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 "internal/asn1_int.h"
17 #include "internal/evp_int.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;
464 case ASN1_PKEY_CTRL_PKCS7_SIGN:
466 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
469 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
470 if (pkey_is_pss(pkey))
473 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
475 #ifndef OPENSSL_NO_CMS
476 case ASN1_PKEY_CTRL_CMS_SIGN:
478 return rsa_cms_sign(arg2);
480 return rsa_cms_verify(arg2);
483 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
484 if (pkey_is_pss(pkey))
487 return rsa_cms_encrypt(arg2);
489 return rsa_cms_decrypt(arg2);
492 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
493 if (pkey_is_pss(pkey))
495 *(int *)arg2 = CMS_RECIPINFO_TRANS;
499 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
500 *(int *)arg2 = NID_sha256;
509 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
515 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
516 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
518 if (md == NULL || EVP_MD_type(md) == NID_sha1)
520 *palg = X509_ALGOR_new();
523 X509_ALGOR_set_md(*palg, md);
527 /* Allocate and set MGF1 algorithm ID from EVP_MD */
528 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
530 X509_ALGOR *algtmp = NULL;
531 ASN1_STRING *stmp = NULL;
534 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
536 /* need to embed algorithm ID inside another */
537 if (!rsa_md_to_algor(&algtmp, mgf1md))
539 if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
541 *palg = X509_ALGOR_new();
544 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
547 ASN1_STRING_free(stmp);
548 X509_ALGOR_free(algtmp);
554 /* convert algorithm ID to EVP_MD, default SHA1 */
555 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
561 md = EVP_get_digestbyobj(alg->algorithm);
563 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
568 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
569 * suitable for setting an AlgorithmIdentifier.
572 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
574 const EVP_MD *sigmd, *mgf1md;
575 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
578 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
580 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
582 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
585 saltlen = EVP_MD_size(sigmd);
586 } else if (saltlen == -2 || saltlen == -3) {
587 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
588 if ((EVP_PKEY_bits(pk) & 0x7) == 1)
594 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
597 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
598 const EVP_MD *mgf1md, int saltlen)
600 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
605 pss->saltLength = ASN1_INTEGER_new();
606 if (pss->saltLength == NULL)
608 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
611 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
615 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
617 if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
621 RSA_PSS_PARAMS_free(pss);
625 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
627 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
633 os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
634 RSA_PSS_PARAMS_free(pss);
639 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
640 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
641 * passed to pkctx instead.
644 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
645 X509_ALGOR *sigalg, EVP_PKEY *pkey)
649 const EVP_MD *mgf1md = NULL, *md = NULL;
652 /* Sanity check: make sure it is PSS */
653 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
654 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
657 /* Decode PSS parameters */
658 pss = rsa_pss_decode(sigalg);
660 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
661 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
665 /* We have all parameters now set up context */
667 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
670 const EVP_MD *checkmd;
671 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
673 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
674 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
679 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
682 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
685 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
691 RSA_PSS_PARAMS_free(pss);
695 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
696 const EVP_MD **pmgf1md, int *psaltlen)
700 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
703 *pmgf1md = rsa_algor_to_md(pss->maskHash);
704 if (*pmgf1md == NULL)
706 if (pss->saltLength) {
707 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
709 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
717 * low-level routines support only trailer field 0xbc (value 1) and
718 * PKCS#1 says we should reject any other value anyway.
720 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
721 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
728 #ifndef OPENSSL_NO_CMS
729 static int rsa_cms_verify(CMS_SignerInfo *si)
733 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
735 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
736 nid = OBJ_obj2nid(alg->algorithm);
737 if (nid == EVP_PKEY_RSA_PSS)
738 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
739 /* Only PSS allowed for PSS keys */
740 if (pkey_ctx_is_pss(pkctx)) {
741 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
744 if (nid == NID_rsaEncryption)
746 /* Workaround for some implementation that use a signature OID */
747 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
748 if (nid2 == NID_rsaEncryption)
756 * Customised RSA item verification routine. This is called when a signature
757 * is encountered requiring special handling. We currently only handle PSS.
