1/*
2 * Copyright 1995-2018 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#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/evp.h>
13#include <openssl/objects.h>
14#include <openssl/params.h>
15#include <openssl/core_names.h>
16#include <openssl/dh.h>
17#include "crypto/evp.h"
18#include "internal/provider.h"
19#include "evp_local.h"
20
21#if !defined(FIPS_MODE)
22int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
23{
24 int ret = -1; /* Assume the worst */
25 const EVP_CIPHER *cipher = c->cipher;
26
27 /*
28 * For legacy implementations, we detect custom AlgorithmIdentifier
29 * parameter handling by checking if the function pointer
30 * cipher->set_asn1_parameters is set. We know that this pointer
31 * is NULL for provided implementations.
32 *
33 * Otherwise, for any implementation, we check the flag
34 * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
35 * default AI parameter extraction.
36 *
37 * Otherwise, for provided implementations, we convert |type| to
38 * a DER encoded blob and pass to the implementation in OSSL_PARAM
39 * form.
40 *
41 * If none of the above applies, this operation is unsupported.
42 */
43 if (cipher->set_asn1_parameters != NULL) {
44 ret = cipher->set_asn1_parameters(c, type);
45 } else if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
46 switch (EVP_CIPHER_mode(cipher)) {
47 case EVP_CIPH_WRAP_MODE:
48 if (EVP_CIPHER_is_a(cipher, SN_id_smime_alg_CMS3DESwrap))
49 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
50 ret = 1;
51 break;
52
53 case EVP_CIPH_GCM_MODE:
54 case EVP_CIPH_CCM_MODE:
55 case EVP_CIPH_XTS_MODE:
56 case EVP_CIPH_OCB_MODE:
57 ret = -2;
58 break;
59
60 default:
61 ret = EVP_CIPHER_set_asn1_iv(c, type);
62 }
63 } else if (cipher->prov != NULL) {
64 OSSL_PARAM params[3], *p = params;
65 unsigned char *der = NULL, *derp;
66
67 /*
68 * We make two passes, the first to get the appropriate buffer size,
69 * and the second to get the actual value.
70 */
71 *p++ = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_ALG_ID,
72 NULL, 0);
73 *p = OSSL_PARAM_construct_end();
74
75 if (!EVP_CIPHER_CTX_get_params(c, params))
76 goto err;
77
78 /* ... but, we should get a return size too! */
79 if (params[0].return_size != 0
80 && (der = OPENSSL_malloc(params[0].return_size)) != NULL) {
81 params[0].data = der;
82 params[0].data_size = params[0].return_size;
83 params[0].return_size = 0;
84 derp = der;
85 if (EVP_CIPHER_CTX_get_params(c, params)
86 && d2i_ASN1_TYPE(&type, (const unsigned char **)&derp,
87 params[0].return_size) != NULL) {
88 ret = 1;
89 }
90 OPENSSL_free(der);
91 }
92 } else {
93 ret = -2;
94 }
95
96 err:
97 if (ret == -2)
98 EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ASN1_R_UNSUPPORTED_CIPHER);
99 else if (ret <= 0)
100 EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, EVP_R_CIPHER_PARAMETER_ERROR);
101 if (ret < -1)
102 ret = -1;
103 return ret;
104}
105
106int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
107{
108 int ret = -1; /* Assume the worst */
109 const EVP_CIPHER *cipher = c->cipher;
110
111 /*
112 * For legacy implementations, we detect custom AlgorithmIdentifier
113 * parameter handling by checking if there the function pointer
114 * cipher->get_asn1_parameters is set. We know that this pointer
115 * is NULL for provided implementations.
116 *
117 * Otherwise, for any implementation, we check the flag
118 * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
119 * default AI parameter creation.
120 *
121 * Otherwise, for provided implementations, we get the AI parameter
122 * in DER encoded form from the implementation by requesting the
123 * appropriate OSSL_PARAM and converting the result to a ASN1_TYPE.
124 *
125 * If none of the above applies, this operation is unsupported.
