libsteg

README

libsteg - Steganography Library in Go

This project was created as a means to further my learning of the Go programming language.

The library performs Least Significant Bit (LSB) Steganography on PNG images

Documentation

Index

• Variables
• func Base64Embed(imageB64In string, secret string) (imageB64Out string, err error)
• func Base64Extract(imageB64In string) (secret string, err error)
• func SetLoggingLevel(level logging.Level)
• type StegImage
  • func (s *StegImage) DoStegEmbed(secretIn string) (err error)
  • func (s *StegImage) DoStegExtract() (secretOut string, err error)
  • func (s *StegImage) LoadImageFromB64(b64Img string) (err error)
  • func (s *StegImage) LoadImageFromFile(imgPath string) error
  • func (s *StegImage) WriteNewImageToB64() (b64Img string, err error)
  • func (s *StegImage) WriteNewImageToFile(imgPath string) (err error)

Variables

var CleanB64Image = "" /* 78300-byte string literal not displayed */

CleanB64Image is the base64 string of a valid clean png file to be used in testing

Functions

func Base64Embed

func Base64Embed(imageB64In string, secret string) (imageB64Out string, err error)

Base64Embed performs a full base64 based embed

func Base64Extract

func Base64Extract(imageB64In string) (secret string, err error)

Base64Extract performs a full base64 based extract

func SetLoggingLevel

func SetLoggingLevel(level logging.Level)

SetLoggingLevel sets the libsteg logging level

Types

type StegImage

type StegImage struct {
	// contains filtered or unexported fields
}

StegImage type holds all vars needed for image manipulation

func (*StegImage) DoStegEmbed

func (s *StegImage) DoStegEmbed(secretIn string) (err error)

DoStegEmbed embeds the given secret into the loaded image

func (*StegImage) DoStegExtract

func (s *StegImage) DoStegExtract() (secretOut string, err error)

DoStegExtract retrieves the embedded secret from the loaded image

func (*StegImage) LoadImageFromB64

func (s *StegImage) LoadImageFromB64(b64Img string) (err error)

LoadImageFromB64 loads the given base64 encoded image into the StegImage structure

func (*StegImage) LoadImageFromFile

func (s *StegImage) LoadImageFromFile(imgPath string) error

LoadImageFromFile loads the given image into the StegImage structure

func (*StegImage) WriteNewImageToB64

func (s *StegImage) WriteNewImageToB64() (b64Img string, err error)

WriteNewImageToB64 base64 encodes the image held in StegImage.newImg and returns it as a string

func (*StegImage) WriteNewImageToFile

func (s *StegImage) WriteNewImageToFile(imgPath string) (err error)

WriteNewImageToFile outputs the image held in StegImage.newImg to the imgPath given