2 * Copyright 2006-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
12 #include "internal/cryptlib.h"
13 #include <openssl/engine.h>
14 #include <openssl/evp.h>
15 #include <openssl/x509v3.h>
16 #include "internal/asn1_int.h"
17 #include "internal/evp_int.h"
18 #include "internal/numbers.h"
20 typedef int sk_cmp_fn_type(const char *const *a
, const char *const *b
);
22 static STACK_OF(EVP_PKEY_METHOD
) *app_pkey_methods
= NULL
;
24 static const EVP_PKEY_METHOD
*standard_methods
[] = {
25 #ifndef OPENSSL_NO_RSA
31 #ifndef OPENSSL_NO_DSA
38 #ifndef OPENSSL_NO_CMAC
41 #ifndef OPENSSL_NO_RSA
52 #ifndef OPENSSL_NO_POLY1305
55 #ifndef OPENSSL_NO_SIPHASH
60 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
63 static int pmeth_cmp(const EVP_PKEY_METHOD
*const *a
,
64 const EVP_PKEY_METHOD
*const *b
)
66 return ((*a
)->pkey_id
- (*b
)->pkey_id
);
69 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
72 const EVP_PKEY_METHOD
*EVP_PKEY_meth_find(int type
)
75 const EVP_PKEY_METHOD
*t
= &tmp
, **ret
;
77 if (app_pkey_methods
) {
79 idx
= sk_EVP_PKEY_METHOD_find(app_pkey_methods
, &tmp
);
81 return sk_EVP_PKEY_METHOD_value(app_pkey_methods
, idx
);
83 ret
= OBJ_bsearch_pmeth(&t
, standard_methods
,
84 sizeof(standard_methods
) /
85 sizeof(EVP_PKEY_METHOD
*));
91 static EVP_PKEY_CTX
*int_ctx_new(EVP_PKEY
*pkey
, ENGINE
*e
, int id
)
94 const EVP_PKEY_METHOD
*pmeth
;
96 if (!pkey
|| !pkey
->ameth
)
98 id
= pkey
->ameth
->pkey_id
;
100 #ifndef OPENSSL_NO_ENGINE
101 if (pkey
&& pkey
->engine
)
103 /* Try to find an ENGINE which implements this method */
105 if (!ENGINE_init(e
)) {
106 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_ENGINE_LIB
);
110 e
= ENGINE_get_pkey_meth_engine(id
);
113 * If an ENGINE handled this method look it up. Otherwise use internal
118 pmeth
= ENGINE_get_pkey_meth(e
, id
);
121 pmeth
= EVP_PKEY_meth_find(id
);
124 EVPerr(EVP_F_INT_CTX_NEW
, EVP_R_UNSUPPORTED_ALGORITHM
);
128 ret
= OPENSSL_zalloc(sizeof(*ret
));
130 #ifndef OPENSSL_NO_ENGINE
133 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_MALLOC_FAILURE
);
138 ret
->operation
= EVP_PKEY_OP_UNDEFINED
;
141 EVP_PKEY_up_ref(pkey
);
144 if (pmeth
->init(ret
) <= 0) {
145 EVP_PKEY_CTX_free(ret
);
153 EVP_PKEY_METHOD
*EVP_PKEY_meth_new(int id
, int flags
)
155 EVP_PKEY_METHOD
*pmeth
;
157 pmeth
= OPENSSL_zalloc(sizeof(*pmeth
));
162 pmeth
->flags
= flags
| EVP_PKEY_FLAG_DYNAMIC
;
166 void EVP_PKEY_meth_get0_info(int *ppkey_id
, int *pflags
,
167 const EVP_PKEY_METHOD
*meth
)
170 *ppkey_id
= meth
->pkey_id
;
172 *pflags
= meth
->flags
;
175 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD
*dst
, const EVP_PKEY_METHOD
*src
)
178 dst
->init
= src
->init
;
179 dst
->copy
= src
->copy
;
180 dst
->cleanup
= src
->cleanup
;
182 dst
->paramgen_init
= src
->paramgen_init
;
183 dst
->paramgen
= src
->paramgen
;
185 dst
->keygen_init
= src
->keygen_init
;
186 dst
->keygen
= src
->keygen
;
188 dst
->sign_init
= src
->sign_init
;
189 dst
->sign
= src
->sign
;
191 dst
->verify_init
= src
->verify_init
;
192 dst
->verify
= src
->verify
;
194 dst
->verify_recover_init
= src
->verify_recover_init
;
195 dst
->verify_recover
= src
->verify_recover
;
197 dst
->signctx_init
= src
->signctx_init
;
198 dst
->signctx
= src
->signctx
;
200 dst
->verifyctx_init
= src
->verifyctx_init
;
201 dst
->verifyctx
= src
->verifyctx
;
203 dst
->encrypt_init
= src
->encrypt_init
;
204 dst
->encrypt
= src
->encrypt
;
206 dst
->decrypt_init
= src
->decrypt_init
;
207 dst
->decrypt
= src
->decrypt
;
209 dst
->derive_init
= src
->derive_init
;
210 dst
->derive
= src
->derive