126 */
127 if (cipher->get_asn1_parameters != NULL) {
128 ret = cipher->get_asn1_parameters(c, type);
129 } else if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
130 switch (EVP_CIPHER_mode(cipher)) {
131 case EVP_CIPH_WRAP_MODE:
132 ret = 1;
133 break;
134
135 case EVP_CIPH_GCM_MODE:
136 case EVP_CIPH_CCM_MODE:
137 case EVP_CIPH_XTS_MODE:
138 case EVP_CIPH_OCB_MODE:
139 ret = -2;
140 break;
141
142 default:
143 ret = EVP_CIPHER_get_asn1_iv(c, type);
144 }
145 } else if (cipher->prov != NULL) {
146 OSSL_PARAM params[3], *p = params;
147 unsigned char *der = NULL;
148 int derl = -1;
149
150 if ((derl = i2d_ASN1_TYPE(type, &der)) >= 0) {
151 *p++ =
152 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_ALG_ID,
153 der, (size_t)derl);
154 *p = OSSL_PARAM_construct_end();
155 if (EVP_CIPHER_CTX_set_params(c, params))
156 ret = 1;
157 OPENSSL_free(der);
158 }
159 } else {
160 ret = -2;
161 }
162
163 if (ret == -2)
164 EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, EVP_R_UNSUPPORTED_CIPHER);
165 else if (ret <= 0)
166 EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, EVP_R_CIPHER_PARAMETER_ERROR);
167 if (ret < -1)
168 ret = -1;
169 return ret;
170}
171
172int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *ctx, ASN1_TYPE *type)
173{
174 int i = 0;
175 unsigned int l;
176
177 if (type != NULL) {
178 unsigned char iv[EVP_MAX_IV_LENGTH];
179
180 l = EVP_CIPHER_CTX_iv_length(ctx);
181 if (!ossl_assert(l <= sizeof(iv)))
182 return -1;
183 i = ASN1_TYPE_get_octetstring(type, iv, l);
184 if (i != (int)l)
185 return -1;
186
187 if (!EVP_CipherInit_ex(ctx, NULL, NULL, NULL, iv, -1))
188 return -1;
189 }
190 return i;
191}
192
193int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
194{
195 int i = 0;
196 unsigned int j;
197 unsigned char *oiv = NULL;
198
199 if (type != NULL) {
200 oiv = (unsigned char *)EVP_CIPHER_CTX_original_iv(c);
201 j = EVP_CIPHER_CTX_iv_length(c);
202 OPENSSL_assert(j <= sizeof(c->iv));
203 i = ASN1_TYPE_set_octetstring(type, oiv, j);
204 }
205 return i;
206}
207#endif /* !defined(FIPS_MODE) */
208
209/* Convert the various cipher NIDs and dummies to a proper OID NID */
210int EVP_CIPHER_type(const EVP_CIPHER *ctx)
211{
212 int nid;
213 nid = EVP_CIPHER_nid(ctx);
214
215 switch (nid) {
216
217 case NID_rc2_cbc:
218 case NID_rc2_64_cbc:
219 case NID_rc2_40_cbc:
220
221 return NID_rc2_cbc;
222
223 case NID_rc4:
224 case NID_rc4_40:
225
226 return NID_rc4;
227
228 case NID_aes_128_cfb128:
229 case NID_aes_128_cfb8:
230 case NID_aes_128_cfb1:
231
232 return NID_aes_128_cfb128;
233
234 case NID_aes_192_cfb128:
235 case NID_aes_192_cfb8:
236 case NID_aes_192_cfb1:
237
238 return NID_aes_192_cfb128;
239
240 case NID_aes_256_cfb128:
241 case NID_aes_256_cfb8:
242 case NID_aes_256_cfb1:
243
244 return NID_aes_256_cfb128;
245
246 case NID_des_cfb64:
247 case NID_des_cfb8:
248 case NID_des_cfb1:
249
250 return NID_des_cfb64;
251
252 case NID_des_ede3_cfb64:
253 case NID_des_ede3_cfb8:
254 case NID_des_ede3_cfb1:
255
256 return NID_des_cfb64;
257
258 default:
259#ifdef FIPS_MODE
260 return NID_undef;
261#else
262 {
263 /* Check it has an OID and it is valid */
264 ASN1_OBJECT *otmp = OBJ_nid2obj(nid);
265
266 if (OBJ_get0_data(otmp) == NULL)
267 nid = NID_undef;
268 ASN1_OBJECT_free(otmp);
269 return nid;
270 }
271#endif
272 }
273}
274
275int evp_cipher_cache_constants(EVP_CIPHER *cipher)
276{
277 int ok;
278 size_t ivlen = 0;
279 size_t blksz = 0;
280 size_t keylen = 0;
281 unsigned int mode = 0;
