fix(ai): bind sealed secrets to purpose and row; never drop unreadable secrets

Review fix round 1.
- Secret box v2 tokens: one HKDF key per purpose (byok, server-api-key,
  mcp) and AES-GCM AAD bound to the row (user id + provider; server id +
  field). MCP env and headers are sealed per field. open() refuses v1
  tokens; the data upgrade re-seals v1 keys, v1 plaintext MCP values and
  the draft secretCipher, and marks ai_secrets_v2 only when nothing
  legacy is left (retried until the previous secret is back).
- Unreadable secrets are reported (admin: unreadableSecrets with server
  and field; user: byok.keyUnreadable), logged at startup, and kept on
  save unless replaced or cleared (clearApiKey, clearSecrets). The admin
  and account pages show the warnings.
- allowedOrigins and provider resolution no longer open MCP secrets.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
This commit is contained in:
Lucas Winther
2026-10-30 20:49:04 +01:00
co-authored by Claude Opus 5.5
parent 260f7b52c8
commit f2169a1235
14 changed files with 612 additions and 127 deletions
+65 -24
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@@ -1,41 +1,82 @@
/**
* Secret box for API keys at rest: AES-GCM-256 with a key derived by HKDF-SHA-256 from STC_SECRET.
* Token format: `v1.<base64 iv>.<base64 ciphertext+tag>`.
* Secret box for secrets at rest (API keys, MCP env and headers): AES-GCM-256 with keys derived by HKDF-SHA-256
* from STC_SECRET.
*
* - `v2.<base64 iv>.<base64 ciphertext+tag>` (v1.1): each purpose has its own HKDF key (`info` =
* `stcourses/<purpose>/v2`), and the AES-GCM additional data binds the token to the row it belongs to (for
* example the user id and provider of a BYOK key, or the MCP server id and field). A token copied to another
* row or purpose does not open, so the server cannot be used to decrypt one secret as another.
* - `v1.<iv>.<ct>` (v1): one key for everything (info `aes-gcm-256/v1`), no additional data. Only the v1.1 data
* upgrade opens these, to re-seal them as v2 (`openLegacy`); `open` refuses them.
*/
export type SecretPurpose = "byok" | "server-api-key" | "mcp";
export interface SecretBox {
encrypt(plain: string): Promise<string>;
decrypt(token: string): Promise<string>;
seal(plain: string, purpose: SecretPurpose, aad: string): Promise<string>;
open(token: string, purpose: SecretPurpose, aad: string): Promise<string>;
/** v1 tokens only; for the data upgrade. */
openLegacy(token: string): Promise<string>;
}
const enc = new TextEncoder();
const dec = new TextDecoder();
const b64 = (u: Uint8Array) => Buffer.from(u).toString("base64");
const unb64 = (s: string) => new Uint8Array(Buffer.from(s, "base64"));
const unb64 = (s: string): Uint8Array<ArrayBuffer> => new Uint8Array(Buffer.from(s, "base64"));
const SALT = enc.encode("stcourses/byok");
export const isLegacyToken = (token: string): boolean => token.startsWith("v1.");
function deriveKey(secret: string, info: string): Promise<CryptoKey> {
return (async () => {
const ikm = await crypto.subtle.importKey("raw", enc.encode(secret), "HKDF", false, ["deriveKey"]);
return crypto.subtle.deriveKey({ name: "HKDF", hash: "SHA-256", salt: SALT, info: enc.encode(info) }, ikm, { name: "AES-GCM", length: 256 }, false, ["encrypt", "decrypt"]);
})();
}
function parseToken(token: string, version: "v1" | "v2"): { iv: Uint8Array<ArrayBuffer>; ct: Uint8Array<ArrayBuffer> } {
const [v, iv, ct, extra] = token.split(".");
if (v !== version || !iv || !ct || extra !== undefined) throw new Error("Unrecognised secret format");
return { iv: unb64(iv), ct: unb64(ct) };
}
/** Additional data: purpose and row identity, length-prefixed so no two (purpose, aad) pairs encode alike. */
const additionalData = (purpose: SecretPurpose, aad: string) => enc.encode(`stc/${purpose.length}:${purpose}/${aad.length}:${aad}`);
export function createSecretBox(secret: string): SecretBox {
let keyP: Promise<CryptoKey> | null = null;
const key = () =>
(keyP ??= (async () => {
const ikm = await crypto.subtle.importKey("raw", enc.encode(secret), "HKDF", false, ["deriveKey"]);
return crypto.subtle.deriveKey(
{ name: "HKDF", hash: "SHA-256", salt: enc.encode("stcourses/byok"), info: enc.encode("aes-gcm-256/v1") },
ikm,
{ name: "AES-GCM", length: 256 },
false,
["encrypt", "decrypt"],
);
})());
const keys = new Map<string, Promise<CryptoKey>>();
const key = (info: string) => {
let k = keys.get(info);
if (!k) keys.set(info, (k = deriveKey(secret, info)));
return k;
};
return {
async encrypt(plain) {
async seal(plain, purpose, aad) {
const iv = crypto.getRandomValues(new Uint8Array(12));
const ct = new Uint8Array(await crypto.subtle.encrypt({ name: "AES-GCM", iv }, await key(), enc.encode(plain)));
return `v1.${b64(iv)}.${b64(ct)}`;
const ct = new Uint8Array(await crypto.subtle.encrypt({ name: "AES-GCM", iv, additionalData: additionalData(purpose, aad) }, await key(`stcourses/${purpose}/v2`), enc.encode(plain)));
return `v2.${b64(iv)}.${b64(ct)}`;
},
async decrypt(token) {
const [v, iv, ct] = token.split(".");
if (v !== "v1" || !iv || !ct) throw new Error("Unrecognised secret format");
const plain = await crypto.subtle.decrypt({ name: "AES-GCM", iv: unb64(iv) }, await key(), unb64(ct));
async open(token, purpose, aad) {
const { iv, ct } = parseToken(token, "v2");
const plain = await crypto.subtle.decrypt({ name: "AES-GCM", iv, additionalData: additionalData(purpose, aad) }, await key(`stcourses/${purpose}/v2`), ct);
return dec.decode(plain);
},
async openLegacy(token) {
const { iv, ct } = parseToken(token, "v1");
return dec.decode(await crypto.subtle.decrypt({ name: "AES-GCM", iv }, await key("aes-gcm-256/v1"), ct));
},
};
}
/** The v1 token format, exactly as v1 wrote it. Only upgrade tests use it, to build v1 data. */
export async function legacyV1Encrypt(secret: string, plain: string): Promise<string> {
const iv = crypto.getRandomValues(new Uint8Array(12));
const ct = new Uint8Array(await crypto.subtle.encrypt({ name: "AES-GCM", iv }, await deriveKey(secret, "aes-gcm-256/v1"), enc.encode(plain)));
return `v1.${b64(iv)}.${b64(ct)}`;
}
/** AAD for a user's own key: user id and provider kind (the user_api_keys row). */
export const byokAad = (userId: string, provider: string) => `${userId}\n${provider}`;
/** AAD for the admin's provider key (one per server). */
export const SERVER_KEY_AAD = "server";
/** AAD for an MCP server's env or headers: server id and field. */
export const mcpAad = (serverId: string, field: "env" | "headers") => `${serverId}\n${field}`;
+20 -10
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@@ -91,6 +91,10 @@ function parseMcp(v: unknown): McpServerConfig[] | "invalid" {
if (s.headers && typeof s.headers === "object") cfg.headers = Object.fromEntries(Object.entries(s.headers).map(([k, val]) => [k, String(val)]));
}
if (Array.isArray(s.courseIds)) cfg.courseIds = s.courseIds.map(String).filter(Boolean);
if (s.clearSecrets !== undefined) {
if (!Array.isArray(s.clearSecrets) || !s.clearSecrets.every((f) => f === "env" || f === "headers")) return "invalid";
if (s.clearSecrets.length) cfg.clearSecrets = [...new Set(s.clearSecrets as ("env" | "headers")[])];
}
out.push(cfg);
}
return out;
@@ -147,10 +151,16 @@ export function aiFeature(ctx: ServerContext, opts: AiFeatureOptions = {}): Feat
const sink = opts.draftSink ?? createFsDraftSink(ctx.config.dataDir);
const log = opts.log ?? ((m: string) => console.error(`[ai] ${m}`));
// The v1 data upgrade (mentor toggles, MCP secrets) starts now; every settings call also waits for it.
settings.ready().catch((e) => log(`v1.1 data upgrade failed (retried on next use): ${(e as Error).message}`));
// Unreadable secrets are kept, never dropped; say so once at startup (the admin page shows the details).
settings.ready()
.then(() => settings.getServer())
.then((s) => {
if (s.unreadableSecrets.length) log(`${s.unreadableSecrets.length} stored AI secret(s) cannot be decrypted with the current STC_SECRET; they are kept until re-entered or the previous secret is restored`);
})
.catch((e) => log(`v1.1 data upgrade failed (retried on next use): ${(e as Error).message}`));
// AppConfig.aiAllowedBaseUrls (STC_AI_ALLOWED_BASE_URLS) plus the admin's list in the server AI settings.
const configOrigins = parseAllowedOrigins((ctx.config.aiAllowedBaseUrls ?? []).join(","));
const allowedOrigins = async () => [...new Set([...configOrigins, ...(await settings.getServer()).allowedBaseUrls])];
const allowedOrigins = async () => [...new Set([...configOrigins, ...(await settings.allowedBaseUrls())])];
/**
* Providers for a user's own key never follow redirects, and their errors reach the user only as the HTTP
* status plus a fixed sentence (the full text is logged here). Server-scope providers are the admin's own.
