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HMAC-based HELM_LICENSE_SECRET\n// is deprecated.\nimport { blob } from \"https://esm.town/v/std/blob\";\nimport {\n createHash,\n createPublicKey,\n KeyObject,\n verify as cryptoVerify,\n} from \"node:crypto\";\n\n// ── Rate limiting ─────────────────────────────────────────────────────────────\nconst WINDOW_MS = 15 * 60 * 1000;\nconst MAX_ATTEMPTS = 15;\n\nasync function rateLimit(req: Request): Promise {\n const ip = req.headers.get(\"x-forwarded-for\")?.split(\",\")[0].trim() ??\n \"unknown\";\n const currentHour = Math.floor(Date.now() / (60 * 60 * 1000));\n const ipHash = createHash(\"sha256\").update(ip).digest(\"hex\").slice(0, 12);\n const blobKey = `helm_rl_${currentHour}_${ipHash}`;\n const now = Date.now();\n\n let record: { count: number; windowStart: number; v: number } =\n (await blob.getJSON(blobKey)) ?? { count: 0, windowStart: now, v: now };\n\n if (now - record.windowStart > WINDOW_MS) {\n record = { count: 0, windowStart: now, v: now };\n }\n\n if (record.count >= MAX_ATTEMPTS) {\n return Response.json({ ok: false, reason: \"rate_limited\" }, {\n status: 429,\n });\n }\n\n record.count++;\n const fresh: typeof record | null = await blob.getJSON(blobKey);\n\n if (fresh && fresh.v !== record.v) {\n const freshCount = fresh.count ?? 0;\n if (freshCount >= MAX_ATTEMPTS) {\n return Response.json({ ok: false, reason: \"rate_limited\" }, {\n status: 429,\n });\n }\n await blob.setJSON(blobKey, {\n count: freshCount + 1,\n windowStart: fresh.windowStart ?? now,\n v: Date.now(),\n });\n } else {\n await blob.setJSON(blobKey, {\n count: record.count,\n windowStart: record.windowStart,\n v: Date.now(),\n });\n }\n\n return null;\n}\n\n// ── PEM normalization ─────────────────────────────────────────────────────────\n// Env-var UIs (Val.town included) often flatten a multi-line PEM into one line\n// or insert literal \"\\n\" — both of which createPublicKey rejects. Rebuild a\n// canonical PEM from whatever survived, so the key loads regardless of mangling.\nfunction normalizePem(raw: string, label: string): string {\n const body = String(raw)\n .replace(/\\\\[nrt]/g, \"\")\n .replace(/-----BEGIN [^-]+-----/g, \"\")\n .replace(/-----END [^-]+-----/g, \"\")\n .replace(/[^A-Za-z0-9+/=]/g, \"\");\n const wrapped = body.match(/.{1,64}/g)?.join(\"\\n\") ?? \"\";\n return `-----BEGIN ${label}-----\\n${wrapped}\\n-----END ${label}-----\\n`;\n}\n\n// ── Key verification ──────────────────────────────────────────────────────────\n// Key format: HLM....\n// '.' is not a base64url character, so split is unambiguous.\nfunction verifyKey(\n key: string,\n publicKey: KeyObject,\n): { valid: boolean; email: string | null } {\n try {\n const parts = key.split(\".\");\n if (parts.length !== 4 || parts[0] !