1 /* crypto/rsa/rsa_pmeth.c */
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/asn1t.h>
63 #include <openssl/x509.h>
64 #include <openssl/rsa.h>
65 #include <openssl/bn.h>
66 #include <openssl/evp.h>
67 #include <openssl/x509v3.h>
68 #ifndef OPENSSL_NO_CMS
69 # include <openssl/cms.h>
71 #include "internal/evp_int.h"
74 /* RSA pkey context structure */
77 /* Key gen parameters */
80 /* Keygen callback info */
82 /* RSA padding mode */
86 /* message digest for MGF1 */
93 unsigned char *oaep_label
;
97 static int pkey_rsa_init(EVP_PKEY_CTX
*ctx
)
100 rctx
= OPENSSL_malloc(sizeof(*rctx
));
104 rctx
->pub_exp
= NULL
;
105 rctx
->pad_mode
= RSA_PKCS1_PADDING
;
112 rctx
->oaep_label
= NULL
;
113 rctx
->oaep_labellen
= 0;
116 ctx
->keygen_info
= rctx
->gentmp
;
117 ctx
->keygen_info_count
= 2;
122 static int pkey_rsa_copy(EVP_PKEY_CTX
*dst
, EVP_PKEY_CTX
*src
)
124 RSA_PKEY_CTX
*dctx
, *sctx
;
125 if (!pkey_rsa_init(dst
))
129 dctx
->nbits
= sctx
->nbits
;
131 dctx
->pub_exp
= BN_dup(sctx
->pub_exp
);
135 dctx
->pad_mode
= sctx
->pad_mode
;
137 dctx
->mgf1md
= sctx
->mgf1md
;
138 if (sctx
->oaep_label
) {
139 OPENSSL_free(dctx
->oaep_label
);
140 dctx
->oaep_label
= BUF_memdup(sctx
->oaep_label
, sctx
->oaep_labellen
);
141 if (!dctx
->oaep_label
)
143 dctx
->oaep_labellen
= sctx
->oaep_labellen
;
148 static int setup_tbuf(RSA_PKEY_CTX
*ctx
, EVP_PKEY_CTX
*pk
)
152 ctx
->tbuf
= OPENSSL_malloc(EVP_PKEY_size(pk
->pkey
));
158 static void pkey_rsa_cleanup(EVP_PKEY_CTX
*ctx
)
160 RSA_PKEY_CTX
*rctx
= ctx
->data
;
162 BN_free(rctx
->pub_exp
);
163 OPENSSL_free(rctx
->tbuf
);
164 OPENSSL_free(rctx
->oaep_label
);
169 static int pkey_rsa_sign(EVP_PKEY_CTX
*ctx
, unsigned char *sig
,
170 size_t *siglen
, const unsigned char *tbs
,
174 RSA_PKEY_CTX
*rctx
= ctx
->data
;
175 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
178 if (tbslen
!= (size_t)EVP_MD_size(rctx
->md
)) {
179 RSAerr(RSA_F_PKEY_RSA_SIGN
, RSA_R_INVALID_DIGEST_LENGTH
);
183 if (EVP_MD_type(rctx
->md
) == NID_mdc2
) {
185 if (rctx
->pad_mode
!= RSA_PKCS1_PADDING
)
187 ret
= RSA_sign_ASN1_OCTET_STRING(NID_mdc2
,
188 tbs
, tbslen
, sig
, &sltmp
, rsa
);
193 } else if (rctx
->pad_mode
== RSA_X931_PADDING
) {
194 if ((size_t)EVP_PKEY_size(ctx
->pkey
) < tbslen
+ 1) {
195 RSAerr(RSA_F_PKEY_RSA_SIGN
, RSA_R_KEY_SIZE_TOO_SMALL
);
198 if (!setup_tbuf(rctx
, ctx
)) {
199 RSAerr(RSA_F_PKEY_RSA_SIGN
, ERR_R_MALLOC_FAILURE
);
202 memcpy(rctx
->tbuf
, tbs
, tbslen
);
203 rctx
->tbuf
[tbslen
] = RSA_X931_hash_id(EVP_MD_type(rctx
->md
));
204 ret
= RSA_private_encrypt(tbslen
+ 1, rctx
->tbuf
,
205 sig
, rsa
, RSA_X931_PADDING
);
206 } else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
) {
208 ret
= RSA_sign(EVP_MD_type(rctx
->md
),
209 tbs
, tbslen
, sig
, &sltmp
, rsa
);
213 } else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
) {
214 if (!setup_tbuf(rctx
, ctx
))
216 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa
,
218 rctx
->md
, rctx
->mgf1md
,
221 ret
= RSA_private_encrypt(RSA_size(rsa
), rctx
->tbuf
,
222 sig
, rsa