@@ -172,12 +182,12 @@ export function aiFeature(ctx: ServerContext, opts: AiFeatureOptions = {}): Feat
if (key && base) return { source: "byok", cfg: { ...u.byok, baseUrl: base }, key };
}
}
const s = await settings.getServer();
if (!s.provider) return null;
if (s.provider.kind === "anthropic" && !s.provider.hasApiKey) return null;
const key = s.provider.hasApiKey ? await settings.serverApiKey().catch(() => null) : null;
if (s.provider.kind === "anthropic" && !key) return null;
return { source: "server", cfg: s.provider, key };
const provider = await settings.serverProvider();
if (!provider) return null;
if (provider.kind === "anthropic" && !provider.hasApiKey) return null;
const key = provider.hasApiKey ? await settings.serverApiKey().catch(() => null) : null;
if (provider.kind === "anthropic" && !key) return null;
return { source: "server", cfg: provider, key };
};
const viewable = async (user: AuthUser | null, courseId: string): Promise<LoadedCourse | null> => {
@@ -378,8 +388,8 @@ export function aiFeature(ctx: ServerContext, opts: AiFeatureOptions = {}): Feat
GET: async (_req, rc) => {
if (!rc.user) return err(401, "Sign in first.");
const u = await settings.getUser(rc.user.id);
const s = await settings.getServer();
return json({ byok: u.byok, serverProvider: s.provider ? { kind: s.provider.kind, model: s.provider.model ?? null } : null });
const p = await settings.serverProvider();
return json({ byok: u.byok, serverProvider: p ? { kind: p.kind, model: p.model ?? null } : null });
},
},
"/api/ai/account/key": {
+1 -1
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@@ -2,7 +2,7 @@ export { createSecretBox, type SecretBox } from "./crypto";
export { migrationsDirs } from "./migrations";
export * from "./settings";
export { upgradeAiData, AI_DATA_UPGRADE } from "./upgrade";
export { upgradeAiData, AI_DATA_UPGRADE, AI_SECRETS_UPGRADE } from "./upgrade";
export * from "./providers";
export * from "./retrieval/course-index";
export { Bm25, tokenize } from "./retrieval/bm25";
+93 -26
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@@ -1,12 +1,33 @@
import type { SecretBox } from "../crypto";
import { mcpAad, type SecretBox } from "../crypto";
import type { McpServerConfig } from "../settings";
/**
* MCP `env` and `headers` at rest: both move into `secretCipher`, sealed with the same AES-GCM/HKDF box as API
* keys. The admin API only ever sees masked values; server code opens them to start or call an MCP server.
* MCP `env` and `headers` at rest: each field is sealed on its own (`envCipher`, `headersCipher`) with the "mcp"
* purpose key and the server id plus field name as additional data, so a cipher moved to another server, field or
* table does not open. The admin API only ever sees masked values; server code opens them to start or call a server.
*
* Older shapes, re-sealed by the data upgrade (src/upgrade.ts): plaintext `env`/`headers` (v1) and one v1-token
* `secretCipher` holding `{ env, headers }` (the first v1.1 draft).
*/
export type StoredMcpServer = Omit<McpServerConfig, "env" | "headers"> & { secretCipher?: string; env?: Record<string, string>; headers?: Record<string, string> };
type Secrets = { env?: Record<string, string>; headers?: Record<string, string> };
export type SecretField = "env" | "headers";
export const SECRET_FIELDS: SecretField[] = ["env", "headers"];
const CIPHER: Record<SecretField, "envCipher" | "headersCipher"> = { env: "envCipher", headers: "headersCipher" };
export type StoredMcpServer = Omit<McpServerConfig, "env" | "headers" | "clearSecrets"> & {
envCipher?: string;
headersCipher?: string;
/** First v1.1 draft: v1 token of `{ env, headers }`. */
secretCipher?: string;
/** v1: plaintext. */
env?: Record<string, string>;
headers?: Record<string, string>;
};
export interface OpenedMcpServer {
cfg: McpServerConfig;
/** Fields with a stored cipher that cannot be opened (STC_SECRET changed, or a cipher moved from elsewhere). */
unreadable: SecretField[];
}
export const MASK_PREFIX = "••••";
@@ -23,35 +44,81 @@ export class MaskedSecretError extends Error {
}
}
const nonEmpty = (r: Record<string, string> | undefined) => (r && Object.keys(r).length ? r : undefined);
const nonEmpty = (r: Record<string, string> | undefined) =>
(r && typeof r === "object" && !Array.isArray(r) && Object.keys(r).length ? r : undefined);
/** Strips `env`/`headers` from a config and seals them (if any) into `secretCipher`. */
export async function sealMcpServer(box: SecretBox, cfg: McpServerConfig | StoredMcpServer): Promise<StoredMcpServer> {
const { env, headers, secretCipher: _old, ...rest } = cfg as StoredMcpServer;
const secrets: Secrets = {};
if (nonEmpty(env)) secrets.env = env;
if (nonEmpty(headers)) secrets.headers = headers;
return secrets.env || secrets.headers ? { ...rest, secretCipher: await box.encrypt(JSON.stringify(secrets)) } : rest;
const isRecordOfStrings = (v: unknown): v is Record<string, string> =>
!!v && typeof v === "object" && !Array.isArray(v) && Object.values(v).every((x) => typeof x === "string");
/** The non-secret part of a server config (also drops `clearSecrets`, which is a save instruction only). */
function baseOf(s: McpServerConfig | StoredMcpServer): Omit<StoredMcpServer, "envCipher" | "headersCipher" | "secretCipher" | "env" | "headers"> {
const { env: _e, headers: _h, envCipher: _ec, headersCipher: _hc, secretCipher: _sc, clearSecrets: _cs, ...rest } = s as StoredMcpServer & McpServerConfig;
return rest;
}
/** Opens a stored server for server code. Unreadable ciphers are reported, never thrown and never discarded. */
export async function openMcpServer(box: SecretBox, s: StoredMcpServer): Promise<OpenedMcpServer> {
const cfg: McpServerConfig = { ...baseOf(s) };
const unreadable: SecretField[] = [];
for (const f of SECRET_FIELDS) {
const token = s[CIPHER[f]];
if (token) {
try {
const v = JSON.parse(await box.open(token, "mcp", mcpAad(s.id, f)));
if (!isRecordOfStrings(v)) throw new Error("not a record");
if (nonEmpty(v)) cfg[f] = v;
} catch { unreadable.push(f); }
} else if (nonEmpty(s[f])) cfg[f] = s[f]; // v1 plaintext not yet upgraded
}
// A draft-format cipher the upgrade could not open: report the field this transport uses.
if (s.secretCipher) {
const f: SecretField = s.transport === "stdio" ? "env" : "headers";
if (!s[CIPHER[f]] && !unreadable.includes(f)) unreadable.push(f);
}
return { cfg, unreadable };
}
/**
* The full config for server code. A value that cannot be opened (STC_SECRET changed) is dropped with the server
* still listed, so a broken secret never crashes the assistant. Plaintext left over from v1 is passed through.
* Seals a posted (already unmasked) config. For each field: `clearSecrets` drops it; posted values replace it; with
* nothing posted, a stored cipher that could not be opened is kept as it is, so a temporary STC_SECRET mismatch
* never turns into data loss on the next save.
