2 * Copyright 2006-2016 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
54 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
57 static int pmeth_cmp(const EVP_PKEY_METHOD
*const *a
,
58 const EVP_PKEY_METHOD
*const *b
)
60 return ((*a
)->pkey_id
- (*b
)->pkey_id
);
63 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD
*, const EVP_PKEY_METHOD
*,
66 const EVP_PKEY_METHOD
*EVP_PKEY_meth_find(int type
)
69 const EVP_PKEY_METHOD
*t
= &tmp
, **ret
;
71 if (app_pkey_methods
) {
73 idx
= sk_EVP_PKEY_METHOD_find(app_pkey_methods
, &tmp
);
75 return sk_EVP_PKEY_METHOD_value(app_pkey_methods
, idx
);
77 ret
= OBJ_bsearch_pmeth(&t
, standard_methods
,
78 sizeof(standard_methods
) /
79 sizeof(EVP_PKEY_METHOD
*));
85 static EVP_PKEY_CTX
*int_ctx_new(EVP_PKEY
*pkey
, ENGINE
*e
, int id
)
88 const EVP_PKEY_METHOD
*pmeth
;
90 if (!pkey
|| !pkey
->ameth
)
92 id
= pkey
->ameth
->pkey_id
;
94 #ifndef OPENSSL_NO_ENGINE
95 if (pkey
&& pkey
->engine
)
97 /* Try to find an ENGINE which implements this method */
99 if (!ENGINE_init(e
)) {
100 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_ENGINE_LIB
);
104 e
= ENGINE_get_pkey_meth_engine(id
);
107 * If an ENGINE handled this method look it up. Otherwise use internal
112 pmeth
= ENGINE_get_pkey_meth(e
, id
);
115 pmeth
= EVP_PKEY_meth_find(id
);
118 EVPerr(EVP_F_INT_CTX_NEW
, EVP_R_UNSUPPORTED_ALGORITHM
);
122 ret
= OPENSSL_zalloc(sizeof(*ret
));
124 #ifndef OPENSSL_NO_ENGINE
127 EVPerr(EVP_F_INT_CTX_NEW
, ERR_R_MALLOC_FAILURE
);
132 ret
->operation
= EVP_PKEY_OP_UNDEFINED
;
135 EVP_PKEY_up_ref(pkey
);
138 if (pmeth
->init(ret
) <= 0) {
139 EVP_PKEY_CTX_free(ret
);
147 EVP_PKEY_METHOD
*EVP_PKEY_meth_new(int id
, int flags
)
149 EVP_PKEY_METHOD
*pmeth
;
151 pmeth
= OPENSSL_zalloc(sizeof(*pmeth
));
156 pmeth
->flags
= flags
| EVP_PKEY_FLAG_DYNAMIC
;
160 void EVP_PKEY_meth_get0_info(int *ppkey_id
, int *pflags
,
161 const EVP_PKEY_METHOD
*meth
)
164 *ppkey_id
= meth
->pkey_id
;
166 *pflags
= meth
->flags
;
169 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD
*dst
, const EVP_PKEY_METHOD
*src
)
172 dst
->init
= src
->init
;
173 dst
->copy
= src
->copy
;
174 dst
->cleanup
= src
->cleanup
;
176 dst
->paramgen_init
= src
->paramgen_init
;
177 dst
->paramgen
= src
->paramgen
;
179 dst
->keygen_init
= src
->keygen_init
;
180 dst
->keygen
= src
->keygen
;
182 dst
->sign_init
= src
->sign_init
;
183 dst
->sign
= src
->sign
;
185 dst
->verify_init
= src
->verify_init
;
186 dst
->verify
= src
->verify
;
188 dst
->verify_recover_init
= src
->verify_recover_init
;
189 dst
->verify_recover
= src
->verify_recover
;
191 dst
->signctx_init
= src
->signctx_init
;
192 dst
->signctx
= src
->signctx
;
194 dst
->verifyctx_init
= src
->verifyctx_init
;
195 dst
->verifyctx
= src
->verifyctx
;
197 dst
->encrypt_init
= src
->encrypt_init
;
198 dst
->encrypt
= src
->encrypt
;
200 dst
->decrypt_init
= src
->decrypt_init
;
201 dst
->decrypt
= src
->decrypt
;
203 dst
->derive_init
= src
->derive_init
;
204 dst
->derive
= src
->derive
;
206 dst
->ctrl
= src
->ctrl
;
207 dst
->ctrl_str
= src
->ctrl_str
;
210 void EVP_PKEY_meth_free(EVP_PKEY_METHOD
*pmeth
)
212 if (pmeth
&& (pmeth
->flags
& EVP_PKEY_FLAG_DYNAMIC
))
216 EVP_PKEY_CTX
*EVP_PKEY_CTX_new(EVP_PKEY
*pkey
, ENGINE
*e
)
218 return int_ctx_new(pkey
, e
, -1);
221 EVP_PKEY_CTX
*EVP_PKEY_CTX_new_id(int id
, ENGINE
*e
)
223 return int_ctx_new(NULL
, e
, id
);
226 EVP_PKEY_CTX
*EVP_PKEY_CTX_dup(EVP_PKEY_CTX
*pctx
