Support for EC_KEY_METHOD.

Add EC_KEY_METHOD. This is part of the EC revision and will make EC behave
more like other algorithms. Specifically:

EC_KEY_METHOD is part of EC_KEY.
It is part of ENGINE.
Default or key specific implementations can be provided to redirect some
or all operations.

Reviewed-by: Richard Levitte <levitte@openssl.org>

1 files changed, 120 insertions, 0 deletions

diff --git a/crypto/ec/ec_kmeth.c b/crypto/ec/ec_kmeth.c
new file mode 100644
index 0000000000..f0e3fdeadf
--- /dev/null
+++ b/crypto/ec/ec_kmeth.c
@@ -0,0 +1,120 @@
+/* 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/)"
+ *
+ * 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.
+ * ====================================================================
+ */
+
+#include <openssl/ec.h>
+#include <openssl/engine.h>
+#include <openssl/err.h>
+#include "ec_lcl.h"
+
+
+static const EC_KEY_METHOD openssl_ec_key_method = {
+    "OpenSSL EC_KEY method",
+    0
+};
+
+const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
+
+const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
+{
+    return &openssl_ec_key_method;
+}
+
+const EC_KEY_METHOD *EC_KEY_get_default_method(void)
+{
+    return default_ec_key_meth;
+}
+
+void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
+{
+    if (meth == NULL)
+        default_ec_key_meth = &openssl_ec_key_method;
+    else
+        default_ec_key_meth = meth;
+}
+
+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);
+    }
+    ret->meth = EC_KEY_get_default_method();
+#ifndef OPENSSL_NO_ENGINE
+    if (engine) {
+        if (!ENGINE_init(engine)) {
+            ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
+            OPENSSL_free(ret);
+            return NULL;
+        }
+        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) {
+            ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
+            ENGINE_finish(ret->engine);
+            OPENSSL_free(ret);
+            return NULL;
+        }
+    }
+#endif
+
+    ret->version = 1;
+    ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
+    ret->references = 1;
+    return (ret);
+}