2 * Copyright 2006-2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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/bn.h>
15 #include <openssl/cms.h>
16 #include "crypto/asn1.h"
17 #include "crypto/evp.h"
18 #include "rsa_local.h"
20 #ifndef OPENSSL_NO_CMS
21 static int rsa_cms_sign(CMS_SignerInfo *si);
22 static int rsa_cms_verify(CMS_SignerInfo *si);
23 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
24 static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
27 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg);
29 /* Set any parameters associated with pkey */
30 static int rsa_param_encode(const EVP_PKEY *pkey,
31 ASN1_STRING **pstr, int *pstrtype)
33 const RSA *rsa = pkey->pkey.rsa;
36 /* If RSA it's just NULL type */
37 if (pkey->ameth->pkey_id != EVP_PKEY_RSA_PSS) {
38 *pstrtype = V_ASN1_NULL;
41 /* If no PSS parameters we omit parameters entirely */
42 if (rsa->pss == NULL) {
43 *pstrtype = V_ASN1_UNDEF;
46 /* Encode PSS parameters */
47 if (ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr) == NULL)
50 *pstrtype = V_ASN1_SEQUENCE;
53 /* Decode any parameters and set them in RSA structure */
54 static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
56 const ASN1_OBJECT *algoid;
60 X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
61 if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS)
63 if (algptype == V_ASN1_UNDEF)
65 if (algptype != V_ASN1_SEQUENCE) {
66 RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
69 rsa->pss = rsa_pss_decode(alg);
75 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
77 unsigned char *penc = NULL;
82 if (!rsa_param_encode(pkey, &str, &strtype))
84 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
87 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
88 strtype, str, penc, penclen))
95 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
97 const unsigned char *p;
102 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
104 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
105 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
108 if (!rsa_param_decode(rsa, alg)) {
112 if (!EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa)) {
119 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
121 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
122 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
127 static int old_rsa_priv_decode(EVP_PKEY *pkey,
128 const unsigned char **pder, int derlen)
132 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
133 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
136 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
140 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
142 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
145 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
147 unsigned char *rk = NULL;
152 if (!rsa_param_encode(pkey, &str, &strtype))
154 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
157 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
158 ASN1_STRING_free(str);
162 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
163 strtype, str, rk, rklen)) {
164 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
165 ASN1_STRING_free(str);
172 static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
174 const unsigned char *p;
177 const X509_ALGOR *alg;
179 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
181 rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
183 RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
186 if (!rsa_param_decode(rsa, alg)) {
190 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
194 static int int_rsa_size(const EVP_PKEY *pkey)
196 return RSA_size(pkey->pkey.rsa);
199 static int rsa_bits(const EVP_PKEY *pkey)
201 return BN_num_bits(pkey->pkey.rsa->n);
204 static int rsa_security_bits(const EVP_PKEY *pkey)
206 return RSA_security_bits(pkey->pkey.rsa);
209 static void int_rsa_free(EVP_PKEY *pkey)
211 RSA_free(pkey->pkey.rsa);
214 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
216 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
218 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
222 static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
226 X509_ALGOR *maskHash = NULL;
228 if (!BIO_indent(bp, indent, 128))
232 if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
236 if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
239 } else if (pss == NULL) {
240 if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
244 if (BIO_puts(bp, "\n") <= 0)
248 if (!BIO_indent(bp, indent, 128))
250 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
253 if (pss->hashAlgorithm) {
254 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
256 } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
260 if (BIO_puts(bp, "\n") <= 0)
263 if (!BIO_indent(bp, indent, 128))
266 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
268 if (pss->maskGenAlgorithm) {
269 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
271 if (BIO_puts(bp, " with ") <= 0)
273 maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
274 if (maskHash != NULL) {
275 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
277 } else if (BIO_puts(bp, "INVALID") <= 0) {
280 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
285 if (!BIO_indent(bp, indent, 128))
287 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
289 if (pss->saltLength) {
290 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
292 } else if (BIO_puts(bp, "14 (default)") <= 0) {
297 if (!BIO_indent(bp, indent, 128))
299 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
301 if (pss->trailerField) {
302 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
304 } else if (BIO_puts(bp, "BC (default)") <= 0) {
312 X509_ALGOR_free(maskHash);
317 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
319 const RSA *x = pkey->pkey.rsa;
322 int ret = 0, mod_len = 0, ex_primes;
325 mod_len = BN_num_bits(x->n);
326 ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos);
328 if (!BIO_indent(bp, off, 128))
331 if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
335 if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n",
336 mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0)
339 s = "publicExponent:";
341 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
346 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
348 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
353 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
355 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
357 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
359 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
361 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
363 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
365 for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) {
366 /* print multi-prime info */
368 RSA_PRIME_INFO *pinfo;
371 pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i);
372 for (j = 0; j < 3; j++) {
373 if (!BIO_indent(bp, off, 128))
377 if (BIO_printf(bp, "prime%d:", i + 3) <= 0)
382 if (BIO_printf(bp, "exponent%d:", i + 3) <= 0)
