PNG Image Steganography with libpng

Grant Curell

Rate me:

4.96/5 (16 votes)

22 Apr 2013GPL317 min read

61.6K

4.8K

Performing steganography on PNG images

PNG_stego.zip
- PNG_stego
  - Debug
  - LIB Debug
  - libpng-1.2.37-src
    - aclocal.m4
    - ANNOUNCE
    - autogen.sh
    - CHANGES
    - config.guess
    - config.h.in
    - config.sub
    - configure
    - configure.ac
    - contrib
      - gregbook
        
        COPYING
        
        LICENSE
        
        Makefile.mingw32
        
        Makefile.sgi
        
        Makefile.unx
        
        Makefile.w32
        
        makevms.com
        
        README
        
        readpng.c
        
        readpng.h
        
        readpng2.c
        
        readpng2.h
        
        readppm.c
        
        rpng2-win.c
        
        rpng2-x.c
        
        rpng-win.c
        
        rpng-x.c
        
        toucan.png
        
        wpng.c
        
        writepng.c
        
        writepng.h
      - pngminim
        
        decoder
        
        gather.sh
        
        makefile
        
        pngusr.h
        
        README
        
        encoder
        
        dummy_inflate.c
        
        gather.sh
        
        makefile
        
        pngusr.h
        
        README
        
        preader
        
        gather.sh
        
        makefile
        
        pngusr.h
        
        README
      - pngminus
        
        makefile.std
        
        makefile.tc3
        
        makevms.com
        
        png2pnm.bat
        
        png2pnm.c
        
        png2pnm.sh
        
        pngminus.bat
        
        pngminus.sh
        
        pnm2png.bat
        
        pnm2png.c
        
        pnm2png.sh
        
        README
      - pngsuite
        
        basn0g01.png
        
        basn0g02.png
        
        basn0g04.png
        
        basn0g08.png
        
        basn0g16.png
        
        basn2c08.png
        
        basn2c16.png
        
        basn3p01.png
        
        basn3p02.png
        
        basn3p04.png
        
        basn3p08.png
        
        basn4a08.png
        
        basn4a16.png
        
        basn6a08.png
        
        basn6a16.png
        
        README
      - visupng
        
        cexcept.h
        
        PngFile.c
        
        PngFile.h
        
        README.txt
        
        resource.h
        
        VisualPng.c
        
        VisualPng.dsp
        
        VisualPng.dsw
        
        VisualPng.ico
        
        VisualPng.png
        
        VisualPng.rc
    - depcomp
    - example.c
    - INSTALL
    - install-sh
    - KNOWNBUG
    - libpng.3
    - libpng-1.2.37.txt
    - libpngpf.3
    - LICENSE
    - ltmain.sh
    - Makefile.am
    - Makefile.in
    - missing
    - mkinstalldirs
    - png.5
    - png.c
    - png.h
    - pngbar.jpg
    - pngbar.png
    - pngconf.h
    - pngerror.c
    - pnggccrd.c
    - pngget.c
    - pngmem.c
    - pngnow.png
    - pngpread.c
    - pngread.c
    - pngrio.c
    - pngrtran.c
    - pngrutil.c
    - pngset.c
    - pngtest.c
    - pngtest.png
    - pngtrans.c
    - pngvcrd.c
    - pngwio.c
    - pngwrite.c
    - pngwtran.c
    - pngwutil.c
    - projects
      - _UpgradeReport_Files
        
