stegmp.git, branch master

Fix typo

2019-01-27T19:55:02+00:00

Signed-off-by: Olivier Gayot

Fail if the format is not supported

2018-12-23T01:06:52+00:00

Signed-off-by: Olivier Gayot

write the algorithms to write to and read from the bitmap

2014-09-18T01:27:28+00:00

* now we can write to the LSBs of the bitmap using: $ ./stegmp write file.bmp input_file if input_file is "-", then then standard input will be handled * the same way, we can read the content of the-said LSBs using: $ ./stegmp read file.bmp Signed-off-by: Olivier Gayot

fix non persistent changes to file

2014-09-18T01:16:08+00:00

when using MAP_PRIVATE with mmap(), the content is not updated in the filesystem. Only the mapping is changed. fixed by replacing MAP_PRIVATE by MAP_SHARED Signed-off-by: Olivier Gayot

reader: do not map the pages as writable

2014-09-17T18:20:39+00:00

it is somehow insecure and useless to map the pages of the bitmap as writable if we only want to read data from it. Signed-off-by: Olivier Gayot

split the reading and writing features

2014-09-17T18:14:22+00:00

stegmp() now receives a file handler as second argument. if this one is non-null, then it is the file from which we need to read the input and write it back to the bitmap. if it is null, then we need to read from the bitmap and display back the data on the standard output Signed-off-by: Olivier Gayot

reader: read and parse a BMP headers

2014-09-17T17:41:53+00:00

we retrieve valuable information such as the data offset, the width and the height of the picture which path is passed as parameter. Signed-off-by: Olivier Gayot