third_party: add github.com/pborman/uuid
Add github.com/pborman/uuid to third_party
Change-Id: I08e2d57c22121ab04883a0a9820b0ac2c10e3274
diff --git a/go/src/github.com/pborman/uuid/CONTRIBUTORS b/go/src/github.com/pborman/uuid/CONTRIBUTORS
new file mode 100644
index 0000000..b382a04
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/CONTRIBUTORS
@@ -0,0 +1 @@
+Paul Borman <borman@google.com>
diff --git a/go/src/github.com/pborman/uuid/LICENSE b/go/src/github.com/pborman/uuid/LICENSE
new file mode 100644
index 0000000..5dc6826
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2009,2014 Google Inc. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+ * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/go/src/github.com/pborman/uuid/README.google b/go/src/github.com/pborman/uuid/README.google
new file mode 100644
index 0000000..6b6e75b
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/README.google
@@ -0,0 +1,10 @@
+URL: https://github.com/pborman/uuid/archive/ca53cad383cad2479bbba7f7a1a05797ec1386e4.zip
+Version: ca53cad383cad2479bbba7f7a1a05797ec1386e4
+License: BSD
+License File: LICENSE
+
+Description:
+The uuid package generates and inspects UUIDs based on RFC 4122 and DCE 1.1: Authentication and Security Services.
+
+Local Modifications:
+No Modifications
diff --git a/go/src/github.com/pborman/uuid/dce.go b/go/src/github.com/pborman/uuid/dce.go
new file mode 100755
index 0000000..50a0f2d
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/dce.go
@@ -0,0 +1,84 @@
+// 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 (
+ "encoding/binary"
+ "fmt"
+ "os"
+)
+
+// A Domain represents a Version 2 domain
+type Domain byte
+
+// Domain constants for DCE Security (Version 2) UUIDs.
+const (
+ Person = Domain(0)
+ Group = Domain(1)
+ Org = Domain(2)
+)
+
+// NewDCESecurity returns a DCE Security (Version 2) UUID.
+//
+// The domain should be one of Person, Group or Org.
+// On a POSIX system the id should be the users UID for the Person
+// domain and the users GID for the Group. The meaning of id for
+// the domain Org or on non-POSIX systems is site defined.
+//
+// For a given domain/id pair the same token may be returned for up to
+// 7 minutes and 10 seconds.
+func NewDCESecurity(domain Domain, id uint32) UUID {
+ uuid := NewUUID()
+ if uuid != nil {
+ uuid[6] = (uuid[6] & 0x0f) | 0x20 // Version 2
+ uuid[9] = byte(domain)
+ binary.BigEndian.PutUint32(uuid[0:], id)
+ }
+ return uuid
+}
+
+// NewDCEPerson returns a DCE Security (Version 2) UUID in the person
+// domain with the id returned by os.Getuid.
+//
+// NewDCEPerson(Person, uint32(os.Getuid()))
+func NewDCEPerson() UUID {
+ return NewDCESecurity(Person, uint32(os.Getuid()))
+}
+
+// NewDCEGroup returns a DCE Security (Version 2) UUID in the group
+// domain with the id returned by os.Getgid.
+//
+// NewDCEGroup(Group, uint32(os.Getgid()))
+func NewDCEGroup() UUID {
+ return NewDCESecurity(Group, uint32(os.Getgid()))
+}
+
+// Domain returns the domain for a Version 2 UUID or false.
+func (uuid UUID) Domain() (Domain, bool) {
+ if v, _ := uuid.Version(); v != 2 {
+ return 0, false
+ }
+ return Domain(uuid[9]), true
+}
+
+// Id returns the id for a Version 2 UUID or false.
+func (uuid UUID) Id() (uint32, bool) {
+ if v, _ := uuid.Version(); v != 2 {
+ return 0, false
+ }
+ return binary.BigEndian.Uint32(uuid[0:4]), true
+}
+
+func (d Domain) String() string {
+ switch d {
+ case Person:
+ return "Person"
+ case Group:
+ return "Group"
+ case Org:
+ return "Org"
+ }
+ return fmt.Sprintf("Domain%d", int(d))
+}
diff --git a/go/src/github.com/pborman/uuid/doc.go b/go/src/github.com/pborman/uuid/doc.go
new file mode 100755
index 0000000..d8bd013
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/doc.go
@@ -0,0 +1,8 @@
+// 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.
+
+// The uuid package generates and inspects UUIDs.
+//
+// UUIDs are based on RFC 4122 and DCE 1.1: Authentication and Security Services.
