1 // Copyright The OpenTelemetry Authors 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 //go:build windows 16 // +build windows 17 18 package resource // import "go.opentelemetry.io/otel/sdk/resource" 19 20 import ( 21 "golang.org/x/sys/windows/registry" 22 ) 23 24 // implements hostIDReader 25 type hostIDReaderWindows struct{} 26 27 // read reads MachineGuid from the windows registry key: 28 // SOFTWARE\Microsoft\Cryptography 29 func (*hostIDReaderWindows) read() (string, error) { 30 k, err := registry.OpenKey( 31 registry.LOCAL_MACHINE, `SOFTWARE\Microsoft\Cryptography`, 32 registry.QUERY_VALUE|registry.WOW64_64KEY, 33 ) 34 35 if err != nil { 36 return "", err 37 } 38 defer k.Close() 39 40 guid, _, err := k.GetStringValue("MachineGuid") 41 if err != nil { 42 return "", err 43 } 44 45 return guid, nil 46 } 47 48 var platformHostIDReader hostIDReader = &hostIDReaderWindows{} 49