1 /* crypto/rsa/rsa_pmeth.c */
2 /*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2006.
5 */
6 /* ====================================================================
7 * Copyright (c) 2006-2019 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
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
19 * distribution.
20 *
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/)"
25 *
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.
30 *
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.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
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 * ====================================================================
53 *
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).
57 *
58 */
59
60 #include <stdio.h>
61 #include "cryptlib.h"
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>
70 #endif
71 #ifdef OPENSSL_FIPS
72 # include <openssl/fips.h>
73 #endif
74 #include "evp_locl.h"
75 #include "rsa_locl.h"
76
77 /* RSA pkey context structure */
78
79 typedef struct {
80 /* Key gen parameters */
81 int nbits;
82 BIGNUM *pub_exp;
83 /* Keygen callback info */
84 int gentmp[2];
85 /* RSA padding mode */
86 int pad_mode;
87 /* message digest */
88 const EVP_MD *md;
89 /* message digest for MGF1 */
90 const EVP_MD *mgf1md;
91 /* PSS salt length */
92 int saltlen;
93 /* Temp buffer */
94 unsigned char *tbuf;
95 /* OAEP label */
96 unsigned char *oaep_label;
97 size_t oaep_labellen;
98 } RSA_PKEY_CTX;
99
pkey_rsa_init(EVP_PKEY_CTX * ctx)100 static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
101 {
102 RSA_PKEY_CTX *rctx;
103 rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
104 if (!rctx)
105 return 0;
106 rctx->nbits = 2048;
107 rctx->pub_exp = NULL;
108 rctx->pad_mode = RSA_PKCS1_PADDING;
109 rctx->md = NULL;
110 rctx->mgf1md = NULL;
111 rctx->tbuf = NULL;
112
113 rctx->saltlen = -2;
114
115 rctx->oaep_label = NULL;
116 rctx->oaep_labellen = 0;
117
118 ctx->data = rctx;
119 ctx->keygen_info = rctx->gentmp;
120 ctx->keygen_info_count = 2;
121
122 return 1;
123 }
124
pkey_rsa_copy(EVP_PKEY_CTX * dst,EVP_PKEY_CTX * src)125 static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
126 {
127 RSA_PKEY_CTX *dctx, *sctx;
128 if (!pkey_rsa_init(dst))
129 return 0;
130 sctx = src->data;
131 dctx = dst->data;
132 dctx->nbits = sctx->nbits;
133 if (sctx->pub_exp) {
134 dctx->pub_exp = BN_dup(sctx->pub_exp);
135 if (!dctx->pub_exp)
136 return 0;
137 }
138 dctx->pad_mode = sctx->pad_mode;
139 dctx->md = sctx->md;
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)
146 return 0;
147 dctx->oaep_labellen = sctx->oaep_labellen;
148 }
149 return 1;
150 }
151
setup_tbuf(RSA_PKEY_CTX * ctx,EVP_PKEY_CTX * pk)152 static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
153 {
154 if (ctx->tbuf)
155 return 1;
156 ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
157 if (!ctx->tbuf)
158 return 0;
159 return 1;
160 }
161
pkey_rsa_cleanup(EVP_PKEY_CTX * ctx)162 static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
163 {
164 RSA_PKEY_CTX *rctx = ctx->data;
165 if (rctx) {
166 if (rctx->pub_exp)
167 BN_free(rctx->pub_exp);
168 if (rctx->tbuf)
169 OPENSSL_free(rctx->tbuf);
170 if (rctx->oaep_label)
171 OPENSSL_free(rctx->oaep_label);
172 OPENSSL_free(rctx);
173 }
174 }
175
176 #ifdef OPENSSL_FIPS
177 /*
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
180 * FIPS mode.
