[Fix] Fully support Authorization headers using the Basic authenticat…

[amejia1]

…ion scheme.

Usage of the Basic authentication scheme involves setting the NVM_AUTH_HEADER environment variable to the value "Basic <base64 encoded value of string 'username:password'>"

Here's an example shell one-liner to set this environment variable.

export NVM_AUTH_HEADER="Basic $(echo 'username:password' | base64)"

The above literal username and password values would work since the base64 encoded value would be 'dXNlcm5hbWU6cGFzc3dvcmQK'. However, a username and password combination such as 'test:123?12>' would not work since the base64 encoded value would be 'dGVzdDoxMjM/MTI+Cg=='. The nvm_sanitize_auth_header function before this change would have stripped the valid base64 characters '/', '+', and '='.

[ljharb]

Thanks! We'll need regression tests, though

[amejia1]

Alright, I added a test.

[ljharb]

Thanks! However, using docker images in CI is a bit of a heavy lift; can you find a way to run the tests without using docker?

(also, test files need to chmod a+x to run)

[amejia1]

Thanks! However, using docker images in CI is a bit of a heavy lift; can you find a way to run the tests without using docker?

(also, test files need to chmod a+x to run)

I saw that the kennethreitz/httpbin container image was already being used for one of the existing tests and just used it to derive a second test to verify the changes in this PR. There is the one test using ferronserver/ferron:2 and I could remove it but that image is a distroless image meaning it's basically just the ferron binary plus related ferron programs.

Or maybe I should ask, what makes using docker images in CI a heavy lift? Is it because it needs root access on the host and/or a daemon to run? If that's the case, perhaps podman can be used instead. Podman can be configured for a system account to run rootless containers without a daemon. Most podman commands can replace usage of docker by simply running podman instead of docker.

I'll fix the test files to have the right chmod permissions.