2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
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 "internal/cryptlib.h"
62 #include <openssl/engine.h>
63 #include <openssl/evp.h>
64 #include <openssl/x509v3.h>
65 #include "internal/asn1_int.h"
66 #include "internal/evp_int.h"
67 #include "internal/numbers.h"
69 typedef int sk_cmp_fn_type(const char *const *a
, const char *const *b
);
71 static STACK_OF(EVP_PKEY_METHOD
) *app_pkey_methods
= NULL
;
73 static const EVP_PKEY_METHOD
*standard_methods
[] = {
74 #ifndef OPENSSL_NO_RSA
80 #ifndef OPENSSL_NO_DSA
87 #ifndef OPENSSL_NO_CMAC
97 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
100 static int pmeth_cmp(const EVP_PKEY_METHOD
*const *a
,
101 const EVP_PKEY_METHOD
*const *b
)
103 return ((*a
)->pkey_id
- (*b
)->pkey_id
);
106 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
109 const EVP_PKEY_METHOD
*EVP_PKEY_meth_find(int type
)
112 const EVP_PKEY_METHOD
*t
= &tmp
, **ret
;
114 if (app_pkey_methods
) {
116 idx
= sk_EVP_PKEY_METHOD_find(app_pkey_methods
, &tmp
);
118 return sk_EVP_PKEY_METHOD_value(app_pkey_methods
, idx
);
120 ret
= OBJ_bsearch_pmeth(&t
, standard_methods
,
121 sizeof(standard_methods
) /
122 sizeof(EVP_PKEY_METHOD
*));
128 static EVP_PKEY_CTX
*int_ctx_new(EVP_PKEY
*pkey
, ENGINE
*e
, int id
)
131 const EVP_PKEY_METHOD
*pmeth
;
133 if (!pkey
|| !pkey
->ameth
)
135 id
= pkey
->ameth
->pkey_id
;
137 #ifndef OPENSSL_NO_ENGINE
138 if (pkey
&& pkey
->engine
)
140 /* Try to find an ENGINE which implements this method */
142 if (!ENGINE_init(e
)) {
143 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_ENGINE_LIB
);
147 e
= ENGINE_get_pkey_meth_engine(id
);
150 * If an ENGINE handled this method look it up. Otherwise use internal
155 pmeth
= ENGINE_get_pkey_meth(e
, id
);
158 pmeth
= EVP_PKEY_meth_find(id
);
161 EVPerr(EVP_F_INT_CTX_NEW
, EVP_R_UNSUPPORTED_ALGORITHM
);
165 ret
= OPENSSL_zalloc(sizeof(*ret
));
167 #ifndef OPENSSL_NO_ENGINE
170 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_MALLOC_FAILURE
);
175 ret
->operation
= EVP_PKEY_OP_UNDEFINED
;
178 EVP_PKEY_up_ref(pkey
);
181 if (pmeth
->init(ret
) <= 0) {
182 EVP_PKEY_CTX_free(ret
);
190 EVP_PKEY_METHOD
*EVP_PKEY_meth_new(int id
, int flags
)
192 EVP_PKEY_METHOD
*pmeth
;
194 pmeth
= OPENSSL_zalloc(sizeof(*pmeth
));
199 pmeth
->flags
= flags
| EVP_PKEY_FLAG_DYNAMIC
;
203 void EVP_PKEY_meth_get0_info(int *ppkey_id
, int *pflags
,
204 const EVP_PKEY_METHOD
*meth
)
207 *ppkey_id
= meth
->pkey_id
;
209 *pflags
= meth
->flags
;
212 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD
*dst
, const EVP_PKEY_METHOD
*src
)
215 dst
->init
= src
->init
;
216 dst
->copy
= src
->copy
;
217 dst
->cleanup
= src
->cleanup
;
219 dst
->paramgen_init
= src
->paramgen_init
;
220 dst
->paramgen
= src
->paramgen
;
222 dst
->keygen_init
= src
->keygen_init
;
223 dst
->keygen
= src
->keygen
;
225 dst
->sign_init
= src
->sign_init
;
226 dst
->sign
= src
->sign
;
228 dst
->verify_init
= src
->verify_init
;
229 dst
->verify
= src
->verify
;
231 dst
->verify_recover_init
= src
->verify_recover_init
;
232 dst
->verify_recover
= src
->verify_recover
;
234 dst
->signctx_init
= src
->signctx_init
;
235 dst
->signctx
= src
->signctx
;
237 dst
->verifyctx_init
= src
->verifyctx_init
;
238 dst
->verifyctx
= src
->verifyctx
;
240 dst
->encrypt_init
= src
->encrypt_init
;
241 dst
->encrypt
= src
->encrypt
;
243 dst
->decrypt_init
= src
->decrypt_init
;
244 dst
->decrypt
= src
->decrypt
;
246 dst
->derive_init
= src
->derive_init
;
247 dst
->derive