        UpgradeReport.css
        
        UpgradeReport.xslt
        
        UpgradeReport_Error.png
        
        UpgradeReport_Information.png
        
        UpgradeReport_Minus.gif
        
        UpgradeReport_Plus.gif
        
        UpgradeReport_Success.png
        
        UpgradeReport_Warning.png
      - LIB Debug
        
        cl.command.1.tlog
        
        CL.read.1.tlog
        
        CL.write.1.tlog
        
        libpng.lastbuildstate
        
        libpng.log
        
        libpng.unsuccessfulbuild
      - VS2012
        
        LIB Debug
        
        libpng.Build.CppClean.log
        
        libpng.log
        
        libpng.suo
        
        libpng.v11.suo
        
        libpng.vcproj
        
        libpng.vcxproj
        
        libpng.vcxproj.filters
        
        libpng.vcxproj.user
        
        netware.txt
        
        PRJ0041.mak
        
        README.txt
        
        README_zlib.txt
        
        wince.txt
    - README
    - scripts
      - CMakeLists.txt
      - descrip.mms
      - libpng.icc
      - libpng.pc.in
      - libpng.pc-configure.in
      - libpng-config.in
      - libpng-config-body.in
      - libpng-config-head.in
      - makefile.32sunu
      - makefile.64sunu
      - makefile.acorn
      - makefile.aix
      - makefile.amiga
      - makefile.atari
      - makefile.bc32
      - makefile.beos
      - makefile.bor
      - makefile.cygwin
      - makefile.darwin
      - makefile.dec
      - makefile.dj2
      - makefile.elf
      - makefile.freebsd
      - makefile.gcc
      - makefile.gcmmx
      - makefile.hp64
      - makefile.hpgcc
      - makefile.hpux
      - makefile.ibmc
      - makefile.intel
      - makefile.knr
      - makefile.linux
      - makefile.mingw
      - makefile.mips
      - makefile.msc
      - makefile.ne12bsd
      - makefile.netbsd
      - makefile.nommx
      - makefile.openbsd
      - makefile.os2
      - makefile.sco
      - makefile.sggcc
      - makefile.sgi
      - makefile.so9
      - makefile.solaris
      - makefile.solaris-x86
      - makefile.std
      - makefile.sunos
      - makefile.tc3
      - makefile.vcawin32
      - makefile.vcwin32
      - makefile.watcom
      - makevms.com
      - pngos2.def
      - pngw32.def
      - pngw32.rc
      - SCOPTIONS.ppc
      - smakefile.ppc
    - test-pngtest.sh
    - TODO
    - Y2KINFO
  - PNG_encode_decode
    - Debug
      - PNG_encode_decode.Build.CppClean.log
      - PNG_encode_decode.log
    - encode.cpp
    - link.png
    - main.cpp
    - PNG_encode_decode.vcxproj
    - PNG_encode_decode.vcxproj.filters
    - PNG_file.cpp
    - PNG_file.h
    - small.png
  - PNG_stego.sln
  - PNG_stego.v11.suo
  - zlib-1.2.3
    - adler32.c
    - algorithm.txt
    - amiga
      - Makefile.pup
      - Makefile.sas
    - as400
      - bndsrc
      - compile.clp
      - readme.txt
      - zlib.inc
    - ChangeLog
    - check.log
    - compress.c
    - configure
    - contrib
      - ada
        