;
212 dst
->ctrl
= src
->ctrl
;
213 dst
->ctrl_str
= src
->ctrl_str
;
216 void EVP_PKEY_meth_free(EVP_PKEY_METHOD
*pmeth
)
218 if (pmeth
&& (pmeth
->flags
& EVP_PKEY_FLAG_DYNAMIC
))
222 EVP_PKEY_CTX
*EVP_PKEY_CTX_new(EVP_PKEY
*pkey
, ENGINE
*e
)
224 return int_ctx_new(pkey
, e
, -1);
227 EVP_PKEY_CTX
*EVP_PKEY_CTX_new_id(int id
, ENGINE
*e
)
229 return int_ctx_new(NULL
, e
, id
);
232 EVP_PKEY_CTX
*EVP_PKEY_CTX_dup(EVP_PKEY_CTX
*pctx
)
235 if (!pctx
->pmeth
|| !pctx
->pmeth
->copy
)
237 #ifndef OPENSSL_NO_ENGINE
238 /* Make sure it's safe to copy a pkey context using an ENGINE */
239 if (pctx
->engine
&& !ENGINE_init(pctx
->engine
)) {
240 EVPerr(EVP_F_EVP_PKEY_CTX_DUP
, ERR_R_ENGINE_LIB
);
244 rctx
= OPENSSL_malloc(sizeof(*rctx
));
248 rctx
->pmeth
= pctx
->pmeth
;
249 #ifndef OPENSSL_NO_ENGINE
250 rctx
->engine
= pctx
->engine
;
254 EVP_PKEY_up_ref(pctx
->pkey
);
256 rctx
->pkey
= pctx
->pkey
;
259 EVP_PKEY_up_ref(pctx
->peerkey
);
261 rctx
->peerkey
= pctx
->peerkey
;
264 rctx
->app_data
= NULL
;
265 rctx
->operation
= pctx
->operation
;
267 if (pctx
->pmeth
->copy(rctx
, pctx
) > 0)
270 EVP_PKEY_CTX_free(rctx
);
275 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD
*pmeth
)
277 if (app_pkey_methods
== NULL
) {
278 app_pkey_methods
= sk_EVP_PKEY_METHOD_new(pmeth_cmp
);
279 if (app_pkey_methods
== NULL
)
282 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods
, pmeth
))
284 sk_EVP_PKEY_METHOD_sort(app_pkey_methods
);
288 void EVP_PKEY_CTX_free(EVP_PKEY_CTX
*ctx
)
292 if (ctx
->pmeth
&& ctx
->pmeth
->cleanup
)
293 ctx
->pmeth
->cleanup(ctx
);
294 EVP_PKEY_free(ctx
->pkey
);
295 EVP_PKEY_free(ctx
->peerkey
);
296 #ifndef OPENSSL_NO_ENGINE
297 ENGINE_finish(ctx
->engine
);
302 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX
*ctx
, int keytype
, int optype
,
303 int cmd
, int p1
, void *p2
)
306 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl
) {
307 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
310 if ((keytype
!= -1) && (ctx
->pmeth
->pkey_id
!= keytype
))
313 if (ctx
->operation
== EVP_PKEY_OP_UNDEFINED
) {
314 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_NO_OPERATION_SET
);
318 if ((optype
!= -1) && !(ctx
->operation
& optype
)) {
319 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_INVALID_OPERATION
);
323 ret
= ctx
->pmeth
->ctrl(ctx
, cmd
, p1
, p2
);
326 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
332 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX
*ctx
,
333 const char *name
, const char *value
)
335 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl_str
) {
336 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR
, EVP_R_COMMAND_NOT_SUPPORTED
);
339 if (strcmp(name
, "digest") == 0)
340 return EVP_PKEY_CTX_md(ctx
, EVP_PKEY_OP_TYPE_SIG
, EVP_PKEY_CTRL_MD
,
342 return ctx
->pmeth
->ctrl_str(ctx
, name
, value
);
345 /* Utility functions to send a string of hex string to a ctrl */
347 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX
*ctx
, int cmd
, const char *str
)
354 return ctx
->pmeth
->ctrl(ctx
, cmd
, len
, (void *)str
);
357 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX
*ctx
, int cmd
, const char *hex
)
363 bin
= OPENSSL_hexstr2buf(hex
, &binlen
);
366 if (binlen
<= INT_MAX
)
367 rv
= ctx
->pmeth
->ctrl(ctx
, cmd
, binlen
, bin
);
372 /* Pass a message digest to a ctrl */
373 int EVP_PKEY_CTX_md(EVP_PKEY_CTX
*ctx
, int optype
, int cmd
, const char *md
)
377 if (md
== NULL
|| (m
= EVP_get_digestbyname(md
)) == NULL
) {
378 EVPerr(EVP_F_EVP_PKEY_CTX_MD
, EVP_R_INVALID_DIGEST
);
381 return EVP_PKEY_CTX_ctrl(ctx
, -1, optype