387 if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0)
394 if (!ASN1_bn_print(bp, "", bn, NULL, off))
399 if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
406 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
409 return pkey_rsa_print(bp, pkey, indent, 0);
412 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
415 return pkey_rsa_print(bp, pkey, indent, 1);
418 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
422 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
428 if (pss->maskGenAlgorithm != NULL) {
429 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
430 if (pss->maskHash == NULL) {
431 RSA_PSS_PARAMS_free(pss);
439 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
440 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
442 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
444 RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
446 rv = rsa_pss_param_print(bp, 0, pss, indent);
447 RSA_PSS_PARAMS_free(pss);
450 } else if (!sig && BIO_puts(bp, "\n") <= 0) {
454 return X509_signature_dump(bp, sig, indent);
458 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
460 X509_ALGOR *alg = NULL;
462 const EVP_MD *mgf1md;
467 case ASN1_PKEY_CTRL_PKCS7_SIGN:
469 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
472 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
473 if (pkey_is_pss(pkey))
476 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
478 #ifndef OPENSSL_NO_CMS
479 case ASN1_PKEY_CTRL_CMS_SIGN:
481 return rsa_cms_sign(arg2);
483 return rsa_cms_verify(arg2);
486 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
487 if (pkey_is_pss(pkey))
490 return rsa_cms_encrypt(arg2);
492 return rsa_cms_decrypt(arg2);
495 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
496 if (pkey_is_pss(pkey))
498 *(int *)arg2 = CMS_RECIPINFO_TRANS;
502 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
503 if (pkey->pkey.rsa->pss != NULL) {
504 if (!rsa_pss_get_param(pkey->pkey.rsa->pss, &md, &mgf1md,
506 RSAerr(0, ERR_R_INTERNAL_ERROR);
509 *(int *)arg2 = EVP_MD_type(md);
510 /* Return of 2 indicates this MD is mandatory */
513 *(int *)arg2 = NID_sha256;
522 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
528 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
529 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
531 if (md == NULL || EVP_MD_type(md) == NID_sha1)
533 *palg = X509_ALGOR_new();
536 X509_ALGOR_set_md(*palg, md);
540 /* Allocate and set MGF1 algorithm ID from EVP_MD */
541 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
543 X509_ALGOR *algtmp = NULL;
544 ASN1_STRING *stmp = NULL;
547 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
549 /* need to embed algorithm ID inside another */
550 if (!rsa_md_to_algor(&algtmp, mgf1md))
552 if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
554 *palg = X509_ALGOR_new();
557 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
560 ASN1_STRING_free(stmp);
561 X509_ALGOR_free(algtmp);
567 /* convert algorithm ID to EVP_MD, default SHA1 */
568 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
574 md = EVP_get_digestbyobj(alg->algorithm);
576 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
581 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
582 * suitable for setting an AlgorithmIdentifier.
585 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
587 const EVP_MD *sigmd, *mgf1md;
588 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
591 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
593 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
595 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
598 saltlen = EVP_MD_size(sigmd);
599 } else if (saltlen == -2 || saltlen == -3) {
600 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
601 if ((EVP_PKEY_bits(pk) & 0x7) == 1)
607 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
610 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
611 const EVP_MD *mgf1md, int saltlen)
613 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
618 pss->saltLength = ASN1_INTEGER_new();
619 if (pss->saltLength == NULL)
621 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
624 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
628 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
630 if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
634 RSA_PSS_PARAMS_free(pss);
638 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
640 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
646 os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
647 RSA_PSS_PARAMS_free(pss);
652 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
653 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
654 * passed to pkctx instead.
657 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
658 X509_ALGOR *sigalg, EVP_PKEY *pkey)
662 const EVP_MD *mgf1md = NULL, *md = NULL;
665 /* Sanity check: make sure it is PSS */
666 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
667 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
670 /* Decode PSS parameters */
671 pss = rsa_pss_decode(sigalg);
673 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
674 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
678 /* We have all parameters now set up context */
680 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
683 const EVP_MD *checkmd;
684 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
686 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
687 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
692 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
695 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
698 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
704 RSA_PSS_PARAMS_free(pss);
708 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
709 const EVP_MD **pmgf1md, int *psaltlen)
713 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
716 *pmgf1md = rsa_algor_to_md(pss->maskHash);
717 if (*pmgf1md == NULL)
719 if (pss->saltLength) {
720 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
722 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
730 * low-level routines support only trailer field 0xbc (value 1) and
731 * PKCS#1 says we should reject any other value anyway.
733 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
734 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
741 #ifndef OPENSSL_NO_CMS
742 static int rsa_cms_verify(CMS_SignerInfo *si)
746 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
748 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
749 nid = OBJ_obj2nid(alg->algorithm);
750 if (nid == EVP_PKEY_RSA_PSS)
751 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
752 /* Only PSS allowed for PSS keys */
753 if (pkey_ctx_is_pss(pkctx)) {
754 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
757 if (nid == NID_rsaEncryption)
759 /* Workaround for some implementation that use a signature OID */
760 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
761 if (nid2 == NID_rsaEncryption)
769 * Customised RSA item verification routine. This is called when a signature
770 * is encountered requiring special handling. We currently only handle PSS.
