449 | const unsigned char *key, const unsigned char *iv) |
450 | { | |
451 | return EVP_CipherInit(ctx, cipher, key, iv, 0); | |
452 | } | |
18eda732 | 453 | |
0f113f3e MC |
454 | int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
455 | ENGINE *impl, const unsigned char *key, | |
456 | const unsigned char *iv) | |
457 | { | |
458 | return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); | |
459 | } | |
d02b48c6 | 460 | |
c3a73daf AP |
461 | /* |
462 | * According to the letter of standard difference between pointers | |
463 | * is specified to be valid only within same object. This makes | |
464 | * it formally challenging to determine if input and output buffers | |
465 | * are not partially overlapping with standard pointer arithmetic. | |
466 | */ | |
467 | #ifdef PTRDIFF_T | |
468 | # undef PTRDIFF_T | |
469 | #endif | |
470 | #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 | |
471 | /* | |
472 | * Then we have VMS that distinguishes itself by adhering to | |
5fc77684 AP |
473 | * sizeof(size_t)==4 even in 64-bit builds, which means that |
474 | * difference between two pointers might be truncated to 32 bits. | |
475 | * In the context one can even wonder how comparison for | |
476 | * equality is implemented. To be on the safe side we adhere to | |
477 | * PTRDIFF_T even for comparison for equality. | |
c3a73daf AP |
478 | */ |
479 | # define PTRDIFF_T uint64_t | |
480 | #else | |
481 | # define PTRDIFF_T size_t | |
482 | #endif | |
483 | ||
7141ba31 | 484 | int is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
c3a73daf AP |
485 | { |
486 | PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; | |
487 | /* | |
488 | * Check for partially overlapping buffers. [Binary logical | |
489 | * operations are used instead of boolean to minimize number | |
490 | * of conditional branches.] | |
491 | */ | |
83151b73 AP |
492 | int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
493 | (diff > (0 - (PTRDIFF_T)len))); | |
b153f092 | 494 | |
83151b73 | 495 | return overlapped; |
c3a73daf AP |
496 | } |
497 | ||
a8bf2f8f RL |
498 | static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
499 | unsigned char *out, int *outl, | |
500 | const unsigned char *in, int inl) | |
0f113f3e | 501 | { |
64846096 LP |
502 | int i, j, bl, cmpl = inl; |
503 | ||
504 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) | |
505 | cmpl = (cmpl + 7) / 8; | |
0f113f3e | 506 | |
7141ba31 MC |
507 | bl = ctx->cipher->block_size; |
508 | ||
0f113f3e | 509 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
7141ba31 | 510 | /* If block size > 1 then the cipher will have to do this check */ |
64846096 | 511 | if (bl == 1 && is_partially_overlapping(out, in, cmpl)) { |
a8bf2f8f | 512 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 513 | return 0; |
83151b73 | 514 | } |
5fc77684 | 515 | |
0f113f3e MC |
516 | i = ctx->cipher->do_cipher(ctx, out, in, inl); |
517 | if (i < 0) | |
518 | return 0; | |
519 | else | |
520 | *outl = i; | |
521 | return 1; | |
522 | } | |
523 | ||
2c236894 MC |
524 | if (inl <= 0) { |
525 | *outl = 0; | |
526 | return inl == 0; | |
527 | } | |
64846096 | 528 | if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
a8bf2f8f | 529 | EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 530 | return 0; |
83151b73 | 531 | } |
0f113f3e MC |
532 | |
533 | if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { | |
534 | if (ctx->cipher->do_cipher(ctx, out, in, inl)) { | |
535 | *outl = inl; | |
536 | return 1; | |
537 | } else { | |
538 | *outl = 0; | |
539 | return 0; | |
540 | } | |
541 | } | |
