1 /* crypto/rsa/rsa_pmeth.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 #include <openssl/evp.h>
66 #include <openssl/x509v3.h>
67 #ifndef OPENSSL_NO_CMS
68 #include <openssl/cms.h>
71 #include <openssl/fips.h>
76 /* RSA pkey context structure */
80 /* Key gen parameters */
83 /* Keygen callback info */
85 /* RSA padding mode */
89 /* message digest for MGF1 */
96 unsigned char *oaep_label;
100 static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
103 rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
107 rctx->pub_exp = NULL;
108 rctx->pad_mode = RSA_PKCS1_PADDING;
115 rctx->oaep_label = NULL;
116 rctx->oaep_labellen = 0;
119 ctx->keygen_info = rctx->gentmp;
120 ctx->keygen_info_count = 2;
125 static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
127 RSA_PKEY_CTX *dctx, *sctx;
128 if (!pkey_rsa_init(dst))
132 dctx->nbits = sctx->nbits;
135 dctx->pub_exp = BN_dup(sctx->pub_exp);
139 dctx->pad_mode = sctx->pad_mode;
141 dctx->mgf1md = sctx->mgf1md;
142 if (sctx->oaep_label)
144 if (dctx->oaep_label)
145 OPENSSL_free(dctx->oaep_label);
146 dctx->oaep_label = BUF_memdup(sctx->oaep_label,
147 sctx->oaep_labellen);
148 if (!dctx->oaep_label)
150 dctx->oaep_labellen = sctx->oaep_labellen;
155 static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
159 ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
165 static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
167 RSA_PKEY_CTX *rctx = ctx->data;
171 BN_free(rctx->pub_exp);
173 OPENSSL_free(rctx->tbuf);
174 if (rctx->oaep_label)
175 OPENSSL_free(rctx->oaep_label);
180 /* FIP checker. Return value indicates status of context parameters:
181 * 1 : redirect to FIPS.
182 * 0 : don't redirect to FIPS.
183 * -1 : illegal operation in FIPS mode.
186 static int pkey_fips_check_ctx(EVP_PKEY_CTX *ctx)
188 RSA_PKEY_CTX *rctx = ctx->data;
189 RSA *rsa = ctx->pkey->pkey.rsa;
193 if (rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)
195 if (!(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) && rv)
200 fmd = FIPS_get_digestbynid(EVP_MD_type(rctx->md));
201 if (!fmd || !(fmd->flags & EVP_MD_FLAG_FIPS))
204 if (rctx->mgf1md && !(rctx->mgf1md->flags & EVP_MD_FLAG_FIPS))
207 fmd = FIPS_get_digestbynid(EVP_MD_type(rctx->mgf1md));
208 if (!fmd || !(fmd->flags & EVP_MD_FLAG_FIPS))
215 static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
216 const unsigned char *tbs, size_t tbslen)
219 RSA_PKEY_CTX *rctx = ctx->data;
220 RSA *rsa = ctx->pkey->pkey.rsa;
223 ret = pkey_fips_check_ctx(ctx);
226 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
233 if (tbslen != (size_t)EVP_MD_size(rctx->md))
235 RSAerr(RSA_F_PKEY_RSA_SIGN,
236 RSA_R_INVALID_DIGEST_LENGTH);
243 ret = FIPS_rsa_sign_digest(rsa, tbs, tbslen, rctx->md,
256 if (EVP_MD_type(rctx->md) == NID_mdc2)
259 if (rctx->pad_mode != RSA_PKCS1_PADDING)
261 ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2,
262 tbs, tbslen, sig, &sltmp, rsa);
268 else if (rctx->pad_mode == RSA_X931_PADDING)
270 if (!setup_tbuf(rctx, ctx))
272 memcpy(rctx->tbuf, tbs, tbslen);
274 RSA_X931_hash_id(EVP_MD_type(rctx->md));
275 ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
276 sig, rsa, RSA_X931_PADDING);
278 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
281 ret = RSA_sign(EVP_MD_type(rctx->md),
282 tbs, tbslen, sig, &sltmp, rsa);
287 else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
289 if (!setup_tbuf(rctx, ctx))
291 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa,
293 rctx->md, rctx->mgf1md,
296 ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
297 sig, rsa, RSA_NO_PADDING);
303 ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
312 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
313 unsigned char *rout, size_t *routlen,
314 const unsigned char *sig, size_t siglen)
317 RSA_PKEY_CTX *rctx = ctx->data;
321 if (rctx->pad_mode == RSA_X931_PADDING)
323 if (!setup_tbuf(rctx, ctx))
325 ret = RSA_public_decrypt(siglen, sig,
326 rctx->tbuf, ctx->pkey->pkey.rsa,
331 if (rctx->tbuf[ret] !=
332 RSA_X931_hash_id(EVP_MD_type(rctx->md)))
334 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
335 RSA_R_ALGORITHM_MISMATCH);
338 if (ret != EVP_MD_size(rctx->md))