181 */
182
pkey_fips_check_rsa(const RSA * rsa,const EVP_MD ** pmd,const EVP_MD ** pmgf1md)183 static int pkey_fips_check_rsa(const RSA *rsa, const EVP_MD **pmd,
184 const EVP_MD **pmgf1md)
185 {
186 int rv = -1;
187
188 if (!FIPS_mode())
189 return 0;
190 if (rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)
191 rv = 0;
192 if (!(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) && rv)
193 return -1;
194 if (*pmd != NULL) {
195 *pmd = FIPS_get_digestbynid(EVP_MD_type(*pmd));
196 if (*pmd == NULL || !((*pmd)->flags & EVP_MD_FLAG_FIPS))
197 return rv;
198 }
199 if (*pmgf1md != NULL) {
200 *pmgf1md = FIPS_get_digestbynid(EVP_MD_type(*pmgf1md));
201 if (*pmgf1md == NULL || !((*pmgf1md)->flags & EVP_MD_FLAG_FIPS))
202 return rv;
203 }
204 return 1;
205 }
206 #endif
207
pkey_rsa_sign(EVP_PKEY_CTX * ctx,unsigned char * sig,size_t * siglen,const unsigned char * tbs,size_t tbslen)208 static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
209 size_t *siglen, const unsigned char *tbs,
210 size_t tbslen)
211 {
212 int ret;
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;
217
218 #ifdef OPENSSL_FIPS
219 ret = pkey_fips_check_rsa(rsa, &md, &mgf1md);
220 if (ret < 0) {
221 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
222 return -1;
223 }
224 #endif
225
226 if (md != NULL) {
227 if (tbslen != (size_t)EVP_MD_size(md)) {
228 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_INVALID_DIGEST_LENGTH);
229 return -1;
230 }
231 #ifdef OPENSSL_FIPS
232 if (ret > 0) {
233 unsigned int slen;
234 ret = FIPS_rsa_sign_digest(rsa, tbs, tbslen, md, rctx->pad_mode,
235 rctx->saltlen, mgf1md, sig, &slen);
236 if (ret > 0)
237 *siglen = slen;
238 else
239 *siglen = 0;
240 return ret;
241 }
242 #endif
243
244 if (EVP_MD_type(md) == NID_mdc2) {
245 unsigned int sltmp;
246 if (rctx->pad_mode != RSA_PKCS1_PADDING)
247 return -1;
248 ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2, tbs, tbslen, sig, &sltmp,
249 rsa);
250
251 if (ret <= 0)
252 return ret;
253 ret = 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);
257 return -1;
258 }
259 if (!setup_tbuf(rctx, ctx)) {
260 RSAerr(RSA_F_PKEY_RSA_SIGN, ERR_R_MALLOC_FAILURE);
261 return -1;
262 }
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) {
268 unsigned int sltmp;
269 ret = RSA_sign(EVP_MD_type(md), tbs, tbslen, sig, &sltmp, rsa);
270 if (ret <= 0)
271 return ret;
272 ret = sltmp;
273 } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
274 if (!setup_tbuf(rctx, ctx))
275 return -1;
276 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa, rctx->tbuf, tbs,
277 md, mgf1md, rctx->saltlen))
278 return -1;
279 ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
280 sig, rsa, RSA_NO_PADDING);
281 } else
282 return -1;
283 } else
284 ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
285 rctx->pad_mode);
286 if (ret < 0)
287 return ret;
288 *siglen = ret;
289 return 1;
290 }
291
pkey_rsa_verifyrecover(EVP_PKEY_CTX * ctx,unsigned char * rout,size_t * routlen,const unsigned char * sig,size_t siglen)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)
295 {
296 int ret;
297 RSA_PKEY_CTX *rctx = ctx->data;
298
299 if (rctx->md) {
300 if (rctx->pad_mode == RSA_X931_PADDING) {
301 if (!setup_tbuf(rctx, ctx))
302 return -1;
303 ret = RSA_public_decrypt(siglen, sig,
304 rctx->tbuf, ctx->pkey->pkey.rsa,
305 RSA_X931_PADDING);
306 if (ret < 1)
307 return 0;
308 ret--;
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);
312 return 0;
313 }