*/
export async function openMcpServer(box: SecretBox, s: StoredMcpServer): Promise<McpServerConfig> {
const { secretCipher, env, headers, ...rest } = s;
let secrets: Secrets = {};
if (secretCipher) {
try { secrets = JSON.parse(await box.decrypt(secretCipher)) as Secrets; } catch { secrets = {}; }
export async function sealMcpServer(box: SecretBox, cfg: McpServerConfig, previous?: { stored: StoredMcpServer; unreadable: SecretField[] }): Promise<StoredMcpServer> {
const out: StoredMcpServer = { ...baseOf(cfg) };
for (const f of SECRET_FIELDS) {
if (cfg.clearSecrets?.includes(f)) continue;
const values = nonEmpty(cfg[f]);
if (values) out[CIPHER[f]] = await box.seal(JSON.stringify(values), "mcp", mcpAad(cfg.id, f));
else if (previous?.unreadable.includes(f)) {
if (previous.stored[CIPHER[f]]) out[CIPHER[f]] = previous.stored[CIPHER[f]];
else if (previous.stored.secretCipher) out.secretCipher = previous.stored.secretCipher;
}
}
const out: McpServerConfig = { ...rest };
const e = nonEmpty(secrets.env) ?? nonEmpty(env);
const h = nonEmpty(secrets.headers) ?? nonEmpty(headers);
if (e) out.env = e;
if (h) out.headers = h;
return out;
}
/** Re-seals v1 plaintext and a readable draft `secretCipher` into per-field v2 ciphers. `pending`: something legacy stays. */
export async function upgradeStoredMcpServer(box: SecretBox, s: StoredMcpServer): Promise<{ server: StoredMcpServer; changed: boolean; pending: boolean }> {
let legacy: { env?: Record<string, string>; headers?: Record<string, string> } = {};
let pending = false;
let changed = false;
if (s.secretCipher) {
try {
const v = JSON.parse(await box.openLegacy(s.secretCipher));
legacy = v && typeof v === "object" ? v : {};
} catch { pending = true; }
}
const out: StoredMcpServer = { ...baseOf(s) };
for (const f of SECRET_FIELDS) {
if (s[CIPHER[f]]) { out[CIPHER[f]] = s[CIPHER[f]]; continue; }
const values = nonEmpty(isRecordOfStrings(s[f]) ? s[f] : undefined) ?? nonEmpty(isRecordOfStrings(legacy[f]) ? legacy[f] : undefined);
if (values) out[CIPHER[f]] = await box.seal(JSON.stringify(values), "mcp", mcpAad(s.id, f));
}
if (pending) out.secretCipher = s.secretCipher;
if (s.env !== undefined || s.headers !== undefined || (s.secretCipher && !pending)) changed = true;
return { server: out, changed, pending };
}
const maskRecord = (r: Record<string, string> | undefined) => (r ? Object.fromEntries(Object.entries(r).map(([k, v]) => [k, maskSecret(v)])) : undefined);
/** What the admin API returns: keys visible, values masked. */
@@ -68,7 +135,7 @@ export function maskMcpServer(s: McpServerConfig): McpServerConfig {
*/
export function unmaskMcpServer(posted: McpServerConfig, previous: McpServerConfig[]): McpServerConfig {
const prev = previous.find((p) => p.id === posted.id);
const fill = (field: "env" | "headers") => {
const fill = (field: SecretField) => {
const r = posted[field];
if (!r) return undefined;
return Object.fromEntries(Object.entries(r).map(([k, v]) => {
+67 -18
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@@ -1,6 +1,6 @@
import type { Db } from "@stc/db";
import type { SecretBox } from "./crypto";
import { maskMcpServer, openMcpServer, sealMcpServer, unmaskMcpServer, type StoredMcpServer } from "./mcp/secrets";
import { byokAad, SERVER_KEY_AAD, type SecretBox } from "./crypto";
import { maskMcpServer, openMcpServer, sealMcpServer, unmaskMcpServer, type OpenedMcpServer, type SecretField, type StoredMcpServer } from "./mcp/secrets";
import { upgradeAiData } from "./upgrade";
export { maskSecret, MaskedSecretError } from "./mcp/secrets";
@@ -21,20 +21,28 @@ export interface McpServerConfig {
headers?: Record<string, string>;
/** Courses this server is offered in. Absent or empty: every course (global). */
courseIds?: string[];
/** Save only: drop these stored fields, even if they cannot be decrypted. Never stored or returned. */
clearSecrets?: SecretField[];
}
/** A stored secret the current STC_SECRET cannot open. It is kept until the admin replaces or clears it. */
export type UnreadableSecret =
| { kind: "api-key" }
| { kind: "mcp"; serverId: string; name: string; field: SecretField };
/**
* `allowedBaseUrls`: origins learners' own keys (BYOK) may be sent to, besides the official endpoints.
* `mcpServers` here carry masked `env`/`headers` values (see mcp/secrets.ts); full values: mcpServersWithSecrets().
*/
export interface ServerSettings { provider: PublicProviderConfig | null; mcpServers: McpServerConfig[]; allowedBaseUrls: string[] }
export interface ServerSettings { provider: PublicProviderConfig | null; mcpServers: McpServerConfig[]; allowedBaseUrls: string[]; unreadableSecrets: UnreadableSecret[] }
export interface ServerSettingsInput {
provider: (ProviderConfig & { apiKey?: string; clearApiKey?: boolean }) | null;
mcpServers: McpServerConfig[];
/** Omitted: keep the saved list. */
allowedBaseUrls?: string[];
}
export interface UserSettings { byok: PublicProviderConfig | null; mentorOff: Record<string, boolean> }
/** `keyUnreadable`: the saved key cannot be decrypted with the current STC_SECRET; the user must re-enter it. */
export interface UserSettings { byok: (PublicProviderConfig & { keyUnreadable?: true }) | null; mentorOff: Record<string, boolean> }
type ServerRow = { provider: ProviderConfig | null; apiKeyCipher: string | null; mcpServers: StoredMcpServer[]; allowedBaseUrls?: string[] };
type UserRow = { byok: ProviderConfig | null };
@@ -84,7 +92,13 @@ export function aiSettingsRepo(db: Db, box: SecretBox) {
const { mentorOff: _legacy, ...row } = parse(await read("user", userId), { byok: null } as UserRow & { mentorOff?: unknown });
return row;
};
const openServers = async (r: ServerRow) => Promise.all((r.mcpServers ?? []).map((m) => openMcpServer(box, m)));
const storedServers = (r: ServerRow): StoredMcpServer[] =>
(Array.isArray(r.mcpServers) ? r.mcpServers : []).filter((m) => m && typeof m === "object" && typeof m.id === "string");
const openServers = async (r: ServerRow): Promise<OpenedMcpServer[]> => Promise.all(storedServers(r).map((m) => openMcpServer(box, m)));
const openServerKey = async (r: ServerRow): Promise<string | null> =>
r.apiKeyCipher ? box.open(r.apiKeyCipher, "server-api-key", SERVER_KEY_AAD).catch(() => null) : null;
const openUserKey = async (userId: string, k: { provider: string; ciphertext: string }): Promise<string | null> =>
box.open(k.ciphertext, "byok", byokAad(userId, k.provider)).catch(() => null);
const keyRow = async (userId: string) =>
(await db.sql`SELECT provider, ciphertext FROM user_api_keys WHERE user_id = ${userId}`)[0] as { provider: string; ciphertext: string } | undefined;
@@ -94,30 +108,60 @@ export function aiSettingsRepo(db: Db, box: SecretBox) {
async getServer(): Promise<ServerSettings> {
await ready();
const r = await serverRow();
const mcpServers = (await openServers(r)).map(maskMcpServer);
return { provider: r.provider ? { ...r.provider, hasApiKey: !!r.apiKeyCipher } : null, mcpServers, allowedBaseUrls: r.allowedBaseUrls ?? [] };
const opened = await openServers(r);
const unreadableSecrets: UnreadableSecret[] = [];
if (r.provider && r.apiKeyCipher && (await openServerKey(r)) === null) unreadableSecrets.push({ kind: "api-key" });
for (const o of opened) for (const field of o.unreadable) unreadableSecrets.push({ kind: "mcp", serverId: o.cfg.id, name: o.cfg.name, field });
return {
provider: r.provider ? { ...r.provider, hasApiKey: !!r.apiKeyCipher } : null,
mcpServers: opened.map((o) => maskMcpServer(o.cfg)),
allowedBaseUrls: r.allowedBaseUrls ?? [],
unreadableSecrets,
};
},
/** Server code only: MCP servers with their real env and headers. */
/** The admin provider without opening any secret (for resolving which provider a request uses). */
async serverProvider(): Promise<PublicProviderConfig | null> {
await ready();
const r = await serverRow();
return r.provider ? { ...r.provider, hasApiKey: !!r.apiKeyCipher } : null;
},
/** The admin's BYOK allowlist, without opening any secret. */
async allowedBaseUrls(): Promise<string[]> {
await ready();
return (await serverRow()).allowedBaseUrls ?? [];
},
/** Server code only: MCP servers with their real env and headers (unreadable fields left out). */
async mcpServersWithSecrets(): Promise<McpServerConfig[]> {
await ready();
return openServers(await serverRow());
return (await openServers(await serverRow())).map((o) => o.cfg);
},
/** A posted (masked) MCP config with stored values filled in; throws MaskedSecretError for a stray mask. */
async resolveMcpMasks(cfg: McpServerConfig): Promise<McpServerConfig> {
await ready();
return unmaskMcpServer(cfg, await openServers(await serverRow()));
const { clearSecrets: _c, ...rest } = unmaskMcpServer(cfg, (await openServers(await serverRow())).map((o) => o.cfg));
return rest;
},
/**
* Saves the admin settings. Secrets that cannot be decrypted are never discarded implicitly: the API key stays
* unless replaced or cleared (clearApiKey), and an MCP field stays unless new values are posted or the field is
* listed in that server's clearSecrets.
