Update github.com/pquerna/otp from untagged to v1.2.0 (#11358)

2020-05-10 14:50:16 +02:00 · 2020-05-10 14:50:16 +02:00 · 43bb85908d
parent 57b6f83191
commit 43bb85908d
16 changed files with 192 additions and 54 deletions
--- a/go.mod
+++ b/go.mod
@ -22,7 +22,6 @@ require (
 	github.com/RoaringBitmap/roaring v0.4.23 // indirect
 	github.com/bgentry/speakeasy v0.1.0 // indirect
 	github.com/blevesearch/bleve v1.0.7
-	github.com/boombuler/barcode v0.0.0-20161226211916-fe0f26ff6d26 // indirect
 	github.com/couchbase/gomemcached v0.0.0-20191004160342-7b5da2ec40b2 // indirect
 	github.com/cznic/b v0.0.0-20181122101859-a26611c4d92d // indirect
 	github.com/cznic/mathutil v0.0.0-20181122101859-297441e03548 // indirect
@ -80,7 +79,7 @@ require (
 	github.com/oliamb/cutter v0.2.2
 	github.com/olivere/elastic/v7 v7.0.9
 	github.com/pkg/errors v0.9.1
-	github.com/pquerna/otp v0.0.0-20160912161815-54653902c20e
+	github.com/pquerna/otp v1.2.0
 	github.com/prometheus/client_golang v1.1.0
 	github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 // indirect
 	github.com/prometheus/procfs v0.0.4 // indirect
--- a/go.sum
+++ b/go.sum
@ -101,8 +101,8 @@ github.com/blevesearch/zap/v11 v11.0.7 h1:nnmAOP6eXBkqEa1Srq1eqA5Wmn4w+BZjLdjynN
 github.com/blevesearch/zap/v11 v11.0.7/go.mod h1:bJoY56fdU2m/IP4LLz/1h4jY2thBoREvoqbuJ8zhm9k=
 github.com/blevesearch/zap/v12 v12.0.7 h1:y8FWSAYkdc4p1dn4YLxNNr1dxXlSUsakJh2Fc/r6cj4=
 github.com/blevesearch/zap/v12 v12.0.7/go.mod h1:70DNK4ZN4tb42LubeDbfpp6xnm8g3ROYVvvZ6pEoXD8=
-github.com/boombuler/barcode v0.0.0-20161226211916-fe0f26ff6d26 h1:NGpwhs9FOwddM6TptNrq2ycby4s24TcppSe5uG4DA/Q=
-github.com/boombuler/barcode v0.0.0-20161226211916-fe0f26ff6d26/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
+github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc h1:biVzkmvwrH8WK8raXaxBx6fRVTlJILwEwQGL1I/ByEI=
+github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
 github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668 h1:U/lr3Dgy4WK+hNk4tyD+nuGjpVLPEHuJSFXMw11/HPA=
 github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668/go.mod h1:H0wQNHz2YrLsuXOZozoeDmnHXkNCRmMW0gwFWDfEZDA=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
@ -520,8 +520,8 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35/go.mod h1:prYjPmNq4d1NPVmpShWobRqXY3q7Vp+80DqgxxUrUIA=
-github.com/pquerna/otp v0.0.0-20160912161815-54653902c20e h1:ApqncJ84HYN8x8x5WV1T1YWDuPRF/0aXZhr91LnRMCQ=
-github.com/pquerna/otp v0.0.0-20160912161815-54653902c20e/go.mod h1:Zad1CMQfSQZI5KLpahDiSUX4tMMREnXw98IvL1nhgMk=
+github.com/pquerna/otp v1.2.0 h1:/A3+Jn+cagqayeR3iHs/L62m5ue7710D35zl1zJ1kok=
+github.com/pquerna/otp v1.2.0/go.mod h1:dkJfzwRKNiegxyNb54X/3fLwhCynbMspSyWKnvi1AEg=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v0.9.3-0.20190127221311-3c4408c8b829/go.mod h1:p2iRAGwDERtqlqzRXnrOVns+ignqQo//hLXqYxZYVNs=
 github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDft0ttaMvbicHlPoso=
--- a/vendor/github.com/boombuler/barcode/.gitignore
+++ b/vendor/github.com/boombuler/barcode/.gitignore
@ -0,0 +1 @@
+.vscode/
--- a/vendor/github.com/boombuler/barcode/README.md
+++ b/vendor/github.com/boombuler/barcode/README.md
@ -1,18 +1,53 @@
-##Introduction##
+[![Join the chat at https://gitter.im/golang-barcode/Lobby](https://badges.gitter.im/golang-barcode/Lobby.svg)](https://gitter.im/golang-barcode/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+## Introduction ##
+
 This is a package for GO which can be used to create different types of barcodes.

