ducky/devices
2015-11-12
Parent:b6494e1a499e
ducky/devices/vendor/code.google.com/p/go-uuid/uuid/hash.go
Start testing our Storers. Set up a file to start testing our Storer implementations, and write a sample test for the happy path of GetDevices--e.g., we expect no errors. This also required us to setup a helper to compare two Device instances and see if they're equal or not, and if not, how they differ. In the future, we'll keep adding test methods to test more logical paths for the interface contract, and to test more of the methods for the interface.
| 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 "crypto/md5" |
| paddy@0 | 9 "crypto/sha1" |
| paddy@0 | 10 "hash" |
| paddy@0 | 11 ) |
| paddy@0 | 12 |
| paddy@0 | 13 // Well known Name Space IDs and UUIDs |
| paddy@0 | 14 var ( |
| paddy@0 | 15 NameSpace_DNS = Parse("6ba7b810-9dad-11d1-80b4-00c04fd430c8") |
| paddy@0 | 16 NameSpace_URL = Parse("6ba7b811-9dad-11d1-80b4-00c04fd430c8") |
| paddy@0 | 17 NameSpace_OID = Parse("6ba7b812-9dad-11d1-80b4-00c04fd430c8") |
| paddy@0 | 18 NameSpace_X500 = Parse("6ba7b814-9dad-11d1-80b4-00c04fd430c8") |
| paddy@0 | 19 NIL = Parse("00000000-0000-0000-0000-000000000000") |
| paddy@0 | 20 ) |
| paddy@0 | 21 |
| paddy@0 | 22 // NewHash returns a new UUID dervied from the hash of space concatenated with |
| paddy@0 | 23 // data generated by h. The hash should be at least 16 byte in length. The |
| paddy@0 | 24 // first 16 bytes of the hash are used to form the UUID. The version of the |
| paddy@0 | 25 // UUID will be the lower 4 bits of version. NewHash is used to implement |
| paddy@0 | 26 // NewMD5 and NewSHA1. |
| paddy@0 | 27 func NewHash(h hash.Hash, space UUID, data []byte, version int) UUID { |
| paddy@0 | 28 h.Reset() |
| paddy@0 | 29 h.Write(space) |
| paddy@0 | 30 h.Write([]byte(data)) |
| paddy@0 | 31 s := h.Sum(nil) |
| paddy@0 | 32 uuid := make([]byte, 16) |
| paddy@0 | 33 copy(uuid, s) |
| paddy@0 | 34 uuid[6] = (uuid[6] & 0x0f) | uint8((version&0xf)<<4) |
| paddy@0 | 35 uuid[8] = (uuid[8] & 0x3f) | 0x80 // RFC 4122 variant |
| paddy@0 | 36 return uuid |
| paddy@0 | 37 } |
| paddy@0 | 38 |
| paddy@0 | 39 // NewMD5 returns a new MD5 (Version 3) UUID based on the |
| paddy@0 | 40 // supplied name space and data. |
| paddy@0 | 41 // |
| paddy@0 | 42 // NewHash(md5.New(), space, data, 3) |
| paddy@0 | 43 func NewMD5(space UUID, data []byte) UUID { |
| paddy@0 | 44 return NewHash(md5.New(), space, data, 3) |
| paddy@0 | 45 } |
| paddy@0 | 46 |
| paddy@0 | 47 // NewSHA1 returns a new SHA1 (Version 5) UUID based on the |
| paddy@0 | 48 // supplied name space and data. |
| paddy@0 | 49 // |
| paddy@0 | 50 // NewHash(sha1.New(), space, data, 5) |
| paddy@0 | 51 func NewSHA1(space UUID, data []byte) UUID { |
| paddy@0 | 52 return NewHash(sha1.New(), space, data, 5) |
| paddy@0 | 53 } |