1 /* crypto/rsa/rsa_ameth.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/asn1t.h>
62 #include <openssl/x509.h>
63 #include <openssl/rsa.h>
64 #include <openssl/bn.h>
65 #ifndef OPENSSL_NO_CMS
66 #include <openssl/cms.h>
68 #include "asn1_locl.h"
70 static int rsa_cms_sign(CMS_SignerInfo *si);
71 static int rsa_cms_verify(CMS_SignerInfo *si);
72 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
73 static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
75 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
77 unsigned char *penc = NULL;
79 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
82 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
83 V_ASN1_NULL, NULL, penc, penclen))
90 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
92 const unsigned char *p;
95 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
97 if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen)))
99 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
102 EVP_PKEY_assign_RSA (pkey, rsa);
106 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
108 if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
109 || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
114 static int old_rsa_priv_decode(EVP_PKEY *pkey,
115 const unsigned char **pder, int derlen)
118 if (!(rsa = d2i_RSAPrivateKey (NULL, pder, derlen)))
120 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
123 EVP_PKEY_assign_RSA(pkey, rsa);
127 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
129 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
132 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
134 unsigned char *rk = NULL;
136 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
140 RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
144 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
145 V_ASN1_NULL, NULL, rk, rklen))
147 RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
154 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
156 const unsigned char *p;
158 if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
160 return old_rsa_priv_decode(pkey, &p, pklen);
163 static int int_rsa_size(const EVP_PKEY *pkey)
165 return RSA_size(pkey->pkey.rsa);
168 static int rsa_bits(const EVP_PKEY *pkey)
170 return BN_num_bits(pkey->pkey.rsa->n);
173 static int rsa_security_bits(const EVP_PKEY *pkey)
175 return RSA_security_bits(pkey->pkey.rsa);
178 static void int_rsa_free(EVP_PKEY *pkey)
180 RSA_free(pkey->pkey.rsa);
184 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
189 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
193 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
197 unsigned char *m=NULL;
198 int ret=0, mod_len = 0;
201 update_buflen(x->n, &buf_len);
202 update_buflen(x->e, &buf_len);
206 update_buflen(x->d, &buf_len);
207 update_buflen(x->p, &buf_len);
208 update_buflen(x->q, &buf_len);
209 update_buflen(x->dmp1, &buf_len);
210 update_buflen(x->dmq1, &buf_len);
211 update_buflen(x->iqmp, &buf_len);
214 m=(unsigned char *)OPENSSL_malloc(buf_len+10);
217 RSAerr(RSA_F_DO_RSA_PRINT,ERR_R_MALLOC_FAILURE);
222 mod_len = BN_num_bits(x->n);
224 if(!BIO_indent(bp,off,128))
229 if (BIO_printf(bp,"Private-Key: (%d bit)\n", mod_len)
232 s = "publicExponent:";
236 if (BIO_printf(bp,"Public-Key: (%d bit)\n", mod_len)
241 if (!ASN1_bn_print(bp,str,x->n,m,off)) goto err;
242 if (!ASN1_bn_print(bp,s,x->e,m,off))
246 if (!ASN1_bn_print(bp,"privateExponent:",x->d,m,off))
248 if (!ASN1_bn_print(bp,"prime1:",x->p,m,off))
250 if (!ASN1_bn_print(bp,"prime2:",x->q,m,off))
252 if (!ASN1_bn_print(bp,"exponent1:",x->dmp1,m,off))
254 if (!ASN1_bn_print(bp,"exponent2:",x->dmq1,m,off))
256 if (!ASN1_bn_print(bp,"coefficient:",x->iqmp,m,off))
261 if (m != NULL) OPENSSL_free(m);
265 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
268 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
272 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
275 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
278 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
279 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
281 const unsigned char *p;
285 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
287 if (alg->parameter->type != V_ASN1_SEQUENCE)
290 p = alg->parameter->value.sequence->data;
291 plen = alg->parameter->value.sequence->length;
292 return d2i_X509_ALGOR(NULL, &p, plen);
295 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
296 X509_ALGOR **pmaskHash)
298 const unsigned char *p;
304 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
306 p = alg->parameter->value.sequence->data;
307 plen = alg->parameter->value.sequence->length;
308 pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);
313 *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
318 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
319 X509_ALGOR *maskHash, int indent)
324 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
328 if (BIO_puts(bp, "\n") <= 0)
330 if (!BIO_indent(bp, indent, 128))
332 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
335 if (pss->hashAlgorithm)
337 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
340 else if (BIO_puts(bp, "sha1 (default)") <= 0)
343 if (BIO_puts(bp, "\n") <= 0)
346 if (!BIO_indent(bp, indent, 128))
349 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
351 if (pss->maskGenAlgorithm)
353 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
355 if (BIO_puts(bp, " with ") <= 0)
359 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