314 if (ret != EVP_MD_size(rctx->md)) {
315 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
316 RSA_R_INVALID_DIGEST_LENGTH);
317 return 0;
318 }
319 if (rout)
320 memcpy(rout, rctx->tbuf, ret);
321 } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
322 size_t sltmp;
323 ret = int_rsa_verify(EVP_MD_type(rctx->md),
324 NULL, 0, rout, &sltmp,
325 sig, siglen, ctx->pkey->pkey.rsa);
326 if (ret <= 0)
327 return 0;
328 ret = sltmp;
329 } else
330 return -1;
331 } else
332 ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
333 rctx->pad_mode);
334 if (ret < 0)
335 return ret;
336 *routlen = ret;
337 return 1;
338 }
339
pkey_rsa_verify(EVP_PKEY_CTX * ctx,const unsigned char * sig,size_t siglen,const unsigned char * tbs,size_t tbslen)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)
343 {
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;
348 size_t rslen;
349
350 #ifdef OPENSSL_FIPS
351 int rv = pkey_fips_check_rsa(rsa, &md, &mgf1md);
352
353 if (rv < 0) {
354 RSAerr(RSA_F_PKEY_RSA_VERIFY,
355 RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
356 return -1;
357 }
358 #endif
359 if (md != NULL) {
360 #ifdef OPENSSL_FIPS
361 if (rv > 0) {
362 return FIPS_rsa_verify_digest(rsa, tbs, tbslen, md, rctx->pad_mode,
363 rctx->saltlen, mgf1md, sig, siglen);
364
365 }
366 #endif
367 if (rctx->pad_mode == RSA_PKCS1_PADDING)
368 return RSA_verify(EVP_MD_type(md), tbs, tbslen,
369 sig, siglen, rsa);
370 if (tbslen != (size_t)EVP_MD_size(md)) {
371 RSAerr(RSA_F_PKEY_RSA_VERIFY, RSA_R_INVALID_DIGEST_LENGTH);
372 return -1;
373 }
374 if (rctx->pad_mode == RSA_X931_PADDING) {
375 if (pkey_rsa_verifyrecover(ctx, NULL, &rslen, sig, siglen) <= 0)
376 return 0;
377 } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
378 int ret;
379 if (!setup_tbuf(rctx, ctx))
380 return -1;
381 ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
382 rsa, RSA_NO_PADDING);
383 if (ret <= 0)
384 return 0;
385 ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs, md, mgf1md,
386 rctx->tbuf, rctx->saltlen);
387 if (ret <= 0)
388 return 0;
389 return 1;
390 } else
391 return -1;
392 } else {
393 if (!setup_tbuf(rctx, ctx))
394 return -1;
395 rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
396 rsa, rctx->pad_mode);
397 if (rslen == 0)
398 return 0;
399 }
400
401 if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
402 return 0;
403
404 return 1;
405
406 }
407
pkey_rsa_encrypt(EVP_PKEY_CTX * ctx,unsigned char * out,size_t * outlen,const unsigned char * in,size_t inlen)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)
411 {
412 int ret;
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))
417 return -1;
418 if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx->tbuf, klen,
419 in, inlen,
420 rctx->oaep_label,
421 rctx->oaep_labellen,
422 rctx->md, rctx->mgf1md))
423 return -1;
424 ret = RSA_public_encrypt(klen, rctx->tbuf, out,
425 ctx->pkey->pkey.rsa, RSA_NO_PADDING);
426 } else
427 ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
428 rctx->pad_mode);
429 if (ret < 0)
430 return ret;
431 *outlen = ret;
432 return 1;
433 }
434
pkey_rsa_decrypt(EVP_PKEY_CTX * ctx,unsigned char * out,size_t * outlen,const unsigned char * in,size_t inlen)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)
438 {
439 int ret;
440 RSA_PKEY_CTX *rctx = ctx->data;
441 if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
442 if (!setup_tbuf(rctx, ctx))
443 return -1;
444 ret = RSA_private_decrypt(inlen, in, rctx->tbuf,
445 ctx->pkey->pkey.rsa, RSA_NO_PADDING);
