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 "internal/cryptlib.h"
63 #include <openssl/cmac.h>
64 #include <openssl/dh.h>
65 #include <openssl/dsa.h>
66 #include <openssl/evp.h>
67 #include <openssl/hmac.h>
68 #include <openssl/objects.h>
69 #include <openssl/rsa.h>
70 #ifndef OPENSSL_NO_ENGINE
71 # include <openssl/engine.h>
73 #include "internal/asn1_int.h"
74 #include "internal/evp_int.h"
76 typedef int sk_cmp_fn_type(const char *const *a
, const char *const *b
);
78 DECLARE_STACK_OF(EVP_PKEY_METHOD
)
79 static STACK_OF(EVP_PKEY_METHOD
) *app_pkey_methods
= NULL
;
81 static const EVP_PKEY_METHOD
*standard_methods
[] = {
82 #ifndef OPENSSL_NO_RSA
88 #ifndef OPENSSL_NO_DSA
101 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
104 static int pmeth_cmp(const EVP_PKEY_METHOD
*const *a
,
105 const EVP_PKEY_METHOD
*const *b
)
107 return ((*a
)->pkey_id
- (*b
)->pkey_id
);
110 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
113 const EVP_PKEY_METHOD
*EVP_PKEY_meth_find(int type
)
116 const EVP_PKEY_METHOD
*t
= &tmp
, **ret
;
118 if (app_pkey_methods
) {
120 idx
= sk_EVP_PKEY_METHOD_find(app_pkey_methods
, &tmp
);
122 return sk_EVP_PKEY_METHOD_value(app_pkey_methods
, idx
);
124 ret
= OBJ_bsearch_pmeth(&t
, standard_methods
,
125 sizeof(standard_methods
) /
126 sizeof(EVP_PKEY_METHOD
*));
132 static EVP_PKEY_CTX
*int_ctx_new(EVP_PKEY
*pkey
, ENGINE
*e
, int id
)
135 const EVP_PKEY_METHOD
*pmeth
;
137 if (!pkey
|| !pkey
->ameth
)
139 id
= pkey
->ameth
->pkey_id
;
141 #ifndef OPENSSL_NO_ENGINE
142 if (pkey
&& pkey
->engine
)
144 /* Try to find an ENGINE which implements this method */
146 if (!ENGINE_init(e
)) {
147 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_ENGINE_LIB
);
151 e
= ENGINE_get_pkey_meth_engine(id
);
154 * If an ENGINE handled this method look it up. Othewise use internal
159 pmeth
= ENGINE_get_pkey_meth(e
, id
);
162 pmeth
= EVP_PKEY_meth_find(id
);
165 EVPerr(EVP_F_INT_CTX_NEW
, EVP_R_UNSUPPORTED_ALGORITHM
);
169 ret
= OPENSSL_zalloc(sizeof(*ret
));
171 #ifndef OPENSSL_NO_ENGINE
175 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_MALLOC_FAILURE
);
180 ret
->operation
= EVP_PKEY_OP_UNDEFINED
;
183 CRYPTO_add(&pkey
->references
, 1, CRYPTO_LOCK_EVP_PKEY
);
186 if (pmeth
->init(ret
) <= 0) {
187 EVP_PKEY_CTX_free(ret
);
195 EVP_PKEY_METHOD
*EVP_PKEY_meth_new(int id
, int flags
)
197 EVP_PKEY_METHOD
*pmeth
;
199 pmeth
= OPENSSL_zalloc(sizeof(*pmeth
));
204 pmeth
->flags
= flags
| EVP_PKEY_FLAG_DYNAMIC
;
208 void EVP_PKEY_meth_get0_info(int *ppkey_id
, int *pflags
,
209 const EVP_PKEY_METHOD
*meth
)
212 *ppkey_id
= meth
->pkey_id
;
214 *pflags
= meth
->flags
;
217 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD
*dst
, const EVP_PKEY_METHOD
*src
)
220 dst
->init
= src
