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>
74 /* RSA pkey context structure */
77 /* Key gen parameters */
80 /* Keygen callback info */
82 /* RSA padding mode */
86 /* message digest for MGF1 */
93 unsigned char *oaep_label;
97 static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
100 rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
104 rctx->pub_exp = NULL;
105 rctx->pad_mode = RSA_PKCS1_PADDING;
112 rctx->oaep_label = NULL;
113 rctx->oaep_labellen = 0;
116 ctx->keygen_info = rctx->gentmp;
117 ctx->keygen_info_count = 2;
122 static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
124 RSA_PKEY_CTX *dctx, *sctx;
125 if (!pkey_rsa_init(dst))
129 dctx->nbits = sctx->nbits;
131 dctx->pub_exp = BN_dup(sctx->pub_exp);
135 dctx->pad_mode = sctx->pad_mode;
137 dctx->mgf1md = sctx->mgf1md;
138 if (sctx->oaep_label) {
139 if (dctx->oaep_label)
140 OPENSSL_free(dctx->oaep_label);
141 dctx->oaep_label = BUF_memdup(sctx->oaep_label, sctx->oaep_labellen);
142 if (!dctx->oaep_label)
144 dctx->oaep_labellen = sctx->oaep_labellen;
149 static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
153 ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
159 static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
161 RSA_PKEY_CTX *rctx = ctx->data;
164 BN_free(rctx->pub_exp);
166 OPENSSL_free(rctx->tbuf);
167 if (rctx->oaep_label)
168 OPENSSL_free(rctx->oaep_label);
173 static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
174 size_t *siglen, const unsigned char *tbs,
178 RSA_PKEY_CTX *rctx = ctx->data;
179 RSA *rsa = ctx->pkey->pkey.rsa;
182 if (tbslen != (size_t)EVP_MD_size(rctx->md)) {
183 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_INVALID_DIGEST_LENGTH);
187 if (EVP_MD_type(rctx->md) == NID_mdc2) {
189 if (rctx->pad_mode != RSA_PKCS1_PADDING)
191 ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2,
192 tbs, tbslen, sig, &sltmp, rsa);
197 } else if (rctx->pad_mode == RSA_X931_PADDING) {
198 if (!setup_tbuf(rctx, ctx))
200 memcpy(rctx->tbuf, tbs, tbslen);
201 rctx->tbuf[tbslen] = RSA_X931_hash_id(EVP_MD_type(rctx->md));
202 ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
203 sig, rsa, RSA_X931_PADDING);
204 } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
206 ret = RSA_sign(EVP_MD_type(rctx->md),
207 tbs, tbslen, sig, &sltmp, rsa);
211 } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
212 if (!setup_tbuf(rctx, ctx))
214 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa,
216 rctx->md, rctx->mgf1md,
219 ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
220 sig, rsa, RSA_NO_PADDING);
224 ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
232 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
233 unsigned char *rout, size_t *routlen,
234 const unsigned char *sig, size_t siglen)
237 RSA_PKEY_CTX *rctx = ctx->data;
240 if (rctx->pad_mode == RSA_X931_PADDING) {
241 if (!setup_tbuf(rctx, ctx))
243 ret = RSA_public_decrypt(siglen, sig,
244 rctx->tbuf, ctx->pkey->pkey.rsa,
249 if (rctx->tbuf[ret] != RSA_X931_hash_id(EVP_MD_type(rctx->md))) {
250 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
251 RSA_R_ALGORITHM_MISMATCH);
254 if (ret != EVP_MD_size(rctx->md)) {
255 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
256 RSA_R_INVALID_DIGEST_LENGTH);
260 memcpy(rout, rctx->tbuf, ret);
261 } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
263 ret = int_rsa_verify(EVP_MD_type(rctx->md),
264 NULL, 0, rout, &sltmp,
265 sig, siglen, ctx->pkey->pkey.rsa);
272 ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
280 static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
281 const unsigned char *sig, size_t siglen,
282 const unsigned char *tbs, size_t tbslen)
284 RSA_PKEY_CTX *rctx = ctx->data;
285 RSA *rsa = ctx->pkey->pkey.rsa;
288 if (rctx->pad_mode == RSA_PKCS1_PADDING)
289 return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
291 if (rctx->pad_mode == RSA_X931_PADDING) {
292 if (pkey_rsa_verifyrecover(ctx, NULL, &rslen, sig, siglen) <= 0)
294 } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
296 if (!setup_tbuf(rctx, ctx))
298 ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
299 rsa, RSA_NO_PADDING);
302 ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs,
303 rctx->md, rctx->mgf1md,
304 rctx->tbuf, rctx->saltlen);
311 if (!setup_tbuf(rctx, ctx))
313 rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
314 rsa, rctx->pad_mode);
319 if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
326 static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
327 unsigned char *out, size_t *outlen,
328 const unsigned char *in, size_t inlen)
331 RSA_PKEY_CTX *rctx = ctx->data;
332 if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
333 int klen = RSA_size(ctx->pkey->pkey.rsa);
334 if (!setup_tbuf(rctx, ctx))
336 if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx->tbuf, klen,
340 rctx->md, rctx->mgf1md))
342 ret = RSA_public_encrypt(klen, rctx->tbuf, out,
343 ctx->pkey->pkey.rsa, RSA_NO_PADDING);
345 ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
353 static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
354 unsigned char *out, size_t *outlen,
355 const unsigned char *in, size_t inlen)
358 RSA_PKEY_CTX *rctx = ctx->data;
359 if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
361 if (!setup_tbuf(rctx, ctx))
363 ret = RSA_private_decrypt(inlen, in, rctx->tbuf,
364 ctx->pkey->pkey.rsa, RSA_NO_PADDING);
367 for (i = 0; i < ret; i++) {
371 ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, ret, rctx->tbuf + i,
375 rctx->md, rctx->mgf1md);
377 ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
385 static int check_padding_md(const EVP_MD *md, int padding)
