1 /*
2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
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
8 */
9
10 /*
11 * EVP _meth_ APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14 #include "internal/deprecated.h"
15
16 #include <stdio.h>
17 #include <string.h>
18 #include "internal/cryptlib.h"
19 #include <openssl/evp.h>
20 #include <openssl/objects.h>
21 #include <openssl/params.h>
22 #include <openssl/core_names.h>
23 #include <openssl/rsa.h>
24 #include <openssl/dh.h>
25 #include <openssl/ec.h>
26 #include "crypto/evp.h"
27 #include "crypto/cryptlib.h"
28 #include "internal/provider.h"
29 #include "evp_local.h"
30
31 #if !defined(FIPS_MODULE)
32 # include "crypto/asn1.h"
33
EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX * c,ASN1_TYPE * type)34 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
35 {
36 return evp_cipher_param_to_asn1_ex(c, type, NULL);
37 }
38
EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX * c,ASN1_TYPE * type)39 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
40 {
41 return evp_cipher_asn1_to_param_ex(c, type, NULL);
42 }
43
EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX * ctx,ASN1_TYPE * type)44 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *ctx, ASN1_TYPE *type)
45 {
46 int i = 0;
47 unsigned int l;
48
49 if (type != NULL) {
50 unsigned char iv[EVP_MAX_IV_LENGTH];
51
52 l = EVP_CIPHER_CTX_get_iv_length(ctx);
53 if (!ossl_assert(l <= sizeof(iv)))
54 return -1;
55 i = ASN1_TYPE_get_octetstring(type, iv, l);
56 if (i != (int)l)
57 return -1;
58
59 if (!EVP_CipherInit_ex(ctx, NULL, NULL, NULL, iv, -1))
60 return -1;
61 }
62 return i;
63 }
64
EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX * c,ASN1_TYPE * type)65 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
66 {
67 int i = 0;
68 unsigned int j;
69 unsigned char *oiv = NULL;
70
71 if (type != NULL) {
72 oiv = (unsigned char *)EVP_CIPHER_CTX_original_iv(c);
73 j = EVP_CIPHER_CTX_get_iv_length(c);
74 OPENSSL_assert(j <= sizeof(c->iv));
75 i = ASN1_TYPE_set_octetstring(type, oiv, j);
76 }
77 return i;
78 }
79
evp_cipher_param_to_asn1_ex(EVP_CIPHER_CTX * c,ASN1_TYPE * type,evp_cipher_aead_asn1_params * asn1_params)80 int evp_cipher_param_to_asn1_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
81 evp_cipher_aead_asn1_params *asn1_params)
82 {
83 int ret = -1; /* Assume the worst */
84 const EVP_CIPHER *cipher = c->cipher;
85
86 /*
87 * For legacy implementations, we detect custom AlgorithmIdentifier
88 * parameter handling by checking if the function pointer
89 * cipher->set_asn1_parameters is set. We know that this pointer
90 * is NULL for provided implementations.
91 *
92 * Otherwise, for any implementation, we check the flag
93 * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
94 * default AI parameter extraction.
95 *
96 * Otherwise, for provided implementations, we convert |type| to
97 * a DER encoded blob and pass to the implementation in OSSL_PARAM
98 * form.
99 *
100 * If none of the above applies, this operation is unsupported.
101 */
102 if (cipher->set_asn1_parameters != NULL) {
103 ret = cipher->set_asn1_parameters(c, type);
104 } else if ((EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
105 switch (EVP_CIPHER_get_mode(cipher)) {
106 case EVP_CIPH_WRAP_MODE:
107 if (EVP_CIPHER_is_a(cipher, SN_id_smime_alg_CMS3DESwrap))
108 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
109 ret = 1;
110 break;
111
112 case EVP_CIPH_GCM_MODE:
113 ret = evp_cipher_set_asn1_aead_params(c, type, asn1_params);
114 break;
115
116 case EVP_CIPH_CCM_MODE:
117 case EVP_CIPH_XTS_MODE:
118 case EVP_CIPH_OCB_MODE:
119 ret = -2;
120 break;
121
122 default:
123 ret = EVP_CIPHER_set_asn1_iv(c, type);
124 }
125 } else if (cipher->prov != NULL) {
126 OSSL_PARAM params[3], *p = params;
127 unsigned char *der = NULL, *derp;
128
129 /*
130 * We make two passes, the first to get the appropriate buffer size,
131 * and the second to get the actual value.
132 */
133 *p++ = OSSL_PARAM_construct_octet_string(
134 OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS,
135 NULL, 0);
136 *p = OSSL_PARAM_construct_end();
137
138 if (!EVP_CIPHER_CTX_get_params(c, params))
139 goto err;
140
141 /* ... but, we should get a return size too! */
142 if (OSSL_PARAM_modified(params)
143 && params[0].return_size != 0
144 && (der = OPENSSL_malloc(params[0].return_size)) != NULL) {
145 params[0].data = der;
146 params[0].data_size = params[0].return_size;
147 OSSL_PARAM_set_all_unmodified(params);
148 derp = der;
149 if (EVP_CIPHER_CTX_get_params(c, params)
150 && OSSL_PARAM_modified(params)
151 && d2i_ASN1_TYPE(&type, (const unsigned char **)&derp,
152 params[0].return_size) != NULL) {
153 ret = 1;
154 }
155 OPENSSL_free(der);
156 }
157 } else {
158 ret = -2;
159 }
160
161 err:
162 if (ret == -2)
163 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_CIPHER);
164 else if (ret <= 0)
165 ERR_raise(ERR_LIB_EVP, EVP_R_CIPHER_PARAMETER_ERROR);
166 if (ret < -1)
167 ret = -1;
168 return ret;
169 }
170
evp_cipher_asn1_to_param_ex(EVP_CIPHER_CTX * c,ASN1_TYPE * type,evp_cipher_aead_asn1_params * asn1_params)171 int evp_cipher_asn1_to_param_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
172 evp_cipher_aead_asn1_params *asn1_params)
173 {
174 int ret = -1; /* Assume the worst */
175 const EVP_CIPHER *cipher = c->cipher;
176
177 /*
178 * For legacy implementations, we detect custom AlgorithmIdentifier
179 * parameter handling by checking if there the function pointer
180 * cipher->get_asn1_parameters is set. We know that this pointer
181 * is NULL for provided implementations.