-##Supported Barcode Types##
+## Supported Barcode Types ##
+* 2 of 5
 * Aztec Code
 * Codabar
 * Code 128
 * Code 39
-* EAN 8
-* EAN 13
+* Code 93
 * Datamatrix
-* QR Codes
-* 2 of 5
+* EAN 13
+* EAN 8
+* PDF 417
+* QR Code

-##Documentation##
+## Example ##
+
+This is a simple example on how to create a QR-Code and write it to a png-file
+```go
+package main
+
+import (
+	"image/png"
+	"os"
+
+	"github.com/boombuler/barcode"
+	"github.com/boombuler/barcode/qr"
+)
+
+func main() {
+	// Create the barcode
+	qrCode, _ := qr.Encode("Hello World", qr.M, qr.Auto)
+
+	// Scale the barcode to 200x200 pixels
+	qrCode, _ = barcode.Scale(qrCode, 200, 200)
+
+	// create the output file
+	file, _ := os.Create("qrcode.png")
+	defer file.Close()
+
+	// encode the barcode as png
+	png.Encode(file, qrCode)
+}
+```
+
+## Documentation ##
 See [GoDoc](https://godoc.org/github.com/boombuler/barcode)

 To create a barcode use the Encode function from one of the subpackages.
--- a/vendor/github.com/boombuler/barcode/barcode.go
+++ b/vendor/github.com/boombuler/barcode/barcode.go
@ -2,6 +2,21 @@ package barcode

 import "image"

+const (
+	TypeAztec           = "Aztec"
+	TypeCodabar         = "Codabar"
+	TypeCode128         = "Code 128"
+	TypeCode39          = "Code 39"
+	TypeCode93          = "Code 93"
+	TypeDataMatrix      = "DataMatrix"
+	TypeEAN8            = "EAN 8"
+	TypeEAN13           = "EAN 13"
+	TypePDF             = "PDF417"
+	TypeQR              = "QR Code"
+	Type2of5            = "2 of 5"
+	Type2of5Interleaved = "2 of 5 (interleaved)"
+)
+
 // Contains some meta information about a barcode
 type Metadata struct {
 	// the name of the barcode kind
@ -17,5 +32,11 @@ type Barcode interface {
 	Metadata() Metadata
 	// the data that was encoded in this barcode
 	Content() string
+}
+
+// Additional interface that some barcodes might implement to provide
+// the value of its checksum.
+type BarcodeIntCS interface {
+	Barcode
 	CheckSum() int
 }
--- a/vendor/github.com/boombuler/barcode/go.mod
+++ b/vendor/github.com/boombuler/barcode/go.mod
@ -0,0 +1 @@
+module github.com/boombuler/barcode
--- a/vendor/github.com/boombuler/barcode/qr/qrcode.go
+++ b/vendor/github.com/boombuler/barcode/qr/qrcode.go
@ -20,7 +20,7 @@ func (qr *qrcode) Content() string {
 }

 func (qr *qrcode) Metadata() barcode.Metadata {
-	return barcode.Metadata{"QR Code", 2}
+	return barcode.Metadata{barcode.TypeQR, 2}
 }

 func (qr *qrcode) ColorModel() color.Model {
@ -46,10 +46,6 @@ func (qr *qrcode) Set(x, y int, val bool) {
 	qr.data.SetBit(x*qr.dimension+y, val)
 }

-func (qr *qrcode) CheckSum() int {
-	return 0
-}
-
 func (qr *qrcode) calcPenalty() uint {
 	return qr.calcPenaltyRule1() + qr.calcPenaltyRule2() + qr.calcPenaltyRule3() + qr.calcPenaltyRule4()
 }
--- a/vendor/github.com/boombuler/barcode/scaledbarcode.go
+++ b/vendor/github.com/boombuler/barcode/scaledbarcode.go
@ -16,6 +16,10 @@ type scaledBarcode struct {
 	rect        image.Rectangle
 }

