Composer [UnexpectedValueException] error will trying to use composer to install a github project

I started getting a similar error and the reason was that Github recently changed the format of their auth tokens:

https://github.blog/changelog/2021-03-31-authentication-token-format-updates-are-generally-available/

To resolve the error:

Find the composer/auth.json file (if you're running the project in a container, you'll have to bash into it and find the file in there) Remove its github.com entry. Your file will probably look like the following after removing the entry: {"github-oauth": {}} Run composer self-update. The issue got resolved in version 2.0.12. See the first item in the changelog for that version here: https://getcomposer.org/changelog/2.0.12

After that, you can restore your composer/auth.json file to its initial state as the newer version of composer will recognize the new key format.

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You can try Basic Auth instead:

Change this (oauth):

  "github-oauth": {
    "github.com": "ghp_[YOUR-PERSONAL-TOKEN]"
  }

To this (basic auth):

  "http-basic": {
    "github.com": {
      "username": "[YOUR-GITHUB-USERNAME]",
      "password": "ghp_[YOUR-PERSONAL-TOKEN]"
    }
  }

You can find instructions on how to create a Personal Access Token

Inspired from github docs. Apparently, you can use Basic Authentication with a Personal Access token instead of oauth in some cases (e.g. like mine: installing a private git repo with composer).

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I fixed it.

Goto C:\Users\XXXXX\AppData\Roaming\Composer

Open the auth.json

delete the github.com entry under "github-oauth": {}

That's it.

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Update answer for Masiorama and Ruchir Mehta: If you looking for file auth.json but don't know how, use this command:

locate auth.json

And here's the result: You can see that auth.json will look like this:

/home/{your user name}/.config/composer/auth.json

https://i.stack.imgur.com/mvnfA.png

Then you could use this command to edit the file:

sudo gedit /home/dev/.config/composer/auth.json

https://i.stack.imgur.com/WTcZ8.png

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If you're on MacOS, the auth.json file is at ~/.composer/auth.json. Then from there, you can remove the value for github-oauth. I tried fully deleting the file but I got a parse error, Expected one of: 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '['. Your auth.json file should look like this:

{
        "github-oauth": {}
}

This is similar to other answers posted but I wasn't able to use the locate command on MacOS so this might be helpful to other Mac users

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This error recently popped up from nowhere.

Simply deleting the whole auth file worked for me..! Not sure why / when it appeared in the first place.

~/.composer/auth.json

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As far as I know (I'm a beginner with composer too), the problem is with your authentication, so you have to fix your credentials in auth.json inside path-to-composer/.composer/

Inside you will find a json which will probably looks like:

{
  "github-oauth": {
    "github.com": null
  }
}

Fix that and you should be ok ;)

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The solution is just to upgrade your Composer version using command composer self-update.

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Same solution as the answer of Paulina Khew but with command lines on MacOS :

cd ~/.composer/
nano auth.json

Delete what is inside th bracket :

{
        "github-oauth": {}
}

When you're ready to save the file, hold down the Ctrl key and press the letter O

Press the Enter key on your keyboard to save.

When finished, press Ctrl + X to close nano and return to your shell.

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Go to C:\Users\UserName\AppData\Roaming\Composer Open the auth.json file. Clear everything and paste the below code

{
"bitbucket-oauth": {},
"github-oauth": {},
"gitlab-oauth": {},
"gitlab-token": {},
"http-basic": {},
"bearer": {}
}

I hope it will be solved

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I run in the same problem after upgrading githup api token to the new format. The answer is you need to upgrade composer version 1.10.21 or higher that fixes this problem.

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Edit the composer authentication configuration file ~/.composer/auth.json

Then replace the following.

"http-basic": {
  "github.com": {
    "username": "[YOUR-GITHUB-USERNAME]",
    "password": "ghp_[YOUR-PERSONAL-TOKEN]"
  }
}

Now run the command composer install

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That's a bug.

If you have Debian or Ubuntu, try this patch. Otherwise read the last line.

Quick copy-paste patch

If you have Debian 10 buster or Ubuntu 20.LTS or similar distributions, try this copy-paste command:

wget https://gist.githubusercontent.com/valerio-bozzolan/84364c28a3bba13751c504214016adcf/raw/c1356d529c89c10de4c959058e2e86ffe58fa407/fix-composer.patch -O /tmp/fix-composer.patch
sudo patch /usr/share/php/Composer/IO/BaseIO.php /tmp/fix-composer.patch

If it does not work, write it in the comments.

Step-by-step explaination

Your Composer version has a bug: you are able to save a valid GitHub token, but then it's not able to read that token again because Composer thinks that your GitHub token cannot contain underscores or stuff like that. Moreover, it's strange that Composer checks its syntax only the second time. Why? that's another story.

The fix is simple. You can temporary disable that wrong validation in your Composer version. Also because GitHub is a proprietary service and their specifications can change over time (as you demonstrated today). So it makes sense not to validate the syntax of GitHub tokens. The only person who should hard-validate GitHub tokens is GitHub itself, not Composer.

If you installed Composer via apt install composer, probably you will not have any update available and surely you cannot use self-update because Composer is read-only for security reasons (and for a similar reason, you should not execute Composer from root). Instead, you can create a safe hot-patch to fix that specific issue.

To create a patch, create a file called /tmp/fix-composer.patch with this exact content:

103,105c103,105
<             if (!preg_match('{^[.a-z0-9]+$}', $token)) {
<                 throw new \UnexpectedValueException('Your github oauth token for '.$domain.' contains invalid characters: "'.$token.'"');
<             }
---
> //            if (!preg_match('{^[.a-z0-9]+$}', $token)) {
> //                throw new \UnexpectedValueException('Your github oauth token for '.$domain.' contains invalid characters: "'.$token.'"');
> //   

That content can also be seen from here:

https://gist.github.com/valerio-bozzolan/84364c28a3bba13751c504214016adcf

Then run this command to apply that patch:

sudo patch /usr/share/php/Composer/IO/BaseIO.php /tmp/fix-composer.patch

If it does not work, probably you have not installed composer via apt.

In short, whatever operating system, and whatever installation method, locate the file BaseIO.php in your Composer and comment out the validation check.

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