, RSA_NO_PADDING
);
226 ret
= RSA_private_encrypt(tbslen
, tbs
, sig
, ctx
->pkey
->pkey
.rsa
,
234 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX
*ctx
,
235 unsigned char *rout
, size_t *routlen
,
236 const unsigned char *sig
, size_t siglen
)
239 RSA_PKEY_CTX
*rctx
= ctx
->data
;
242 if (rctx
->pad_mode
== RSA_X931_PADDING
) {
243 if (!setup_tbuf(rctx
, ctx
))
245 ret
= RSA_public_decrypt(siglen
, sig
,
246 rctx
->tbuf
, ctx
->pkey
->pkey
.rsa
,
251 if (rctx
->tbuf
[ret
] != RSA_X931_hash_id(EVP_MD_type(rctx
->md
))) {
252 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
253 RSA_R_ALGORITHM_MISMATCH
);
256 if (ret
!= EVP_MD_size(rctx
->md
)) {
257 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
258 RSA_R_INVALID_DIGEST_LENGTH
);
262 memcpy(rout
, rctx
->tbuf
, ret
);
263 } else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
) {
265 ret
= int_rsa_verify(EVP_MD_type(rctx
->md
),
266 NULL
, 0, rout
, &sltmp
,
267 sig
, siglen
, ctx
->pkey
->pkey
.rsa
);
274 ret
= RSA_public_decrypt(siglen
, sig
, rout
, ctx
->pkey
->pkey
.rsa
,
282 static int pkey_rsa_verify(EVP_PKEY_CTX
*ctx
,
283 const unsigned char *sig
, size_t siglen
,
284 const unsigned char *tbs
, size_t tbslen
)
286 RSA_PKEY_CTX
*rctx
= ctx
->data
;
287 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
290 if (rctx
->pad_mode
== RSA_PKCS1_PADDING
)
291 return RSA_verify(EVP_MD_type(rctx
->md
), tbs
, tbslen
,
293 if (rctx
->pad_mode
== RSA_X931_PADDING
) {
294 if (pkey_rsa_verifyrecover(ctx
, NULL
, &rslen
, sig
, siglen
) <= 0)
296 } else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
) {
298 if (!setup_tbuf(rctx
, ctx
))
300 ret
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
301 rsa
, RSA_NO_PADDING
);
304 ret
= RSA_verify_PKCS1_PSS_mgf1(rsa
, tbs
,
305 rctx
->md
, rctx
->mgf1md
,
306 rctx
->tbuf
, rctx
->saltlen
);
313 if (!setup_tbuf(rctx
, ctx
))
315 rslen
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
316 rsa
, rctx
->pad_mode
);
321 if ((rslen
!= tbslen
) || memcmp(tbs
, rctx
->tbuf
, rslen
))
328 static int pkey_rsa_encrypt(EVP_PKEY_CTX
*ctx
,
329 unsigned char *out
, size_t *outlen
,
330 const unsigned char *in
, size_t inlen
)
333 RSA_PKEY_CTX
*rctx
= ctx
->data
;
334 if (rctx
->pad_mode
== RSA_PKCS1_OAEP_PADDING
) {
335 int klen
= RSA_size(ctx
->pkey
->pkey
.rsa
);
336 if (!setup_tbuf(rctx
, ctx
))
338 if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx
->tbuf
, klen
,
342 rctx
->md
, rctx
->mgf1md
))
344 ret
= RSA_public_encrypt(klen
, rctx
->tbuf
, out
,
345 ctx
->pkey
->pkey
.rsa
, RSA_NO_PADDING
);
347 ret
= RSA_public_encrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
355 static int pkey_rsa_decrypt(EVP_PKEY_CTX
*ctx
,
356 unsigned char *out
, size_t *outlen
,
357 const unsigned char *in
, size_t inlen
)
360 RSA_PKEY_CTX
*rctx
= ctx
->data
;
361 if (rctx
->pad_mode
== RSA_PKCS1_OAEP_PADDING
) {
363 if (!setup_tbuf(rctx
, ctx
))
365 ret
= RSA_private_decrypt(inlen
, in
, rctx
->tbuf
,
366 ctx
->pkey
->pkey
.rsa
, RSA_NO_PADDING
);
369 for (i
= 0; i
< ret
; i
++) {