340 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
341 RSA_R_INVALID_DIGEST_LENGTH);
345 memcpy(rout, rctx->tbuf, ret);
347 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
350 ret = int_rsa_verify(EVP_MD_type(rctx->md),
351 NULL, 0, rout, &sltmp,
352 sig, siglen, ctx->pkey->pkey.rsa);
361 ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
369 static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
370 const unsigned char *sig, size_t siglen,
371 const unsigned char *tbs, size_t tbslen)
373 RSA_PKEY_CTX *rctx = ctx->data;
374 RSA *rsa = ctx->pkey->pkey.rsa;
378 rv = pkey_fips_check_ctx(ctx);
381 RSAerr(RSA_F_PKEY_RSA_VERIFY, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
390 return FIPS_rsa_verify_digest(rsa,
400 if (rctx->pad_mode == RSA_PKCS1_PADDING)
401 return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
403 if (rctx->pad_mode == RSA_X931_PADDING)
405 if (pkey_rsa_verifyrecover(ctx, NULL, &rslen,
409 else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
412 if (!setup_tbuf(rctx, ctx))
414 ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
415 rsa, RSA_NO_PADDING);
418 ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs,
419 rctx->md, rctx->mgf1md,
420 rctx->tbuf, rctx->saltlen);
430 if (!setup_tbuf(rctx, ctx))
432 rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
433 rsa, rctx->pad_mode);
438 if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
445 static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
446 unsigned char *out, size_t *outlen,
447 const unsigned char *in, size_t inlen)
450 RSA_PKEY_CTX *rctx = ctx->data;
451 if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING)
453 int klen = RSA_size(ctx->pkey->pkey.rsa);
454 if (!setup_tbuf(rctx, ctx))
456 if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx->tbuf, klen,
460 rctx->md, rctx->mgf1md))
462 ret = RSA_public_encrypt(klen, rctx->tbuf, out,
467 ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
475 static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
476 unsigned char *out, size_t *outlen,
477 const unsigned char *in, size_t inlen)
480 RSA_PKEY_CTX *rctx = ctx->data;
481 if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING)
484 if (!setup_tbuf(rctx, ctx))
486 ret = RSA_private_decrypt(inlen, in, rctx->tbuf,
491 for (i = 0; i < ret; i++)
496 ret = RSA_padding_check_PKCS1_OAEP_mgf1(out,ret,rctx->tbuf + i,
500 rctx->md, rctx->mgf1md);
503 ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
511 static int check_padding_md(const EVP_MD *md, int padding)
516 if (padding == RSA_NO_PADDING)
518 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
522 if (padding == RSA_X931_PADDING)
524 if (RSA_X931_hash_id(EVP_MD_type(md)) == -1)
526 RSAerr(RSA_F_CHECK_PADDING_MD,
527 RSA_R_INVALID_X931_DIGEST);
537 static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
539 RSA_PKEY_CTX *rctx = ctx->data;
542 case EVP_PKEY_CTRL_RSA_PADDING:
543 if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING))
545 if (!check_padding_md(rctx->md, p1))
547 if (p1 == RSA_PKCS1_PSS_PADDING)
549 if (!(ctx->operation &
550 (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
553 rctx->md = EVP_sha1();
555 if (p1 == RSA_PKCS1_OAEP_PADDING)
557 if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
560 rctx->md = EVP_sha1();
566 RSAerr(RSA_F_PKEY_RSA_CTRL,
567 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
570 case EVP_PKEY_CTRL_GET_RSA_PADDING:
571 *(int *)p2 = rctx->pad_mode;
574 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
575 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
576 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
578 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
581 if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
582 *(int *)p2 = rctx->saltlen;
591 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
594 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
600 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
603 BN_free(rctx->pub_exp);
607 case EVP_PKEY_CTRL_RSA_OAEP_MD:
608 case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
609 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING)
611 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