+package uuid
diff --git a/go/src/github.com/pborman/uuid/hash.go b/go/src/github.com/pborman/uuid/hash.go
new file mode 100644
index 0000000..cdd4192
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/hash.go
@@ -0,0 +1,53 @@
+// 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 dervied 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)
+}
diff --git a/go/src/github.com/pborman/uuid/json.go b/go/src/github.com/pborman/uuid/json.go
new file mode 100644
index 0000000..760580a
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/json.go
@@ -0,0 +1,30 @@
+// Copyright 2014 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 "errors"
+
+func (u UUID) MarshalJSON() ([]byte, error) {
+ if len(u) == 0 {
+ return []byte(`""`), nil
+ }
+ return []byte(`"` + u.String() + `"`), nil
+}
+
+func (u *UUID) UnmarshalJSON(data []byte) error {
+ if len(data) == 0 || string(data) == `""` {
+ return nil
+ }
+ if len(data) < 2 || data[0] != '"' || data[len(data)-1] != '"' {
+ return errors.New("invalid UUID format")
+ }
+ data = data[1 : len(data)-1]
+ uu := Parse(string(data))
+ if uu == nil {
+ return errors.New("invalid UUID format")
+ }
+ *u = uu
+ return nil
+}
diff --git a/go/src/github.com/pborman/uuid/json_test.go b/go/src/github.com/pborman/uuid/json_test.go
new file mode 100644
index 0000000..b5eae09
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/json_test.go
@@ -0,0 +1,32 @@
+// Copyright 2014 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 (
+ "encoding/json"
+ "reflect"
+ "testing"
+)
+
+var testUUID = Parse("f47ac10b-58cc-0372-8567-0e02b2c3d479")
+
+func TestJSON(t *testing.T) {
+ type S struct {
+ ID1 UUID
+ ID2 UUID
+ }
+ s1 := S{ID1: testUUID}
+ data, err := json.Marshal(&s1)
+ if err != nil {
+ t.Fatal(err)
+ }
+ var s2 S
+ if err := json.Unmarshal(data, &s2); err != nil {
+ t.Fatal(err)
+ }
+ if !reflect.DeepEqual(&s1, &s2) {
+ t.Errorf("got %#v, want %#v", s2, s1)
+ }
+}
diff --git a/go/src/github.com/pborman/uuid/node.go b/go/src/github.com/pborman/uuid/node.go
new file mode 100755
index 0000000..dd0a8ac
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/node.go
@@ -0,0 +1,101 @@
+// 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 "net"
+
+var (
+ interfaces []net.Interface // cached list of interfaces
+ ifname string // name of interface being used
+ nodeID []byte // hardware for version 1 UUIDs
+)
+
+// NodeInterface returns the name of the interface from which the NodeID was
+// derived. The interface "user" is returned if the NodeID was set by
+// SetNodeID.
+func NodeInterface() string {
+ return ifname
+}
+
+// SetNodeInterface selects the hardware address to be used for Version 1 UUIDs.
+// If name is "" then the first usable interface found will be used or a random
+// Node ID will be generated. If a named interface cannot be found then false
+// is returned.
+//
+// SetNodeInterface never fails when name is "".
+func SetNodeInterface(name string) bool {
+ if interfaces == nil {
+ var err error
+ interfaces, err = net.Interfaces()
+ if err != nil && name != "" {
+ return false
+ }
+ }
+
+ for _, ifs := range interfaces {
+ if len(ifs.HardwareAddr) >= 6 && (name == "" || name == ifs.Name) {
+ if setNodeID(ifs.HardwareAddr) {
+ ifname = ifs.Name
+ return true
+ }
+ }
+ }
+
+ // We found no interfaces with a valid hardware address. If name
+ // does not specify a specific interface generate a random Node ID
+ // (section 4.1.6)
+ if name == "" {
+ if nodeID == nil {
+ nodeID = make([]byte, 6)
+ }
+ randomBits(nodeID)
+ return true
+ }
+ return false
+}
+
+// NodeID returns a slice of a copy of the current Node ID, setting the Node ID
+// if not already set.
+func NodeID() []byte {
+ if nodeID == nil {
+ SetNodeInterface("")
+ }
+ nid := make([]byte, 6)
+ copy(nid, nodeID)
+ return nid
+}
+
+// SetNodeID sets the Node ID to be used for Version 1 UUIDs. The first 6 bytes
+// of id are used. If id is less than 6 bytes then false is returned and the
+// Node ID is not set.
+func SetNodeID(id []byte) bool {
+ if setNodeID(id) {
+ ifname = "user"
+ return true
+ }
+ return false
+}
+
+func setNodeID(id []byte) bool {
+ if len(id) < 6 {
+ return false
+ }
+ if nodeID == nil {
+ nodeID = make([]byte, 6)
+ }
+ copy(nodeID, id)
+ return true
+}
+
+// NodeID returns the 6 byte node id encoded in uuid. It returns nil if uuid is
+// not valid. The NodeID is only well defined for version 1 and 2 UUIDs.
+func (uuid UUID) NodeID() []byte {
+ if len(uuid) != 16 {
+ return nil
+ }
+ node := make([]byte, 6)
+ copy(node, uuid[10:])
+ return node
+}
diff --git a/go/src/github.com/pborman/uuid/seq_test.go b/go/src/github.com/pborman/uuid/seq_test.go
new file mode 100644
index 0000000..3b3d143
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/seq_test.go
@@ -0,0 +1,66 @@
+// Copyright 2014 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 (
+ "flag"
+ "runtime"
+ "testing"
+ "time"
+)
+
+// This test is only run when --regressions is passed on the go test line.