*/
async saveServer(input: ServerSettingsInput): Promise<void> {
await ready();
const prev = await serverRow();
let apiKeyCipher: string | null = null;
if (input.provider) {
if (input.provider.apiKey) apiKeyCipher = await box.encrypt(input.provider.apiKey);
if (input.provider.apiKey) apiKeyCipher = await box.seal(input.provider.apiKey, "server-api-key", SERVER_KEY_AAD);
else if (!input.provider.clearApiKey) apiKeyCipher = prev.apiKeyCipher;
}
const previous = await openServers(prev);
const unmasked = (input.mcpServers ?? []).map((m) => unmaskMcpServer(m, previous));
const mcpServers = await Promise.all(unmasked.map((m) => sealMcpServer(box, m)));
const stored = storedServers(prev);
const opened = await openServers(prev);
const previous = opened.map((o) => o.cfg);
const mcpServers: StoredMcpServer[] = [];
for (const m of input.mcpServers ?? []) {
const i = stored.findIndex((x) => x.id === m.id);
mcpServers.push(await sealMcpServer(box, unmaskMcpServer(m, previous), i >= 0 ? { stored: stored[i]!, unreadable: opened[i]!.unreadable } : undefined));
}
await write("server", "", {
provider: input.provider ? pickProvider(input.provider) : null,
apiKeyCipher,
@@ -128,18 +172,23 @@ export function aiSettingsRepo(db: Db, box: SecretBox) {
async serverApiKey(): Promise<string | null> {
await ready();
const r = await serverRow();
return r.provider && r.apiKeyCipher ? box.decrypt(r.apiKeyCipher) : null;
return r.provider ? openServerKey(r) : null;
},
async getUser(userId: string): Promise<UserSettings> {
await ready();
const r = await userRow(userId);
const k = await keyRow(userId);
const prefs = (await db.sql`SELECT course_id FROM ai_mentor_prefs WHERE user_id = ${userId} AND off = 1`) as { course_id: string }[];
return { byok: r.byok && k ? { ...r.byok, hasApiKey: true } : null, mentorOff: Object.fromEntries(prefs.map((p) => [p.course_id, true])) };
let byok: UserSettings["byok"] = null;
if (r.byok && k) {
byok = { ...r.byok, hasApiKey: true };
if ((await openUserKey(userId, k)) === null) byok.keyUnreadable = true;
}
return { byok, mentorOff: Object.fromEntries(prefs.map((p) => [p.course_id, true])) };
},
async saveUserKey(userId: string, cfg: ProviderConfig & { apiKey: string }): Promise<void> {
await ready();
const ciphertext = await box.encrypt(cfg.apiKey);
const ciphertext = await box.seal(cfg.apiKey, "byok", byokAad(userId, cfg.kind));
const now = new Date().toISOString();
await db.sql.begin(async (tx) => {
await tx`DELETE FROM user_api_keys WHERE user_id = ${userId}`;
@@ -157,7 +206,7 @@ export function aiSettingsRepo(db: Db, box: SecretBox) {
async userApiKey(userId: string): Promise<string | null> {
await ready();
const k = await keyRow(userId);
return k ? box.decrypt(k.ciphertext) : null;
return k ? openUserKey(userId, k) : null;
},
async setMentorOff(userId: string, courseId: string, off: boolean): Promise<void> {
await ready();
+69 -16
View File
@@ -1,9 +1,11 @@
import type { Db } from "@stc/db";
import type { SecretBox } from "./crypto";
import { sealMcpServer, type StoredMcpServer } from "./mcp/secrets";
import { byokAad, isLegacyToken, SERVER_KEY_AAD, type SecretBox } from "./crypto";
import { upgradeStoredMcpServer, type StoredMcpServer } from "./mcp/secrets";
/** Recorded in schema_migrations once the data upgrade has run (no `.sql` suffix, so no file can share it). */
export const AI_DATA_UPGRADE = "ai_data_v11";
/** Recorded once no secret is left in a pre-v2 format. */
export const AI_SECRETS_UPGRADE = "ai_secrets_v2";
type Tx = Bun.TransactionSQL;
@@ -31,28 +33,79 @@ async function moveMentorToggles(tx: Tx, now: string) {
}
}
/** v1 stored MCP `env`/`headers` in plaintext in the server row; seal them like API keys. */
async function sealMcpSecrets(tx: Tx, box: SecretBox, now: string) {
/**
* Re-seals every secret still in an older format as a v2 token (own HKDF key per purpose, AAD bound to the row):
* BYOK keys, the server API key, and MCP env/headers (v1 plaintext or the draft `secretCipher`). A v1 token that
* does not open (STC_SECRET changed) is left untouched and the step stays pending, so it is retried on every start
* and completes once the previous secret is restored. Returns { changed, pending }.
*/
async function resealSecrets(tx: Tx, box: SecretBox, now: string): Promise<{ changed: boolean; pending: boolean }> {
let changed = false;
let pending = false;
const keys = (await tx`SELECT user_id, provider, ciphertext FROM user_api_keys`) as { user_id: string; provider: string; ciphertext: string }[];
for (const k of keys) {
if (!isLegacyToken(k.ciphertext)) continue;
let plain: string;
try { plain = await box.openLegacy(k.ciphertext); } catch { pending = true; continue; }
const sealed = await box.seal(plain, "byok", byokAad(k.user_id, k.provider));
await tx`UPDATE user_api_keys SET ciphertext = ${sealed} WHERE user_id = ${k.user_id} AND provider = ${k.provider}`;
changed = true;
}
const rows = (await tx`SELECT config_json FROM ai_settings WHERE scope = 'server' AND owner_id = ''`) as { config_json: string }[];
const cfg = rows[0] ? parseObject(rows[0].config_json) : null;
if (!cfg || !Array.isArray(cfg.mcpServers)) return;
const servers = cfg.mcpServers as StoredMcpServer[];
if (!servers.some((s) => s && (s.env || s.headers))) return;
const mcpServers = await Promise.all(servers.map((s) => (s && (s.env || s.headers) ? sealMcpServer(box, s) : s)));
await tx`UPDATE ai_settings SET config_json = ${JSON.stringify({ ...cfg, mcpServers })}, updated_at = ${now} WHERE scope = 'server' AND owner_id = ''`;
if (!cfg) return { changed, pending };
let rowChanged = false;
if (typeof cfg.apiKeyCipher === "string" && isLegacyToken(cfg.apiKeyCipher)) {
try {
cfg.apiKeyCipher = await box.seal(await box.openLegacy(cfg.apiKeyCipher), "server-api-key", SERVER_KEY_AAD);
rowChanged = true;
} catch { pending = true; }
}
if (Array.isArray(cfg.mcpServers)) {
const servers: unknown[] = [];
for (const s of cfg.mcpServers) {
// Malformed entries are kept as they are (the settings code skips them); they must not stop the upgrade.
if (!s || typeof s !== "object" || typeof (s as StoredMcpServer).id !== "string") { servers.push(s); continue; }
const r = await upgradeStoredMcpServer(box, s as StoredMcpServer);
servers.push(r.server);
if (r.changed) rowChanged = true;
if (r.pending) pending = true;
}
cfg.mcpServers = servers;
}
if (rowChanged) {
await tx`UPDATE ai_settings SET config_json = ${JSON.stringify(cfg)}, updated_at = ${now} WHERE scope = 'server' AND owner_id = ''`;
changed = true;
}
return { changed, pending };
}
/**
* Data the v1.1 SQL migrations cannot move portably. Runs after the package's migrations, in one transaction,
* once (marked in schema_migrations). Returns true if it ran now. The settings repo awaits it before first use.
* Data the v1.1 SQL migrations cannot move portably, in one transaction. Each step is recorded in schema_migrations
* when complete (names without `.sql`, so no file can share them):
* - `ai_data_v11`: per-course mentor toggles from config_json to ai_mentor_prefs;
* - `ai_secrets_v2`: every secret re-sealed in the v2 format (marked only when nothing legacy is left).
* Returns true if it changed anything now. The settings repo awaits it before first use.