182 *
183 * Otherwise, for any implementation, we check the flag
184 * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
185 * default AI parameter creation.
186 *
187 * Otherwise, for provided implementations, we get the AI parameter
188 * in DER encoded form from the implementation by requesting the
189 * appropriate OSSL_PARAM and converting the result to a ASN1_TYPE.
190 *
191 * If none of the above applies, this operation is unsupported.
192 */
193 if (cipher->get_asn1_parameters != NULL) {
194 ret = cipher->get_asn1_parameters(c, type);
195 } else if ((EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
196 switch (EVP_CIPHER_get_mode(cipher)) {
197 case EVP_CIPH_WRAP_MODE:
198 ret = 1;
199 break;
200
201 case EVP_CIPH_GCM_MODE:
202 ret = evp_cipher_get_asn1_aead_params(c, type, asn1_params);
203 break;
204
205 case EVP_CIPH_CCM_MODE:
206 case EVP_CIPH_XTS_MODE:
207 case EVP_CIPH_OCB_MODE:
208 ret = -2;
209 break;
210
211 default:
212 ret = EVP_CIPHER_get_asn1_iv(c, type);
213 }
214 } else if (cipher->prov != NULL) {
215 OSSL_PARAM params[3], *p = params;
216 unsigned char *der = NULL;
217 int derl = -1;
218
219 if ((derl = i2d_ASN1_TYPE(type, &der)) >= 0) {
220 *p++ =
221 OSSL_PARAM_construct_octet_string(
222 OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS,
223 der, (size_t)derl);
224 *p = OSSL_PARAM_construct_end();
225 if (EVP_CIPHER_CTX_set_params(c, params))
226 ret = 1;
227 OPENSSL_free(der);
228 }
229 } else {
230 ret = -2;
231 }
232
233 if (ret == -2)
234 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_CIPHER);
235 else if (ret <= 0)
236 ERR_raise(ERR_LIB_EVP, EVP_R_CIPHER_PARAMETER_ERROR);
237 if (ret < -1)
238 ret = -1;
239 return ret;
240 }
241
evp_cipher_get_asn1_aead_params(EVP_CIPHER_CTX * c,ASN1_TYPE * type,evp_cipher_aead_asn1_params * asn1_params)242 int evp_cipher_get_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
243 evp_cipher_aead_asn1_params *asn1_params)
244 {
245 int i = 0;
246 long tl;
247 unsigned char iv[EVP_MAX_IV_LENGTH];
248
249 if (type == NULL || asn1_params == NULL)
250 return 0;
251
252 i = ossl_asn1_type_get_octetstring_int(type, &tl, NULL, EVP_MAX_IV_LENGTH);
253 if (i <= 0)
254 return -1;
255 ossl_asn1_type_get_octetstring_int(type, &tl, iv, i);
256
257 memcpy(asn1_params->iv, iv, i);
258 asn1_params->iv_len = i;
259
260 return i;
261 }
262
evp_cipher_set_asn1_aead_params(EVP_CIPHER_CTX * c,ASN1_TYPE * type,evp_cipher_aead_asn1_params * asn1_params)263 int evp_cipher_set_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
264 evp_cipher_aead_asn1_params *asn1_params)
265 {
266 if (type == NULL || asn1_params == NULL)
267 return 0;
268
269 return ossl_asn1_type_set_octetstring_int(type, asn1_params->tag_len,
270 asn1_params->iv,
271 asn1_params->iv_len);
272 }
273 #endif /* !defined(FIPS_MODULE) */
274
275 /* Convert the various cipher NIDs and dummies to a proper OID NID */
EVP_CIPHER_get_type(const EVP_CIPHER * cipher)276 int EVP_CIPHER_get_type(const EVP_CIPHER *cipher)
277 {
278 int nid;
279 nid = EVP_CIPHER_get_nid(cipher);
280
281 switch (nid) {
282
283 case NID_rc2_cbc:
284 case NID_rc2_64_cbc:
285 case NID_rc2_40_cbc:
286
287 return NID_rc2_cbc;
288
289 case NID_rc4:
290 case NID_rc4_40:
291
292 return NID_rc4;
293
294 case NID_aes_128_cfb128:
295 case NID_aes_128_cfb8:
296 case NID_aes_128_cfb1:
297
298 return NID_aes_128_cfb128;
299
300 case NID_aes_192_cfb128:
301 case NID_aes_192_cfb8:
302 case NID_aes_192_cfb1:
303
304 return NID_aes_192_cfb128;
305
306 case NID_aes_256_cfb128:
307 case NID_aes_256_cfb8:
308 case NID_aes_256_cfb1:
309
310 return NID_aes_256_cfb128;
311
312 case NID_des_cfb64:
313 case NID_des_cfb8:
314 case NID_des_cfb1:
315
316 return NID_des_cfb64;
317
318 case NID_des_ede3_cfb64:
319 case NID_des_ede3_cfb8:
320 case NID_des_ede3_cfb1:
321
322 return NID_des_cfb64;
323
324 default:
325 #ifdef FIPS_MODULE
326 return NID_undef;
327 #else
328 {
329 /* Check it has an OID and it is valid */
330 ASN1_OBJECT *otmp = OBJ_nid2obj(nid);
331
332 if (OBJ_get0_data(otmp) == NULL)
333 nid = NID_undef;
334 ASN1_OBJECT_free(otmp);
335 return nid;
336 }
337 #endif
338 }
339 }
340
evp_cipher_cache_constants(EVP_CIPHER * cipher)341 int evp_cipher_cache_constants(EVP_CIPHER *cipher)
342 {
343 int ok, aead = 0, custom_iv = 0, cts = 0, multiblock = 0, randkey = 0;
344 size_t ivlen = 0;
345 size_t blksz = 0;
346 size_t keylen = 0;
347 unsigned int mode = 0;
348 OSSL_PARAM params[10];
349
350 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_BLOCK_SIZE, &blksz);
351 params[1] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &ivlen);
352 params[2] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &keylen);
353 params[3] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_MODE, &mode);
354 params[4] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_AEAD, &aead);
355 params[5] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_CUSTOM_IV,
356 &custom_iv);
357 params[6] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_CTS, &cts);
358 params[7] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK,
359 &multiblock);