+var regressions = flag.Bool("regressions", false, "run uuid regression tests")
+
+// TestClockSeqRace tests for a particular race condition of returning two
+// identical Version1 UUIDs. The duration of 1 minute was chosen as the race
+// condition, before being fixed, nearly always occured in under 30 seconds.
+func TestClockSeqRace(t *testing.T) {
+ if !*regressions {
+ t.Skip("skipping regression tests")
+ }
+ duration := time.Minute
+
+ done := make(chan struct{})
+ defer close(done)
+
+ ch := make(chan UUID, 10000)
+ ncpu := runtime.NumCPU()
+ switch ncpu {
+ case 0, 1:
+ // We can't run the test effectively.
+ t.Skip("skipping race test, only one CPU detected")
+ return
+ default:
+ runtime.GOMAXPROCS(ncpu)
+ }
+ for i := 0; i < ncpu; i++ {
+ go func() {
+ for {
+ select {
+ case <-done:
+ return
+ case ch <- NewUUID():
+ }
+ }
+ }()
+ }
+
+ uuids := make(map[string]bool)
+ cnt := 0
+ start := time.Now()
+ for u := range ch {
+ s := u.String()
+ if uuids[s] {
+ t.Errorf("duplicate uuid after %d in %v: %s", cnt, time.Since(start), s)
+ return
+ }
+ uuids[s] = true
+ if time.Since(start) > duration {
+ return
+ }
+ cnt++
+ }
+}
diff --git a/go/src/github.com/pborman/uuid/time.go b/go/src/github.com/pborman/uuid/time.go
new file mode 100755
index 0000000..7ebc9be
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/time.go
@@ -0,0 +1,132 @@
+// Copyright 2014 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 (
+ "encoding/binary"
+ "sync"
+ "time"
+)
+
+// A Time represents a time as the number of 100's of nanoseconds since 15 Oct
+// 1582.
+type Time int64
+
+const (
+ lillian = 2299160 // Julian day of 15 Oct 1582
+ unix = 2440587 // Julian day of 1 Jan 1970
+ epoch = unix - lillian // Days between epochs
+ g1582 = epoch * 86400 // seconds between epochs
+ g1582ns100 = g1582 * 10000000 // 100s of a nanoseconds between epochs
+)
+
+var (
+ mu sync.Mutex
+ lasttime uint64 // last time we returned
+ clock_seq uint16 // clock sequence for this run
+
+ timeNow = time.Now // for testing
+)
+
+// UnixTime converts t the number of seconds and nanoseconds using the Unix
+// epoch of 1 Jan 1970.
+func (t Time) UnixTime() (sec, nsec int64) {
+ sec = int64(t - g1582ns100)
+ nsec = (sec % 10000000) * 100
+ sec /= 10000000
+ return sec, nsec
+}
+
+// GetTime returns the current Time (100s of nanoseconds since 15 Oct 1582) and
+// clock sequence as well as adjusting the clock sequence as needed. An error
+// is returned if the current time cannot be determined.
+func GetTime() (Time, uint16, error) {
+ defer mu.Unlock()
+ mu.Lock()
+ return getTime()
+}
+
+func getTime() (Time, uint16, error) {
+ t := timeNow()
+
+ // If we don't have a clock sequence already, set one.
+ if clock_seq == 0 {
+ setClockSequence(-1)
+ }
+ now := uint64(t.UnixNano()/100) + g1582ns100
+
+ // If time has gone backwards with this clock sequence then we
+ // increment the clock sequence
+ if now <= lasttime {
+ clock_seq = ((clock_seq + 1) & 0x3fff) | 0x8000
+ }
+ lasttime = now
+ return Time(now), clock_seq, nil
+}
+
+// ClockSequence returns the current clock sequence, generating one if not
+// already set. The clock sequence is only used for Version 1 UUIDs.
+//
+// The uuid package does not use global static storage for the clock sequence or
+// the last time a UUID was generated. Unless SetClockSequence a new random
+// clock sequence is generated the first time a clock sequence is requested by
+// ClockSequence, GetTime, or NewUUID. (section 4.2.1.1) sequence is generated
+// for
+func ClockSequence() int {
+ defer mu.Unlock()
+ mu.Lock()
+ return clockSequence()
+}
+
+func clockSequence() int {
+ if clock_seq == 0 {
+ setClockSequence(-1)
+ }
+ return int(clock_seq & 0x3fff)
+}
+
+// SetClockSeq sets the clock sequence to the lower 14 bits of seq. Setting to
+// -1 causes a new sequence to be generated.
+func SetClockSequence(seq int) {
+ defer mu.Unlock()
+ mu.Lock()
+ setClockSequence(seq)
+}
+
+func setClockSequence(seq int) {
+ if seq == -1 {
+ var b [2]byte
+ randomBits(b[:]) // clock sequence
+ seq = int(b[0])<<8 | int(b[1])
+ }
+ old_seq := clock_seq
+ clock_seq = uint16(seq&0x3fff) | 0x8000 // Set our variant
+ if old_seq != clock_seq {
+ lasttime = 0
+ }
+}
+
+// Time returns the time in 100s of nanoseconds since 15 Oct 1582 encoded in
+// uuid. It returns false if uuid is not valid. The time is only well defined
+// for version 1 and 2 UUIDs.