*/
export async function upgradeAiData(db: Db, box: SecretBox): Promise<boolean> {
return db.sql.begin(async (tx) => {
if ((await tx`SELECT name FROM schema_migrations WHERE name = ${AI_DATA_UPGRADE}`).length) return false;
const done = new Set(((await tx`SELECT name FROM schema_migrations WHERE name IN (${AI_DATA_UPGRADE}, ${AI_SECRETS_UPGRADE})`) as { name: string }[]).map((r) => r.name));
const now = new Date().toISOString();
await moveMentorToggles(tx, now);
await sealMcpSecrets(tx, box, now);
await tx`INSERT INTO schema_migrations (name, applied_at) VALUES (${AI_DATA_UPGRADE}, ${now})`;
return true;
let changed = false;
if (!done.has(AI_DATA_UPGRADE)) {
await moveMentorToggles(tx, now);
await tx`INSERT INTO schema_migrations (name, applied_at) VALUES (${AI_DATA_UPGRADE}, ${now})`;
changed = true;
}
if (!done.has(AI_SECRETS_UPGRADE)) {
const r = await resealSecrets(tx, box, now);
if (r.changed) changed = true;
if (!r.pending) {
await tx`INSERT INTO schema_migrations (name, applied_at) VALUES (${AI_SECRETS_UPGRADE}, ${now})`;
changed = true;
}
}
return changed;
});
}
@@ -1,10 +1,10 @@
import { useEffect, useState } from "react";
import { Pill } from "@stc/ui";
import { api, ApiError } from "./api";
import { Field, PageHead } from "./components";
import { Field, PageHead, UNREADABLE_KEY_TEXT } from "./components";
interface Account {
byok: { kind: "anthropic" | "openai"; model?: string; baseUrl?: string; hasApiKey: boolean } | null;
byok: { kind: "anthropic" | "openai"; model?: string; baseUrl?: string; hasApiKey: boolean; keyUnreadable?: boolean } | null;
serverProvider: { kind: string; model: string | null } | null;
}
@@ -51,7 +51,8 @@ export default function AccountAiPage() {
</p>
</PageHead>
{acct.byok ? <p className="ai-banner" role="status">A {acct.byok.kind === "anthropic" ? "Anthropic" : "OpenAI-compatible"} key is saved{acct.byok.model ? ` (model ${acct.byok.model})` : ""}.</p> : null}
{acct.byok?.keyUnreadable ? <p className="ai-error" role="alert">{UNREADABLE_KEY_TEXT}</p> : null}
{acct.byok && !acct.byok.keyUnreadable ? <p className="ai-banner" role="status">A {acct.byok.kind === "anthropic" ? "Anthropic" : "OpenAI-compatible"} key is saved{acct.byok.model ? ` (model ${acct.byok.model})` : ""}.</p> : null}
<form onSubmit={(e) => { e.preventDefault(); save(); }}>
<div className="ai-grid">
+18 -4
View File
@@ -1,14 +1,14 @@
import { useEffect, useState } from "react";
import { Pill } from "@stc/ui";
import { api, ApiError } from "./api";
import { Field, PageHead } from "./components";
import { Field, PageHead, UnreadableSecretsWarning, type UnreadableSecretItem } from "./components";
type Kind = "" | "anthropic" | "openai";
interface ProviderOut { kind: "anthropic" | "openai"; model?: string; baseUrl?: string; effort?: string; hasApiKey: boolean }
interface McpServer { id: string; name: string; transport: "stdio" | "http"; command?: string; args?: string[]; env?: Record<string, string>; url?: string; headers?: Record<string, string>; courseIds?: string[] }
interface Config { provider: ProviderOut | null; mcpServers: McpServer[]; allowedBaseUrls: string[] }
interface McpServer { id: string; name: string; transport: "stdio" | "http"; command?: string; args?: string[]; env?: Record<string, string>; url?: string; headers?: Record<string, string>; courseIds?: string[]; clearSecrets?: ("env" | "headers")[] }
interface Config { provider: ProviderOut | null; mcpServers: McpServer[]; allowedBaseUrls: string[]; unreadableSecrets?: UnreadableSecretItem[] }
type ServerDraft = { id: string; name: string; transport: "stdio" | "http"; command: string; args: string; env: string; url: string; headers?: Record<string, string>; courses: string; test?: string };
type ServerDraft = { id: string; name: string; transport: "stdio" | "http"; command: string; args: string; env: string; url: string; headers?: Record<string, string>; courses: string; test?: string; clearSecrets?: ("env" | "headers")[] };
const toDraft = (s: McpServer): ServerDraft => ({
id: s.id, name: s.name, transport: s.transport, command: s.command ?? "", args: (s.args ?? []).join(" "),
env: Object.entries(s.env ?? {}).map(([k, v]) => `${k}=${v}`).join("\n"), url: s.url ?? "", headers: s.headers, courses: (s.courseIds ?? []).join(", "),
@@ -19,6 +19,7 @@ const fromDraft = (d: ServerDraft): McpServer => ({
id: d.id, name: d.name || d.id, transport: d.transport,
...(d.transport === "stdio" ? { command: d.command, args: d.args.trim() ? d.args.trim().split(/\s+/) : [], env: parseEnv(d.env) } : { url: d.url, ...(d.headers ? { headers: d.headers } : {}) }),
courseIds: d.courses.split(",").map((s) => s.trim()).filter(Boolean),
...(d.clearSecrets?.length ? { clearSecrets: d.clearSecrets } : {}),
});
export default function AdminAiPage() {
@@ -80,6 +81,19 @@ export default function AdminAiPage() {
<p>AI is off until you choose a provider here. Learners and authors can also add their own key, which is used only for their own requests. Keys are encrypted on the server and never shown again.</p>
</PageHead>
<UnreadableSecretsWarning
items={loaded.unreadableSecrets ?? []}
action={(item) => {
if (item.kind !== "mcp") return <span className="ai-hint">Paste the key again below, or tick "Remove the saved key".</span>;
const i = servers.findIndex((x) => x.id === item.serverId);
const marked = i >= 0 && !!servers[i]!.clearSecrets?.includes(item.field);
if (i < 0) return null;
return marked ? <span className="ai-hint">Will be discarded when you save.</span> : (
<Pill variant="ghost" onClick={() => setServer(i, { clearSecrets: [...(servers[i]!.clearSecrets ?? []), item.field] })}>Discard stored value</Pill>
);
}}
/>
<form onSubmit={(e) => { e.preventDefault(); save(); }}>
<section className="ai-section">
<h2>Server provider</h2>
@@ -75,3 +75,25 @@ export function Markdown({ text }: { text: string }) {
}
return <div className="ai-md">{blocks}</div>;
}
/** A stored secret the server cannot decrypt (mirrors UnreadableSecret in settings.ts). */
export type UnreadableSecretItem = { kind: "api-key" } | { kind: "mcp"; serverId: string; name: string; field: "env" | "headers" };
export const UNREADABLE_SECRETS_TEXT = "Some stored secrets can't be decrypted with the current STC_SECRET. Re-enter them or restore the previous secret.";
export const UNREADABLE_KEY_TEXT = "Your saved key can't be used; please re-enter it.";
const describeSecret = (s: UnreadableSecretItem) =>
s.kind === "api-key" ? "Server provider: API key" : `MCP server "${s.name}" (${s.serverId}): ${s.field === "env" ? "environment" : "headers"}`;
/** Admin warning listing each affected server and field. Nothing is discarded until the admin replaces or clears it. */
export function UnreadableSecretsWarning({ items, action }: { items: UnreadableSecretItem[]; action?: (item: UnreadableSecretItem) => ReactNode }) {
if (!items.length) return null;
return (
<div className="ai-error" role="alert">
<p>{UNREADABLE_SECRETS_TEXT}</p>
<ul>
{items.map((s, i) => <li key={i}>{describeSecret(s)}{action ? <> {action(s)}</> : null}</li>)}
</ul>
</div>
);
}
+35 -11
View File
@@ -1,27 +1,51 @@
import { expect, test } from "bun:test";
import { createSecretBox } from "../src/crypto";
import { byokAad, createSecretBox, legacyV1Encrypt, mcpAad, SERVER_KEY_AAD } from "../src/crypto";
test("round trips and uses a fresh IV each time", async () => {
const box = createSecretBox("s3cret");
const a = await box.encrypt("sk-ant-123");
const b = await box.encrypt("sk-ant-123");
const a = await box.seal("sk-ant-123", "byok", byokAad("u1", "anthropic"));
const b = await box.seal("sk-ant-123", "byok", byokAad("u1", "anthropic"));
expect(a).not.toBe(b);
expect(a).not.toContain("sk-ant-123");
expect(a.startsWith("v1.")).toBe(true);
expect(await box.decrypt(a)).toBe("sk-ant-123");
expect(await box.decrypt(b)).toBe("sk-ant-123");
expect(a.startsWith("v2.")).toBe(true);
expect(await box.open(a, "byok", byokAad("u1", "anthropic"))).toBe("sk-ant-123");
expect(await box.open(b, "byok", byokAad("u1", "anthropic"))).toBe("sk-ant-123");
});
test("another secret cannot decrypt", async () => {
const token = await createSecretBox("one").encrypt("key");
await expect(createSecretBox("two").decrypt(token)).rejects.toThrow();
const token = await createSecretBox("one").seal("key", "byok", "a");
await expect(createSecretBox("two").open(token, "byok", "a")).rejects.toThrow();
});
test("a tampered token is rejected", async () => {
const token = await createSecretBox("one").encrypt("key");
const box = createSecretBox("one");
const token = await box.seal("key", "byok", "a");
const parts = token.split(".");
const ct = Buffer.from(parts[2]!, "base64");
ct[0] = ct[0]! ^ 1;
await expect(createSecretBox("one").decrypt(`${parts[0]}.${parts[1]}.${ct.toString("base64")}`)).rejects.toThrow();
await expect(createSecretBox("one").decrypt("garbage")).rejects.toThrow();
await expect(box.open(`${parts[0]}.${parts[1]}.${ct.toString("base64")}`, "byok", "a")).rejects.toThrow();
await expect(box.open("garbage", "byok", "a")).rejects.toThrow();
});
test("a token opens only for its own purpose and row (domain separation and AAD)", async () => {
const box = createSecretBox("one");
const byok = await box.seal("sk-user", "byok", byokAad("u1", "anthropic"));
await expect(box.open(byok, "byok", byokAad("u2", "anthropic"))).rejects.toThrow(); // another user
await expect(box.open(byok, "byok", byokAad("u1", "openai"))).rejects.toThrow(); // another provider
await expect(box.open(byok, "server-api-key", SERVER_KEY_AAD)).rejects.toThrow(); // another purpose
await expect(box.open(byok, "mcp", byokAad("u1", "anthropic"))).rejects.toThrow(); // same AAD, other HKDF key
const env = await box.seal("{}", "mcp", mcpAad("fs", "env"));
await expect(box.open(env, "mcp", mcpAad("fs", "headers"))).rejects.toThrow();
await expect(box.open(env, "mcp", mcpAad("web", "env"))).rejects.toThrow();
await expect(box.open(env, "byok", mcpAad("fs", "env"))).rejects.toThrow();
});
test("v1 tokens open only through openLegacy, and v2 tokens never do", async () => {
const box = createSecretBox("one");
const v1 = await legacyV1Encrypt("one", "old-key");
expect(v1.startsWith("v1.")).toBe(true);
expect(await box.openLegacy(v1)).toBe("old-key");
await expect(box.open(v1, "byok", byokAad("u1", "anthropic"))).rejects.toThrow(/format/);
await expect(box.openLegacy(await box.seal("x", "byok", "a"))).rejects.toThrow(/format/);
await expect(createSecretBox("two").openLegacy(v1)).rejects.toThrow();
});
+30
View File
@@ -283,3 +283,33 @@ forEachDb("the admin API masks MCP secrets, and the test button and chat use the
expect(seen.length).toBeGreaterThan(0);
expect(seen.filter(Boolean).every((h) => h === "Bearer hdr-SECRET-abcdef")).toBe(true);
});
forEachDb("after an STC_SECRET change the admin and the user are told, and an unchanged save keeps every secret", async (db) => {
const before = await setup(db, [() => ({ text: "ok" })], {}, { secret: "old-secret" });
const web = { id: "web", name: "Web", transport: "http", url: "https://mcp.example.com/mcp", headers: { authorization: "Bearer hdr-SECRET-abcdef" } };
await before.call("PUT", "/api/ai/admin/config", "owner", { provider: { kind: "anthropic", apiKey: "sk-ant-OLD" }, mcpServers: [web] });
await before.call("PUT", "/api/ai/account/key", "ann", { kind: "anthropic", apiKey: "sk-ann-OLD" });
const logs: string[] = [];
const { call } = await setup(db, [() => ({ text: "ok" })], { log: (m) => logs.push(m) }, { secret: "new-secret" });
const cfg = await (await call("GET", "/api/ai/admin/config", "owner")).json();
expect(cfg.unreadableSecrets).toEqual([{ kind: "api-key" }, { kind: "mcp", serverId: "web", name: "Web", field: "headers" }]);
expect(cfg.mcpServers[0].headers).toBeUndefined();
for (let i = 0; i < 100 && !logs.length; i++) await Bun.sleep(5); // the startup check runs in the background
expect(logs.some((l) => l.includes("cannot be decrypted"))).toBe(true);
const acct = await (await call("GET", "/api/ai/account", "ann")).json();
expect(acct.byok).toEqual({ kind: "anthropic", hasApiKey: true, keyUnreadable: true });
// Saving the page as shown (the admin only changes the model) keeps the API key and the MCP header.
expect((await call("PUT", "/api/ai/admin/config", "owner", { provider: { kind: "anthropic", model: "claude-sonnet-5-5" }, mcpServers: cfg.mcpServers })).status).toBe(200);
const back = await setup(db, [() => ({ text: "ok" })], {}, { secret: "old-secret" });
const restored = await (await back.call("GET", "/api/ai/admin/config", "owner")).json();
expect(restored.unreadableSecrets).toEqual([]);
expect(restored.mcpServers[0].headers).toEqual({ authorization: "••••cdef" });
expect((await (await back.call("GET", "/api/ai/account", "ann")).json()).byok.keyUnreadable).toBeUndefined();
// An explicit clear is accepted; a malformed one is refused.
expect((await call("PUT", "/api/ai/admin/config", "owner", { provider: null, mcpServers: [{ ...cfg.mcpServers[0], clearSecrets: ["cookies"] }] })).status).toBe(400);
expect((await call("PUT", "/api/ai/admin/config", "owner", { provider: null, mcpServers: [{ ...cfg.mcpServers[0], clearSecrets: ["headers"] }] })).status).toBe(200);
expect((await (await call("GET", "/api/ai/admin/config", "owner")).json()).unreadableSecrets).toEqual([]);
});
+90 -5
View File
@@ -7,7 +7,7 @@ const box = createSecretBox("test-secret");
forEachDb("server config is empty by default and hides the key", async (db) => {
const r = aiSettingsRepo(db, box);
expect(await r.getServer()).toEqual({ provider: null, mcpServers: [], allowedBaseUrls: [] });
expect(await r.getServer()).toEqual({ provider: null, mcpServers: [], allowedBaseUrls: [], unreadableSecrets: [] });
expect(await r.serverApiKey()).toBeNull();
await r.saveServer({ provider: { kind: "anthropic", model: "claude-opus-5-5", apiKey: "sk-ant-SECRET" }, mcpServers: [] });
@@ -115,9 +115,94 @@ forEachDb("MCP env and headers are encrypted, masked when read and kept when the
.toEqual({ id: "fs", name: "Files", transport: "stdio", command: "mcp-fs", env: { FS_TOKEN: "tok-ROTATED-999999" } });
});
forEachDb("MCP secrets sealed with another STC_SECRET are dropped, not crashed on", async (db) => {
await aiSettingsRepo(db, createSecretBox("old-secret")).saveServer({ provider: null, mcpServers: [{ id: "fs", name: "Files", transport: "stdio", command: "x", env: { T: "tok-SECRET-123456" } }] });
forEachDb("unreadable MCP secrets are reported, kept on save, and recover when the old STC_SECRET returns", async (db) => {
const old = aiSettingsRepo(db, createSecretBox("old-secret"));
await old.saveServer({ provider: null, mcpServers: [
{ id: "fs", name: "Files", transport: "stdio", command: "x", env: { T: "tok-SECRET-123456" } },
{ id: "web", name: "Web", transport: "http", url: "https://mcp.example.com/mcp", headers: { authorization: "Bearer hdr-SECRET-abcdef" } },
] });
const r = aiSettingsRepo(db, box); // STC_SECRET changed
const shown = await r.getServer();
expect(shown.mcpServers).toEqual([
{ id: "fs", name: "Files", transport: "stdio", command: "x" },
{ id: "web", name: "Web", transport: "http", url: "https://mcp.example.com/mcp" },
]);
expect(shown.unreadableSecrets).toEqual([
{ kind: "mcp", serverId: "fs", name: "Files", field: "env" },
{ kind: "mcp", serverId: "web", name: "Web", field: "headers" },
]);
expect(await r.mcpServersWithSecrets()).toEqual(shown.mcpServers);
// The admin saves the page for another reason: the unreadable ciphers survive.
const before = JSON.parse((await db.sql`SELECT config_json FROM ai_settings WHERE scope = 'server'`)[0].config_json);
await r.saveServer({ provider: { kind: "openai", baseUrl: "http://ollama:11434/v1", model: "llama3" }, mcpServers: shown.mcpServers });
const after = JSON.parse((await db.sql`SELECT config_json FROM ai_settings WHERE scope = 'server'`)[0].config_json);
expect(after.mcpServers[0].envCipher).toBe(before.mcpServers[0].envCipher);
expect(after.mcpServers[1].headersCipher).toBe(before.mcpServers[1].headersCipher);
expect((await r.getServer()).unreadableSecrets).toHaveLength(2);
// Restoring the previous secret brings them back.
