614 lines
18 KiB
C
614 lines
18 KiB
C
/* pmeth_lib.c */
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/*
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
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* 2006.
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*/
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/* ====================================================================
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "cryptlib.h"
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#ifndef OPENSSL_NO_ENGINE
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# include <openssl/engine.h>
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#endif
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#include "asn1_locl.h"
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#include "evp_locl.h"
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typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
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DECLARE_STACK_OF(EVP_PKEY_METHOD)
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STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
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extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
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extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth, cmac_pkey_meth;
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extern const EVP_PKEY_METHOD dhx_pkey_meth;
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static const EVP_PKEY_METHOD *standard_methods[] = {
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#ifndef OPENSSL_NO_RSA
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&rsa_pkey_meth,
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#endif
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#ifndef OPENSSL_NO_DH
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&dh_pkey_meth,
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#endif
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#ifndef OPENSSL_NO_DSA
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&dsa_pkey_meth,
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#endif
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#ifndef OPENSSL_NO_EC
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&ec_pkey_meth,
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#endif
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&hmac_pkey_meth,
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&cmac_pkey_meth,
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#ifndef OPENSSL_NO_DH
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&dhx_pkey_meth
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#endif
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};
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DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
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pmeth);
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static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
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const EVP_PKEY_METHOD *const *b)
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{
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return ((*a)->pkey_id - (*b)->pkey_id);
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}
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IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
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pmeth);
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const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
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{
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EVP_PKEY_METHOD tmp;
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const EVP_PKEY_METHOD *t = &tmp, **ret;
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tmp.pkey_id = type;
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if (app_pkey_methods) {
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int idx;
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idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
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if (idx >= 0)
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return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
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}
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ret = OBJ_bsearch_pmeth(&t, standard_methods,
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sizeof(standard_methods) /
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sizeof(EVP_PKEY_METHOD *));
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if (!ret || !*ret)
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return NULL;
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return *ret;
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}
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static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
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{
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EVP_PKEY_CTX *ret;
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const EVP_PKEY_METHOD *pmeth;
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if (id == -1) {
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if (!pkey || !pkey->ameth)
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return NULL;
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id = pkey->ameth->pkey_id;
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}
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#ifndef OPENSSL_NO_ENGINE
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if (pkey && pkey->engine)
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e = pkey->engine;
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/* Try to find an ENGINE which implements this method */
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if (e) {
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if (!ENGINE_init(e)) {
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EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
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return NULL;
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}
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} else
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e = ENGINE_get_pkey_meth_engine(id);
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/*
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* If an ENGINE handled this method look it up. Othewise use internal
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* tables.
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*/
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if (e)
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pmeth = ENGINE_get_pkey_meth(e, id);
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else
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#endif
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pmeth = EVP_PKEY_meth_find(id);
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if (pmeth == NULL) {
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EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
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return NULL;
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}
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ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
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if (!ret) {
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#ifndef OPENSSL_NO_ENGINE
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if (e)
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ENGINE_finish(e);
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#endif
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EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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ret->engine = e;
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ret->pmeth = pmeth;
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ret->operation = EVP_PKEY_OP_UNDEFINED;
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ret->pkey = pkey;
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ret->peerkey = NULL;
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ret->pkey_gencb = 0;
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if (pkey)
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CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
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ret->data = NULL;
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if (pmeth->init) {
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if (pmeth->init(ret) <= 0) {
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EVP_PKEY_CTX_free(ret);
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return NULL;
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}
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}
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return ret;
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}
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EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
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{
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EVP_PKEY_METHOD *pmeth;
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pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
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if (!pmeth)
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return NULL;
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memset(pmeth, 0, sizeof(EVP_PKEY_METHOD));
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pmeth->pkey_id = id;
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pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
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pmeth->init = 0;
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pmeth->copy = 0;
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pmeth->cleanup = 0;
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pmeth->paramgen_init = 0;
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pmeth->paramgen = 0;
