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certclient.go
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certclient.go
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// Copyright 2020-2021 Buf Technologies, Inc.
//
// 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.
package certclient
import (
"crypto/tls"
"fmt"
"path/filepath"
"strings"
"github.com/bufbuild/buf/internal/pkg/app/appname"
)
// ExternalClientTLSConfig allows users to configure TLS on the client side.
type ExternalClientTLSConfig struct {
Use string `json:"use,omitempty" yaml:"use,omitempty"`
RootCertFilePaths []string `json:"root_cert_file_paths,omitempty" yaml:"root_cert_file_paths,omitempty"`
}
// IsEmpty returns true if the ExternalClientTLSConfig is empty.
func (e ExternalClientTLSConfig) IsEmpty() bool {
return e.Use == "" && len(e.RootCertFilePaths) == 0
}
// NewClientTLSConfig creates a new *tls.Config from the ExternalTLSConfig
//
// The default is to use the system TLS config.
func NewClientTLSConfig(
container appname.Container,
externalClientTLSConfig ExternalClientTLSConfig,
) (*tls.Config, error) {
switch t := strings.ToLower(strings.TrimSpace(externalClientTLSConfig.Use)); t {
case "local":
rootCertFilePaths := externalClientTLSConfig.RootCertFilePaths
if len(rootCertFilePaths) == 0 {
rootCertFilePaths = []string{
filepath.Join(
container.ConfigDirPath(),
"tls",
"root.pem",
),
}
}
return newClientTLSConfigFromRootCertFiles(rootCertFilePaths...)
case "", "system":
return newClientSystemTLSConfig(), nil
case "false":
return nil, nil
default:
return nil, fmt.Errorf("unknown tls.use: %q", t)
}
}