expect((await aiSettingsRepo(db, createSecretBox("old-secret")).mcpServersWithSecrets()).map((m) => m.env ?? m.headers)).toEqual([
{ T: "tok-SECRET-123456" }, { authorization: "Bearer hdr-SECRET-abcdef" },
]);
// Explicit replace (new values) and explicit clear (clearSecrets) are the only ways to drop them.
await r.saveServer({ provider: null, mcpServers: [
{ id: "fs", name: "Files", transport: "stdio", command: "x", env: { T: "tok-NEW-0000000000" } },
{ id: "web", name: "Web", transport: "http", url: "https://mcp.example.com/mcp", clearSecrets: ["headers"] },
] });
expect(await r.mcpServersWithSecrets()).toEqual([
{ id: "fs", name: "Files", transport: "stdio", command: "x", env: { T: "tok-NEW-0000000000" } },
{ id: "web", name: "Web", transport: "http", url: "https://mcp.example.com/mcp" },
]);
expect((await r.getServer()).unreadableSecrets).toEqual([]);
expect((await db.sql`SELECT config_json FROM ai_settings WHERE scope = 'server'`)[0].config_json).not.toContain("clearSecrets");
});
forEachDb("an MCP cipher swapped onto another server or field does not open", async (db) => {
const r = aiSettingsRepo(db, box);
expect((await r.getServer()).mcpServers).toEqual([{ id: "fs", name: "Files", transport: "stdio", command: "x" }]);
expect(await r.mcpServersWithSecrets()).toEqual([{ id: "fs", name: "Files", transport: "stdio", command: "x" }]);
await r.saveServer({ provider: null, mcpServers: [
{ id: "a", name: "A", transport: "http", url: "https://a.example.com/mcp", headers: { authorization: "Bearer A-SECRET-111111" } },
{ id: "b", name: "B", transport: "http", url: "https://b.example.com/mcp", headers: { authorization: "Bearer B-SECRET-222222" } },
{ id: "c", name: "C", transport: "stdio", command: "x", env: { T: "C-SECRET-33333333" } },
] });
const row = JSON.parse((await db.sql`SELECT config_json FROM ai_settings WHERE scope = 'server'`)[0].config_json);
// swap a <-> b, and move c's env cipher into a headers slot of c
[row.mcpServers[0].headersCipher, row.mcpServers[1].headersCipher] = [row.mcpServers[1].headersCipher, row.mcpServers[0].headersCipher];
row.mcpServers[2].headersCipher = row.mcpServers[2].envCipher;
delete row.mcpServers[2].envCipher;
await db.sql`UPDATE ai_settings SET config_json = ${JSON.stringify(row)} WHERE scope = 'server'`;
const full = await r.mcpServersWithSecrets();
expect(full.every((m) => !m.headers && !m.env)).toBe(true);
expect((await r.getServer()).unreadableSecrets.map((u) => u.kind === "mcp" && `${u.serverId}.${u.field}`)).toEqual(["a.headers", "b.headers", "c.headers"]);
});
forEachDb("a BYOK ciphertext copied to another user, or into an MCP slot, does not open", async (db) => {
const r = aiSettingsRepo(db, box);
await r.saveUserKey("u1", { kind: "anthropic", apiKey: "sk-u1-SECRET" });
await r.saveUserKey("u2", { kind: "anthropic", apiKey: "sk-u2-other" });
const u1 = (await db.sql`SELECT ciphertext FROM user_api_keys WHERE user_id = 'u1'`)[0].ciphertext as string;
await db.sql`UPDATE user_api_keys SET ciphertext = ${u1} WHERE user_id = 'u2'`;
expect(await r.userApiKey("u2")).toBeNull();
expect((await r.getUser("u2")).byok).toEqual({ kind: "anthropic", hasApiKey: true, keyUnreadable: true });
expect(await r.userApiKey("u1")).toBe("sk-u1-SECRET");
expect((await r.getUser("u1")).byok).toEqual({ kind: "anthropic", hasApiKey: true });
// into the server API key and an MCP field: no oracle
await r.saveServer({ provider: { kind: "anthropic", apiKey: "sk-server" }, mcpServers: [{ id: "m", name: "M", transport: "http", url: "https://m.example.com/mcp", headers: { x: "y-123456789012" } }] });
const row = JSON.parse((await db.sql`SELECT config_json FROM ai_settings WHERE scope = 'server'`)[0].config_json);
row.apiKeyCipher = u1;
row.mcpServers[0].headersCipher = u1;
await db.sql`UPDATE ai_settings SET config_json = ${JSON.stringify(row)} WHERE scope = 'server'`;
expect(await r.serverApiKey()).toBeNull();
expect((await r.mcpServersWithSecrets())[0]!.headers).toBeUndefined();
expect((await r.getServer()).unreadableSecrets).toEqual([{ kind: "api-key" }, { kind: "mcp", serverId: "m", name: "M", field: "headers" }]);
});
forEachDb("an unreadable server API key is reported and kept on save", async (db) => {
await aiSettingsRepo(db, createSecretBox("old-secret")).saveServer({ provider: { kind: "anthropic", apiKey: "sk-ant-OLD" }, mcpServers: [] });
const r = aiSettingsRepo(db, box);
expect((await r.getServer()).unreadableSecrets).toEqual([{ kind: "api-key" }]);
expect(await r.serverApiKey()).toBeNull();
await r.saveServer({ provider: { kind: "anthropic", model: "claude-opus-5-5" }, mcpServers: [] });
expect(await aiSettingsRepo(db, createSecretBox("old-secret")).serverApiKey()).toBe("sk-ant-OLD");
});
+81 -9
View File
@@ -2,13 +2,16 @@ import { expect } from "bun:test";
import { migrate, type Db } from "@stc/db";
// Core migrations only: the ai_* tables exactly as v1 shipped them.
import { forEachDb as forEachV1Db } from "../../db/test/helpers";
import { createSecretBox } from "../src/crypto";
import { byokAad, createSecretBox, legacyV1Encrypt, mcpAad, SERVER_KEY_AAD } from "../src/crypto";
import { migrationsDirs } from "../src/migrations";
import { aiSettingsRepo } from "../src/settings";
import { upgradeAiData } from "../src/upgrade";
import { AI_SECRETS_UPGRADE, upgradeAiData } from "../src/upgrade";
const T = "2026-10-01T00:00:00.000Z";
const box = createSecretBox("test-secret");
const SECRET = "test-secret";
const box = createSecretBox(SECRET);
/** A secret as v1 stored it (one key, no additional data). */
const v1Token = (plain: string, secret = SECRET) => legacyV1Encrypt(secret, plain);
const aiMigrations = { "feature-ai": migrationsDirs };
async function seedMessage(db: Db, id: string, conv: string, role: string, content: string) {
@@ -25,7 +28,7 @@ forEachV1Db("v1 upgrade: sources rows fold into citations_json on the assistant
await seedMessage(db, "0001-c", "c1", "sources", cites);
await seedMessage(db, "0001-d", "c1", "user", "And then?");
await seedMessage(db, "0001-e", "c1", "assistant", "Try it.");
// c2: an orphan sources row (no assistant before it) and an assistant whose next row belongs to c1's ids range
// c2: an orphan sources row (no assistant before it), then an assistant with no row after it
await seedMessage(db, "0002-a", "c2", "sources", "[]");
await seedMessage(db, "0002-b", "c2", "assistant", "Alone.");
@@ -53,7 +56,7 @@ forEachV1Db("v1 upgrade: per-course mentor toggles move from config_json to ai_m
await seedSettings(db, "user", "u1", { byok: { kind: "anthropic" }, mentorOff: { sample: true, other: false } });
await seedSettings(db, "user", "u2", { byok: null, mentorOff: {} });
await seedSettings(db, "user", "u3", "{not json");
await db.sql`INSERT INTO user_api_keys (user_id, provider, ciphertext, created_at) VALUES ('u1', 'anthropic', ${await box.encrypt("sk-u1")}, ${T})`;
await db.sql`INSERT INTO user_api_keys (user_id, provider, ciphertext, created_at) VALUES ('u1', 'anthropic', ${await v1Token("sk-u1")}, ${T})`;
expect(await migrate(db, aiMigrations)).toContain("0002_ai_mentor_prefs.sql");
expect(await upgradeAiData(db, box)).toBe(true);
@@ -84,7 +87,7 @@ forEachV1Db("v1 upgrade: the settings repo upgrades on first use", async (db) =>
});
forEachV1Db("v1 upgrade: plaintext MCP env and headers are encrypted at rest", async (db) => {
const apiKeyCipher = await box.encrypt("sk-ant-SERVER");
const apiKeyCipher = await v1Token("sk-ant-SERVER");
await seedSettings(db, "server", "", {
provider: { kind: "anthropic" }, apiKeyCipher, allowedBaseUrls: ["http://ollama:11434"],
mcpServers: [
@@ -99,10 +102,14 @@ forEachV1Db("v1 upgrade: plaintext MCP env and headers are encrypted at rest", a
const raw = (await db.sql`SELECT config_json FROM ai_settings WHERE scope = 'server'`)[0].config_json as string;
expect(raw).not.toContain("PLAIN");
const stored = JSON.parse(raw);
expect(stored.apiKeyCipher).toBe(apiKeyCipher);
expect(stored.apiKeyCipher.startsWith("v2.")).toBe(true); // re-sealed under the v2 scheme
expect(await box.open(stored.apiKeyCipher, "server-api-key", SERVER_KEY_AAD)).toBe("sk-ant-SERVER");
expect(stored.allowedBaseUrls).toEqual(["http://ollama:11434"]);
expect(stored.mcpServers.map((s: { id: string; env?: unknown; headers?: unknown; secretCipher?: string }) => [s.id, !!s.env, !!s.headers, !!s.secretCipher]))
.toEqual([["fs", false, false, true], ["web", false, false, true], ["bare", false, false, false]]);
type S = { id: string; env?: unknown; headers?: unknown; envCipher?: string; headersCipher?: string; secretCipher?: string };
expect(stored.mcpServers.map((s: S) => [s.id, !!s.env, !!s.headers, !!s.envCipher, !!s.headersCipher, !!s.secretCipher]))
.toEqual([["fs", false, false, true, false, false], ["web", false, false, false, true, false], ["bare", false, false, false, false, false]]);
expect(JSON.parse(await box.open(stored.mcpServers[0].envCipher, "mcp", mcpAad("fs", "env")))).toEqual({ FS_TOKEN: "tok-PLAIN-123456" });
expect((await db.sql`SELECT name FROM schema_migrations WHERE name = ${AI_SECRETS_UPGRADE}`)).toHaveLength(1);
const repo = aiSettingsRepo(db, box);
expect(await repo.serverApiKey()).toBe("sk-ant-SERVER");
@@ -114,3 +121,68 @@ forEachV1Db("v1 upgrade: plaintext MCP env and headers are encrypted at rest", a
const shown = JSON.stringify(await repo.getServer());
expect(shown).not.toContain("PLAIN");
});
forEachV1Db("v1.1 draft upgrade: secretCipher, v1 API keys and BYOK keys are re-sealed as v2, once", async (db) => {
// The state the first v1.1 draft left: mentor step done, MCP secrets in one v1-token secretCipher.
