1 /* crypto/rsa/rsa_pmeth.c */
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/asn1t.h>
63 #include <openssl/x509.h>
64 #include <openssl/rsa.h>
65 #include <openssl/bn.h>
66 #include <openssl/evp.h>
67 #include <openssl/x509v3.h>
68 #ifndef OPENSSL_NO_CMS
69 # include <openssl/cms.h>
72 # include <openssl/fips.h>
77 /* 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;
134 dctx->pub_exp = BN_dup(sctx->pub_exp);
138 dctx->pad_mode = sctx->pad_mode;
140 dctx->mgf1md = sctx->mgf1md;
141 if (sctx->oaep_label) {
142 if (dctx->oaep_label)
143 OPENSSL_free(dctx->oaep_label);
144 dctx->oaep_label = BUF_memdup(sctx->oaep_label, sctx->oaep_labellen);
145 if (!dctx->oaep_label)
147 dctx->oaep_labellen = sctx->oaep_labellen;
152 static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
156 ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
162 static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
164 RSA_PKEY_CTX *rctx = ctx->data;
167 BN_free(rctx->pub_exp);
169 OPENSSL_free(rctx->tbuf);
170 if (rctx->oaep_label)
171 OPENSSL_free(rctx->oaep_label);
178 * FIP checker. Return value indicates status of context parameters: 1 :
179 * redirect to FIPS. 0 : don't redirect to FIPS. -1 : illegal operation in
183 static int pkey_fips_check_rsa(const RSA *rsa, const EVP_MD **pmd,
184 const EVP_MD **pmgf1md)
190 if (rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)
192 if (!(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) && rv)
195 *pmd = FIPS_get_digestbynid(EVP_MD_type(*pmd));
196 if (*pmd == NULL || !((*pmd)->flags & EVP_MD_FLAG_FIPS))
199 if (*pmgf1md != NULL) {
200 *pmgf1md = FIPS_get_digestbynid(EVP_MD_type(*pmgf1md));
201 if (*pmgf1md == NULL || !((*pmgf1md)->flags & EVP_MD_FLAG_FIPS))
208 static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
209 size_t *siglen, const unsigned char *tbs,
213 RSA_PKEY_CTX *rctx = ctx->data;
214 RSA *rsa = ctx->pkey->pkey.rsa;
215 const EVP_MD *md = rctx->md;
216 const EVP_MD *mgf1md = rctx->mgf1md;
219 ret = pkey_fips_check_rsa(rsa, &md, &mgf1md);
221 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
227 if (tbslen != (size_t)EVP_MD_size(md)) {
228 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_INVALID_DIGEST_LENGTH);
234 ret = FIPS_rsa_sign_digest(rsa, tbs, tbslen, md, rctx->pad_mode,
235 rctx->saltlen, mgf1md, sig, &slen);
244 if (EVP_MD_type(md) == NID_mdc2) {
246 if (rctx->pad_mode != RSA_PKCS1_PADDING)
248 ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2, tbs, tbslen, sig, &sltmp,
254 } else if (rctx->pad_mode == RSA_X931_PADDING) {
255 if ((size_t)EVP_PKEY_size(ctx->pkey) < tbslen + 1) {
256 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_KEY_SIZE_TOO_SMALL);
259 if (!setup_tbuf(rctx, ctx)) {
260 RSAerr(RSA_F_PKEY_RSA_SIGN, ERR_R_MALLOC_FAILURE);
263 memcpy(rctx->tbuf, tbs, tbslen);
264 rctx->tbuf[tbslen] = RSA_X931_hash_id(EVP_MD_type(md));
265 ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
266 sig, rsa, RSA_X931_PADDING);
267 } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
269 ret = RSA_sign(EVP_MD_type(md), tbs, tbslen, sig, &sltmp, rsa);
273 } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
274 if (!setup_tbuf(rctx, ctx))
276 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa, rctx->tbuf, tbs,
277 md, mgf1md, rctx->saltlen))
279 ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
280 sig, rsa, RSA_NO_PADDING);
284 ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
292 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
293 unsigned char *rout, size_t *routlen,
294 const unsigned char *sig, size_t siglen)
297 RSA_PKEY_CTX *rctx = ctx->data;
300 if (rctx->pad_mode == RSA_X931_PADDING) {
301 if (!setup_tbuf(rctx, ctx))
303 ret = RSA_public_decrypt(siglen, sig,
304 rctx->tbuf, ctx->pkey->pkey.rsa,
309 if (rctx->tbuf[ret] != RSA_X931_hash_id(EVP_MD_type(rctx->md))) {
310 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
311 RSA_R_ALGORITHM_MISMATCH);
314 if (ret != EVP_MD_size(rctx->md)) {
315 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
316 RSA_R_INVALID_DIGEST_LENGTH);
320 memcpy(rout, rctx->tbuf, ret);
321 } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
323 ret = int_rsa_verify(EVP_MD_type(rctx->md),