+type intCSscaledBC struct {
+	scaledBarcode
+}
+
 func (bc *scaledBarcode) Content() string {
 	return bc.wrapped.Content()
 }
@ -36,8 +40,11 @@ func (bc *scaledBarcode) At(x, y int) color.Color {
 	return bc.wrapperFunc(x, y)
 }

-func (bc *scaledBarcode) CheckSum() int {
-	return bc.wrapped.CheckSum()
+func (bc *intCSscaledBC) CheckSum() int {
+	if cs, ok := bc.wrapped.(BarcodeIntCS); ok {
+		return cs.CheckSum()
+	}
+	return 0
 }

 // Scale returns a resized barcode with the given width and height.
@ -52,6 +59,19 @@ func Scale(bc Barcode, width, height int) (Barcode, error) {
 	return nil, errors.New("unsupported barcode format")
 }

+func newScaledBC(wrapped Barcode, wrapperFunc wrapFunc, rect image.Rectangle) Barcode {
+	result := &scaledBarcode{
+		wrapped:     wrapped,
+		wrapperFunc: wrapperFunc,
+		rect:        rect,
+	}
+
+	if _, ok := wrapped.(BarcodeIntCS); ok {
+		return &intCSscaledBC{*result}
+	}
+	return result
+}
+
 func scale2DCode(bc Barcode, width, height int) (Barcode, error) {
 	orgBounds := bc.Bounds()
 	orgWidth := orgBounds.Max.X - orgBounds.Min.X
@ -59,7 +79,7 @@ func scale2DCode(bc Barcode, width, height int) (Barcode, error) {

 	factor := int(math.Min(float64(width)/float64(orgWidth), float64(height)/float64(orgHeight)))
 	if factor <= 0 {
-		return nil, fmt.Errorf("can not scale barcode to an image smaller then %dx%d", orgWidth, orgHeight)
+		return nil, fmt.Errorf("can not scale barcode to an image smaller than %dx%d", orgWidth, orgHeight)
 	}

 	offsetX := (width - (orgWidth * factor)) / 2
@ -77,11 +97,11 @@ func scale2DCode(bc Barcode, width, height int) (Barcode, error) {
 		return bc.At(x, y)
 	}

-	return &scaledBarcode{
+	return newScaledBC(
 		bc,
 		wrap,
 		image.Rect(0, 0, width, height),
-	}, nil
+	), nil
 }

 func scale1DCode(bc Barcode, width, height int) (Barcode, error) {
@ -90,7 +110,7 @@ func scale1DCode(bc Barcode, width, height int) (Barcode, error) {
 	factor := int(float64(width) / float64(orgWidth))

 	if factor <= 0 {
-		return nil, fmt.Errorf("can not scale barcode to an image smaller then %dx1", orgWidth)
+		return nil, fmt.Errorf("can not scale barcode to an image smaller than %dx1", orgWidth)
 	}
 	offsetX := (width - (orgWidth * factor)) / 2

@ -106,10 +126,9 @@ func scale1DCode(bc Barcode, width, height int) (Barcode, error) {
 		return bc.At(x, 0)
 	}

-	return &scaledBarcode{
+	return newScaledBC(
 		bc,
 		wrap,
 		image.Rect(0, 0, width, height),
-	}, nil
-
+	), nil
 }
--- a/vendor/github.com/boombuler/barcode/utils/base1dcode.go
+++ b/vendor/github.com/boombuler/barcode/utils/base1dcode.go
@ -10,8 +10,12 @@ import (

 type base1DCode struct {
 	*BitList
-	kind     string
-	content  string
+	kind    string
+	content string
+}
+
+type base1DCodeIntCS struct {
+	base1DCode
 	checksum int
 }

@ -38,11 +42,16 @@ func (c *base1DCode) At(x, y int) color.Color {
 	return color.White
 }

-func (c *base1DCode) CheckSum() int {
+func (c *base1DCodeIntCS) CheckSum() int {
 	return c.checksum
 }

-// New1DCode creates a new 1D barcode where the bars are represented by the bits in the bars BitList
-func New1DCode(codeKind, content string, bars *BitList, checksum int) barcode.Barcode {
-	return &base1DCode{bars, codeKind, content, checksum}
+// New1DCodeIntCheckSum creates a new 1D barcode where the bars are represented by the bits in the bars BitList
+func New1DCodeIntCheckSum(codeKind, content string, bars *BitList, checksum int) barcode.BarcodeIntCS {
+	return &base1DCodeIntCS{base1DCode{bars, codeKind, content}, checksum}
+}
+
+// New1DCode creates a new 1D barcode where the bars are represented by the bits in the bars BitList
+func New1DCode(codeKind, content string, bars *BitList) barcode.Barcode {
+	return &base1DCode{bars, codeKind, content}
 }
--- a/vendor/github.com/pquerna/otp/.travis.yml
+++ b/vendor/github.com/pquerna/otp/.travis.yml
@ -1,6 +1,7 @@
 language: go

