2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include "internal/cryptlib.h"
12 #include <openssl/asn1t.h>
13 #include <openssl/x509.h>
14 #include <openssl/rsa.h>
15 #include <openssl/bn.h>
16 #include <openssl/evp.h>
17 #include <openssl/x509v3.h>
18 #include <openssl/cms.h>
19 #include "internal/evp_int.h"
22 /* RSA pkey context structure */
25 /* Key gen parameters */
29 /* Keygen callback info */
31 /* RSA padding mode */
35 /* message digest for MGF1 */
39 /* Minimum salt length or -1 if no PSS parameter restriction */
44 unsigned char *oaep_label
;
48 /* True if PSS parameters are restricted */
49 #define rsa_pss_restricted(rctx) (rctx->min_saltlen != -1)
51 static int pkey_rsa_init(EVP_PKEY_CTX
*ctx
)
53 RSA_PKEY_CTX
*rctx
= OPENSSL_zalloc(sizeof(*rctx
));
58 rctx
->primes
= RSA_DEFAULT_PRIME_NUM
;
59 if (pkey_ctx_is_pss(ctx
))
60 rctx
->pad_mode
= RSA_PKCS1_PSS_PADDING
;
62 rctx
->pad_mode
= RSA_PKCS1_PADDING
;
63 /* Maximum for sign, auto for verify */
64 rctx
->saltlen
= RSA_PSS_SALTLEN_AUTO
;
65 rctx
->min_saltlen
= -1;
67 ctx
->keygen_info
= rctx
->gentmp
;
68 ctx
->keygen_info_count
= 2;
73 static int pkey_rsa_copy(EVP_PKEY_CTX
*dst
, const EVP_PKEY_CTX
*src
)
75 RSA_PKEY_CTX
*dctx
, *sctx
;
77 if (!pkey_rsa_init(dst
))
81 dctx
->nbits
= sctx
->nbits
;
83 dctx
->pub_exp
= BN_dup(sctx
->pub_exp
);
87 dctx
->pad_mode
= sctx
->pad_mode
;
89 dctx
->mgf1md
= sctx
->mgf1md
;
90 if (sctx
->oaep_label
) {
91 OPENSSL_free(dctx
->oaep_label
);
92 dctx
->oaep_label
= OPENSSL_memdup(sctx
->oaep_label
, sctx
->oaep_labellen
);
93 if (!dctx
->oaep_label
)
95 dctx
->oaep_labellen
= sctx
->oaep_labellen
;
100 static int setup_tbuf(RSA_PKEY_CTX
*ctx
, EVP_PKEY_CTX
*pk
)
102 if (ctx
->tbuf
!= NULL
)
104 if ((ctx
->tbuf
= OPENSSL_malloc(EVP_PKEY_size(pk
->pkey
))) == NULL
) {
105 RSAerr(RSA_F_SETUP_TBUF
, ERR_R_MALLOC_FAILURE
);
111 static void pkey_rsa_cleanup(EVP_PKEY_CTX
*ctx
)
113 RSA_PKEY_CTX
*rctx
= ctx
->data
;
115 BN_free(rctx
->pub_exp
);
116 OPENSSL_free(rctx
->tbuf
);
117 OPENSSL_free(rctx
->oaep_label
);
122 static int pkey_rsa_sign(EVP_PKEY_CTX
*ctx
, unsigned char *sig
,
123 size_t *siglen
, const unsigned char *tbs
,
127 RSA_PKEY_CTX
*rctx
= ctx
->data
;
128 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
131 if (tbslen
!= (size_t)EVP_MD_size(rctx
->md
)) {
132 RSAerr(RSA_F_PKEY_RSA_SIGN
, RSA_R_INVALID_DIGEST_LENGTH
);
136 if (EVP_MD_type(rctx
->md
) == NID_mdc2
) {
138 if (rctx
->pad_mode
!= RSA_PKCS1_PADDING
)
140 ret
= RSA_sign_ASN1_OCTET_STRING(0,
141 tbs
, tbslen
, sig
, &sltmp
, rsa
);
146 } else if (rctx
->pad_mode
== RSA_X931_PADDING
) {
147 if ((size_t)EVP_PKEY_size(ctx
->pkey
) < tbslen
+ 1) {
148 RSAerr(RSA_F_PKEY_RSA_SIGN
, RSA_R_KEY_SIZE_TOO_SMALL
);
151 if (!setup_tbuf(rctx
, ctx
)) {