= src
->derive
;
249 dst
->ctrl
= src
->ctrl
;
250 dst
->ctrl_str
= src
->ctrl_str
;
253 void EVP_PKEY_meth_free(EVP_PKEY_METHOD
*pmeth
)
255 if (pmeth
&& (pmeth
->flags
& EVP_PKEY_FLAG_DYNAMIC
))
259 EVP_PKEY_CTX
*EVP_PKEY_CTX_new(EVP_PKEY
*pkey
, ENGINE
*e
)
261 return int_ctx_new(pkey
, e
, -1);
264 EVP_PKEY_CTX
*EVP_PKEY_CTX_new_id(int id
, ENGINE
*e
)
266 return int_ctx_new(NULL
, e
, id
);
269 EVP_PKEY_CTX
*EVP_PKEY_CTX_dup(EVP_PKEY_CTX
*pctx
)
272 if (!pctx
->pmeth
|| !pctx
->pmeth
->copy
)
274 #ifndef OPENSSL_NO_ENGINE
275 /* Make sure it's safe to copy a pkey context using an ENGINE */
276 if (pctx
->engine
&& !ENGINE_init(pctx
->engine
)) {
277 EVPerr(EVP_F_EVP_PKEY_CTX_DUP
, ERR_R_ENGINE_LIB
);
281 rctx
= OPENSSL_malloc(sizeof(*rctx
));
285 rctx
->pmeth
= pctx
->pmeth
;
286 #ifndef OPENSSL_NO_ENGINE
287 rctx
->engine
= pctx
->engine
;
291 EVP_PKEY_up_ref(pctx
->pkey
);
293 rctx
->pkey
= pctx
->pkey
;
296 EVP_PKEY_up_ref(pctx
->peerkey
);
298 rctx
->peerkey
= pctx
->peerkey
;
301 rctx
->app_data
= NULL
;
302 rctx
->operation
= pctx
->operation
;
304 if (pctx
->pmeth
->copy(rctx
, pctx
) > 0)
307 EVP_PKEY_CTX_free(rctx
);
312 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD
*pmeth
)
314 if (app_pkey_methods
== NULL
) {
315 app_pkey_methods
= sk_EVP_PKEY_METHOD_new(pmeth_cmp
);
316 if (app_pkey_methods
== NULL
)
319 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods
, pmeth
))
321 sk_EVP_PKEY_METHOD_sort(app_pkey_methods
);
325 void EVP_PKEY_CTX_free(EVP_PKEY_CTX
*ctx
)
329 if (ctx
->pmeth
&& ctx
->pmeth
->cleanup
)
330 ctx
->pmeth
->cleanup(ctx
);
331 EVP_PKEY_free(ctx
->pkey
);
332 EVP_PKEY_free(ctx
->peerkey
);
333 #ifndef OPENSSL_NO_ENGINE
334 ENGINE_finish(ctx
->engine
);
339 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX
*ctx
, int keytype
, int optype
,
340 int cmd
, int p1
, void *p2
)
343 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl
) {
344 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
347 if ((keytype
!= -1) && (ctx
->pmeth
->pkey_id
!= keytype
))
350 if (ctx
->operation
== EVP_PKEY_OP_UNDEFINED
) {
351 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_NO_OPERATION_SET
);
355 if ((optype
!= -1) && !(ctx
->operation
& optype
)) {
356 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_INVALID_OPERATION
);
360 ret
= ctx
->pmeth
->ctrl(ctx
, cmd
, p1
, p2
);
363 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
369 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX
*ctx
,
370 const char *name
, const char *value
)
372 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl_str
) {
373 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR
, EVP_R_COMMAND_NOT_SUPPORTED
);
376 if (strcmp(name
, "digest") == 0) {
378 if (value
== NULL
|| (md
= EVP_get_digestbyname(value
)) == NULL
) {
379 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR
, EVP_R_INVALID_DIGEST
);
382 return EVP_PKEY_CTX_set_signature_md(ctx
, md
);
384 return ctx
->pmeth
->ctrl_str(ctx
, name
, value
);
387 /* Utility functions to send a string of hex string to a ctrl */
389 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX
*ctx
, int cmd
, const char *str
)
396 return ctx
->pmeth
->ctrl(ctx
, cmd
, len
, (void *)str
);
399 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX
*ctx
, int cmd
, const char *hex
)
405 bin
= string_to_hex(hex
, &binlen
);
408 if (binlen
<= INT_MAX
)
409 rv
= ctx
->pmeth
->ctrl(ctx
, cmd
, binlen
, bin
);
414 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX
*ctx
)
416 return ctx
->operation