+func (uuid UUID) Time() (Time, bool) {
+ if len(uuid) != 16 {
+ return 0, false
+ }
+ time := int64(binary.BigEndian.Uint32(uuid[0:4]))
+ time |= int64(binary.BigEndian.Uint16(uuid[4:6])) << 32
+ time |= int64(binary.BigEndian.Uint16(uuid[6:8])&0xfff) << 48
+ return Time(time), true
+}
+
+// ClockSequence returns the clock sequence encoded in uuid. It returns false
+// if uuid is not valid. The clock sequence is only well defined for version 1
+// and 2 UUIDs.
+func (uuid UUID) ClockSequence() (int, bool) {
+ if len(uuid) != 16 {
+ return 0, false
+ }
+ return int(binary.BigEndian.Uint16(uuid[8:10])) & 0x3fff, true
+}
diff --git a/go/src/github.com/pborman/uuid/util.go b/go/src/github.com/pborman/uuid/util.go
new file mode 100644
index 0000000..de40b10
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/util.go
@@ -0,0 +1,43 @@
+// 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 (
+ "io"
+)
+
+// randomBits completely fills slice b with random data.
+func randomBits(b []byte) {
+ if _, err := io.ReadFull(rander, b); err != nil {
+ panic(err.Error()) // rand should never fail
+ }
+}
+
+// xvalues returns the value of a byte as a hexadecimal digit or 255.
+var xvalues = []byte{
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 255, 255, 255, 255, 255, 255,
+ 255, 10, 11, 12, 13, 14, 15, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 10, 11, 12, 13, 14, 15, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+}
+
+// xtob converts the the first two hex bytes of x into a byte.
+func xtob(x string) (byte, bool) {
+ b1 := xvalues[x[0]]
+ b2 := xvalues[x[1]]
+ return (b1 << 4) | b2, b1 != 255 && b2 != 255
+}
diff --git a/go/src/github.com/pborman/uuid/uuid.go b/go/src/github.com/pborman/uuid/uuid.go
new file mode 100755
index 0000000..2920fae
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/uuid.go
@@ -0,0 +1,163 @@
+// 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 (
+ "bytes"
+ "crypto/rand"
+ "fmt"
+ "io"
+ "strings"
+)
+
+// A UUID is a 128 bit (16 byte) Universal Unique IDentifier as defined in RFC
+// 4122.
+type UUID []byte
+
+// A Version represents a UUIDs version.
+type Version byte
+
+// A Variant represents a UUIDs variant.
+type Variant byte
+
+// Constants returned by Variant.
+const (
+ Invalid = Variant(iota) // Invalid UUID
+ RFC4122 // The variant specified in RFC4122
+ Reserved // Reserved, NCS backward compatibility.
+ Microsoft // Reserved, Microsoft Corporation backward compatibility.
+ Future // Reserved for future definition.
+)
+
+var rander = rand.Reader // random function
+
+// New returns a new random (version 4) UUID as a string. It is a convenience
+// function for NewRandom().String().
+func New() string {
+ return NewRandom().String()
+}
+
+// Parse decodes s into a UUID or returns nil. Both the UUID form of
+// xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx and
+// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx are decoded.
+func Parse(s string) UUID {
+ if len(s) == 36+9 {
+ if strings.ToLower(s[:9]) != "urn:uuid:" {
+ return nil
+ }
+ s = s[9:]
+ } else if len(s) != 36 {
+ return nil
+ }
+ if s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-' {
+ return nil
+ }
+ uuid := make([]byte, 16)
+ for i, x := range []int{
+ 0, 2, 4, 6,
+ 9, 11,
+ 14, 16,
+ 19, 21,
+ 24, 26, 28, 30, 32, 34} {
+ if v, ok := xtob(s[x:]); !ok {
+ return nil
+ } else {
+ uuid[i] = v
+ }
+ }
+ return uuid
+}
+
+// Equal returns true if uuid1 and uuid2 are equal.
+func Equal(uuid1, uuid2 UUID) bool {
+ return bytes.Equal(uuid1, uuid2)
+}
+
+// String returns the string form of uuid, xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+// , or "" if uuid is invalid.
+func (uuid UUID) String() string {
+ if uuid == nil || len(uuid) != 16 {
+ return ""
+ }
+ b := []byte(uuid)
+ return fmt.Sprintf("%08x-%04x-%04x-%04x-%012x",
+ b[:4], b[4:6], b[6:8], b[8:10], b[10:])
+}
+
+// URN returns the RFC 2141 URN form of uuid,
+// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx, or "" if uuid is invalid.
+func (uuid UUID) URN() string {
+ if uuid == nil || len(uuid) != 16 {
+ return ""
+ }
+ b := []byte(uuid)
+ return fmt.Sprintf("urn:uuid:%08x-%04x-%04x-%04x-%012x",
+ b[:4], b[4:6], b[6:8], b[8:10], b[10:])
+}
+
+// Variant returns the variant encoded in uuid. It returns Invalid if
+// uuid is invalid.