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pmeth->keygen_init = 0;
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pmeth->keygen = 0;
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pmeth->sign_init = 0;
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pmeth->sign = 0;
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pmeth->verify_init = 0;
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pmeth->verify = 0;
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pmeth->verify_recover_init = 0;
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pmeth->verify_recover = 0;
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pmeth->signctx_init = 0;
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pmeth->signctx = 0;
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pmeth->verifyctx_init = 0;
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pmeth->verifyctx = 0;
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pmeth->encrypt_init = 0;
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pmeth->encrypt = 0;
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pmeth->decrypt_init = 0;
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pmeth->decrypt = 0;
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pmeth->derive_init = 0;
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pmeth->derive = 0;
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pmeth->ctrl = 0;
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pmeth->ctrl_str = 0;
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return pmeth;
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}
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void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
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const EVP_PKEY_METHOD *meth)
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{
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if (ppkey_id)
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*ppkey_id = meth->pkey_id;
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if (pflags)
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*pflags = meth->flags;
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}
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void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
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{
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dst->init = src->init;
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dst->copy = src->copy;
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dst->cleanup = src->cleanup;
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dst->paramgen_init = src->paramgen_init;
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dst->paramgen = src->paramgen;
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dst->keygen_init = src->keygen_init;
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dst->keygen = src->keygen;
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dst->sign_init = src->sign_init;
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dst->sign = src->sign;
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dst->verify_init = src->verify_init;
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dst->verify = src->verify;
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dst->verify_recover_init = src->verify_recover_init;
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dst->verify_recover = src->verify_recover;
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dst->signctx_init = src->signctx_init;
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dst->signctx = src->signctx;
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dst->verifyctx_init = src->verifyctx_init;
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dst->verifyctx = src->verifyctx;
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dst->encrypt_init = src->encrypt_init;
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dst->encrypt = src->encrypt;
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dst->decrypt_init = src->decrypt_init;
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dst->decrypt = src->decrypt;
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dst->derive_init = src->derive_init;
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dst->derive = src->derive;
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dst->ctrl = src->ctrl;
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dst->ctrl_str = src->ctrl_str;
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}
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void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
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{
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if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
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OPENSSL_free(pmeth);
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}
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EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
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{
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return int_ctx_new(pkey, e, -1);
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}
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EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
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{
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return int_ctx_new(NULL, e, id);
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}
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EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
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{
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EVP_PKEY_CTX *rctx;
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if (!pctx->pmeth || !pctx->pmeth->copy)
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return NULL;
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#ifndef OPENSSL_NO_ENGINE
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/* Make sure it's safe to copy a pkey context using an ENGINE */
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if (pctx->engine && !ENGINE_init(pctx->engine)) {
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EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
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return 0;
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}
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#endif
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rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
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if (!rctx)
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return NULL;
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rctx->pmeth = pctx->pmeth;
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#ifndef OPENSSL_NO_ENGINE
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rctx->engine = pctx->engine;
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#endif
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if (pctx->pkey)
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CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
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rctx->pkey = pctx->pkey;
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if (pctx->peerkey)
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CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
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rctx->peerkey = pctx->peerkey;
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rctx->data = NULL;
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rctx->app_data = NULL;
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rctx->operation = pctx->operation;
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if (pctx->pmeth->copy(rctx, pctx) > 0)
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return rctx;
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EVP_PKEY_CTX_free(rctx);
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return NULL;
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}
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int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
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{
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if (app_pkey_methods == NULL) {
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app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
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if (!app_pkey_methods)
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return 0;
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}
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if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
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return 0;
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sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
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return 1;
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}
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void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
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{
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if (ctx == NULL)
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return;
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if (ctx->pmeth && ctx->pmeth->cleanup)
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ctx->pmeth->cleanup(ctx);
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if (ctx->pkey)
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EVP_PKEY_free(ctx->pkey);
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if (ctx->peerkey)
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EVP_PKEY_free(ctx->peerkey);
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#ifndef OPENSSL_NO_ENGINE
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if (ctx->engine)
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/*
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* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
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* functional reference we held for this reason.