->init
;
221 dst
->copy
= src
->copy
;
222 dst
->cleanup
= src
->cleanup
;
224 dst
->paramgen_init
= src
->paramgen_init
;
225 dst
->paramgen
= src
->paramgen
;
227 dst
->keygen_init
= src
->keygen_init
;
228 dst
->keygen
= src
->keygen
;
230 dst
->sign_init
= src
->sign_init
;
231 dst
->sign
= src
->sign
;
233 dst
->verify_init
= src
->verify_init
;
234 dst
->verify
= src
->verify
;
236 dst
->verify_recover_init
= src
->verify_recover_init
;
237 dst
->verify_recover
= src
->verify_recover
;
239 dst
->signctx_init
= src
->signctx_init
;
240 dst
->signctx
= src
->signctx
;
242 dst
->verifyctx_init
= src
->verifyctx_init
;
243 dst
->verifyctx
= src
->verifyctx
;
245 dst
->encrypt_init
= src
->encrypt_init
;
246 dst
->encrypt
= src
->encrypt
;
248 dst
->decrypt_init
= src
->decrypt_init
;
249 dst
->decrypt
= src
->decrypt
;
251 dst
->derive_init
= src
->derive_init
;
252 dst
->derive
= src
->derive
;
254 dst
->ctrl
= src
->ctrl
;
255 dst
->ctrl_str
= src
->ctrl_str
;
258 void EVP_PKEY_meth_free(EVP_PKEY_METHOD
*pmeth
)
260 if (pmeth
&& (pmeth
->flags
& EVP_PKEY_FLAG_DYNAMIC
))
264 EVP_PKEY_CTX
*EVP_PKEY_CTX_new(EVP_PKEY
*pkey
, ENGINE
*e
)
266 return int_ctx_new(pkey
, e
, -1);
269 EVP_PKEY_CTX
*EVP_PKEY_CTX_new_id(int id
, ENGINE
*e
)
271 return int_ctx_new(NULL
, e
, id
);
274 EVP_PKEY_CTX
*EVP_PKEY_CTX_dup(EVP_PKEY_CTX
*pctx
)
277 if (!pctx
->pmeth
|| !pctx
->pmeth
->copy
)
279 #ifndef OPENSSL_NO_ENGINE
280 /* Make sure it's safe to copy a pkey context using an ENGINE */
281 if (pctx
->engine
&& !ENGINE_init(pctx
->engine
)) {
282 EVPerr(EVP_F_EVP_PKEY_CTX_DUP
, ERR_R_ENGINE_LIB
);
286 rctx
= OPENSSL_malloc(sizeof(*rctx
));
290 rctx
->pmeth
= pctx
->pmeth
;
291 #ifndef OPENSSL_NO_ENGINE
292 rctx
->engine
= pctx
->engine
;
296 CRYPTO_add(&pctx
->pkey
->references
, 1, CRYPTO_LOCK_EVP_PKEY
);
298 rctx
->pkey
= pctx
->pkey
;
301 CRYPTO_add(&pctx
->peerkey
->references
, 1, CRYPTO_LOCK_EVP_PKEY
);
303 rctx
->peerkey
= pctx
->peerkey
;
306 rctx
->app_data
= NULL
;
307 rctx
->operation
= pctx
->operation
;
309 if (pctx
->pmeth
->copy(rctx
, pctx
) > 0)
312 EVP_PKEY_CTX_free(rctx
);
317 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD
*pmeth
)
319 if (app_pkey_methods
== NULL
) {
320 app_pkey_methods
= sk_EVP_PKEY_METHOD_new(pmeth_cmp
);
321 if (!app_pkey_methods
)
324 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods
, pmeth
))
326 sk_EVP_PKEY_METHOD_sort(app_pkey_methods
);
330 void EVP_PKEY_CTX_free(EVP_PKEY_CTX
*ctx
)
334 if (ctx
->pmeth
&& ctx
->pmeth
->cleanup
)
335 ctx
->pmeth
->cleanup(ctx
);
336 EVP_PKEY_free(ctx
->pkey
);
337 EVP_PKEY_free(ctx
->peerkey
);
338 #ifndef OPENSSL_NO_ENGINE
341 * The EVP_PKEY_CTX we used belongs to an ENGINE, release the
342 * functional reference we held for this reason.
