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 void int_rsa_free(EVP_PKEY *pkey)
175 RSA_free(pkey->pkey.rsa);
179 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
184 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
188 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
192 unsigned char *m=NULL;
193 int ret=0, mod_len = 0;
196 update_buflen(x->n, &buf_len);
197 update_buflen(x->e, &buf_len);
201 update_buflen(x->d, &buf_len);
202 update_buflen(x->p, &buf_len);
203 update_buflen(x->q, &buf_len);
204 update_buflen(x->dmp1, &buf_len);
205 update_buflen(x->dmq1, &buf_len);
206 update_buflen(x->iqmp, &buf_len);
209 m=(unsigned char *)OPENSSL_malloc(buf_len+10);
212 RSAerr(RSA_F_DO_RSA_PRINT,ERR_R_MALLOC_FAILURE);
217 mod_len = BN_num_bits(x->n);
219 if(!BIO_indent(bp,off,128))
224 if (BIO_printf(bp,"Private-Key: (%d bit)\n", mod_len)
227 s = "publicExponent:";
231 if (BIO_printf(bp,"Public-Key: (%d bit)\n", mod_len)
236 if (!ASN1_bn_print(bp,str,x->n,m,off)) goto err;
237 if (!ASN1_bn_print(bp,s,x->e,m,off))
241 if (!ASN1_bn_print(bp,"privateExponent:",x->d,m,off))
243 if (!ASN1_bn_print(bp,"prime1:",x->p,m,off))
245 if (!ASN1_bn_print(bp,"prime2:",x->q,m,off))
247 if (!ASN1_bn_print(bp,"exponent1:",x->dmp1,m,off))
249 if (!ASN1_bn_print(bp,"exponent2:",x->dmq1,m,off))
251 if (!ASN1_bn_print(bp,"coefficient:",x->iqmp,m,off))
256 if (m != NULL) OPENSSL_free(m);
260 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
263 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
267 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
270 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
273 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
274 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
276 const unsigned char *p;
280 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
282 if (alg->parameter->type != V_ASN1_SEQUENCE)
285 p = alg->parameter->value.sequence->data;
286 plen = alg->parameter->value.sequence->length;
287 return d2i_X509_ALGOR(NULL, &p, plen);
290 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
291 X509_ALGOR **pmaskHash)
293 const unsigned char *p;
299 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
301 p = alg->parameter->value.sequence->data;
302 plen = alg->parameter->value.sequence->length;
303 pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);
308 *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
313 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
314 X509_ALGOR *maskHash, int indent)
319 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
323 if (BIO_puts(bp, "\n") <= 0)
325 if (!BIO_indent(bp, indent, 128))
327 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
330 if (pss->hashAlgorithm)
332 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
335 else if (BIO_puts(bp, "sha1 (default)") <= 0)
338 if (BIO_puts(bp, "\n") <= 0)
341 if (!BIO_indent(bp, indent, 128))
344 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
346 if (pss->maskGenAlgorithm)
348 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
350 if (BIO_puts(bp, " with ") <= 0)
354 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
357 else if (BIO_puts(bp, "INVALID") <= 0)
360 else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
364 if (!BIO_indent(bp, indent, 128))
366 if (BIO_puts(bp, "Salt Length: 0x") <= 0)
370 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
373 else if (BIO_puts(bp, "14 (default)") <= 0)
377 if (!BIO_indent(bp, indent, 128))
379 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
381 if (pss->trailerField)
383 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
386 else if (BIO_puts(bp, "BC (default)") <= 0)
397 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
398 const ASN1_STRING *sig,
399 int indent, ASN1_PCTX *pctx)
401 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss)
405 X509_ALGOR *maskHash;
406 pss = rsa_pss_decode(sigalg, &maskHash);
407 rv = rsa_pss_param_print(bp, pss, maskHash, indent);
409 RSA_PSS_PARAMS_free(pss);
411 X509_ALGOR_free(maskHash);
415 else if (!sig && BIO_puts(bp, "\n") <= 0)
418 return X509_signature_dump(bp, sig, indent);
422 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
424 X509_ALGOR *alg = NULL;
428 case ASN1_PKEY_CTRL_PKCS7_SIGN:
430 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
433 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
435 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
437 #ifndef OPENSSL_NO_CMS
438 case ASN1_PKEY_CTRL_CMS_SIGN:
440 return rsa_cms_sign(arg2);
442 return rsa_cms_verify(arg2);
445 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
447 return rsa_cms_encrypt(arg2);
449 return rsa_cms_decrypt(arg2);
452 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
453 *(int *)arg2 = CMS_RECIPINFO_TRANS;
457 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
458 *(int *)arg2 = NID_sha256;