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*/
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ENGINE_finish(ctx->engine);
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#endif
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OPENSSL_free(ctx);
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}
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int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
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int cmd, int p1, void *p2)
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{
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int ret;
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if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
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EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
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return -2;
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}
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if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
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return -1;
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if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
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EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
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return -1;
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}
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if ((optype != -1) && !(ctx->operation & optype)) {
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EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
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return -1;
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}
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ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
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if (ret == -2)
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EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
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return ret;
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}
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int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
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const char *name, const char *value)
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{
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if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
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EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
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return -2;
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}
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if (!strcmp(name, "digest")) {
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const EVP_MD *md;
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if (!value || !(md = EVP_get_digestbyname(value))) {
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EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
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return 0;
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}
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return EVP_PKEY_CTX_set_signature_md(ctx, md);
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}
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return ctx->pmeth->ctrl_str(ctx, name, value);
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}
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int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
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{
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return ctx->operation;
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}
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void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
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{
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ctx->keygen_info = dat;
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ctx->keygen_info_count = datlen;
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}
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void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
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{
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ctx->data = data;
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}
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void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
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{
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return ctx->data;
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}
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EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
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{
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return ctx->pkey;
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}
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EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
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{
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return ctx->peerkey;
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}
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void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
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{
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ctx->app_data = data;
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}
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void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
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{
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return ctx->app_data;
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}
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void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
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int (*init) (EVP_PKEY_CTX *ctx))
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{
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pmeth->init = init;
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}
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void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
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int (*copy) (EVP_PKEY_CTX *dst,
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EVP_PKEY_CTX *src))
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{
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pmeth->copy = copy;
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}
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void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
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void (*cleanup) (EVP_PKEY_CTX *ctx))
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{
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pmeth->cleanup = cleanup;
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}
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void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
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int (*paramgen_init) (EVP_PKEY_CTX *ctx),
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int (*paramgen) (EVP_PKEY_CTX *ctx,
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EVP_PKEY *pkey))
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{
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pmeth->paramgen_init = paramgen_init;
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pmeth->paramgen = paramgen;
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}
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void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
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int (*keygen_init) (EVP_PKEY_CTX *ctx),
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int (*keygen) (EVP_PKEY_CTX *ctx,
|
|
EVP_PKEY *pkey))
|
|
{
|
|
pmeth->keygen_init = keygen_init;
|
|
pmeth->keygen = keygen;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
|
|
int (*sign_init) (EVP_PKEY_CTX *ctx),
|
|
int (*sign) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *sig, size_t *siglen,
|
|
const unsigned char *tbs,
|
|
size_t tbslen))
|
|
{
|
|
pmeth->sign_init = sign_init;
|
|
pmeth->sign = sign;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
|
|
int (*verify_init) (EVP_PKEY_CTX *ctx),
|
|
int (*verify) (EVP_PKEY_CTX *ctx,
|
|
const unsigned char *sig,
|
|
size_t siglen,
|
|
const unsigned char *tbs,
|
|
size_t tbslen))
|
|
{
|
|
pmeth->verify_init = verify_init;
|
|
pmeth->verify = verify;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
|
|
int (*verify_recover_init) (EVP_PKEY_CTX
|
|
*ctx),
|
|
int (*verify_recover) (EVP_PKEY_CTX
|
|
*ctx,
|
|
unsigned char
|
|
*sig,
|
|
size_t *siglen,
|
|
const unsigned
|
|
char *tbs,
|
|
size_t tbslen))
|
|
{
|
|
pmeth->verify_recover_init = verify_recover_init;
|
|
pmeth->verify_recover = verify_recover;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
|
|
int (*signctx_init) (EVP_PKEY_CTX *ctx,
|
|
EVP_MD_CTX *mctx),
|
|
int (*signctx) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *sig,
|
|
size_t *siglen,
|
|
EVP_MD_CTX *mctx))
|
|
{
|
|
pmeth->signctx_init = signctx_init;
|
|
pmeth->signctx = signctx;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
|
|
int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
|
|
EVP_MD_CTX *mctx),
|
|
int (*verifyctx) (EVP_PKEY_CTX *ctx,
|
|
const unsigned char *sig,
|
|
int siglen,
|
|
EVP_MD_CTX *mctx))
|
|
{
|
|
pmeth->verifyctx_init = verifyctx_init;
|
|
pmeth->verifyctx = verifyctx;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
|
|
int (*encrypt_init) (EVP_PKEY_CTX *ctx),
|
|
int (*encryptfn) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *out,
|
|
size_t *outlen,
|
|
const unsigned char *in,
|
|
size_t inlen))
|
|
{
|
|
pmeth->encrypt_init = encrypt_init;
|
|
pmeth->encrypt = encryptfn;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
|
|
int (*decrypt_init) (EVP_PKEY_CTX *ctx),
|
|
int (*decrypt) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *out,
|
|
size_t *outlen,
|
|
const unsigned char *in,
|
|
size_t inlen))
|
|
{
|
|
pmeth->decrypt_init = decrypt_init;
|
|
pmeth->decrypt = decrypt;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
|
|
int (*derive_init) (EVP_PKEY_CTX *ctx),
|
|
int (*derive) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *key,
|
|
size_t *keylen))
|
|
{
|
|
pmeth->derive_init = derive_init;
|
|
pmeth->derive = derive;
|
|
}
|
|
|
|
void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
|
|
int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
|
|
void *p2),
|
|
int (*ctrl_str) (EVP_PKEY_CTX *ctx,
|
|
const char *type,
|
|
const char *value))
|
|
{
|
|
pmeth->ctrl = ctrl;
|
|
pmeth->ctrl_str = ctrl_str;
|
|
}
|