EVP & TLS: Add necessary EC_KEY data extraction functions, and use them

libssl code uses EVP_PKEY_get0_EC_KEY() to extract certain basic data
from the EC_KEY.  We replace that with internal EVP_PKEY functions.

This may or may not be refactored later on.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11358)

1 files changed, 23 insertions, 0 deletions

diff --git a/include/internal/evp.h b/include/internal/evp.h
new file mode 100644
index 0000000000..404e48322c
--- /dev/null
+++ b/include/internal/evp.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (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
+ */
+
+#ifndef OSSL_INTERNAL_EVP_H
+# define OSSL_INTERNAL_EVP_H
+
+# include <openssl/evp.h>
+
+# ifndef OPENSSL_NO_EC
+/*
+ * TODO(3.0) While waiting for more generic getters, we have these functions
+ * as an interim solution.  This should be removed when the generic getters
+ * appear.
+ */
+int evp_pkey_get_EC_KEY_curve_nid(const EVP_PKEY *pkey);
+# endif
+#endif