How to use rfc4648 - 10 common examples

emit(ai.props.output.context.api, 'loginStart', {
    username: stashTree.username
  })

  // Find the appropriate child:
  const child = searchTree(stashTree, stash => stash.appId === appId)
  if (child == null) {
    throw new Error(`Cannot find requested appId: "${appId}"`)
  }

  // The Airbitz mobile will sometimes send the pin2Key in base58
  // instead of base64 due to an unfortunate bug. Fix that:
  if (child.pin2Key != null && child.pin2Key.slice(-1) !== '=') {
    io.console.warn('Fixing base58 pin2Key')
    child.pin2Key = base64.stringify(base58.parse(child.pin2Key))
  }
  await saveStash(ai, stashTree)

  // This is almost guaranteed to blow up spectacularly:
  const loginKey = base64.parse(reply.loginKey)
  const loginTree = makeLoginTree(stashTree, loginKey, appId)
  const login = searchTree(loginTree, login => login.appId === appId)
  if (login == null) {
    throw new Error(`Cannot find requested appId: "${appId}"`)
  }
  const newLoginTree = await syncLogin(ai, loginTree, login)
  const account = await makeAccount(ai, appId, newLoginTree, 'edgeLogin', opts)
  emit(ai.props.output.context.api, 'login', account)
}

if (mnemonicBox != null && rootKeyBox != null) {
    const rootKey = decrypt(rootKeyBox, loginKey)
    const infoKey = hmacSha256(rootKey, utf8.parse('infoKey'))
    const keys = {
      mnemonic: utf8.stringify(decrypt(mnemonicBox, infoKey)),
      rootKey: base64.stringify(rootKey)
    }
    legacyKeys.push(makeKeyInfo('wallet:bitid', keys, rootKey))
  }

  // Account settings:
  if (stash.syncKeyBox != null) {
    const syncKey = decrypt(stash.syncKeyBox, loginKey)
    const type = makeAccountType(login.appId)
    const keys = {
      syncKey: base64.stringify(syncKey),
      dataKey: base64.stringify(loginKey)
    }
    legacyKeys.push(makeKeyInfo(type, keys, loginKey))
  }

  // Keys:
  const stashKeyBoxes = stash.keyBoxes != null ? stash.keyBoxes : []
  const keyInfos = stashKeyBoxes.map(box =>
    JSON.parse(utf8.stringify(decrypt(box, loginKey)))
  )

  login.keyInfos = mergeKeyInfos([...legacyKeys, ...keyInfos]).map(walletInfo =>
    fixWalletInfo(walletInfo)
  )

  // Recurse into children:

const rootKey = decrypt(rootKeyBox, loginKey)
    const infoKey = hmacSha256(rootKey, utf8.parse('infoKey'))
    const keys = {
      mnemonic: utf8.stringify(decrypt(mnemonicBox, infoKey)),
      rootKey: base64.stringify(rootKey)
    }
    legacyKeys.push(makeKeyInfo('wallet:bitid', keys, rootKey))
  }

  // Account settings:
  if (stash.syncKeyBox != null) {
    const syncKey = decrypt(stash.syncKeyBox, loginKey)
    const type = makeAccountType(login.appId)
    const keys = {
      syncKey: base64.stringify(syncKey),
      dataKey: base64.stringify(loginKey)
    }
    legacyKeys.push(makeKeyInfo(type, keys, loginKey))
  }

  // Keys:
  const stashKeyBoxes = stash.keyBoxes != null ? stash.keyBoxes : []
  const keyInfos = stashKeyBoxes.map(box =>
    JSON.parse(utf8.stringify(decrypt(box, loginKey)))
  )

  login.keyInfos = mergeKeyInfos([...legacyKeys, ...keyInfos]).map(walletInfo =>
    fixWalletInfo(walletInfo)
  )

  // Recurse into children:
  const stashChildren = stash.children != null ? stash.children : []

return authRequest(ai, 'GET', '/v2/lobby/' + lobbyId, {}).then(reply => {
    const lobbyRequest = reply.request

    // Verify the public key:
    const pubkey = base64.parse(lobbyRequest.publicKey)
    const checksum = sha256(sha256(pubkey))
    base58.parse(lobbyId).forEach((value, index) => {
      if (value !== checksum[index]) {
        throw new Error('Lobby ECDH integrity error')
      }
    })

    return lobbyRequest
  })
}

login.otpResetDate = stash.otpResetDate
  login.otpTimeout = stash.otpTimeout

  // Password:
  if (stash.userId != null) {
    login.userId = stash.userId
  } else if (stash.passwordAuthBox != null) {
    login.userId = login.loginId
  }
  if (stash.passwordAuthBox != null) {
    login.passwordAuth = decrypt(stash.passwordAuthBox, loginKey)
  }