152 RSAerr(RSA_F_PKEY_RSA_SIGN
, ERR_R_MALLOC_FAILURE
);
155 memcpy(rctx
->tbuf
, tbs
, tbslen
);
156 rctx
->tbuf
[tbslen
] = RSA_X931_hash_id(EVP_MD_type(rctx
->md
));
157 ret
= RSA_private_encrypt(tbslen
+ 1, rctx
->tbuf
,
158 sig
, rsa
, RSA_X931_PADDING
);
159 } else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
) {
161 ret
= RSA_sign(EVP_MD_type(rctx
->md
),
162 tbs
, tbslen
, sig
, &sltmp
, rsa
);
166 } else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
) {
167 if (!setup_tbuf(rctx
, ctx
))
169 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa
,
171 rctx
->md
, rctx
->mgf1md
,
174 ret
= RSA_private_encrypt(RSA_size(rsa
), rctx
->tbuf
,
175 sig
, rsa
, RSA_NO_PADDING
);
180 ret
= RSA_private_encrypt(tbslen
, tbs
, sig
, ctx
->pkey
->pkey
.rsa
,
189 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX
*ctx
,
190 unsigned char *rout
, size_t *routlen
,
191 const unsigned char *sig
, size_t siglen
)
194 RSA_PKEY_CTX
*rctx
= ctx
->data
;
197 if (rctx
->pad_mode
== RSA_X931_PADDING
) {
198 if (!setup_tbuf(rctx
, ctx
))
200 ret
= RSA_public_decrypt(siglen
, sig
,
201 rctx
->tbuf
, ctx
->pkey
->pkey
.rsa
,
206 if (rctx
->tbuf
[ret
] != RSA_X931_hash_id(EVP_MD_type(rctx
->md
))) {
207 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
208 RSA_R_ALGORITHM_MISMATCH
);
211 if (ret
!= EVP_MD_size(rctx
->md
)) {
212 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
213 RSA_R_INVALID_DIGEST_LENGTH
);
217 memcpy(rout
, rctx
->tbuf
, ret
);
218 } else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
) {
220 ret
= int_rsa_verify(EVP_MD_type(rctx
->md
),
221 NULL
, 0, rout
, &sltmp
,
222 sig
, siglen
, ctx
->pkey
->pkey
.rsa
);
230 ret
= RSA_public_decrypt(siglen
, sig
, rout
, ctx
->pkey
->pkey
.rsa
,
239 static int pkey_rsa_verify(EVP_PKEY_CTX
*ctx
,
240 const unsigned char *sig
, size_t siglen
,
241 const unsigned char *tbs
, size_t tbslen
)
243 RSA_PKEY_CTX
*rctx
= ctx
->data
;
244 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
248 if (rctx
->pad_mode
== RSA_PKCS1_PADDING
)
249 return RSA_verify(EVP_MD_type(rctx
->md
), tbs
, tbslen
,
251 if (tbslen
!= (size_t)EVP_MD_size(rctx
->md
)) {
252 RSAerr(RSA_F_PKEY_RSA_VERIFY
, RSA_R_INVALID_DIGEST_LENGTH
);
255 if (rctx
->pad_mode
== RSA_X931_PADDING
) {
256 if (pkey_rsa_verifyrecover(ctx
, NULL
, &rslen
, sig
, siglen
) <= 0)
258 } else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
) {
260 if (!setup_tbuf(rctx
, ctx
))
262 ret
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
263 rsa
, RSA_NO_PADDING
);
266 ret
= RSA_verify_PKCS1_PSS_mgf1(rsa
, tbs
,
267 rctx
->md
, rctx
->mgf1md
,
268 rctx
->tbuf
, rctx
->saltlen
);
276 if (!setup_tbuf(rctx
, ctx
))
278 rslen
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
279 rsa
, rctx
->pad_mode
);