)
229 if (!pctx
->pmeth
|| !pctx
->pmeth
->copy
)
231 #ifndef OPENSSL_NO_ENGINE
232 /* Make sure it's safe to copy a pkey context using an ENGINE */
233 if (pctx
->engine
&& !ENGINE_init(pctx
->engine
)) {
234 EVPerr(EVP_F_EVP_PKEY_CTX_DUP
, ERR_R_ENGINE_LIB
);
238 rctx
= OPENSSL_malloc(sizeof(*rctx
));
242 rctx
->pmeth
= pctx
->pmeth
;
243 #ifndef OPENSSL_NO_ENGINE
244 rctx
->engine
= pctx
->engine
;
248 EVP_PKEY_up_ref(pctx
->pkey
);
250 rctx
->pkey
= pctx
->pkey
;
253 EVP_PKEY_up_ref(pctx
->peerkey
);
255 rctx
->peerkey
= pctx
->peerkey
;
258 rctx
->app_data
= NULL
;
259 rctx
->operation
= pctx
->operation
;
261 if (pctx
->pmeth
->copy(rctx
, pctx
) > 0)
264 EVP_PKEY_CTX_free(rctx
);
269 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD
*pmeth
)
271 if (app_pkey_methods
== NULL
) {
272 app_pkey_methods
= sk_EVP_PKEY_METHOD_new(pmeth_cmp
);
273 if (app_pkey_methods
== NULL
)
276 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods
, pmeth
))
278 sk_EVP_PKEY_METHOD_sort(app_pkey_methods
);
282 void EVP_PKEY_CTX_free(EVP_PKEY_CTX
*ctx
)
286 if (ctx
->pmeth
&& ctx
->pmeth
->cleanup
)
287 ctx
->pmeth
->cleanup(ctx
);
288 EVP_PKEY_free(ctx
->pkey
);
289 EVP_PKEY_free(ctx
->peerkey
);
290 #ifndef OPENSSL_NO_ENGINE
291 ENGINE_finish(ctx
->engine
);
296 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX
*ctx
, int keytype
, int optype
,
297 int cmd
, int p1
, void *p2
)
300 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl
) {
301 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
304 if ((keytype
!= -1) && (ctx
->pmeth
->pkey_id
!= keytype
))
307 if (ctx
->operation
== EVP_PKEY_OP_UNDEFINED
) {
308 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_NO_OPERATION_SET
);
312 if ((optype
!= -1) && !(ctx
->operation
& optype
)) {
313 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_INVALID_OPERATION
);
317 ret
= ctx
->pmeth
->ctrl(ctx
, cmd
, p1
, p2
);
320 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL
, EVP_R_COMMAND_NOT_SUPPORTED
);
326 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX
*ctx
,
327 const char *name
, const char *value
)
329 if (!ctx
|| !ctx
->pmeth
|| !ctx
->pmeth
->ctrl_str
) {
330 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR
, EVP_R_COMMAND_NOT_SUPPORTED
);
333 if (strcmp(name
, "digest") == 0)
334 return EVP_PKEY_CTX_md(ctx
, EVP_PKEY_OP_TYPE_SIG
, EVP_PKEY_CTRL_MD
,
336 return ctx
->pmeth
->ctrl_str(ctx
, name
, value
);
339 /* Utility functions to send a string of hex string to a ctrl */
341 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX
*ctx
, int cmd
, const char *str
)
348 return ctx
->pmeth
->ctrl(ctx
, cmd
, len
, (void *)str
);
351 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX
*ctx
, int cmd
, const char *hex
)
357 bin
= OPENSSL_hexstr2buf(hex
, &binlen
);
360 if (binlen
<= INT_MAX
)
361 rv
= ctx
->pmeth
->ctrl(ctx
, cmd
, binlen
, bin
);
365 /* Pass a message digest to a ctrl */
366 int EVP_PKEY_CTX_md(EVP_PKEY_CTX
*ctx
, int optype
, int cmd
, const char *md
)
369 if (md
== NULL
|| (m
= EVP_get_digestbyname(md
)) == NULL
) {
370 EVPerr(EVP_F_EVP_PKEY_CTX_MD
, EVP_R_INVALID_DIGEST
);
373 return EVP_PKEY_CTX_ctrl(ctx
, -1, optype
, cmd
, 0, (void *)m
);
376 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX
*ctx
)
378 return ctx
->operation
;
381 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX
*ctx
, int *dat
, int datlen
)
383 ctx
->keygen_info
= dat
;
384 ctx
->keygen_info_count
