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>
67 #include <openssl/fips.h>
72 /* RSA pkey context structure */
76 /* Key gen parameters */
79 /* Keygen callback info */
81 /* RSA padding mode */
85 /* message digest for MGF1 */
87 /* PSS/OAEP salt length */
93 static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
96 rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
100 rctx->pub_exp = NULL;
101 rctx->pad_mode = RSA_PKCS1_PADDING;
109 ctx->keygen_info = rctx->gentmp;
110 ctx->keygen_info_count = 2;
115 static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
117 RSA_PKEY_CTX *dctx, *sctx;
118 if (!pkey_rsa_init(dst))
122 dctx->nbits = sctx->nbits;
125 dctx->pub_exp = BN_dup(sctx->pub_exp);
129 dctx->pad_mode = sctx->pad_mode;
134 static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
138 ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
144 static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
146 RSA_PKEY_CTX *rctx = ctx->data;
150 BN_free(rctx->pub_exp);
152 OPENSSL_free(rctx->tbuf);
157 /* FIP checker. Return value indicates status of context parameters:
158 * 1 : redirect to FIPS.
159 * 0 : don't redirect to FIPS.
160 * -1 : illegal operation in FIPS mode.
163 static int pkey_fips_check_ctx(EVP_PKEY_CTX *ctx)
165 RSA_PKEY_CTX *rctx = ctx->data;
166 RSA *rsa = ctx->pkey->pkey.rsa;
170 if (rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)
172 if (!(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) && rv)
174 if (rctx->md && !(rctx->md->flags & EVP_MD_FLAG_FIPS))
176 if (rctx->mgf1md && !(rctx->mgf1md->flags & EVP_MD_FLAG_FIPS))
181 static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
182 const unsigned char *tbs, size_t tbslen)
185 RSA_PKEY_CTX *rctx = ctx->data;
186 RSA *rsa = ctx->pkey->pkey.rsa;
189 ret = pkey_fips_check_ctx(ctx);
192 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
199 if (tbslen != (size_t)EVP_MD_size(rctx->md))
201 RSAerr(RSA_F_PKEY_RSA_SIGN,
202 RSA_R_INVALID_DIGEST_LENGTH);
209 ret = FIPS_rsa_sign_digest(rsa, tbs, tbslen, rctx->md,
221 if (rctx->pad_mode == RSA_X931_PADDING)
223 if (!setup_tbuf(rctx, ctx))
225 memcpy(rctx->tbuf, tbs, tbslen);
227 RSA_X931_hash_id(EVP_MD_type(rctx->md));
228 ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
229 sig, rsa, RSA_X931_PADDING);
231 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
234 ret = RSA_sign(EVP_MD_type(rctx->md),
235 tbs, tbslen, sig, &sltmp, rsa);
240 else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
242 if (!setup_tbuf(rctx, ctx))
244 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa,
246 rctx->md, rctx->mgf1md,
249 ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
250 sig, rsa, RSA_NO_PADDING);
256 ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
265 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
266 unsigned char *rout, size_t *routlen,
267 const unsigned char *sig, size_t siglen)
270 RSA_PKEY_CTX *rctx = ctx->data;
274 if (rctx->pad_mode == RSA_X931_PADDING)
276 if (!setup_tbuf(rctx, ctx))
278 ret = RSA_public_decrypt(siglen, sig,
279 rctx->tbuf, ctx->pkey->pkey.rsa,
284 if (rctx->tbuf[ret] !=
285 RSA_X931_hash_id(EVP_MD_type(rctx->md)))
287 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
288 RSA_R_ALGORITHM_MISMATCH);
291 if (ret != EVP_MD_size(rctx->md))
293 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
294 RSA_R_INVALID_DIGEST_LENGTH);
298 memcpy(rout, rctx->tbuf, ret);
300 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
303 ret = int_rsa_verify(EVP_MD_type(rctx->md),
304 NULL, 0, rout, &sltmp,
305 sig, siglen, ctx->pkey->pkey.rsa);
314 ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
322 static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
323 const unsigned char *sig, size_t siglen,
324 const unsigned char *tbs, size_t tbslen)
326 RSA_PKEY_CTX *rctx = ctx->data;
327 RSA *rsa = ctx->pkey->pkey.rsa;
331 rv = pkey_fips_check_ctx(ctx);
334 RSAerr(RSA_F_PKEY_RSA_VERIFY, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
343 return FIPS_rsa_verify_digest(rsa,
353 if (rctx->pad_mode == RSA_PKCS1_PADDING)
354 return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
356 if (rctx->pad_mode == RSA_X931_PADDING)
358 if (pkey_rsa_verifyrecover(ctx, NULL, &rslen,
362 else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
365 if (!setup_tbuf(rctx, ctx))
367 ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
368 rsa, RSA_NO_PADDING);
371 ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs,
372 rctx->md, rctx->mgf1md,
373 rctx->tbuf, rctx->saltlen);
383 if (!setup_tbuf(rctx, ctx))
385 rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
386 rsa, rctx->pad_mode);
391 if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
399 static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
400 unsigned char *out, size_t *outlen,
401 const unsigned char *in, size_t inlen)
404 RSA_PKEY_CTX *rctx = ctx->data;
405 ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
413 static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
414 unsigned char *out, size_t *outlen,
415 const unsigned char *in, size_t inlen)
418 RSA_PKEY_CTX *rctx = ctx->data;
419 ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
427 static int check_padding_md(const EVP_MD *md, int padding)
432 if (padding == RSA_NO_PADDING)
434 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
438 if (padding == RSA_X931_PADDING)
440 if (RSA_X931_hash_id(EVP_MD_type(md)) == -1)
442 RSAerr(RSA_F_CHECK_PADDING_MD,
443 RSA_R_INVALID_X931_DIGEST);
453 static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
455 RSA_PKEY_CTX *rctx = ctx->data;
458 case EVP_PKEY_CTRL_RSA_PADDING:
459 if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING))
461 if (!check_padding_md(rctx->md, p1))
463 if (p1 == RSA_PKCS1_PSS_PADDING)
465 if (!(ctx->operation &
466 (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
469 rctx->md = EVP_sha1();
471 if (p1 == RSA_PKCS1_OAEP_PADDING)
473 if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
476 rctx->md = EVP_sha1();
482 RSAerr(RSA_F_PKEY_RSA_CTRL,
483 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
486 case EVP_PKEY_CTRL_GET_RSA_PADDING:
487 *(int *)p2 = rctx->pad_mode;
490 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
491 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
492 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
494 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
497 if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
498 *(int *)p2 = rctx->saltlen;
507 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
510 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
516 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
522 case EVP_PKEY_CTRL_MD:
523 if (!check_padding_md(p2, rctx->pad_mode))
528 case EVP_PKEY_CTRL_RSA_MGF1_MD:
529 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
530 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
532 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_MGF1_MD);
535 if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD)
538 *(const EVP_MD **)p2 = rctx->mgf1md;
540 *(const EVP_MD **)p2 = rctx->md;
546 case EVP_PKEY_CTRL_DIGESTINIT:
547 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
548 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
549 case EVP_PKEY_CTRL_PKCS7_SIGN:
550 #ifndef OPENSSL_NO_CMS
551 case EVP_PKEY_CTRL_CMS_ENCRYPT:
552 case EVP_PKEY_CTRL_CMS_DECRYPT:
553 case EVP_PKEY_CTRL_CMS_SIGN:
556 case EVP_PKEY_CTRL_PEER_KEY:
557 RSAerr(RSA_F_PKEY_RSA_CTRL,
558 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
567 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
568 const char *type, const char *value)
572 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
575 if (!strcmp(type, "rsa_padding_mode"))
578 if (!strcmp(value, "pkcs1"))
579 pm = RSA_PKCS1_PADDING;
580 else if (!strcmp(value, "sslv23"))
581 pm = RSA_SSLV23_PADDING;
582 else if (!strcmp(value, "none"))
584 else if (!strcmp(value, "oeap"))
585 pm = RSA_PKCS1_OAEP_PADDING;
586 else if (!strcmp(value, "x931"))
587 pm = RSA_X931_PADDING;
588 else if (!strcmp(value, "pss"))
589 pm = RSA_PKCS1_PSS_PADDING;
592 RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
593 RSA_R_UNKNOWN_PADDING_TYPE);
596 return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
599 if (!strcmp(type, "rsa_pss_saltlen"))
602 saltlen = atoi(value);
603 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
606 if (!strcmp(type, "rsa_keygen_bits"))
610 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
613 if (!strcmp(type, "rsa_keygen_pubexp"))
616 BIGNUM *pubexp = NULL;
617 if (!BN_asc2bn(&pubexp, value))
619 ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
628 static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
631 RSA_PKEY_CTX *rctx = ctx->data;
636 rctx->pub_exp = BN_new();
637 if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
646 evp_pkey_set_cb_translate(pcb, ctx);
650 ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
652 EVP_PKEY_assign_RSA(pkey, rsa);
658 const EVP_PKEY_METHOD rsa_pkey_meth =
661 EVP_PKEY_FLAG_AUTOARGLEN,
678 pkey_rsa_verifyrecover,