467 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
474 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
475 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
477 if (EVP_MD_type(md) == NID_sha1)
479 *palg = X509_ALGOR_new();
482 X509_ALGOR_set_md(*palg, md);
486 /* Allocate and set MGF1 algorithm ID from EVP_MD */
487 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
489 X509_ALGOR *algtmp = NULL;
490 ASN1_STRING *stmp = NULL;
492 if (EVP_MD_type(mgf1md) == NID_sha1)
494 /* need to embed algorithm ID inside another */
495 if (!rsa_md_to_algor(&algtmp, mgf1md))
497 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
499 *palg = X509_ALGOR_new();
502 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
506 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)
520 md = EVP_get_digestbyobj(alg->algorithm);
522 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
525 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
526 static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
531 /* Check mask and lookup mask hash algorithm */
532 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
534 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
539 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
542 md = EVP_get_digestbyobj(maskHash->algorithm);
545 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
551 /* Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
552 * suitable for setting an AlgorithmIdentifier.
555 static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
557 const EVP_MD *sigmd, *mgf1md;
558 RSA_PSS_PARAMS *pss = NULL;
559 ASN1_STRING *os = NULL;
560 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
562 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
564 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
566 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
569 saltlen = EVP_MD_size(sigmd);
570 else if (saltlen == -2)
572 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
573 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
576 pss = RSA_PSS_PARAMS_new();
581 pss->saltLength = ASN1_INTEGER_new();
582 if (!pss->saltLength)
584 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
587 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
589 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
591 /* Finally create string with pss parameter encoding. */
592 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
597 RSA_PSS_PARAMS_free(pss);
601 ASN1_STRING_free(os);
605 /* From PSS AlgorithmIdentifier set public key parameters. If pkey
606 * isn't NULL then the EVP_MD_CTX is setup and initalised. If it
607 * is NULL parameters are passed to pkctx instead.
610 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
611 X509_ALGOR *sigalg, EVP_PKEY *pkey)
615 const EVP_MD *mgf1md = NULL, *md = NULL;
617 X509_ALGOR *maskHash;
618 /* Sanity check: make sure it is PSS */
619 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss)
621 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
624 /* Decode PSS parameters */
625 pss = rsa_pss_decode(sigalg, &maskHash);
629 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
632 mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
635 md = rsa_algor_to_md(pss->hashAlgorithm);
641 saltlen = ASN1_INTEGER_get(pss->saltLength);
643 /* Could perform more salt length sanity checks but the main
644 * RSA routines will trap other invalid values anyway.
648 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
655 /* low-level routines support only trailer field 0xbc (value 1)
656 * and PKCS#1 says we should reject any other value anyway.
658 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1)
660 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
664 /* We have all parameters now set up context */
668 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
673 const EVP_MD *checkmd;
674 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
676 if (EVP_MD_type(md) != EVP_MD_type(checkmd))
678 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
683 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
686 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
689 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
695 RSA_PSS_PARAMS_free(pss);
697 X509_ALGOR_free(maskHash);
701 static int rsa_cms_verify(CMS_SignerInfo *si)
705 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
706 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
707 nid = OBJ_obj2nid(alg->algorithm);
708 if (nid == NID_rsaEncryption)
710 if (nid == NID_rsassaPss)
711 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
712 /* Workaround for some implementation that use a signature OID */
713 if (OBJ_find_sigid_algs(nid, NULL, &nid2))
715 if (nid2 == NID_rsaEncryption)
721 /* Customised RSA item verification routine. This is called
722 * when a signature is encountered requiring special handling. We
723 * currently only handle PSS.