        buffer_demo.adb
        
        mtest.adb
        
        read.adb
        
        readme.txt
        
        test.adb
        
        zlib.adb
        
        zlib.ads
        
        zlib.gpr
        
        zlib-streams.adb
        
        zlib-streams.ads
        
        zlib-thin.adb
        
        zlib-thin.ads
      - asm586
        
        match.S
        
        README.586
      - asm686
        
        match.S
        
        README.686
      - blast
        
        blast.c
        
        blast.h
        
        Makefile
        
        README
        
        test.pk
        
        test.txt
      - delphi
        
        readme.txt
        
        ZLib.pas
        
        ZLibConst.pas
        
        zlibd32.mak
      - dotzlib
        
        DotZLib.build
        
        DotZLib.chm
        
        DotZLib.sln
        
        DotZLib
        
        AssemblyInfo.cs
        
        ChecksumImpl.cs
        
        CircularBuffer.cs
        
        CodecBase.cs
        
        Deflater.cs
        
        DotZLib.cs
        
        DotZLib.csproj
        
        GZipStream.cs
        
        Inflater.cs
        
        UnitTests.cs
        
        LICENSE_1_0.txt
        
        readme.txt
      - infback9
        
        infback9.c
        
        infback9.h
        
        inffix9.h
        
        inflate9.h
        
        inftree9.c
        
        inftree9.h
        
        README
      - inflate86
        
        inffas86.c
        
        inffast.S
      - iostream
        
        test.cpp
        
        zfstream.cpp
        
        zfstream.h
      - iostream2
        
        zstream.h
        
        zstream_test.cpp
      - iostream3
        
        README
        
        test.cc
        
        TODO
        
        zfstream.cc
        
        zfstream.h
      - masm686
        
        match.asm
      - masmx64
        
        bld_ml64.bat
        
        gvmat64.asm
        
        gvmat64.obj
        
        inffas8664.c
        
        inffasx64.asm
        
        inffasx64.obj
        
        readme.txt
      - masmx86
        
        bld_ml32.bat
        
        gvmat32.asm
        
        gvmat32.obj
        
        gvmat32c.c
        
        inffas32.asm
        
        inffas32.obj
        
        mkasm.bat
        
        readme.txt
      - minizip
        
        ChangeLogUnzip
        
        crypt.h
        
        ioapi.c
        
        ioapi.h
        
        iowin32.c
        
        iowin32.h
        
        Makefile
        
        miniunz.c
        
        minizip.c
        
        mztools.c
        
        mztools.h
        
        unzip.c
        
        unzip.h
        
        zip.c
        
        zip.h
      - pascal
        
        example.pas
        
        readme.txt
        
        zlibd32.mak
        
        zlibpas.pas
      - puff
        
        Makefile
        
        puff.c
        
        puff.h
        
        README
        
        zeros.raw
      - README.contrib
      - testzlib
        
        testzlib.c
        
        testzlib.txt
      - untgz
        
        Makefile
        
        Makefile.msc
        
        untgz.c
      - vstudio
        
        readme.txt
        
        vc7
        
        miniunz.vcproj
        
        minizip.vcproj
        
        testzlib.vcproj
        
        zlib.rc
        
        zlibstat.vcproj
        
        zlibvc.def
        
        zlibvc.sln
        
        zlibvc.vcproj
        
        vc8
        
        miniunz.vcproj
        
        minizip.vcproj
        
        testzlib.vcproj
        
        testzlibdll.vcproj
        
        zlib.rc
        
        zlibstat.vcproj
        
        zlibvc.def
        
        zlibvc.sln
        
        zlibvc.vcproj
    - crc32.c
    - crc32.h
    - deflate.c
    - deflate.h
    - example.c
    - example-res.rc
    - examples
      - fitblk.c
      - gun.c
      - gzappend.c
      - gzjoin.c
      - gzlog.c
      - gzlog.h
      - README.examples
      - zlib_how.html
      - zpipe.c
      - zran.c
    - example-static-res.rc
    - FAQ
    - gzio.c
    - INDEX
    - infback.c
    - inffast.c
    - inffast.h
    - inffixed.h
    - inflate.c
    - inflate.h
    - inftrees.c
    - inftrees.h
    - make_vms.com
    - Makefile
    - Makefile.in
    - minigzip.c
    - minigzip-res.rc
    - minigzip-static-res.rc
    - msdos
      - Makefile.bor
      - Makefile.dj2
      - Makefile.emx
      - Makefile.msc
      - Makefile.tc
    - old
      - descrip.mms
      - Makefile.riscos
      - os2
        
        Makefile.os2
        
        zlib.def
      - README
      - visual-basic.txt
      - zlib.html
    - patches
      - foo.gz
      - zlib.ico
      - zlib-1.2.2.diff
      - zlib-1.2.2.diff.log
      - zlib-1.2.3.diff
      - zlib-dllversion.c
      - zlib-ltversion
    - projects
      - VS2012
        