;
419 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX
*ctx
, int *dat
, int datlen
)
421 ctx
->keygen_info
= dat
;
422 ctx
->keygen_info_count
= datlen
;
425 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX
*ctx
, void *data
)
430 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX
*ctx
)
435 EVP_PKEY
*EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX
*ctx
)
440 EVP_PKEY
*EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX
*ctx
)
445 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX
*ctx
, void *data
)
447 ctx
->app_data
= data
;
450 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX
*ctx
)
452 return ctx
->app_data
;
455 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD
*pmeth
,
456 int (*init
) (EVP_PKEY_CTX
*ctx
))
461 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD
*pmeth
,
462 int (*copy
) (EVP_PKEY_CTX
*dst
,
468 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD
*pmeth
,
469 void (*cleanup
) (EVP_PKEY_CTX
*ctx
))
471 pmeth
->cleanup
= cleanup
;
474 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD
*pmeth
,
475 int (*paramgen_init
) (EVP_PKEY_CTX
*ctx
),
476 int (*paramgen
) (EVP_PKEY_CTX
*ctx
,
479 pmeth
->paramgen_init
= paramgen_init
;
480 pmeth
->paramgen
= paramgen
;
483 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD
*pmeth
,
484 int (*keygen_init
) (EVP_PKEY_CTX
*ctx
),
485 int (*keygen
) (EVP_PKEY_CTX
*ctx
,
488 pmeth
->keygen_init
= keygen_init
;
489 pmeth
->keygen
= keygen
;
492 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD
*pmeth
,
493 int (*sign_init
) (EVP_PKEY_CTX
*ctx
),
494 int (*sign
) (EVP_PKEY_CTX
*ctx
,
495 unsigned char *sig
, size_t *siglen
,
496 const unsigned char *tbs
,
499 pmeth
->sign_init
= sign_init
;
503 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD
*pmeth
,
504 int (*verify_init
) (EVP_PKEY_CTX
*ctx
),
505 int (*verify
) (EVP_PKEY_CTX
*ctx
,
506 const unsigned char *sig
,
508 const unsigned char *tbs
,
511 pmeth
->verify_init
= verify_init
;
512 pmeth
->verify
= verify
;
515 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD
*pmeth
,
516 int (*verify_recover_init
) (EVP_PKEY_CTX
518 int (*verify_recover
) (EVP_PKEY_CTX
527 pmeth
->verify_recover_init
= verify_recover_init
;
528 pmeth
->verify_recover
= verify_recover
;
531 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD
*pmeth
,
532 int (*signctx_init
) (EVP_PKEY_CTX
*ctx
,
534 int (*signctx
) (EVP_PKEY_CTX
*ctx
,
539 pmeth
->signctx_init
= signctx_init
;
540 pmeth
->signctx
= signctx
;
543 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD
*pmeth
,
544 int (*verifyctx_init
) (EVP_PKEY_CTX
*ctx
,
546 int (*verifyctx
) (EVP_PKEY_CTX
*ctx
,
547 const unsigned char *sig
,
551 pmeth
->verifyctx_init
= verifyctx_init
;
552 pmeth
->verifyctx
= verifyctx
;
555 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD
*pmeth
,
556 int (*encrypt_init
) (EVP_PKEY_CTX
*ctx
),
557 int (*encryptfn
) (EVP_PKEY_CTX
*ctx
,
560 const unsigned char *in
,
563 pmeth
->encrypt_init
= encrypt_init
;
564 pmeth
->encrypt
= encryptfn
;
567 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD
*pmeth
,
568 int (*decrypt_init
) (EVP_PKEY_CTX
*ctx
),
569 int (*decrypt
) (EVP_PKEY_CTX
*ctx
,
572 const unsigned char *in
,
575 pmeth
->decrypt_init
= decrypt_init
;
576 pmeth
->decrypt
= decrypt
;
579 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD
*pmeth
,
580 int (*derive_init
) (EVP_PKEY_CTX
*ctx
),
581 int (*derive
) (EVP_PKEY_CTX
*ctx
,
585 pmeth
->derive_init
= derive_init
;
586 pmeth
->derive
= derive