+env:
+  - GO111MODULE=on
+
 go:
-  - 1.5
-  - 1.6
-  - tip
+  - "1.12"
--- a/vendor/github.com/pquerna/otp/go.mod
+++ b/vendor/github.com/pquerna/otp/go.mod
@ -0,0 +1,8 @@
+module github.com/pquerna/otp
+
+go 1.12
+
+require (
+	github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc
+	github.com/stretchr/testify v1.3.0
+)
--- a/vendor/github.com/pquerna/otp/go.sum
+++ b/vendor/github.com/pquerna/otp/go.sum
@ -0,0 +1,11 @@
+github.com/boombuler/barcode v1.0.0 h1:s1TvRnXwL2xJRaccrdcBQMZxq6X7DvsMogtmJeHDdrc=
+github.com/boombuler/barcode v1.0.0/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
+github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc h1:biVzkmvwrH8WK8raXaxBx6fRVTlJILwEwQGL1I/ByEI=
+github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
--- a/vendor/github.com/pquerna/otp/hotp/hotp.go
+++ b/vendor/github.com/pquerna/otp/hotp/hotp.go
@ -70,6 +70,17 @@ func GenerateCode(secret string, counter uint64) (string, error) {
 // GenerateCodeCustom uses a counter and secret value and options struct to
 // create a passcode.
 func GenerateCodeCustom(secret string, counter uint64, opts ValidateOpts) (passcode string, err error) {
+	// As noted in issue #10 and #17 this adds support for TOTP secrets that are
+	// missing their padding.
+	secret = strings.TrimSpace(secret)
+	if n := len(secret) % 8; n != 0 {
+		secret = secret + strings.Repeat("=", 8-n)
+	}
+
+	// As noted in issue #24 Google has started producing base32 in lower case,
+	// but the StdEncoding (and the RFC), expect a dictionary of only upper case letters.
+	secret = strings.ToUpper(secret)
+
 	secretBytes, err := base32.StdEncoding.DecodeString(secret)
 	if err != nil {
 		return "", otp.ErrValidateSecretInvalidBase32
@ -135,12 +146,16 @@ type GenerateOpts struct {
 	AccountName string
 	// Size in size of the generated Secret. Defaults to 10 bytes.
 	SecretSize uint
+	// Secret to store. Defaults to a randomly generated secret of SecretSize.  You should generally leave this empty.
+	Secret []byte
 	// Digits to request. Defaults to 6.
 	Digits otp.Digits
 	// Algorithm to use for HMAC. Defaults to SHA1.
 	Algorithm otp.Algorithm
 }

+var b32NoPadding = base32.StdEncoding.WithPadding(base32.NoPadding)
+
 // Generate creates a new HOTP Key.
 func Generate(opts GenerateOpts) (*otp.Key, error) {
 	// url encode the Issuer/AccountName
@ -156,16 +171,24 @@ func Generate(opts GenerateOpts) (*otp.Key, error) {
 		opts.SecretSize = 10
 	}

+	if opts.Digits == 0 {
+		opts.Digits = otp.DigitsSix
+	}
+
 	// otpauth://totp/Example:alice@google.com?secret=JBSWY3DPEHPK3PXP&issuer=Example

 	v := url.Values{}
-	secret := make([]byte, opts.SecretSize)
-	_, err := rand.Read(secret)
-	if err != nil {
-		return nil, err
+	if len(opts.Secret) != 0 {
+		v.Set("secret", b32NoPadding.EncodeToString(opts.Secret))
+	} else {
+		secret := make([]byte, opts.SecretSize)
+		_, err := rand.Read(secret)
+		if err != nil {
+			return nil, err
+		}
+		v.Set("secret", b32NoPadding.EncodeToString(secret))
 	}

