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"
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(EVP_PKEY_CTX));
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;
200 pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
204 memset(pmeth, 0, sizeof(EVP_PKEY_METHOD));
207 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
212 pmeth->paramgen_init = 0;
214 pmeth->keygen_init = 0;
216 pmeth->sign_init = 0;
218 pmeth->verify_init = 0;
220 pmeth->verify_recover_init = 0;
221 pmeth->verify_recover = 0;
222 pmeth->signctx_init = 0;
224 pmeth->verifyctx_init = 0;
225 pmeth->verifyctx = 0;
226 pmeth->encrypt_init = 0;
228 pmeth->decrypt_init = 0;
230 pmeth->derive_init = 0;
238 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
239 const EVP_PKEY_METHOD *meth)
242 *ppkey_id = meth->pkey_id;
244 *pflags = meth->flags;
247 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
250 dst->init = src->init;
251 dst->copy = src->copy;
252 dst->cleanup = src->cleanup;
254 dst->paramgen_init = src->paramgen_init;
255 dst->paramgen = src->paramgen;
257 dst->keygen_init = src->keygen_init;
258 dst->keygen = src->keygen;
260 dst->sign_init = src->sign_init;
261 dst->sign = src->sign;
263 dst->verify_init = src->verify_init;
264 dst->verify = src->verify;
266 dst->verify_recover_init = src->verify_recover_init;
267 dst->verify_recover = src->verify_recover;
269 dst->signctx_init = src->signctx_init;
270 dst->signctx = src->signctx;
272 dst->verifyctx_init = src->verifyctx_init;
273 dst->verifyctx = src->verifyctx;
275 dst->encrypt_init = src->encrypt_init;
276 dst->encrypt = src->encrypt;
278 dst->decrypt_init = src->decrypt_init;
279 dst->decrypt = src->decrypt;
281 dst->derive_init = src->derive_init;
282 dst->derive = src->derive;
284 dst->ctrl = src->ctrl;
285 dst->ctrl_str = src->ctrl_str;
288 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
290 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
294 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
296 return int_ctx_new(pkey, e, -1);
299 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
301 return int_ctx_new(NULL, e, id);
304 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
307 if (!pctx->pmeth || !pctx->pmeth->copy)
309 #ifndef OPENSSL_NO_ENGINE
310 /* Make sure it's safe to copy a pkey context using an ENGINE */
311 if (pctx->engine && !ENGINE_init(pctx->engine)) {
312 EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
316 rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
320 rctx->pmeth = pctx->pmeth;
321 #ifndef OPENSSL_NO_ENGINE
322 rctx->engine = pctx->engine;
326 CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
328 rctx->pkey = pctx->pkey;
331 CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
333 rctx->peerkey = pctx->peerkey;
336 rctx->app_data = NULL;
337 rctx->operation = pctx->operation;
339 if (pctx->pmeth->copy(rctx, pctx) > 0)
342 EVP_PKEY_CTX_free(rctx);
347 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
349 if (app_pkey_methods == NULL) {
350 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
351 if (!app_pkey_methods)
354 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
356 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
360 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
364 if (ctx->pmeth && ctx->pmeth->cleanup)
365 ctx->pmeth->cleanup(ctx);
367 EVP_PKEY_free(ctx->pkey);
369 EVP_PKEY_free(ctx->peerkey);
370 #ifndef OPENSSL_NO_ENGINE
373 * The EVP_PKEY_CTX we used belongs to an ENGINE, release the
374 * functional reference we held for this reason.
376 ENGINE_finish(ctx->engine);
381 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
382 int cmd, int p1, void *p2)
385 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
386 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
389 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
392 if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
393 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
397 if ((optype != -1) && !(ctx->operation & optype)) {
398 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
402 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
405 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
411 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
412 const char *name, const char *value)
414 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
415 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
418 if (!strcmp(name, "digest")) {
420 if (!value || !(md = EVP_get_digestbyname(value))) {
421 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
424 return EVP_PKEY_CTX_set_signature_md(ctx, md);
426 return ctx->pmeth->ctrl_str(ctx, name, value);
429 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
431 return ctx->operation;
434 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
436 ctx->keygen_info = dat;
437 ctx->keygen_info_count = datlen;
440 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
445 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
450 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
455 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
460 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
462 ctx->app_data = data;
465 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
467 return ctx->app_data;
470 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
471 int (*init) (EVP_PKEY_CTX *ctx))
476 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
477 int (*copy) (EVP_PKEY_CTX *dst,
483 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
484 void (*cleanup) (EVP_PKEY_CTX *ctx))
486 pmeth->cleanup = cleanup;
489 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
490 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
491 int (*paramgen) (EVP_PKEY_CTX *ctx,
494 pmeth->paramgen_init = paramgen_init;
495 pmeth->paramgen = paramgen;
498 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
499 int (*keygen_init) (EVP_PKEY_CTX *ctx),
500 int (*keygen) (EVP_PKEY_CTX *ctx,
503 pmeth->keygen_init = keygen_init;
504 pmeth->keygen = keygen;
507 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
508 int (*sign_init) (EVP_PKEY_CTX *ctx),
509 int (*sign) (EVP_PKEY_CTX *ctx,
510 unsigned char *sig, size_t *siglen,
511 const unsigned char *tbs,
514 pmeth->sign_init = sign_init;
518 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
519 int (*verify_init) (EVP_PKEY_CTX *ctx),
520 int (*verify) (EVP_PKEY_CTX *ctx,
521 const unsigned char *sig,
523 const unsigned char *tbs,
526 pmeth->verify_init = verify_init;
527 pmeth->verify = verify;
530 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
531 int (*verify_recover_init) (EVP_PKEY_CTX
533 int (*verify_recover) (EVP_PKEY_CTX
542 pmeth->verify_recover_init = verify_recover_init;
543 pmeth->verify_recover = verify_recover;
546 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
547 int (*signctx_init) (EVP_PKEY_CTX *ctx,
549 int (*signctx) (EVP_PKEY_CTX *ctx,
554 pmeth->signctx_init = signctx_init;
555 pmeth->signctx = signctx;
558 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
559 int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
561 int (*verifyctx) (EVP_PKEY_CTX *ctx,
562 const unsigned char *sig,
566 pmeth->verifyctx_init = verifyctx_init;
567 pmeth->verifyctx = verifyctx;
570 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
571 int (*encrypt_init) (EVP_PKEY_CTX *ctx),
572 int (*encryptfn) (EVP_PKEY_CTX *ctx,
575 const unsigned char *in,
578 pmeth->encrypt_init = encrypt_init;
579 pmeth->encrypt = encryptfn;
582 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
583 int (*decrypt_init) (EVP_PKEY_CTX *ctx),
584 int (*decrypt) (EVP_PKEY_CTX *ctx,
587 const unsigned char *in,
590 pmeth->decrypt_init = decrypt_init;
591 pmeth->decrypt = decrypt;
594 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
595 int (*derive_init) (EVP_PKEY_CTX *ctx),
596 int (*derive) (EVP_PKEY_CTX *ctx,
600 pmeth->derive_init = derive_init;
601 pmeth->derive = derive;
604 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
605 int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
607 int (*ctrl_str) (EVP_PKEY_CTX *ctx,
612 pmeth->ctrl_str = ctrl_str;