Preparations

.gitignore

@@ -55,3 +55,6 @@ docs/_build/
 
 # PyBuilder
 target/
+
+# Testing
+*.png

steginack.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+from PIL import Image
+import argparse
+
+
+def hideInFile(infile, hidefile, bits, outfile):
+    inim = Image.open(infile)
+    hideim = Image.open(hidefile)
+    assert inim.size == hideim.size, "Both image must be of the same size"
+    outim = Image.new('RGB', inim.size)
+    inim.close()
+    hideim.close()
+    outim.save(outfile, 'PNG')
+
+def inverseFile(infile, bits, outfile):
+    inim = Image.open(infile)
+    outim = Image.new('RGB', inim.size)
+    inim.close()
+    outim.save(outfile, 'PNG')
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description="Hide an image inside another and decode images")
+    parser.add_argument('infile', metavar='INFILE', type=str, help="Input file")
+    parser.add_argument('bits', metavar='BITS', type=int, help="Number of bits to use")
+    parser.add_argument('outfile', metavar='OUTFILE', type=str, help="Output file")
+    parser.add_argument('-s', '--hide', type=str, help="File to hide")
+    args = parser.parse_args()
+    if args.hide:
+        hideInFile(args.infile, args.hide, args.bits, args.outfile)
+    else:
+        inverseFile(args.infile, args.bits, args.outfile)