mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-11 18:14:15 +01:00
6dd096b7f0
* Initial commit for 2FA support Signed-off-by: Andrew <write@imaginarycode.com> * Add vendored files * Add missing depends * A few clean ups * Added improvements, proper encryption * Better encryption key * Simplify "key" generation * Make 2FA enrollment page more robust * Fix typo * Rename twofa/2FA to TwoFactor * UNIQUE INDEX -> UNIQUE
416 lines
15 KiB
Go
Vendored
416 lines
15 KiB
Go
Vendored
// Package qr can be used to create QR barcodes.
|
|
package qr
|
|
|
|
import (
|
|
"image"
|
|
|
|
"github.com/boombuler/barcode"
|
|
"github.com/boombuler/barcode/utils"
|
|
)
|
|
|
|
type encodeFn func(content string, eccLevel ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error)
|
|
|
|
// Encoding mode for QR Codes.
|
|
type Encoding byte
|
|
|
|
const (
|
|
// Auto will choose ths best matching encoding
|
|
Auto Encoding = iota
|
|
// Numeric encoding only encodes numbers [0-9]
|
|
Numeric
|
|
// AlphaNumeric encoding only encodes uppercase letters, numbers and [Space], $, %, *, +, -, ., /, :
|
|
AlphaNumeric
|
|
// Unicode encoding encodes the string as utf-8
|
|
Unicode
|
|
// only for testing purpose
|
|
unknownEncoding
|
|
)
|
|
|
|
func (e Encoding) getEncoder() encodeFn {
|
|
switch e {
|
|
case Auto:
|
|
return encodeAuto
|
|
case Numeric:
|
|
return encodeNumeric
|
|
case AlphaNumeric:
|
|
return encodeAlphaNumeric
|
|
case Unicode:
|
|
return encodeUnicode
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (e Encoding) String() string {
|
|
switch e {
|
|
case Auto:
|
|
return "Auto"
|
|
case Numeric:
|
|
return "Numeric"
|
|
case AlphaNumeric:
|
|
return "AlphaNumeric"
|
|
case Unicode:
|
|
return "Unicode"
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// Encode returns a QR barcode with the given content, error correction level and uses the given encoding
|
|
func Encode(content string, level ErrorCorrectionLevel, mode Encoding) (barcode.Barcode, error) {
|
|
bits, vi, err := mode.getEncoder()(content, level)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
blocks := splitToBlocks(bits.IterateBytes(), vi)
|
|
data := blocks.interleave(vi)
|
|
result := render(data, vi)
|
|
result.content = content
|
|
return result, nil
|
|
}
|
|
|
|
func render(data []byte, vi *versionInfo) *qrcode {
|
|
dim := vi.modulWidth()
|
|
results := make([]*qrcode, 8)
|
|
for i := 0; i < 8; i++ {
|
|
results[i] = newBarcode(dim)
|
|
}
|
|
|
|
occupied := newBarcode(dim)
|
|
|
|
setAll := func(x int, y int, val bool) {
|
|
occupied.Set(x, y, true)
|
|
for i := 0; i < 8; i++ {
|
|
results[i].Set(x, y, val)
|
|
}
|
|
}
|
|
|
|
drawFinderPatterns(vi, setAll)
|
|
drawAlignmentPatterns(occupied, vi, setAll)
|
|
|
|
//Timing Pattern:
|
|
var i int
|
|
for i = 0; i < dim; i++ {
|
|
if !occupied.Get(i, 6) {
|
|
setAll(i, 6, i%2 == 0)
|
|
}
|
|
if !occupied.Get(6, i) {
|
|
setAll(6, i, i%2 == 0)
|
|
}
|
|
}
|
|
// Dark Module
|
|
setAll(8, dim-8, true)
|
|
|
|
drawVersionInfo(vi, setAll)
|
|
drawFormatInfo(vi, -1, occupied.Set)
|
|
for i := 0; i < 8; i++ {
|
|
drawFormatInfo(vi, i, results[i].Set)
|
|
}
|
|
|
|
// Write the data
|
|
var curBitNo int
|
|
|
|
for pos := range iterateModules(occupied) {
|
|
var curBit bool
|
|
if curBitNo < len(data)*8 {
|
|