362 else if (BIO_puts(bp, "INVALID") <= 0)
365 else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
369 if (!BIO_indent(bp, indent, 128))
371 if (BIO_puts(bp, "Salt Length: 0x") <= 0)
375 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
378 else if (BIO_puts(bp, "14 (default)") <= 0)
382 if (!BIO_indent(bp, indent, 128))
384 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
386 if (pss->trailerField)
388 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
391 else if (BIO_puts(bp, "BC (default)") <= 0)
402 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
403 const ASN1_STRING *sig,
404 int indent, ASN1_PCTX *pctx)
406 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss)
410 X509_ALGOR *maskHash;
411 pss = rsa_pss_decode(sigalg, &maskHash);
412 rv = rsa_pss_param_print(bp, pss, maskHash, indent);
414 RSA_PSS_PARAMS_free(pss);
416 X509_ALGOR_free(maskHash);
420 else if (!sig && BIO_puts(bp, "\n") <= 0)
423 return X509_signature_dump(bp, sig, indent);
427 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
429 X509_ALGOR *alg = NULL;
433 case ASN1_PKEY_CTRL_PKCS7_SIGN:
435 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
438 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
440 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
442 #ifndef OPENSSL_NO_CMS
443 case ASN1_PKEY_CTRL_CMS_SIGN:
445 return rsa_cms_sign(arg2);
447 return rsa_cms_verify(arg2);
450 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
452 return rsa_cms_encrypt(arg2);
454 return rsa_cms_decrypt(arg2);
457 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
458 *(int *)arg2 = CMS_RECIPINFO_TRANS;
462 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
463 *(int *)arg2 = NID_sha256;
472 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
479 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
480 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
482 if (EVP_MD_type(md) == NID_sha1)
484 *palg = X509_ALGOR_new();
487 X509_ALGOR_set_md(*palg, md);
491 /* Allocate and set MGF1 algorithm ID from EVP_MD */
492 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
494 X509_ALGOR *algtmp = NULL;
495 ASN1_STRING *stmp = NULL;
497 if (EVP_MD_type(mgf1md) == NID_sha1)
499 /* need to embed algorithm ID inside another */
500 if (!rsa_md_to_algor(&algtmp, mgf1md))
502 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
504 *palg = X509_ALGOR_new();
507 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
511 ASN1_STRING_free(stmp);
513 X509_ALGOR_free(algtmp);
519 /* convert algorithm ID to EVP_MD, default SHA1 */
520 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
525 md = EVP_get_digestbyobj(alg->algorithm);
527 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
530 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
531 static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
536 /* Check mask and lookup mask hash algorithm */
537 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
539 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
544 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
547 md = EVP_get_digestbyobj(maskHash->algorithm);
550 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
556 /* Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
557 * suitable for setting an AlgorithmIdentifier.
560 static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
562 const EVP_MD *sigmd, *mgf1md;
563 RSA_PSS_PARAMS *pss = NULL;
564 ASN1_STRING *os = NULL;
565 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
567 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
569 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
571 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
574 saltlen = EVP_MD_size(sigmd);
575 else if (saltlen == -2)
577 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
578 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
581 pss = RSA_PSS_PARAMS_new();
586 pss->saltLength = ASN1_INTEGER_new();
587 if (!pss->saltLength)
589 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
592 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
594 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
596 /* Finally create string with pss parameter encoding. */
597 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
602 RSA_PSS_PARAMS_free(pss);
606 ASN1_STRING_free(os);
610 /* From PSS AlgorithmIdentifier set public key parameters. If pkey
611 * isn't NULL then the EVP_MD_CTX is setup and initalised. If it
612 * is NULL parameters are passed to pkctx instead.
615 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
616 X509_ALGOR *sigalg, EVP_PKEY *pkey)
620 const EVP_MD *mgf1md = NULL, *md = NULL;
622 X509_ALGOR *maskHash;
623 /* Sanity check: make sure it is PSS */
624 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss)
626 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
629 /* Decode PSS parameters */
630 pss = rsa_pss_decode(sigalg, &maskHash);
634 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
637 mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
640 md = rsa_algor_to_md(pss->hashAlgorithm);
646 saltlen = ASN1_INTEGER_get(pss->saltLength);
648 /* Could perform more salt length sanity checks but the main
649 * RSA routines will trap other invalid values anyway.
653 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
660 /* low-level routines support only trailer field 0xbc (value 1)
661 * and PKCS#1 says we should reject any other value anyway.
