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 "asn1_locl.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
94 #ifndef OPENSSL_NO_CMAC
102 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
105 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
106 const EVP_PKEY_METHOD *const *b)
108 return ((*a)->pkey_id - (*b)->pkey_id);
111 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
114 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
117 const EVP_PKEY_METHOD *t = &tmp, **ret;
119 if (app_pkey_methods) {
121 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
123 return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
125 ret = OBJ_bsearch_pmeth(&t, standard_methods,
126 sizeof(standard_methods) /
127 sizeof(EVP_PKEY_METHOD *));
133 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
136 const EVP_PKEY_METHOD *pmeth;
138 if (!pkey || !pkey->ameth)
140 id = pkey->ameth->pkey_id;
142 #ifndef OPENSSL_NO_ENGINE
143 if (pkey && pkey->engine)
145 /* Try to find an ENGINE which implements this method */
147 if (!ENGINE_init(e)) {
148 EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
152 e = ENGINE_get_pkey_meth_engine(id);
155 * If an ENGINE handled this method look it up. Othewise use internal
160 pmeth = ENGINE_get_pkey_meth(e, id);
163 pmeth = EVP_PKEY_meth_find(id);
166 EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
170 ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
172 #ifndef OPENSSL_NO_ENGINE
176 EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
181 ret->operation = EVP_PKEY_OP_UNDEFINED;
186 CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
190 if (pmeth->init(ret) <= 0) {
191 EVP_PKEY_CTX_free(ret);
199 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
201 EVP_PKEY_METHOD *pmeth;
203 pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
207 memset(pmeth, 0, sizeof(EVP_PKEY_METHOD));
210 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
214 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
215 const EVP_PKEY_METHOD *meth)
218 *ppkey_id = meth->pkey_id;
220 *pflags = meth->flags;
223 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
226 dst->init = src->init;
227 dst->copy = src->copy;
228 dst->cleanup = src->cleanup;
230 dst->paramgen_init = src->paramgen_init;
231 dst->paramgen = src->paramgen;
233 dst->keygen_init = src->keygen_init;
234 dst->keygen = src->keygen;
236 dst->sign_init = src->sign_init;
237 dst->sign = src->sign;
239 dst->verify_init = src->verify_init;
240 dst->verify = src->verify;
242 dst->verify_recover_init = src->verify_recover_init;
243 dst->verify_recover = src->verify_recover;
245 dst->signctx_init = src->signctx_init;
246 dst->signctx = src->signctx;
248 dst->verifyctx_init = src->verifyctx_init;
249 dst->verifyctx = src->verifyctx;
251 dst->encrypt_init = src->encrypt_init;
252 dst->encrypt = src->encrypt;
254 dst->decrypt_init = src->decrypt_init;
255 dst->decrypt = src->decrypt;
257 dst->derive_init = src->derive_init;
258 dst->derive = src->derive;
260 dst->ctrl = src->ctrl;
261 dst->ctrl_str = src->ctrl_str;
264 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
266 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
270 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
272 return int_ctx_new(pkey, e, -1);
275 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
277 return int_ctx_new(NULL, e, id);
280 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
283 if (!pctx->pmeth || !pctx->pmeth->copy)
285 #ifndef OPENSSL_NO_ENGINE
286 /* Make sure it's safe to copy a pkey context using an ENGINE */
287 if (pctx->engine && !ENGINE_init(pctx->engine)) {
288 EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
292 rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
296 rctx->pmeth = pctx->pmeth;
297 #ifndef OPENSSL_NO_ENGINE
298 rctx->engine = pctx->engine;
302 CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
304 rctx->pkey = pctx->pkey;
307 CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
309 rctx->peerkey = pctx->peerkey;
312 rctx->app_data = NULL;
313 rctx->operation = pctx->operation;
315 if (pctx->pmeth->copy(rctx, pctx) > 0)
318 EVP_PKEY_CTX_free(rctx);
323 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
325 if (app_pkey_methods == NULL) {
326 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
327 if (!app_pkey_methods)
330 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
332 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
336 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
340 if (ctx->pmeth && ctx->pmeth->cleanup)
341 ctx->pmeth->cleanup(ctx);
343 EVP_PKEY_free(ctx->pkey);
345 EVP_PKEY_free(ctx->peerkey);
346 #ifndef OPENSSL_NO_ENGINE
349 * The EVP_PKEY_CTX we used belongs to an ENGINE, release the
350 * functional reference we held for this reason.