        example.dsp
        
        LIB Debug
        
        zlib.Build.CppClean.log
        
        zlib.log
        
        minigzip.dsp
        
        README.txt
        
        Win32_LIB_Debug
        
        vc110.idb
        
        zlib.dsp
        
        zlib.dsw
        
        zlib.vcxproj
        
        zlib.vcxproj.filters
        
        zlib.vcxproj.user
    - qnx
      - package.qpg
    - README
    - trees.c
    - trees.h
    - uncompr.c
    - win32
      - DLL_FAQ.txt
      - Makefile.bor
      - Makefile.emx
      - Makefile.gcc
      - Makefile.msc
      - VisualC.txt
      - zlib.def
      - zlib1.rc
    - zconf.h
    - zconf.in.h
    - zlib.3
    - zlib.h
    - zlib.ico
    - zlib-dll-res.rc
    - zlib-dllversion.c
    - zlib-ltversion
    - zutil.c
    - zutil.h
libpng_windows_source.zip
- libpng-1.2.37-src
  - aclocal.m4
  - ANNOUNCE
  - autogen.sh
  - CHANGES
  - config.guess
  - config.h.in
  - config.sub
  - configure
  - configure.ac
  - contrib
    - gregbook
      - COPYING
      - LICENSE
      - Makefile.mingw32
      - Makefile.sgi
      - Makefile.unx
      - Makefile.w32
      - makevms.com
      - README
      - readpng.c
      - readpng.h
      - readpng2.c
      - readpng2.h
      - readppm.c
      - rpng2-win.c
      - rpng2-x.c
      - rpng-win.c
      - rpng-x.c
      - toucan.png
      - wpng.c
      - writepng.c
      - writepng.h
    - pngminim
      - decoder
        
        gather.sh
        
        makefile
        
        pngusr.h
        
        README
      - encoder
        
        dummy_inflate.c
        
        gather.sh
        
        makefile
        
        pngusr.h
        
        README
      - preader
        
        gather.sh
        
        makefile
        
        pngusr.h
        
        README
    - pngminus
      - makefile.std
      - makefile.tc3
      - makevms.com
      - png2pnm.bat
      - png2pnm.c
      - png2pnm.sh
      - pngminus.bat
      - pngminus.sh
      - pnm2png.bat
      - pnm2png.c
      - pnm2png.sh
      - README
    - pngsuite
      - basn0g01.png
      - basn0g02.png
      - basn0g04.png
      - basn0g08.png
      - basn0g16.png
      - basn2c08.png
      - basn2c16.png
      - basn3p01.png
      - basn3p02.png
      - basn3p04.png
      - basn3p08.png
      - basn4a08.png
      - basn4a16.png
      - basn6a08.png
      - basn6a16.png
      - README
    - visupng
      - cexcept.h
      - PngFile.c
      - PngFile.h
      - README.txt
      - resource.h
      - VisualPng.c
      - VisualPng.dsp
      - VisualPng.dsw
      - VisualPng.ico
      - VisualPng.png
      - VisualPng.rc
  - depcomp
  - example.c
  - INSTALL
  - install-sh
  - KNOWNBUG
  - libpng.3
  - libpng-1.2.37.txt
  - libpngpf.3
  - LICENSE
  - ltmain.sh
  - Makefile.am
  - Makefile.in
  - missing
  - mkinstalldirs
  - png.5
  - png.c
  - png.h
  - pngbar.jpg
  - pngbar.png
  - pngconf.h
  - pngerror.c
  - pnggccrd.c
  - pngget.c
  - pngmem.c
  - pngnow.png
  - pngpread.c
  - pngread.c
  - pngrio.c
  - pngrtran.c
  - pngrutil.c
  - pngset.c
  - pngtest.c
  - pngtest.png
  - pngtrans.c
  - pngvcrd.c
  - pngwio.c
  - pngwrite.c
  - pngwtran.c
  - pngwutil.c
  - projects
    - _UpgradeReport_Files
      - UpgradeReport.css
      - UpgradeReport.xslt
      - UpgradeReport_Error.png
      - UpgradeReport_Information.png
      - UpgradeReport_Minus.gif
      - UpgradeReport_Plus.gif
      - UpgradeReport_Success.png
      - UpgradeReport_Warning.png
    - LIB Debug
      - cl.command.1.tlog
      - CL.read.1.tlog
      - CL.write.1.tlog
      - libpng.lastbuildstate
      - libpng.log
      - libpng.unsuccessfulbuild
    - VS2012
      - LIB Debug
        
