ducky/devices
2015-12-19
Parent:a700ede02f91
ducky/devices/vendor/github.com/pborman/uuid/hash.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.
1 // Copyright 2011 Google Inc. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 package uuid
7 import (
8 "crypto/md5"
9 "crypto/sha1"
10 "hash"
11 )
13 // Well known Name Space IDs and UUIDs
14 var (
15 NameSpace_DNS = Parse("6ba7b810-9dad-11d1-80b4-00c04fd430c8")
16 NameSpace_URL = Parse("6ba7b811-9dad-11d1-80b4-00c04fd430c8")
17 NameSpace_OID = Parse("6ba7b812-9dad-11d1-80b4-00c04fd430c8")
18 NameSpace_X500 = Parse("6ba7b814-9dad-11d1-80b4-00c04fd430c8")
19 NIL = Parse("00000000-0000-0000-0000-000000000000")
20 )
22 // NewHash returns a new UUID dervied from the hash of space concatenated with
23 // data generated by h. The hash should be at least 16 byte in length. The
24 // first 16 bytes of the hash are used to form the UUID. The version of the
25 // UUID will be the lower 4 bits of version. NewHash is used to implement
26 // NewMD5 and NewSHA1.
27 func NewHash(h hash.Hash, space UUID, data []byte, version int) UUID {
28 h.Reset()
29 h.Write(space)
30 h.Write([]byte(data))
31 s := h.Sum(nil)
32 uuid := make([]byte, 16)
33 copy(uuid, s)
34 uuid[6] = (uuid[6] & 0x0f) | uint8((version&0xf)<<4)
35 uuid[8] = (uuid[8] & 0x3f) | 0x80 // RFC 4122 variant
36 return uuid
37 }
39 // NewMD5 returns a new MD5 (Version 3) UUID based on the
40 // supplied name space and data.
41 //
42 // NewHash(md5.New(), space, data, 3)
43 func NewMD5(space UUID, data []byte) UUID {
44 return NewHash(md5.New(), space, data, 3)
45 }
47 // NewSHA1 returns a new SHA1 (Version 5) UUID based on the
48 // supplied name space and data.
49 //
50 // NewHash(sha1.New(), space, data, 5)
51 func NewSHA1(space UUID, data []byte) UUID {
52 return NewHash(sha1.New(), space, data, 5)
53 }