360 params[8] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_HAS_RAND_KEY,
361 &randkey);
362 params[9] = OSSL_PARAM_construct_end();
363 ok = evp_do_ciph_getparams(cipher, params) > 0;
364 if (ok) {
365 cipher->block_size = blksz;
366 cipher->iv_len = ivlen;
367 cipher->key_len = keylen;
368 cipher->flags = mode;
369 if (aead)
370 cipher->flags |= EVP_CIPH_FLAG_AEAD_CIPHER;
371 if (custom_iv)
372 cipher->flags |= EVP_CIPH_CUSTOM_IV;
373 if (cts)
374 cipher->flags |= EVP_CIPH_FLAG_CTS;
375 if (multiblock)
376 cipher->flags |= EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK;
377 if (cipher->ccipher != NULL)
378 cipher->flags |= EVP_CIPH_FLAG_CUSTOM_CIPHER;
379 if (randkey)
380 cipher->flags |= EVP_CIPH_RAND_KEY;
381 if (OSSL_PARAM_locate_const(EVP_CIPHER_gettable_ctx_params(cipher),
382 OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS))
383 cipher->flags |= EVP_CIPH_FLAG_CUSTOM_ASN1;
384 }
385 return ok;
386 }
387
EVP_CIPHER_get_block_size(const EVP_CIPHER * cipher)388 int EVP_CIPHER_get_block_size(const EVP_CIPHER *cipher)
389 {
390 return cipher->block_size;
391 }
392
EVP_CIPHER_CTX_get_block_size(const EVP_CIPHER_CTX * ctx)393 int EVP_CIPHER_CTX_get_block_size(const EVP_CIPHER_CTX *ctx)
394 {
395 return EVP_CIPHER_get_block_size(ctx->cipher);
396 }
397
EVP_CIPHER_impl_ctx_size(const EVP_CIPHER * e)398 int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e)
399 {
400 return e->ctx_size;
401 }
402
EVP_Cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,unsigned int inl)403 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
404 const unsigned char *in, unsigned int inl)
405 {
406 if (ctx->cipher->prov != NULL) {
407 /*
408 * If the provided implementation has a ccipher function, we use it,
409 * and translate its return value like this: 0 => -1, 1 => outlen
410 *
411 * Otherwise, we call the cupdate function if in != NULL, or cfinal
412 * if in == NULL. Regardless of which, we return what we got.
413 */
414 int ret = -1;
415 size_t outl = 0;
416 size_t blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
417
418 if (ctx->cipher->ccipher != NULL)
419 ret = ctx->cipher->ccipher(ctx->algctx, out, &outl,
420 inl + (blocksize == 1 ? 0 : blocksize),
421 in, (size_t)inl)
422 ? (int)outl : -1;
423 else if (in != NULL)
424 ret = ctx->cipher->cupdate(ctx->algctx, out, &outl,
425 inl + (blocksize == 1 ? 0 : blocksize),
426 in, (size_t)inl);
427 else
428 ret = ctx->cipher->cfinal(ctx->algctx, out, &outl,
429 blocksize == 1 ? 0 : blocksize);
430
431 return ret;
432 }
433
434 return ctx->cipher->do_cipher(ctx, out, in, inl);
435 }
436
437 #ifndef OPENSSL_NO_DEPRECATED_3_0
EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX * ctx)438 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
439 {
440 if (ctx == NULL)
441 return NULL;
442 return ctx->cipher;
443 }
444 #endif
445
EVP_CIPHER_CTX_get0_cipher(const EVP_CIPHER_CTX * ctx)446 const EVP_CIPHER *EVP_CIPHER_CTX_get0_cipher(const EVP_CIPHER_CTX *ctx)
447 {
448 if (ctx == NULL)
449 return NULL;
450 return ctx->cipher;
451 }
452
EVP_CIPHER_CTX_get1_cipher(EVP_CIPHER_CTX * ctx)453 EVP_CIPHER *EVP_CIPHER_CTX_get1_cipher(EVP_CIPHER_CTX *ctx)
454 {
455 EVP_CIPHER *cipher;
456
457 if (ctx == NULL)
458 return NULL;
459 cipher = (EVP_CIPHER *)ctx->cipher;
460 if (!EVP_CIPHER_up_ref(cipher))
461 return NULL;
462 return cipher;
463 }
464
EVP_CIPHER_CTX_is_encrypting(const EVP_CIPHER_CTX * ctx)465 int EVP_CIPHER_CTX_is_encrypting(const EVP_CIPHER_CTX *ctx)
466 {
467 return ctx->encrypt;
468 }
469
EVP_CIPHER_get_flags(const EVP_CIPHER * cipher)470 unsigned long EVP_CIPHER_get_flags(const EVP_CIPHER *cipher)
471 {
472 return cipher->flags;
473 }
474
EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX * ctx)475 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
476 {
477 return ctx->app_data;
478 }
479
EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX * ctx,void * data)480 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
481 {
482 ctx->app_data = data;
483 }
484
EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX * ctx)485 void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx)
486 {
487 return ctx->cipher_data;
488 }
489
EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX * ctx,void * cipher_data)490 void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data)
491 {
492 void *old_cipher_data;
493
494 old_cipher_data = ctx->cipher_data;
495 ctx->cipher_data = cipher_data;
496
497 return old_cipher_data;
498 }
499
EVP_CIPHER_get_iv_length(const EVP_CIPHER * cipher)500 int EVP_CIPHER_get_iv_length(const EVP_CIPHER *cipher)
501 {
502 return cipher->iv_len;
503 }
504
EVP_CIPHER_CTX_get_iv_length(const EVP_CIPHER_CTX * ctx)505 int EVP_CIPHER_CTX_get_iv_length(const EVP_CIPHER_CTX *ctx)
506 {
507 if (ctx->iv_len < 0) {
508 int rv, len = EVP_CIPHER_get_iv_length(ctx->cipher);
509 size_t v = len;
510 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
511
512 if (ctx->cipher->get_ctx_params != NULL) {
513 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN,
514 &v);
515 rv = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
516 if (rv > 0) {
517 if (OSSL_PARAM_modified(params)