;
589 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD
*pmeth
,
590 int (*ctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
592 int (*ctrl_str
) (EVP_PKEY_CTX
*ctx
,
597 pmeth
->ctrl_str
= ctrl_str
;
600 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD
*pmeth
,
601 int (**pinit
) (EVP_PKEY_CTX
*ctx
))
603 *pinit
= pmeth
->init
;
606 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD
*pmeth
,
607 int (**pcopy
) (EVP_PKEY_CTX
*dst
,
610 *pcopy
= pmeth
->copy
;
613 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD
*pmeth
,
614 void (**pcleanup
) (EVP_PKEY_CTX
*ctx
))
616 *pcleanup
= pmeth
->cleanup
;
619 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD
*pmeth
,
620 int (**pparamgen_init
) (EVP_PKEY_CTX
*ctx
),
621 int (**pparamgen
) (EVP_PKEY_CTX
*ctx
,
625 *pparamgen_init
= pmeth
->paramgen_init
;
627 *pparamgen
= pmeth
->paramgen
;
630 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD
*pmeth
,
631 int (**pkeygen_init
) (EVP_PKEY_CTX
*ctx
),
632 int (**pkeygen
) (EVP_PKEY_CTX
*ctx
,
636 *pkeygen_init
= pmeth
->keygen_init
;
638 *pkeygen
= pmeth
->keygen
;
641 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD
*pmeth
,
642 int (**psign_init
) (EVP_PKEY_CTX
*ctx
),
643 int (**psign
) (EVP_PKEY_CTX
*ctx
,
644 unsigned char *sig
, size_t *siglen
,
645 const unsigned char *tbs
,
649 *psign_init
= pmeth
->sign_init
;
651 *psign
= pmeth
->sign
;
654 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD
*pmeth
,
655 int (**pverify_init
) (EVP_PKEY_CTX
*ctx
),
656 int (**pverify
) (EVP_PKEY_CTX
*ctx
,
657 const unsigned char *sig
,
659 const unsigned char *tbs
,
663 *pverify_init
= pmeth
->verify_init
;
665 *pverify
= pmeth
->verify
;
668 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD
*pmeth
,
669 int (**pverify_recover_init
) (EVP_PKEY_CTX
671 int (**pverify_recover
) (EVP_PKEY_CTX
680 if (pverify_recover_init
)
681 *pverify_recover_init
= pmeth
->verify_recover_init
;
683 *pverify_recover
= pmeth
->verify_recover
;
686 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD
*pmeth
,
687 int (**psignctx_init
) (EVP_PKEY_CTX
*ctx
,
689 int (**psignctx
) (EVP_PKEY_CTX
*ctx
,
695 *psignctx_init
= pmeth
->signctx_init
;
697 *psignctx
= pmeth
->signctx
;
700 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD
*pmeth
,
701 int (**pverifyctx_init
) (EVP_PKEY_CTX
*ctx
,
703 int (**pverifyctx
) (EVP_PKEY_CTX
*ctx
,
704 const unsigned char *sig
,
709 *pverifyctx_init
= pmeth
->verifyctx_init
;
711 *pverifyctx
= pmeth
->verifyctx
;
714 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD
*pmeth
,
715 int (**pencrypt_init
) (EVP_PKEY_CTX
*ctx
),
716 int (**pencryptfn
) (EVP_PKEY_CTX
*ctx
,
719 const unsigned char *in
,
723 *pencrypt_init
= pmeth
->encrypt_init
;
725 *pencryptfn
= pmeth
->encrypt
;
728 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD
*pmeth
,
729 int (**pdecrypt_init
) (EVP_PKEY_CTX
*ctx
),
730 int (**pdecrypt
) (EVP_PKEY_CTX
*ctx
,
733 const unsigned char *in
,
737 *pdecrypt_init
= pmeth
->decrypt_init
;
739 *pdecrypt
= pmeth
->decrypt
;
742 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD
*pmeth
,
743 int (**pderive_init
) (EVP_PKEY_CTX
*ctx
),
744 int (**pderive
) (EVP_PKEY_CTX
*ctx
,
749 *pderive_init
= pmeth
->derive_init
;
751 *pderive
= pmeth
->derive
;
754 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD
*pmeth
,
755 int (**pctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
757 int (**pctrl_str
) (EVP_PKEY_CTX
*ctx
,
762 *pctrl
= pmeth
->ctrl
;
764 *pctrl_str
= pmeth
->ctrl_str
;