-/* crypto/ec/ec_kmeth.c */
/*
- * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project.
- */
-/* ====================================================================
- * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
*
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
+#include <string.h>
#include <openssl/ec.h>
#include <openssl/engine.h>
#include <openssl/err.h>
static const EC_KEY_METHOD openssl_ec_key_method = {
"OpenSSL EC_KEY method",
0,
+ 0,0,0,0,0,0,
ossl_ec_key_gen,
- ossl_ecdh_compute_key
+ ossl_ecdh_compute_key,
+ ossl_ecdsa_sign,
+ ossl_ecdsa_sign_setup,
+ ossl_ecdsa_sign_sig,
+ ossl_ecdsa_verify,
+ ossl_ecdsa_verify_sig
};
-const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
+static const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
{
default_ec_key_meth = meth;
}
+const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key)
+{
+ return key->meth;
+}
+
+int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth)
+{
+ void (*finish)(EC_KEY *key) = key->meth->finish;
+
+ if (finish != NULL)
+ finish(key);
+
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_finish(key->engine);
+ key->engine = NULL;
+#endif
+
+ key->meth = meth;
+ if (meth->init != NULL)
+ return meth->init(key);
+ return 1;
+}
+
EC_KEY *EC_KEY_new_method(ENGINE *engine)
{
EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
- return (NULL);
+ return NULL;
+ }
+
+ ret->references = 1;
+ ret->lock = CRYPTO_THREAD_lock_new();
+ if (ret->lock == NULL) {
+ ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
+ OPENSSL_free(ret);
+ return NULL;
}
+
ret->meth = EC_KEY_get_default_method();
#ifndef OPENSSL_NO_ENGINE
- if (engine) {
+ if (engine != NULL) {
if (!ENGINE_init(engine)) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
- OPENSSL_free(ret);
- return NULL;
+ goto err;
}
ret->engine = engine;
} else
- ret->engine = ENGINE_get_default_EC_KEY();
- if (ret->engine) {
- ret->meth = ENGINE_get_EC_KEY(ret->engine);
- if (!ret->meth) {
+ ret->engine = ENGINE_get_default_EC();
+ if (ret->engine != NULL) {
+ ret->meth = ENGINE_get_EC(ret->engine);
+ if (ret->meth == NULL) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
- ENGINE_finish(ret->engine);
- OPENSSL_free(ret);
- return NULL;
+ goto err;
}
}
#endif
ret->version = 1;
ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
- ret->references = 1;
- return (ret);
+
+ if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY, ret, &ret->ex_data)) {
+ goto err;
+ }
+
+ if (ret->meth->init != NULL && ret->meth->init(ret) == 0) {
+ ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_INIT_FAIL);
+ goto err;
+ }
+ return ret;
+
+err:
+ EC_KEY_free(ret);
+ return NULL;
}
int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
- EC_KEY *eckey,
+ const EC_KEY *eckey,
void *(*KDF) (const void *in, size_t inlen, void *out,
size_t *outlen))
{
- if (eckey->meth->compute_key)
- return eckey->meth->compute_key(out, outlen, pub_key, eckey, KDF);
- ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
- return 0;
+ unsigned char *sec = NULL;
+ size_t seclen;
+ if (eckey->meth->compute_key == NULL) {
+ ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
+ return 0;
+ }
+ if (outlen > INT_MAX) {
+ ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_INVALID_OUTPUT_LENGTH);
+ return 0;
+ }
+ if (!eckey->meth->compute_key(&sec, &seclen, pub_key, eckey))
+ return 0;
+ if (KDF != NULL) {
+ KDF(sec, seclen, out, &outlen);
+ } else {
+ if (outlen > seclen)
+ outlen = seclen;
+ memcpy(out, sec, outlen);
+ }
+ OPENSSL_clear_free(sec, seclen);
+ return outlen;
+}
+
+EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth)
+{
+ EC_KEY_METHOD *ret = OPENSSL_zalloc(sizeof(*meth));
+
+ if (ret == NULL)
+ return NULL;
+ if (meth != NULL)
+ *ret = *meth;
+ ret->flags |= EC_KEY_METHOD_DYNAMIC;
+ return ret;
+}
+
+void EC_KEY_METHOD_free(EC_KEY_METHOD *meth)
+{
+ if (meth->flags & EC_KEY_METHOD_DYNAMIC)
