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).
63 #include <openssl/objects.h>
64 #include <openssl/evp.h>
65 #ifndef OPENSSL_NO_ENGINE
66 # include <openssl/engine.h>
68 #include "internal/asn1_int.h"
69 #include "internal/evp_int.h"
71 typedef int sk_cmp_fn_type(const char *const *a
, const char *const *b
);
73 DECLARE_STACK_OF(EVP_PKEY_METHOD
)
74 STACK_OF(EVP_PKEY_METHOD
) *app_pkey_methods
= NULL
;
76 extern const EVP_PKEY_METHOD rsa_pkey_meth
, dh_pkey_meth
, dsa_pkey_meth
;
77 extern const EVP_PKEY_METHOD ec_pkey_meth
, hmac_pkey_meth
, cmac_pkey_meth
;
78 extern const EVP_PKEY_METHOD dhx_pkey_meth
;
80 static const EVP_PKEY_METHOD
*standard_methods
[] = {
81 #ifndef OPENSSL_NO_RSA
87 #ifndef OPENSSL_NO_DSA
100 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
103 static int pmeth_cmp(const EVP_PKEY_METHOD
*const *a
,
104 const EVP_PKEY_METHOD
*const *b
)
106 return ((*a
)->pkey_id
- (*b
)->pkey_id
);
109 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
112 const EVP_PKEY_METHOD
*EVP_PKEY_meth_find(int type
)
115 const EVP_PKEY_METHOD
*t
= &tmp
, **ret
;
117 if (app_pkey_methods
) {
119 idx
= sk_EVP_PKEY_METHOD_find(app_pkey_methods
, &tmp
);
121 return sk_EVP_PKEY_METHOD_value(app_pkey_methods
, idx
);
123 ret
= OBJ_bsearch_pmeth(&t
, standard_methods
,
124 sizeof(standard_methods
) /
125 sizeof(EVP_PKEY_METHOD
*));
131 static EVP_PKEY_CTX
*int_ctx_new(EVP_PKEY
*pkey
, ENGINE
*e
, int id
)
134 const EVP_PKEY_METHOD
*pmeth
;
136 if (!pkey
|| !pkey
->ameth
)
138 id
= pkey
->ameth
->pkey_id
;
140 #ifndef OPENSSL_NO_ENGINE
141 if (pkey
&& pkey
->engine
)
143 /* Try to find an ENGINE which implements this method */
145 if (!ENGINE_init(e
)) {
146 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_ENGINE_LIB
);
150 e
= ENGINE_get_pkey_meth_engine(id
);
153 * If an ENGINE handled this method look it up. Othewise use internal
158 pmeth
= ENGINE_get_pkey_meth(e
, id
);
161 pmeth
= EVP_PKEY_meth_find(id
);
164 EVPerr(EVP_F_INT_CTX_NEW
, EVP_R_UNSUPPORTED_ALGORITHM
);
168 ret
= OPENSSL_malloc(sizeof(*ret
));
170 #ifndef OPENSSL_NO_ENGINE
174 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_MALLOC_FAILURE
);
179 ret
->operation
= EVP_PKEY_OP_UNDEFINED
;
184 CRYPTO_add(&pkey
->references
, 1, CRYPTO_LOCK_EVP_PKEY
);
188 if (pmeth
->init(ret
) <= 0) {
189 EVP_PKEY_CTX_free(ret
);
197 EVP_PKEY_METHOD
*EVP_PKEY_meth_new(int id
, int flags
)
199 EVP_PKEY_METHOD
*pmeth
;
201 pmeth
= OPENSSL_malloc(sizeof(*pmeth
));
205 memset(pmeth
, 0, sizeof(*pmeth
));
208 pmeth
->flags
= flags
| EVP_PKEY_FLAG_DYNAMIC
;
213 pmeth
->paramgen_init
= 0;
215 pmeth
->keygen_init
= 0;
217 pmeth
->sign_init
= 0;
219 pmeth
->verify_init
= 0;
221 pmeth
->verify_recover_init
= 0;
222 pmeth
->verify_recover
= 0;
223 pmeth
->signctx_init
= 0;
225 pmeth
->verifyctx_init
= 0;
226 pmeth
->verifyctx
= 0;
227 pmeth
->encrypt_init
= 0;
229 pmeth
->decrypt_init
= 0;
231 pmeth
->derive_init
= 0;
239 void EVP_PKEY_meth_get0_info(int *ppkey_id
, int *pflags