352 ENGINE_finish(ctx->engine);
357 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
358 int cmd, int p1, void *p2)
361 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
362 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
365 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
368 if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
369 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
373 if ((optype != -1) && !(ctx->operation & optype)) {
374 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
378 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
381 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
387 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
388 const char *name, const char *value)
390 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
391 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
394 if (!strcmp(name, "digest")) {
396 if (!value || !(md = EVP_get_digestbyname(value))) {
397 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
400 return EVP_PKEY_CTX_set_signature_md(ctx, md);
402 return ctx->pmeth->ctrl_str(ctx, name, value);
405 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
407 return ctx->operation;
410 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
412 ctx->keygen_info = dat;
413 ctx->keygen_info_count = datlen;
416 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
421 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
426 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
431 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
436 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
438 ctx->app_data = data;
441 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
443 return ctx->app_data;
446 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
447 int (*init) (EVP_PKEY_CTX *ctx))
452 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
453 int (*copy) (EVP_PKEY_CTX *dst,
459 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
460 void (*cleanup) (EVP_PKEY_CTX *ctx))
462 pmeth->cleanup = cleanup;
465 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
466 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
467 int (*paramgen) (EVP_PKEY_CTX *ctx,
470 pmeth->paramgen_init = paramgen_init;
471 pmeth->paramgen = paramgen;
474 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
475 int (*keygen_init) (EVP_PKEY_CTX *ctx),
476 int (*keygen) (EVP_PKEY_CTX *ctx,
479 pmeth->keygen_init = keygen_init;
480 pmeth->keygen = keygen;
483 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
484 int (*sign_init) (EVP_PKEY_CTX *ctx),
485 int (*sign) (EVP_PKEY_CTX *ctx,
486 unsigned char *sig, size_t *siglen,
487 const unsigned char *tbs,
490 pmeth->sign_init = sign_init;
494 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
495 int (*verify_init) (EVP_PKEY_CTX *ctx),
496 int (*verify) (EVP_PKEY_CTX *ctx,
497 const unsigned char *sig,
499 const unsigned char *tbs,
502 pmeth->verify_init = verify_init;
503 pmeth->verify = verify;
506 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
507 int (*verify_recover_init) (EVP_PKEY_CTX
509 int (*verify_recover) (EVP_PKEY_CTX
518 pmeth->verify_recover_init = verify_recover_init;
519 pmeth->verify_recover = verify_recover;
522 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
523 int (*signctx_init) (EVP_PKEY_CTX *ctx,
525 int (*signctx) (EVP_PKEY_CTX *ctx,
530 pmeth->signctx_init = signctx_init;
531 pmeth->signctx = signctx;
534 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
535 int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
537 int (*verifyctx) (EVP_PKEY_CTX *ctx,
538 const unsigned char *sig,
542 pmeth->verifyctx_init = verifyctx_init;
543 pmeth->verifyctx = verifyctx;
546 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
547 int (*encrypt_init) (EVP_PKEY_CTX *ctx),
548 int (*encryptfn) (EVP_PKEY_CTX *ctx,
551 const unsigned char *in,
554 pmeth->encrypt_init = encrypt_init;
555 pmeth->encrypt = encryptfn;
558 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
559 int (*decrypt_init) (EVP_PKEY_CTX *ctx),
560 int (*decrypt) (EVP_PKEY_CTX *ctx,
563 const unsigned char *in,
566 pmeth->decrypt_init = decrypt_init;
567 pmeth->decrypt = decrypt;
570 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
571 int (*derive_init) (EVP_PKEY_CTX *ctx),
572 int (*derive) (EVP_PKEY_CTX *ctx,
576 pmeth->derive_init = derive_init;
577 pmeth->derive = derive;
580 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
581 int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
583 int (*ctrl_str) (EVP_PKEY_CTX *ctx,
588 pmeth->ctrl_str = ctrl_str;