await migrate(db, aiMigrations);
await db.sql`INSERT INTO schema_migrations (name, applied_at) VALUES ('ai_data_v11', ${T})`;
await seedSettings(db, "server", "", {
provider: { kind: "anthropic" }, apiKeyCipher: await v1Token("sk-ant-SERVER"),
mcpServers: [
{ id: "fs", name: "Files", transport: "stdio", command: "x", secretCipher: await v1Token(JSON.stringify({ env: { T: "tok-DRAFT-123456" } })) },
{ id: "web", name: "Web", transport: "http", url: "https://w.example.com/mcp", secretCipher: await v1Token(JSON.stringify({ headers: { authorization: "Bearer DRAFT-abcdef" } })) },
"not a server",
],
});
await db.sql`INSERT INTO user_api_keys (user_id, provider, ciphertext, created_at) VALUES ('u1', 'openai', ${await v1Token("sk-u1")}, ${T})`;
await seedSettings(db, "user", "u1", { byok: { kind: "openai", model: "m" } });
expect(await upgradeAiData(db, box)).toBe(true);
const raw = (await db.sql`SELECT config_json FROM ai_settings WHERE scope = 'server'`)[0].config_json as string;
expect(raw).not.toContain("secretCipher");
expect(raw).not.toContain("\"v1.");
const ct = (await db.sql`SELECT ciphertext FROM user_api_keys WHERE user_id = 'u1'`)[0].ciphertext as string;
expect(ct.startsWith("v2.")).toBe(true);
expect(await box.open(ct, "byok", byokAad("u1", "openai"))).toBe("sk-u1");
const repo = aiSettingsRepo(db, box);
expect(await repo.serverApiKey()).toBe("sk-ant-SERVER");
expect(await repo.userApiKey("u1")).toBe("sk-u1");
expect(await repo.mcpServersWithSecrets()).toEqual([
{ id: "fs", name: "Files", transport: "stdio", command: "x", env: { T: "tok-DRAFT-123456" } },
{ id: "web", name: "Web", transport: "http", url: "https://w.example.com/mcp", headers: { authorization: "Bearer DRAFT-abcdef" } },
]);
expect((await repo.getServer()).unreadableSecrets).toEqual([]);
expect(JSON.parse(raw).mcpServers[2]).toBe("not a server"); // malformed entries are kept, not fatal
const snapshot = raw;
expect(await upgradeAiData(db, box)).toBe(false);
expect((await db.sql`SELECT config_json FROM ai_settings WHERE scope = 'server'`)[0].config_json).toBe(snapshot);
});
forEachV1Db("v1 upgrade with a changed STC_SECRET keeps old tokens, stays pending, and finishes once the secret is restored", async (db) => {
await seedSettings(db, "server", "", {
provider: { kind: "anthropic" }, apiKeyCipher: await v1Token("sk-ant-SERVER", "old-secret"),
mcpServers: [{ id: "fs", name: "Files", transport: "stdio", command: "x", env: { T: "tok-PLAIN-123456" } }],
});
await db.sql`INSERT INTO user_api_keys (user_id, provider, ciphertext, created_at) VALUES ('u1', 'anthropic', ${await v1Token("sk-u1", "old-secret")}, ${T})`;
await seedSettings(db, "user", "u1", { byok: { kind: "anthropic" } });
await migrate(db, aiMigrations);
const repo = aiSettingsRepo(db, box); // the new secret
expect(await repo.userApiKey("u1")).toBeNull();
expect((await repo.getUser("u1")).byok).toEqual({ kind: "anthropic", hasApiKey: true, keyUnreadable: true });
expect((await repo.getServer()).unreadableSecrets).toEqual([{ kind: "api-key" }]);
// plaintext MCP values do not need the old secret: sealed already
expect((await repo.mcpServersWithSecrets())[0]!.env).toEqual({ T: "tok-PLAIN-123456" });
expect((await db.sql`SELECT name FROM schema_migrations WHERE name = ${AI_SECRETS_UPGRADE}`)).toHaveLength(0);
expect(((await db.sql`SELECT ciphertext FROM user_api_keys`)[0].ciphertext as string).startsWith("v1.")).toBe(true);
// The admin puts the previous secret back: the next start re-seals and completes.
const restored = createSecretBox("old-secret");
expect(await upgradeAiData(db, restored)).toBe(true);
expect((await db.sql`SELECT name FROM schema_migrations WHERE name = ${AI_SECRETS_UPGRADE}`)).toHaveLength(1);
const again = aiSettingsRepo(db, restored);
expect(await again.userApiKey("u1")).toBe("sk-u1");
expect(await again.serverApiKey()).toBe("sk-ant-SERVER");
});
+17
View File
@@ -54,3 +54,20 @@ test("citation links use the learner's registered lesson route", async () => {
// matchPath leaves params encoded (the router decodes the pathname before matching).
expect(Object.fromEntries(Object.entries(hit?.params ?? {}).map(([k, v]) => [k, decodeURIComponent(v!)]))).toEqual({ courseId: "pure snake", lessonId: "m1-ü/x" });
});
test("the unreadable-secrets warnings name what is affected", async () => {
const { UnreadableSecretsWarning, UNREADABLE_SECRETS_TEXT, UNREADABLE_KEY_TEXT } = await import("../src/web/components");
expect(UNREADABLE_SECRETS_TEXT).toBe("Some stored secrets can't be decrypted with the current STC_SECRET. Re-enter them or restore the previous secret.");
expect(UNREADABLE_KEY_TEXT).toBe("Your saved key can't be used; please re-enter it.");
const html = renderToString(<UnreadableSecretsWarning items={[{ kind: "api-key" }, { kind: "mcp", serverId: "web", name: "Web", field: "headers" }, { kind: "mcp", serverId: "fs", name: "Files", field: "env" }]} />);
expect(html).toContain("Some stored secrets can&#x27;t be decrypted with the current STC_SECRET.");
expect(html).toContain("Server provider: API key");
expect(html).toContain("MCP server &quot;Web&quot; (web): headers");
expect(html).toContain("MCP server &quot;Files&quot; (fs): environment");
expect(html).toContain('role="alert"');
expect(renderToString(<UnreadableSecretsWarning items={[]} />)).toBe("");
const account = await Bun.file(new URL("../src/web/AccountAiPage.tsx", import.meta.url)).text();
expect(account).toContain("UNREADABLE_KEY_TEXT");
const admin = await Bun.file(new URL("../src/web/AdminAiPage.tsx", import.meta.url)).text();
expect(admin).toContain("<UnreadableSecretsWarning");
});