signature mismatch on zip downloaded from github

When I click the “download zip” button for a package on github, or download a particular commit by https://github.com/{username}/{projectname}/archive/{sha}.zip, the sha1sum of the file ends up on my computer does not agree with the one shown on webpage.

Why is this occurring? It is unsafe for the sha1sum to not match. How do I download a commit’s full source code with verifiable hashsum without using “git” command or having to make an account on github (because I want to just once download the library for local use, not edit it).

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  • One Solution collect form web for “signature mismatch on zip downloaded from github”

    Downloading a repo source content with the following url…


    https://github.com/{username}/{projectname}/archive/{sha}.zip

    …will retrieve the code source contained in the commit with the following url


    https://github.com/{username}/{projectname}/commits/{sha}

    Running sha1sum on the retrieved archive will not produce the sha of the targeted commit.

    The way Git relies on SHA-1 hashes to uniquely identify its internal objects is explained in detail in this chapter of the Pro Git book. You’ll notice that the sha of any commit will depend on the sha of its parent commit (and indirectly of all its ancestors). This means that in order to produce such a sha, you would need the whole history of all the changes that lead to this commit.

    In order to securely verify that the source code hasn’t been altered and matches the commit sha displayed on GitHub, there’s no other way than cloning the full repository and running the following command. This command will update your working directory with the content of the commit.


    git checkout {sha}

    If git cannot find a commit that matches this sha, the command will fail.

    Git Baby is a git and github fan, let's start git clone.