Build Core Utils

kernel/bin/login

@@ -87,6 +87,121 @@ function bareOsEmitRaw(ctx, chunk) {
   return false
 }
 
+function loginDecodeChunk(chunk) {
+  if (typeof chunk === 'string') return chunk
+  if (chunk instanceof Uint8Array) return new TextDecoder().decode(chunk)
+  if (
+    typeof Buffer !== 'undefined' &&
+    typeof Buffer.isBuffer === 'function' &&
+    Buffer.isBuffer(chunk)
+  ) {
+    return chunk.toString('utf8')
+  }
+  return String(chunk)
+}
+
+async function loginReadMaskedLine(ctx, prompt) {
+  const stdin = ctx.stdin
+  const stdout = ctx.stdout || globalThis.process?.stdout
+  if (!stdin || !stdout || typeof stdin.on !== 'function' || typeof stdout.write !== 'function') {
+    if (typeof ctx.readLine === 'function') return String((await ctx.readLine(prompt)) || '')
+    return ''
+  }
+  stdout.write(prompt)
+  const ttyIn = stdin
+  if (!ttyIn.isTTY || typeof ttyIn.setRawMode !== 'function') {
+    return await new Promise((resolve) => {
+      let acc = ''
+      function onData(chunk) {
+        const s = loginDecodeChunk(chunk)
+        acc += s
+        const nl = acc.indexOf('\n')
+        if (nl >= 0) {
+          cleanup()
+          resolve(acc.slice(0, nl).replace(/\r$/, ''))
+        }
+      }
+      function onEnd() {
+        cleanup()
+        resolve(acc.replace(/\r$/, ''))
+      }
+      function cleanup() {
+        stdin.removeListener('data', onData)
+        stdin.removeListener('end', onEnd)
+        stdin.removeListener('error', onEnd)
+      }
+      stdin.on('data', onData)
+      stdin.once('end', onEnd)
+      stdin.once('error', onEnd)
+      if (typeof stdin.resume === 'function') stdin.resume()
+    })
+  }
+  return await new Promise((resolve, reject) => {
+    const chars = []
+    let done = false
+    function finish(ok, err) {
+      if (done) return
+      done = true
+      cleanup()
+      stdout.write('\n')
+      if (ok) resolve(chars.join(''))
+      else reject(err || new Error('masked_input_failed'))
+    }
+    function cleanup() {
+      stdin.removeListener('data', onData)
+      stdin.removeListener('end', onEnd)
+      stdin.removeListener('error', onErr)
+      try {
+        ttyIn.setRawMode(false)
+      } catch {
+        /* ignore */
+      }
+    }
+    function onEnd() {
+      finish(true)
+    }
+    function onErr(e) {
+      finish(false, e instanceof Error ? e : new Error(String(e)))
+    }
+    function onData(chunk) {
+      if (done) return
+      const s = loginDecodeChunk(chunk)
+      for (const ch of s) {
+        const code = ch.charCodeAt(0)
+        if (ch === '\r' || ch === '\n') {
+          finish(true)
+          return
+        }
+        if (ch === '\u0003') {
+          finish(false, new Error('interrupted'))
+          return
+        }
+        if (ch === '\u007f' || ch === '\b') {
+          if (chars.length) {
+            chars.pop()
+            stdout.write('\b \b')
+          }
+          continue
+        }
+        if (code >= 32 && code !== 127) {
+          chars.push(ch)
+          stdout.write('*')
+        }
+      }
+    }
+    try {
+      ttyIn.setRawMode(true)
+    } catch {
+      finish(true)
+      return
+    }
+    stdin.on('data', onData)
+    stdin.once('end', onEnd)
+    stdin.once('error', onErr)
+    if (typeof stdin.resume === 'function') stdin.resume()
+  })
+}
+
 async function run(ctx, argv) {
   const rest = argv.slice(1)
   let createNew = false
@@ -94,9 +209,11 @@ async function run(ctx, argv) {
     createNew = true
     rest.shift()
   }
-  const passphrase = rest.join(' ')
+  const passphrase = rest.length
+    ? rest.join(' ')
+    : await loginReadMaskedLine(ctx, createNew ? 'New passphrase: ' : 'Passphrase: ')
   if (!passphrase) {
-    ctx.console.error('usage: login [--new] <passphrase>')
+    ctx.console.error('usage: login [--new] [passphrase]')
     return
   }
   const reg = ctx.applyRegister