773 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
774 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
777 /* Sanity check: make sure it is PSS */
778 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
779 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
782 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
789 #ifndef OPENSSL_NO_CMS
790 static int rsa_cms_sign(CMS_SignerInfo *si)
792 int pad_mode = RSA_PKCS1_PADDING;
794 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
795 ASN1_STRING *os = NULL;
797 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
799 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
802 if (pad_mode == RSA_PKCS1_PADDING) {
803 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
806 /* We don't support it */
807 if (pad_mode != RSA_PKCS1_PSS_PADDING)
809 os = rsa_ctx_to_pss_string(pkctx);
812 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
817 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
818 X509_ALGOR *alg1, X509_ALGOR *alg2,
819 ASN1_BIT_STRING *sig)
822 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
824 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
826 if (pad_mode == RSA_PKCS1_PADDING)
828 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
829 ASN1_STRING *os1 = NULL;
830 os1 = rsa_ctx_to_pss_string(pkctx);
833 /* Duplicate parameters if we have to */
835 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
837 ASN1_STRING_free(os1);
840 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
841 V_ASN1_SEQUENCE, os2);
843 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
844 V_ASN1_SEQUENCE, os1);
850 static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
851 const ASN1_STRING *sig)
856 const EVP_MD *mgf1md = NULL, *md = NULL;
859 /* Sanity check: make sure it is PSS */
860 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
862 /* Decode PSS parameters */
863 pss = rsa_pss_decode(sigalg);
864 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
866 mdnid = EVP_MD_type(md);
868 * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
869 * match and salt length must equal digest size
871 if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
872 && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
873 flags = X509_SIG_INFO_TLS;
876 /* Note: security bits half number of digest bits */
877 X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, EVP_MD_size(md) * 4,
881 RSA_PSS_PARAMS_free(pss);
885 #ifndef OPENSSL_NO_CMS
886 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
888 RSA_OAEP_PARAMS *oaep;
890 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
896 if (oaep->maskGenFunc != NULL) {
897 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
898 if (oaep->maskHash == NULL) {
899 RSA_OAEP_PARAMS_free(oaep);
906 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
912 unsigned char *label = NULL;
914 const EVP_MD *mgf1md = NULL, *md = NULL;
915 RSA_OAEP_PARAMS *oaep;
917 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
920 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
922 nid = OBJ_obj2nid(cmsalg->algorithm);
923 if (nid == NID_rsaEncryption)
925 if (nid != NID_rsaesOaep) {
926 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
929 /* Decode OAEP parameters */
930 oaep = rsa_oaep_decode(cmsalg);
933 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
937 mgf1md = rsa_algor_to_md(oaep->maskHash);
940 md = rsa_algor_to_md(oaep->hashFunc);
944 if (oaep->pSourceFunc != NULL) {
945 X509_ALGOR *plab = oaep->pSourceFunc;
947 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
948 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
951 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
952 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
956 label = plab->parameter->value.octet_string->data;
957 /* Stop label being freed when OAEP parameters are freed */
958 plab->parameter->value.octet_string->data = NULL;
959 labellen = plab->parameter->value.octet_string->length;
962 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
964 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
966 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
968 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
974 RSA_OAEP_PARAMS_free(oaep);
978 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
980 const EVP_MD *md, *mgf1md;
981 RSA_OAEP_PARAMS *oaep = NULL;
982 ASN1_STRING *os = NULL;
984 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
985 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
986 unsigned char *label;
988 if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
991 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
994 if (pad_mode == RSA_PKCS1_PADDING) {
995 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
999 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
1001 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
1003 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
1005 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
1008 oaep = RSA_OAEP_PARAMS_new();
1011 if (!rsa_md_to_algor(&oaep->hashFunc, md))
1013 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
1016 ASN1_OCTET_STRING *los;
1017 oaep->pSourceFunc = X509_ALGOR_new();
1018 if (oaep->pSourceFunc == NULL)
1020 los = ASN1_OCTET_STRING_new();
1023 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
1024 ASN1_OCTET_STRING_free(los);
1027 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
1028 V_ASN1_OCTET_STRING, los);
1030 /* create string with pss parameter encoding. */
1031 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
1033 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
1037 RSA_OAEP_PARAMS_free(oaep);
1038 ASN1_STRING_free(os);
1043 static int rsa_pkey_check(const EVP_PKEY *pkey)
1045 return RSA_check_key_ex(pkey->pkey.rsa, NULL);
1048 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
1052 ASN1_PKEY_SIGPARAM_NULL,
1055 "OpenSSL RSA method",
1075 old_rsa_priv_decode,
1076 old_rsa_priv_encode,
1089 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
1092 ASN1_PKEY_SIGPARAM_NULL,
1095 "OpenSSL RSA-PSS method",