docs: clarify Signal message encryption and Windows PATH after install - #979
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📝 WalkthroughWalkthroughThe documentation now explains Signal candidate encryption in more detail. The Windows installation guide explains terminal ChangesSignal encryption explanation
Windows installation commands
Priority: ⬇️ Low Estimated code review effort: 1 (Trivial) | ~5 minutes Change: Other Merge Risk: 🔵 Low · up to The explanation could lead readers to misunderstand which parts of a Signal message are visible. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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- how-netbird-works: the Signal candidate message uses NaCl box (Curve25519, XSalsa20, Poly1305): a shared key derived from the local private key and the remote public key, no separate signature. Spell that out so readers with an RSA sign-then-encrypt model do not read the sentence as a mistake. - windows install: both installers add C:\Program Files\NetBird to the system PATH, but terminals opened before the install keep the old PATH. Add a note to open a new terminal, and use the full exe path in the scripted install + setup-key snippets, where the same shell runs both commands.
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Inline comments:
In `@src/pages/about-netbird/how-netbird-works.mdx`:
- Line 77: Update the explanatory text around the Signal message description to
state that both peers’ public keys remain visible in the outer Signal message,
while only the candidate body is end-to-end encrypted. Preserve the existing
encryption and authentication details.
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Two clarifications prompted by reader feedback on a first Windows install.
How NetBird Works: Signal message encryption
The sentence "This message is encrypted with the peer's private key and a public key of the remote peer" reads like a mistake to anyone with an RSA mental model, where the private key signs and the recipient's public key encrypts. It is actually correct: the Signal body is sealed with NaCl
box(encryption/encryption.go), which derives one shared key from the local private key and the remote public key and uses it for both encryption and authentication. There is no signature step.The sentence now says that explicitly, names the primitives, and states what Signal can and cannot see: the outer message carries both public keys in cleartext (
shared/signal/proto/signalexchange.proto), only the candidate body is encrypted.Windows install:
netbirdnot found after installingBoth installers add
C:\Program Files\NetBirdto the systemPATH(client/installer.nsisvia EnVar,client/netbird.wxsvia the WiX Environment element), but Windows never updates the environment of a process that is already running. A terminal opened before the install fails onnetbird upwith a not-recognized error.netbird upin the same shell, so the second line always inherited the oldPATHand failed. They now callnetbird.exeby full path, with one sentence explaining why.Summary by CodeRabbit