,
240 const EVP_PKEY_METHOD
*meth
)
243 *ppkey_id
= meth
->pkey_id
;
245 *pflags
= meth
->flags
;
248 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD
*dst
, const EVP_PKEY_METHOD
*src
)
251 dst
->init
= src
->init
;
252 dst
->copy
= src
->copy
;
253 dst
->cleanup
= src
->cleanup
;
255 dst
->paramgen_init
= src
->paramgen_init
;
256 dst
->paramgen
= src
->paramgen
;
258 dst
->keygen_init
= src
->keygen_init
;
259 dst
->keygen
= src
->keygen
;
261 dst
->sign_init
= src
->sign_init
;
262 dst
->sign
= src
->sign
;
264 dst
->verify_init
= src
->verify_init
;
265 dst
->verify
= src
->verify
;
267 dst
->verify_recover_init
= src
->verify_recover_init
;
268 dst
->verify_recover
= src
->verify_recover
;
270 dst
->signctx_init
= src
->signctx_init
;
271 dst
->signctx
= src
->signctx
;
273 dst
->verifyctx_init
= src
->verifyctx_init
;
274 dst
->verifyctx
= src
->verifyctx
;
276 dst
->encrypt_init
= src
->encrypt_init
;
277 dst
->encrypt
= src
->encrypt
;
279 dst
->decrypt_init
= src
->decrypt_init
;
280 dst
->decrypt
= src
->decrypt
;
282 dst
->derive_init
= src
->derive_init
;
283 dst
->derive
= src
->derive
;
285 dst
->ctrl
= src
->ctrl
;
286 dst
->ctrl_str
= src
->ctrl_str
;
289 void EVP_PKEY_meth_free(EVP_PKEY_METHOD
*pmeth
)
291 if (pmeth
&& (pmeth
->flags
& EVP_PKEY_FLAG_DYNAMIC
))
295 EVP_PKEY_CTX
*EVP_PKEY_CTX_new(EVP_PKEY
*pkey
, ENGINE
*e
)
297 return int_ctx_new(pkey
, e
, -1);
300 EVP_PKEY_CTX
*EVP_PKEY_CTX_new_id(int id
, ENGINE
*e
)
302 return int_ctx_new(NULL
, e
, id
);
305 EVP_PKEY_CTX
*EVP_PKEY_CTX_dup(EVP_PKEY_CTX
*pctx
)
308 if (!pctx
->pmeth
|| !pctx
->pmeth
->copy
)
310 #ifndef OPENSSL_NO_ENGINE
311 /* Make sure it's safe to copy a pkey context using an ENGINE */
312 if (pctx
->engine
&& !ENGINE_init(pctx
->engine
)) {
313 EVPerr(EVP_F_EVP_PKEY_CTX_DUP
, ERR_R_ENGINE_LIB
);
317 rctx
= OPENSSL_malloc(sizeof(*rctx
));
321 rctx
->pmeth
= pctx
->pmeth
;
322 #ifndef OPENSSL_NO_ENGINE
323 rctx
->engine
= pctx
->engine
;
327 CRYPTO_add(&pctx
->pkey
->references
, 1, CRYPTO_LOCK_EVP_PKEY
);
329 rctx
->pkey
= pctx
->pkey
;
332 CRYPTO_add(&pctx
->peerkey
->references
, 1, CRYPTO_LOCK_EVP_PKEY
);
334 rctx
->peerkey
= pctx
->peerkey
;
337 rctx
->app_data
= NULL
;
338 rctx
->operation
= pctx
->operation
;
340 if (pctx
->pmeth
->copy(rctx
, pctx
) > 0)
343 EVP_PKEY_CTX_free(rctx
);
348 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD
*pmeth
)
350 if (app_pkey_methods
== NULL
) {
351 app_pkey_methods
= sk_EVP_PKEY_METHOD_new(pmeth_cmp
);
352 if (!app_pkey_methods
)
355 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods
, pmeth
))
357 sk_EVP_PKEY_METHOD_sort(app_pkey_methods
);
361 void EVP_PKEY_CTX_free(EVP_PKEY_CTX
*ctx
)
365 if (ctx
->pmeth
&& ctx
->pmeth
->cleanup
)
366 ctx
->pmeth
->cleanup(ctx
);
367 EVP_PKEY_free(ctx
->pkey
);
368 EVP_PKEY_free(ctx
->peerkey
);
369 #ifndef OPENSSL_NO_ENGINE
372 * The EVP_PKEY_CTX we used belongs to an ENGINE, release the
373 * functional reference we held for this reason.
