mirror of https://github.com/kubernetes/kops.git
58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
//go:build !windows
|
|
|
|
// Copyright (c) 2019, Google LLC All rights reserved.
|
|
//
|
|
// 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 tpm2
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/google/go-tpm/tpmutil"
|
|
)
|
|
|
|
// OpenTPM opens a channel to the TPM at the given path. If the file is a
|
|
// device, then it treats it like a normal TPM device, and if the file is a
|
|
// Unix domain socket, then it opens a connection to the socket.
|
|
//
|
|
// This function may also be invoked with no paths, as tpm2.OpenTPM(). In this
|
|
// case, the default paths on Linux (/dev/tpmrm0 then /dev/tpm0), will be used.
|
|
func OpenTPM(path ...string) (tpm io.ReadWriteCloser, err error) {
|
|
switch len(path) {
|
|
case 0:
|
|
tpm, err = tpmutil.OpenTPM("/dev/tpmrm0")
|
|
if errors.Is(err, os.ErrNotExist) {
|
|
tpm, err = tpmutil.OpenTPM("/dev/tpm0")
|
|
}
|
|
case 1:
|
|
tpm, err = tpmutil.OpenTPM(path[0])
|
|
default:
|
|
return nil, errors.New("cannot specify multiple paths to tpm2.OpenTPM")
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Make sure this is a TPM 2.0
|
|
_, err = GetManufacturer(tpm)
|
|
if err != nil {
|
|
tpm.Close()
|
|
return nil, fmt.Errorf("open %s: device is not a TPM 2.0", path)
|
|
}
|
|
return tpm, nil
|
|
}
|