== \"HLM\") {\n return { valid: false, email: null };\n }\n const [, encodedEmail, nonce, signature] = parts;\n if (!encodedEmail || !nonce || !signature) {\n return { valid: false, email: null };\n }\n const message = Buffer.from(`HLM:${encodedEmail}:${nonce}`);\n const sig = Buffer.from(signature, \"base64url\");\n const ok = cryptoVerify(null, message, publicKey, sig);\n if (!ok) return { valid: false, email: null };\n const email = Buffer.from(encodedEmail, \"base64url\").toString(\"utf8\");\n return { valid: true, email };\n } catch {\n return { valid: false, email: null };\n }\n}\n\n// ── Input validation ──────────────────────────────────────────────────────────\n// key format: HLM--<8 hex>-<64 hex> — max ~200 chars in practice\nconst KEY_MAX = 300;\nconst MACHINE_MAX = 64;\nconst BODY_SIZE_MAX = 2048; // bytes\n\nfunction isSafeKey(k: unknown): k is string {\n // HLM..<8 hex nonce>.<86-char base64url Ed25519 sig>.\n return typeof k === \"string\" && k.length >= 10 && k.length <= KEY_MAX &&\n /^HLM\\.[A-Za-z0-9_-]+\\.[0-9a-f]{8}\\.[A-Za-z0-9_-]{86}$/.test(k);\n}\n\nfunction isSafeMachineId(m: unknown): m is string {\n return typeof m === \"string\" && m.length >= 4 && m.length <= MACHINE_MAX &&\n /^[0-9a-f]+$/.test(m);\n}\n\n// ── Handler ───────────────────────────────────────────────────────────────────\nexport default async function (req: Request): Promise {\n if (req.method !== \"POST\") {\n return new Response(\"Method Not Allowed\", { status: 405 });\n }\n\n // Reject oversized bodies before reading\n const contentLength = parseInt(req.headers.get(\"content-length\") ?? \"0\", 10);\n if (contentLength > BODY_SIZE_MAX) {\n return Response.json({ ok: false, reason: \"payload_too_large\" }, {\n status: 413,\n });\n }\n\n const limited = await rateLimit(req);\n if (limited) return limited;\n\n const publicPem = Deno.env.get(\"HELM_LICENSE_PUBLIC_KEY\") ?? \"\";\n if (!publicPem) {\n return Response.json({ ok: false, reason: \"server_misconfigured\" }, {\n status: 500,\n });\n }\n let publicKey: KeyObject;\n try {\n publicKey = createPublicKey(normalizePem(publicPem, \"PUBLIC KEY\"));\n } catch {\n return Response.json({ ok: false, reason: \"server_misconfigured\" }, {\n status: 500,\n });\n }\n\n let body: { key?: unknown; machineId?: unknown };\n try {\n const raw = await req.text();\n if (raw.length > BODY_SIZE_MAX) {\n return Response.json({ ok: false, reason: \"payload_too_large\" }, {\n status: 413,\n });\n }\n body = JSON.parse(raw);\n } catch {\n return Response.json({ ok: false, reason: \"bad_request\" }, { status: 400 });\n }\n\n const { key, machineId } = body;\n if (!isSafeKey(key)) {\n return Response.json({ ok: false, reason: \"invalid_key\" }, { status: 400 });\n }\n if (!isSafeMachineId(machineId)) {\n return Response.json({ ok: false, reason: \"invalid_machine\" }, {\n status: 400,\n });\n }\n\n const { valid, email } = verifyKey(key, publicKey);\n if (!valid) {\n return Response.json({ ok: false, reason: \"invalid_key\" }, { status: 403 });\n }\n\n const activationKey = \"helm_activation_\" +\n createHash(\"sha256\").update(key).digest(\"hex\").slice(0, 16);\n\n const existing: { machines: string[] } =\n (await blob.getJSON(activationKey)) ?? { machines: [] };\n\n if (existing.machines.includes(machineId)) {\n return Response.json({ ok: true, email });\n }\n\n if (existing.machines.length >= 2) {\n return Response.json({ ok: false, reason: \"limit_reached\" }, {\n status: 403,\n });\n }\n\n const recheck: { machines: string[] } = (await blob.getJSON(activationKey)) ??