542 | i = ctx->buf_len; | |
0f113f3e MC |
543 | OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
544 | if (i != 0) { | |
3f358213 | 545 | if (bl - i > inl) { |
0f113f3e MC |
546 | memcpy(&(ctx->buf[i]), in, inl); |
547 | ctx->buf_len += inl; | |
548 | *outl = 0; | |
549 | return 1; | |
550 | } else { | |
551 | j = bl - i; | |
552 | memcpy(&(ctx->buf[i]), in, j); | |
0f113f3e MC |
553 | inl -= j; |
554 | in += j; | |
5fc77684 AP |
555 | if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
556 | return 0; | |
0f113f3e MC |
557 | out += bl; |
558 | *outl = bl; | |
559 | } | |
560 | } else | |
561 | *outl = 0; | |
562 | i = inl & (bl - 1); | |
563 | inl -= i; | |
564 | if (inl > 0) { | |
565 | if (!ctx->cipher->do_cipher(ctx, out, in, inl)) | |
566 | return 0; | |
567 | *outl += inl; | |
568 | } | |
569 | ||
570 | if (i != 0) | |
571 | memcpy(ctx->buf, &(in[inl]), i); | |
572 | ctx->buf_len = i; | |
573 | return 1; | |
574 | } | |
d02b48c6 | 575 | |
a8bf2f8f RL |
576 | |
577 | int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, | |
578 | const unsigned char *in, int inl) | |
579 | { | |
df05f2ce MC |
580 | int ret; |
581 | size_t soutl; | |
3b94944c | 582 | int blocksize; |
df05f2ce | 583 | |
a8bf2f8f RL |
584 | /* Prevent accidental use of decryption context when encrypting */ |
585 | if (!ctx->encrypt) { | |
586 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
587 | return 0; | |
588 | } | |
589 | ||
d4d89a07 SS |
590 | if (ctx->cipher == NULL) { |
591 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
592 | return 0; | |
593 | } | |
594 | ||
595 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
596 | goto legacy; |
597 | ||
3b94944c MC |
598 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
599 | ||
600 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
601 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); |
602 | return 0; | |
603 | } | |
3b94944c MC |
604 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
605 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
606 | (size_t)inl); | |
df05f2ce | 607 | |
36e619d7 GV |
608 | if (ret) { |
609 | if (soutl > INT_MAX) { | |
610 | EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
611 | return 0; | |
612 | } | |
613 | *outl = soutl; | |
df05f2ce | 614 | } |
36e619d7 | 615 | |
df05f2ce MC |
616 | return ret; |
617 | ||
618 | /* TODO(3.0): Remove legacy code below */ | |
619 | legacy: | |
620 | ||
a8bf2f8f RL |
621 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
622 | } | |
623 | ||
be06a934 | 624 | int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
625 | { |
626 | int ret; | |
627 | ret = EVP_EncryptFinal_ex(ctx, out, outl); | |
628 | return ret; | |
629 | } | |
581f1c84 DSH |
630 | |
631 | int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
632 | { |
633 | int n, ret; | |
634 | unsigned int i, b, bl; | |
df05f2ce | 635 | size_t soutl; |
3b94944c | 636 | int blocksize; |
0f113f3e | 637 | |
a8bf2f8f RL |
638 | /* Prevent accidental use of decryption context when encrypting */ |
639 | if (!ctx->encrypt) { | |
640 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
641 | return 0; | |
642 | } | |
643 | ||
4894dcad P |
644 | if (ctx->cipher == NULL) { |
645 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
646 | return 0; | |
647 | } | |
648 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
649 | goto legacy; |
650 | ||
3b94944c MC |
651 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
652 | ||
653 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
654 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
655 | return 0; | |