        libpng.Build.CppClean.log
        
        libpng.log
      - libpng.suo
      - libpng.v11.suo
      - libpng.vcproj
      - libpng.vcxproj
      - libpng.vcxproj.filters
      - libpng.vcxproj.user
      - netware.txt
      - PRJ0041.mak
      - README.txt
      - README_zlib.txt
      - wince.txt
  - README
  - scripts
    - CMakeLists.txt
    - descrip.mms
    - libpng.icc
    - libpng.pc.in
    - libpng.pc-configure.in
    - libpng-config.in
    - libpng-config-body.in
    - libpng-config-head.in
    - makefile.32sunu
    - makefile.64sunu
    - makefile.acorn
    - makefile.aix
    - makefile.amiga
    - makefile.atari
    - makefile.bc32
    - makefile.beos
    - makefile.bor
    - makefile.cygwin
    - makefile.darwin
    - makefile.dec
    - makefile.dj2
    - makefile.elf
    - makefile.freebsd
    - makefile.gcc
    - makefile.gcmmx
    - makefile.hp64
    - makefile.hpgcc
    - makefile.hpux
    - makefile.ibmc
    - makefile.intel
    - makefile.knr
    - makefile.linux
    - makefile.mingw
    - makefile.mips
    - makefile.msc
    - makefile.ne12bsd
    - makefile.netbsd
    - makefile.nommx
    - makefile.openbsd
    - makefile.os2
    - makefile.sco
    - makefile.sggcc
    - makefile.sgi
    - makefile.so9
    - makefile.solaris
    - makefile.solaris-x86
    - makefile.std
    - makefile.sunos
    - makefile.tc3
    - makefile.vcawin32
    - makefile.vcwin32
    - makefile.watcom
    - makevms.com
    - pngos2.def
    - pngw32.def
    - pngw32.rc
    - SCOPTIONS.ppc
    - smakefile.ppc
  - test-pngtest.sh
  - TODO
  - Y2KINFO
- zlib-1.2.3
  - adler32.c
  - algorithm.txt
  - amiga
    - Makefile.pup
    - Makefile.sas
  - as400
    - bndsrc
    - compile.clp
    - readme.txt
    - zlib.inc
  - ChangeLog
  - check.log
  - compress.c
  - configure
  - contrib
    - ada
      - buffer_demo.adb
      - mtest.adb
      - read.adb
      - readme.txt
      - test.adb
      - zlib.adb
      - zlib.ads
      - zlib.gpr
      - zlib-streams.adb
      - zlib-streams.ads
      - zlib-thin.adb
      - zlib-thin.ads
    - asm586
      - match.S
      - README.586
    - asm686
      - match.S
      - README.686
    - blast
      - blast.c
      - blast.h
      - Makefile
      - README
      - test.pk
      - test.txt
    - delphi
      - readme.txt
      - ZLib.pas
      - ZLibConst.pas
      - zlibd32.mak
    - dotzlib
      - DotZLib.build
      - DotZLib.chm
      - DotZLib.sln
      - DotZLib
        
