2 * Copyright 2006-2016 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 /* Set any parameters associated with pkey */
28 static int rsa_param_encode(const EVP_PKEY *pkey,
29 ASN1_STRING **pstr, int *pstrtype)
31 const RSA *rsa = pkey->pkey.rsa;
33 /* If RSA it's just NULL type */
34 if (pkey->ameth->pkey_id == EVP_PKEY_RSA) {
35 *pstrtype = V_ASN1_NULL;
38 /* If no PSS parameters we omit parameters entirely */
39 if (rsa->pss == NULL) {
40 *pstrtype = V_ASN1_UNDEF;
43 /* Encode PSS parameters */
44 if (!ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr)) {
45 ASN1_STRING_free(*pstr);
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)
67 rsa->pss = ASN1_item_unpack(algp, ASN1_ITEM_rptr(RSA_PSS_PARAMS));
73 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
75 unsigned char *penc = NULL;
79 if (!rsa_param_encode(pkey, &str, &strtype))
81 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
84 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
85 strtype, str, penc, penclen))
92 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
94 const unsigned char *p;
99 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
101 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
102 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
105 if (!rsa_param_decode(rsa, alg)) {
109 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
113 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
115 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
116 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
121 static int old_rsa_priv_decode(EVP_PKEY *pkey,
122 const unsigned char **pder, int derlen)
126 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
127 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
130 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
134 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
136 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
139 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
141 unsigned char *rk = NULL;
145 if (!rsa_param_encode(pkey, &str, &strtype))
147 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
150 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
154 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
155 strtype, str, rk, rklen)) {
156 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
163 static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
165 const unsigned char *p;
168 const X509_ALGOR *alg;
170 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
172 rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
174 RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
177 if (!rsa_param_decode(rsa, alg)) {
181 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
185 static int int_rsa_size(const EVP_PKEY *pkey)
187 return RSA_size(pkey->pkey.rsa);
190 static int rsa_bits(const EVP_PKEY *pkey)
192 return BN_num_bits(pkey->pkey.rsa->n);
195 static int rsa_security_bits(const EVP_PKEY *pkey)
197 return RSA_security_bits(pkey->pkey.rsa);
200 static void int_rsa_free(EVP_PKEY *pkey)
202 RSA_free(pkey->pkey.rsa);
205 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
207 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
209 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
213 static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
217 X509_ALGOR *maskHash = NULL;
218 if (!BIO_indent(bp, indent, 128))
222 if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
226 if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
229 } else if (pss == NULL) {
230 if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
234 if (BIO_puts(bp, "\n") <= 0)
238 if (!BIO_indent(bp, indent, 128))
240 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
243 if (pss->hashAlgorithm) {
244 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
246 } else if (BIO_puts(bp, "sha1 (default)") <= 0)
249 if (BIO_puts(bp, "\n") <= 0)
252 if (!BIO_indent(bp, indent, 128))
255 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
257 if (pss->maskGenAlgorithm) {
258 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
260 if (BIO_puts(bp, " with ") <= 0)
262 maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
263 if (maskHash != NULL) {
264 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
266 } else if (BIO_puts(bp, "INVALID") <= 0)
268 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
272 if (!BIO_indent(bp, indent, 128))
274 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
276 if (pss->saltLength) {
277 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
279 } else if (BIO_puts(bp, "14 (default)") <= 0)
283 if (!BIO_indent(bp, indent, 128))
285 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
287 if (pss->trailerField) {
288 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
290 } else if (BIO_puts(bp, "BC (default)") <= 0)
297 X509_ALGOR_free(maskHash);
302 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
304 const RSA *x = pkey->pkey.rsa;
307 int ret = 0, mod_len = 0;
308 int is_pss = pkey->ameth->pkey_id == EVP_PKEY_RSA_PSS;
311 mod_len = BN_num_bits(x->n);
313 if (!BIO_indent(bp, off, 128))
316 if (BIO_printf(bp, "%s ", is_pss ? "RSA-PSS" : "RSA") <= 0)
320 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0)
323 s = "publicExponent:";
325 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
330 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
332 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
335 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
337 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
339 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
341 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
343 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
345 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
348 if (is_pss && !rsa_pss_param_print(bp, 1, x->pss, off))
355 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
358 return pkey_rsa_print(bp, pkey, indent, 0);
361 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
364 return pkey_rsa_print(bp, pkey, indent, 1);
367 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
