ducky/devices

Paddy 2015-12-19 Parent:a700ede02f91

17:ad63b888f899 Go to Latest

ducky/devices/vendor/github.com/pborman/uuid/dce.go

Fix JSON pointers in errors when creating devices. Our JSON pointers used to point at the root of the document, but the properties were actually in objects in an array keyed off of "devices", so we had to update the field property of our errors to match. While we were in there, we fixed the "insufficient" error for a Device's name to be "missing" when the name is an empty string. So far, the only way for a Device's name for it to be insufficient is _for it to be the empty string_, but if in the future we raise the minimum length of the Device name, there will be a distinction and I'd like the code to recognise it.

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paddy@0 1 // Copyright 2011 Google Inc. All rights reserved.
paddy@0 2 // Use of this source code is governed by a BSD-style
paddy@0 3 // license that can be found in the LICENSE file.
paddy@0 4
paddy@0 5 package uuid
paddy@0 6
paddy@0 7 import (
paddy@0 8 "encoding/binary"
paddy@0 9 "fmt"
paddy@0 10 "os"
paddy@0 11 )
paddy@0 12
paddy@0 13 // A Domain represents a Version 2 domain
paddy@0 14 type Domain byte
paddy@0 15
paddy@0 16 // Domain constants for DCE Security (Version 2) UUIDs.
paddy@0 17 const (
paddy@0 18 Person = Domain(0)
paddy@0 19 Group = Domain(1)
paddy@0 20 Org = Domain(2)
paddy@0 21 )
paddy@0 22
paddy@0 23 // NewDCESecurity returns a DCE Security (Version 2) UUID.
paddy@0 24 //
paddy@0 25 // The domain should be one of Person, Group or Org.
paddy@0 26 // On a POSIX system the id should be the users UID for the Person
paddy@0 27 // domain and the users GID for the Group. The meaning of id for
paddy@0 28 // the domain Org or on non-POSIX systems is site defined.
paddy@0 29 //
paddy@0 30 // For a given domain/id pair the same token may be returned for up to
paddy@0 31 // 7 minutes and 10 seconds.
paddy@0 32 func NewDCESecurity(domain Domain, id uint32) UUID {
paddy@0 33 uuid := NewUUID()
paddy@0 34 if uuid != nil {
paddy@0 35 uuid[6] = (uuid[6] & 0x0f) | 0x20 // Version 2
paddy@0 36 uuid[9] = byte(domain)
paddy@0 37 binary.BigEndian.PutUint32(uuid[0:], id)
paddy@0 38 }
paddy@0 39 return uuid
paddy@0 40 }
paddy@0 41
paddy@0 42 // NewDCEPerson returns a DCE Security (Version 2) UUID in the person
paddy@0 43 // domain with the id returned by os.Getuid.
paddy@0 44 //
paddy@0 45 // NewDCEPerson(Person, uint32(os.Getuid()))
paddy@0 46 func NewDCEPerson() UUID {
paddy@0 47 return NewDCESecurity(Person, uint32(os.Getuid()))
paddy@0 48 }
paddy@0 49
paddy@0 50 // NewDCEGroup returns a DCE Security (Version 2) UUID in the group
paddy@0 51 // domain with the id returned by os.Getgid.
paddy@0 52 //
paddy@0 53 // NewDCEGroup(Group, uint32(os.Getgid()))
paddy@0 54 func NewDCEGroup() UUID {
paddy@0 55 return NewDCESecurity(Group, uint32(os.Getgid()))
paddy@0 56 }
paddy@0 57
paddy@0 58 // Domain returns the domain for a Version 2 UUID or false.
paddy@0 59 func (uuid UUID) Domain() (Domain, bool) {
paddy@0 60 if v, _ := uuid.Version(); v != 2 {
paddy@0 61 return 0, false
paddy@0 62 }
paddy@0 63 return Domain(uuid[9]), true
paddy@0 64 }
paddy@0 65
paddy@0 66 // Id returns the id for a Version 2 UUID or false.
paddy@0 67 func (uuid UUID) Id() (uint32, bool) {
paddy@0 68 if v, _ := uuid.Version(); v != 2 {
paddy@0 69 return 0, false
paddy@0 70 }
paddy@0 71 return binary.BigEndian.Uint32(uuid[0:4]), true
paddy@0 72 }
paddy@0 73
paddy@0 74 func (d Domain) String() string {
paddy@0 75 switch d {
paddy@0 76 case Person:
paddy@0 77 return "Person"
paddy@0 78 case Group:
paddy@0 79 return "Group"
paddy@0 80 case Org:
paddy@0 81 return "Org"
paddy@0 82 }
paddy@0 83 return fmt.Sprintf("Domain%d", int(d))
paddy@0 84 }