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 #ifndef OPENSSL_NO_ENGINE
64 # include <openssl/engine.h>
66 #include <openssl/evp.h>
67 #include "internal/asn1_int.h"
68 #include "internal/evp_int.h"
70 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
72 DEFINE_CONST_STACK_OF(EVP_PKEY_METHOD)
73 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
75 static const EVP_PKEY_METHOD *standard_methods[] = {
76 #ifndef OPENSSL_NO_RSA
82 #ifndef OPENSSL_NO_DSA
95 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
98 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
99 const EVP_PKEY_METHOD *const *b)
101 return ((*a)->pkey_id - (*b)->pkey_id);
104 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
107 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
110 const EVP_PKEY_METHOD *t = &tmp, **ret;
112 if (app_pkey_methods) {
114 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
116 return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
118 ret = OBJ_bsearch_pmeth(&t, standard_methods,
119 sizeof(standard_methods) /
120 sizeof(EVP_PKEY_METHOD *));
126 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
129 const EVP_PKEY_METHOD *pmeth;
131 if (!pkey || !pkey->ameth)
133 id = pkey->ameth->pkey_id;
135 #ifndef OPENSSL_NO_ENGINE
136 if (pkey && pkey->engine)
138 /* Try to find an ENGINE which implements this method */
140 if (!ENGINE_init(e)) {
141 EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
145 e = ENGINE_get_pkey_meth_engine(id);
148 * If an ENGINE handled this method look it up. Othewise use internal
153 pmeth = ENGINE_get_pkey_meth(e, id);
156 pmeth = EVP_PKEY_meth_find(id);
159 EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
163 ret = OPENSSL_zalloc(sizeof(*ret));
165 #ifndef OPENSSL_NO_ENGINE
169 EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
174 ret->operation = EVP_PKEY_OP_UNDEFINED;
177 CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
180 if (pmeth->init(ret) <= 0) {
181 EVP_PKEY_CTX_free(ret);
189 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
191 EVP_PKEY_METHOD *pmeth;
193 pmeth = OPENSSL_zalloc(sizeof(*pmeth));
198 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
202 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
203 const EVP_PKEY_METHOD *meth)
206 *ppkey_id = meth->pkey_id;
208 *pflags = meth->flags;
211 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
214 dst->init = src->init;
215 dst->copy = src->copy;
216 dst->cleanup = src->cleanup;
218 dst->paramgen_init = src->paramgen_init;
219 dst->paramgen = src->paramgen;
221 dst->keygen_init = src->keygen_init;
222 dst->keygen = src->keygen;
224 dst->sign_init = src->sign_init;
225 dst->sign = src->sign;
227 dst->verify_init = src->verify_init;
228 dst->verify = src->verify;
230 dst->verify_recover_init = src->verify_recover_init;
231 dst->verify_recover = src->verify_recover;
233 dst->signctx_init = src->signctx_init;
234 dst->signctx = src->signctx;
236 dst->verifyctx_init = src->verifyctx_init;
237 dst->verifyctx = src->verifyctx;
239 dst->encrypt_init = src->encrypt_init;
240 dst->encrypt = src->encrypt;
242 dst->decrypt_init = src->decrypt_init;
243 dst->decrypt = src->decrypt;
245 dst->derive_init = src->derive_init;
246 dst->derive = src->derive;
248 dst->ctrl = src->ctrl;
249 dst->ctrl_str = src->ctrl_str;
252 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
254 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
258 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
260 return int_ctx_new(pkey, e, -1);
263 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
265 return int_ctx_new(NULL, e, id);
268 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
271 if (!pctx->pmeth || !pctx->pmeth->copy)
273 #ifndef OPENSSL_NO_ENGINE
274 /* Make sure it's safe to copy a pkey context using an ENGINE */
275 if (pctx->engine && !ENGINE_init(pctx->engine)) {
276 EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
280 rctx = OPENSSL_malloc(sizeof(*rctx));
284 rctx->pmeth = pctx->pmeth;
285 #ifndef OPENSSL_NO_ENGINE
286 rctx->engine = pctx->engine;
290 CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
292 rctx->pkey = pctx->pkey;
295 CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
297 rctx->peerkey = pctx->peerkey;
300 rctx->app_data = NULL;
301 rctx->operation = pctx->operation;
303 if (pctx->pmeth->copy(rctx, pctx) > 0)
306 EVP_PKEY_CTX_free(rctx);
311 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
313 if (app_pkey_methods == NULL) {
314 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
315 if (app_pkey_methods == NULL)
318 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
320 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
324 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
328 if (ctx->pmeth && ctx->pmeth->cleanup)
329 ctx->pmeth->cleanup(ctx);
330 EVP_PKEY_free(ctx->pkey);
331 EVP_PKEY_free(ctx->peerkey);
332 #ifndef OPENSSL_NO_ENGINE
335 * The EVP_PKEY_CTX we used belongs to an ENGINE, release the
336 * functional reference we held for this reason.