        AssemblyInfo.cs
        
        ChecksumImpl.cs
        
        CircularBuffer.cs
        
        CodecBase.cs
        
        Deflater.cs
        
        DotZLib.cs
        
        DotZLib.csproj
        
        GZipStream.cs
        
        Inflater.cs
        
        UnitTests.cs
      - LICENSE_1_0.txt
      - readme.txt
    - infback9
      - infback9.c
      - infback9.h
      - inffix9.h
      - inflate9.h
      - inftree9.c
      - inftree9.h
      - README
    - inflate86
      - inffas86.c
      - inffast.S
    - iostream
      - test.cpp
      - zfstream.cpp
      - zfstream.h
    - iostream2
      - zstream.h
      - zstream_test.cpp
    - iostream3
      - README
      - test.cc
      - TODO
      - zfstream.cc
      - zfstream.h
    - masm686
      - match.asm
    - masmx64
      - bld_ml64.bat
      - gvmat64.asm
      - gvmat64.obj
      - inffas8664.c
      - inffasx64.asm
      - inffasx64.obj
      - readme.txt
    - masmx86
      - bld_ml32.bat
      - gvmat32.asm
      - gvmat32.obj
      - gvmat32c.c
      - inffas32.asm
      - inffas32.obj
      - mkasm.bat
      - readme.txt
    - minizip
      - ChangeLogUnzip
      - crypt.h
      - ioapi.c
      - ioapi.h
      - iowin32.c
      - iowin32.h
      - Makefile
      - miniunz.c
      - minizip.c
      - mztools.c
      - mztools.h
      - unzip.c
      - unzip.h
      - zip.c
      - zip.h
    - pascal
      - example.pas
      - readme.txt
      - zlibd32.mak
      - zlibpas.pas
    - puff
      - Makefile
      - puff.c
      - puff.h
      - README
      - zeros.raw
    - README.contrib
    - testzlib
      - testzlib.c
      - testzlib.txt
    - untgz
      - Makefile
      - Makefile.msc
      - untgz.c
    - vstudio
      - readme.txt
      - vc7
        
        miniunz.vcproj
        
        minizip.vcproj
        
        testzlib.vcproj
        
        zlib.rc
        
        zlibstat.vcproj
        
        zlibvc.def
        
        zlibvc.sln
        
        zlibvc.vcproj
      - vc8
        
        miniunz.vcproj
        
        minizip.vcproj
        
        testzlib.vcproj
        
        testzlibdll.vcproj
        
        zlib.rc
        
        zlibstat.vcproj
        
        zlibvc.def
        
        zlibvc.sln
        
        zlibvc.vcproj
  - crc32.c
  - crc32.h
  - deflate.c
  - deflate.h
  - example.c
  - example-res.rc
  - examples
    - fitblk.c
    - gun.c
    - gzappend.c
    - gzjoin.c
    - gzlog.c
    - gzlog.h
    - README.examples
    - zlib_how.html
    - zpipe.c
    - zran.c
  - example-static-res.rc
  - FAQ
  - gzio.c
  - INDEX
  - infback.c
  - inffast.c
  - inffast.h
  - inffixed.h
  - inflate.c
  - inflate.h
  - inftrees.c
  - inftrees.h
  - make_vms.com
  - Makefile
  - Makefile.in
  - minigzip.c
  - minigzip-res.rc
  - minigzip-static-res.rc
  - msdos
    - Makefile.bor
    - Makefile.dj2
    - Makefile.emx
    - Makefile.msc
    - Makefile.tc
  - old
    - descrip.mms
    - Makefile.riscos
    - os2
      - Makefile.os2
      - zlib.def
    - README
    - visual-basic.txt
    - zlib.html
  - patches
    - foo.gz
    - zlib.ico
    - zlib-1.2.2.diff
    - zlib-1.2.2.diff.log
    - zlib-1.2.3.diff
    - zlib-dllversion.c
    - zlib-ltversion
  - projects
    - VS2012
      - example.dsp
      - LIB Debug
        
        zlib.Build.CppClean.log
        
        zlib.log
      - minigzip.dsp
      - README.txt
      - Win32_LIB_Debug
        
        vc110.idb
      - zlib.dsp
      - zlib.dsw
      - zlib.vcxproj
      - zlib.vcxproj.filters
      - zlib.vcxproj.user
  - qnx
    - package.qpg
  - README
  - trees.c
  - trees.h
  - uncompr.c
  - win32
    - DLL_FAQ.txt
    - Makefile.bor
    - Makefile.emx
    - Makefile.gcc
    - Makefile.msc
    - VisualC.txt
    - zlib.def
    - zlib1.rc
  - zconf.h
  - zconf.in.h
  - zlib.3
  - zlib.h
  - zlib.ico
  - zlib-dll-res.rc
  - zlib-dllversion.c
  - zlib-ltversion
  - zutil.c
  - zutil.h

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The GNU General Public License (GPLv3)

Written By

Grant Curell

United States

Grant is a specialist in computer security and networking. He holds a bachelors degree in Computer Science and Engineering from the Ohio State University. Certs: CCNA, CCNP, CCDA, CCDP, Sec+, and GCIH.

PNG Image Steganography with libpng

License

Comments and Discussions