282 unsigned long flags = 0;
283 OSSL_PARAM params[6];
284
285 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_BLOCK_SIZE, &blksz);
286 params[1] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &ivlen);
287 params[2] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &keylen);
288 params[3] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_MODE, &mode);
289 params[4] = OSSL_PARAM_construct_ulong(OSSL_CIPHER_PARAM_FLAGS, &flags);
290 params[5] = OSSL_PARAM_construct_end();
291 ok = evp_do_ciph_getparams(cipher, params);
292 if (ok) {
293 /* Provided implementations may have a custom cipher_cipher */
294 if (cipher->prov != NULL && cipher->ccipher != NULL)
295 flags |= EVP_CIPH_FLAG_CUSTOM_CIPHER;
296 cipher->block_size = blksz;
297 cipher->iv_len = ivlen;
298 cipher->key_len = keylen;
299 cipher->flags = flags | mode;
300 }
301 return ok;
302}
303
304int EVP_CIPHER_block_size(const EVP_CIPHER *cipher)
305{
306 return cipher->block_size;
307}
308
309int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
310{
311 return EVP_CIPHER_block_size(ctx->cipher);
312}
313
314int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e)
315{
316 return e->ctx_size;
317}
318
319int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
320 const unsigned char *in, unsigned int inl)
321{
322 if (ctx->cipher->prov != NULL) {
323 /*
324 * If the provided implementation has a ccipher function, we use it,
325 * and translate its return value like this: 0 => -1, 1 => outlen
326 *
327 * Otherwise, we call the cupdate function if in != NULL, or cfinal
328 * if in == NULL. Regardless of which, we return what we got.
329 */
330 int ret = -1;
331 size_t outl = 0;
332 size_t blocksize = EVP_CIPHER_CTX_block_size(ctx);
333
334 if (ctx->cipher->ccipher != NULL)
335 ret = ctx->cipher->ccipher(ctx->provctx, out, &outl,
336 inl + (blocksize == 1 ? 0 : blocksize),
337 in, (size_t)inl)
338 ? (int)outl : -1;
339 else if (in != NULL)
340 ret = ctx->cipher->cupdate(ctx->provctx, out, &outl,
341 inl + (blocksize == 1 ? 0 : blocksize),
342 in, (size_t)inl);
343 else
344 ret = ctx->cipher->cfinal(ctx->provctx, out, &outl,
345 blocksize == 1 ? 0 : blocksize);
346
347 return ret;
348 }
349
350 return ctx->cipher->do_cipher(ctx, out, in, inl);
351}
352
353const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
354{
355 return ctx->cipher;
356}
357
358int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
359{
360 return ctx->encrypt;
361}
362
363unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
364{
365 return cipher->flags;
366}
367
368void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
369{
370 return ctx->app_data;
371}
372
373void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
374{
375 ctx->app_data = data;
376}
377
378void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx)
379{
380 return ctx->cipher_data;
381}
382
383void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data)
384{
385 void *old_cipher_data;
386
387 old_cipher_data = ctx->cipher_data;
388 ctx->cipher_data = cipher_data;
389
390 return old_cipher_data;
391}
392
393int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
394{
395 return cipher->iv_len;
396}
397
398int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
399{
400 int rv, len = EVP_CIPHER_iv_length(ctx->cipher);
401 size_t v = len;
402 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
403
404 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &v);
405 rv = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
406 if (rv == EVP_CTRL_RET_UNSUPPORTED)
407 goto legacy;
408 return rv != 0 ? (int)v : -1;
409 /* TODO (3.0) Remove legacy support */
410legacy:
411 if ((EVP_CIPHER_flags(ctx->cipher) & EVP_CIPH_CUSTOM_IV_LENGTH) != 0) {
412 rv = EVP_CIPHER_CTX_ctrl((EVP_CIPHER_CTX *)ctx, EVP_CTRL_GET_IVLEN,
413 0, &len);
414 return (rv == 1) ? len : -1;
415 }
416 return len;
417}
418
419int EVP_CIPHER_CTX_tag_length(const EVP_CIPHER_CTX *ctx)
420{
421 int ret;
422 size_t v = 0;
423 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
424
425 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, &v);
426 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
427 return ret == 1 ? (int)v : 0;
428}
429
430const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
431{
432 int ok;
433 const unsigned char *v = ctx->oiv;
434 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
435
436 params[0] =
437 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV,
438 (void **)&v, sizeof(ctx->oiv));
439 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
440
441 return ok != 0 ? v : NULL;
442}
443
444/*
445 * OSSL_PARAM_OCTET_PTR gets us the pointer to the running IV in the provider
446 */
447const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
448{
449 int ok;
450 const unsigned char *v = ctx->iv;
451 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
452
453 params[0] =
454 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV, (void **)&v,
455 sizeof(ctx->iv));
456 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
457
458 return ok != 0 ? v : NULL;
459}
460
461unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
462{
463 int ok;
464 unsigned char *v = ctx->iv;
465 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
466
467 params[0] =
468 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV, (void **)&v,
469 sizeof(ctx->iv));
470 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
471
472 return ok != 0 ? v : NULL;
473}
474
475unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
476{
477 return ctx->buf;
478}
479
480int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx)
481{
482 int ok;
483 unsigned int v = (unsigned int)ctx->num;
484 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
485
486 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &v);
487 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
488
489 return ok != 0 ? (int)v : EVP_CTRL_RET_UNSUPPORTED;
490}
491
492int EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
493{
494 int ok;
495 unsigned int n = (unsigned int)num;
496 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
497
498 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &n);
499 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
500
501 if (ok != 0)
502 ctx->num = (int)n;
503 return ok != 0;
504}
505
506int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
507{
508 return cipher->key_len;
509}
510
511int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
512{
513 int ok;
514 size_t v = ctx->key_len;
515 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
516
517 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &v);
518 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
519
520 return ok != 0 ? (int)v : EVP_CTRL_RET_UNSUPPORTED;
521}
522
523int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
524{
525 return cipher->nid;
526}
527
528int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
529{
530 return ctx->cipher->nid;
531}
532
533int EVP_CIPHER_is_a(const EVP_CIPHER *cipher, const char *name)
534{
535#ifndef FIPS_MODE
536 if (cipher->prov == NULL) {
537 int nid = EVP_CIPHER_nid(cipher);
538
539 return nid == OBJ_sn2nid(name) || nid == OBJ_ln2nid(name);
540 }
541#endif
542 return evp_is_a(cipher->prov, cipher->name_id, name);
543}
544
545int EVP_CIPHER_number(const EVP_CIPHER *cipher)
546{
547 return cipher->name_id;
548}
549
550const char *EVP_CIPHER_name(const EVP_CIPHER *cipher)
551{
552 if (cipher->prov != NULL)
553 return evp_first_name(cipher->prov, cipher->name_id);
554#ifndef FIPS_MODE
555 return OBJ_nid2sn(EVP_CIPHER_nid(cipher));
556#else
557 return NULL;
558#endif
559}
560
561void EVP_CIPHER_names_do_all(const EVP_CIPHER *cipher,
562 void (*fn)(const char *name, void *data),
563 void *data)
564{
565 if (cipher->prov != NULL)
566 evp_names_do_all(cipher->prov, cipher->name_id, fn, data);
567}
568
569const OSSL_PROVIDER *EVP_CIPHER_provider(const EVP_CIPHER *cipher)
570{
571 return cipher->prov;
572}
573
574int EVP_CIPHER_mode(const EVP_CIPHER *cipher)
575{
576 return EVP_CIPHER_flags(cipher) & EVP_CIPH_MODE;
577}
578
579int EVP_MD_is_a(const EVP_MD *md, const char *name)
580{
581 return evp_is_a(md->prov, md->name_id, name);
582}
583
584int EVP_MD_number(const EVP_MD *md)
585{
586 return md->name_id;
587}
588
589const char *EVP_MD_name(const EVP_MD *md)
590{
591 if (md->prov != NULL)
592 return evp_first_name(md->prov, md->name_id);
593#ifndef FIPS_MODE
594 return OBJ_nid2sn(EVP_MD_nid(md));
595#else
596 return NULL;
597#endif
598}
599
600void EVP_MD_names_do_all(const EVP_MD *md,
601 void (*fn)(const char *name, void *data),
602 void *data)
603{
604 if (md->prov != NULL)
605 evp_names_do_all(md->prov, md->name_id, fn, data);
606}
607
608const OSSL_PROVIDER *EVP_MD_provider(const EVP_MD *md)
609{
610 return md->prov;
611}
612
613int EVP_MD_block_size(const EVP_MD *md)
614{
615 int ok;
616 size_t v = md->block_size;
617 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
618
619 if (md == NULL) {
620 EVPerr(EVP_F_EVP_MD_BLOCK_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
621 return -1;
622 }
623
624 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_BLOCK_SIZE, &v);
625 ok = evp_do_md_getparams(md, params);
626
627 return ok != 0 ? (int)v : -1;
628}
629
630int EVP_MD_type(const EVP_MD *md)
631{
632 return md->type;
633}
634
635int EVP_MD_pkey_type(const EVP_MD *md)
636{
637 return md->pkey_type;
638}
639
640int EVP_MD_size(const EVP_MD *md)
641{
642 int ok;
643 size_t v = md->md_size;
644 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
645
646 if (md == NULL) {
647 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
648 return -1;
649 }
650
651 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_SIZE, &v);
652 ok = evp_do_md_getparams(md, params);
653
654 return ok != 0 ? (int)v : -1;
655}
656
657unsigned long EVP_MD_flags(const EVP_MD *md)
658{
659 int ok;
660 unsigned long v = md->flags;
661 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
662
663 params[0] = OSSL_PARAM_construct_ulong(OSSL_CIPHER_PARAM_FLAGS, &v);
664 ok = evp_do_md_getparams(md, params);
665
666 return ok != 0 ? v : 0;
667}
668
669EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
670{
671 EVP_MD *md = evp_md_new();
672
673 if (md != NULL) {
674 md->type = md_type;
675 md->pkey_type = pkey_type;
676 }
677 return md;
678}
679
680EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
681{
682 EVP_MD *to = NULL;
683
684 /*
685 * Non-legacy EVP_MDs can't be duplicated like this.
686 * Use EVP_MD_up_ref() instead.
