1 /* crypto/rsa/rsa_pmeth.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2006.
4 */
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
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
18 * distribution.
19 *
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/)"
24 *
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.
29 *
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.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
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 * ====================================================================
52 *
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).
56 *
57 */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
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>
66 #ifndef OPENSSL_NO_CMS
67 #include <openssl/cms.h>
68 #endif
69 #ifdef OPENSSL_FIPS
70 #include <openssl/fips.h>
71 #endif
72 #include "evp_locl.h"
73 #include "rsa_locl.h"
74
75 /* RSA pkey context structure */
76
77 typedef struct
78 {
79 /* Key gen parameters */
80 int nbits;
81 BIGNUM *pub_exp;
82 /* Keygen callback info */
83 int gentmp[2];
84 /* RSA padding mode */
85 int pad_mode;
86 /* message digest */
87 const EVP_MD *md;
88 /* message digest for MGF1 */
89 const EVP_MD *mgf1md;
90 /* PSS/OAEP salt length */
91 int saltlen;
92 /* Temp buffer */
93 unsigned char *tbuf;
94 } RSA_PKEY_CTX;
95
96 static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
97 {
98 RSA_PKEY_CTX *rctx;
99 rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
100 if (!rctx)
101 return 0;
102 rctx->nbits = 1024;
103 rctx->pub_exp = NULL;
104 rctx->pad_mode = RSA_PKCS1_PADDING;
105 rctx->md = NULL;
106 rctx->mgf1md = NULL;
107 rctx->tbuf = NULL;
108
109 rctx->saltlen = -2;
110
111 ctx->data = rctx;
112 ctx->keygen_info = rctx->gentmp;
113 ctx->keygen_info_count = 2;
114
115 return 1;
116 }
117
118 static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
119 {
120 RSA_PKEY_CTX *dctx, *sctx;
121 if (!pkey_rsa_init(dst))
122 return 0;
123 sctx = src->data;
124 dctx = dst->data;
125 dctx->nbits = sctx->nbits;
126 if (sctx->pub_exp)
127 {
128 dctx->pub_exp = BN_dup(sctx->pub_exp);
129 if (!dctx->pub_exp)
130 return 0;
131 }
132 dctx->pad_mode = sctx->pad_mode;
133 dctx->md = sctx->md;
134 return 1;
135 }
136
137 static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
138 {
139 if (ctx->tbuf)
140 return 1;
141 ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
142 if (!ctx->tbuf)
143 return 0;
144 return 1;
145 }
146
147 static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
148 {
149 RSA_PKEY_CTX *rctx = ctx->data;
150 if (rctx)
151 {
152 if (rctx->pub_exp)
153 BN_free(rctx->pub_exp);
154 if (rctx->tbuf)
155 OPENSSL_free(rctx->tbuf);
156 OPENSSL_free(rctx);
157 }
158 }
159 #ifdef OPENSSL_FIPS
160 /* FIP checker. Return value indicates status of context parameters:
161 * 1 : redirect to FIPS.
162 * 0 : don't redirect to FIPS.
163 * -1 : illegal operation in FIPS mode.
164 */
165
166 static int pkey_fips_check_ctx(EVP_PKEY_CTX *ctx)
167 {
168 RSA_PKEY_CTX *rctx = ctx->data;
169 RSA *rsa = ctx->pkey->pkey.rsa;
170 int rv = -1;
171 if (!FIPS_mode())
172 return 0;
173 if (rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)
174 rv = 0;
175 if (!(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) && rv)
176 return -1;
177 if (rctx->md && !(rctx->md->flags & EVP_MD_FLAG_FIPS))
178 return rv;
179 if (rctx->mgf1md && !(rctx->mgf1md->flags & EVP_MD_FLAG_FIPS))
180 return rv;
181 return 1;
182 }
183 #endif
184
185 static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
186 const unsigned char *tbs, size_t tbslen)
187 {
188 int ret;
189 RSA_PKEY_CTX *rctx = ctx->data;
190 RSA *rsa = ctx->pkey->pkey.rsa;
191
192 #ifdef OPENSSL_FIPS
193 ret = pkey_fips_check_ctx(ctx);
194 if (ret < 0)
195 {
196 RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
197 return -1;
198 }
199 #endif
200
201 if (rctx->md)
202 {
