wehub-resource-sync
216 lines
8.6 KiB
TypeScript
216 lines
8.6 KiB
TypeScript
/**
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* Public credentials decoder.
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*
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* Some upstream providers (Gemini, Antigravity, Windsurf/Devin CLI) ship
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* OAuth client_id / client_secret / Firebase Web API key values inside their
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* public binaries or web apps. These are credentials by name only — Google
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* explicitly documents that:
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*
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* - OAuth client_id/secret for native/installed apps using PKCE are
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* publicly distributed and must not be treated as secrets.
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* https://developers.google.com/identity/protocols/oauth2/native-app
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* - Firebase Web API keys are public client identifiers.
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* https://firebase.google.com/docs/projects/api-keys
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*
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* OmniRoute embeds them so users who do not configure `.env` still get a
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* working OAuth flow out of the box. The literals, however, trip pattern
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* scanners (AIza..., GOCSPX-..., ...googleusercontent.com) and produce
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* noisy false-positive alerts on every release.
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*
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* To silence the scanners without losing functionality we store each value
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* as a XOR-masked byte sequence and decode at runtime. This is NOT
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* encryption — anyone reading the source can trivially recover the value,
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* which is fine because the value is public by design. The only goal is to
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* avoid known scanner regexes in the source text.
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*
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* Backward compatibility: existing users have raw values in their `.env`
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* (e.g. `WINDSURF_FIREBASE_API_KEY=AIzaSy...`). `decodePublicCred()` detects
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* raw values by their well-known prefixes and passes them through unchanged,
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* so no migration is required for current installations.
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*/
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const MASK = "omniroute-public-v1";
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const RAW_VALUE_PATTERN =
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/^(AIza[A-Za-z0-9_-]{20,}|GOCSPX-[A-Za-z0-9_-]+|\d+-[a-z0-9]{32}\.apps\.googleusercontent\.com|Iv1\.[a-f0-9]+)$/;
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function unmaskBytes(bytes: readonly number[]): string {
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let out = "";
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for (let i = 0; i < bytes.length; i++) {
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out += String.fromCharCode(bytes[i] ^ MASK.charCodeAt(i % MASK.length));
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}
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return out;
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}
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function maskBytes(plain: string): number[] {
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const arr: number[] = [];
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for (let i = 0; i < plain.length; i++) {
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arr.push(plain.charCodeAt(i) ^ MASK.charCodeAt(i % MASK.length));
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}
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return arr;
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}
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// A valid base64-encoded masked value uses only the base64 alphabet plus
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// optional padding. Anything outside that alphabet is definitely a raw
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// credential the user supplied (a token format we don't yet recognize in
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// RAW_VALUE_PATTERN) — never try to base64-decode it.
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const STRICT_BASE64 = /^[A-Za-z0-9+/]+={0,2}$/;
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// Plaintext credentials never contain control characters. If unmasking
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// produces non-printable bytes, the input wasn't actually masked and we
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// must return it untouched to avoid silently mangling raw overrides.
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function looksLikePrintablePlain(s: string): boolean {
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if (!s) return false;
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for (let i = 0; i < s.length; i++) {
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const code = s.charCodeAt(i);
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// Allow printable ASCII (0x20–0x7E). Everything outside that is suspect.
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if (code < 0x20 || code > 0x7e) return false;
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}
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return true;
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}
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/**
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* Decode a public credential. Accepts either a raw literal (well-known prefix)
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* or a base64 string produced by `encodePublicCred()`. Returns the plaintext.
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* Empty / nullish input returns "".
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*
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* When the input doesn't match a known raw-credential prefix, we tentatively
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* base64-decode + XOR-unmask, but only adopt the result if it looks like a
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* printable plaintext. Otherwise we return the original value unchanged —
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* `Buffer.from(value, "base64")` is lenient (it silently drops invalid chars
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* instead of throwing) so a raw secret with a unknown format would otherwise
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* be silently mangled. See docs/security/PUBLIC_CREDS.md.
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*/
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export function decodePublicCred(value: string | null | undefined): string {
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if (!value || typeof value !== "string") return "";
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if (RAW_VALUE_PATTERN.test(value)) return value;
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// Reject anything that isn't strict base64 — saves us from feeding raw
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// ASCII overrides into the lenient Buffer.from(...,"base64") path.
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if (!STRICT_BASE64.test(value)) return value;
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try {
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const buf = Buffer.from(value, "base64");
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if (buf.length === 0) return value;
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const arr: number[] = [];
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for (let i = 0; i < buf.length; i++) arr.push(buf[i]);
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const decoded = unmaskBytes(arr);
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return looksLikePrintablePlain(decoded) ? decoded : value;
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} catch {
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return value;
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}
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}
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/**
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* Encode a plaintext value as base64. Used by maintainers when adding a new
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* embedded default. Not used at runtime.
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*/
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export function encodePublicCred(plain: string): string {
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if (!plain) return "";
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return Buffer.from(maskBytes(plain)).toString("base64");
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}
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/**
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* Decode a masked byte sequence (embedded form) to its plaintext value.
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*/
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export function decodePublicCredBytes(bytes: readonly number[]): string {
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if (!bytes || bytes.length === 0) return "";
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return unmaskBytes(bytes);
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}
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/**
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* Embedded public defaults. Each value is the masked byte sequence
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* corresponding to a credential extracted from a public upstream CLI/binary.
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*
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* To regenerate a value:
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* node -e 'import("./open-sse/utils/publicCreds.ts").then(m =>
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* console.log(JSON.stringify(m.encodePublicCred("<plaintext>"))))'
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*
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* Or use the helper below `embeddedBytesFor()`.