390 if (padding == RSA_NO_PADDING) {
391 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
395 if (padding == RSA_X931_PADDING) {
396 if (RSA_X931_hash_id(EVP_MD_type(md)) == -1) {
397 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_X931_DIGEST);
406 static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
408 RSA_PKEY_CTX *rctx = ctx->data;
410 case EVP_PKEY_CTRL_RSA_PADDING:
411 if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING)) {
412 if (!check_padding_md(rctx->md, p1))
414 if (p1 == RSA_PKCS1_PSS_PADDING) {
415 if (!(ctx->operation &
416 (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
419 rctx->md = EVP_sha1();
421 if (p1 == RSA_PKCS1_OAEP_PADDING) {
422 if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
425 rctx->md = EVP_sha1();
431 RSAerr(RSA_F_PKEY_RSA_CTRL,
432 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
435 case EVP_PKEY_CTRL_GET_RSA_PADDING:
436 *(int *)p2 = rctx->pad_mode;
439 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
440 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
441 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING) {
442 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
445 if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
446 *(int *)p2 = rctx->saltlen;
454 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
456 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_KEY_SIZE_TOO_SMALL);
462 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
465 BN_free(rctx->pub_exp);
469 case EVP_PKEY_CTRL_RSA_OAEP_MD:
470 case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
471 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
472 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
475 if (type == EVP_PKEY_CTRL_GET_RSA_OAEP_MD)
476 *(const EVP_MD **)p2 = rctx->md;
481 case EVP_PKEY_CTRL_MD:
482 if (!check_padding_md(p2, rctx->pad_mode))
487 case EVP_PKEY_CTRL_GET_MD:
488 *(const EVP_MD **)p2 = rctx->md;
491 case EVP_PKEY_CTRL_RSA_MGF1_MD:
492 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
493 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING
494 && rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
495 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_MGF1_MD);
498 if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD) {
500 *(const EVP_MD **)p2 = rctx->mgf1md;
502 *(const EVP_MD **)p2 = rctx->md;
507 case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
508 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
509 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
512 if (rctx->oaep_label)
513 OPENSSL_free(rctx->oaep_label);
515 rctx->oaep_label = p2;
516 rctx->oaep_labellen = p1;
518 rctx->oaep_label = NULL;
519 rctx->oaep_labellen = 0;
523 case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
524 if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
525 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
528 *(unsigned char **)p2 = rctx->oaep_label;
529 return rctx->oaep_labellen;
531 case EVP_PKEY_CTRL_DIGESTINIT:
532 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
533 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
534 case EVP_PKEY_CTRL_PKCS7_SIGN:
536 #ifndef OPENSSL_NO_CMS
537 case EVP_PKEY_CTRL_CMS_DECRYPT:
538 case EVP_PKEY_CTRL_CMS_ENCRYPT:
539 case EVP_PKEY_CTRL_CMS_SIGN:
542 case EVP_PKEY_CTRL_PEER_KEY:
543 RSAerr(RSA_F_PKEY_RSA_CTRL,
544 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
553 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
554 const char *type, const char *value)
557 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
560 if (!strcmp(type, "rsa_padding_mode")) {
562 if (!strcmp(value, "pkcs1"))
563 pm = RSA_PKCS1_PADDING;
564 else if (!strcmp(value, "sslv23"))
565 pm = RSA_SSLV23_PADDING;
566 else if (!strcmp(value, "none"))
568 else if (!strcmp(value, "oeap"))
569 pm = RSA_PKCS1_OAEP_PADDING;
570 else if (!strcmp(value, "oaep"))
571 pm = RSA_PKCS1_OAEP_PADDING;
572 else if (!strcmp(value, "x931"))
573 pm = RSA_X931_PADDING;
574 else if (!strcmp(value, "pss"))
575 pm = RSA_PKCS1_PSS_PADDING;
577 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_UNKNOWN_PADDING_TYPE);
580 return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
583 if (!strcmp(type, "rsa_pss_saltlen")) {
585 saltlen = atoi(value);
586 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
589 if (!strcmp(type, "rsa_keygen_bits")) {
592 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
595 if (!strcmp(type, "rsa_keygen_pubexp")) {
597 BIGNUM *pubexp = NULL;
598 if (!BN_asc2bn(&pubexp, value))
600 ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
606 if (!strcmp(type, "rsa_mgf1_md")) {
608 if (!(md = EVP_get_digestbyname(value))) {
609 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
612 return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md);
615 if (!strcmp(type, "rsa_oaep_md")) {
617 if (!(md = EVP_get_digestbyname(value))) {
618 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
621 return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md);
623 if (!strcmp(type, "rsa_oaep_label")) {
627 lab = string_to_hex(value, &lablen);
630 ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
639 static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
642 RSA_PKEY_CTX *rctx = ctx->data;
645 if (!rctx->pub_exp) {
646 rctx->pub_exp = BN_new();
647 if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
653 if (ctx->pkey_gencb) {
654 pcb = BN_GENCB_new();
659 evp_pkey_set_cb_translate(pcb, ctx);
662 ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
665 EVP_PKEY_assign_RSA(pkey, rsa);
671 const EVP_PKEY_METHOD rsa_pkey_meth = {
673 EVP_PKEY_FLAG_AUTOARGLEN,
690 pkey_rsa_verifyrecover,