curBit = ((data[curBitNo/8] >> uint(7-(curBitNo%8))) & 1) == 1
|
|
} else {
|
|
curBit = false
|
|
}
|
|
|
|
for i := 0; i < 8; i++ {
|
|
setMasked(pos.X, pos.Y, curBit, i, results[i].Set)
|
|
}
|
|
curBitNo++
|
|
}
|
|
|
|
lowestPenalty := ^uint(0)
|
|
lowestPenaltyIdx := -1
|
|
for i := 0; i < 8; i++ {
|
|
p := results[i].calcPenalty()
|
|
if p < lowestPenalty {
|
|
lowestPenalty = p
|
|
lowestPenaltyIdx = i
|
|
}
|
|
}
|
|
return results[lowestPenaltyIdx]
|
|
}
|
|
|
|
func setMasked(x, y int, val bool, mask int, set func(int, int, bool)) {
|
|
switch mask {
|
|
case 0:
|
|
val = val != (((y + x) % 2) == 0)
|
|
break
|
|
case 1:
|
|
val = val != ((y % 2) == 0)
|
|
break
|
|
case 2:
|
|
val = val != ((x % 3) == 0)
|
|
break
|
|
case 3:
|
|
val = val != (((y + x) % 3) == 0)
|
|
break
|
|
case 4:
|
|
val = val != (((y/2 + x/3) % 2) == 0)
|
|
break
|
|
case 5:
|
|
val = val != (((y*x)%2)+((y*x)%3) == 0)
|
|
break
|
|
case 6:
|
|
val = val != ((((y*x)%2)+((y*x)%3))%2 == 0)
|
|
break
|
|
case 7:
|
|
val = val != ((((y+x)%2)+((y*x)%3))%2 == 0)
|
|
}
|
|
set(x, y, val)
|
|
}
|
|
|
|
func iterateModules(occupied *qrcode) <-chan image.Point {
|
|
result := make(chan image.Point)
|
|
allPoints := make(chan image.Point)
|
|
go func() {
|
|
curX := occupied.dimension - 1
|
|
curY := occupied.dimension - 1
|
|
isUpward := true
|
|
|
|
for true {
|
|
if isUpward {
|
|
allPoints <- image.Pt(curX, curY)
|
|
allPoints <- image.Pt(curX-1, curY)
|
|
curY--
|
|
if curY < 0 {
|
|
curY = 0
|
|
curX -= 2
|
|
if curX == 6 {
|
|
curX--
|
|
}
|
|
if curX < 0 {
|
|
break
|
|
}
|
|
isUpward = false
|
|
}
|
|
} else {
|
|
allPoints <- image.Pt(curX, curY)
|
|
allPoints <- image.Pt(curX-1, curY)
|
|
curY++
|
|
if curY >= occupied.dimension {
|
|
curY = occupied.dimension - 1
|
|
curX -= 2
|
|
if curX == 6 {
|
|
curX--
|
|
}
|
|
isUpward = true
|
|
if curX < 0 {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
close(allPoints)
|
|
}()
|
|
go func() {
|
|
for pt := range allPoints {
|
|
if !occupied.Get(pt.X, pt.Y) {
|
|
result <- pt
|
|
}
|
|
}
|
|
close(result)
|
|
}()
|
|
return result
|
|
}
|
|
|
|
func drawFinderPatterns(vi *versionInfo, set func(int, int, bool)) {
|
|
dim := vi.modulWidth()
|
|
drawPattern := func(xoff int, yoff int) {
|
|
for x := -1; x < 8; x++ {
|
|
for y := -1; y < 8; y++ {
|
|
val := (x == 0 || x == 6 || y == 0 || y == 6 || (x > 1 && x < 5 && y > 1 && y < 5)) && (x <= 6 && y <= 6 && x >= 0 && y >= 0)
|
|
|
|
if x+xoff >= 0 && x+xoff < dim && y+yoff >= 0 && y+yoff < dim {
|
|
set(x+xoff, y+yoff, val)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
drawPattern(0, 0)
|
|
drawPattern(0, dim-7)
|
|
drawPattern(dim-7, 0)
|
|
}
|
|
|
|
func drawAlignmentPatterns(occupied *qrcode, vi *versionInfo, set func(int, int, bool)) {
|
|
drawPattern := func(xoff int, yoff int) {
|
|
for x := -2; x <= 2; x++ {
|
|
for y := -2; y <= 2; y++ {
|
|
val := x == -2 || x == 2 || y == -2 || y == 2 || (x == 0 && y == 0)
|
|
set(x+xoff, y+yoff, val)
|
|
}
|
|
}
|
|
}
|
|
positions := vi.alignmentPatternPlacements()
|
|
|
|
for _, x := range positions {
|
|
for _, y := range positions {
|
|
if occupied.Get(x, y) {
|
|
continue
|
|
}
|
|
drawPattern(x, y)
|
|
}
|
|
}
|
|
}
|
|
|
|
var formatInfos = map[ErrorCorrectionLevel]map[int][]bool{
|
|
L: {
|
|