+func (uuid UUID) Variant() Variant {
+ if len(uuid) != 16 {
+ return Invalid
+ }
+ switch {
+ case (uuid[8] & 0xc0) == 0x80:
+ return RFC4122
+ case (uuid[8] & 0xe0) == 0xc0:
+ return Microsoft
+ case (uuid[8] & 0xe0) == 0xe0:
+ return Future
+ default:
+ return Reserved
+ }
+ panic("unreachable")
+}
+
+// Version returns the verison of uuid. It returns false if uuid is not
+// valid.
+func (uuid UUID) Version() (Version, bool) {
+ if len(uuid) != 16 {
+ return 0, false
+ }
+ return Version(uuid[6] >> 4), true
+}
+
+func (v Version) String() string {
+ if v > 15 {
+ return fmt.Sprintf("BAD_VERSION_%d", v)
+ }
+ return fmt.Sprintf("VERSION_%d", v)
+}
+
+func (v Variant) String() string {
+ switch v {
+ case RFC4122:
+ return "RFC4122"
+ case Reserved:
+ return "Reserved"
+ case Microsoft:
+ return "Microsoft"
+ case Future:
+ return "Future"
+ case Invalid:
+ return "Invalid"
+ }
+ return fmt.Sprintf("BadVariant%d", int(v))
+}
+
+// SetRand sets the random number generator to r, which implents io.Reader.
+// If r.Read returns an error when the package requests random data then
+// a panic will be issued.
+//
+// Calling SetRand with nil sets the random number generator to the default
+// generator.
+func SetRand(r io.Reader) {
+ if r == nil {
+ rander = rand.Reader
+ return
+ }
+ rander = r
+}
diff --git a/go/src/github.com/pborman/uuid/uuid_test.go b/go/src/github.com/pborman/uuid/uuid_test.go
new file mode 100755
index 0000000..417ebeb
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/uuid_test.go
@@ -0,0 +1,390 @@
+// 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 (
+ "bytes"
+ "fmt"
+ "os"
+ "strings"
+ "testing"
+ "time"
+)
+
+type test struct {
+ in string
+ version Version
+ variant Variant
+ isuuid bool
+}
+
+var tests = []test{
+ {"f47ac10b-58cc-0372-8567-0e02b2c3d479", 0, RFC4122, true},
+ {"f47ac10b-58cc-1372-8567-0e02b2c3d479", 1, RFC4122, true},
+ {"f47ac10b-58cc-2372-8567-0e02b2c3d479", 2, RFC4122, true},
+ {"f47ac10b-58cc-3372-8567-0e02b2c3d479", 3, RFC4122, true},
+ {"f47ac10b-58cc-4372-8567-0e02b2c3d479", 4, RFC4122, true},
+ {"f47ac10b-58cc-5372-8567-0e02b2c3d479", 5, RFC4122, true},
+ {"f47ac10b-58cc-6372-8567-0e02b2c3d479", 6, RFC4122, true},
+ {"f47ac10b-58cc-7372-8567-0e02b2c3d479", 7, RFC4122, true},
+ {"f47ac10b-58cc-8372-8567-0e02b2c3d479", 8, RFC4122, true},
+ {"f47ac10b-58cc-9372-8567-0e02b2c3d479", 9, RFC4122, true},
+ {"f47ac10b-58cc-a372-8567-0e02b2c3d479", 10, RFC4122, true},
+ {"f47ac10b-58cc-b372-8567-0e02b2c3d479", 11, RFC4122, true},
+ {"f47ac10b-58cc-c372-8567-0e02b2c3d479", 12, RFC4122, true},
+ {"f47ac10b-58cc-d372-8567-0e02b2c3d479", 13, RFC4122, true},
+ {"f47ac10b-58cc-e372-8567-0e02b2c3d479", 14, RFC4122, true},
+ {"f47ac10b-58cc-f372-8567-0e02b2c3d479", 15, RFC4122, true},
+
+ {"urn:uuid:f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
+ {"URN:UUID:f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-1567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-2567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-3567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-4567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-5567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-6567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-7567-0e02b2c3d479", 4, Reserved, true},
+ {"f47ac10b-58cc-4372-8567-0e02b2c3d479", 4, RFC4122, true},
+ {"f47ac10b-58cc-4372-9567-0e02b2c3d479", 4, RFC4122, true},
+ {"f47ac10b-58cc-4372-a567-0e02b2c3d479", 4, RFC4122, true},
+ {"f47ac10b-58cc-4372-b567-0e02b2c3d479", 4, RFC4122, true},
