Replace validateZcBaseURL(zcBaseURL string) with:
- validateZcHost(host string) (net.IP, error) — validates literal IP
- buildZcBase(ip net.IP, port string) *url.URL — builds URL with literal /zc path
The key change: the URL path is now the string literal "/zc" everywhere,
never derived from user input. CodeQL's go/request-forgery model traces
taint through the Path field of a rebuilt URL; removing that field from
the taint chain closes alerts 134, 135, 136.
Public API changes:
zeroconf.GetInfo(host, port string)
zeroconf.PushCredentials(host, port, username, accessToken string)
spotify.ZeroConfGetInfo(host, port string)
spotify.PushSpotifyCredentials(host, port, username, accessToken string)
amazon.PushAmazonCredentials(host, port, username, accessToken string)
Callers in handlers/server.go already held host+port separately via
net.SplitHostPort; the zcURL construction is removed.
Tests updated throughout; TestValidateZcBaseURL renamed to
TestValidateZcHost and TestBuildZcBase added for the new helpers.
Closes CodeQL alerts 134, 135, 136 (go/request-forgery).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add GetAccountByRefreshToken to amazon.Service — the speaker sends
the bare Atzr| refresh token (extracted from AmazonSecret JSON), not
a surrogate, so lookup must match against Account.RefreshToken
- Add amazonService field, SetAmazonService and IsAmazonConfigured to
Server (step 5 essentials required by the handler)
- Replace HandleBoseAmazonToken 501 stub with full implementation:
lookup by refresh token → RefreshAccessToken; fallback to
GetFreshToken; fallback to HandleBoseProxy if no service configured;
scope intentionally omitted from response
- Add handler tests covering the by-refresh-token path (mock LWA
server), the default-account path, and the no-service fallback
- Unlock assertions in post_oauth_token_amazon.http integration test
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Extract DH key exchange crypto from pkg/service/spotify into new
pkg/service/zeroconf package with exported functions and
AuthTypeOAuthToken constant (both Spotify and Amazon use auth type 4)
- Reduce pkg/service/spotify/zeroconf.go to thin wrappers around the
shared package; public API (PushSpotifyCredentials, ZeroConfGetInfo)
is preserved
- Add pkg/service/amazon package mirroring the Spotify service with
Amazon-specific differences: LWA endpoints, POST body credentials
(not Basic Auth), user_id/name profile fields, amazon/accounts.json
- Add PushAmazonCredentials delegating to shared zeroconf.PushCredentials
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace the simplified tokenType=accesstoken push with the full Spotify
Connect ZeroConf protocol: GET getInfo to fetch the speaker's 768-bit DH
public key, derive AES-128-CTR + HMAC-SHA1 keys from the shared secret,
and POST an encrypted LoginCredentials protobuf blob. Speakers that
receive a proper blob can self-refresh their Spotify session
independently, eliminating the need for periodic re-priming on token
expiry. Falls back to the raw token approach automatically when getInfo
fails, preserving compatibility with older firmware.
SHA1 is mandated by the Spotify Connect ZeroConf protocol spec for DH key derivation. This cannot be changed without breaking protocol compatibility.
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Tobias GesellchenandClaude Sonnet 4.6