284 if ((rslen
!= tbslen
) || memcmp(tbs
, rctx
->tbuf
, rslen
))
291 static int pkey_rsa_encrypt(EVP_PKEY_CTX
*ctx
,
292 unsigned char *out
, size_t *outlen
,
293 const unsigned char *in
, size_t inlen
)
296 RSA_PKEY_CTX
*rctx
= ctx
->data
;
298 if (rctx
->pad_mode
== RSA_PKCS1_OAEP_PADDING
) {
299 int klen
= RSA_size(ctx
->pkey
->pkey
.rsa
);
300 if (!setup_tbuf(rctx
, ctx
))
302 if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx
->tbuf
, klen
,
306 rctx
->md
, rctx
->mgf1md
))
308 ret
= RSA_public_encrypt(klen
, rctx
->tbuf
, out
,
309 ctx
->pkey
->pkey
.rsa
, RSA_NO_PADDING
);
311 ret
= RSA_public_encrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
320 static int pkey_rsa_decrypt(EVP_PKEY_CTX
*ctx
,
321 unsigned char *out
, size_t *outlen
,
322 const unsigned char *in
, size_t inlen
)
325 RSA_PKEY_CTX
*rctx
= ctx
->data
;
327 if (rctx
->pad_mode
== RSA_PKCS1_OAEP_PADDING
) {
328 if (!setup_tbuf(rctx
, ctx
))
330 ret
= RSA_private_decrypt(inlen
, in
, rctx
->tbuf
,
331 ctx
->pkey
->pkey
.rsa
, RSA_NO_PADDING
);
334 ret
= RSA_padding_check_PKCS1_OAEP_mgf1(out
, ret
, rctx
->tbuf
,
338 rctx
->md
, rctx
->mgf1md
);
340 ret
= RSA_private_decrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
349 static int check_padding_md(const EVP_MD
*md
, int padding
)
356 mdnid
= EVP_MD_type(md
);
358 if (padding
== RSA_NO_PADDING
) {
359 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_PADDING_MODE
);
363 if (padding
== RSA_X931_PADDING
) {
364 if (RSA_X931_hash_id(mdnid
) == -1) {
365 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_X931_DIGEST
);
370 /* List of all supported RSA digests */
389 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_DIGEST
);
398 static int pkey_rsa_ctrl(EVP_PKEY_CTX
*ctx
, int type
, int p1
, void *p2
)
400 RSA_PKEY_CTX
*rctx
= ctx
->data
;
403 case EVP_PKEY_CTRL_RSA_PADDING
:
404 if ((p1
>= RSA_PKCS1_PADDING
) && (p1
<= RSA_PKCS1_PSS_PADDING
)) {
405 if (!check_padding_md(rctx
->md
, p1
))
407 if (p1
== RSA_PKCS1_PSS_PADDING
) {
408 if (!(ctx
->operation
&
409 (EVP_PKEY_OP_SIGN
| EVP_PKEY_OP_VERIFY
)))
412 rctx
->md
= EVP_sha1();
413 } else if (pkey_ctx_is_pss(ctx
)) {
416 if (p1
== RSA_PKCS1_OAEP_PADDING
) {
417 if (!(ctx
->operation
& EVP_PKEY_OP_TYPE_CRYPT
))
420 rctx
->md
= EVP_sha1();
426 RSAerr(RSA_F_PKEY_RSA_CTRL
,
427 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE
);
430 case EVP_PKEY_CTRL_GET_RSA_PADDING
:
431 *(int *)p2
= rctx
->pad_mode
;
434 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN
:
435 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
:
436 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
) {
437 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PSS_SALTLEN
);
440 if (type
== EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