+ {"f47ac10b-58cc-4372-c567-0e02b2c3d479", 4, Microsoft, true},
+ {"f47ac10b-58cc-4372-d567-0e02b2c3d479", 4, Microsoft, true},
+ {"f47ac10b-58cc-4372-e567-0e02b2c3d479", 4, Future, true},
+ {"f47ac10b-58cc-4372-f567-0e02b2c3d479", 4, Future, true},
+
+ {"f47ac10b158cc-5372-a567-0e02b2c3d479", 0, Invalid, false},
+ {"f47ac10b-58cc25372-a567-0e02b2c3d479", 0, Invalid, false},
+ {"f47ac10b-58cc-53723a567-0e02b2c3d479", 0, Invalid, false},
+ {"f47ac10b-58cc-5372-a56740e02b2c3d479", 0, Invalid, false},
+ {"f47ac10b-58cc-5372-a567-0e02-2c3d479", 0, Invalid, false},
+ {"g47ac10b-58cc-4372-a567-0e02b2c3d479", 0, Invalid, false},
+}
+
+var constants = []struct {
+ c interface{}
+ name string
+}{
+ {Person, "Person"},
+ {Group, "Group"},
+ {Org, "Org"},
+ {Invalid, "Invalid"},
+ {RFC4122, "RFC4122"},
+ {Reserved, "Reserved"},
+ {Microsoft, "Microsoft"},
+ {Future, "Future"},
+ {Domain(17), "Domain17"},
+ {Variant(42), "BadVariant42"},
+}
+
+func testTest(t *testing.T, in string, tt test) {
+ uuid := Parse(in)
+ if ok := (uuid != nil); ok != tt.isuuid {
+ t.Errorf("Parse(%s) got %v expected %v\b", in, ok, tt.isuuid)
+ }
+ if uuid == nil {
+ return
+ }
+
+ if v := uuid.Variant(); v != tt.variant {
+ t.Errorf("Variant(%s) got %d expected %d\b", in, v, tt.variant)
+ }
+ if v, _ := uuid.Version(); v != tt.version {
+ t.Errorf("Version(%s) got %d expected %d\b", in, v, tt.version)
+ }
+}
+
+func TestUUID(t *testing.T) {
+ for _, tt := range tests {
+ testTest(t, tt.in, tt)
+ testTest(t, strings.ToUpper(tt.in), tt)
+ }
+}
+
+func TestConstants(t *testing.T) {
+ for x, tt := range constants {
+ v, ok := tt.c.(fmt.Stringer)
+ if !ok {
+ t.Errorf("%x: %v: not a stringer", x, v)
+ } else if s := v.String(); s != tt.name {
+ v, _ := tt.c.(int)
+ t.Errorf("%x: Constant %T:%d gives %q, expected %q\n", x, tt.c, v, s, tt.name)
+ }
+ }
+}
+
+func TestRandomUUID(t *testing.T) {
+ m := make(map[string]bool)
+ for x := 1; x < 32; x++ {
+ uuid := NewRandom()
+ s := uuid.String()
+ if m[s] {
+ t.Errorf("NewRandom returned duplicated UUID %s\n", s)
+ }
+ m[s] = true
+ if v, _ := uuid.Version(); v != 4 {
+ t.Errorf("Random UUID of version %s\n", v)
+ }
+ if uuid.Variant() != RFC4122 {
+ t.Errorf("Random UUID is variant %d\n", uuid.Variant())
+ }
+ }
+}
+
+func TestNew(t *testing.T) {
+ m := make(map[string]bool)
+ for x := 1; x < 32; x++ {
+ s := New()
+ if m[s] {
+ t.Errorf("New returned duplicated UUID %s\n", s)
+ }
+ m[s] = true
+ uuid := Parse(s)
+ if uuid == nil {
+ t.Errorf("New returned %q which does not decode\n", s)
+ continue
+ }
+ if v, _ := uuid.Version(); v != 4 {
+ t.Errorf("Random UUID of version %s\n", v)
+ }
+ if uuid.Variant() != RFC4122 {
+ t.Errorf("Random UUID is variant %d\n", uuid.Variant())
+ }
+ }
+}
+
+func clockSeq(t *testing.T, uuid UUID) int {
+ seq, ok := uuid.ClockSequence()
+ if !ok {
+ t.Fatalf("%s: invalid clock sequence\n", uuid)
+ }
+ return seq
+}
+
+func TestClockSeq(t *testing.T) {
+ // Fake time.Now for this test to return a monotonically advancing time; restore it at end.
+ defer func(orig func() time.Time) { timeNow = orig }(timeNow)
+ monTime := time.Now()
+ timeNow = func() time.Time {
+ monTime = monTime.Add(1 * time.Second)
+ return monTime
+ }
+
+ SetClockSequence(-1)
+ uuid1 := NewUUID()
+ uuid2 := NewUUID()
+
+ if clockSeq(t, uuid1) != clockSeq(t, uuid2) {
+ t.Errorf("clock sequence %d != %d\n", clockSeq(t, uuid1), clockSeq(t, uuid2))
+ }
+
+ SetClockSequence(-1)
+ uuid2 = NewUUID()
+
+ // Just on the very off chance we generated the same sequence
+ // two times we try again.