371 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
377 if (pss->maskGenAlgorithm != NULL) {
378 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
379 if (pss->maskHash == NULL) {
380 RSA_PSS_PARAMS_free(pss);
388 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
389 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
391 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
394 pss = rsa_pss_decode(sigalg);
395 rv = rsa_pss_param_print(bp, 0, pss, indent);
396 RSA_PSS_PARAMS_free(pss);
399 } else if (!sig && BIO_puts(bp, "\n") <= 0)
402 return X509_signature_dump(bp, sig, indent);
406 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
408 X509_ALGOR *alg = NULL;
411 case ASN1_PKEY_CTRL_PKCS7_SIGN:
413 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
416 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
418 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
420 #ifndef OPENSSL_NO_CMS
421 case ASN1_PKEY_CTRL_CMS_SIGN:
423 return rsa_cms_sign(arg2);
425 return rsa_cms_verify(arg2);
428 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
430 return rsa_cms_encrypt(arg2);
432 return rsa_cms_decrypt(arg2);
435 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
436 *(int *)arg2 = CMS_RECIPINFO_TRANS;
440 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
441 *(int *)arg2 = NID_sha256;
450 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
456 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
457 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
459 if (md == NULL || EVP_MD_type(md) == NID_sha1)
461 *palg = X509_ALGOR_new();
464 X509_ALGOR_set_md(*palg, md);
468 /* Allocate and set MGF1 algorithm ID from EVP_MD */
469 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
471 X509_ALGOR *algtmp = NULL;
472 ASN1_STRING *stmp = NULL;
474 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
476 /* need to embed algorithm ID inside another */
477 if (!rsa_md_to_algor(&algtmp, mgf1md))
479 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
481 *palg = X509_ALGOR_new();
484 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
487 ASN1_STRING_free(stmp);
488 X509_ALGOR_free(algtmp);
494 /* convert algorithm ID to EVP_MD, default SHA1 */
495 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
500 md = EVP_get_digestbyobj(alg->algorithm);
502 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
507 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
508 * suitable for setting an AlgorithmIdentifier.
511 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
513 const EVP_MD *sigmd, *mgf1md;
514 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
516 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
518 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
520 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
523 saltlen = EVP_MD_size(sigmd);
524 else if (saltlen == -2) {
525 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
526 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
530 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
533 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
534 const EVP_MD *mgf1md, int saltlen)
536 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
540 pss->saltLength = ASN1_INTEGER_new();
541 if (pss->saltLength == NULL)
543 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
546 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
550 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
554 RSA_PSS_PARAMS_free(pss);
558 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
560 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
561 ASN1_STRING *os = NULL;
565 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) {
566 ASN1_STRING_free(os);
569 RSA_PSS_PARAMS_free(pss);
574 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
575 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
576 * passed to pkctx instead.
579 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
580 X509_ALGOR *sigalg, EVP_PKEY *pkey)
584 const EVP_MD *mgf1md = NULL, *md = NULL;
586 /* Sanity check: make sure it is PSS */
587 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
588 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
591 /* Decode PSS parameters */
592 pss = rsa_pss_decode(sigalg);
595 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
598 mgf1md = rsa_algor_to_md(pss->maskHash);
601 md = rsa_algor_to_md(pss->hashAlgorithm);
605 if (pss->saltLength) {
606 saltlen = ASN1_INTEGER_get(pss->saltLength);
609 * Could perform more salt length sanity checks but the main RSA
610 * routines will trap other invalid values anyway.
613 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
620 * low-level routines support only trailer field 0xbc (value 1) and
621 * PKCS#1 says we should reject any other value anyway.
623 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
624 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
628 /* We have all parameters now set up context */
631 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
634 const EVP_MD *checkmd;
635 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
637 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
638 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
643 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
646 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
649 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
655 RSA_PSS_PARAMS_free(pss);
659 #ifndef OPENSSL_NO_CMS
660 static int rsa_cms_verify(CMS_SignerInfo *si)
664 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
665 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
666 nid = OBJ_obj2nid(alg->algorithm);
667 if (nid == NID_rsaEncryption)
669 if (nid == EVP_PKEY_RSA_PSS)
670 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
671 /* Workaround for some implementation that use a signature OID */
672 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
673 if (nid2 == NID_rsaEncryption)
681 * Customised RSA item verification routine. This is called when a signature
682 * is encountered requiring special handling. We currently only handle PSS.