-	v.Set("secret", base32.StdEncoding.EncodeToString(secret))
 	v.Set("issuer", opts.Issuer)
 	v.Set("algorithm", opts.Algorithm.String())
 	v.Set("digits", opts.Digits.String())
--- a/vendor/github.com/pquerna/otp/otp.go
+++ b/vendor/github.com/pquerna/otp/otp.go
@ -54,17 +54,19 @@ type Key struct {
 // NewKeyFromURL creates a new Key from an TOTP or HOTP url.
 //
 // The URL format is documented here:
-//   https://code.google.com/p/google-authenticator/wiki/KeyUriFormat
+//   https://github.com/google/google-authenticator/wiki/Key-Uri-Format
 //
 func NewKeyFromURL(orig string) (*Key, error) {
-	u, err := url.Parse(orig)
+	s := strings.TrimSpace(orig)
+
+	u, err := url.Parse(s)

 	if err != nil {
 		return nil, err
 	}

 	return &Key{
-		orig: orig,
+		orig: s,
 		url:  u,
 	}, nil
 }
@ -136,6 +138,11 @@ func (k *Key) Secret() string {
 	return q.Get("secret")
 }

+// URL returns the OTP URL as a string
+func (k *Key) URL() string {
+	return k.url.String()
+}
+
 // Algorithm represents the hashing function to use in the HMAC
 // operation needed for OTPs.
 type Algorithm int
--- a/vendor/github.com/pquerna/otp/totp/totp.go
+++ b/vendor/github.com/pquerna/otp/totp/totp.go
@ -134,14 +134,18 @@ type GenerateOpts struct {
 	AccountName string
 	// Number of seconds a TOTP hash is valid for. Defaults to 30 seconds.
 	Period uint
-	// Size in size of the generated Secret. Defaults to 10 bytes.
+	// Size in size of the generated Secret. Defaults to 20 bytes.
 	SecretSize uint
+	// Secret to store. Defaults to a randomly generated secret of SecretSize.  You should generally leave this empty.
+	Secret []byte
 	// Digits to request. Defaults to 6.
 	Digits otp.Digits
 	// Algorithm to use for HMAC. Defaults to SHA1.
 	Algorithm otp.Algorithm
 }

+var b32NoPadding = base32.StdEncoding.WithPadding(base32.NoPadding)
+
 // Generate a new TOTP Key.
 func Generate(opts GenerateOpts) (*otp.Key, error) {
 	// url encode the Issuer/AccountName
@ -158,7 +162,7 @@ func Generate(opts GenerateOpts) (*otp.Key, error) {
 	}

 	if opts.SecretSize == 0 {
-		opts.SecretSize = 10
+		opts.SecretSize = 20
 	}

 	if opts.Digits == 0 {
@ -168,13 +172,17 @@ func Generate(opts GenerateOpts) (*otp.Key, error) {
 	// otpauth://totp/Example:alice@google.com?secret=JBSWY3DPEHPK3PXP&issuer=Example

 	v := url.Values{}
-	secret := make([]byte, opts.SecretSize)
-	_, err := rand.Read(secret)
-	if err != nil {
-		return nil, err
+	if len(opts.Secret) != 0 {
+		v.Set("secret", b32NoPadding.EncodeToString(opts.Secret))
+	} else {
+		secret := make([]byte, opts.SecretSize)
+		_, err := rand.Read(secret)
+		if err != nil {
+			return nil, err
+		}
+		v.Set("secret", b32NoPadding.EncodeToString(secret))
 	}

-	v.Set("secret", base32.StdEncoding.EncodeToString(secret))
 	v.Set("issuer", opts.Issuer)
 	v.Set("period", strconv.FormatUint(uint64(opts.Period), 10))
 	v.Set("algorithm", opts.Algorithm.String())
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@ -128,8 +128,7 @@ github.com/blevesearch/snowballstem/english
 github.com/blevesearch/zap/v11
 # github.com/blevesearch/zap/v12 v12.0.7
 github.com/blevesearch/zap/v12
-# github.com/boombuler/barcode v0.0.0-20161226211916-fe0f26ff6d26
-## explicit
+# github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc
 github.com/boombuler/barcode
 github.com/boombuler/barcode/qr
 github.com/boombuler/barcode/utils
@ -538,7 +537,7 @@ github.com/philhofer/fwd
 github.com/pkg/errors
 # github.com/pmezard/go-difflib v1.0.0
 github.com/pmezard/go-difflib/difflib
-# github.com/pquerna/otp v0.0.0-20160912161815-54653902c20e
+# github.com/pquerna/otp v1.2.0
 ## explicit
 github.com/pquerna/otp
 github.com/pquerna/otp/hotp