github.com/blixtra/rkt@v0.8.1-0.20160204105720-ab0d1add1a43/pkg/tpm/tpm.go (about)

     1  // Copyright 2015 CoreOS, 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  
    15  // +build tpm
    16  
    17  package tpm
    18  
    19  import (
    20  	"time"
    21  
    22  	"github.com/coreos/go-tspi/tpmclient"
    23  )
    24  
    25  // we're connecting to localhost, so 10ms is a reasonable timeout value
    26  const timeout = 10 * time.Millisecond
    27  
    28  // Extend extends the TPM log with the provided string. Returns any error.
    29  func Extend(description string) error {
    30  	connection := tpmclient.New("localhost:12041", timeout)
    31  	err := connection.Extend(15, 0x1000, nil, description)
    32  	return err
    33  }