760 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
761 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
764 /* Sanity check: make sure it is PSS */
765 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
766 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
769 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
776 #ifndef OPENSSL_NO_CMS
777 static int rsa_cms_sign(CMS_SignerInfo *si)
779 int pad_mode = RSA_PKCS1_PADDING;
781 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
782 ASN1_STRING *os = NULL;
784 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
786 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
789 if (pad_mode == RSA_PKCS1_PADDING) {
790 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
793 /* We don't support it */
794 if (pad_mode != RSA_PKCS1_PSS_PADDING)
796 os = rsa_ctx_to_pss_string(pkctx);
799 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
804 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
805 X509_ALGOR *alg1, X509_ALGOR *alg2,
806 ASN1_BIT_STRING *sig)
809 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
811 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
813 if (pad_mode == RSA_PKCS1_PADDING)
815 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
816 ASN1_STRING *os1 = NULL;
817 os1 = rsa_ctx_to_pss_string(pkctx);
820 /* Duplicate parameters if we have to */
822 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
824 ASN1_STRING_free(os1);
827 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
828 V_ASN1_SEQUENCE, os2);
830 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
831 V_ASN1_SEQUENCE, os1);
837 static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
838 const ASN1_STRING *sig)
843 const EVP_MD *mgf1md = NULL, *md = NULL;
846 /* Sanity check: make sure it is PSS */
847 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
849 /* Decode PSS parameters */
850 pss = rsa_pss_decode(sigalg);
851 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
853 mdnid = EVP_MD_type(md);
855 * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
856 * match and salt length must equal digest size
858 if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
859 && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
860 flags = X509_SIG_INFO_TLS;
863 /* Note: security bits half number of digest bits */
864 X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, EVP_MD_size(md) * 4,
868 RSA_PSS_PARAMS_free(pss);
872 #ifndef OPENSSL_NO_CMS
873 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
875 RSA_OAEP_PARAMS *oaep;
877 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
883 if (oaep->maskGenFunc != NULL) {
884 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
885 if (oaep->maskHash == NULL) {
886 RSA_OAEP_PARAMS_free(oaep);
893 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
899 unsigned char *label = NULL;
901 const EVP_MD *mgf1md = NULL, *md = NULL;
902 RSA_OAEP_PARAMS *oaep;
904 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
907 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
909 nid = OBJ_obj2nid(cmsalg->algorithm);
910 if (nid == NID_rsaEncryption)
912 if (nid != NID_rsaesOaep) {
913 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
916 /* Decode OAEP parameters */
917 oaep = rsa_oaep_decode(cmsalg);
920 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
924 mgf1md = rsa_algor_to_md(oaep->maskHash);
927 md = rsa_algor_to_md(oaep->hashFunc);
931 if (oaep->pSourceFunc != NULL) {
932 X509_ALGOR *plab = oaep->pSourceFunc;
934 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
935 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
938 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
939 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
943 label = plab->parameter->value.octet_string->data;
944 /* Stop label being freed when OAEP parameters are freed */
945 plab->parameter->value.octet_string->data = NULL;
946 labellen = plab->parameter->value.octet_string->length;
949 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
951 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
953 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
955 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
961 RSA_OAEP_PARAMS_free(oaep);
965 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
967 const EVP_MD *md, *mgf1md;
968 RSA_OAEP_PARAMS *oaep = NULL;
969 ASN1_STRING *os = NULL;
971 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
972 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
973 unsigned char *label;
975 if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
978 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
981 if (pad_mode == RSA_PKCS1_PADDING) {
982 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
986 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
988 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
990 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
992 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
995 oaep = RSA_OAEP_PARAMS_new();
998 if (!rsa_md_to_algor(&oaep->hashFunc, md))
1000 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
1003 ASN1_OCTET_STRING *los;
1004 oaep->pSourceFunc = X509_ALGOR_new();
1005 if (oaep->pSourceFunc == NULL)
1007 los = ASN1_OCTET_STRING_new();
1010 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
1011 ASN1_OCTET_STRING_free(los);
1014 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
1015 V_ASN1_OCTET_STRING, los);
1017 /* create string with pss parameter encoding. */
1018 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
1020 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
1024 RSA_OAEP_PARAMS_free(oaep);
1025 ASN1_STRING_free(os);
1030 static int rsa_pkey_check(const EVP_PKEY *pkey)
1032 return RSA_check_key_ex(pkey->pkey.rsa, NULL);
1035 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
1039 ASN1_PKEY_SIGPARAM_NULL,
1042 "OpenSSL RSA method",
1062 old_rsa_priv_decode,
1063 old_rsa_priv_encode,
1076 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
1079 ASN1_PKEY_SIGPARAM_NULL,
1082 "OpenSSL RSA-PSS method",