338 ENGINE_finish(ctx->engine);
343 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
344 int cmd, int p1, void *p2)
347 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
348 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
351 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
354 if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
355 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
359 if ((optype != -1) && !(ctx->operation & optype)) {
360 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
364 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
367 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
373 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
374 const char *name, const char *value)
376 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
377 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
380 if (strcmp(name, "digest") == 0) {
382 if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
383 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
386 return EVP_PKEY_CTX_set_signature_md(ctx, md);
388 return ctx->pmeth->ctrl_str(ctx, name, value);
391 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
393 return ctx->operation;
396 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
398 ctx->keygen_info = dat;
399 ctx->keygen_info_count = datlen;
402 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
407 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
412 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
417 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
422 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
424 ctx->app_data = data;
427 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
429 return ctx->app_data;
432 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
433 int (*init) (EVP_PKEY_CTX *ctx))
438 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
439 int (*copy) (EVP_PKEY_CTX *dst,
445 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
446 void (*cleanup) (EVP_PKEY_CTX *ctx))
448 pmeth->cleanup = cleanup;
451 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
452 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
453 int (*paramgen) (EVP_PKEY_CTX *ctx,
456 pmeth->paramgen_init = paramgen_init;
457 pmeth->paramgen = paramgen;
460 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
461 int (*keygen_init) (EVP_PKEY_CTX *ctx),
462 int (*keygen) (EVP_PKEY_CTX *ctx,
465 pmeth->keygen_init = keygen_init;
466 pmeth->keygen = keygen;
469 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
470 int (*sign_init) (EVP_PKEY_CTX *ctx),
471 int (*sign) (EVP_PKEY_CTX *ctx,
472 unsigned char *sig, size_t *siglen,
473 const unsigned char *tbs,
476 pmeth->sign_init = sign_init;
480 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
481 int (*verify_init) (EVP_PKEY_CTX *ctx),
482 int (*verify) (EVP_PKEY_CTX *ctx,
483 const unsigned char *sig,
485 const unsigned char *tbs,
488 pmeth->verify_init = verify_init;
489 pmeth->verify = verify;
492 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
493 int (*verify_recover_init) (EVP_PKEY_CTX
495 int (*verify_recover) (EVP_PKEY_CTX
504 pmeth->verify_recover_init = verify_recover_init;
505 pmeth->verify_recover = verify_recover;
508 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
509 int (*signctx_init) (EVP_PKEY_CTX *ctx,
511 int (*signctx) (EVP_PKEY_CTX *ctx,
516 pmeth->signctx_init = signctx_init;
517 pmeth->signctx = signctx;
520 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
521 int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
523 int (*verifyctx) (EVP_PKEY_CTX *ctx,
524 const unsigned char *sig,
528 pmeth->verifyctx_init = verifyctx_init;
529 pmeth->verifyctx = verifyctx;
532 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
533 int (*encrypt_init) (EVP_PKEY_CTX *ctx),
534 int (*encryptfn) (EVP_PKEY_CTX *ctx,