  // PIN v2:
  if (stash.pin2Key != null) {
    login.pin2Key = base64.parse(stash.pin2Key)
  }
  if (stash.pin2TextBox != null) {
    login.pin = utf8.stringify(decrypt(stash.pin2TextBox, loginKey))
  }

  // Recovery v2:
  if (stash.recovery2Key != null) {
    login.recovery2Key = base64.parse(stash.recovery2Key)
  }

  const legacyKeys = []

  // BitID wallet:
  const { mnemonicBox, rootKeyBox } = stash
  if (mnemonicBox != null && rootKeyBox != null) {
    const rootKey = decrypt(rootKeyBox, loginKey)

}
  if (stash.passwordAuthBox != null) {
    login.passwordAuth = decrypt(stash.passwordAuthBox, loginKey)
  }

  // PIN v2:
  if (stash.pin2Key != null) {
    login.pin2Key = base64.parse(stash.pin2Key)
  }
  if (stash.pin2TextBox != null) {
    login.pin = utf8.stringify(decrypt(stash.pin2TextBox, loginKey))
  }

  // Recovery v2:
  if (stash.recovery2Key != null) {
    login.recovery2Key = base64.parse(stash.recovery2Key)
  }

  const legacyKeys = []

  // BitID wallet:
  const { mnemonicBox, rootKeyBox } = stash
  if (mnemonicBox != null && rootKeyBox != null) {
    const rootKey = decrypt(rootKeyBox, loginKey)
    const infoKey = hmacSha256(rootKey, utf8.parse('infoKey'))
    const keys = {
      mnemonic: utf8.stringify(decrypt(mnemonicBox, infoKey)),
      rootKey: base64.stringify(rootKey)
    }
    legacyKeys.push(makeKeyInfo('wallet:bitid', keys, rootKey))
  }

newWalletType: string
): EdgeWalletInfo {
  const { id, type, keys } = walletInfo
  if (!keys.dataKey || !keys.syncKey) {
    throw new Error(`Wallet ${id} is not a splittable type`)
  }

  const dataKey = base64.parse(keys.dataKey)
  const syncKey = base64.parse(keys.syncKey)
  const xorKey = xorData(
    hmacSha256(utf8.parse(type), dataKey),
    hmacSha256(utf8.parse(newWalletType), dataKey)
  )

  // Fix the id:
  const newWalletId = xorData(base64.parse(id), xorKey)
  const newSyncKey = xorData(syncKey, xorKey.subarray(0, syncKey.length))

  // Fix the keys:
  const networkName = type.replace(/wallet:/, '').replace('-', '')
  const newNetworkName = newWalletType.replace(/wallet:/, '').replace('-', '')
  const newKeys = {}
  for (const key of Object.keys(keys)) {
    if (key === networkName + 'Key') {
      newKeys[newNetworkName + 'Key'] = keys[key]
    } else {
      newKeys[key] = keys[key]
    }
  }

  return {
    id: base64.stringify(newWalletId),

export function calcSnrpForTarget(
  salt: Uint8Array,
  benchMs: number,
  targetMs: number
): JsonSnrp {
  const snrp = {
    salt_hex: base16.stringify(salt),
    n: 16384,
    r: 8,
    p: 1
  }

  if (benchMs === 0) {
    snrp.n = 131072
    snrp.r = 8
    snrp.p = 64
    return snrp
  }

  let timeUsed = benchMs // Estimated time in ms the current setting will take on current device

  //
  // Add additional r value first. This increases memory usage

createCurrencyWallet (accountId: string, type: string) {
          // Hack in basic Ethereum support for Augur:
          if (type === 'wallet:ethereum') {
            return state.accounts[accountId]
              .createWallet(type, {
                ethereumKey: base16.stringify(makeRandom(32))
              })
              .then(walletId => {
                const walletInfos = getWalletInfos(state, accountId)
                return { walletId, walletInfos }
              })
          }

          return state.accounts[accountId]
            .createCurrencyWallet(type, {})
            .then(currencyWallet => {
              const walletInfos = getWalletInfos(state, accountId)
              return { walletId: currencyWallet.id, walletInfos }
            })
        },

).then(ourChanges => {
    // If we have local changes, we need to bundle those:
    const request = {}
    if (ourChanges.length > 0) {
      request.changes = {}
      for (const change of ourChanges) {
        request.changes[change.name] = change.json
      }
    }
    const method = request.changes ? 'POST' : 'GET'

    // Calculate the URI:
    let path = '/api/v2/store/' + base16.stringify(syncKey).toLowerCase()
    if (status.lastHash != null) {
      path += '/' + status.lastHash
    }

    // Make the request:
    return syncRequest(io, log, method, path, request).then(reply => {
      const { changes = {}, hash } = reply

      // Save the incoming changes into our `data` folder:
      return saveChanges(dataDisklet, changes)
        .then(
          // Delete any changed keys (since the upload is done):
          () => Promise.all(ourChanges.map(change => change.file.delete()))
        )
        .then(() => {
          // Update the repo status: