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>
72 # include <openssl/fips.h>
77 /* RSA pkey context structure */
80 /* Key gen parameters */
83 /* Keygen callback info */
85 /* RSA padding mode */
89 /* message digest for MGF1 */
96 unsigned char *oaep_label
;
100 static int pkey_rsa_init(EVP_PKEY_CTX
*ctx
)
103 rctx
= OPENSSL_malloc(sizeof(RSA_PKEY_CTX
));
107 rctx
->pub_exp
= NULL
;
108 rctx
->pad_mode
= RSA_PKCS1_PADDING
;
115 rctx
->oaep_label
= NULL
;
116 rctx
->oaep_labellen
= 0;
119 ctx
->keygen_info
= rctx
->gentmp
;
120 ctx
->keygen_info_count
= 2;
125 static int pkey_rsa_copy(EVP_PKEY_CTX
*dst
, EVP_PKEY_CTX
*src
)
127 RSA_PKEY_CTX
*dctx
, *sctx
;
128 if (!pkey_rsa_init(dst
))
132 dctx
->nbits
= sctx
->nbits
;
134 dctx
->pub_exp
= BN_dup(sctx
->pub_exp
);
138 dctx
->pad_mode
= sctx
->pad_mode
;
140 dctx
->mgf1md
= sctx
->mgf1md
;
141 if (sctx
->oaep_label
) {
142 if (dctx
->oaep_label
)
143 OPENSSL_free(dctx
->oaep_label
);
144 dctx
->oaep_label
= BUF_memdup(sctx
->oaep_label
, sctx
->oaep_labellen
);
145 if (!dctx
->oaep_label
)
147 dctx
->oaep_labellen
= sctx
->oaep_labellen
;
152 static int setup_tbuf(RSA_PKEY_CTX
*ctx
, EVP_PKEY_CTX
*pk
)
156 ctx
->tbuf
= OPENSSL_malloc(EVP_PKEY_size(pk
->pkey
));
162 static void pkey_rsa_cleanup(EVP_PKEY_CTX
*ctx
)
164 RSA_PKEY_CTX
*rctx
= ctx
->data
;
167 BN_free(rctx
->pub_exp
);
169 OPENSSL_free(rctx
->tbuf
);
170 if (rctx
->oaep_label
)
171 OPENSSL_free(rctx
->oaep_label
);
178 * FIP checker. Return value indicates status of context parameters: 1 :
179 * redirect to FIPS. 0 : don't redirect to FIPS. -1 : illegal operation in
183 static int pkey_fips_check_ctx(EVP_PKEY_CTX
*ctx
)
185 RSA_PKEY_CTX
*rctx
= ctx
->data
;
186 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
190 if (rsa
->flags
& RSA_FLAG_NON_FIPS_ALLOW
)
192 if (!(rsa
->meth
->flags
& RSA_FLAG_FIPS_METHOD
) && rv
)
196 fmd
= FIPS_get_digestbynid(EVP_MD_type(rctx
->md
));
197 if (!fmd
|| !(fmd
->flags
& EVP_MD_FLAG_FIPS
))
200 if (rctx
->mgf1md
&& !(rctx
->mgf1md
->flags
& EVP_MD_FLAG_FIPS
)) {
202 fmd
= FIPS_get_digestbynid(EVP_MD_type(rctx
->mgf1md
));
203 if (!fmd
|| !(fmd
->flags
& EVP_MD_FLAG_FIPS
))
210 static int pkey_rsa_sign(EVP_PKEY_CTX
*ctx
, unsigned char *sig
,
211 size_t *siglen
, const unsigned char *tbs
,
215 RSA_PKEY_CTX
*rctx
= ctx
->data
;
216 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
219 ret
= pkey_fips_check_ctx(ctx
);
221 RSAerr(RSA_F_PKEY_RSA_SIGN
, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE
);
227 if (tbslen
!= (size_t)EVP_MD_size(rctx
->md
)) {
228 RSAerr(RSA_F_PKEY_RSA_SIGN
, RSA_R_INVALID_DIGEST_LENGTH
);
234 ret
= FIPS_rsa_sign_digest(rsa
, tbs
, tbslen
, rctx
->md
,
237 rctx
->mgf1md
, sig
, &slen
);
246 if (EVP_MD_type(rctx
->md
) == NID_mdc2
) {
248 if (rctx
->pad_mode
!= RSA_PKCS1_PADDING
)
250 ret
= RSA_sign_ASN1_OCTET_STRING(NID_mdc2
,
251 tbs
, tbslen
, sig
, &sltmp
, rsa
);
256 } else if (rctx
->pad_mode
== RSA_X931_PADDING
) {
257 if (!setup_tbuf(rctx
, ctx
))
259 memcpy(rctx
->tbuf
, tbs
, tbslen
);
260 rctx
->tbuf
[tbslen
] = RSA_X931_hash_id(EVP_MD_type(rctx
->md
));
261 ret
= RSA_private_encrypt(tbslen
+ 1, rctx
->tbuf
,
262 sig
, rsa
, RSA_X931_PADDING
);
263 } else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