687 */
688 if (md->prov != NULL)
689 return NULL;
690
691 if ((to = EVP_MD_meth_new(md->type, md->pkey_type)) != NULL) {
692 CRYPTO_RWLOCK *lock = to->lock;
693
694 memcpy(to, md, sizeof(*to));
695 to->lock = lock;
696 }
697 return to;
698}
699
700void EVP_MD_meth_free(EVP_MD *md)
701{
702 EVP_MD_free(md);
703}
704int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
705{
706 if (md->block_size != 0)
707 return 0;
708
709 md->block_size = blocksize;
710 return 1;
711}
712int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
713{
714 if (md->md_size != 0)
715 return 0;
716
717 md->md_size = resultsize;
718 return 1;
719}
720int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
721{
722 if (md->ctx_size != 0)
723 return 0;
724
725 md->ctx_size = datasize;
726 return 1;
727}
728int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
729{
730 if (md->flags != 0)
731 return 0;
732
733 md->flags = flags;
734 return 1;
735}
736int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
737{
738 if (md->init != NULL)
739 return 0;
740
741 md->init = init;
742 return 1;
743}
744int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
745 const void *data,
746 size_t count))
747{
748 if (md->update != NULL)
749 return 0;
750
751 md->update = update;
752 return 1;
753}
754int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
755 unsigned char *md))
756{
757 if (md->final != NULL)
758 return 0;
759
760 md->final = final;
761 return 1;
762}
763int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
764 const EVP_MD_CTX *from))
765{
766 if (md->copy != NULL)
767 return 0;
768
769 md->copy = copy;
770 return 1;
771}
772int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
773{
774 if (md->cleanup != NULL)
775 return 0;
776
777 md->cleanup = cleanup;
778 return 1;
779}
780int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
781 int p1, void *p2))
782{
783 if (md->md_ctrl != NULL)
784 return 0;
785
786 md->md_ctrl = ctrl;
787 return 1;
788}
789
790int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
791{
792 return md->block_size;
793}
794int EVP_MD_meth_get_result_size(const EVP_MD *md)
795{
796 return md->md_size;
797}
798int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
799{
800 return md->ctx_size;
801}
802unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
803{
804 return md->flags;
805}
806int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
807{
808 return md->init;
809}
810int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
811 const void *data,
812 size_t count)
813{
814 return md->update;
815}
816int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
817 unsigned char *md)
818{
819 return md->final;
820}
821int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
822 const EVP_MD_CTX *from)
823{
824 return md->copy;
825}
826int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
827{
828 return md->cleanup;
829}
830int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
831 int p1, void *p2)
832{
833 return md->md_ctrl;
834}
835
836const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
837{
838 if (ctx == NULL)
839 return NULL;
840 return ctx->reqdigest;
841}
842
843EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
844{
845 return ctx->pctx;
846}
847
848#if !defined(FIPS_MODE)
849/* TODO(3.0): EVP_DigestSign* not yet supported in FIPS module */
850void EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx)
851{
852 /*
853 * it's reasonable to set NULL pctx (a.k.a clear the ctx->pctx), so
854 * we have to deal with the cleanup job here.
855 */
856 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
857 EVP_PKEY_CTX_free(ctx->pctx);
858
859 ctx->pctx = pctx;
860
861 if (pctx != NULL) {
862 /* make sure pctx is not freed when destroying EVP_MD_CTX */
863 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
864 } else {
865 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
866 }
867}
868#endif /* !defined(FIPS_MODE) */
869
870void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
871{
872 return ctx->md_data;
873}
874
875int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
876 const void *data, size_t count)
877{
878 return ctx->update;
879}
880
881void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
882 int (*update) (EVP_MD_CTX *ctx,
883 const void *data, size_t count))
884{
885 ctx->update = update;
886}
887
888void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
889{
890 ctx->flags |= flags;
891}
892
893void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
894{
895 ctx->flags &= ~flags;
896}
897
898int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
899{
900 return (ctx->flags & flags);
901}
902
903void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
904{
905 ctx->flags |= flags;
906}
907
908void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
909{
910 ctx->flags &= ~flags;
911}
912
913int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
914{
915 return (ctx->flags & flags);
916}
917
918int EVP_str2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
919 void *ctx, int cmd, const char *value)
920{
921 size_t len;
922
923 len = strlen(value);
924 if (len > INT_MAX)
925 return -1;
926 return cb(ctx, cmd, (void *)value, len);
927}
928
929int EVP_hex2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
930 void *ctx, int cmd, const char *hex)
931{
932 unsigned char *bin;
933 long binlen;
934 int rv = -1;
935
936 bin = OPENSSL_hexstr2buf(hex, &binlen);
937 if (bin == NULL)
938 return 0;
939 if (binlen <= INT_MAX)
940 rv = cb(ctx, cmd, bin, binlen);
941 OPENSSL_free(bin);
942 return rv;
943}
944