github.com/letsencrypt/trillian@v1.1.2-0.20180615153820-ae375a99d36a/crypto/keys/pkcs11/proto/register.go (about)

     1  // +build pkcs11
     2  
     3  // Copyright 2017 Google Inc. All Rights Reserved.
     4  //
     5  // Licensed under the Apache License, Version 2.0 (the "License");
     6  // you may not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  package proto
    18  
    19  import (
    20  	"context"
    21  	"crypto"
    22  	"flag"
    23  	"fmt"
    24  
    25  	"github.com/golang/protobuf/proto"
    26  	"github.com/google/trillian/crypto/keys"
    27  	"github.com/google/trillian/crypto/keys/pkcs11"
    28  	"github.com/google/trillian/crypto/keyspb"
    29  )
    30  
    31  var modulePath = flag.String("pkcs11_module_path", "", "Path to the PKCS#11 module to use for keys that use the PKCS#11 interface")
    32  
    33  func init() {
    34  	keys.RegisterHandler(&keyspb.PKCS11Config{}, func(ctx context.Context, pb proto.Message) (crypto.Signer, error) {
    35  		if cfg, ok := pb.(*keyspb.PKCS11Config); ok {
    36  			return pkcs11.FromConfig(*modulePath, cfg)
    37  		}
    38  		return nil, fmt.Errorf("pkcs11: got %T, want *keyspb.PKCS11Config", pb)
    39  	})
    40  }