344 ENGINE_finish(ctx
->engine
);
349 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX
*ctx
, int keytype
, int optype
,
350 int cmd
, int p1
, void *p2
)
353 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl
) {
354 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
357 if ((keytype
!= -1) && (ctx
->pmeth
->pkey_id
!= keytype
))
360 if (ctx
->operation
== EVP_PKEY_OP_UNDEFINED
) {
361 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_NO_OPERATION_SET
);
365 if ((optype
!= -1) && !(ctx
->operation
& optype
)) {
366 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_INVALID_OPERATION
);
370 ret
= ctx
->pmeth
->ctrl(ctx
, cmd
, p1
, p2
);
373 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
379 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX
*ctx
,
380 const char *name
, const char *value
)
382 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl_str
) {
383 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR
, EVP_R_COMMAND_NOT_SUPPORTED
);
386 if (strcmp(name
, "digest") == 0) {
388 if (value
== NULL
|| (md
= EVP_get_digestbyname(value
)) == NULL
) {
389 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR
, EVP_R_INVALID_DIGEST
);
392 return EVP_PKEY_CTX_set_signature_md(ctx
, md
);
394 return ctx
->pmeth
->ctrl_str(ctx
, name
, value
);
397 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX
*ctx
)
399 return ctx
->operation
;
402 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX
*ctx
, int *dat
, int datlen
)
404 ctx
->keygen_info
= dat
;
405 ctx
->keygen_info_count
= datlen
;
408 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX
*ctx
, void *data
)
413 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX
*ctx
)
418 EVP_PKEY
*EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX
*ctx
)
423 EVP_PKEY
*EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX
*ctx
)
428 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX
*ctx
, void *data
)
430 ctx
->app_data
= data
;
433 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX
*ctx
)
435 return ctx
->app_data
;
438 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD
*pmeth
,
439 int (*init
) (EVP_PKEY_CTX
*ctx
))
444 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD
*pmeth
,
445 int (*copy
) (EVP_PKEY_CTX
*dst
,
451 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD
*pmeth
,
452 void (*cleanup
) (EVP_PKEY_CTX
*ctx
))
454 pmeth
->cleanup
= cleanup
;
457 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD
*pmeth
,
458 int (*paramgen_init
) (EVP_PKEY_CTX
*ctx
),
459 int (*paramgen
) (EVP_PKEY_CTX
*ctx
,
462 pmeth
->paramgen_init
= paramgen_init
;
463 pmeth
->paramgen
= paramgen
;
466 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD
*pmeth
,
467 int (*keygen_init
) (EVP_PKEY_CTX
*ctx
),
468 int (*keygen
) (EVP_PKEY_CTX
*ctx
,
471 pmeth
->keygen_init
= keygen_init
;
472 pmeth
->keygen
= keygen
;
475 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD
*pmeth
,
476 int (*sign_init
) (EVP_PKEY_CTX
*ctx
),
477 int (*sign
) (EVP_PKEY_CTX
*ctx
,
478 unsigned char *sig
, size_t *siglen
,
479 const unsigned char *tbs
,
482 pmeth
->sign_init
= sign_init
;
486 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD
*pmeth
,
487 int (*verify_init
) (EVP_PKEY_CTX
*ctx
),
488 int (*verify
) (EVP_PKEY_CTX
*ctx
,
489 const unsigned char *sig
,
491 const unsigned char *tbs
,
494 pmeth
->verify_init
= verify_init
;
495 pmeth
->verify
= verify
;
498 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD
*pmeth
,
499 int (*verify_recover_init
) (EVP_PKEY_CTX
501 int (*verify_recover
) (EVP_PKEY_CTX
510 pmeth
->verify_recover_init
= verify_recover_init
;
511 pmeth
->verify_recover
= verify_recover
;
514 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD
*pmeth
,
515 int (*signctx_init
) (EVP_PKEY_CTX
*ctx
,
517 int (*signctx
) (EVP_PKEY_CTX
*ctx
,
522 pmeth
->signctx_init
= signctx_init
;
523 pmeth
->signctx
= signctx
;
526 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD
*pmeth
,
527 int (*verifyctx_init
) (EVP_PKEY_CTX
*ctx
,
529 int (*verifyctx
) (EVP_PKEY_CTX
*ctx
,
530 const unsigned char *sig
,
534 pmeth
->verifyctx_init
= verifyctx_init
;
535 pmeth
->verifyctx
= verifyctx
;
538 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD
*pmeth
,
539 int (*encrypt_init
) (EVP_PKEY_CTX
*ctx
),
540 int (*encryptfn
) (EVP_PKEY_CTX
*ctx
,
543 const unsigned char *in
,
546 pmeth
->encrypt_init
= encrypt_init
;
547 pmeth
->encrypt
= encryptfn
;
550 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD
*pmeth
,
551 int (*decrypt_init
) (EVP_PKEY_CTX
*ctx
),
552 int (*decrypt
) (EVP_PKEY_CTX
*ctx
,
555 const unsigned char *in
,
558 pmeth
->decrypt_init
= decrypt_init
;
559 pmeth
->decrypt
= decrypt
;
562 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD
*pmeth
,
563 int (*derive_init
) (EVP_PKEY_CTX
*ctx
),
564 int (*derive
) (EVP_PKEY_CTX
*ctx
,
568 pmeth
->derive_init
= derive_init
;
569 pmeth
->derive
= derive
;
572 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD
*pmeth
,
573 int (*ctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
575 int (*ctrl_str
) (EVP_PKEY_CTX
*ctx
,
580 pmeth
->ctrl_str
= ctrl_str
;
583 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD
*pmeth
,
584 int (**pinit
) (EVP_PKEY_CTX
*ctx
))
586 *pinit
= pmeth
->init
;
589 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD
*pmeth
,
590 int (**pcopy
) (EVP_PKEY_CTX
*dst
,
593 *pcopy
= pmeth
->copy
;
596 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD
*pmeth
,
597 void (**pcleanup
) (EVP_PKEY_CTX
*ctx
))
599 *pcleanup
= pmeth
->cleanup
;
602 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD
*pmeth
,
603 int (**pparamgen_init
) (EVP_PKEY_CTX
*ctx
),
604 int (**pparamgen
) (EVP_PKEY_CTX
*ctx
,
608 *pparamgen_init
= pmeth
->paramgen_init
;
610 *pparamgen
= pmeth
->paramgen
;
613 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD
*pmeth
,
614 int (**pkeygen_init
) (EVP_PKEY_CTX
*ctx
),
615 int (**pkeygen
) (EVP_PKEY_CTX
*ctx
,
619 *pkeygen_init
= pmeth
->keygen_init
;
621 *pkeygen
= pmeth
->keygen
;
624 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD
*pmeth
,
625 int (**psign_init
) (EVP_PKEY_CTX
*ctx
),
626 int (**psign
) (EVP_PKEY_CTX
*ctx
,
627 unsigned char *sig
, size_t *siglen
,
628 const unsigned char *tbs
,
632 *psign_init
= pmeth
->sign_init
;
634 *psign
= pmeth
->sign
;
637 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD
*pmeth
,
638 int (**pverify_init
) (EVP_PKEY_CTX
*ctx
),
639 int (**pverify
) (EVP_PKEY_CTX
*ctx
,
640 const unsigned char *sig
,
642 const unsigned char *tbs
,
646 *pverify_init
= pmeth
->verify_init
;
648 *pverify
= pmeth
->verify
;
651 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD
*pmeth
,
652 int (**pverify_recover_init
) (EVP_PKEY_CTX
654 int (**pverify_recover
) (EVP_PKEY_CTX
663 if (pverify_recover_init
)
664 *pverify_recover_init
= pmeth
->verify_recover_init
;
666 *pverify_recover
= pmeth
->verify_recover
;
669 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD
*pmeth
,
670 int (**psignctx_init
) (EVP_PKEY_CTX
*ctx
,
672 int (**psignctx
) (EVP_PKEY_CTX
*ctx
,
678 *psignctx_init
= pmeth
->signctx_init
;
680 *psignctx
= pmeth
->signctx
;
683 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD
*pmeth
,
684 int (**pverifyctx_init
) (EVP_PKEY_CTX
*ctx
,
686 int (**pverifyctx
) (EVP_PKEY_CTX
*ctx
,
687 const unsigned char *sig
,
692 *pverifyctx_init
= pmeth
->verifyctx_init
;
694 *pverifyctx
= pmeth
->verifyctx
;
697 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD
*pmeth
,
698 int (**pencrypt_init
) (EVP_PKEY_CTX
*ctx
),
699 int (**pencryptfn
) (EVP_PKEY_CTX
*ctx
,
702 const unsigned char *in
,
706 *pencrypt_init
= pmeth
->encrypt_init
;
708 *pencryptfn
= pmeth
->encrypt
;
711 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD
*pmeth
,
712 int (**pdecrypt_init
) (EVP_PKEY_CTX
*ctx
),
713 int (**pdecrypt
) (EVP_PKEY_CTX
*ctx
,
716 const unsigned char *in
,
720 *pdecrypt_init
= pmeth
->decrypt_init
;
722 *pdecrypt
= pmeth
->decrypt
;
725 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD
*pmeth
,
726 int (**pderive_init
) (EVP_PKEY_CTX
*ctx
),
727 int (**pderive
) (EVP_PKEY_CTX
*ctx
,
732 *pderive_init
= pmeth
->derive_init
;
734 *pderive
= pmeth
->derive
;
737 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD
*pmeth
,
738 int (**pctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
740 int (**pctrl_str
) (EVP_PKEY_CTX
*ctx
,
745 *pctrl
= pmeth
->ctrl
;
747 *pctrl_str
= pmeth
->ctrl_str
;