0: []bool{true, true, true, false, true, true, true, true, true, false, false, false, true, false, false},
|
|
1: []bool{true, true, true, false, false, true, false, true, true, true, true, false, false, true, true},
|
|
2: []bool{true, true, true, true, true, false, true, true, false, true, false, true, false, true, false},
|
|
3: []bool{true, true, true, true, false, false, false, true, false, false, true, true, true, false, true},
|
|
4: []bool{true, true, false, false, true, true, false, false, false, true, false, true, true, true, true},
|
|
5: []bool{true, true, false, false, false, true, true, false, false, false, true, true, false, false, false},
|
|
6: []bool{true, true, false, true, true, false, false, false, true, false, false, false, false, false, true},
|
|
7: []bool{true, true, false, true, false, false, true, false, true, true, true, false, true, true, false},
|
|
},
|
|
M: {
|
|
0: []bool{true, false, true, false, true, false, false, false, false, false, true, false, false, true, false},
|
|
1: []bool{true, false, true, false, false, false, true, false, false, true, false, false, true, false, true},
|
|
2: []bool{true, false, true, true, true, true, false, false, true, true, true, true, true, false, false},
|
|
3: []bool{true, false, true, true, false, true, true, false, true, false, false, true, false, true, true},
|
|
4: []bool{true, false, false, false, true, false, true, true, true, true, true, true, false, false, true},
|
|
5: []bool{true, false, false, false, false, false, false, true, true, false, false, true, true, true, false},
|
|
6: []bool{true, false, false, true, true, true, true, true, false, false, true, false, true, true, true},
|
|
7: []bool{true, false, false, true, false, true, false, true, false, true, false, false, false, false, false},
|
|
},
|
|
Q: {
|
|
0: []bool{false, true, true, false, true, false, true, false, true, false, true, true, true, true, true},
|
|
1: []bool{false, true, true, false, false, false, false, false, true, true, false, true, false, false, false},
|
|
2: []bool{false, true, true, true, true, true, true, false, false, true, true, false, false, false, true},
|
|
3: []bool{false, true, true, true, false, true, false, false, false, false, false, false, true, true, false},
|
|
4: []bool{false, true, false, false, true, false, false, true, false, true, true, false, true, false, false},
|
|
5: []bool{false, true, false, false, false, false, true, true, false, false, false, false, false, true, true},
|
|
6: []bool{false, true, false, true, true, true, false, true, true, false, true, true, false, true, false},
|
|
7: []bool{false, true, false, true, false, true, true, true, true, true, false, true, true, false, true},
|
|
},
|
|
H: {
|
|
0: []bool{false, false, true, false, true, true, false, true, false, false, false, true, false, false, true},
|
|
1: []bool{false, false, true, false, false, true, true, true, false, true, true, true, true, true, false},
|
|
2: []bool{false, false, true, true, true, false, false, true, true, true, false, false, true, true, true},
|
|
3: []bool{false, false, true, true, false, false, true, true, true, false, true, false, false, false, false},
|
|
4: []bool{false, false, false, false, true, true, true, false, true, true, false, false, false, true, false},
|
|
5: []bool{false, false, false, false, false, true, false, false, true, false, true, false, true, false, true},
|
|
6: []bool{false, false, false, true, true, false, true, false, false, false, false, true, true, false, false},
|
|
7: []bool{false, false, false, true, false, false, false, false, false, true, true, true, false, true, true},
|
|
},
|
|
}
|
|
|
|
func drawFormatInfo(vi *versionInfo, usedMask int, set func(int, int, bool)) {
|
|
var formatInfo []bool
|
|
|
|
if usedMask == -1 {
|
|
formatInfo = []bool{true, true, true, true, true, true, true, true, true, true, true, true, true, true, true} // Set all to true cause -1 --> occupied mask.
|
|
} else {
|
|
formatInfo = formatInfos[vi.Level][usedMask]
|
|
}
|
|
|
|
if len(formatInfo) == 15 {
|
|
dim := vi.modulWidth()
|
|
set(0, 8, formatInfo[0])
|
|
set(1, 8, formatInfo[1])
|
|
set(2, 8, formatInfo[2])
|
|
set(3, 8, formatInfo[3])
|
|
set(4, 8, formatInfo[4])
|
|
set(5, 8, formatInfo[5])
|
|
set(7, 8, formatInfo[6])
|
|
set(8, 8, formatInfo[7])
|
|
set(8, 7, formatInfo[8])
|
|
set(8, 5, formatInfo[9])
|
|
set(8, 4, formatInfo[10])
|
|
set(8, 3, formatInfo[11])
|
|
set(8, 2, formatInfo[12])
|
|
set(8, 1, formatInfo[13])
|
|
set(8, 0, formatInfo[14])
|
|
|
|
set(8, dim-1, formatInfo[0])
|
|
set(8, dim-2, formatInfo[1])
|
|
set(8, dim-3, formatInfo[2])
|
|
set(8, dim-4, formatInfo[3])
|
|
set(8, dim-5, formatInfo[4])
|
|
set(8, dim-6, formatInfo[5])
|
|
set(8, dim-7, formatInfo[6])
|
|
set(dim-8, 8, formatInfo[7])
|
|
set(dim-7, 8, formatInfo[8])
|
|
set(dim-6, 8, formatInfo[9])
|
|
set(dim-5, 8, formatInfo[10])
|
|
set(dim-4, 8, formatInfo[11])
|
|
set(dim-3, 8, formatInfo[12])
|
|
set(dim-2, 8, formatInfo[13])
|
|
set(dim-1, 8, formatInfo[14])
|
|
}
|
|
}
|
|
|
|
var versionInfoBitsByVersion = map[byte][]bool{
|
|
7: []bool{false, false, false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false},
|
|
8: []bool{false, false, true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false},
|
|
9: []bool{false, false, true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true},
|
|
10: []bool{false, false, true, false, true, false, false, true, false, false, true, true, false, true, false, false, true, true},
|
|
11: []bool{false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, true, true, false},
|
|
12: []bool{false, false, true, true, false, false, false, true, true, true, false, true, true, false, false, false, true, false},
|
|
13: []bool{false, false, true, true, false, true, true, false, false, false, false, true, false, false, false, true, true, true},
|
|
14: []bool{false, false, true, true, true, false, false, true, true, false, false, false, false, false, true, true, false, true},
|
|
15: []bool{false, false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false, false},
|
|
16: []bool{false, true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false, false},
|
|
17: []bool{false, true, false, false, false, true, false, true, false, false, false, true, false, true, true, true, false, true},
|
|
18: []bool{false, true, false, false, true, false, true, false, true, false, false, false, false, true, false, true, true, true},
|
|
19: []bool{false, true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true, false},
|
|
20: []bool{false, true, false, true, false, false, true, false, false, true, true, false, true, false, false, true, true, false},