+ OPENSSL_free(meth);
+}
+
+void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
+ int (*init)(EC_KEY *key),
+ void (*finish)(EC_KEY *key),
+ int (*copy)(EC_KEY *dest, const EC_KEY *src),
+ int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
+ int (*set_private)(EC_KEY *key,
+ const BIGNUM *priv_key),
+ int (*set_public)(EC_KEY *key,
+ const EC_POINT *pub_key))
+{
+ meth->init = init;
+ meth->finish = finish;
+ meth->copy = copy;
+ meth->set_group = set_group;
+ meth->set_private = set_private;
+ meth->set_public = set_public;
+}
+
+void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
+ int (*keygen)(EC_KEY *key))
+{
+ meth->keygen = keygen;
+}
+
+void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
+ int (*ckey)(unsigned char **psec,
+ size_t *pseclen,
+ const EC_POINT *pub_key,
+ const EC_KEY *ecdh))
+{
+ meth->compute_key = ckey;
+}
+
+void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
+ int (*sign)(int type, const unsigned char *dgst,
+ int dlen, unsigned char *sig,
+ unsigned int *siglen,
+ const BIGNUM *kinv, const BIGNUM *r,
+ EC_KEY *eckey),
+ int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
+ BIGNUM **kinvp, BIGNUM **rp),
+ ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
+ int dgst_len,
+ const BIGNUM *in_kinv,
+ const BIGNUM *in_r,
+ EC_KEY *eckey))
+{
+ meth->sign = sign;
+ meth->sign_setup = sign_setup;
+ meth->sign_sig = sign_sig;
+}
+
+void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
+ int (*verify)(int type, const unsigned
+ char *dgst, int dgst_len,
+ const unsigned char *sigbuf,
+ int sig_len, EC_KEY *eckey),
+ int (*verify_sig)(const unsigned char *dgst,
+ int dgst_len,
+ const ECDSA_SIG *sig,
+ EC_KEY *eckey))
+{
+ meth->verify = verify;
+ meth->verify_sig = verify_sig;
+}
+
+void EC_KEY_METHOD_get_init(EC_KEY_METHOD *meth,
+ int (**pinit)(EC_KEY *key),
+ void (**pfinish)(EC_KEY *key),
+ int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
+ int (**pset_group)(EC_KEY *key,
+ const EC_GROUP *grp),
+ int (**pset_private)(EC_KEY *key,
+ const BIGNUM *priv_key),
+ int (**pset_public)(EC_KEY *key,
+ const EC_POINT *pub_key))
+{
+ if (pinit != NULL)
+ *pinit = meth->init;
+ if (pfinish != NULL)
+ *pfinish = meth->finish;
+ if (pcopy != NULL)
+ *pcopy = meth->copy;
+ if (pset_group != NULL)
+ *pset_group = meth->set_group;
+ if (pset_private != NULL)
+ *pset_private = meth->set_private;
+ if (pset_public != NULL)
+ *pset_public = meth->set_public;
+}
+
+void EC_KEY_METHOD_get_keygen(EC_KEY_METHOD *meth,
+ int (**pkeygen)(EC_KEY *key))
+{
+ if (pkeygen != NULL)
+ *pkeygen = meth->keygen;
+}
+
+void EC_KEY_METHOD_get_compute_key(EC_KEY_METHOD *meth,
+ int (**pck)(unsigned char **pout,
+ size_t *poutlen,
+ const EC_POINT *pub_key,
+ const EC_KEY *ecdh))
+{
+ if (pck != NULL)
+ *pck = meth->compute_key;
+}
+
+void EC_KEY_METHOD_get_sign(EC_KEY_METHOD *meth,
+ int (**psign)(int type, const unsigned char *dgst,
+ int dlen, unsigned char *sig,
+ unsigned int *siglen,
+ const BIGNUM *kinv, const BIGNUM *r,
+ EC_KEY *eckey),
+ int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
+ BIGNUM **kinvp, BIGNUM **rp),
+ ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
+ int dgst_len,
+ const BIGNUM *in_kinv,
+ const BIGNUM *in_r,
+ EC_KEY *eckey))
+{
+ if (psign != NULL)
+ *psign = meth->sign;
+ if (psign_setup != NULL)
+ *psign_setup = meth->sign_setup;
+ if (psign_sig != NULL)
+ *psign_sig = meth->sign_sig;
+}
+
+void EC_KEY_METHOD_get_verify(EC_KEY_METHOD *meth,
+ int (**pverify)(int type, const unsigned
+ char *dgst, int dgst_len,
+ const unsigned char *sigbuf,
+ int sig_len, EC_KEY *eckey),
+ int (**pverify_sig)(const unsigned char *dgst,
+ int dgst_len,
+ const ECDSA_SIG *sig,
+ EC_KEY *eckey))
+{
+ if (pverify != NULL)
+ *pverify = meth->verify;
+ if (pverify_sig != NULL)
+ *pverify_sig = meth->verify_sig;
}
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