) {
441 *(int *)p2
= rctx
->saltlen
;
443 if (p1
< RSA_PSS_SALTLEN_MAX
)
445 if (rsa_pss_restricted(rctx
)) {
446 if (p1
== RSA_PSS_SALTLEN_AUTO
447 && ctx
->operation
== EVP_PKEY_OP_VERIFY
) {
448 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PSS_SALTLEN
);
451 if ((p1
== RSA_PSS_SALTLEN_DIGEST
452 && rctx
->min_saltlen
> EVP_MD_size(rctx
->md
))
453 || (p1
>= 0 && p1
< rctx
->min_saltlen
)) {
454 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_PSS_SALTLEN_TOO_SMALL
);
462 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS
:
463 if (p1
< RSA_MIN_MODULUS_BITS
) {
464 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_KEY_SIZE_TOO_SMALL
);
470 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP
:
471 if (p2
== NULL
|| !BN_is_odd((BIGNUM
*)p2
) || BN_is_one((BIGNUM
*)p2
)) {
472 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_BAD_E_VALUE
);
475 BN_free(rctx
->pub_exp
);
479 case EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES
:
480 if (p1
< RSA_DEFAULT_PRIME_NUM
|| p1
> RSA_MAX_PRIME_NUM
) {
481 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_KEY_PRIME_NUM_INVALID
);
487 case EVP_PKEY_CTRL_RSA_OAEP_MD
:
488 case EVP_PKEY_CTRL_GET_RSA_OAEP_MD
:
489 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
490 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
493 if (type
== EVP_PKEY_CTRL_GET_RSA_OAEP_MD
)
494 *(const EVP_MD
**)p2
= rctx
->md
;
499 case EVP_PKEY_CTRL_MD
:
500 if (!check_padding_md(p2
, rctx
->pad_mode
))
502 if (rsa_pss_restricted(rctx
)) {
503 if (EVP_MD_type(rctx
->md
) == EVP_MD_type(p2
))
505 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_DIGEST_NOT_ALLOWED
);
511 case EVP_PKEY_CTRL_GET_MD
:
512 *(const EVP_MD
**)p2
= rctx
->md
;
515 case EVP_PKEY_CTRL_RSA_MGF1_MD
:
516 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD
:
517 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
518 && rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
519 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_MGF1_MD
);
522 if (type
== EVP_PKEY_CTRL_GET_RSA_MGF1_MD
) {
524 *(const EVP_MD
**)p2
= rctx
->mgf1md
;
526 *(const EVP_MD
**)p2
= rctx
->md
;
528 if (rsa_pss_restricted(rctx
)) {
529 if (EVP_MD_type(rctx
->mgf1md
) == EVP_MD_type(p2
))
531 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_MGF1_DIGEST_NOT_ALLOWED
);
538 case EVP_PKEY_CTRL_RSA_OAEP_LABEL
:
539 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
540 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
543 OPENSSL_free(rctx
->oaep_label
);
545 rctx
->oaep_label
= p2
;
546 rctx
->oaep_labellen
= p1
;
548 rctx
->oaep_label
= NULL
;
549 rctx
->oaep_labellen
= 0;
553 case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL
:
554 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
555 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
558 *(unsigned char **)p2
= rctx
->oaep_label
;
559 return rctx
->oaep_labellen
;
561 case EVP_PKEY_CTRL_DIGESTINIT
:
562 case EVP_PKEY_CTRL_PKCS7_SIGN
:
563 #ifndef OPENSSL_NO_CMS
564 case EVP_PKEY_CTRL_CMS_SIGN
:
568 case EVP_PKEY_CTRL_PKCS7_ENCRYPT
:
569 case EVP_PKEY_CTRL_PKCS7_DECRYPT
:
570 #ifndef OPENSSL_NO_CMS
571 case EVP_PKEY_CTRL_CMS_DECRYPT
:
572 case EVP_PKEY_CTRL_CMS_ENCRYPT
:
574 if (!pkey_ctx_is_pss(ctx
))
577 case EVP_PKEY_CTRL_PEER_KEY
:
578 RSAerr(RSA_F_PKEY_RSA_CTRL
,
579 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE
);
588 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX
*ctx
,
589 const char *type
, const char *value
)
592 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_VALUE_MISSING
);
595 if (strcmp(type
, "rsa_padding_mode") == 0) {
598 if (strcmp(value
, "pkcs1") == 0) {
599 pm
= RSA_PKCS1_PADDING
;
600 } else if (strcmp(value
, "sslv23") == 0) {
601 pm
= RSA_SSLV23_PADDING
;
602 } else if (strcmp(value
, "none") == 0) {
604 } else if (strcmp(value
, "oeap") == 0) {
605 pm
= RSA_PKCS1_OAEP_PADDING
;
606 } else if (strcmp(value
, "oaep") == 0) {
607 pm
= RSA_PKCS1_OAEP_PADDING
;
608 } else if (strcmp(value
, "x931") == 0) {
609 pm
= RSA_X931_PADDING
;
610 } else if (strcmp(value
, "pss") == 0) {
611 pm
= RSA_PKCS1_PSS_PADDING
;
613 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_UNKNOWN_PADDING_TYPE
);
616 return EVP_PKEY_CTX_set_rsa_padding(ctx
, pm
);
619 if (strcmp(type
, "rsa_pss_saltlen") == 0) {
622 if (!strcmp(value
, "digest"))
623 saltlen
= RSA_PSS_SALTLEN_DIGEST
;
624 else if (!strcmp(value
, "max"))
625 saltlen
= RSA_PSS_SALTLEN_MAX
;
626 else if (!strcmp(value
, "auto"))
627 saltlen
= RSA_PSS_SALTLEN_AUTO
;
629 saltlen
= atoi(value
);
630 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx
, saltlen
);
633 if (strcmp(type
, "rsa_keygen_bits") == 0) {
634 int nbits
= atoi(value
);
636 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx
, nbits
);
639 if (strcmp(type
, "rsa_keygen_pubexp") == 0) {
642 BIGNUM
*pubexp
= NULL
;
643 if (!BN_asc2bn(&pubexp
, value
))
645 ret
= EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx
, pubexp
);
651 if (strcmp(type
, "rsa_keygen_primes") == 0) {
652 int nprimes
= atoi(value
);
654 return EVP_PKEY_CTX_set_rsa_keygen_primes(ctx
, nprimes
);
657 if (strcmp(type
, "rsa_mgf1_md") == 0)
658 return EVP_PKEY_CTX_md(ctx
,
659 EVP_PKEY_OP_TYPE_SIG
| EVP_PKEY_OP_TYPE_CRYPT
,
660 EVP_PKEY_CTRL_RSA_MGF1_MD
, value
);
662 if (pkey_ctx_is_pss(ctx
)) {
664 if (strcmp(type
, "rsa_pss_keygen_mgf1_md") == 0)
665 return EVP_PKEY_CTX_md(ctx
, EVP_PKEY_OP_KEYGEN
,
666 EVP_PKEY_CTRL_RSA_MGF1_MD
, value
);
668 if (strcmp(type
, "rsa_pss_keygen_md") == 0)
669 return EVP_PKEY_CTX_md(ctx
