dat2img

package

v0.0.0-...-fde3359 Latest Latest Go to latest Published: Oct 30, 2025 License: Apache-2.0 Imports: 15 Imported by: 0

Details

Valid go.mod file
Redistributable license
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Stable version
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Repository

gitee.com/wanjian325/chatlog

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Documentation ¶

Index ¶

Constants
Variables
func Add2Trak(init *mp4.InitSegment, frag *mp4.Fragment, index int, data [][]byte) error
func Convert2JPG(data []byte) ([]byte, error)
func ConvertAnime2GIF(animeFrames [][]byte, maskFrames [][]byte) ([]byte, error)
func Dat2Image(data []byte) ([]byte, string, error)
func Dat2ImageV4(data []byte, aeskey []byte) ([]byte, string, error)
func ScanAndSetXorKey(dirPath string) (byte, error)
func SetAesKey(key string)
func Transmux2MP4(data []byte) ([]byte, error)
func TransmuxAnime2MP4(animeFrames [][]byte, maskFrames [][]byte) ([]byte, error)
func Wxam2pic(data []byte) ([]byte, string, error)
type AesKeyValidator
- func NewImgKeyValidator(path string) *AesKeyValidator
- func (v *AesKeyValidator) Validate(key []byte) bool
type Format
type Partition
type Partitions
- func (p *Partitions) LikeAnime() bool

Constants ¶

View Source

const (
	ENV_FFMPEG_PATH = "FFMPEG_PATH"
	MinRatio        = 0.6
	FixSliceHeaders = true
)

Variables ¶

View Source

var (
	// Common image format definitions
	JPG     = Format{Header: []byte{0xFF, 0xD8, 0xFF}, Ext: "jpg"}
	PNG     = Format{Header: []byte{0x89, 0x50, 0x4E, 0x47}, Ext: "png"}
	GIF     = Format{Header: []byte{0x47, 0x49, 0x46, 0x38}, Ext: "gif"}
	TIFF    = Format{Header: []byte{0x49, 0x49, 0x2A, 0x00}, Ext: "tiff"}
	BMP     = Format{Header: []byte{0x42, 0x4D}, Ext: "bmp"}
	WXGF    = Format{Header: []byte{0x77, 0x78, 0x67, 0x66}, Ext: "wxgf"}
	Formats = []Format{JPG, PNG, GIF, TIFF, BMP, WXGF}

	V4Format1 = Format{Header: []byte{0x07, 0x08, 0x56, 0x31}, AesKey: []byte("cfcd208495d565ef")}
	V4Format2 = Format{Header: []byte{0x07, 0x08, 0x56, 0x32}, AesKey: []byte("0000000000000000")} // FIXME
	V4Formats = []*Format{&V4Format1, &V4Format2}

	// WeChat v4 related constants
	V4XorKey byte = 0x37               // Default XOR key for WeChat v4 dat files
	JpgTail       = []byte{0xFF, 0xD9} // JPG file tail marker
)

View Source

var (
	FFmpegMode = false
	FFMpegPath = "ffmpeg"
)

Functions ¶

func Add2Trak ¶

func Add2Trak(init *mp4.InitSegment, frag *mp4.Fragment, index int, data [][]byte) error

func Convert2JPG ¶

func Convert2JPG(data []byte) ([]byte, error)

func ConvertAnime2GIF ¶

func ConvertAnime2GIF(animeFrames [][]byte, maskFrames [][]byte) ([]byte, error)

ConvertAnime2GIF convert anime frames and mask frames to mp4 FIXME No longer need to write to temporary files

func Dat2Image ¶

func Dat2Image(data []byte) ([]byte, string, error)

Dat2Image converts WeChat dat file data to image data Returns the decoded image data, file extension, and any error encountered

func Dat2ImageV4 ¶

func Dat2ImageV4(data []byte, aeskey []byte) ([]byte, string, error)

Dat2ImageV4 processes WeChat v4 dat image files WeChat v4 uses a combination of AES-ECB and XOR encryption

func ScanAndSetXorKey ¶

func ScanAndSetXorKey(dirPath string) (byte, error)

ScanAndSetXorKey scans a directory for "_t.dat" files to calculate and set the global XOR key for WeChat v4 dat files Returns the found key and any error encountered

func SetAesKey ¶

func SetAesKey(key string)

func Transmux2MP4 ¶

func Transmux2MP4(data []byte) ([]byte, error)

func TransmuxAnime2MP4 ¶

func TransmuxAnime2MP4(animeFrames [][]byte, maskFrames [][]byte) ([]byte, error)

func Wxam2pic ¶

func Wxam2pic(data []byte) ([]byte, string, error)

Types ¶

type AesKeyValidator ¶

type AesKeyValidator struct {
	Path          string
	EncryptedData []byte
}

func NewImgKeyValidator ¶

func NewImgKeyValidator(path string) *AesKeyValidator

func (*AesKeyValidator) Validate ¶

func (v *AesKeyValidator) Validate(key []byte) bool

type Format ¶

type Format struct {
	Header []byte
	AesKey []byte
	Ext    string
}

Format defines the header and extension for different image types

type Partition ¶

type Partition struct {
	Offset int
	Size   int
	Ratio  float64
}

type Partitions ¶

type Partitions struct {
	Partitions []Partition
	MaxRatio   float64
	MaxIndex   int
}

func (*Partitions) LikeAnime ¶

func (p *Partitions) LikeAnime() bool

Source Files ¶

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