656 | } | |
657 | ||
3b94944c MC |
658 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
659 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce | 660 | |
36e619d7 GV |
661 | if (ret) { |
662 | if (soutl > INT_MAX) { | |
663 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
664 | return 0; | |
665 | } | |
666 | *outl = soutl; | |
df05f2ce | 667 | } |
df05f2ce MC |
668 | |
669 | return ret; | |
670 | ||
671 | /* TODO(3.0): Remove legacy code below */ | |
672 | legacy: | |
673 | ||
0f113f3e MC |
674 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
675 | ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
676 | if (ret < 0) | |
677 | return 0; | |
678 | else | |
679 | *outl = ret; | |
680 | return 1; | |
681 | } | |
682 | ||
683 | b = ctx->cipher->block_size; | |
cbe29648 | 684 | OPENSSL_assert(b <= sizeof(ctx->buf)); |
0f113f3e MC |
685 | if (b == 1) { |
686 | *outl = 0; | |
687 | return 1; | |
688 | } | |
689 | bl = ctx->buf_len; | |
690 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
691 | if (bl) { | |
692 | EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, | |
693 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
694 | return 0; | |
695 | } | |
696 | *outl = 0; | |
697 | return 1; | |
698 | } | |
699 | ||
700 | n = b - bl; | |
701 | for (i = bl; i < b; i++) | |
702 | ctx->buf[i] = n; | |
703 | ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); | |
704 | ||
705 | if (ret) | |
706 | *outl = b; | |
707 | ||
708 | return ret; | |
709 | } | |
d02b48c6 | 710 | |
be06a934 | 711 | int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
712 | const unsigned char *in, int inl) |
713 | { | |
df05f2ce | 714 | int fix_len, cmpl = inl, ret; |
0f113f3e | 715 | unsigned int b; |
df05f2ce | 716 | size_t soutl; |
3b94944c | 717 | int blocksize; |
0f113f3e | 718 | |
a8bf2f8f RL |
719 | /* Prevent accidental use of encryption context when decrypting */ |
720 | if (ctx->encrypt) { | |
721 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); | |
722 | return 0; | |
723 | } | |
724 | ||
d2c2e49e P |
725 | if (ctx->cipher == NULL) { |
726 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET); | |
727 | return 0; | |
728 | } | |
729 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
730 | goto legacy; |
731 | ||
3b94944c MC |
732 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
733 | ||
734 | if (ctx->cipher->cupdate == NULL || blocksize < 1) { | |
df05f2ce MC |
735 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); |
736 | return 0; | |
737 | } | |
3b94944c MC |
738 | ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl, |
739 | inl + (blocksize == 1 ? 0 : blocksize), in, | |
740 | (size_t)inl); | |
df05f2ce MC |
741 | |
742 | if (ret) { | |
743 | if (soutl > INT_MAX) { | |
744 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR); | |
745 | return 0; | |
746 | } | |
747 | *outl = soutl; | |
748 | } | |
749 | ||
750 | return ret; | |
751 | ||
752 | /* TODO(3.0): Remove legacy code below */ | |
753 | legacy: | |
754 | ||
7141ba31 MC |
755 | b = ctx->cipher->block_size; |
756 | ||
64846096 LP |
757 | if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
758 | cmpl = (cmpl + 7) / 8; | |
759 | ||
0f113f3e | 760 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
64846096 | 761 | if (b == 1 && is_partially_overlapping(out, in, cmpl)) { |
83151b73 | 762 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); |
5fc77684 | 763 | return 0; |
83151b73 | 764 | } |
5fc77684 | 765 | |
0f113f3e MC |
766 | fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
767 | if (fix_len < 0) { | |
768 | *outl = 0; | |