= datlen
;
387 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX
*ctx
, void *data
)
392 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX
*ctx
)
397 EVP_PKEY
*EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX
*ctx
)
402 EVP_PKEY
*EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX
*ctx
)
407 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX
*ctx
, void *data
)
409 ctx
->app_data
= data
;
412 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX
*ctx
)
414 return ctx
->app_data
;
417 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD
*pmeth
,
418 int (*init
) (EVP_PKEY_CTX
*ctx
))
423 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD
*pmeth
,
424 int (*copy
) (EVP_PKEY_CTX
*dst
,
430 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD
*pmeth
,
431 void (*cleanup
) (EVP_PKEY_CTX
*ctx
))
433 pmeth
->cleanup
= cleanup
;
436 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD
*pmeth
,
437 int (*paramgen_init
) (EVP_PKEY_CTX
*ctx
),
438 int (*paramgen
) (EVP_PKEY_CTX
*ctx
,
441 pmeth
->paramgen_init
= paramgen_init
;
442 pmeth
->paramgen
= paramgen
;
445 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD
*pmeth
,
446 int (*keygen_init
) (EVP_PKEY_CTX
*ctx
),
447 int (*keygen
) (EVP_PKEY_CTX
*ctx
,
450 pmeth
->keygen_init
= keygen_init
;
451 pmeth
->keygen
= keygen
;
454 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD
*pmeth
,
455 int (*sign_init
) (EVP_PKEY_CTX
*ctx
),
456 int (*sign
) (EVP_PKEY_CTX
*ctx
,
457 unsigned char *sig
, size_t *siglen
,
458 const unsigned char *tbs
,
461 pmeth
->sign_init
= sign_init
;
465 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD
*pmeth
,
466 int (*verify_init
) (EVP_PKEY_CTX
*ctx
),
467 int (*verify
) (EVP_PKEY_CTX
*ctx
,
468 const unsigned char *sig
,
470 const unsigned char *tbs
,
473 pmeth
->verify_init
= verify_init
;
474 pmeth
->verify
= verify
;
477 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD
*pmeth
,
478 int (*verify_recover_init
) (EVP_PKEY_CTX
480 int (*verify_recover
) (EVP_PKEY_CTX
489 pmeth
->verify_recover_init
= verify_recover_init
;
490 pmeth
->verify_recover
= verify_recover
;
493 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD
*pmeth
,
494 int (*signctx_init
) (EVP_PKEY_CTX
*ctx
,
496 int (*signctx
) (EVP_PKEY_CTX
*ctx
,
501 pmeth
->signctx_init
= signctx_init
;
502 pmeth
->signctx
= signctx
;
505 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD
*pmeth
,
506 int (*verifyctx_init
) (EVP_PKEY_CTX
*ctx
,
508 int (*verifyctx
) (EVP_PKEY_CTX
*ctx
,
509 const unsigned char *sig
,
513 pmeth
->verifyctx_init
= verifyctx_init
;
514 pmeth
->verifyctx
= verifyctx
;
517 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD
*pmeth
,
518 int (*encrypt_init
) (EVP_PKEY_CTX
*ctx
),
519 int (*encryptfn
) (EVP_PKEY_CTX
*ctx
,
522 const unsigned char *in
,
525 pmeth
->encrypt_init
= encrypt_init
;
526 pmeth
->encrypt
= encryptfn
;
529 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD
*pmeth
,
530 int (*decrypt_init
) (EVP_PKEY_CTX
*ctx
),
531 int (*decrypt
) (EVP_PKEY_CTX
*ctx
,
534 const unsigned char *in
,
537 pmeth
->decrypt_init
= decrypt_init
;
538 pmeth
->decrypt
= decrypt
;
541 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD
*pmeth
,
542 int (*derive_init
) (EVP_PKEY_CTX
*ctx
),
543 int (*derive
) (EVP_PKEY_CTX
*ctx
,
547 pmeth
->derive_init
= derive_init
;
548 pmeth
->derive
= derive
;
551 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD
*pmeth
,