203 if (tbslen != (size_t)EVP_MD_size(rctx->md))
204 {
205 RSAerr(RSA_F_PKEY_RSA_SIGN,
206 RSA_R_INVALID_DIGEST_LENGTH);
207 return -1;
208 }
209 #ifdef OPENSSL_FIPS
210 if (ret > 0)
211 {
212 unsigned int slen;
213 ret = FIPS_rsa_sign_digest(rsa, tbs, tbslen, rctx->md,
214 rctx->pad_mode,
215 rctx->saltlen,
216 rctx->mgf1md,
217 sig, &slen);
218 if (ret > 0)
219 *siglen = slen;
220 else
221 *siglen = 0;
222 return ret;
223 }
224 #endif
225
226 if (EVP_MD_type(rctx->md) == NID_mdc2)
227 {
228 unsigned int sltmp;
229 if (rctx->pad_mode != RSA_PKCS1_PADDING)
230 return -1;
231 ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2,
232 tbs, tbslen, sig, &sltmp, rsa);
233
234 if (ret <= 0)
235 return ret;
236 ret = sltmp;
237 }
238 else if (rctx->pad_mode == RSA_X931_PADDING)
239 {
240 if (!setup_tbuf(rctx, ctx))
241 return -1;
242 memcpy(rctx->tbuf, tbs, tbslen);
243 rctx->tbuf[tbslen] =
244 RSA_X931_hash_id(EVP_MD_type(rctx->md));
245 ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
246 sig, rsa, RSA_X931_PADDING);
247 }
248 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
249 {
250 unsigned int sltmp;
251 ret = RSA_sign(EVP_MD_type(rctx->md),
252 tbs, tbslen, sig, &sltmp, rsa);
253 if (ret <= 0)
254 return ret;
255 ret = sltmp;
256 }
257 else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
258 {
259 if (!setup_tbuf(rctx, ctx))
260 return -1;
261 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa,
262 rctx->tbuf, tbs,
263 rctx->md, rctx->mgf1md,
264 rctx->saltlen))
265 return -1;
266 ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
267 sig, rsa, RSA_NO_PADDING);
268 }
269 else
270 return -1;
271 }
272 else
273 ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
274 rctx->pad_mode);
275 if (ret < 0)
276 return ret;
277 *siglen = ret;
278 return 1;
279 }
280
281
282 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
283 unsigned char *rout, size_t *routlen,
284 const unsigned char *sig, size_t siglen)
285 {
286 int ret;
287 RSA_PKEY_CTX *rctx = ctx->data;
288
289 if (rctx->md)
290 {
291 if (rctx->pad_mode == RSA_X931_PADDING)
292 {
293 if (!setup_tbuf(rctx, ctx))
294 return -1;
295 ret = RSA_public_decrypt(siglen, sig,
296 rctx->tbuf, ctx->pkey->pkey.rsa,
297 RSA_X931_PADDING);
298 if (ret < 1)
299 return 0;
300 ret--;
301 if (rctx->tbuf[ret] !=
302 RSA_X931_hash_id(EVP_MD_type(rctx->md)))
303 {
304 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
305 RSA_R_ALGORITHM_MISMATCH);
306 return 0;
307 }
308 if (ret != EVP_MD_size(rctx->md))
309 {
310 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
311 RSA_R_INVALID_DIGEST_LENGTH);
312 return 0;
313 }
314 if (rout)
315 memcpy(rout, rctx->tbuf, ret);
316 }
317 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
318 {
319 size_t sltmp;
320 ret = int_rsa_verify(EVP_MD_type(rctx->md),
321 NULL, 0, rout, &sltmp,
322 sig, siglen, ctx->pkey->pkey.rsa);
323 if (ret <= 0)
324 return 0;
325 ret = sltmp;
326 }
327 else
328 return -1;
329 }
330 else
331 ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
332 rctx->pad_mode);
333 if (ret < 0)
334 return ret;
335 *routlen = ret;
336 return 1;
337 }
338
339 static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
340 const unsigned char *sig, size_t siglen,
341 const unsigned char *tbs, size_t tbslen)
342 {
343 RSA_PKEY_CTX *rctx = ctx->data;
344 RSA *rsa = ctx->pkey->pkey.rsa;
345 size_t rslen;
346 #ifdef OPENSSL_FIPS
347 int rv;
348 rv = pkey_fips_check_ctx(ctx);
349 if (rv < 0)
350 {
351 RSAerr(RSA_F_PKEY_RSA_VERIFY, RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE);
352 return -1;
353 }
354 #endif
355 if (rctx->md)
356 {
357 #ifdef OPENSSL_FIPS
358 if (rv > 0)
359 {
360 return FIPS_rsa_verify_digest(rsa,
361 tbs, tbslen,
362 rctx->md,
363 rctx->pad_mode,
364 rctx->saltlen,
365 rctx->mgf1md,
366 sig, siglen);
367
368 }
369 #endif
370 if (rctx->pad_mode == RSA_PKCS1_PADDING)
371 return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