375 ENGINE_finish(ctx
->engine
);
380 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX
*ctx
, int keytype
, int optype
,
381 int cmd
, int p1
, void *p2
)
384 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl
) {
385 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
388 if ((keytype
!= -1) && (ctx
->pmeth
->pkey_id
!= keytype
))
391 if (ctx
->operation
== EVP_PKEY_OP_UNDEFINED
) {
392 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_NO_OPERATION_SET
);
396 if ((optype
!= -1) && !(ctx
->operation
& optype
)) {
397 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_INVALID_OPERATION
);
401 ret
= ctx
->pmeth
->ctrl(ctx
, cmd
, p1
, p2
);
404 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
410 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX
*ctx
,
411 const char *name
, const char *value
)
413 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl_str
) {
414 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR
, EVP_R_COMMAND_NOT_SUPPORTED
);
417 if (strcmp(name
, "digest") == 0) {
419 if (value
== NULL
|| (md
= EVP_get_digestbyname(value
)) == NULL
) {
420 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR
, EVP_R_INVALID_DIGEST
);
423 return EVP_PKEY_CTX_set_signature_md(ctx
, md
);
425 return ctx
->pmeth
->ctrl_str(ctx
, name
, value
);
428 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX
*ctx
)
430 return ctx
->operation
;
433 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX
*ctx
, int *dat
, int datlen
)
435 ctx
->keygen_info
= dat
;
436 ctx
->keygen_info_count
= datlen
;
439 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX
*ctx
, void *data
)
444 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX
*ctx
)
449 EVP_PKEY
*EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX
*ctx
)
454 EVP_PKEY
*EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX
*ctx
)
459 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX
*ctx
, void *data
)
461 ctx
->app_data
= data
;
464 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX
*ctx
)
466 return ctx
->app_data
;
469 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD
*pmeth
,
470 int (*init
) (EVP_PKEY_CTX
*ctx
))
475 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD
*pmeth
,
476 int (*copy
) (EVP_PKEY_CTX
*dst
,
482 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD
*pmeth
,
483 void (*cleanup
) (EVP_PKEY_CTX
*ctx
))
485 pmeth
->cleanup
= cleanup
;
488 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD
*pmeth
,
489 int (*paramgen_init
) (EVP_PKEY_CTX
*ctx
),
490 int (*paramgen
) (EVP_PKEY_CTX
*ctx
,
493 pmeth
->paramgen_init
= paramgen_init
;
494 pmeth
->paramgen
= paramgen
;
497 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD
*pmeth
,
498 int (*keygen_init
) (EVP_PKEY_CTX
*ctx
),
499 int (*keygen
) (EVP_PKEY_CTX
*ctx
,
502 pmeth
->keygen_init
= keygen_init
;
503 pmeth
->keygen
= keygen
;
506 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD
*pmeth
,
507 int (*sign_init
) (EVP_PKEY_CTX
*ctx
),
508 int (*sign
) (EVP_PKEY_CTX
*ctx
,
509 unsigned char *sig
, size_t *siglen
,
510 const unsigned char *tbs
,
513 pmeth
->sign_init
= sign_init
;
517 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD
*pmeth
,
518 int (*verify_init
) (EVP_PKEY_CTX
*ctx
),
519 int (*verify
) (EVP_PKEY_CTX
*ctx
,
520 const unsigned char *sig
,
522 const unsigned char *tbs
,
525 pmeth
->verify_init
= verify_init
;
526 pmeth
->verify
= verify
;
529 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD
*pmeth
,
530 int (*verify_recover_init
) (EVP_PKEY_CTX
532 int (*verify_recover
) (EVP_PKEY_CTX
541 pmeth
->verify_recover_init
= verify_recover_init
;
542 pmeth
->verify_recover
= verify_recover
;
545 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD
*pmeth
,
546 int (*signctx_init
) (EVP_PKEY_CTX
*ctx
,
548 int (*signctx
) (EVP_PKEY_CTX
*ctx
,
553 pmeth
->signctx_init
= signctx_init
;
554 pmeth
->signctx
= signctx
;
557 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD
*pmeth
,
558 int (*verifyctx_init
) (EVP_PKEY_CTX
*ctx
,
560 int (*verifyctx
) (EVP_PKEY_CTX
*ctx
,
561 const unsigned char *sig
,
565 pmeth
->verifyctx_init
= verifyctx_init
;
566 pmeth
->verifyctx
= verifyctx
;
569 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD
*pmeth
,
570 int (*encrypt_init
) (EVP_PKEY_CTX
*ctx
),
571 int (*encryptfn
) (EVP_PKEY_CTX
*ctx
,
574 const unsigned char *in
,
577 pmeth
->encrypt_init
= encrypt_init
;
578 pmeth
->encrypt
= encryptfn
;
581 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD
*pmeth
,
582 int (*decrypt_init
) (EVP_PKEY_CTX
*ctx
),
583 int (*decrypt
) (EVP_PKEY_CTX
*ctx
,
586 const unsigned char *in
,
589 pmeth
->decrypt_init
= decrypt_init
;
590 pmeth
->decrypt
= decrypt
;
593 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD
*pmeth
,
594 int (*derive_init
) (EVP_PKEY_CTX
*ctx
),
595 int (*derive
) (EVP_PKEY_CTX
*ctx
,
599 pmeth
->derive_init
= derive_init
;
600 pmeth
->derive
= derive
;
603 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD
*pmeth
,
604 int (*ctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
606 int (*ctrl_str
) (EVP_PKEY_CTX
*ctx
,
611 pmeth
->ctrl_str
= ctrl_str
;