ba4a6bbe02
Microsoft has updated the golang Azure SDK significantly. Update the azure storage driver to use the new SDK. Add support for client secret and MSI authentication schemes in addition to shared key authentication. Implement rootDirectory support for the azure storage driver to mirror the S3 driver. Signed-off-by: Kirat Singh <kirat.singh@beacon.io> Co-authored-by: Cory Snider <corhere@gmail.com>
123 lines
3.4 KiB
Go
123 lines
3.4 KiB
Go
// Copyright 2016 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package uuid
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import (
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"encoding/binary"
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"sync"
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"time"
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)
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// A Time represents a time as the number of 100's of nanoseconds since 15 Oct
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// 1582.
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type Time int64
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const (
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lillian = 2299160 // Julian day of 15 Oct 1582
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unix = 2440587 // Julian day of 1 Jan 1970
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epoch = unix - lillian // Days between epochs
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g1582 = epoch * 86400 // seconds between epochs
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g1582ns100 = g1582 * 10000000 // 100s of a nanoseconds between epochs
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)
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var (
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timeMu sync.Mutex
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lasttime uint64 // last time we returned
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clockSeq uint16 // clock sequence for this run
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timeNow = time.Now // for testing
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)
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// UnixTime converts t the number of seconds and nanoseconds using the Unix
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// epoch of 1 Jan 1970.
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func (t Time) UnixTime() (sec, nsec int64) {
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sec = int64(t - g1582ns100)
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nsec = (sec % 10000000) * 100
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sec /= 10000000
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return sec, nsec
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}
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// GetTime returns the current Time (100s of nanoseconds since 15 Oct 1582) and
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// clock sequence as well as adjusting the clock sequence as needed. An error
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// is returned if the current time cannot be determined.
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func GetTime() (Time, uint16, error) {
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defer timeMu.Unlock()
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timeMu.Lock()
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return getTime()
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}
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func getTime() (Time, uint16, error) {
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t := timeNow()
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// If we don't have a clock sequence already, set one.
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if clockSeq == 0 {
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setClockSequence(-1)
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}
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now := uint64(t.UnixNano()/100) + g1582ns100
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// If time has gone backwards with this clock sequence then we
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// increment the clock sequence
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if now <= lasttime {
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clockSeq = ((clockSeq + 1) & 0x3fff) | 0x8000
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}
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lasttime = now
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return Time(now), clockSeq, nil
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}
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// ClockSequence returns the current clock sequence, generating one if not
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// already set. The clock sequence is only used for Version 1 UUIDs.
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//
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// The uuid package does not use global static storage for the clock sequence or
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// the last time a UUID was generated. Unless SetClockSequence is used, a new
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// random clock sequence is generated the first time a clock sequence is
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// requested by ClockSequence, GetTime, or NewUUID. (section 4.2.1.1)
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func ClockSequence() int {
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defer timeMu.Unlock()
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timeMu.Lock()
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return clockSequence()
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}
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func clockSequence() int {
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if clockSeq == 0 {
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setClockSequence(-1)
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}
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return int(clockSeq & 0x3fff)
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}
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// SetClockSequence sets the clock sequence to the lower 14 bits of seq. Setting to
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// -1 causes a new sequence to be generated.
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func SetClockSequence(seq int) {
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defer timeMu.Unlock()
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timeMu.Lock()
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setClockSequence(seq)
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}
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func setClockSequence(seq int) {
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if seq == -1 {
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var b [2]byte
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randomBits(b[:]) // clock sequence
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seq = int(b[0])<<8 | int(b[1])
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}
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oldSeq := clockSeq
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clockSeq = uint16(seq&0x3fff) | 0x8000 // Set our variant
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if oldSeq != clockSeq {
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lasttime = 0
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}
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}
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// Time returns the time in 100s of nanoseconds since 15 Oct 1582 encoded in
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// uuid. The time is only defined for version 1 and 2 UUIDs.
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func (uuid UUID) Time() Time {
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time := int64(binary.BigEndian.Uint32(uuid[0:4]))
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time |= int64(binary.BigEndian.Uint16(uuid[4:6])) << 32
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time |= int64(binary.BigEndian.Uint16(uuid[6:8])&0xfff) << 48
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return Time(time)
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}
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// ClockSequence returns the clock sequence encoded in uuid.
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// The clock sequence is only well defined for version 1 and 2 UUIDs.
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func (uuid UUID) ClockSequence() int {
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return int(binary.BigEndian.Uint16(uuid[8:10])) & 0x3fff
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}
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