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")) {
419 if (!value || !(md = EVP_get_digestbyname(value))) {
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;