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>
69 /* RSA pkey context structure */
73 /* Key gen parameters */
76 /* Keygen callback info */
78 /* RSA padding mode */
82 /* PSS/OAEP salt length */
88 static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
91 rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
96 rctx->pad_mode = RSA_PKCS1_PADDING;
103 ctx->keygen_info = rctx->gentmp;
104 ctx->keygen_info_count = 2;
109 static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
111 RSA_PKEY_CTX *dctx, *sctx;
112 if (!pkey_rsa_init(dst))
116 dctx->nbits = sctx->nbits;
119 dctx->pub_exp = BN_dup(sctx->pub_exp);
123 dctx->pad_mode = sctx->pad_mode;
128 static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
132 ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
138 static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
140 RSA_PKEY_CTX *rctx = ctx->data;
144 BN_free(rctx->pub_exp);
146 OPENSSL_free(rctx->tbuf);
151 static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
152 const unsigned char *tbs, size_t tbslen)
155 RSA_PKEY_CTX *rctx = ctx->data;
156 RSA *rsa = ctx->pkey->pkey.rsa;
160 if (tbslen != (size_t)EVP_MD_size(rctx->md))
162 RSAerr(RSA_F_PKEY_RSA_SIGN,
163 RSA_R_INVALID_DIGEST_LENGTH);
166 if (rctx->pad_mode == RSA_X931_PADDING)
168 if (!setup_tbuf(rctx, ctx))
170 memcpy(rctx->tbuf, tbs, tbslen);
172 RSA_X931_hash_id(EVP_MD_type(rctx->md));
173 ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
174 sig, rsa, RSA_X931_PADDING);
176 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
179 ret = RSA_sign(EVP_MD_type(rctx->md),
180 tbs, tbslen, sig, &sltmp, rsa);
185 else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
187 if (!setup_tbuf(rctx, ctx))
189 if (!RSA_padding_add_PKCS1_PSS(rsa, rctx->tbuf, tbs,
190 rctx->md, rctx->saltlen))
192 ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
193 sig, rsa, RSA_NO_PADDING);
199 ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
208 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
209 unsigned char *rout, size_t *routlen,
210 const unsigned char *sig, size_t siglen)
213 RSA_PKEY_CTX *rctx = ctx->data;
217 if (rctx->pad_mode == RSA_X931_PADDING)
219 if (!setup_tbuf(rctx, ctx))
221 ret = RSA_public_decrypt(siglen, sig,
222 rctx->tbuf, ctx->pkey->pkey.rsa,
227 if (rctx->tbuf[ret] !=
228 RSA_X931_hash_id(EVP_MD_type(rctx->md)))
230 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
231 RSA_R_ALGORITHM_MISMATCH);
234 if (ret != EVP_MD_size(rctx->md))
236 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
237 RSA_R_INVALID_DIGEST_LENGTH);
241 memcpy(rout, rctx->tbuf, ret);
243 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
246 ret = int_rsa_verify(EVP_MD_type(rctx->md),
247 NULL, 0, rout, &sltmp,
248 sig, siglen, ctx->pkey->pkey.rsa);
257 ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
265 static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
266 const unsigned char *sig, size_t siglen,
267 const unsigned char *tbs, size_t tbslen)
269 RSA_PKEY_CTX *rctx = ctx->data;
270 RSA *rsa = ctx->pkey->pkey.rsa;
274 if (rctx->pad_mode == RSA_PKCS1_PADDING)
275 return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
277 if (rctx->pad_mode == RSA_X931_PADDING)
279 if (pkey_rsa_verifyrecover(ctx, NULL, &rslen,
283 else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
286 if (!setup_tbuf(rctx, ctx))
288 ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
289 rsa, RSA_NO_PADDING);
292 ret = RSA_verify_PKCS1_PSS(rsa, tbs, rctx->md,
293 rctx->tbuf, rctx->saltlen);
303 if (!setup_tbuf(rctx, ctx))
305 rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
306 rsa, rctx->pad_mode);
311 if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
319 static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
320 unsigned char *out, size_t *outlen,
321 const unsigned char *in, size_t inlen)
324 RSA_PKEY_CTX *rctx = ctx->data;
325 ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
333 static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
334 unsigned char *out, size_t *outlen,
335 const unsigned char *in, size_t inlen)
338 RSA_PKEY_CTX *rctx = ctx->data;
339 ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
347 static int check_padding_md(const EVP_MD *md, int padding)
352 if (padding == RSA_NO_PADDING)
354 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
358 if (padding == RSA_X931_PADDING)
360 if (RSA_X931_hash_id(EVP_MD_type(md)) == -1)
362 RSAerr(RSA_F_CHECK_PADDING_MD,
363 RSA_R_INVALID_X931_DIGEST);
373 static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
375 RSA_PKEY_CTX *rctx = ctx->data;
378 case EVP_PKEY_CTRL_RSA_PADDING:
379 if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING))
381 if (!check_padding_md(rctx->md, p1))
383 if (p1 == RSA_PKCS1_PSS_PADDING)
385 if (!(ctx->operation &
386 (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
389 rctx->md = EVP_sha1();
391 if (p1 == RSA_PKCS1_OAEP_PADDING)
393 if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
396 rctx->md = EVP_sha1();
402 RSAerr(RSA_F_PKEY_RSA_CTRL,
403 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
406 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
409 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
411 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
417 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
420 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
426 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
432 case EVP_PKEY_CTRL_MD:
433 if (!check_padding_md(p2, rctx->pad_mode))
438 case EVP_PKEY_CTRL_DIGESTINIT:
439 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
440 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
441 case EVP_PKEY_CTRL_PKCS7_SIGN:
442 #ifndef OPENSSL_NO_CMS
443 case EVP_PKEY_CTRL_CMS_ENCRYPT:
444 case EVP_PKEY_CTRL_CMS_DECRYPT:
445 case EVP_PKEY_CTRL_CMS_SIGN:
448 case EVP_PKEY_CTRL_PEER_KEY:
449 RSAerr(RSA_F_PKEY_RSA_CTRL,
450 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
459 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
460 const char *type, const char *value)
464 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
467 if (!strcmp(type, "rsa_padding_mode"))
470 if (!strcmp(value, "pkcs1"))
471 pm = RSA_PKCS1_PADDING;
472 else if (!strcmp(value, "sslv23"))
473 pm = RSA_SSLV23_PADDING;
474 else if (!strcmp(value, "none"))
476 else if (!strcmp(value, "oeap"))
477 pm = RSA_PKCS1_OAEP_PADDING;
478 else if (!strcmp(value, "x931"))
479 pm = RSA_X931_PADDING;
480 else if (!strcmp(value, "pss"))
481 pm = RSA_PKCS1_PSS_PADDING;
484 RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
485 RSA_R_UNKNOWN_PADDING_TYPE);
488 return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
491 if (!strcmp(type, "rsa_pss_saltlen"))
494 saltlen = atoi(value);
495 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
498 if (!strcmp(type, "rsa_keygen_bits"))
502 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
505 if (!strcmp(type, "rsa_keygen_pubexp"))
508 BIGNUM *pubexp = NULL;
509 if (!BN_asc2bn(&pubexp, value))
511 ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
520 static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
523 RSA_PKEY_CTX *rctx = ctx->data;
528 rctx->pub_exp = BN_new();
529 if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
538 evp_pkey_set_cb_translate(pcb, ctx);
542 ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
544 EVP_PKEY_assign_RSA(pkey, rsa);
550 const EVP_PKEY_METHOD rsa_pkey_meth =
553 EVP_PKEY_FLAG_AUTOARGLEN,
570 pkey_rsa_verifyrecover,