518 && !OSSL_PARAM_get_int(params, &len))
519 return -1;
520 } else if (rv != EVP_CTRL_RET_UNSUPPORTED) {
521 return -1;
522 }
523 }
524 /* Code below to be removed when legacy support is dropped. */
525 else if ((EVP_CIPHER_get_flags(ctx->cipher)
526 & EVP_CIPH_CUSTOM_IV_LENGTH) != 0) {
527 rv = EVP_CIPHER_CTX_ctrl((EVP_CIPHER_CTX *)ctx, EVP_CTRL_GET_IVLEN,
528 0, &len);
529 if (rv <= 0)
530 return -1;
531 }
532 /*-
533 * Casting away the const is annoying but required here. We need to
534 * cache the result for performance reasons.
535 */
536 ((EVP_CIPHER_CTX *)ctx)->iv_len = len;
537 }
538 return ctx->iv_len;
539 }
540
EVP_CIPHER_CTX_get_tag_length(const EVP_CIPHER_CTX * ctx)541 int EVP_CIPHER_CTX_get_tag_length(const EVP_CIPHER_CTX *ctx)
542 {
543 int ret;
544 size_t v = 0;
545 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
546
547 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, &v);
548 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
549 return ret == 1 ? (int)v : 0;
550 }
551
552 #ifndef OPENSSL_NO_DEPRECATED_3_0
EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX * ctx)553 const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
554 {
555 int ok;
556 const unsigned char *v = ctx->oiv;
557 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
558
559 params[0] =
560 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV,
561 (void **)&v, sizeof(ctx->oiv));
562 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
563
564 return ok != 0 ? v : NULL;
565 }
566
567 /*
568 * OSSL_PARAM_OCTET_PTR gets us the pointer to the running IV in the provider
569 */
EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX * ctx)570 const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
571 {
572 int ok;
573 const unsigned char *v = ctx->iv;
574 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
575
576 params[0] =
577 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_UPDATED_IV,
578 (void **)&v, sizeof(ctx->iv));
579 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
580
581 return ok != 0 ? v : NULL;
582 }
583
EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX * ctx)584 unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
585 {
586 int ok;
587 unsigned char *v = ctx->iv;
588 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
589
590 params[0] =
591 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_UPDATED_IV,
592 (void **)&v, sizeof(ctx->iv));
593 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
594
595 return ok != 0 ? v : NULL;
596 }
597 #endif /* OPENSSL_NO_DEPRECATED_3_0_0 */
598
EVP_CIPHER_CTX_get_updated_iv(EVP_CIPHER_CTX * ctx,void * buf,size_t len)599 int EVP_CIPHER_CTX_get_updated_iv(EVP_CIPHER_CTX *ctx, void *buf, size_t len)
600 {
601 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
602
603 params[0] =
604 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_UPDATED_IV, buf, len);
605 return evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
606 }
607
EVP_CIPHER_CTX_get_original_iv(EVP_CIPHER_CTX * ctx,void * buf,size_t len)608 int EVP_CIPHER_CTX_get_original_iv(EVP_CIPHER_CTX *ctx, void *buf, size_t len)
609 {
610 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
611
612 params[0] =
613 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, buf, len);
614 return evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
615 }
616
EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX * ctx)617 unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
618 {
619 return ctx->buf;
620 }
621
EVP_CIPHER_CTX_get_num(const EVP_CIPHER_CTX * ctx)622 int EVP_CIPHER_CTX_get_num(const EVP_CIPHER_CTX *ctx)
623 {
624 int ok;
625 unsigned int v = (unsigned int)ctx->num;
626 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
627
628 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &v);
629 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
630
631 return ok != 0 ? (int)v : EVP_CTRL_RET_UNSUPPORTED;
632 }
633
EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX * ctx,int num)634 int EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
635 {
636 int ok;
637 unsigned int n = (unsigned int)num;
638 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
639
640 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &n);
641 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
642
643 if (ok != 0)
644 ctx->num = (int)n;
645 return ok != 0;
646 }
647
EVP_CIPHER_get_key_length(const EVP_CIPHER * cipher)648 int EVP_CIPHER_get_key_length(const EVP_CIPHER *cipher)
649 {
650 return cipher->key_len;
651 }
652
EVP_CIPHER_CTX_get_key_length(const EVP_CIPHER_CTX * ctx)653 int EVP_CIPHER_CTX_get_key_length(const EVP_CIPHER_CTX *ctx)
654 {
655 if (ctx->key_len <= 0 && ctx->cipher->prov != NULL) {
656 int ok;
657 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
658 size_t len;
659
660 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
661 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
662 if (ok <= 0)
663 return EVP_CTRL_RET_UNSUPPORTED;
664
665 /*-
666 * The if branch should never be taken since EVP_MAX_KEY_LENGTH is
667 * less than INT_MAX but best to be safe.
