2 * Copyright 2006-2017 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) {
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)
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 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
116 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
118 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
119 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
124 static int old_rsa_priv_decode(EVP_PKEY *pkey,
125 const unsigned char **pder, int derlen)
129 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
130 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
133 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
137 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
139 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
142 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
144 unsigned char *rk = NULL;
149 if (!rsa_param_encode(pkey, &str, &strtype))
151 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
154 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
155 ASN1_STRING_free(str);
159 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
160 strtype, str, rk, rklen)) {
161 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
162 ASN1_STRING_free(str);
169 static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
171 const unsigned char *p;
174 const X509_ALGOR *alg;
176 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
178 rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
180 RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
183 if (!rsa_param_decode(rsa, alg)) {
187 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
191 static int int_rsa_size(const EVP_PKEY *pkey)
193 return RSA_size(pkey->pkey.rsa);
196 static int rsa_bits(const EVP_PKEY *pkey)
198 return BN_num_bits(pkey->pkey.rsa->n);
201 static int rsa_security_bits(const EVP_PKEY *pkey)
203 return RSA_security_bits(pkey->pkey.rsa);
206 static void int_rsa_free(EVP_PKEY *pkey)
208 RSA_free(pkey->pkey.rsa);
211 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
213 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
215 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
219 static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
223 X509_ALGOR *maskHash = NULL;
225 if (!BIO_indent(bp, indent, 128))
229 if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
233 if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
236 } else if (pss == NULL) {
237 if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
241 if (BIO_puts(bp, "\n") <= 0)
245 if (!BIO_indent(bp, indent, 128))
247 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
250 if (pss->hashAlgorithm) {
251 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
253 } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
257 if (BIO_puts(bp, "\n") <= 0)
260 if (!BIO_indent(bp, indent, 128))
263 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
265 if (pss->maskGenAlgorithm) {
266 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
268 if (BIO_puts(bp, " with ") <= 0)
270 maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
271 if (maskHash != NULL) {
272 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
274 } else if (BIO_puts(bp, "INVALID") <= 0) {
277 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
282 if (!BIO_indent(bp, indent, 128))
284 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
286 if (pss->saltLength) {
287 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
289 } else if (BIO_puts(bp, "14 (default)") <= 0) {
294 if (!BIO_indent(bp, indent, 128))
296 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
298 if (pss->trailerField) {
299 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
301 } else if (BIO_puts(bp, "BC (default)") <= 0) {
309 X509_ALGOR_free(maskHash);
314 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
316 const RSA *x = pkey->pkey.rsa;
319 int ret = 0, mod_len = 0;
322 mod_len = BN_num_bits(x->n);
324 if (!BIO_indent(bp, off, 128))
327 if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
331 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0)
334 s = "publicExponent:";
336 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
341 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
343 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
346 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
348 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
350 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
352 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
354 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
356 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
359 if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
366 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
369 return pkey_rsa_print(bp, pkey, indent, 0);
372 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
375 return pkey_rsa_print(bp, pkey, indent, 1);
378 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
382 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
388 if (pss->maskGenAlgorithm != NULL) {
389 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
390 if (pss->maskHash == NULL) {
391 RSA_PSS_PARAMS_free(pss);
399 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
400 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
402 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
404 RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
406 rv = rsa_pss_param_print(bp, 0, pss, indent);
407 RSA_PSS_PARAMS_free(pss);
410 } else if (!sig && BIO_puts(bp, "\n") <= 0) {
414 return X509_signature_dump(bp, sig, indent);
418 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
420 X509_ALGOR *alg = NULL;
424 case ASN1_PKEY_CTRL_PKCS7_SIGN:
426 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
429 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
430 if (pkey_is_pss(pkey))
433 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
435 #ifndef OPENSSL_NO_CMS
436 case ASN1_PKEY_CTRL_CMS_SIGN:
438 return rsa_cms_sign(arg2);
440 return rsa_cms_verify(arg2);
443 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
444 if (pkey_is_pss(pkey))
447 return rsa_cms_encrypt(arg2);
449 return rsa_cms_decrypt(arg2);
452 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
453 if (pkey_is_pss(pkey))
455 *(int *)arg2 = CMS_RECIPINFO_TRANS;
459 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
460 *(int *)arg2 = NID_sha256;
469 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
475 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
476 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
478 if (md == NULL || EVP_MD_type(md) == NID_sha1)
480 *palg = X509_ALGOR_new();
483 X509_ALGOR_set_md(*palg, md);
487 /* Allocate and set MGF1 algorithm ID from EVP_MD */
488 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
490 X509_ALGOR *algtmp = NULL;
491 ASN1_STRING *stmp = NULL;
494 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
496 /* need to embed algorithm ID inside another */
497 if (!rsa_md_to_algor(&algtmp, mgf1md))
499 if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
501 *palg = X509_ALGOR_new();
504 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
507 ASN1_STRING_free(stmp);
508 X509_ALGOR_free(algtmp);
514 /* convert algorithm ID to EVP_MD, default SHA1 */
515 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
521 md = EVP_get_digestbyobj(alg->algorithm);
523 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
528 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
529 * suitable for setting an AlgorithmIdentifier.
