github.com/mre-fog/trillianxx@v1.1.2-0.20180615153820-ae375a99d36a/cmd/createtree/pem.go (about)

     1  // Copyright 2017 Google Inc. All Rights Reserved.
     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  
    15  package main
    16  
    17  import (
    18  	"errors"
    19  	"flag"
    20  	"fmt"
    21  
    22  	"github.com/golang/protobuf/proto"
    23  	"github.com/google/trillian/cmd/createtree/keys"
    24  	"github.com/google/trillian/crypto/keys/der"
    25  	"github.com/google/trillian/crypto/keys/pem"
    26  	"github.com/google/trillian/crypto/keyspb"
    27  )
    28  
    29  var (
    30  	pemKeyPath = flag.String("pem_key_path", "", "Path to the private key PEM file")
    31  	pemKeyPass = flag.String("pem_key_password", "", "Password of the private key PEM file")
    32  )
    33  
    34  func init() {
    35  	keys.RegisterType("PEMKeyFile", pemKeyFileProtoFromFlags)
    36  	keys.RegisterType("PrivateKey", privateKeyProtoFromFlags)
    37  }
    38  
    39  func pemKeyFileProtoFromFlags() (proto.Message, error) {
    40  	if *pemKeyPath == "" {
    41  		return nil, errors.New("empty pem_key_path")
    42  	}
    43  	if *pemKeyPass == "" {
    44  		return nil, fmt.Errorf("empty password for PEM key file %q", *pemKeyPath)
    45  	}
    46  
    47  	return &keyspb.PEMKeyFile{
    48  		Path:     *pemKeyPath,
    49  		Password: *pemKeyPass,
    50  	}, nil
    51  }
    52  
    53  func privateKeyProtoFromFlags() (proto.Message, error) {
    54  	if *pemKeyPath == "" {
    55  		return nil, errors.New("empty pem_key_path")
    56  	}
    57  
    58  	key, err := pem.ReadPrivateKeyFile(*pemKeyPath, *pemKeyPass)
    59  	if err != nil {
    60  		return nil, fmt.Errorf("error reading reading private key file: %v", err)
    61  	}
    62  
    63  	keyDER, err := der.MarshalPrivateKey(key)
    64  	if err != nil {
    65  		return nil, fmt.Errorf("error marshaling private key as DER: %v", err)
    66  	}
    67  
    68  	return &keyspb.PrivateKey{Der: keyDER}, nil
    69  }