685 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
686 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
689 /* Sanity check: make sure it is PSS */
690 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
691 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
694 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
701 #ifndef OPENSSL_NO_CMS
702 static int rsa_cms_sign(CMS_SignerInfo *si)
704 int pad_mode = RSA_PKCS1_PADDING;
706 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
707 ASN1_STRING *os = NULL;
708 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
710 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
713 if (pad_mode == RSA_PKCS1_PADDING) {
714 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
717 /* We don't support it */
718 if (pad_mode != RSA_PKCS1_PSS_PADDING)
720 os = rsa_ctx_to_pss_string(pkctx);
723 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
728 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
729 X509_ALGOR *alg1, X509_ALGOR *alg2,
730 ASN1_BIT_STRING *sig)
733 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
734 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
736 if (pad_mode == RSA_PKCS1_PADDING)
738 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
739 ASN1_STRING *os1 = NULL;
740 os1 = rsa_ctx_to_pss_string(pkctx);
743 /* Duplicate parameters if we have to */
745 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
747 ASN1_STRING_free(os1);
750 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
751 V_ASN1_SEQUENCE, os2);
753 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
754 V_ASN1_SEQUENCE, os1);
760 #ifndef OPENSSL_NO_CMS
761 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
763 RSA_OAEP_PARAMS *oaep;
765 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
771 if (oaep->maskGenFunc != NULL) {
772 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
773 if (oaep->maskHash == NULL) {
774 RSA_OAEP_PARAMS_free(oaep);
781 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
787 unsigned char *label = NULL;
789 const EVP_MD *mgf1md = NULL, *md = NULL;
790 RSA_OAEP_PARAMS *oaep;
791 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
794 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
796 nid = OBJ_obj2nid(cmsalg->algorithm);
797 if (nid == NID_rsaEncryption)
799 if (nid != NID_rsaesOaep) {
800 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
803 /* Decode OAEP parameters */
804 oaep = rsa_oaep_decode(cmsalg);
807 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
811 mgf1md = rsa_algor_to_md(oaep->maskHash);
814 md = rsa_algor_to_md(oaep->hashFunc);
818 if (oaep->pSourceFunc) {
819 X509_ALGOR *plab = oaep->pSourceFunc;
820 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
821 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
824 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
825 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
829 label = plab->parameter->value.octet_string->data;
830 /* Stop label being freed when OAEP parameters are freed */
831 plab->parameter->value.octet_string->data = NULL;
832 labellen = plab->parameter->value.octet_string->length;
835 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
837 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
839 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
841 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
847 RSA_OAEP_PARAMS_free(oaep);
851 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
853 const EVP_MD *md, *mgf1md;
854 RSA_OAEP_PARAMS *oaep = NULL;
855 ASN1_STRING *os = NULL;
857 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
858 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
859 unsigned char *label;
860 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
862 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
865 if (pad_mode == RSA_PKCS1_PADDING) {
866 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
870 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
872 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
874 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
876 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
879 oaep = RSA_OAEP_PARAMS_new();
882 if (!rsa_md_to_algor(&oaep->hashFunc, md))
884 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
887 ASN1_OCTET_STRING *los;
888 oaep->pSourceFunc = X509_ALGOR_new();
889 if (oaep->pSourceFunc == NULL)
891 los = ASN1_OCTET_STRING_new();
894 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
895 ASN1_OCTET_STRING_free(los);
898 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
899 V_ASN1_OCTET_STRING, los);
901 /* create string with pss parameter encoding. */
902 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
904 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
908 RSA_OAEP_PARAMS_free(oaep);
909 ASN1_STRING_free(os);
914 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
918 ASN1_PKEY_SIGPARAM_NULL,
921 "OpenSSL RSA method",
952 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
955 ASN1_PKEY_SIGPARAM_NULL,
958 "OpenSSL RSA-PSS method",