668 *
669 * Casting away the const is annoying but required here. We need to
670 * cache the result for performance reasons.
671 */
672 if (!OSSL_PARAM_get_int(params, &((EVP_CIPHER_CTX *)ctx)->key_len))
673 return -1;
674 ((EVP_CIPHER_CTX *)ctx)->key_len = (int)len;
675 }
676 return ctx->key_len;
677 }
678
EVP_CIPHER_get_nid(const EVP_CIPHER * cipher)679 int EVP_CIPHER_get_nid(const EVP_CIPHER *cipher)
680 {
681 return cipher->nid;
682 }
683
EVP_CIPHER_CTX_get_nid(const EVP_CIPHER_CTX * ctx)684 int EVP_CIPHER_CTX_get_nid(const EVP_CIPHER_CTX *ctx)
685 {
686 return ctx->cipher->nid;
687 }
688
EVP_CIPHER_is_a(const EVP_CIPHER * cipher,const char * name)689 int EVP_CIPHER_is_a(const EVP_CIPHER *cipher, const char *name)
690 {
691 if (cipher == NULL)
692 return 0;
693 if (cipher->prov != NULL)
694 return evp_is_a(cipher->prov, cipher->name_id, NULL, name);
695 return evp_is_a(NULL, 0, EVP_CIPHER_get0_name(cipher), name);
696 }
697
evp_cipher_get_number(const EVP_CIPHER * cipher)698 int evp_cipher_get_number(const EVP_CIPHER *cipher)
699 {
700 return cipher->name_id;
701 }
702
EVP_CIPHER_get0_name(const EVP_CIPHER * cipher)703 const char *EVP_CIPHER_get0_name(const EVP_CIPHER *cipher)
704 {
705 if (cipher->type_name != NULL)
706 return cipher->type_name;
707 #ifndef FIPS_MODULE
708 return OBJ_nid2sn(EVP_CIPHER_get_nid(cipher));
709 #else
710 return NULL;
711 #endif
712 }
713
EVP_CIPHER_get0_description(const EVP_CIPHER * cipher)714 const char *EVP_CIPHER_get0_description(const EVP_CIPHER *cipher)
715 {
716 if (cipher->description != NULL)
717 return cipher->description;
718 #ifndef FIPS_MODULE
719 return OBJ_nid2ln(EVP_CIPHER_get_nid(cipher));
720 #else
721 return NULL;
722 #endif
723 }
724
EVP_CIPHER_names_do_all(const EVP_CIPHER * cipher,void (* fn)(const char * name,void * data),void * data)725 int EVP_CIPHER_names_do_all(const EVP_CIPHER *cipher,
726 void (*fn)(const char *name, void *data),
727 void *data)
728 {
729 if (cipher->prov != NULL)
730 return evp_names_do_all(cipher->prov, cipher->name_id, fn, data);
731
732 return 1;
733 }
734
EVP_CIPHER_get0_provider(const EVP_CIPHER * cipher)735 const OSSL_PROVIDER *EVP_CIPHER_get0_provider(const EVP_CIPHER *cipher)
736 {
737 return cipher->prov;
738 }
739
EVP_CIPHER_get_mode(const EVP_CIPHER * cipher)740 int EVP_CIPHER_get_mode(const EVP_CIPHER *cipher)
741 {
742 return EVP_CIPHER_get_flags(cipher) & EVP_CIPH_MODE;
743 }
744
EVP_MD_is_a(const EVP_MD * md,const char * name)745 int EVP_MD_is_a(const EVP_MD *md, const char *name)
746 {
747 if (md == NULL)
748 return 0;
749 if (md->prov != NULL)
750 return evp_is_a(md->prov, md->name_id, NULL, name);
751 return evp_is_a(NULL, 0, EVP_MD_get0_name(md), name);
752 }
753
evp_md_get_number(const EVP_MD * md)754 int evp_md_get_number(const EVP_MD *md)
755 {
756 return md->name_id;
757 }
758
EVP_MD_get0_description(const EVP_MD * md)759 const char *EVP_MD_get0_description(const EVP_MD *md)
760 {
761 if (md->description != NULL)
762 return md->description;
763 #ifndef FIPS_MODULE
764 return OBJ_nid2ln(EVP_MD_nid(md));
765 #else
766 return NULL;
767 #endif
768 }
769
EVP_MD_get0_name(const EVP_MD * md)770 const char *EVP_MD_get0_name(const EVP_MD *md)
771 {
772 if (md == NULL)
773 return NULL;
774 if (md->type_name != NULL)
775 return md->type_name;
776 #ifndef FIPS_MODULE
777 return OBJ_nid2sn(EVP_MD_nid(md));
778 #else
779 return NULL;
780 #endif
781 }
782
EVP_MD_names_do_all(const EVP_MD * md,void (* fn)(const char * name,void * data),void * data)783 int EVP_MD_names_do_all(const EVP_MD *md,
784 void (*fn)(const char *name, void *data),
785 void *data)
786 {
787 if (md->prov != NULL)