663 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1)
665 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
669 /* We have all parameters now set up context */
673 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
678 const EVP_MD *checkmd;
679 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
681 if (EVP_MD_type(md) != EVP_MD_type(checkmd))
683 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
688 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
691 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
694 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
700 RSA_PSS_PARAMS_free(pss);
702 X509_ALGOR_free(maskHash);
706 static int rsa_cms_verify(CMS_SignerInfo *si)
710 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
711 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
712 nid = OBJ_obj2nid(alg->algorithm);
713 if (nid == NID_rsaEncryption)
715 if (nid == NID_rsassaPss)
716 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
717 /* Workaround for some implementation that use a signature OID */
718 if (OBJ_find_sigid_algs(nid, NULL, &nid2))
720 if (nid2 == NID_rsaEncryption)
726 /* Customised RSA item verification routine. This is called
727 * when a signature is encountered requiring special handling. We
728 * currently only handle PSS.
732 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
733 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
736 /* Sanity check: make sure it is PSS */
737 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss)
739 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
742 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey))
748 static int rsa_cms_sign(CMS_SignerInfo *si)
750 int pad_mode = RSA_PKCS1_PADDING;
752 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
753 ASN1_STRING *os = NULL;
754 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
757 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
760 if (pad_mode == RSA_PKCS1_PADDING)
762 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
766 /* We don't support it */
767 if (pad_mode != RSA_PKCS1_PSS_PADDING)
769 os = rsa_ctx_to_pss(pkctx);
772 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
776 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
777 X509_ALGOR *alg1, X509_ALGOR *alg2,
778 ASN1_BIT_STRING *sig)
781 EVP_PKEY_CTX *pkctx = ctx->pctx;
782 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
784 if (pad_mode == RSA_PKCS1_PADDING)
786 if (pad_mode == RSA_PKCS1_PSS_PADDING)
788 ASN1_STRING *os1 = NULL;
789 os1 = rsa_ctx_to_pss(pkctx);
792 /* Duplicate parameters if we have to */
795 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
798 ASN1_STRING_free(os1);
801 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
802 V_ASN1_SEQUENCE, os2);
804 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
805 V_ASN1_SEQUENCE, os1);
811 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
812 X509_ALGOR **pmaskHash)
814 const unsigned char *p;
816 RSA_OAEP_PARAMS *pss;
820 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
822 p = alg->parameter->value.sequence->data;
823 plen = alg->parameter->value.sequence->length;
824 pss = d2i_RSA_OAEP_PARAMS(NULL, &p, plen);
829 *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
834 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
840 unsigned char *label = NULL;
842 const EVP_MD *mgf1md = NULL, *md = NULL;
843 RSA_OAEP_PARAMS *oaep;
844 X509_ALGOR *maskHash;
845 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
848 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
850 nid = OBJ_obj2nid(cmsalg->algorithm);
851 if (nid == NID_rsaEncryption)
853 if (nid != NID_rsaesOaep)
855 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
858 /* Decode OAEP parameters */
859 oaep = rsa_oaep_decode(cmsalg, &maskHash);
863 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
867 mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
870 md = rsa_algor_to_md(oaep->hashFunc);
874 if (oaep->pSourceFunc)
876 X509_ALGOR *plab = oaep->pSourceFunc;
877 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified)
879 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
882 if (plab->parameter->type != V_ASN1_OCTET_STRING)
884 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
888 label = plab->parameter->value.octet_string->data;
889 /* Stop label being freed when OAEP parameters are freed */
890 plab->parameter->value.octet_string->data = NULL;
891 labellen = plab->parameter->value.octet_string->length;
894 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
896 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
898 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
900 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
906 RSA_OAEP_PARAMS_free(oaep);
908 X509_ALGOR_free(maskHash);
912 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
914 const EVP_MD *md, *mgf1md;
915 RSA_OAEP_PARAMS *oaep = NULL;
916 ASN1_STRING *os = NULL;
918 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
919 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
920 unsigned char *label;
921 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
924 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
927 if (pad_mode == RSA_PKCS1_PADDING)
929 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
934 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
936 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
938 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
940 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
943 oaep = RSA_OAEP_PARAMS_new();
946 if (!rsa_md_to_algor(&oaep->hashFunc, md))
948 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
952 ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
953 oaep->pSourceFunc = X509_ALGOR_new();
954 if (!oaep->pSourceFunc)
958 if (!ASN1_OCTET_STRING_set(los, label, labellen))
960 ASN1_OCTET_STRING_free(los);
963 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
964 V_ASN1_OCTET_STRING, los);
966 /* create string with pss parameter encoding. */
967 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
969 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
974 RSA_OAEP_PARAMS_free(oaep);
976 ASN1_STRING_free(os);
980 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] =
985 ASN1_PKEY_SIGPARAM_NULL,
988 "OpenSSL RSA method",
1008 old_rsa_priv_decode,
1009 old_rsa_priv_encode,