727 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
728 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
731 /* Sanity check: make sure it is PSS */
732 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss)
734 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
737 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey))
743 static int rsa_cms_sign(CMS_SignerInfo *si)
745 int pad_mode = RSA_PKCS1_PADDING;
747 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
748 ASN1_STRING *os = NULL;
749 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
752 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
755 if (pad_mode == RSA_PKCS1_PADDING)
757 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
761 /* We don't support it */
762 if (pad_mode != RSA_PKCS1_PSS_PADDING)
764 os = rsa_ctx_to_pss(pkctx);
767 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
771 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
772 X509_ALGOR *alg1, X509_ALGOR *alg2,
773 ASN1_BIT_STRING *sig)
776 EVP_PKEY_CTX *pkctx = ctx->pctx;
777 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
779 if (pad_mode == RSA_PKCS1_PADDING)
781 if (pad_mode == RSA_PKCS1_PSS_PADDING)
783 ASN1_STRING *os1 = NULL;
784 os1 = rsa_ctx_to_pss(pkctx);
787 /* Duplicate parameters if we have to */
790 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
793 ASN1_STRING_free(os1);
796 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
797 V_ASN1_SEQUENCE, os2);
799 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
800 V_ASN1_SEQUENCE, os1);
806 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
807 X509_ALGOR **pmaskHash)
809 const unsigned char *p;
811 RSA_OAEP_PARAMS *pss;
815 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
817 p = alg->parameter->value.sequence->data;
818 plen = alg->parameter->value.sequence->length;
819 pss = d2i_RSA_OAEP_PARAMS(NULL, &p, plen);
824 *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
829 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
835 unsigned char *label = NULL;
837 const EVP_MD *mgf1md = NULL, *md = NULL;
838 RSA_OAEP_PARAMS *oaep;
839 X509_ALGOR *maskHash;
840 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
843 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
845 nid = OBJ_obj2nid(cmsalg->algorithm);
846 if (nid == NID_rsaEncryption)
848 if (nid != NID_rsaesOaep)
850 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
853 /* Decode OAEP parameters */
854 oaep = rsa_oaep_decode(cmsalg, &maskHash);
858 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
862 mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
865 md = rsa_algor_to_md(oaep->hashFunc);
869 if (oaep->pSourceFunc)
871 X509_ALGOR *plab = oaep->pSourceFunc;
872 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified)
874 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
877 if (plab->parameter->type != V_ASN1_OCTET_STRING)
879 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
883 label = plab->parameter->value.octet_string->data;
884 /* Stop label being freed when OAEP parameters are freed */
885 plab->parameter->value.octet_string->data = NULL;
886 labellen = plab->parameter->value.octet_string->length;
889 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
891 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
893 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
895 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
901 RSA_OAEP_PARAMS_free(oaep);
903 X509_ALGOR_free(maskHash);
907 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
909 const EVP_MD *md, *mgf1md;
910 RSA_OAEP_PARAMS *oaep = NULL;
911 ASN1_STRING *os = NULL;
913 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
914 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
915 unsigned char *label;
916 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
919 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
922 if (pad_mode == RSA_PKCS1_PADDING)
924 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
929 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
931 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
933 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
935 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
938 oaep = RSA_OAEP_PARAMS_new();
941 if (!rsa_md_to_algor(&oaep->hashFunc, md))
943 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
947 ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
948 oaep->pSourceFunc = X509_ALGOR_new();
949 if (!oaep->pSourceFunc)
953 if (!ASN1_OCTET_STRING_set(los, label, labellen))
955 ASN1_OCTET_STRING_free(los);
958 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
959 V_ASN1_OCTET_STRING, los);
961 /* create string with pss parameter encoding. */
962 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
964 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
969 RSA_OAEP_PARAMS_free(oaep);
971 ASN1_STRING_free(os);
975 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] =
980 ASN1_PKEY_SIGPARAM_NULL,
983 "OpenSSL RSA method",
1002 old_rsa_priv_decode,
1003 old_rsa_priv_encode,