7zip question

Discussion in 'Mac Basics and Help' started by Andy2k, May 12, 2017.

  1. Andy2k, May 12, 2017
    Last edited: May 12, 2017

    Andy2k macrumors member

    Joined:
    Jul 18, 2015
    #1
    hey everyone. Wasn't really sure where to post this but here it goes. I went to download 7zip archive/zip software from their website. Curious, as I always am, ;) I wanted to verify the checksum for the exe. I was looking online and I stumbled upon another link for 7zip with a posted checksum at bitser.org. Here's the kicker I download the 64 bit version but the checksum doesn't match 7-zip.org version but it does the bitser version. The bitser version is 7 kb larger than 7-zip. See photo please. Can I download a legit version of 7 zip and if so where. Can some others maybe check and see what results you get. This kind of stuff makes it hard to trust software distributors/creators. (I wish every developer offered a SHA256 checksum for the downloads. I can wish can't I?)

    Edit: Apparently I'm not smart enough to add a picture on here :( It's too large from my phone and from the website I can only add it from a URL.

    Checksums: 7z1604-x64(1).exe
    SHA-256: eaf4de476bffd1dad628ac0862dd605c69e10f069a7f606a28913032d852de35 (From Bitser)

    Checksums: 7z1604-x64.exe
    SHA-256: 9bb4dc4fab2a2a45c15723c259dc2f7313c89a5ac55ab7c3f76bba26edc8bcaa (From 7-zip.org)
     
  2. IHelpId10t5 macrumors 6502

    Joined:
    Nov 28, 2014
    #2
    If you need 7-zip for Windows then there is only ONE place to download it. You should only EVER download software from the SOURCE website (i.e. http://7-zip.org/). Downloading software from ANY "download" site WILL result in repackaged software with crapware installers added (at best) and a trojan (at worst).

    Good for you for checking the hash but someone that checks the hash should also know to never download from a source other than the developer's website.

    Lastly, do you really need 7-zip in 2017? Windows and Mac have had basic zipping/unzipping in the GUI for years and macOS has command line tools to do nearly any compression or archival format that you may need.
     
  3. Huntn macrumors G5

    Huntn

    Joined:
    May 5, 2008
    Location:
    The Misty Mountains
    #3
    I've seen stuff on Windows that seems to require 7zip, no? I agree about only getting it from the official site unless you want a surprise or two. ;)
     
  4. AppleSmack macrumors regular

    Joined:
    Jun 30, 2010
  5. Andy2k thread starter macrumors member

    Joined:
    Jul 18, 2015
    #5
    However without a checksum you won't know either way. Remember handbrake just recently had one of their download mirrors compromised and you could have downloaded handbrake from the "developer" and still have a piece of corrupted software. The only way to be sure is to provide a SHA256 checksum or something similar. Any developer could find the checksum and post it on the website within minutes. Why not use the tools at our disposal?
     
  6. Huntn macrumors G5

    Huntn

    Joined:
    May 5, 2008
    Location:
    The Misty Mountains
    #6
    I agree but did not realize that Windows 10 had the ability to work with 7zip files natively.
     
  7. Andy2k thread starter macrumors member

    Joined:
    Jul 18, 2015
    #7
    Yes it's one of the slick new built-in features of Windows 10. All the more reason to use it IMHO. Couldn't get much easier than right-clicking the file and selecting "CRC" from the menu.
     

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