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doc: update README with SHASUMS256.txt.sig info #15107

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23 changes: 15 additions & 8 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -134,12 +134,12 @@ $ grep node-vx.y.z.tar.gz SHASUMS256.txt | sha256sum -c -
_(Where "node-vx.y.z.tar.gz" is the name of the file you have
downloaded)_

Additionally, Current and LTS releases (not Nightlies) have GPG signed
copies of SHASUMS256.txt files available as SHASUMS256.txt.asc. You can use
`gpg` to verify that the file has not been tampered with.
Additionally, Current and LTS releases (not Nightlies) have the GPG
detached signature of SHASUMS256.txt available as SHASUMS256.txt.sig.
You can use `gpg` to verify that SHASUMS256.txt has not been tampered with.

To verify a SHASUMS256.txt.asc, you will first need to import all of
the GPG keys of individuals authorized to create releases. They are
To verify SHASUMS256.txt has not been altered, you will first need to import
all of the GPG keys of individuals authorized to create releases. They are
listed at the bottom of this README under [Release Team](#release-team).
Use a command such as this to import the keys:

Expand All @@ -150,10 +150,17 @@ $ gpg --keyserver pool.sks-keyservers.net --recv-keys DD8F2338BAE7501E3DD5AC78C2
_(See the bottom of this README for a full script to import active
release keys)_

You can then use `gpg --verify SHASUMS256.txt.asc` to verify that the
file has been signed by an authorized member of the Node.js team.
Next, download the SHASUMS256.txt.sig for the release:

Once verified, use the SHASUMS256.txt.asc file to get the checksum for
```console
$ curl -O https://nodejs.org/dist/vx.y.z/SHASUMS256.txt.sig
```

After downloading the appropriate SHASUMS256.txt and SHASUMS256.txt.sig files,
you can then use `gpg --verify SHASUMS256.txt.sig SHASUMS256.txt` to verify
that the file has been signed by an authorized member of the Node.js team.

Once verified, use the SHASUMS256.txt file to get the checksum for
the binary verification command above.

## Building Node.js
Expand Down