, EVP_PKEY_OP_KEYGEN
,
670 EVP_PKEY_CTRL_MD
, value
);
672 if (strcmp(type
, "rsa_pss_keygen_saltlen") == 0) {
673 int saltlen
= atoi(value
);
675 return EVP_PKEY_CTX_set_rsa_pss_keygen_saltlen(ctx
, saltlen
);
679 if (strcmp(type
, "rsa_oaep_md") == 0)
680 return EVP_PKEY_CTX_md(ctx
, EVP_PKEY_OP_TYPE_CRYPT
,
681 EVP_PKEY_CTRL_RSA_OAEP_MD
, value
);
683 if (strcmp(type
, "rsa_oaep_label") == 0) {
688 lab
= OPENSSL_hexstr2buf(value
, &lablen
);
691 ret
= EVP_PKEY_CTX_set0_rsa_oaep_label(ctx
, lab
, lablen
);
700 /* Set PSS parameters when generating a key, if necessary */
701 static int rsa_set_pss_param(RSA
*rsa
, EVP_PKEY_CTX
*ctx
)
703 RSA_PKEY_CTX
*rctx
= ctx
->data
;
705 if (!pkey_ctx_is_pss(ctx
))
707 /* If all parameters are default values don't set pss */
708 if (rctx
->md
== NULL
&& rctx
->mgf1md
== NULL
&& rctx
->saltlen
== -2)
710 rsa
->pss
= rsa_pss_params_create(rctx
->md
, rctx
->mgf1md
,
711 rctx
->saltlen
== -2 ? 0 : rctx
->saltlen
);
712 if (rsa
->pss
== NULL
)
717 static int pkey_rsa_keygen(EVP_PKEY_CTX
*ctx
, EVP_PKEY
*pkey
)
720 RSA_PKEY_CTX
*rctx
= ctx
->data
;
724 if (rctx
->pub_exp
== NULL
) {
725 rctx
->pub_exp
= BN_new();
726 if (rctx
->pub_exp
== NULL
|| !BN_set_word(rctx
->pub_exp
, RSA_F4
))
732 if (ctx
->pkey_gencb
) {
733 pcb
= BN_GENCB_new();
738 evp_pkey_set_cb_translate(pcb
, ctx
);
742 ret
= RSA_generate_multi_prime_key(rsa
, rctx
->nbits
, rctx
->primes
,
745 if (ret
> 0 && !rsa_set_pss_param(rsa
, ctx
)) {
750 EVP_PKEY_assign(pkey
, ctx
->pmeth
->pkey_id
, rsa
);
756 const EVP_PKEY_METHOD rsa_pkey_meth
= {
758 EVP_PKEY_FLAG_AUTOARGLEN
,
775 pkey_rsa_verifyrecover
,
792 * Called for PSS sign or verify initialisation: checks PSS parameter
793 * sanity and sets any restrictions on key usage.
796 static int pkey_pss_init(EVP_PKEY_CTX
*ctx
)
799 RSA_PKEY_CTX
*rctx
= ctx
->data
;
801 const EVP_MD
*mgf1md
;
802 int min_saltlen
, max_saltlen
;
804 /* Should never happen */
805 if (!pkey_ctx_is_pss(ctx
))
807 rsa
= ctx
->pkey
->pkey
.rsa
;
808 /* If no restrictions just return */
809 if (rsa
->pss
== NULL
)
811 /* Get and check parameters */
812 if (!rsa_pss_get_param(rsa
->pss
, &md
, &mgf1md
, &min_saltlen
))
815 /* See if minimum salt length exceeds maximum possible */
816 max_saltlen
= RSA_size(rsa
) - EVP_MD_size(md
);
817 if ((RSA_bits(rsa
) & 0x7) == 1)
819 if (min_saltlen
> max_saltlen
) {
820 RSAerr(RSA_F_PKEY_PSS_INIT
, RSA_R_INVALID_SALT_LENGTH
);
824 rctx
->min_saltlen
= min_saltlen
;
827 * Set PSS restrictions as defaults: we can then block any attempt to
828 * use invalid values in pkey_rsa_ctrl
832 rctx
->mgf1md
= mgf1md
;
833 rctx
->saltlen
= min_saltlen
;
838 const EVP_PKEY_METHOD rsa_pss_pkey_meth
= {
840 EVP_PKEY_FLAG_AUTOARGLEN
,
856 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,