\n { machines: [] };\n if (!recheck.machines.includes(machineId) && recheck.machines.length >= 2) {\n return Response.json({ ok: false, reason: \"limit_reached\" }, {\n status: 403,\n });\n }\n\n const updated = {\n machines: Array.from(new Set([...recheck.machines, machineId])),\n email,\n };\n await blob.setJSON(activationKey, updated);\n\n return Response.json({ ok: true, email });\n}","createdAt",["D",1781085159795],"branchVersion","branchId","0bbcf6a2-5afb-11f1-9093-ee650bb23af1","id","0bbbf40a-5afb-11f1-9093-ee650bb23af1","helmActivate",["D",1780016970534],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Helm key ","imageUrl","6672ef94-066d-4947-9570-5b0ce7f352d5","pinnedFileId","pinPreview","pinMigrated","screenshotVersion","likeCount",0,"orgId","019e306a-94bf-733b-a503-3575488085e4","tursoName","0bbbf40a5afb11f19093ee650bb23af1","tursoHostname","0bbbf40a5afb11f19093ee650bb23af1-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789512044203],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_97":96,"_105":101},"org",{"_97":96,"_98":99,"_100":101,"_18":54,"_102":103,"_104":25},"branch",{"_13":86,"_32":87,"_42":41,"_88":43,"_89":-5,"_90":-5,"_91":-5,"_92":-5,"_93":-5,"_94":44,"_95":96},"isOwned",12,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","zyrxun","handle","displayName","Richard Xun","avatar","https://lh3.googleusercontent.com/a/ACg8ocLWG-UJ5cFmJNKhsROFvQZEkojxEI1DiAh7HQRUHjFCOK5FRw=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_42":43,"_32":44,"_37":154,"_46":-5,"_47":25,"_48":49,"_50":49,"_51":52,"_53":-5,"_18":54,"_55":-5,"_56":25,"_57":-5,"_58":-5,"_59":60,"_61":62,"_63":64,"_65":66,"_67":155,"_69":-5,"_70":71,"_72":71,"_73":74,"_75":74,"_76":74,"_77":71,"_78":71,"_79":156,"_81":157,"_83":158,"_85":25},"tree",[149],"files",[149],"counts",{"_137":60,"_138":139,"_140":60,"_141":142,"_143":144},"contents",[129],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles",true,"grants","orgs","customDomains",{},{"_42":130,"_32":28,"_30":31,"_131":-5,"_40":41,"_39":14,"_132":25,"_37":133,"_13":134,"_33":34,"_35":36,"_24":25,"_135":-5,"_27":136},"a7c3054c-341a-4717-92ab-77d6656cc51c","parentId","latest",["D",1781085159795],10,"label",[28],"pulls","branches",1,"forks","envVars",{"_145":147,"_148":60},"connections",{"_145":60,"_146":60},"count","unfilledCount",2,"emptyCount",{"_42":130,"_32":28,"_30":31,"_131":-5,"_40":41,"_39":14,"_132":25,"_37":150,"_13":134,"_33":34,"_35":36,"_24":25,"_135":-5,"_151":152,"_27":153},["D",1781085159795],"children",[],[28],["D",1780016970534],["D",1789512044203],{"_97":96,"_105":101},{"_97":96,"_98":99,"_100":101,"_18":54,"_102":103,"_104":25},{"_13":86,"_32":87,"_42":41,"_88":43,"_89":-5,"_90":-5,"_91":-5,"_92":-5,"_93":-5,"_94":44,"_95":96},"ctx",{"_79":-5,"_126":192,"_193":194,"_195":196,"_197":25,"_198":25,"_199":25,"_200":124,"_201":-5,"_202":-7,"_203":-7,"_204":60,"_205":25,"_206":25,"_207":-5,"_208":25,"_209":25,"_210":25,"_211":-5},"ENV",{"_163":164,"_165":166,"_167":87,"_168":169,"_170":171,"_172":173,"_174":175,"_176":177,"_178":179,"_180":181,"_182":183,"_184":185,"_186":187,"_188":189,"_190":191},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","811aa22498c9b0b5a47e8d778de579cdb990f332","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

Diff · v11