532 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
534 const EVP_MD *sigmd, *mgf1md;
535 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
538 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
540 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
542 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
545 saltlen = EVP_MD_size(sigmd);
546 } else if (saltlen == -2) {
547 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
548 if ((EVP_PKEY_bits(pk) & 0x7) == 1)
552 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
555 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
556 const EVP_MD *mgf1md, int saltlen)
558 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
563 pss->saltLength = ASN1_INTEGER_new();
564 if (pss->saltLength == NULL)
566 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
569 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
573 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
575 if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
579 RSA_PSS_PARAMS_free(pss);
583 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
585 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
591 os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
592 RSA_PSS_PARAMS_free(pss);
597 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
598 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
599 * passed to pkctx instead.
602 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
603 X509_ALGOR *sigalg, EVP_PKEY *pkey)
607 const EVP_MD *mgf1md = NULL, *md = NULL;
610 /* Sanity check: make sure it is PSS */
611 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
612 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
615 /* Decode PSS parameters */
616 pss = rsa_pss_decode(sigalg);
618 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
619 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
623 /* We have all parameters now set up context */
625 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
628 const EVP_MD *checkmd;
629 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
631 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
632 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
637 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
640 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
643 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
649 RSA_PSS_PARAMS_free(pss);
653 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
654 const EVP_MD **pmgf1md, int *psaltlen)
658 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
661 *pmgf1md = rsa_algor_to_md(pss->maskHash);
662 if (*pmgf1md == NULL)
664 if (pss->saltLength) {
665 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
667 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
675 * low-level routines support only trailer field 0xbc (value 1) and
676 * PKCS#1 says we should reject any other value anyway.
678 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
679 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
686 #ifndef OPENSSL_NO_CMS
687 static int rsa_cms_verify(CMS_SignerInfo *si)
691 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
693 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
694 nid = OBJ_obj2nid(alg->algorithm);
695 if (nid == EVP_PKEY_RSA_PSS)
696 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
697 /* Only PSS allowed for PSS keys */
698 if (pkey_ctx_is_pss(pkctx)) {
699 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
702 if (nid == NID_rsaEncryption)
704 /* Workaround for some implementation that use a signature OID */
705 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
706 if (nid2 == NID_rsaEncryption)
714 * Customised RSA item verification routine. This is called when a signature
715 * is encountered requiring special handling. We currently only handle PSS.
