Replace the Auth and Auth::TLS singletons

Use a builder pattern for creation and validation, in a manner that
allows also other authentication methods to be added in the future
besides the current TLS/SSL.

The main Auth instances are built early and then passed by not_null
const pointers, to avoid passing temporaries, replacing the previous
Auth::TLS instances passed by simple nullable const pointers. Where
needed, these passed Auth instances are also stored, by const ref.

Tests also build Auth instances as needed, either with the default
'no certification' or from the test environment arguments.

1 files changed, 50 insertions, 0 deletions

diff --git a/test/utils/remote_execution/test_auth_config.hpp b/test/utils/remote_execution/test_auth_config.hpp
new file mode 100644
index 00000000..fd157f22
--- /dev/null
+++ b/test/utils/remote_execution/test_auth_config.hpp
@@ -0,0 +1,50 @@
+// Copyright 2024 Huawei Cloud Computing Technology Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef INCLUDED_SRC_TEST_UTILS_REMOTE_EXECUTION_TEST_AUTH_CONFIG_HPP
+#define INCLUDED_SRC_TEST_UTILS_REMOTE_EXECUTION_TEST_AUTH_CONFIG_HPP
+
+#include <optional>
+#include <string>
+#include <variant>
+
+#include "src/buildtool/auth/authentication.hpp"
+#include "src/buildtool/logging/log_level.hpp"
+#include "src/buildtool/logging/logger.hpp"
+#include "test/utils/test_env.hpp"
+
+class TestAuthConfig final {
+  public:
+    [[nodiscard]] static auto ReadAuthConfigFromEnvironment() noexcept
+        -> std::optional<Auth> {
+        Auth::TLS::Builder tls_builder;
+        auto config = tls_builder.SetCACertificate(ReadTLSAuthCACertFromEnv())
+                          .SetClientCertificate(ReadTLSAuthClientCertFromEnv())
+                          .SetClientKey(ReadTLSAuthClientKeyFromEnv())
+                          .Build();
+
+        if (config) {
+            if (*config) {
+                // correctly configured TLS/SSL certification
+                return *std::move(*config);
+            }
+            // given TLS certificates are invalid
+            Logger::Log(LogLevel::Error, config->error());
+            return std::nullopt;
+        }
+        return Auth{};  // no TLS certificates provided
+    }
+};
+
+#endif  // INCLUDED_SRC_TEST_UTILS_REMOTE_EXECUTION_TEST_AUTH_CONFIG_HPP