github.com/uber/kraken@v0.1.4/tools/lib/tlsutil.go (about)

     1  // Copyright (c) 2016-2019 Uber Technologies, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package lib
    15  
    16  import (
    17  	"crypto/tls"
    18  	"fmt"
    19  	"io/ioutil"
    20  
    21  	"github.com/uber/kraken/utils/httputil"
    22  
    23  	"gopkg.in/yaml.v2"
    24  )
    25  
    26  // ReadTLSFile reads config file in path and returns *tls.Config.
    27  // It returns nil when path is nil.
    28  func ReadTLSFile(path *string) (*tls.Config, error) {
    29  	if path == nil {
    30  		return nil, nil
    31  	}
    32  	data, err := ioutil.ReadFile(*path)
    33  	if err != nil {
    34  		return nil, fmt.Errorf("read tls config: %s", err)
    35  	}
    36  	var config httputil.TLSConfig
    37  	if err := yaml.Unmarshal(data, &config); err != nil {
    38  		return nil, fmt.Errorf("unmarshal tls config: %s", err)
    39  	}
    40  	tls, err := config.BuildClient()
    41  	if err != nil {
    42  		return nil, fmt.Errorf("build tls client: %s", err)
    43  	}
    44  	return tls, nil
    45  }