552 int (*ctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
554 int (*ctrl_str
) (EVP_PKEY_CTX
*ctx
,
559 pmeth
->ctrl_str
= ctrl_str
;
562 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD
*pmeth
,
563 int (**pinit
) (EVP_PKEY_CTX
*ctx
))
565 *pinit
= pmeth
->init
;
568 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD
*pmeth
,
569 int (**pcopy
) (EVP_PKEY_CTX
*dst
,
572 *pcopy
= pmeth
->copy
;
575 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD
*pmeth
,
576 void (**pcleanup
) (EVP_PKEY_CTX
*ctx
))
578 *pcleanup
= pmeth
->cleanup
;
581 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD
*pmeth
,
582 int (**pparamgen_init
) (EVP_PKEY_CTX
*ctx
),
583 int (**pparamgen
) (EVP_PKEY_CTX
*ctx
,
587 *pparamgen_init
= pmeth
->paramgen_init
;
589 *pparamgen
= pmeth
->paramgen
;
592 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD
*pmeth
,
593 int (**pkeygen_init
) (EVP_PKEY_CTX
*ctx
),
594 int (**pkeygen
) (EVP_PKEY_CTX
*ctx
,
598 *pkeygen_init
= pmeth
->keygen_init
;
600 *pkeygen
= pmeth
->keygen
;
603 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD
*pmeth
,
604 int (**psign_init
) (EVP_PKEY_CTX
*ctx
),
605 int (**psign
) (EVP_PKEY_CTX
*ctx
,
606 unsigned char *sig
, size_t *siglen
,
607 const unsigned char *tbs
,
611 *psign_init
= pmeth
->sign_init
;
613 *psign
= pmeth
->sign
;
616 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD
*pmeth
,
617 int (**pverify_init
) (EVP_PKEY_CTX
*ctx
),
618 int (**pverify
) (EVP_PKEY_CTX
*ctx
,
619 const unsigned char *sig
,
621 const unsigned char *tbs
,
625 *pverify_init
= pmeth
->verify_init
;
627 *pverify
= pmeth
->verify
;
630 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD
*pmeth
,
631 int (**pverify_recover_init
) (EVP_PKEY_CTX
633 int (**pverify_recover
) (EVP_PKEY_CTX
642 if (pverify_recover_init
)
643 *pverify_recover_init
= pmeth
->verify_recover_init
;
645 *pverify_recover
= pmeth
->verify_recover
;
648 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD
*pmeth
,
649 int (**psignctx_init
) (EVP_PKEY_CTX
*ctx
,
651 int (**psignctx
) (EVP_PKEY_CTX
*ctx
,
657 *psignctx_init
= pmeth
->signctx_init
;
659 *psignctx
= pmeth
->signctx
;
662 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD
*pmeth
,
663 int (**pverifyctx_init
) (EVP_PKEY_CTX
*ctx
,
665 int (**pverifyctx
) (EVP_PKEY_CTX
*ctx
,
666 const unsigned char *sig
,
671 *pverifyctx_init
= pmeth
->verifyctx_init
;
673 *pverifyctx
= pmeth
->verifyctx
;
676 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD
*pmeth
,
677 int (**pencrypt_init
) (EVP_PKEY_CTX
*ctx
),
678 int (**pencryptfn
) (EVP_PKEY_CTX
*ctx
,
681 const unsigned char *in
,
685 *pencrypt_init
= pmeth
->encrypt_init
;
687 *pencryptfn
= pmeth
->encrypt
;
690 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD
*pmeth
,
691 int (**pdecrypt_init
) (EVP_PKEY_CTX
*ctx
),
692 int (**pdecrypt
) (EVP_PKEY_CTX
*ctx
,
695 const unsigned char *in
,
699 *pdecrypt_init
= pmeth
->decrypt_init
;
701 *pdecrypt
= pmeth
->decrypt
;
704 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD
*pmeth
,
705 int (**pderive_init
) (EVP_PKEY_CTX
*ctx
),
706 int (**pderive
) (EVP_PKEY_CTX
*ctx
,
711 *pderive_init
= pmeth
->derive_init
;
713 *pderive
= pmeth
->derive
;
716 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD
*pmeth
,
717 int (**pctrl
) (EVP_PKEY_CTX
*ctx
, int type
, int p1
,
719 int (**pctrl_str
) (EVP_PKEY_CTX
*ctx
,
724 *pctrl
= pmeth
->ctrl
;
726 *pctrl_str
= pmeth
->ctrl_str
;