769 | return 0; | |
770 | } else | |
771 | *outl = fix_len; | |
772 | return 1; | |
773 | } | |
774 | ||
2c236894 MC |
775 | if (inl <= 0) { |
776 | *outl = 0; | |
777 | return inl == 0; | |
778 | } | |
779 | ||
0f113f3e | 780 | if (ctx->flags & EVP_CIPH_NO_PADDING) |
a8bf2f8f | 781 | return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
0f113f3e | 782 | |
cbe29648 | 783 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
784 | |
785 | if (ctx->final_used) { | |
5fc77684 AP |
786 | /* see comment about PTRDIFF_T comparison above */ |
787 | if (((PTRDIFF_T)out == (PTRDIFF_T)in) | |
83151b73 AP |
788 | || is_partially_overlapping(out, in, b)) { |
789 | EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); | |
5fc77684 | 790 | return 0; |
83151b73 | 791 | } |
0f113f3e MC |
792 | memcpy(out, ctx->final, b); |
793 | out += b; | |
794 | fix_len = 1; | |
795 | } else | |
796 | fix_len = 0; | |
797 | ||
a8bf2f8f | 798 | if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
0f113f3e MC |
799 | return 0; |
800 | ||
801 | /* | |
802 | * if we have 'decrypted' a multiple of block size, make sure we have a | |
803 | * copy of this last block | |
804 | */ | |
805 | if (b > 1 && !ctx->buf_len) { | |
806 | *outl -= b; | |
807 | ctx->final_used = 1; | |
808 | memcpy(ctx->final, &out[*outl], b); | |
809 | } else | |
810 | ctx->final_used = 0; | |
811 | ||
812 | if (fix_len) | |
813 | *outl += b; | |
814 | ||
815 | return 1; | |
816 | } | |
d02b48c6 | 817 | |
6b691a5c | 818 | int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
819 | { |
820 | int ret; | |
821 | ret = EVP_DecryptFinal_ex(ctx, out, outl); | |
822 | return ret; | |
823 | } | |
581f1c84 DSH |
824 | |
825 | int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
0f113f3e MC |
826 | { |
827 | int i, n; | |
828 | unsigned int b; | |
df05f2ce MC |
829 | size_t soutl; |
830 | int ret; | |
3b94944c | 831 | int blocksize; |
a8bf2f8f RL |
832 | |
833 | /* Prevent accidental use of encryption context when decrypting */ | |
834 | if (ctx->encrypt) { | |
835 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); | |
836 | return 0; | |
837 | } | |
838 | ||
d4d89a07 SS |
839 | if (ctx->cipher == NULL) { |
840 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET); | |
841 | return 0; | |
842 | } | |
843 | ||
844 | if (ctx->cipher->prov == NULL) | |
df05f2ce MC |
845 | goto legacy; |
846 | ||
3b94944c MC |
847 | blocksize = EVP_CIPHER_CTX_block_size(ctx); |
848 | ||
849 | if (blocksize < 1 || ctx->cipher->cfinal == NULL) { | |
df05f2ce MC |
850 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); |
851 | return 0; | |
852 | } | |
853 | ||
3b94944c MC |
854 | ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl, |
855 | blocksize == 1 ? 0 : blocksize); | |
df05f2ce MC |
856 | |
857 | if (ret) { | |
858 | if (soutl > INT_MAX) { | |
859 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR); | |
860 | return 0; | |
861 | } | |
862 | *outl = soutl; | |
863 | } | |
864 | ||
865 | return ret; | |
866 | ||
867 | /* TODO(3.0): Remove legacy code below */ | |
868 | legacy: | |
869 | ||
0f113f3e | 870 | *outl = 0; |
0f113f3e MC |
871 | if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
872 | i = ctx->cipher->do_cipher(ctx, out, NULL, 0); | |
873 | if (i < 0) | |
874 | return 0; | |
875 | else | |
876 | *outl = i; | |
877 | return 1; | |
878 | } | |
879 | ||
880 | b = ctx->cipher->block_size; | |
881 | if (ctx->flags & EVP_CIPH_NO_PADDING) { | |
882 | if (ctx->buf_len) { | |
883 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, | |
884 | EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); | |