) {
265 ret
= RSA_sign(EVP_MD_type(rctx
->md
),
266 tbs
, tbslen
, sig
, &sltmp
, rsa
);
270 } else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
) {
271 if (!setup_tbuf(rctx
, ctx
))
273 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa
,
275 rctx
->md
, rctx
->mgf1md
,
278 ret
= RSA_private_encrypt(RSA_size(rsa
), rctx
->tbuf
,
279 sig
, rsa
, RSA_NO_PADDING
);
283 ret
= RSA_private_encrypt(tbslen
, tbs
, sig
, ctx
->pkey
->pkey
.rsa
,
291 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX
*ctx
,
292 unsigned char *rout
, size_t *routlen
,
293 const unsigned char *sig
, size_t siglen
)
296 RSA_PKEY_CTX
*rctx
= ctx
->data
;
299 if (rctx
->pad_mode
== RSA_X931_PADDING
) {
300 if (!setup_tbuf(rctx
, ctx
))
302 ret
= RSA_public_decrypt(siglen
, sig
,
303 rctx
->tbuf
, ctx
->pkey
->pkey
.rsa
,
308 if (rctx
->tbuf
[ret
] != RSA_X931_hash_id(EVP_MD_type(rctx
->md
))) {
309 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
310 RSA_R_ALGORITHM_MISMATCH
);
313 if (ret
!= EVP_MD_size(rctx
->md
)) {
314 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
315 RSA_R_INVALID_DIGEST_LENGTH
);
319 memcpy(rout
, rctx
->tbuf
, ret
);
320 } else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
) {
322 ret
= int_rsa_verify(EVP_MD_type(rctx
->md
),
323 NULL
, 0, rout
, &sltmp
,
324 sig
, siglen
, ctx
->pkey
->pkey
.rsa
);
331 ret
= RSA_public_decrypt(siglen
, sig
, rout
, ctx
->pkey
->pkey
.rsa
,
339 static int pkey_rsa_verify(EVP_PKEY_CTX
*ctx
,
340 const unsigned char *sig
, size_t siglen
,
341 const unsigned char *tbs
, size_t tbslen
)
343 RSA_PKEY_CTX
*rctx
= ctx
->data
;
344 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
348 rv
= pkey_fips_check_ctx(ctx
);
350 RSAerr(RSA_F_PKEY_RSA_VERIFY
,
351 RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE
);
358 return FIPS_rsa_verify_digest(rsa
,
363 rctx
->mgf1md
, sig
, siglen
);
367 if (rctx
->pad_mode
== RSA_PKCS1_PADDING
)
368 return RSA_verify(EVP_MD_type(rctx
->md
), tbs
, tbslen
,
370 if (rctx
->pad_mode
== RSA_X931_PADDING
) {
371 if (pkey_rsa_verifyrecover(ctx
, NULL
, &rslen
, sig
, siglen
) <= 0)
373 } else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
) {
375 if (!setup_tbuf(rctx
, ctx
))
377 ret
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
378 rsa
, RSA_NO_PADDING
);
381 ret
= RSA_verify_PKCS1_PSS_mgf1(rsa
, tbs
,
382 rctx
->md
, rctx
->mgf1md
,
383 rctx
->tbuf
, rctx
->saltlen
);
390 if (!setup_tbuf(rctx
, ctx
))
392 rslen
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
393 rsa
, rctx
->pad_mode
);
398 if ((rslen
!= tbslen
) || memcmp(tbs
, rctx
->tbuf
, rslen
))
405 static int pkey_rsa_encrypt(EVP_PKEY_CTX
*ctx
,
406 unsigned char *out
, size_t *outlen
,
407 const unsigned char *in
, size_t inlen
)
410 RSA_PKEY_CTX
*rctx
= ctx
->data
;
411 if (rctx
->pad_mode
== RSA_PKCS1_OAEP_PADDING
) {
412 int klen
= RSA_size(ctx
->pkey
->pkey
.rsa
);
413 if (!setup_tbuf(rctx
, ctx
))
415 if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx
->tbuf
, klen
,
419 rctx
->md
, rctx
->mgf1md
))
421 ret
= RSA_public_encrypt(klen
, rctx
->tbuf
, out
,
422 ctx
->pkey
->pkey
.rsa
, RSA_NO_PADDING
);
424 ret
= RSA_public_encrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