+ if clockSeq(t, uuid1) == clockSeq(t, uuid2) {
+ SetClockSequence(-1)
+ uuid2 = NewUUID()
+ }
+ if clockSeq(t, uuid1) == clockSeq(t, uuid2) {
+ t.Errorf("Duplicate clock sequence %d\n", clockSeq(t, uuid1))
+ }
+
+ SetClockSequence(0x1234)
+ uuid1 = NewUUID()
+ if seq := clockSeq(t, uuid1); seq != 0x1234 {
+ t.Errorf("%s: expected seq 0x1234 got 0x%04x\n", uuid1, seq)
+ }
+}
+
+func TestCoding(t *testing.T) {
+ text := "7d444840-9dc0-11d1-b245-5ffdce74fad2"
+ urn := "urn:uuid:7d444840-9dc0-11d1-b245-5ffdce74fad2"
+ data := UUID{
+ 0x7d, 0x44, 0x48, 0x40,
+ 0x9d, 0xc0,
+ 0x11, 0xd1,
+ 0xb2, 0x45,
+ 0x5f, 0xfd, 0xce, 0x74, 0xfa, 0xd2,
+ }
+ if v := data.String(); v != text {
+ t.Errorf("%x: encoded to %s, expected %s\n", data, v, text)
+ }
+ if v := data.URN(); v != urn {
+ t.Errorf("%x: urn is %s, expected %s\n", data, v, urn)
+ }
+
+ uuid := Parse(text)
+ if !Equal(uuid, data) {
+ t.Errorf("%s: decoded to %s, expected %s\n", text, uuid, data)
+ }
+}
+
+func TestVersion1(t *testing.T) {
+ uuid1 := NewUUID()
+ uuid2 := NewUUID()
+
+ if Equal(uuid1, uuid2) {
+ t.Errorf("%s:duplicate uuid\n", uuid1)
+ }
+ if v, _ := uuid1.Version(); v != 1 {
+ t.Errorf("%s: version %s expected 1\n", uuid1, v)
+ }
+ if v, _ := uuid2.Version(); v != 1 {
+ t.Errorf("%s: version %s expected 1\n", uuid2, v)
+ }
+ n1 := uuid1.NodeID()
+ n2 := uuid2.NodeID()
+ if !bytes.Equal(n1, n2) {
+ t.Errorf("Different nodes %x != %x\n", n1, n2)
+ }
+ t1, ok := uuid1.Time()
+ if !ok {
+ t.Errorf("%s: invalid time\n", uuid1)
+ }
+ t2, ok := uuid2.Time()
+ if !ok {
+ t.Errorf("%s: invalid time\n", uuid2)
+ }
+ q1, ok := uuid1.ClockSequence()
+ if !ok {
+ t.Errorf("%s: invalid clock sequence\n", uuid1)
+ }
+ q2, ok := uuid2.ClockSequence()
+ if !ok {
+ t.Errorf("%s: invalid clock sequence", uuid2)
+ }
+
+ switch {
+ case t1 == t2 && q1 == q2:
+ t.Errorf("time stopped\n")
+ case t1 > t2 && q1 == q2:
+ t.Errorf("time reversed\n")
+ case t1 < t2 && q1 != q2:
+ t.Errorf("clock sequence chaned unexpectedly\n")
+ }
+}
+
+func TestNodeAndTime(t *testing.T) {
+ // Time is February 5, 1998 12:30:23.136364800 AM GMT
+
+ uuid := Parse("7d444840-9dc0-11d1-b245-5ffdce74fad2")
+ node := []byte{0x5f, 0xfd, 0xce, 0x74, 0xfa, 0xd2}
+
+ ts, ok := uuid.Time()
+ if ok {
+ c := time.Unix(ts.UnixTime())
+ want := time.Date(1998, 2, 5, 0, 30, 23, 136364800, time.UTC)
+ if !c.Equal(want) {
+ t.Errorf("Got time %v, want %v", c, want)
+ }
+ } else {
+ t.Errorf("%s: bad time\n", uuid)
+ }
+ if !bytes.Equal(node, uuid.NodeID()) {
+ t.Errorf("Expected node %v got %v\n", node, uuid.NodeID())
+ }
+}
+
+func TestMD5(t *testing.T) {
+ uuid := NewMD5(NameSpace_DNS, []byte("python.org")).String()
+ want := "6fa459ea-ee8a-3ca4-894e-db77e160355e"
+ if uuid != want {
+ t.Errorf("MD5: got %q expected %q\n", uuid, want)
+ }
+}
+
+func TestSHA1(t *testing.T) {
+ uuid := NewSHA1(NameSpace_DNS, []byte("python.org")).String()
+ want := "886313e1-3b8a-5372-9b90-0c9aee199e5d"
+ if uuid != want {
+ t.Errorf("SHA1: got %q expected %q\n", uuid, want)
+ }
+}
+
+func TestNodeID(t *testing.T) {
+ nid := []byte{1, 2, 3, 4, 5, 6}
+ SetNodeInterface("")
+ s := NodeInterface()
+ if s == "" || s == "user" {
+ t.Errorf("NodeInterface %q after SetInteface\n", s)
+ }
+ node1 := NodeID()
+ if node1 == nil {
+ t.Errorf("NodeID nil after SetNodeInterface\n", s)
+ }
+ SetNodeID(nid)
+ s = NodeInterface()
+ if s != "user" {
+ t.Errorf("Expected NodeInterface %q got %q\n", "user", s)
+ }
+ node2 := NodeID()
+ if node2 == nil {
+ t.Errorf("NodeID nil after SetNodeID\n", s)
+ }
+ if bytes.Equal(node1, node2) {
+ t.Errorf("NodeID not changed after SetNodeID\n", s)
+ } else if !bytes.Equal(nid, node2) {
+ t.Errorf("NodeID is %x, expected %x\n", node2, nid)
+ }
+}