885 | return 0; | |
886 | } | |
887 | *outl = 0; | |
888 | return 1; | |
889 | } | |
890 | if (b > 1) { | |
891 | if (ctx->buf_len || !ctx->final_used) { | |
892 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); | |
26a7d938 | 893 | return 0; |
0f113f3e | 894 | } |
cbe29648 | 895 | OPENSSL_assert(b <= sizeof(ctx->final)); |
0f113f3e MC |
896 | |
897 | /* | |
898 | * The following assumes that the ciphertext has been authenticated. | |
899 | * Otherwise it provides a padding oracle. | |
900 | */ | |
901 | n = ctx->final[b - 1]; | |
902 | if (n == 0 || n > (int)b) { | |
903 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 904 | return 0; |
0f113f3e MC |
905 | } |
906 | for (i = 0; i < n; i++) { | |
907 | if (ctx->final[--b] != n) { | |
908 | EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); | |
26a7d938 | 909 | return 0; |
0f113f3e MC |
910 | } |
911 | } | |
912 | n = ctx->cipher->block_size - n; | |
913 | for (i = 0; i < n; i++) | |
914 | out[i] = ctx->final[i]; | |
915 | *outl = n; | |
916 | } else | |
917 | *outl = 0; | |
208fb891 | 918 | return 1; |
0f113f3e | 919 | } |
d02b48c6 | 920 | |
6343829a | 921 | int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
0f113f3e | 922 | { |
459b15d4 SL |
923 | int ok; |
924 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
925 | ||
926 | params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_KEYLEN, &keylen); | |
927 | ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params); | |
13273237 RL |
928 | |
929 | if (ok != -2) | |
930 | return ok; | |
931 | ||
932 | /* TODO(3.0) legacy code follows */ | |
0f113f3e MC |
933 | if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
934 | return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); | |
df05f2ce | 935 | if (EVP_CIPHER_CTX_key_length(c) == keylen) |
0f113f3e MC |
936 | return 1; |
937 | if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { | |
938 | c->key_len = keylen; | |
939 | return 1; | |
940 | } | |
941 | EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); | |
942 | return 0; | |
943 | } | |
49528751 | 944 | |
f2e5ca84 | 945 | int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
0f113f3e | 946 | { |
13273237 | 947 | int ok; |
459b15d4 | 948 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
13273237 | 949 | |
0f113f3e MC |
950 | if (pad) |
951 | ctx->flags &= ~EVP_CIPH_NO_PADDING; | |
952 | else | |
953 | ctx->flags |= EVP_CIPH_NO_PADDING; | |
df05f2ce | 954 | |
459b15d4 SL |
955 | params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_PADDING, &pad); |
956 | ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
957 | ||
13273237 | 958 | return ok != 0; |
0f113f3e | 959 | } |
f2e5ca84 | 960 | |
49528751 DSH |
961 | int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
962 | { | |
13273237 | 963 | int ret = -2; /* Unsupported */ |
459b15d4 SL |
964 | int set_params = 1; |
965 | size_t sz; | |
966 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
d91f4568 | 967 | |
459b15d4 | 968 | if (ctx == NULL || ctx->cipher == NULL) { |
0f113f3e MC |
969 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); |
970 | return 0; | |
971 | } | |
972 | ||
13273237 RL |
973 | if (ctx->cipher->prov == NULL) |
974 | goto legacy; | |
975 | ||
976 | switch (type) { | |
977 | case EVP_CTRL_SET_KEY_LENGTH: | |
459b15d4 | 978 | params[0] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_KEYLEN, &arg); |
13273237 RL |
979 | break; |
980 | case EVP_CTRL_RAND_KEY: /* Used by DES */ | |
981 | case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ | |
982 | case EVP_CTRL_INIT: /* TODO(3.0) Purely legacy, no provider counterpart */ | |
459b15d4 SL |
983 | default: |
984 | return -2; /* Unsupported */ | |
985 | case EVP_CTRL_GET_IV: | |
986 | set_params = 0; | |
987 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, | |
988 | ptr, (size_t)arg); | |
989 | break; | |
990 | case EVP_CTRL_AEAD_SET_IVLEN: | |
991 | if (arg < 0) | |
992 | return 0; | |
993 | sz = (size_t)arg; | |
994 | params[0] = | |
995 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_IVLEN, &sz); | |
13273237 | 996 | break; |
459b15d4 SL |
997 | case EVP_CTRL_GCM_SET_IV_FIXED: |
998 | params[0] = | |
999 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, | |
1000 | ptr, (size_t)arg); | |
1001 | break; | |
1002 | case EVP_CTRL_AEAD_SET_TAG: | |
1003 | params[0] = | |
1004 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, | |
1005 | ptr, (size_t)arg); | |
1006 | break; | |
1007 | case EVP_CTRL_AEAD_GET_TAG: | |
1008 | set_params = 0; | |
1009 | params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, | |
1010 | ptr, (size_t)arg); | |
1011 | break; | |
1012 | case EVP_CTRL_AEAD_TLS1_AAD: | |
1013 | /* This one does a set and a get - since it returns a padding size */ | |
1014 | params[0] = | |
1015 | OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, | |
1016 | ptr, (size_t)arg); | |
1017 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1018 | if (ret <= 0) | |
1019 | return ret; | |
1020 | params[0] = | |
1021 | OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); | |
1022 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
1023 | if (ret <= 0) | |
1024 | return 0; | |
1025 | return sz; | |
13273237 | 1026 | } |
459b15d4 SL |
1027 | |
1028 | if (set_params) | |
1029 | ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params); | |
1030 | else | |
1031 | ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params); | |
13273237 RL |
1032 | return ret; |
1033 | ||
459b15d4 SL |
1034 | /* TODO(3.0): Remove legacy code below */ |
1035 | legacy: | |
1036 | if (ctx->cipher->ctrl == NULL) { | |
0f113f3e MC |
1037 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | ret = ctx->cipher->ctrl(ctx, type, arg, ptr); | |
1042 | if (ret == -1) { | |
1043 | EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, | |
1044 | EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); | |
1045 | return 0; | |
1046 | } | |
1047 | return ret; | |
49528751 | 1048 | } |
216659eb | 1049 | |
319e518a MC |
1050 | #if !defined(FIPS_MODE) |
1051 | /* TODO(3.0): No support for RAND yet in the FIPS module */ | |
216659eb | 1052 | int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
0f113f3e | 1053 | { |
d0510566 | 1054 | int kl; |
0f113f3e MC |
1055 | if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) |
1056 | return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); | |
d0510566 P |
1057 | kl = EVP_CIPHER_CTX_key_length(ctx); |
1058 | if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0) | |
0f113f3e MC |
1059 | return 0; |
1060 | return 1; | |
1061 | } | |
319e518a | 1062 | #endif |
216659eb | 1063 | |
c2bf7208 | 1064 | int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
0f113f3e MC |
1065 | { |
1066 | if ((in == NULL) || (in->cipher == NULL)) { | |
1067 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); | |
1068 | return 0; | |
1069 | } | |
df05f2ce MC |
1070 | |
1071 | if (in->cipher->prov == NULL) | |
1072 | goto legacy; | |
1073 | ||
1074 | if (in->cipher->dupctx == NULL) { | |
1075 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | EVP_CIPHER_CTX_reset(out); | |
1080 | ||
1081 | *out = *in; | |
