Self-hosted, federated location sharing app and server that prioritizes user privacy and security
end-to-end-encryption
location-sharing
privacy
self-hosted
federated
added nonce to auth
+23
-7
+12
-4
app/src/utils/api.ts
+12
-4
app/src/utils/api.ts
···
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76
"sign",
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]);
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-
const signature = await crypto.subtle.sign("Ed25519", privKey, bodyBytes);
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-
const signature_b64 = bufToBase64(signature);
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+
const nonce = new Uint8Array(8);
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+
crypto.getRandomValues(nonce);
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+
const data_to_sign = new Uint8Array(bodyBytes.length + nonce.length);
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+
data_to_sign.set(bodyBytes);
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+
data_to_sign.set(nonce, bodyBytes.length);
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+
const signature = await crypto.subtle.sign("Ed25519", privKey, data_to_sign);
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const headers = {
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-
"x-auth": JSON.stringify({ user_id, signature: signature_b64 }),
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+
"x-auth": JSON.stringify({
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+
user_id,
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+
signature: bufToBase64(signature),
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+
nonce: nonce.toBase64(),
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+
}),
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"Content-Type": "application/json", // TODO: not always json tho, but does it matter?
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};
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const res = await fetch(`${server_url}/${endpoint}`, {
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method: "POST",
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headers,
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-
body: bodyBytes, // TODO: do we need to send bodyBytes instead to match server side auth?
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+
body: bodyBytes,
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});
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if (!res.ok) throw new Error(`HTTP ${res.status}: ${await res.text()}`);
+10
-3
server/src/auth.rs
+10
-3
server/src/auth.rs
···
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//////////////////////////////////// unsure
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////////////////////////////////////
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-
let sig_vec = BASE64_STANDARD
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+
let sign_vec = BASE64_STANDARD
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.decode(&auth_data.signature)
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.map_err(|e| SrvErr!("base64 decode fail", e))?;
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+
let nonce_vec = BASE64_STANDARD
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+
.decode(&auth_data.nonce)
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+
.map_err(|e| SrvErr!("base64 decode fail", e))?;
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65
let sig_bytes: [u8; 64] =
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-
sig_vec.try_into().map_err(|e| SrvErr!("invalid signature length", e))?;
66
+
sign_vec.try_into().map_err(|e| SrvErr!("invalid signature length", e))?;
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let signature = Signature::from_bytes(&sig_bytes);
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-
if let Err(err) = verifying_key.verify_strict(&body_bytes, &signature) {
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+
let mut combined_vec = Vec::with_capacity(body_bytes.len() + nonce_vec.len());
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+
combined_vec.extend_from_slice(&body_bytes);
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+
combined_vec.extend_from_slice(&nonce_vec);
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+
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+
if let Err(err) = verifying_key.verify_strict(&combined_vec, &signature) {
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panic!("Signature verification failed: {err}");
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}
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