373 ret
= RSA_padding_check_PKCS1_OAEP_mgf1(out
, ret
, rctx
->tbuf
+ i
,
377 rctx
->md
, rctx
->mgf1md
);
379 ret
= RSA_private_decrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
387 static int check_padding_md(const EVP_MD
*md
, int padding
)
392 if (padding
== RSA_NO_PADDING
) {
393 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_PADDING_MODE
);
397 if (padding
== RSA_X931_PADDING
) {
398 if (RSA_X931_hash_id(EVP_MD_type(md
)) == -1) {
399 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_X931_DIGEST
);
408 static int pkey_rsa_ctrl(EVP_PKEY_CTX
*ctx
, int type
, int p1
, void *p2
)
410 RSA_PKEY_CTX
*rctx
= ctx
->data
;
412 case EVP_PKEY_CTRL_RSA_PADDING
:
413 if ((p1
>= RSA_PKCS1_PADDING
) && (p1
<= RSA_PKCS1_PSS_PADDING
)) {
414 if (!check_padding_md(rctx
->md
, p1
))
416 if (p1
== RSA_PKCS1_PSS_PADDING
) {
417 if (!(ctx
->operation
&
418 (EVP_PKEY_OP_SIGN
| EVP_PKEY_OP_VERIFY
)))
421 rctx
->md
= EVP_sha1();
423 if (p1
== RSA_PKCS1_OAEP_PADDING
) {
424 if (!(ctx
->operation
& EVP_PKEY_OP_TYPE_CRYPT
))
427 rctx
->md
= EVP_sha1();
433 RSAerr(RSA_F_PKEY_RSA_CTRL
,
434 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE
);
437 case EVP_PKEY_CTRL_GET_RSA_PADDING
:
438 *(int *)p2
= rctx
->pad_mode
;
441 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN
:
442 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
:
443 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
) {
444 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PSS_SALTLEN
);
447 if (type
== EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
)
448 *(int *)p2
= rctx
->saltlen
;
456 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS
:
458 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_KEY_SIZE_TOO_SMALL
);
464 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP
:
467 BN_free(rctx
->pub_exp
);
471 case EVP_PKEY_CTRL_RSA_OAEP_MD
:
472 case EVP_PKEY_CTRL_GET_RSA_OAEP_MD
:
473 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
474 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
477 if (type
== EVP_PKEY_CTRL_GET_RSA_OAEP_MD
)
478 *(const EVP_MD
**)p2
= rctx
->md
;
483 case EVP_PKEY_CTRL_MD
:
484 if (!check_padding_md(p2
, rctx
->pad_mode
))
489 case EVP_PKEY_CTRL_GET_MD
:
490 *(const EVP_MD
**)p2
= rctx
->md
;
493 case EVP_PKEY_CTRL_RSA_MGF1_MD
:
494 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD
:
495 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
496 && rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
497 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_MGF1_MD
);
500 if (type
== EVP_PKEY_CTRL_GET_RSA_MGF1_MD
) {
502 *(const EVP_MD
**)p2
= rctx
->mgf1md
;
504 *(const EVP_MD
**)p2
= rctx
->md
;
509 case EVP_PKEY_CTRL_RSA_OAEP_LABEL
:
510 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
511 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
514 OPENSSL_free(rctx
->oaep_label
);
516 rctx
->oaep_label
= p2
;
517 rctx
->oaep_labellen
= p1
;
519 rctx
->oaep_label
= NULL
;
520 rctx
->oaep_labellen
= 0;
524 case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL
:
525 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
526 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
529 *(unsigned char **)p2
= rctx
->oaep_label
;
530 return rctx
->oaep_labellen
;
532 case EVP_PKEY_CTRL_DIGESTINIT
:
533 case EVP_PKEY_CTRL_PKCS7_ENCRYPT
:
534 case EVP_PKEY_CTRL_PKCS7_DECRYPT
:
535 case EVP_PKEY_CTRL_PKCS7_SIGN
:
537 #ifndef OPENSSL_NO_CMS
538 case EVP_PKEY_CTRL_CMS_DECRYPT
:
539 case EVP_PKEY_CTRL_CMS_ENCRYPT
:
540 case EVP_PKEY_CTRL_CMS_SIGN
:
543 case EVP_PKEY_CTRL_PEER_KEY
:
544 RSAerr(RSA_F_PKEY_RSA_CTRL
,
545 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE
);
554 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX
*ctx
,
555 const char *type
, const char *value
)
558 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_VALUE_MISSING
);
561 if (!strcmp(type
, "rsa_padding_mode")) {
563 if (!strcmp(value
, "pkcs1"))
564 pm
= RSA_PKCS1_PADDING
;
565 else if (!strcmp(value
, "sslv23"))
566 pm
= RSA_SSLV23_PADDING
;
567 else if (!strcmp(value
, "none"))
569 else if (!strcmp(value
, "oeap"))
570 pm
= RSA_PKCS1_OAEP_PADDING
;
571 else if (!strcmp(value
, "oaep"))
572 pm
= RSA_PKCS1_OAEP_PADDING
;
573 else if (!strcmp(value
, "x931"))
574 pm
= RSA_X931_PADDING
;
575 else if (!strcmp(value
, "pss"))
576 pm
= RSA_PKCS1_PSS_PADDING
;
578 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_UNKNOWN_PADDING_TYPE
);
581 return EVP_PKEY_CTX_set_rsa_padding(ctx
, pm
);
584 if (!strcmp(type
, "rsa_pss_saltlen")) {
586 saltlen
= atoi(value
);
587 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx
, saltlen
);
590 if (!strcmp(type
, "rsa_keygen_bits")) {
593 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx
, nbits
);
596 if (!strcmp(type
, "rsa_keygen_pubexp")) {
598 BIGNUM
*pubexp
= NULL
;
599 if (!BN_asc2bn(&pubexp
, value
))
601 ret
= EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx
, pubexp
);
607 if (!strcmp(type
, "rsa_mgf1_md")) {
609 if (!(md
= EVP_get_digestbyname(value
))) {
610 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_INVALID_DIGEST
);
613 return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx
, md
);
616 if (!strcmp(type
, "rsa_oaep_md")) {
618 if (!(md
= EVP_get_digestbyname(value
))) {
619 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_INVALID_DIGEST
);
622 return EVP_PKEY_CTX_set_rsa_oaep_md(ctx
, md
);
624 if (!strcmp(type
, "rsa_oaep_label")) {
628 lab
= string_to_hex(value
, &lablen
);
631 ret
= EVP_PKEY_CTX_set0_rsa_oaep_label(ctx
, lab
, lablen
);
640 static int pkey_rsa_keygen(EVP_PKEY_CTX
*ctx
, EVP_PKEY
*pkey
)
643 RSA_PKEY_CTX
*rctx
= ctx
->data
;
646 if (!rctx
->pub_exp
) {
647 rctx
->pub_exp
= BN_new();
648 if (!rctx
->pub_exp
|| !BN_set_word(rctx
->pub_exp
, RSA_F4
))
654 if (ctx
->pkey_gencb
) {
655 pcb
= BN_GENCB_new();
660 evp_pkey_set_cb_translate(pcb
, ctx
);
663 ret
= RSA_generate_key_ex(rsa
, rctx
->nbits
, rctx
->pub_exp
, pcb
);
666 EVP_PKEY_assign_RSA(pkey
, rsa
);
672 const EVP_PKEY_METHOD rsa_pkey_meth
= {
674 EVP_PKEY_FLAG_AUTOARGLEN
,
691 pkey_rsa_verifyrecover
,