1082 | out->provctx = NULL; | |
1083 | ||
70c35fd1 | 1084 | if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
df05f2ce MC |
1085 | out->fetched_cipher = NULL; |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | out->provctx = in->cipher->dupctx(in->provctx); | |
1090 | if (out->provctx == NULL) { | |
1091 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | return 1; | |
1096 | ||
1097 | /* TODO(3.0): Remove legacy code below */ | |
1098 | legacy: | |
1099 | ||
319e518a | 1100 | #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE) |
0f113f3e MC |
1101 | /* Make sure it's safe to copy a cipher context using an ENGINE */ |
1102 | if (in->engine && !ENGINE_init(in->engine)) { | |
1103 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); | |
1104 | return 0; | |
1105 | } | |
c2bf7208 DSH |
1106 | #endif |
1107 | ||
c0ca39bd | 1108 | EVP_CIPHER_CTX_reset(out); |
b4faea50 | 1109 | memcpy(out, in, sizeof(*out)); |
0f113f3e MC |
1110 | |
1111 | if (in->cipher_data && in->cipher->ctx_size) { | |
1112 | out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); | |
90945fa3 | 1113 | if (out->cipher_data == NULL) { |
273a0218 | 1114 | out->cipher = NULL; |
0f113f3e MC |
1115 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); |
1116 | return 0; | |
1117 | } | |
1118 | memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); | |
1119 | } | |
1120 | ||
1121 | if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) | |
273a0218 BE |
1122 | if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
1123 | out->cipher = NULL; | |
1124 | EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); | |
1125 | return 0; | |
1126 | } | |
0f113f3e MC |
1127 | return 1; |
1128 | } | |
df05f2ce | 1129 | |
6b9e3724 RL |
1130 | static void *evp_cipher_from_dispatch(const char *name, |
1131 | const OSSL_DISPATCH *fns, | |
df05f2ce MC |
1132 | OSSL_PROVIDER *prov) |
1133 | { | |
1134 | EVP_CIPHER *cipher = NULL; | |
1135 | int fnciphcnt = 0, fnctxcnt = 0; | |
1136 | ||
0211740f RL |
1137 | /* |
1138 | * The legacy NID is set by EVP_CIPHER_fetch() if the name exists in | |
1139 | * the object database. | |
1140 | */ | |
6b9e3724 RL |
1141 | if ((cipher = EVP_CIPHER_meth_new(0, 0, 0)) == NULL |
1142 | || (cipher->name = OPENSSL_strdup(name)) == NULL) { | |
1143 | EVP_CIPHER_meth_free(cipher); | |
1144 | EVPerr(0, ERR_R_MALLOC_FAILURE); | |
df05f2ce | 1145 | return NULL; |
6b9e3724 | 1146 | } |
df05f2ce MC |
1147 | |
1148 | for (; fns->function_id != 0; fns++) { | |
1149 | switch (fns->function_id) { | |
1150 | case OSSL_FUNC_CIPHER_NEWCTX: | |
1151 | if (cipher->newctx != NULL) | |
1152 | break; | |
1153 | cipher->newctx = OSSL_get_OP_cipher_newctx(fns); | |
1154 | fnctxcnt++; | |
1155 | break; | |
1156 | case OSSL_FUNC_CIPHER_ENCRYPT_INIT: | |
1157 | if (cipher->einit != NULL) | |
1158 | break; | |
1159 | cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns); | |
1160 | fnciphcnt++; | |
1161 | break; | |
1162 | case OSSL_FUNC_CIPHER_DECRYPT_INIT: | |
1163 | if (cipher->dinit != NULL) | |
1164 | break; | |
1165 | cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns); | |
1166 | fnciphcnt++; | |
1167 | break; | |
1168 | case OSSL_FUNC_CIPHER_UPDATE: | |
1169 | if (cipher->cupdate != NULL) | |
1170 | break; | |
1171 | cipher->cupdate = OSSL_get_OP_cipher_update(fns); | |
1172 | fnciphcnt++; | |
1173 | break; | |
1174 | case OSSL_FUNC_CIPHER_FINAL: | |
1175 | if (cipher->cfinal != NULL) | |
1176 | break; | |
1177 | cipher->cfinal = OSSL_get_OP_cipher_final(fns); | |
1178 | fnciphcnt++; | |
1179 | break; | |
718b133a MC |