432 static int pkey_rsa_decrypt(EVP_PKEY_CTX
*ctx
,
433 unsigned char *out
, size_t *outlen
,
434 const unsigned char *in
, size_t inlen
)
437 RSA_PKEY_CTX
*rctx
= ctx
->data
;
438 if (rctx
->pad_mode
== RSA_PKCS1_OAEP_PADDING
) {
440 if (!setup_tbuf(rctx
, ctx
))
442 ret
= RSA_private_decrypt(inlen
, in
, rctx
->tbuf
,
443 ctx
->pkey
->pkey
.rsa
, RSA_NO_PADDING
);
446 for (i
= 0; i
< ret
; i
++) {
450 ret
= RSA_padding_check_PKCS1_OAEP_mgf1(out
, ret
, rctx
->tbuf
+ i
,
454 rctx
->md
, rctx
->mgf1md
);
456 ret
= RSA_private_decrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
464 static int check_padding_md(const EVP_MD
*md
, int padding
)
469 if (padding
== RSA_NO_PADDING
) {
470 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_PADDING_MODE
);
474 if (padding
== RSA_X931_PADDING
) {
475 if (RSA_X931_hash_id(EVP_MD_type(md
)) == -1) {
476 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_X931_DIGEST
);
485 static int pkey_rsa_ctrl(EVP_PKEY_CTX
*ctx
, int type
, int p1
, void *p2
)
487 RSA_PKEY_CTX
*rctx
= ctx
->data
;
489 case EVP_PKEY_CTRL_RSA_PADDING
:
490 if ((p1
>= RSA_PKCS1_PADDING
) && (p1
<= RSA_PKCS1_PSS_PADDING
)) {
491 if (!check_padding_md(rctx
->md
, p1
))
493 if (p1
== RSA_PKCS1_PSS_PADDING
) {
494 if (!(ctx
->operation
&
495 (EVP_PKEY_OP_SIGN
| EVP_PKEY_OP_VERIFY
)))
498 rctx
->md
= EVP_sha1();
500 if (p1
== RSA_PKCS1_OAEP_PADDING
) {
501 if (!(ctx
->operation
& EVP_PKEY_OP_TYPE_CRYPT
))
504 rctx
->md
= EVP_sha1();
510 RSAerr(RSA_F_PKEY_RSA_CTRL
,
511 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE
);
514 case EVP_PKEY_CTRL_GET_RSA_PADDING
:
515 *(int *)p2
= rctx
->pad_mode
;
518 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN
:
519 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
:
520 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
) {
521 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PSS_SALTLEN
);
524 if (type
== EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
)
525 *(int *)p2
= rctx
->saltlen
;
533 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS
:
535 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_KEYBITS
);
541 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP
:
544 BN_free(rctx
->pub_exp
);
548 case EVP_PKEY_CTRL_RSA_OAEP_MD
:
549 case EVP_PKEY_CTRL_GET_RSA_OAEP_MD
:
550 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
551 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
554 if (type
== EVP_PKEY_CTRL_GET_RSA_OAEP_MD
)
555 *(const EVP_MD
**)p2
= rctx
->md
;
560 case EVP_PKEY_CTRL_MD
:
561 if (!check_padding_md(p2
, rctx
->pad_mode
))
566 case EVP_PKEY_CTRL_GET_MD
:
567 *(const EVP_MD
**)p2
= rctx
->md
;
570 case EVP_PKEY_CTRL_RSA_MGF1_MD
:
571 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD
:
572 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
573 && rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
574 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_MGF1_MD
);
577 if (type
== EVP_PKEY_CTRL_GET_RSA_MGF1_MD
) {
579 *(const EVP_MD
**)p2
= rctx
->mgf1md
;
581 *(const EVP_MD
**)p2
= rctx
->md
;
586 case EVP_PKEY_CTRL_RSA_OAEP_LABEL
:
587 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
588 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
591 if (rctx