537 const unsigned char *in,
540 pmeth->encrypt_init = encrypt_init;
541 pmeth->encrypt = encryptfn;
544 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
545 int (*decrypt_init) (EVP_PKEY_CTX *ctx),
546 int (*decrypt) (EVP_PKEY_CTX *ctx,
549 const unsigned char *in,
552 pmeth->decrypt_init = decrypt_init;
553 pmeth->decrypt = decrypt;
556 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
557 int (*derive_init) (EVP_PKEY_CTX *ctx),
558 int (*derive) (EVP_PKEY_CTX *ctx,
562 pmeth->derive_init = derive_init;
563 pmeth->derive = derive;
566 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
567 int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
569 int (*ctrl_str) (EVP_PKEY_CTX *ctx,
574 pmeth->ctrl_str = ctrl_str;
577 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
578 int (**pinit) (EVP_PKEY_CTX *ctx))
580 *pinit = pmeth->init;
583 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
584 int (**pcopy) (EVP_PKEY_CTX *dst,
587 *pcopy = pmeth->copy;
590 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
591 void (**pcleanup) (EVP_PKEY_CTX *ctx))
593 *pcleanup = pmeth->cleanup;
596 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
597 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
598 int (**pparamgen) (EVP_PKEY_CTX *ctx,
602 *pparamgen_init = pmeth->paramgen_init;
604 *pparamgen = pmeth->paramgen;
607 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
608 int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
609 int (**pkeygen) (EVP_PKEY_CTX *ctx,
613 *pkeygen_init = pmeth->keygen_init;
615 *pkeygen = pmeth->keygen;
618 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
619 int (**psign_init) (EVP_PKEY_CTX *ctx),
620 int (**psign) (EVP_PKEY_CTX *ctx,
621 unsigned char *sig, size_t *siglen,
622 const unsigned char *tbs,
626 *psign_init = pmeth->sign_init;
628 *psign = pmeth->sign;
631 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
632 int (**pverify_init) (EVP_PKEY_CTX *ctx),
633 int (**pverify) (EVP_PKEY_CTX *ctx,
634 const unsigned char *sig,
636 const unsigned char *tbs,
640 *pverify_init = pmeth->verify_init;
642 *pverify = pmeth->verify;
645 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
646 int (**pverify_recover_init) (EVP_PKEY_CTX
648 int (**pverify_recover) (EVP_PKEY_CTX
657 if (pverify_recover_init)
658 *pverify_recover_init = pmeth->verify_recover_init;
660 *pverify_recover = pmeth->verify_recover;
663 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
664 int (**psignctx_init) (EVP_PKEY_CTX *ctx,
666 int (**psignctx) (EVP_PKEY_CTX *ctx,
672 *psignctx_init = pmeth->signctx_init;
674 *psignctx = pmeth->signctx;
677 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
678 int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
680 int (**pverifyctx) (EVP_PKEY_CTX *ctx,
681 const unsigned char *sig,
686 *pverifyctx_init = pmeth->verifyctx_init;
688 *pverifyctx = pmeth->verifyctx;
691 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
692 int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
693 int (**pencryptfn) (EVP_PKEY_CTX *ctx,
696 const unsigned char *in,
700 *pencrypt_init = pmeth->encrypt_init;
702 *pencryptfn = pmeth->encrypt;
705 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
706 int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
707 int (**pdecrypt) (EVP_PKEY_CTX *ctx,
710 const unsigned char *in,
714 *pdecrypt_init = pmeth->decrypt_init;
716 *pdecrypt = pmeth->decrypt;
719 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
720 int (**pderive_init) (EVP_PKEY_CTX *ctx),
721 int (**pderive) (EVP_PKEY_CTX *ctx,
726 *pderive_init = pmeth->derive_init;
728 *pderive = pmeth->derive;
731 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
732 int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
734 int (**pctrl_str) (EVP_PKEY_CTX *ctx,
739 *pctrl = pmeth->ctrl;
741 *pctrl_str = pmeth->ctrl_str;