788 return evp_names_do_all(md->prov, md->name_id, fn, data);
789
790 return 1;
791 }
792
EVP_MD_get0_provider(const EVP_MD * md)793 const OSSL_PROVIDER *EVP_MD_get0_provider(const EVP_MD *md)
794 {
795 return md->prov;
796 }
797
EVP_MD_get_type(const EVP_MD * md)798 int EVP_MD_get_type(const EVP_MD *md)
799 {
800 return md->type;
801 }
802
EVP_MD_get_pkey_type(const EVP_MD * md)803 int EVP_MD_get_pkey_type(const EVP_MD *md)
804 {
805 return md->pkey_type;
806 }
807
EVP_MD_get_block_size(const EVP_MD * md)808 int EVP_MD_get_block_size(const EVP_MD *md)
809 {
810 if (md == NULL) {
811 ERR_raise(ERR_LIB_EVP, EVP_R_MESSAGE_DIGEST_IS_NULL);
812 return -1;
813 }
814 return md->block_size;
815 }
816
EVP_MD_get_size(const EVP_MD * md)817 int EVP_MD_get_size(const EVP_MD *md)
818 {
819 if (md == NULL) {
820 ERR_raise(ERR_LIB_EVP, EVP_R_MESSAGE_DIGEST_IS_NULL);
821 return -1;
822 }
823 return md->md_size;
824 }
825
EVP_MD_get_flags(const EVP_MD * md)826 unsigned long EVP_MD_get_flags(const EVP_MD *md)
827 {
828 return md->flags;
829 }
830
EVP_MD_meth_new(int md_type,int pkey_type)831 EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
832 {
833 EVP_MD *md = evp_md_new();
834
835 if (md != NULL) {
836 md->type = md_type;
837 md->pkey_type = pkey_type;
838 md->origin = EVP_ORIG_METH;
839 }
840 return md;
841 }
842
EVP_MD_meth_dup(const EVP_MD * md)843 EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
844 {
845 EVP_MD *to = NULL;
846
847 /*
848 * Non-legacy EVP_MDs can't be duplicated like this.
849 * Use EVP_MD_up_ref() instead.
850 */
851 if (md->prov != NULL)
852 return NULL;
853
854 if ((to = EVP_MD_meth_new(md->type, md->pkey_type)) != NULL) {
855 CRYPTO_RWLOCK *lock = to->lock;
856
857 memcpy(to, md, sizeof(*to));
858 to->lock = lock;
859 to->origin = EVP_ORIG_METH;
860 }
861 return to;
862 }
863
evp_md_free_int(EVP_MD * md)864 void evp_md_free_int(EVP_MD *md)
865 {
866 OPENSSL_free(md->type_name);
867 ossl_provider_free(md->prov);
868 CRYPTO_THREAD_lock_free(md->lock);
869 OPENSSL_free(md);
870 }
871
EVP_MD_meth_free(EVP_MD * md)872 void EVP_MD_meth_free(EVP_MD *md)
873 {
874 if (md == NULL || md->origin != EVP_ORIG_METH)
875 return;
876
877 evp_md_free_int(md);
878 }
879
EVP_MD_meth_set_input_blocksize(EVP_MD * md,int blocksize)880 int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
881 {
882 if (md->block_size != 0)
883 return 0;
884
885 md->block_size = blocksize;
886 return 1;
887 }
EVP_MD_meth_set_result_size(EVP_MD * md,int resultsize)888 int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
889 {
890 if (md->md_size != 0)
891 return 0;
892
893 md->md_size = resultsize;
894 return 1;
895 }
EVP_MD_meth_set_app_datasize(EVP_MD * md,int datasize)896 int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
897 {
898 if (md->ctx_size != 0)
899 return 0;
900
901 md->ctx_size = datasize;
902 return 1;
903 }
EVP_MD_meth_set_flags(EVP_MD * md,unsigned long flags)904 int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
905 {
906 if (md->flags != 0)
907 return 0;
908
909 md->flags = flags;
910 return 1;
911 }
EVP_MD_meth_set_init(EVP_MD * md,int (* init)(EVP_MD_CTX * ctx))912 int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
913 {
914 if (md->init != NULL)
915 return 0;
916
917 md->init = init;
918 return 1;
919 }
EVP_MD_meth_set_update(EVP_MD * md,int (* update)(EVP_MD_CTX * ctx,const void * data,size_t count))920 int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
921 const void *data,
922 size_t count))
923 {
924 if (md->update != NULL)
925 return 0;
926
927 md->update = update;
928 return 1;
929 }