372 sig, siglen, rsa);
373 if (rctx->pad_mode == RSA_X931_PADDING)
374 {
375 if (pkey_rsa_verifyrecover(ctx, NULL, &rslen,
376 sig, siglen) <= 0)
377 return 0;
378 }
379 else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING)
380 {
381 int ret;
382 if (!setup_tbuf(rctx, ctx))
383 return -1;
384 ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
385 rsa, RSA_NO_PADDING);
386 if (ret <= 0)
387 return 0;
388 ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs,
389 rctx->md, rctx->mgf1md,
390 rctx->tbuf, rctx->saltlen);
391 if (ret <= 0)
392 return 0;
393 return 1;
394 }
395 else
396 return -1;
397 }
398 else
399 {
400 if (!setup_tbuf(rctx, ctx))
401 return -1;
402 rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
403 rsa, rctx->pad_mode);
404 if (rslen == 0)
405 return 0;
406 }
407
408 if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
409 return 0;
410
411 return 1;
412
413 }
414
415
416 static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
417 unsigned char *out, size_t *outlen,
418 const unsigned char *in, size_t inlen)
419 {
420 int ret;
421 RSA_PKEY_CTX *rctx = ctx->data;
422 ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
423 rctx->pad_mode);
424 if (ret < 0)
425 return ret;
426 *outlen = ret;
427 return 1;
428 }
429
430 static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
431 unsigned char *out, size_t *outlen,
432 const unsigned char *in, size_t inlen)
433 {
434 int ret;
435 RSA_PKEY_CTX *rctx = ctx->data;
436 ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
437 rctx->pad_mode);
438 if (ret < 0)
439 return ret;
440 *outlen = ret;
441 return 1;
442 }
443
444 static int check_padding_md(const EVP_MD *md, int padding)
445 {
446 if (!md)
447 return 1;
448
449 if (padding == RSA_NO_PADDING)
450 {
451 RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
452 return 0;
453 }
454
455 if (padding == RSA_X931_PADDING)
456 {
457 if (RSA_X931_hash_id(EVP_MD_type(md)) == -1)
458 {
459 RSAerr(RSA_F_CHECK_PADDING_MD,
460 RSA_R_INVALID_X931_DIGEST);
461 return 0;
462 }
463 return 1;
464 }
465
466 return 1;
467 }
468
469
470 static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
471 {
472 RSA_PKEY_CTX *rctx = ctx->data;
473 switch (type)
474 {
475 case EVP_PKEY_CTRL_RSA_PADDING:
476 if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING))
477 {
478 if (!check_padding_md(rctx->md, p1))
479 return 0;
480 if (p1 == RSA_PKCS1_PSS_PADDING)
481 {
482 if (!(ctx->operation &
483 (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
484 goto bad_pad;
485 if (!rctx->md)
486 rctx->md = EVP_sha1();
487 }
488 if (p1 == RSA_PKCS1_OAEP_PADDING)
489 {
490 if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
491 goto bad_pad;
492 if (!rctx->md)
493 rctx->md = EVP_sha1();
494 }
495 rctx->pad_mode = p1;
496 return 1;
497 }
498 bad_pad:
499 RSAerr(RSA_F_PKEY_RSA_CTRL,
500 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
501 return -2;
502
503 case EVP_PKEY_CTRL_GET_RSA_PADDING:
504 *(int *)p2 = rctx->pad_mode;
505 return 1;
506
507 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
508 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
509 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
510 {
511 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
512 return -2;
513 }
514 if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
515 *(int *)p2 = rctx->saltlen;
516 else
517 {
518 if (p1 < -2)
519 return -2;
520 rctx->saltlen = p1;
521 }
522 return 1;
523
524 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
525 if (p1 < 256)
526 {
527 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS);
528 return -2;
529 }
530 rctx->nbits = p1;
531 return 1;
532
533 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
534 if (!p2)
535 return -2;
536 rctx->pub_exp = p2;
537 return 1;
538
539 case EVP_PKEY_CTRL_MD:
540 if (!check_padding_md(p2, rctx->pad_mode))
541 return 0;
542 rctx->md = p2;
543 return 1;
544