446 if (ret <= 0)
447 return ret;
448 ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, ret, rctx->tbuf,
449 ret, ret,
450 rctx->oaep_label,
451 rctx->oaep_labellen,
452 rctx->md, rctx->mgf1md);
453 } else
454 ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
455 rctx->pad_mode);
456 if (ret < 0)
457 return ret;
458 *outlen = ret;
459 return 1;
460 }
461
check_padding_md(const EVP_MD * md,int padding)462 static int check_padding_md(const EVP_MD *md, int padding)
463 {
464 if (!md)
465 return 1;
466
467 if (padding == RSA_NO_PADDING) {
468 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
469 return 0;
470 }
471
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);
475 return 0;
476 }
477 return 1;
478 }
479
480 return 1;
481 }
482
pkey_rsa_ctrl(EVP_PKEY_CTX * ctx,int type,int p1,void * p2)483 static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
484 {
485 RSA_PKEY_CTX *rctx = ctx->data;
486 switch (type) {
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))
490 return 0;
491 if (p1 == RSA_PKCS1_PSS_PADDING) {
492 if (!(ctx->operation &
493 (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
494 goto bad_pad;
495 if (!rctx->md)
496 rctx->md = EVP_sha1();
497 }
498 if (p1 == RSA_PKCS1_OAEP_PADDING) {
499 if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
500 goto bad_pad;
501 if (!rctx->md)
502 rctx->md = EVP_sha1();
503 }
504 rctx->pad_mode = p1;
505 return 1;
506 }
507 bad_pad:
508 RSAerr(RSA_F_PKEY_RSA_CTRL,
509 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
510 return -2;
511
512 case EVP_PKEY_CTRL_GET_RSA_PADDING:
513 *(int *)p2 = rctx->pad_mode;
514 return 1;
515
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);
520 return -2;
521 }
522 if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
523 *(int *)p2 = rctx->saltlen;
524 else {
525 if (p1 < -2)
526 return -2;
527 rctx->saltlen = p1;
528 }
529 return 1;
530
531 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
532 if (p1 < 256) {
533 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
534 return -2;
535 }
536 rctx->nbits = p1;
537 return 1;
538
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);
542 return -2;
543 }
544 BN_free(rctx->pub_exp);
545 rctx->pub_exp = p2;
546 return 1;
547
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);
552 return -2;
553 }
554 if (type == EVP_PKEY_CTRL_GET_RSA_OAEP_MD)
555 *(const EVP_MD **)p2 = rctx->md;
556 else
557 rctx->md = p2;
558 return 1;
559
560 case EVP_PKEY_CTRL_MD:
561 if (!check_padding_md(p2, rctx->pad_mode))
562 return 0;
563 rctx->md = p2;
564 return 1;
565
566 case EVP_PKEY_CTRL_GET_MD:
567 *(const EVP_MD **)p2 = rctx->md;
568 return 1;
569
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);
575 return -2;
576 }
577 if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD) {
578 if (rctx->mgf1md)
579 *(const EVP_MD **)p2 = rctx->mgf1md;
580 else
581 *(const EVP_MD **)p2 = rctx->md;
582 } else
583 rctx->mgf1md = p2;
584 return 1;
585
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);
589 return -2;
590 }
591 if (rctx->oaep_label)
592 OPENSSL_free(rctx->oaep_label);
593 if (p2 && p1 > 0) {
594 rctx->oaep_label = p2;
595 rctx->oaep_labellen = p1;
596 } else {
597 rctx->oaep_label = NULL;
598 rctx->oaep_labellen = 0;
599 }
600 return 1;
601
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);
605 return -2;
606 }
607 *(unsigned char **)p2 = rctx->oaep_label;
608 return rctx->oaep_labellen;
609
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:
614 return 1;
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:
619 return 1;
620 #endif
621 case EVP_PKEY_CTRL_PEER_KEY:
622 RSAerr(RSA_F_PKEY_RSA_CTRL,
623 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
624 return -2;
625
626 default:
627 return -2;
628
629 }
630 }
631
pkey_rsa_ctrl_str(EVP_PKEY_CTX * ctx,const char * type,const char * value)632 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
633 const char *type, const char *value)
634 {
635 if (!value) {
636 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
637 return 0;
638 }
639 if (!strcmp(type, "rsa_padding_mode")) {
640 int pm;
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"))
646 pm = RSA_NO_PADDING;
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;
655 else {
656 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_UNKNOWN_PADDING_TYPE);
657 return -2;
658 }
659 return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
660 }
661
662 if (!strcmp(type, "rsa_pss_saltlen")) {
663 int saltlen;
664 saltlen = atoi(value);
665 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
666 }
667
668 if (!strcmp(type, "rsa_keygen_bits")) {
669 int nbits;
670 nbits = atoi(value);
671 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
672 }
673
674 if (!strcmp(type, "rsa_keygen_pubexp")) {
675 int ret;
676 BIGNUM *pubexp = NULL;
677 if (!BN_asc2bn(&pubexp, value))
678 return 0;
679 ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
680 if (ret <= 0)
681 BN_free(pubexp);
682 return ret;
683 }
684
685 if (!strcmp(type, "rsa_mgf1_md")) {
686 const EVP_MD *md;
687 if (!(md = EVP_get_digestbyname(value))) {
688 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
689 return 0;
690 }
691 return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md);
692 }
693
694 if (!strcmp(type, "rsa_oaep_md")) {
695 const EVP_MD *md;
696 if (!(md = EVP_get_digestbyname(value))) {
697 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
698 return 0;
699 }
700 return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md);
701 }
702 if (!strcmp(type, "rsa_oaep_label")) {
703 unsigned char *lab;
704 long lablen;
705 int ret;
706 lab = string_to_hex(value, &lablen);
707 if (!lab)
708 return 0;
709 ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
710 if (ret <= 0)
711 OPENSSL_free(lab);
712 return ret;
713 }
714
715 return -2;
716 }
717
pkey_rsa_keygen(EVP_PKEY_CTX * ctx,EVP_PKEY * pkey)718 static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
719 {
720 RSA *rsa = NULL;
721 RSA_PKEY_CTX *rctx = ctx->data;
722 BN_GENCB *pcb, cb;
723 int ret;
724 if (!rctx->pub_exp) {
725 rctx->pub_exp = BN_new();
726 if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
727 return 0;
728 }
729 rsa = RSA_new();
730 if (!rsa)
731 return 0;
732 if (ctx->pkey_gencb) {
733 pcb = &cb;
734 evp_pkey_set_cb_translate(pcb, ctx);
735 } else
736 pcb = NULL;
737 ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
738 if (ret > 0)
739 EVP_PKEY_assign_RSA(pkey, rsa);
740 else
741 RSA_free(rsa);
742 return ret;
743 }
744
745 const EVP_PKEY_METHOD rsa_pkey_meth = {
746 EVP_PKEY_RSA,
747 EVP_PKEY_FLAG_AUTOARGLEN,
748 pkey_rsa_init,
749 pkey_rsa_copy,
750 pkey_rsa_cleanup,
751
752 0, 0,
753
754 0,
755 pkey_rsa_keygen,
756
757 0,
758 pkey_rsa_sign,
759
760 0,
761 pkey_rsa_verify,
762
763 0,
764 pkey_rsa_verifyrecover,
765
766 0, 0, 0, 0,
767
768 0,
769 pkey_rsa_encrypt,
770
771 0,
772 pkey_rsa_decrypt,
773
774 0, 0,
775
776 pkey_rsa_ctrl,
777 pkey_rsa_ctrl_str
778 };
779