->oaep_label
)
592 OPENSSL_free(rctx
->oaep_label
);
594 rctx
->oaep_label
= p2
;
595 rctx
->oaep_labellen
= p1
;
597 rctx
->oaep_label
= NULL
;
598 rctx
->oaep_labellen
= 0;
602 case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL
:
603 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
604 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
607 *(unsigned char **)p2
= rctx
->oaep_label
;
608 return rctx
->oaep_labellen
;
610 case EVP_PKEY_CTRL_DIGESTINIT
:
611 case EVP_PKEY_CTRL_PKCS7_ENCRYPT
:
612 case EVP_PKEY_CTRL_PKCS7_DECRYPT
:
613 case EVP_PKEY_CTRL_PKCS7_SIGN
:
615 #ifndef OPENSSL_NO_CMS
616 case EVP_PKEY_CTRL_CMS_DECRYPT
:
617 case EVP_PKEY_CTRL_CMS_ENCRYPT
:
618 case EVP_PKEY_CTRL_CMS_SIGN
:
621 case EVP_PKEY_CTRL_PEER_KEY
:
622 RSAerr(RSA_F_PKEY_RSA_CTRL
,
623 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE
);
632 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX
*ctx
,
633 const char *type
, const char *value
)
636 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_VALUE_MISSING
);
639 if (!strcmp(type
, "rsa_padding_mode")) {
641 if (!strcmp(value
, "pkcs1"))
642 pm
= RSA_PKCS1_PADDING
;
643 else if (!strcmp(value
, "sslv23"))
644 pm
= RSA_SSLV23_PADDING
;
645 else if (!strcmp(value
, "none"))
647 else if (!strcmp(value
, "oeap"))
648 pm
= RSA_PKCS1_OAEP_PADDING
;
649 else if (!strcmp(value
, "oaep"))
650 pm
= RSA_PKCS1_OAEP_PADDING
;
651 else if (!strcmp(value
, "x931"))
652 pm
= RSA_X931_PADDING
;
653 else if (!strcmp(value
, "pss"))
654 pm
= RSA_PKCS1_PSS_PADDING
;
656 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_UNKNOWN_PADDING_TYPE
);
659 return EVP_PKEY_CTX_set_rsa_padding(ctx
, pm
);
662 if (!strcmp(type
, "rsa_pss_saltlen")) {
664 saltlen
= atoi(value
);
665 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx
, saltlen
);
668 if (!strcmp(type
, "rsa_keygen_bits")) {
671 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx
, nbits
);
674 if (!strcmp(type
, "rsa_keygen_pubexp")) {
676 BIGNUM
*pubexp
= NULL
;
677 if (!BN_asc2bn(&pubexp
, value
))
679 ret
= EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx
, pubexp
);
685 if (!strcmp(type
, "rsa_mgf1_md")) {
687 if (!(md
= EVP_get_digestbyname(value
))) {
688 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_INVALID_DIGEST
);
691 return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx
, md
);
694 if (!strcmp(type
, "rsa_oaep_md")) {
696 if (!(md
= EVP_get_digestbyname(value
))) {
697 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_INVALID_DIGEST
);
700 return EVP_PKEY_CTX_set_rsa_oaep_md(ctx
, md
);
702 if (!strcmp(type
, "rsa_oaep_label")) {
706 lab
= string_to_hex(value
, &lablen
);
709 ret
= EVP_PKEY_CTX_set0_rsa_oaep_label(ctx
, lab
, lablen
);
718 static int pkey_rsa_keygen(EVP_PKEY_CTX
*ctx
, EVP_PKEY
*pkey
)
721 RSA_PKEY_CTX
*rctx
= ctx
->data
;
724 if (!rctx
->pub_exp
) {
725 rctx
->pub_exp
= BN_new();
726 if (!rctx
->pub_exp
|| !BN_set_word(rctx
->pub_exp
, RSA_F4
))
732 if (ctx
->pkey_gencb
) {
734 evp_pkey_set_cb_translate(pcb
, ctx
);
737 ret
= RSA_generate_key_ex(rsa
, rctx
->nbits
, rctx
->pub_exp
, pcb
);
739 EVP_PKEY_assign_RSA(pkey
, rsa
);
745 const EVP_PKEY_METHOD rsa_pkey_meth
= {
747 EVP_PKEY_FLAG_AUTOARGLEN
,
764 pkey_rsa_verifyrecover
,