1180 | case OSSL_FUNC_CIPHER_CIPHER: |
1181 | if (cipher->ccipher != NULL) | |
1182 | break; | |
1183 | cipher->ccipher = OSSL_get_OP_cipher_cipher(fns); | |
1184 | break; | |
df05f2ce MC |
1185 | case OSSL_FUNC_CIPHER_FREECTX: |
1186 | if (cipher->freectx != NULL) | |
1187 | break; | |
1188 | cipher->freectx = OSSL_get_OP_cipher_freectx(fns); | |
1189 | fnctxcnt++; | |
1190 | break; | |
1191 | case OSSL_FUNC_CIPHER_DUPCTX: | |
1192 | if (cipher->dupctx != NULL) | |
1193 | break; | |
1194 | cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns); | |
1195 | break; | |
df05f2ce MC |
1196 | case OSSL_FUNC_CIPHER_GET_PARAMS: |
1197 | if (cipher->get_params != NULL) | |
1198 | break; | |
1199 | cipher->get_params = OSSL_get_OP_cipher_get_params(fns); | |
1200 | break; | |
718b133a MC |
1201 | case OSSL_FUNC_CIPHER_CTX_GET_PARAMS: |
1202 | if (cipher->ctx_get_params != NULL) | |
1203 | break; | |
1204 | cipher->ctx_get_params = OSSL_get_OP_cipher_ctx_get_params(fns); | |
1205 | break; | |
1206 | case OSSL_FUNC_CIPHER_CTX_SET_PARAMS: | |
1207 | if (cipher->ctx_set_params != NULL) | |
df05f2ce | 1208 | break; |
718b133a | 1209 | cipher->ctx_set_params = OSSL_get_OP_cipher_ctx_set_params(fns); |
df05f2ce MC |
1210 | break; |
1211 | } | |
1212 | } | |
718b133a MC |
1213 | if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
1214 | || (fnciphcnt == 0 && cipher->ccipher == NULL) | |
13273237 | 1215 | || fnctxcnt != 2) { |
df05f2ce MC |
1216 | /* |
1217 | * In order to be a consistent set of functions we must have at least | |
1218 | * a complete set of "encrypt" functions, or a complete set of "decrypt" | |
11dbdc07 MC |
1219 | * functions, or a single "cipher" function. In all cases we need both |
1220 | * the "newctx" and "freectx" functions. | |
df05f2ce MC |
1221 | */ |
1222 | EVP_CIPHER_meth_free(cipher); | |
1223 | EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS); | |
1224 | return NULL; | |
1225 | } | |
1226 | cipher->prov = prov; | |
1227 | if (prov != NULL) | |
7c95390e | 1228 | ossl_provider_up_ref(prov); |
df05f2ce MC |
1229 | |
1230 | return cipher; | |
1231 | } | |
1232 | ||
70c35fd1 | 1233 | static int evp_cipher_up_ref(void *cipher) |
df05f2ce | 1234 | { |
70c35fd1 | 1235 | return EVP_CIPHER_up_ref(cipher); |
df05f2ce MC |
1236 | } |
1237 | ||
1238 | static void evp_cipher_free(void *cipher) | |
1239 | { | |
1240 | EVP_CIPHER_meth_free(cipher); | |
1241 | } | |
1242 | ||
df05f2ce MC |
1243 | EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm, |
1244 | const char *properties) | |
1245 | { | |
0211740f RL |
1246 | EVP_CIPHER *cipher = |
1247 | evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, | |
70c35fd1 | 1248 | evp_cipher_from_dispatch, evp_cipher_up_ref, |
0211740f RL |
1249 | evp_cipher_free); |
1250 | ||
1251 | #ifndef FIPS_MODE | |
1252 | /* TODO(3.x) get rid of the need for legacy NIDs */ | |
1253 | if (cipher != NULL) { | |
1254 | /* | |
1255 | * FIPS module note: since internal fetches will be entirely | |
1256 | * provider based, we know that none of its code depends on legacy | |
1257 | * NIDs or any functionality that use them. | |
1258 | */ | |
1259 | cipher->nid = OBJ_sn2nid(algorithm); | |
1260 | } | |
1261 | #endif | |
1262 | ||
1263 | return cipher; | |
df05f2ce | 1264 | } |
c540f00f RL |
1265 | |
1266 | void EVP_CIPHER_do_all_ex(OPENSSL_CTX *libctx, | |
1267 | void (*fn)(EVP_CIPHER *mac, void *arg), | |
1268 | void *arg) | |
1269 | { | |
1270 | evp_generic_do_all(libctx, OSSL_OP_CIPHER, | |
1271 | (void (*)(void *, void *))fn, arg, | |
1272 | evp_cipher_from_dispatch, evp_cipher_free); | |
1273 | } |