EVP_MD_meth_set_final(EVP_MD * md,int (* final)(EVP_MD_CTX * ctx,unsigned char * md))930 int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
931 unsigned char *md))
932 {
933 if (md->final != NULL)
934 return 0;
935
936 md->final = final;
937 return 1;
938 }
EVP_MD_meth_set_copy(EVP_MD * md,int (* copy)(EVP_MD_CTX * to,const EVP_MD_CTX * from))939 int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
940 const EVP_MD_CTX *from))
941 {
942 if (md->copy != NULL)
943 return 0;
944
945 md->copy = copy;
946 return 1;
947 }
EVP_MD_meth_set_cleanup(EVP_MD * md,int (* cleanup)(EVP_MD_CTX * ctx))948 int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
949 {
950 if (md->cleanup != NULL)
951 return 0;
952
953 md->cleanup = cleanup;
954 return 1;
955 }
EVP_MD_meth_set_ctrl(EVP_MD * md,int (* ctrl)(EVP_MD_CTX * ctx,int cmd,int p1,void * p2))956 int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
957 int p1, void *p2))
958 {
959 if (md->md_ctrl != NULL)
960 return 0;
961
962 md->md_ctrl = ctrl;
963 return 1;
964 }
965
EVP_MD_meth_get_input_blocksize(const EVP_MD * md)966 int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
967 {
968 return md->block_size;
969 }
EVP_MD_meth_get_result_size(const EVP_MD * md)970 int EVP_MD_meth_get_result_size(const EVP_MD *md)
971 {
972 return md->md_size;
973 }
EVP_MD_meth_get_app_datasize(const EVP_MD * md)974 int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
975 {
976 return md->ctx_size;
977 }
EVP_MD_meth_get_flags(const EVP_MD * md)978 unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
979 {
980 return md->flags;
981 }
EVP_MD_meth_get_init(const EVP_MD * md)982 int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
983 {
984 return md->init;
985 }
EVP_MD_meth_get_update(const EVP_MD * md)986 int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
987 const void *data,
988 size_t count)
989 {
990 return md->update;
991 }
EVP_MD_meth_get_final(const EVP_MD * md)992 int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
993 unsigned char *md)
994 {
995 return md->final;
996 }
EVP_MD_meth_get_copy(const EVP_MD * md)997 int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
998 const EVP_MD_CTX *from)
999 {
1000 return md->copy;
1001 }
EVP_MD_meth_get_cleanup(const EVP_MD * md)1002 int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
1003 {
1004 return md->cleanup;
1005 }
EVP_MD_meth_get_ctrl(const EVP_MD * md)1006 int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
1007 int p1, void *p2)
1008 {
1009 return md->md_ctrl;
1010 }
1011
1012 #ifndef OPENSSL_NO_DEPRECATED_3_0
EVP_MD_CTX_md(const EVP_MD_CTX * ctx)1013 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
1014 {
1015 if (ctx == NULL)
1016 return NULL;
1017 return ctx->reqdigest;
1018 }
1019 #endif
1020
EVP_MD_CTX_get0_md(const EVP_MD_CTX * ctx)1021 const EVP_MD *EVP_MD_CTX_get0_md(const EVP_MD_CTX *ctx)
1022 {
1023 if (ctx == NULL)
1024 return NULL;
1025 return ctx->reqdigest;
1026 }
1027
EVP_MD_CTX_get1_md(EVP_MD_CTX * ctx)1028 EVP_MD *EVP_MD_CTX_get1_md(EVP_MD_CTX *ctx)
1029 {
1030 EVP_MD *md;
1031
1032 if (ctx == NULL)
1033 return NULL;
1034 md = (EVP_MD *)ctx->reqdigest;
1035 if (md == NULL || !EVP_MD_up_ref(md))
1036 return NULL;
1037 return md;
1038 }
1039
EVP_MD_CTX_get_pkey_ctx(const EVP_MD_CTX * ctx)1040 EVP_PKEY_CTX *EVP_MD_CTX_get_pkey_ctx(const EVP_MD_CTX *ctx)
1041 {
1042 return ctx->pctx;
1043 }
1044
1045 #if !defined(FIPS_MODULE)
EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX * ctx,EVP_PKEY_CTX * pctx)1046 void EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx)
1047 {
1048 /*
1049 * it's reasonable to set NULL pctx (a.k.a clear the ctx->pctx), so
1050 * we have to deal with the cleanup job here.