, cmd
, 0, (void *)m
);
384 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX
*ctx
)
386 return ctx
->operation
;
389 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX
*ctx
, int *dat
, int datlen
)
391 ctx
->keygen_info
= dat
;
392 ctx
->keygen_info_count
= datlen
;
395 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX
*ctx
, void *data
)
400 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX
*ctx
)
405 EVP_PKEY
*EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX
*ctx
)
410 EVP_PKEY
*EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX
*ctx
)
415 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX
*ctx
, void *data
)
417 ctx
->app_data
= data
;
420 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX
*ctx
)
422 return ctx
->app_data
;
425 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD
*pmeth
,
426 int (*init
) (EVP_PKEY_CTX
*ctx
))
431 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD
*pmeth
,
432 int (*copy
) (EVP_PKEY_CTX
*dst
,
438 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD
*pmeth
,
439 void (*cleanup
) (EVP_PKEY_CTX
*ctx
))
441 pmeth
->cleanup
= cleanup
;
444 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD
*pmeth
,
445 int (*paramgen_init
) (EVP_PKEY_CTX
*ctx
),
446 int (*paramgen
) (EVP_PKEY_CTX
*ctx
,
449 pmeth
->paramgen_init
= paramgen_init
;
450 pmeth
->paramgen
= paramgen
;
453 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD
*pmeth
,
454 int (*keygen_init
) (EVP_PKEY_CTX
*ctx
),
455 int (*keygen
) (EVP_PKEY_CTX
*ctx
,
458 pmeth
->keygen_init
= keygen_init
;
459 pmeth
->keygen
= keygen
;
462 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD
*pmeth
,
463 int (*sign_init
) (EVP_PKEY_CTX
*ctx
),
464 int (*sign
) (EVP_PKEY_CTX
*ctx
,
465 unsigned char *sig
, size_t *siglen
,
466 const unsigned char *tbs
,
469 pmeth
->sign_init
= sign_init
;
473 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD
*pmeth
,
474 int (*verify_init
) (EVP_PKEY_CTX
*ctx
),
475 int (*verify
) (EVP_PKEY_CTX
*ctx
,
476 const unsigned char *sig
,
478 const unsigned char *tbs
,
481 pmeth
->verify_init
= verify_init
;
482 pmeth
->verify
= verify
;
485 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD
*pmeth
,
486 int (*verify_recover_init
) (EVP_PKEY_CTX
488 int (*verify_recover
) (EVP_PKEY_CTX
497 pmeth
->verify_recover_init
= verify_recover_init
;
498 pmeth
->verify_recover
= verify_recover
;
501 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD
*pmeth
,
502 int (*signctx_init
) (EVP_PKEY_CTX
*ctx
,
504 int (*signctx
) (EVP_PKEY_CTX
*ctx
,
509 pmeth
->signctx_init
= signctx_init
;
510 pmeth
->signctx
= signctx
;
513 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD
*pmeth
,
514 int (*verifyctx_init
) (EVP_PKEY_CTX
*ctx
,
516 int (*verifyctx
) (EVP_PKEY_CTX
*ctx
,
517 const unsigned char *sig
,
521 pmeth
->verifyctx_init
= verifyctx_init
;
522 pmeth
->verifyctx
= verifyctx
;
525 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD
*pmeth
,
526 int (*encrypt_init
) (EVP_PKEY_CTX
*ctx
),
527 int (*encryptfn
) (EVP_PKEY_CTX
*ctx
,
530 const unsigned char *in
,
533 pmeth
->encrypt_init
= encrypt_init
;
534 pmeth
->encrypt
= encryptfn
;
537 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD
*pmeth
,
538 int (*decrypt_init
) (EVP_PKEY_CTX
*ctx
),
539 int (*decrypt
) (EVP_PKEY_CTX
*ctx
,
542 const unsigned char *in
,
545 pmeth
->decrypt_init
= decrypt_init
;
546 pmeth
->decrypt
= decrypt
;
549 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD
*pmeth
,
550 int (*derive_init
) (EVP_PKEY_CTX
*ctx
),
551 int (*derive
) (EVP_PKEY_CTX
*ctx
,
555 pmeth
