chore: checkpoint before Python removal

vendor/aws-lc-sys/aws-lc/include/openssl/engine.h

@@ -0,0 +1,82 @@
+// Copyright (c) 2014, Google Inc.
+// SPDX-License-Identifier: ISC
+
+#ifndef OPENSSL_HEADER_ENGINE_H
+#define OPENSSL_HEADER_ENGINE_H
+
+#include <openssl/base.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+// Engines are collections of methods. Methods are tables of function pointers,
+// defined for certain algorithms, that allow operations on those algorithms to
+// be overridden via a callback. This can be used, for example, to implement an
+// RSA* that forwards operations to a hardware module.
+//
+// Default Methods are zero initialized. You should set the function pointers
+// that you wish before setting it on an |ENGINE|. Any functions pointers that
+// are NULL indicate that the default behaviour should be used.
+
+
+// Allocation and destruction.
+
+// ENGINE_new returns an empty ENGINE that uses the default method for all
+// algorithms.
+OPENSSL_EXPORT ENGINE *ENGINE_new(void);
+
+// ENGINE_free decrements the reference counts for all methods linked from
+// |engine| and frees |engine| itself. It returns one.
+OPENSSL_EXPORT int ENGINE_free(ENGINE *engine);
+
+
+// Method accessors.
+//
+// The setter functions do not take ownership of the |method| pointer. The
+// consumer must free the |method| pointer after all objects referencing it are
+// freed.
+
+// ENGINE_set_RSA takes a |method| pointer and sets it on the |ENGINE| object.
+// Returns one on success and zero for failure when |engine| is NULL.
+OPENSSL_EXPORT int ENGINE_set_RSA(ENGINE *engine, const RSA_METHOD *method);
+
+// ENGINE_get_RSA returns the meth field of |engine|. If |engine| is NULL,
+// function returns NULL.
+OPENSSL_EXPORT const RSA_METHOD *ENGINE_get_RSA(const ENGINE *engine);
+
+// ENGINE_set_EC takes a |method| pointer and sets it on the |ENGINE| object.
+// Returns one on success and zero for failure when |engine| is NULL.
+OPENSSL_EXPORT int ENGINE_set_EC(ENGINE *engine, const EC_KEY_METHOD *method);
+
+// ENGINE_get_EC returns the meth field of |engine|. If |engine| is NULL,
+// function returns NULL.
+OPENSSL_EXPORT const EC_KEY_METHOD *ENGINE_get_EC(const ENGINE *engine);
+
+
+// Deprecated functions.
+
+// ENGINE_cleanup does nothing. This has been deprecated since OpenSSL 1.1.0 and
+// applications should not rely on it.
+OPENSSL_EXPORT void ENGINE_cleanup(void);
+
+
+#if defined(__cplusplus)
+}  // extern C
+
+extern "C++" {
+
+BSSL_NAMESPACE_BEGIN
+
+BORINGSSL_MAKE_DELETER(ENGINE, ENGINE_free)
+
+BSSL_NAMESPACE_END
+
+}  // extern C++
+
+#endif
+
+#define ENGINE_R_OPERATION_NOT_SUPPORTED 100
+
+#endif  // OPENSSL_HEADER_ENGINE_H