324 NULL, 0, rout, &sltmp,
325 sig, siglen, ctx->pkey->pkey.rsa);
332 ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
340 static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
341 const unsigned char *sig, size_t siglen,
342 const unsigned char *tbs, size_t tbslen)
344 RSA_PKEY_CTX *rctx = ctx->data;
345 RSA *rsa = ctx->pkey->pkey.rsa;
346 const EVP_MD *md = rctx->md;
347 const EVP_MD *mgf1md = rctx->mgf1md;
351 int rv = pkey_fips_check_rsa(rsa, &md, &mgf1md);
354 RSAerr(RSA_F_PKEY_RSA_VERIFY,
355 RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
362 return FIPS_rsa_verify_digest(rsa, tbs, tbslen, md, rctx->pad_mode,
363 rctx->saltlen, mgf1md, sig, siglen);
367 if (rctx->pad_mode == RSA_PKCS1_PADDING)
368 return RSA_verify(EVP_MD_type(md), tbs, tbslen,
370 if (tbslen != (size_t)EVP_MD_size(md)) {
371 RSAerr(RSA_F_PKEY_RSA_VERIFY, RSA_R_INVALID_DIGEST_LENGTH);
374 if (rctx->pad_mode == RSA_X931_PADDING) {
375 if (pkey_rsa_verifyrecover(ctx, NULL, &rslen, sig, siglen) <= 0)
377 } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
379 if (!setup_tbuf(rctx, ctx))
381 ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
382 rsa, RSA_NO_PADDING);
385 ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs, md, mgf1md,
386 rctx->tbuf, rctx->saltlen);
393 if (!setup_tbuf(rctx, ctx))
395 rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
396 rsa, rctx->pad_mode);
401 if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
408 static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
409 unsigned char *out, size_t *outlen,
410 const unsigned char *in, size_t inlen)
413 RSA_PKEY_CTX *rctx = ctx->data;
414 if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
415 int klen = RSA_size(ctx->pkey->pkey.rsa);
416 if (!setup_tbuf(rctx, ctx))
418 if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx->tbuf, klen,
422 rctx->md, rctx->mgf1md))
424 ret = RSA_public_encrypt(klen, rctx->tbuf, out,
425 ctx->pkey->pkey.rsa, RSA_NO_PADDING);
427 ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
435 static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
436 unsigned char *out, size_t *outlen,
437 const unsigned char *in, size_t inlen)
440 RSA_PKEY_CTX *rctx = ctx->data;
441 if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
442 if (!setup_tbuf(rctx, ctx))
444 ret = RSA_private_decrypt(inlen, in, rctx->tbuf,
445 ctx->pkey->pkey.rsa, RSA_NO_PADDING);
448 ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, ret, rctx->tbuf,
452 rctx->md, rctx->mgf1md);
454 ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
462 static int check_padding_md(const EVP_MD *md, int padding)
467 if (padding == RSA_NO_PADDING) {
468 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
472 if (padding == RSA_X931_PADDING) {
473 if (RSA_X931_hash_id(EVP_MD_type(md)) == -1) {
474 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_X931_DIGEST);
483 static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
485 RSA_PKEY_CTX *rctx = ctx->data;
487 case EVP_PKEY_CTRL_RSA_PADDING:
488 if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING)) {
489 if (!check_padding_md(rctx->md, p1))
491 if (p1 == RSA_PKCS1_PSS_PADDING) {
492 if (!(ctx->operation &
493 (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
496 rctx->md = EVP_sha1();
498 if (p1 == RSA_PKCS1_OAEP_PADDING) {
499 if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
502 rctx->md = EVP_sha1();
508 RSAerr(RSA_F_PKEY_RSA_CTRL,
509 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
512 case EVP_PKEY_CTRL_GET_RSA_PADDING:
513 *(int *)p2 = rctx->pad_mode;
516 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
517 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
518 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING) {
519 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
522 if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
523 *(int *)p2 = rctx->saltlen;
531 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
533 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
539 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
540 if (p2 == NULL || !BN_is_odd((BIGNUM *)p2) || BN_is_one((BIGNUM *)p2)) {
541 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_BAD_E_VALUE);