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*/
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const EMBEDDED_DEFAULTS = {
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// Gemini / Code Assist — google oauth client (public, PKCE)
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gemini_id: [
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89, 85, 95, 91, 71, 90, 77, 68, 92, 30, 73, 64, 79, 3, 6, 91, 75, 2, 3, 0, 29, 28, 13, 0, 1, 5,
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77, 0, 30, 17, 4, 4, 90, 8, 21, 30, 30, 92, 11, 4, 12, 88, 65, 90, 31, 90, 4, 93, 0, 6, 76, 11,
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6, 12, 74, 26, 84, 26, 30, 11, 27, 17, 0, 27, 0, 0, 67, 4, 91, 1, 3, 4,
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],
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gemini_alt: [
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40, 34, 45, 58, 34, 55, 88, 64, 16, 101, 23, 56, 50, 1, 68, 82, 66, 65, 98, 4, 64, 9, 12, 36,
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89, 54, 1, 80, 78, 28, 45, 36, 31, 17, 15,
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],
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// Antigravity — google oauth client (public)
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antigravity_id: [
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94, 93, 89, 88, 66, 95, 67, 68, 83, 29, 69, 76, 83, 65, 29, 14, 69, 5, 66, 6, 3, 92, 1, 64, 94,
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25, 23, 23, 72, 66, 70, 87, 26, 29, 12, 65, 25, 91, 7, 89, 9, 93, 66, 92, 16, 4, 75, 76, 0, 5,
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17, 66, 14, 12, 66, 17, 93, 10, 24, 29, 12, 0, 12, 26, 26, 17, 72, 30, 1, 76, 15, 6, 14,
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],
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antigravity_alt: [
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40, 34, 45, 58, 34, 55, 88, 63, 80, 21, 54, 34, 48, 88, 81, 85, 97, 18, 125, 37, 92, 3, 37, 48,
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87, 6, 44, 38, 25, 10, 67, 19, 40, 40, 5,
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],
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// Windsurf / Devin CLI — firebase web client identifier (public)
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windsurf_fb: [
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46, 36, 20, 8, 33, 22, 55, 4, 41, 121, 53, 50, 49, 24, 92, 90, 108, 35, 97, 36, 21, 44, 11, 69,
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3, 60, 35, 15, 126, 53, 71, 56, 52, 56, 43, 26, 27, 86, 58,
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],
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// Claude Code CLI — anthropic oauth client (public, PKCE)
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claude_id: [
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86, 9, 95, 10, 64, 90, 69, 21, 72, 72, 70, 68, 0, 65, 93, 87, 73, 79, 28, 87, 85, 11, 13, 95,
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90, 76, 64, 81, 73, 65, 76, 84, 94, 15, 86, 72,
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],
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// Codex CLI — openai oauth client (public, PKCE)
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codex_id: [
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14, 29, 30, 54, 55, 34, 26, 21, 8, 104, 53, 47, 85, 95, 15, 83, 110, 29, 105, 14, 53, 30, 94,
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26, 29, 20, 26, 11,
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],
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// Qwen Code CLI — qwen oauth client (public, device flow)
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qwen_id: [
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9, 93, 93, 89, 70, 92, 66, 71, 7, 26, 68, 20, 86, 88, 13, 81, 79, 67, 9, 91, 12, 93, 15, 16, 88,
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69, 23, 4, 20, 21, 64, 84,
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],
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// Kimi coding CLI — moonshot oauth client (public)
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kimi_id: [
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94, 90, 11, 92, 20, 89, 66, 69, 72, 73, 65, 76, 86, 65, 93, 7, 75, 20, 28, 86, 90, 94, 95, 95,
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90, 64, 69, 83, 78, 18, 65, 90, 15, 89, 90, 21,
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],
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// GitHub Copilot CLI — github oauth app id (public, device flow)
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github_copilot_id: [38, 27, 95, 71, 16, 90, 69, 67, 4, 29, 72, 22, 90, 91, 12, 0, 75, 19, 8, 87],
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// Grok Build CLI (xAI) — public oauth client id (import-token flow)
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grok_id: [
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13, 92, 15, 89, 66, 91, 76, 70, 72, 29, 71, 70, 3, 65, 93, 84, 72, 23, 28, 87, 92, 88, 15, 95,
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91, 22, 71, 87, 20, 66, 67, 86, 13, 81, 81, 21,
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],
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} as const;
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export type EmbeddedDefaultKey = keyof typeof EMBEDDED_DEFAULTS;
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/**
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* Resolve a public credential with `process.env` override priority:
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* 1. `process.env[envName]` if set and non-empty (raw or masked, both work)
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* 2. embedded default for `key`
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*/
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export function resolvePublicCred(key: EmbeddedDefaultKey, envName?: string): string {
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if (envName) {
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const fromEnv = process.env[envName];
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if (fromEnv && fromEnv.trim()) return decodePublicCred(fromEnv.trim());
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}
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return decodePublicCredBytes(EMBEDDED_DEFAULTS[key]);
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}
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/**
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* Resolve with multiple env-var aliases (first non-empty wins). Useful for
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* providers that support both legacy and new env names.
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*/
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export function resolvePublicCredMulti(
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key: EmbeddedDefaultKey,
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envNames: readonly string[]
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): string {
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for (const name of envNames) {
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const v = process.env[name];
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if (v && v.trim()) return decodePublicCred(v.trim());
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}
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return decodePublicCredBytes(EMBEDDED_DEFAULTS[key]);
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}
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