1051 */
1052 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
1053 EVP_PKEY_CTX_free(ctx->pctx);
1054
1055 ctx->pctx = pctx;
1056
1057 if (pctx != NULL) {
1058 /* make sure pctx is not freed when destroying EVP_MD_CTX */
1059 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
1060 } else {
1061 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
1062 }
1063 }
1064 #endif /* !defined(FIPS_MODULE) */
1065
EVP_MD_CTX_get0_md_data(const EVP_MD_CTX * ctx)1066 void *EVP_MD_CTX_get0_md_data(const EVP_MD_CTX *ctx)
1067 {
1068 return ctx->md_data;
1069 }
1070
EVP_MD_CTX_update_fn(EVP_MD_CTX * ctx)1071 int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
1072 const void *data, size_t count)
1073 {
1074 return ctx->update;
1075 }
1076
EVP_MD_CTX_set_update_fn(EVP_MD_CTX * ctx,int (* update)(EVP_MD_CTX * ctx,const void * data,size_t count))1077 void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
1078 int (*update) (EVP_MD_CTX *ctx,
1079 const void *data, size_t count))
1080 {
1081 ctx->update = update;
1082 }
1083
EVP_MD_CTX_set_flags(EVP_MD_CTX * ctx,int flags)1084 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
1085 {
1086 ctx->flags |= flags;
1087 }
1088
EVP_MD_CTX_clear_flags(EVP_MD_CTX * ctx,int flags)1089 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
1090 {
1091 ctx->flags &= ~flags;
1092 }
1093
EVP_MD_CTX_test_flags(const EVP_MD_CTX * ctx,int flags)1094 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
1095 {
1096 return (ctx->flags & flags);
1097 }
1098
evp_cipher_ctx_enable_use_bits(EVP_CIPHER_CTX * ctx,unsigned int enable)1099 static int evp_cipher_ctx_enable_use_bits(EVP_CIPHER_CTX *ctx,
1100 unsigned int enable)
1101 {
1102 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
1103
1104 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_USE_BITS, &enable);
1105 return EVP_CIPHER_CTX_set_params(ctx, params);
1106 }
1107
EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX * ctx,int flags)1108 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
1109 {
1110 int oldflags = ctx->flags;
1111
1112 ctx->flags |= flags;
1113 if (((oldflags ^ ctx->flags) & EVP_CIPH_FLAG_LENGTH_BITS) != 0)
1114 evp_cipher_ctx_enable_use_bits(ctx, 1);
1115 }
1116
EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX * ctx,int flags)1117 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
1118 {
1119 int oldflags = ctx->flags;
1120
1121 ctx->flags &= ~flags;
1122 if (((oldflags ^ ctx->flags) & EVP_CIPH_FLAG_LENGTH_BITS) != 0)
1123 evp_cipher_ctx_enable_use_bits(ctx, 0);
1124 }
1125
EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX * ctx,int flags)1126 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
1127 {
1128 return (ctx->flags & flags);
1129 }
1130
1131 #if !defined(FIPS_MODULE)
1132
EVP_PKEY_CTX_set_group_name(EVP_PKEY_CTX * ctx,const char * name)1133 int EVP_PKEY_CTX_set_group_name(EVP_PKEY_CTX *ctx, const char *name)
1134 {
1135 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
1136
1137 if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
1138 ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1139 /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1140 return -2;
1141 }
1142
1143 if (name == NULL)
1144 return -1;
1145
1146 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
1147 (char *)name, 0);
1148 return EVP_PKEY_CTX_set_params(ctx, params);
1149 }
1150
EVP_PKEY_CTX_get_group_name(EVP_PKEY_CTX * ctx,char * name,size_t namelen)1151 int EVP_PKEY_CTX_get_group_name(EVP_PKEY_CTX *ctx, char *name, size_t namelen)
1152 {
1153 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
1154 OSSL_PARAM *p = params;
1155
1156 if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
1157 /* There is no legacy support for this */
1158 ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1159 /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1160 return -2;
1161 }
1162
1163 if (name == NULL)
1164 return -1;
1165
1166 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
1167 name, namelen);
1168 if (!EVP_PKEY_CTX_get_params(ctx, params))
1169 return -1;
1170 return 1;
1171 }
1172
1173 /*
1174 * evp_pkey_keygen() abstracts from the explicit use of B<EVP_PKEY_CTX>
1175 * while providing a generic way of generating a new asymmetric key pair
1176 * of algorithm type I<name> (e.g., C<RSA> or C<EC>).
1177 * The library context I<libctx> and property query I<propq>
1178 * are used when fetching algorithms from providers.
1179 * The I<params> specify algorithm-specific parameters
1180 * such as the RSA modulus size or the name of an EC curve.
1181 */
evp_pkey_keygen(OSSL_LIB_CTX * libctx,const char * name,const char * propq,const OSSL_PARAM * params)1182 static EVP_PKEY *evp_pkey_keygen(OSSL_LIB_CTX *libctx, const char *name,
1183 const char *propq, const OSSL_PARAM *params)
1184 {
1185 EVP_PKEY *pkey = NULL;
1186 EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_name(libctx, name, propq);
1187
1188 if (ctx != NULL
1189 && EVP_PKEY_keygen_init(ctx) > 0
1190 && EVP_PKEY_CTX_set_params(ctx, params))
1191 (void)EVP_PKEY_generate(ctx, &pkey);
1192
1193 EVP_PKEY_CTX_free(ctx);
1194 return pkey;
1195 }
1196
EVP_PKEY_Q_keygen(OSSL_LIB_CTX * libctx,const char * propq,const char * type,...)1197 EVP_PKEY *EVP_PKEY_Q_keygen(OSSL_LIB_CTX *libctx, const char *propq,
1198 const char *type, ...)
1199 {
1200 va_list args;
1201 size_t bits;
1202 char *name;
1203 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
1204 EVP_PKEY *ret = NULL;
1205
1206 va_start(args, type);
1207
1208 if (OPENSSL_strcasecmp(type, "RSA") == 0) {
1209 bits = va_arg(args, size_t);
1210 params[0] = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_RSA_BITS, &bits);
1211 } else if (OPENSSL_strcasecmp(type, "EC") == 0) {
1212 name = va_arg(args, char *);
1213 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
1214 name, 0);
1215 } else if (OPENSSL_strcasecmp(type, "ED25519") != 0
1216 && OPENSSL_strcasecmp(type, "X25519") != 0
1217 && OPENSSL_strcasecmp(type, "ED448") != 0
1218 && OPENSSL_strcasecmp(type, "X448") != 0) {
1219 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_INVALID_ARGUMENT);
1220 goto end;
1221 }
1222 ret = evp_pkey_keygen(libctx, type, propq, params);
1223
1224 end:
1225 va_end(args);
1226 return ret;
1227 }
1228
1229 #endif /* !defined(FIPS_MODULE) */
1230