545 case EVP_PKEY_CTRL_RSA_MGF1_MD:
546 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
547 if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
548 {
549 RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_MGF1_MD);
550 return -2;
551 }
552 if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD)
553 {
554 if (rctx->mgf1md)
555 *(const EVP_MD **)p2 = rctx->mgf1md;
556 else
557 *(const EVP_MD **)p2 = rctx->md;
558 }
559 else
560 rctx->mgf1md = p2;
561 return 1;
562
563 case EVP_PKEY_CTRL_DIGESTINIT:
564 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
565 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
566 case EVP_PKEY_CTRL_PKCS7_SIGN:
567 return 1;
568 #ifndef OPENSSL_NO_CMS
569 case EVP_PKEY_CTRL_CMS_DECRYPT:
570 {
571 X509_ALGOR *alg = NULL;
572 ASN1_OBJECT *encalg = NULL;
573 if (p2)
574 CMS_RecipientInfo_ktri_get0_algs(p2, NULL, NULL, &alg);
575 if (alg)
576 X509_ALGOR_get0(&encalg, NULL, NULL, alg);
577 if (encalg && OBJ_obj2nid(encalg) == NID_rsaesOaep)
578 rctx->pad_mode = RSA_PKCS1_OAEP_PADDING;
579 }
580 case EVP_PKEY_CTRL_CMS_ENCRYPT:
581 case EVP_PKEY_CTRL_CMS_SIGN:
582 return 1;
583 #endif
584 case EVP_PKEY_CTRL_PEER_KEY:
585 RSAerr(RSA_F_PKEY_RSA_CTRL,
586 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
587 return -2;
588
589 default:
590 return -2;
591
592 }
593 }
594
595 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
596 const char *type, const char *value)
597 {
598 if (!value)
599 {
600 RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
601 return 0;
602 }
603 if (!strcmp(type, "rsa_padding_mode"))
604 {
605 int pm;
606 if (!strcmp(value, "pkcs1"))
607 pm = RSA_PKCS1_PADDING;
608 else if (!strcmp(value, "sslv23"))
609 pm = RSA_SSLV23_PADDING;
610 else if (!strcmp(value, "none"))
611 pm = RSA_NO_PADDING;
612 else if (!strcmp(value, "oeap"))
613 pm = RSA_PKCS1_OAEP_PADDING;
614 else if (!strcmp(value, "oaep"))
615 pm = RSA_PKCS1_OAEP_PADDING;
616 else if (!strcmp(value, "x931"))
617 pm = RSA_X931_PADDING;
618 else if (!strcmp(value, "pss"))
619 pm = RSA_PKCS1_PSS_PADDING;
620 else
621 {
622 RSAerr(RSA_F_PKEY_RSA_CTRL_STR,
623 RSA_R_UNKNOWN_PADDING_TYPE);
624 return -2;
625 }
626 return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
627 }
628
629 if (!strcmp(type, "rsa_pss_saltlen"))
630 {
631 int saltlen;
632 saltlen = atoi(value);
633 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
634 }
635
636 if (!strcmp(type, "rsa_keygen_bits"))
637 {
638 int nbits;
639 nbits = atoi(value);
640 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
641 }
642
643 if (!strcmp(type, "rsa_keygen_pubexp"))
644 {
645 int ret;
646 BIGNUM *pubexp = NULL;
647 if (!BN_asc2bn(&pubexp, value))
648 return 0;
649 ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
650 if (ret <= 0)
651 BN_free(pubexp);
652 return ret;
653 }
654
655 return -2;
656 }
657
658 static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
659 {
660 RSA *rsa = NULL;
661 RSA_PKEY_CTX *rctx = ctx->data;
662 BN_GENCB *pcb, cb;
663 int ret;
664 if (!rctx->pub_exp)
665 {
666 rctx->pub_exp = BN_new();
667 if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
668 return 0;
669 }
670 rsa = RSA_new();
671 if (!rsa)
672 return 0;
673 if (ctx->pkey_gencb)
674 {
675 pcb = &cb;
676 evp_pkey_set_cb_translate(pcb, ctx);
677 }
678 else
679 pcb = NULL;
680 ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
681 if (ret > 0)
682 EVP_PKEY_assign_RSA(pkey, rsa);
683 else
684 RSA_free(rsa);
685 return ret;
686 }
687
688 const EVP_PKEY_METHOD rsa_pkey_meth =
689 {
690 EVP_PKEY_RSA,
691 EVP_PKEY_FLAG_AUTOARGLEN,
692 pkey_rsa_init,
693 pkey_rsa_copy,
694 pkey_rsa_cleanup,
695
696 0,0,
697
698 0,
699 pkey_rsa_keygen,
700
701 0,
702 pkey_rsa_sign,
703
704 0,
705 pkey_rsa_verify,
706
707 0,
708 pkey_rsa_verifyrecover,
709
710
711 0,0,0,0,
712
713 0,
714 pkey_rsa_encrypt,
715
716 0,
717 pkey_rsa_decrypt,
718
719 0,0,
720
721 pkey_rsa_ctrl,
722 pkey_rsa_ctrl_str
723
724
725 };