From f9a3a4b3949dddecae413b97904c895b2cd887bf Mon Sep 17 00:00:00 2001
From: JoramWilander <jwawilander@gmail.com>
Date: Wed, 30 Mar 2016 12:49:29 -0400
Subject: Add MFA functionality

---
 .../mattermost/rsc/qr/libqrencode/qrencode.go      | 149 +++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 Godeps/_workspace/src/github.com/mattermost/rsc/qr/libqrencode/qrencode.go

(limited to 'Godeps/_workspace/src/github.com/mattermost/rsc/qr/libqrencode/qrencode.go')

diff --git a/Godeps/_workspace/src/github.com/mattermost/rsc/qr/libqrencode/qrencode.go b/Godeps/_workspace/src/github.com/mattermost/rsc/qr/libqrencode/qrencode.go
new file mode 100644
index 000000000..f4ce3ffb6
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/mattermost/rsc/qr/libqrencode/qrencode.go
@@ -0,0 +1,149 @@
+// Copyright 2011 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package libqrencode wraps the C libqrencode library.
+// The qr package (in this package's parent directory)
+// does not use any C wrapping.  This code is here only
+// for use during that package's tests.
+package libqrencode
+
+/*
+#cgo LDFLAGS: -lqrencode
+#include <qrencode.h>
+*/
+import "C"
+
+import (
+	"fmt"
+	"image"
+	"image/color"
+	"unsafe"
+)
+
+type Version int
+
+type Mode int
+
+const (
+	Numeric      Mode = C.QR_MODE_NUM
+	Alphanumeric Mode = C.QR_MODE_AN
+	EightBit     Mode = C.QR_MODE_8
+)
+
+type Level int
+
+const (
+	L Level = C.QR_ECLEVEL_L
+	M Level = C.QR_ECLEVEL_M
+	Q Level = C.QR_ECLEVEL_Q
+	H Level = C.QR_ECLEVEL_H
+)
+
+type Pixel int
+
+const (
+	Black Pixel = 1 << iota
+	DataECC
+	Format
+	PVersion
+	Timing
+	Alignment
+	Finder
+	NonData
+)
+
+type Code struct {
+	Version int
+	Width   int
+	Pixel   [][]Pixel
+	Scale   int
+}
+
+func (*Code) ColorModel() color.Model {
+	return color.RGBAModel
+}
+
+func (c *Code) Bounds() image.Rectangle {
+	d := (c.Width + 8) * c.Scale
+	return image.Rect(0, 0, d, d)
+}
+
+var (
+	white  color.Color = color.RGBA{0xFF, 0xFF, 0xFF, 0xFF}
+	black  color.Color = color.RGBA{0x00, 0x00, 0x00, 0xFF}
+	blue   color.Color = color.RGBA{0x00, 0x00, 0x80, 0xFF}
+	red    color.Color = color.RGBA{0xFF, 0x40, 0x40, 0xFF}
+	yellow color.Color = color.RGBA{0xFF, 0xFF, 0x00, 0xFF}
+	gray   color.Color = color.RGBA{0x80, 0x80, 0x80, 0xFF}
+	green  color.Color = color.RGBA{0x22, 0x8B, 0x22, 0xFF}
+)
+
+func (c *Code) At(x, y int) color.Color {
+	x = x/c.Scale - 4
+	y = y/c.Scale - 4
+	if 0 <= x && x < c.Width && 0 <= y && y < c.Width {
+		switch p := c.Pixel[y][x]; {
+		case p&Black == 0:
+			// nothing
+		case p&DataECC != 0:
+			return black
+		case p&Format != 0:
+			return blue
+		case p&PVersion != 0:
+			return red
+		case p&Timing != 0:
+			return yellow
+		case p&Alignment != 0:
+			return gray
+		case p&Finder != 0:
+			return green
+		}
+	}
+	return white
+}
+
+type Chunk struct {
+	Mode Mode
+	Text string
+}
+
+func Encode(version Version, level Level, mode Mode, text string) (*Code, error) {
+	return EncodeChunk(version, level, Chunk{mode, text})
+}
+
+func EncodeChunk(version Version, level Level, chunk ...Chunk) (*Code, error) {
+	qi, err := C.QRinput_new2(C.int(version), C.QRecLevel(level))
+	if qi == nil {
+		return nil, fmt.Errorf("QRinput_new2: %v", err)
+	}
+	defer C.QRinput_free(qi)
+	for _, ch := range chunk {
+		data := []byte(ch.Text)
+		n, err := C.QRinput_append(qi, C.QRencodeMode(ch.Mode), C.int(len(data)), (*C.uchar)(&data[0]))
+		if n < 0 {
+			return nil, fmt.Errorf("QRinput_append %q: %v", data, err)
+		}
+	}
+
+	qc, err := C.QRcode_encodeInput(qi)
+	if qc == nil {
+		return nil, fmt.Errorf("QRinput_encodeInput: %v", err)
+	}
+
+	c := &Code{
+		Version: int(qc.version),
+		Width:   int(qc.width),
+		Scale:   16,
+	}
+	pix := make([]Pixel, c.Width*c.Width)
+	cdat := (*[1000 * 1000]byte)(unsafe.Pointer(qc.data))[:len(pix)]
+	for i := range pix {
+		pix[i] = Pixel(cdat[i])
+	}
+	c.Pixel = make([][]Pixel, c.Width)
+	for i := range c.Pixel {
+		c.Pixel[i] = pix[i*c.Width : (i+1)*c.Width]
+	}
+	return c, nil
+}
-- 
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