README
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stego
A simple package for image steganography
The repo contains a package for image steganography and main package which compiles to a command line tool for encoding and decoding messages in images
package usage
The package is well commented and most of it should be self explanatory.
It provides an interface for the distribution of data in an image called ´Scrambler´.
There are two exported function: Encode([]byte, image.Image, *Scrambler) (image.Image, error) and Decode(image.Image, *Scrambler) ([]byte, error).
Encode will encode the bytes in the image using the scrambler and return a new image.
Decode will decode the image using the scrambler and return a byte array with the decoded data
Both functions returns a StegoError if something goes wrong
Command line utility usage
Encodeing is done with stego encode <INPUT IMAGE PATH> [OUTPUT IMAGE PATH] [MESSAGE] where MESSAGE and OUTPUT IMAGE PATH are optional. If ommited, the message will be read from stdin and the resulting image will be forwarded to stdout.
Decoding are done with stego decode [INPUT IMAGE PATH] where INPUT IMAGE PATH are optional. If ommited the image to decode will be read from stdin.
Documentation
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Index ¶
Constants ¶
const ( SOH byte = 1 // Start of header STX byte = 2 // Start of text (end of header) )
Variables ¶
This section is empty.
Functions ¶
Types ¶
type Scrambler ¶
Scrambler is used to distribute data in an image, but an implementation should not alter the image itself.
The Init method should put the scrambler in a state from which Next should always generate the same sequence of results given the same image.
Next should return whichever pixel and colour channel that should be modified or read next. Calling next should always result in unique color coordinates (x, y and c), as long as it's not called more times than the capacity returned by Cap.
Cap should return the maximum number of times Next can be guaranteed to produce unique colour coordinates. If Init hasn't been called before Cap, Cap should return 0.
type StegoError ¶
type StegoError string
func (StegoError) Error ¶
func (e StegoError) Error() string
Source Files
Directories