->derive_init
= derive_init
;
556 pmeth
->derive
= derive
;
559 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD
*pmeth
,
560 int (*ctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
562 int (*ctrl_str
) (EVP_PKEY_CTX
*ctx
,
567 pmeth
->ctrl_str
= ctrl_str
;
570 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD
*pmeth
,
571 int (**pinit
) (EVP_PKEY_CTX
*ctx
))
573 *pinit
= pmeth
->init
;
576 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD
*pmeth
,
577 int (**pcopy
) (EVP_PKEY_CTX
*dst
,
580 *pcopy
= pmeth
->copy
;
583 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD
*pmeth
,
584 void (**pcleanup
) (EVP_PKEY_CTX
*ctx
))
586 *pcleanup
= pmeth
->cleanup
;
589 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD
*pmeth
,
590 int (**pparamgen_init
) (EVP_PKEY_CTX
*ctx
),
591 int (**pparamgen
) (EVP_PKEY_CTX
*ctx
,
595 *pparamgen_init
= pmeth
->paramgen_init
;
597 *pparamgen
= pmeth
->paramgen
;
600 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD
*pmeth
,
601 int (**pkeygen_init
) (EVP_PKEY_CTX
*ctx
),
602 int (**pkeygen
) (EVP_PKEY_CTX
*ctx
,
606 *pkeygen_init
= pmeth
->keygen_init
;
608 *pkeygen
= pmeth
->keygen
;
611 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD
*pmeth
,
612 int (**psign_init
) (EVP_PKEY_CTX
*ctx
),
613 int (**psign
) (EVP_PKEY_CTX
*ctx
,
614 unsigned char *sig
, size_t *siglen
,
615 const unsigned char *tbs
,
619 *psign_init
= pmeth
->sign_init
;
621 *psign
= pmeth
->sign
;
624 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD
*pmeth
,
625 int (**pverify_init
) (EVP_PKEY_CTX
*ctx
),
626 int (**pverify
) (EVP_PKEY_CTX
*ctx
,
627 const unsigned char *sig
,
629 const unsigned char *tbs
,
633 *pverify_init
= pmeth
->verify_init
;
635 *pverify
= pmeth
->verify
;
638 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD
*pmeth
,
639 int (**pverify_recover_init
) (EVP_PKEY_CTX
641 int (**pverify_recover
) (EVP_PKEY_CTX
650 if (pverify_recover_init
)
651 *pverify_recover_init
= pmeth
->verify_recover_init
;
653 *pverify_recover
= pmeth
->verify_recover
;
656 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD
*pmeth
,
657 int (**psignctx_init
) (EVP_PKEY_CTX
*ctx
,
659 int (**psignctx
) (EVP_PKEY_CTX
*ctx
,
665 *psignctx_init
= pmeth
->signctx_init
;
667 *psignctx
= pmeth
->signctx
;
670 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD
*pmeth
,
671 int (**pverifyctx_init
) (EVP_PKEY_CTX
*ctx
,
673 int (**pverifyctx
) (EVP_PKEY_CTX
*ctx
,
674 const unsigned char *sig
,
679 *pverifyctx_init
= pmeth
->verifyctx_init
;
681 *pverifyctx
= pmeth
->verifyctx
;
684 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD
*pmeth
,
685 int (**pencrypt_init
) (EVP_PKEY_CTX
*ctx
),
686 int (**pencryptfn
) (EVP_PKEY_CTX
*ctx
,
689 const unsigned char *in
,
693 *pencrypt_init
= pmeth
->encrypt_init
;
695 *pencryptfn
= pmeth
->encrypt
;
698 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD
*pmeth
,
699 int (**pdecrypt_init
) (EVP_PKEY_CTX
*ctx
),
700 int (**pdecrypt
) (EVP_PKEY_CTX
*ctx
,
703 const unsigned char *in
,
707 *pdecrypt_init
= pmeth
->decrypt_init
;
709 *pdecrypt
= pmeth
->decrypt
;
712 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD
*pmeth
,
713 int (**pderive_init
) (EVP_PKEY_CTX
*ctx
),
714 int (**pderive
) (EVP_PKEY_CTX
*ctx
,
719 *pderive_init
= pmeth
->derive_init
;
721 *pderive
= pmeth
->derive
;
724 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD
*pmeth
,
725 int (**pctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
727 int (**pctrl_str
) (EVP_PKEY_CTX
*ctx
,
732 *pctrl
= pmeth
->ctrl
;
734 *pctrl_str
= pmeth
->ctrl_str
;