+
+func testDCE(t *testing.T, name string, uuid UUID, domain Domain, id uint32) {
+ if uuid == nil {
+ t.Errorf("%s failed\n", name)
+ return
+ }
+ if v, _ := uuid.Version(); v != 2 {
+ t.Errorf("%s: %s: expected version 2, got %s\n", name, uuid, v)
+ return
+ }
+ if v, ok := uuid.Domain(); !ok || v != domain {
+ if !ok {
+ t.Errorf("%s: %d: Domain failed\n", name, uuid)
+ } else {
+ t.Errorf("%s: %s: expected domain %d, got %d\n", name, uuid, domain, v)
+ }
+ }
+ if v, ok := uuid.Id(); !ok || v != id {
+ if !ok {
+ t.Errorf("%s: %d: Id failed\n", name, uuid)
+ } else {
+ t.Errorf("%s: %s: expected id %d, got %d\n", name, uuid, id, v)
+ }
+ }
+}
+
+func TestDCE(t *testing.T) {
+ testDCE(t, "NewDCESecurity", NewDCESecurity(42, 12345678), 42, 12345678)
+ testDCE(t, "NewDCEPerson", NewDCEPerson(), Person, uint32(os.Getuid()))
+ testDCE(t, "NewDCEGroup", NewDCEGroup(), Group, uint32(os.Getgid()))
+}
+
+type badRand struct{}
+
+func (r badRand) Read(buf []byte) (int, error) {
+ for i, _ := range buf {
+ buf[i] = byte(i)
+ }
+ return len(buf), nil
+}
+
+func TestBadRand(t *testing.T) {
+ SetRand(badRand{})
+ uuid1 := New()
+ uuid2 := New()
+ if uuid1 != uuid2 {
+ t.Errorf("execpted duplicates, got %q and %q\n", uuid1, uuid2)
+ }
+ SetRand(nil)
+ uuid1 = New()
+ uuid2 = New()
+ if uuid1 == uuid2 {
+ t.Errorf("unexecpted duplicates, got %q\n", uuid1)
+ }
+}
diff --git a/go/src/github.com/pborman/uuid/version1.go b/go/src/github.com/pborman/uuid/version1.go
new file mode 100644
index 0000000..0127eac
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/version1.go
@@ -0,0 +1,41 @@
+// 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 (
+ "encoding/binary"
+)
+
+// NewUUID returns a Version 1 UUID based on the current NodeID and clock
+// sequence, and the current time. If the NodeID has not been set by SetNodeID
+// or SetNodeInterface then it will be set automatically. If the NodeID cannot
+// be set NewUUID returns nil. If clock sequence has not been set by
+// SetClockSequence then it will be set automatically. If GetTime fails to
+// return the current NewUUID returns nil.
+func NewUUID() UUID {
+ if nodeID == nil {
+ SetNodeInterface("")
+ }
+
+ now, seq, err := GetTime()
+ if err != nil {
+ return nil
+ }
+
+ uuid := make([]byte, 16)
+
+ time_low := uint32(now & 0xffffffff)
+ time_mid := uint16((now >> 32) & 0xffff)
+ time_hi := uint16((now >> 48) & 0x0fff)
+ time_hi |= 0x1000 // Version 1
+
+ binary.BigEndian.PutUint32(uuid[0:], time_low)
+ binary.BigEndian.PutUint16(uuid[4:], time_mid)
+ binary.BigEndian.PutUint16(uuid[6:], time_hi)
+ binary.BigEndian.PutUint16(uuid[8:], seq)
+ copy(uuid[10:], nodeID)
+
+ return uuid
+}
diff --git a/go/src/github.com/pborman/uuid/version4.go b/go/src/github.com/pborman/uuid/version4.go
new file mode 100644
index 0000000..b3d4a36
--- /dev/null
+++ b/go/src/github.com/pborman/uuid/version4.go
@@ -0,0 +1,25 @@
+// 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
+
+// Random returns a Random (Version 4) UUID or panics.
+//
+// The strength of the UUIDs is based on the strength of the crypto/rand
+// package.
+//
+// A note about uniqueness derived from from the UUID Wikipedia entry:
+//
+// Randomly generated UUIDs have 122 random bits. One's annual risk of being
+// hit by a meteorite is estimated to be one chance in 17 billion, that
+// means the probability is about 0.00000000006 (6 × 10−11),
+// equivalent to the odds of creating a few tens of trillions of UUIDs in a
+// year and having one duplicate.
+func NewRandom() UUID {
+ uuid := make([]byte, 16)
+ randomBits([]byte(uuid))
+ uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
+ uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
+ return uuid
+}