614 if (type == EVP_PKEY_CTRL_GET_RSA_OAEP_MD)
615 *(const EVP_MD **)p2 = rctx->md;
620 case EVP_PKEY_CTRL_MD:
621 if (!check_padding_md(p2, rctx->pad_mode))
626 case EVP_PKEY_CTRL_GET_MD:
627 *(const EVP_MD **)p2 = rctx->md;
630 case EVP_PKEY_CTRL_RSA_MGF1_MD:
631 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
632 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING
633 && rctx->pad_mode != RSA_PKCS1_OAEP_PADDING)
635 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_MGF1_MD);
638 if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD)
641 *(const EVP_MD **)p2 = rctx->mgf1md;
643 *(const EVP_MD **)p2 = rctx->md;
649 case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
650 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING)
652 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
655 if (rctx->oaep_label)
656 OPENSSL_free(rctx->oaep_label);
659 rctx->oaep_label = p2;
660 rctx->oaep_labellen = p1;
664 rctx->oaep_label = NULL;
665 rctx->oaep_labellen = 0;
669 case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
670 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING)
672 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
675 *(unsigned char **)p2 = rctx->oaep_label;
676 return rctx->oaep_labellen;
678 case EVP_PKEY_CTRL_DIGESTINIT:
679 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
680 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
681 case EVP_PKEY_CTRL_PKCS7_SIGN:
683 #ifndef OPENSSL_NO_CMS
684 case EVP_PKEY_CTRL_CMS_DECRYPT:
686 X509_ALGOR *alg = NULL;
687 ASN1_OBJECT *encalg = NULL;
689 CMS_RecipientInfo_ktri_get0_algs(p2, NULL, NULL, &alg);
691 X509_ALGOR_get0(&encalg, NULL, NULL, alg);
692 if (encalg && OBJ_obj2nid(encalg) == NID_rsaesOaep)
693 rctx->pad_mode = RSA_PKCS1_OAEP_PADDING;
695 case EVP_PKEY_CTRL_CMS_ENCRYPT:
696 case EVP_PKEY_CTRL_CMS_SIGN:
699 case EVP_PKEY_CTRL_PEER_KEY:
700 RSAerr(RSA_F_PKEY_RSA_CTRL,
701 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
710 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
711 const char *type, const char *value)
715 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
718 if (!strcmp(type, "rsa_padding_mode"))
721 if (!strcmp(value, "pkcs1"))
722 pm = RSA_PKCS1_PADDING;
723 else if (!strcmp(value, "sslv23"))
724 pm = RSA_SSLV23_PADDING;
725 else if (!strcmp(value, "none"))
727 else if (!strcmp(value, "oeap"))
728 pm = RSA_PKCS1_OAEP_PADDING;
729 else if (!strcmp(value, "oaep"))
730 pm = RSA_PKCS1_OAEP_PADDING;
731 else if (!strcmp(value, "x931"))
732 pm = RSA_X931_PADDING;
733 else if (!strcmp(value, "pss"))
734 pm = RSA_PKCS1_PSS_PADDING;
737 RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
738 RSA_R_UNKNOWN_PADDING_TYPE);
741 return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
744 if (!strcmp(type, "rsa_pss_saltlen"))
747 saltlen = atoi(value);
748 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
751 if (!strcmp(type, "rsa_keygen_bits"))
755 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
758 if (!strcmp(type, "rsa_keygen_pubexp"))
761 BIGNUM *pubexp = NULL;
762 if (!BN_asc2bn(&pubexp, value))
764 ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
770 if (!strcmp(type, "rsa_mgf1_md"))
773 if (!(md = EVP_get_digestbyname(value)))
775 RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
776 RSA_R_INVALID_DIGEST);
779 return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md);
782 if (!strcmp(type, "rsa_oaep_md"))
785 if (!(md = EVP_get_digestbyname(value)))
787 RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
788 RSA_R_INVALID_DIGEST);
791 return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md);
793 if (!strcmp(type, "rsa_oaep_label"))
798 lab = string_to_hex(value, &lablen);
801 ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
810 static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
813 RSA_PKEY_CTX *rctx = ctx->data;
818 rctx->pub_exp = BN_new();
819 if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
828 evp_pkey_set_cb_translate(pcb, ctx);
832 ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
834 EVP_PKEY_assign_RSA(pkey, rsa);
840 const EVP_PKEY_METHOD rsa_pkey_meth =
843 EVP_PKEY_FLAG_AUTOARGLEN,
860 pkey_rsa_verifyrecover,