544 BN_free(rctx->pub_exp);
548 case EVP_PKEY_CTRL_RSA_OAEP_MD:
549 case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
550 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
551 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
554 if (type == EVP_PKEY_CTRL_GET_RSA_OAEP_MD)
555 *(const EVP_MD **)p2 = rctx->md;
560 case EVP_PKEY_CTRL_MD:
561 if (!check_padding_md(p2, rctx->pad_mode))
566 case EVP_PKEY_CTRL_GET_MD:
567 *(const EVP_MD **)p2 = rctx->md;
570 case EVP_PKEY_CTRL_RSA_MGF1_MD:
571 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
572 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING
573 && rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
574 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_MGF1_MD);
577 if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD) {
579 *(const EVP_MD **)p2 = rctx->mgf1md;
581 *(const EVP_MD **)p2 = rctx->md;
586 case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
587 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
588 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
591 if (rctx->oaep_label)
592 OPENSSL_free(rctx->oaep_label);
594 rctx->oaep_label = p2;
595 rctx->oaep_labellen = p1;
597 rctx->oaep_label = NULL;
598 rctx->oaep_labellen = 0;
602 case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
603 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
604 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
607 *(unsigned char **)p2 = rctx->oaep_label;
608 return rctx->oaep_labellen;
610 case EVP_PKEY_CTRL_DIGESTINIT:
611 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
612 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
613 case EVP_PKEY_CTRL_PKCS7_SIGN:
615 #ifndef OPENSSL_NO_CMS
616 case EVP_PKEY_CTRL_CMS_DECRYPT:
617 case EVP_PKEY_CTRL_CMS_ENCRYPT:
618 case EVP_PKEY_CTRL_CMS_SIGN:
621 case EVP_PKEY_CTRL_PEER_KEY:
622 RSAerr(RSA_F_PKEY_RSA_CTRL,
623 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
632 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
633 const char *type, const char *value)
636 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
639 if (!strcmp(type, "rsa_padding_mode")) {
641 if (!strcmp(value, "pkcs1"))
642 pm = RSA_PKCS1_PADDING;
643 else if (!strcmp(value, "sslv23"))
644 pm = RSA_SSLV23_PADDING;
645 else if (!strcmp(value, "none"))
647 else if (!strcmp(value, "oeap"))
648 pm = RSA_PKCS1_OAEP_PADDING;
649 else if (!strcmp(value, "oaep"))
650 pm = RSA_PKCS1_OAEP_PADDING;
651 else if (!strcmp(value, "x931"))
652 pm = RSA_X931_PADDING;
653 else if (!strcmp(value, "pss"))
654 pm = RSA_PKCS1_PSS_PADDING;
656 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_UNKNOWN_PADDING_TYPE);
659 return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
662 if (!strcmp(type, "rsa_pss_saltlen")) {
664 saltlen = atoi(value);
665 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
668 if (!strcmp(type, "rsa_keygen_bits")) {
671 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
674 if (!strcmp(type, "rsa_keygen_pubexp")) {
676 BIGNUM *pubexp = NULL;
677 if (!BN_asc2bn(&pubexp, value))
679 ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
685 if (!strcmp(type, "rsa_mgf1_md")) {
687 if (!(md = EVP_get_digestbyname(value))) {
688 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
691 return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md);
694 if (!strcmp(type, "rsa_oaep_md")) {
696 if (!(md = EVP_get_digestbyname(value))) {
697 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
700 return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md);
702 if (!strcmp(type, "rsa_oaep_label")) {
706 lab = string_to_hex(value, &lablen);
709 ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
718 static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
721 RSA_PKEY_CTX *rctx = ctx->data;
724 if (!rctx->pub_exp) {
725 rctx->pub_exp = BN_new();
726 if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
732 if (ctx->pkey_gencb) {
734 evp_pkey_set_cb_translate(pcb, ctx);
737 ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
739 EVP_PKEY_assign_RSA(pkey, rsa);
745 const EVP_PKEY_METHOD rsa_pkey_meth = {
747 EVP_PKEY_FLAG_AUTOARGLEN,
764 pkey_rsa_verifyrecover,