|
|
21: []bool{false, true, false, true, false, true, false, true, true, false, true, false, false, false, false, false, true, true},
|
|
22: []bool{false, true, false, true, true, false, true, false, false, false, true, true, false, false, true, false, false, true},
|
|
23: []bool{false, true, false, true, true, true, false, true, true, true, true, true, true, false, true, true, false, false},
|
|
24: []bool{false, true, true, false, false, false, true, true, true, false, true, true, false, false, false, true, false, false},
|
|
25: []bool{false, true, true, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true},
|
|
26: []bool{false, true, true, false, true, false, true, true, true, true, true, false, true, false, true, false, true, true},
|
|
27: []bool{false, true, true, false, true, true, false, false, false, false, true, false, false, false, true, true, true, false},
|
|
28: []bool{false, true, true, true, false, false, true, true, false, false, false, false, false, true, true, false, true, false},
|
|
29: []bool{false, true, true, true, false, true, false, false, true, true, false, false, true, true, true, true, true, true},
|
|
30: []bool{false, true, true, true, true, false, true, true, false, true, false, true, true, true, false, true, false, true},
|
|
31: []bool{false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false, false, false},
|
|
32: []bool{true, false, false, false, false, false, true, false, false, true, true, true, false, true, false, true, false, true},
|
|
33: []bool{true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false, false, false},
|
|
34: []bool{true, false, false, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false},
|
|
35: []bool{true, false, false, false, true, true, false, true, true, true, true, false, false, true, true, true, true, true},
|
|
36: []bool{true, false, false, true, false, false, true, false, true, true, false, false, false, false, true, false, true, true},
|
|
37: []bool{true, false, false, true, false, true, false, true, false, false, false, false, true, false, true, true, true, false},
|
|
38: []bool{true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true, false, false},
|
|
39: []bool{true, false, false, true, true, true, false, true, false, true, false, true, false, false, false, false, false, true},
|
|
40: []bool{true, false, true, false, false, false, true, true, false, false, false, true, true, false, true, false, false, true},
|
|
}
|
|
|
|
func drawVersionInfo(vi *versionInfo, set func(int, int, bool)) {
|
|
versionInfoBits, ok := versionInfoBitsByVersion[vi.Version]
|
|
|
|
if ok && len(versionInfoBits) > 0 {
|
|
for i := 0; i < len(versionInfoBits); i++ {
|
|
x := (vi.modulWidth() - 11) + i%3
|
|
y := i / 3
|
|
set(x, y, versionInfoBits[len(versionInfoBits)-i-1])
|
|
set(y, x, versionInfoBits[len(versionInfoBits)-i-1])
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
func addPaddingAndTerminator(bl *utils.BitList, vi *versionInfo) {
|
|
for i := 0; i < 4 && bl.Len() < vi.totalDataBytes()*8; i++ {
|
|
bl.AddBit(false)
|
|
}
|
|
|
|
for bl.Len()%8 != 0 {
|
|
bl.AddBit(false)
|
|
}
|
|
|
|
for i := 0; bl.Len() < vi.totalDataBytes()*8; i++ {
|
|
if i%2 == 0 {
|
|
bl.AddByte(236)
|
|
} else {
|
|
bl.AddByte(17)
|
|
}
|
|
}
|
|
}
|