mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-18 04:10:22 +00:00
54 lines
1.6 KiB
Go
54 lines
1.6 KiB
Go
|
// Copyright 2011 Google Inc. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package uuid
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/md5"
|
||
|
|
"crypto/sha1"
|
||
|
|
"hash"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Well known Name Space IDs and UUIDs
|
||
|
|
var (
|
||
|
|
NameSpace_DNS = Parse("6ba7b810-9dad-11d1-80b4-00c04fd430c8")
|
||
|
|
NameSpace_URL = Parse("6ba7b811-9dad-11d1-80b4-00c04fd430c8")
|
||
|
|
NameSpace_OID = Parse("6ba7b812-9dad-11d1-80b4-00c04fd430c8")
|
||
|
|
NameSpace_X500 = Parse("6ba7b814-9dad-11d1-80b4-00c04fd430c8")
|
||
|
|
NIL = Parse("00000000-0000-0000-0000-000000000000")
|
||
|
|
)
|
||
|
|
|
||
|
|
// NewHash returns a new UUID derived from the hash of space concatenated with
|
||
|
|
// data generated by h. The hash should be at least 16 byte in length. The
|
||
|
|
// first 16 bytes of the hash are used to form the UUID. The version of the
|
||
|
|
// UUID will be the lower 4 bits of version. NewHash is used to implement
|
||
|
|
// NewMD5 and NewSHA1.
|
||
|
|
func NewHash(h hash.Hash, space UUID, data []byte, version int) UUID {
|
||
|
|
h.Reset()
|
||
|
|
h.Write(space)
|
||
|
|
h.Write([]byte(data))
|
||
|
|
s := h.Sum(nil)
|
||
|
|
uuid := make([]byte, 16)
|
||
|
|
copy(uuid, s)
|
||
|
|
uuid[6] = (uuid[6] & 0x0f) | uint8((version&0xf)<<4)
|
||
|
|
uuid[8] = (uuid[8] & 0x3f) | 0x80 // RFC 4122 variant
|
||
|
|
return uuid
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewMD5 returns a new MD5 (Version 3) UUID based on the
|
||
|
|
// supplied name space and data.
|
||
|
|
//
|
||
|
|
// NewHash(md5.New(), space, data, 3)
|
||
|
|
func NewMD5(space UUID, data []byte) UUID {
|
||
|
|
return NewHash(md5.New(), space, data, 3)
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewSHA1 returns a new SHA1 (Version 5) UUID based on the
|
||
|
|
// supplied name space and data.
|
||
|
|
//
|
||
|
|
// NewHash(sha1.New(), space, data, 5)
|
||
|
|
func NewSHA1(space UUID, data []byte) UUID {
|
||
|
|
return NewHash(sha1.New(), space, data, 5)
|
||
|
|
}
|