718 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
719 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
722 /* Sanity check: make sure it is PSS */
723 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
724 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
727 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
734 #ifndef OPENSSL_NO_CMS
735 static int rsa_cms_sign(CMS_SignerInfo *si)
737 int pad_mode = RSA_PKCS1_PADDING;
739 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
740 ASN1_STRING *os = NULL;
742 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
744 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
747 if (pad_mode == RSA_PKCS1_PADDING) {
748 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
751 /* We don't support it */
752 if (pad_mode != RSA_PKCS1_PSS_PADDING)
754 os = rsa_ctx_to_pss_string(pkctx);
757 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
762 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
763 X509_ALGOR *alg1, X509_ALGOR *alg2,
764 ASN1_BIT_STRING *sig)
767 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
769 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
771 if (pad_mode == RSA_PKCS1_PADDING)
773 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
774 ASN1_STRING *os1 = NULL;
775 os1 = rsa_ctx_to_pss_string(pkctx);
778 /* Duplicate parameters if we have to */
780 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
782 ASN1_STRING_free(os1);
785 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
786 V_ASN1_SEQUENCE, os2);
788 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
789 V_ASN1_SEQUENCE, os1);
795 static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
796 const ASN1_STRING *sig)
801 const EVP_MD *mgf1md = NULL, *md = NULL;
804 /* Sanity check: make sure it is PSS */
805 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
807 /* Decode PSS parameters */
808 pss = rsa_pss_decode(sigalg);
809 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
811 mdnid = EVP_MD_type(md);
813 * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
814 * match and salt length must equal digest size
816 if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
817 && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
818 flags = X509_SIG_INFO_TLS;
821 /* Note: security bits half number of digest bits */
822 X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, EVP_MD_size(md) * 4,
826 RSA_PSS_PARAMS_free(pss);
830 #ifndef OPENSSL_NO_CMS
831 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
833 RSA_OAEP_PARAMS *oaep;
835 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
841 if (oaep->maskGenFunc != NULL) {
842 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
843 if (oaep->maskHash == NULL) {
844 RSA_OAEP_PARAMS_free(oaep);
851 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
857 unsigned char *label = NULL;
859 const EVP_MD *mgf1md = NULL, *md = NULL;
860 RSA_OAEP_PARAMS *oaep;
862 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
865 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
867 nid = OBJ_obj2nid(cmsalg->algorithm);
868 if (nid == NID_rsaEncryption)
870 if (nid != NID_rsaesOaep) {
871 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
874 /* Decode OAEP parameters */
875 oaep = rsa_oaep_decode(cmsalg);
878 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
882 mgf1md = rsa_algor_to_md(oaep->maskHash);
885 md = rsa_algor_to_md(oaep->hashFunc);
889 if (oaep->pSourceFunc != NULL) {
890 X509_ALGOR *plab = oaep->pSourceFunc;
892 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
893 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
896 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
897 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
901 label = plab->parameter->value.octet_string->data;
902 /* Stop label being freed when OAEP parameters are freed */
903 plab->parameter->value.octet_string->data = NULL;
904 labellen = plab->parameter->value.octet_string->length;
907 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
909 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
911 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
913 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
919 RSA_OAEP_PARAMS_free(oaep);
923 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
925 const EVP_MD *md, *mgf1md;
926 RSA_OAEP_PARAMS *oaep = NULL;
927 ASN1_STRING *os = NULL;
929 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
930 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
931 unsigned char *label;
933 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
935 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
938 if (pad_mode == RSA_PKCS1_PADDING) {
939 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
943 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
945 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
947 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
949 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
952 oaep = RSA_OAEP_PARAMS_new();
955 if (!rsa_md_to_algor(&oaep->hashFunc, md))
957 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
960 ASN1_OCTET_STRING *los;
961 oaep->pSourceFunc = X509_ALGOR_new();
962 if (oaep->pSourceFunc == NULL)
964 los = ASN1_OCTET_STRING_new();
967 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
968 ASN1_OCTET_STRING_free(los);
971 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
972 V_ASN1_OCTET_STRING, los);
974 /* create string with pss parameter encoding. */
975 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
977 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
981 RSA_OAEP_PARAMS_free(oaep);
982 ASN1_STRING_free(os);
987 static int rsa_pkey_check(const EVP_PKEY *pkey)
989 return RSA_check_key_ex(pkey->pkey.rsa, NULL);
992 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
996 ASN1_PKEY_SIGPARAM_NULL,
999 "OpenSSL RSA method",
1019 old_rsa_priv_decode,
1020 old_rsa_priv_encode,
1033 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
1036 ASN1_PKEY_SIGPARAM_NULL,
1039 "OpenSSL RSA-PSS method",