251 lines
7.9 KiB
Go
251 lines
7.9 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package core
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"os"
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"strings"
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"sync"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/internal/ethapi"
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"github.com/ethereum/go-ethereum/log"
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"golang.org/x/crypto/ssh/terminal"
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)
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type CommandlineUI struct {
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in *bufio.Reader
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mu sync.Mutex
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}
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func NewCommandlineUI() *CommandlineUI {
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return &CommandlineUI{in: bufio.NewReader(os.Stdin)}
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}
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func (ui *CommandlineUI) RegisterUIServer(api *UIServerAPI) {
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// noop
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}
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// readString reads a single line from stdin, trimming if from spaces, enforcing
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// non-emptyness.
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func (ui *CommandlineUI) readString() string {
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for {
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fmt.Printf("> ")
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text, err := ui.in.ReadString('\n')
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if err != nil {
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log.Crit("Failed to read user input", "err", err)
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}
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if text = strings.TrimSpace(text); text != "" {
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return text
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}
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}
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}
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// readPassword reads a single line from stdin, trimming it from the trailing new
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// line and returns it. The input will not be echoed.
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func (ui *CommandlineUI) readPassword() string {
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fmt.Printf("Enter password to approve:\n")
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fmt.Printf("> ")
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text, err := terminal.ReadPassword(int(os.Stdin.Fd()))
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if err != nil {
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log.Crit("Failed to read password", "err", err)
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}
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fmt.Println()
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fmt.Println("-----------------------")
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return string(text)
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}
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// readPassword reads a single line from stdin, trimming it from the trailing new
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// line and returns it. The input will not be echoed.
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func (ui *CommandlineUI) readPasswordText(inputstring string) string {
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fmt.Printf("Enter %s:\n", inputstring)
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fmt.Printf("> ")
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text, err := terminal.ReadPassword(int(os.Stdin.Fd()))
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if err != nil {
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log.Crit("Failed to read password", "err", err)
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}
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fmt.Println("-----------------------")
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return string(text)
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}
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func (ui *CommandlineUI) OnInputRequired(info UserInputRequest) (UserInputResponse, error) {
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fmt.Printf("## %s\n\n%s\n", info.Title, info.Prompt)
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if info.IsPassword {
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fmt.Printf("> ")
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text, err := terminal.ReadPassword(int(os.Stdin.Fd()))
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if err != nil {
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log.Error("Failed to read password", "err", err)
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}
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fmt.Println("-----------------------")
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return UserInputResponse{string(text)}, err
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}
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text := ui.readString()
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fmt.Println("-----------------------")
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return UserInputResponse{text}, nil
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}
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// confirm returns true if user enters 'Yes', otherwise false
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func (ui *CommandlineUI) confirm() bool {
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fmt.Printf("Approve? [y/N]:\n")
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if ui.readString() == "y" {
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return true
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}
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fmt.Println("-----------------------")
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return false
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}
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func showMetadata(metadata Metadata) {
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fmt.Printf("Request context:\n\t%v -> %v -> %v\n", metadata.Remote, metadata.Scheme, metadata.Local)
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fmt.Printf("\nAdditional HTTP header data, provided by the external caller:\n")
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fmt.Printf("\tUser-Agent: %v\n\tOrigin: %v\n", metadata.UserAgent, metadata.Origin)
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}
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// ApproveTx prompt the user for confirmation to request to sign Transaction
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func (ui *CommandlineUI) ApproveTx(request *SignTxRequest) (SignTxResponse, error) {
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ui.mu.Lock()
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defer ui.mu.Unlock()
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weival := request.Transaction.Value.ToInt()
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fmt.Printf("--------- Transaction request-------------\n")
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if to := request.Transaction.To; to != nil {
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fmt.Printf("to: %v\n", to.Original())
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if !to.ValidChecksum() {
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fmt.Printf("\nWARNING: Invalid checksum on to-address!\n\n")
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}
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} else {
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fmt.Printf("to: <contact creation>\n")
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}
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fmt.Printf("from: %v\n", request.Transaction.From.String())
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fmt.Printf("value: %v wei\n", weival)
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fmt.Printf("gas: %v (%v)\n", request.Transaction.Gas, uint64(request.Transaction.Gas))
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fmt.Printf("gasprice: %v wei\n", request.Transaction.GasPrice.ToInt())
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fmt.Printf("nonce: %v (%v)\n", request.Transaction.Nonce, uint64(request.Transaction.Nonce))
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if request.Transaction.Data != nil {
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d := *request.Transaction.Data
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if len(d) > 0 {
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fmt.Printf("data: %v\n", hexutil.Encode(d))
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}
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}
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if request.Callinfo != nil {
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fmt.Printf("\nTransaction validation:\n")
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for _, m := range request.Callinfo {
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fmt.Printf(" * %s : %s\n", m.Typ, m.Message)
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}
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fmt.Println()
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}
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fmt.Printf("\n")
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showMetadata(request.Meta)
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fmt.Printf("-------------------------------------------\n")
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if !ui.confirm() {
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return SignTxResponse{request.Transaction, false}, nil
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}
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return SignTxResponse{request.Transaction, true}, nil
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}
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// ApproveSignData prompt the user for confirmation to request to sign data
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func (ui *CommandlineUI) ApproveSignData(request *SignDataRequest) (SignDataResponse, error) {
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ui.mu.Lock()
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defer ui.mu.Unlock()
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fmt.Printf("-------- Sign data request--------------\n")
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fmt.Printf("Account: %s\n", request.Address.String())
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fmt.Printf("messages:\n")
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for _, nvt := range request.Messages {
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fmt.Printf("\u00a0\u00a0%v\n", strings.TrimSpace(nvt.Pprint(1)))
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}
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fmt.Printf("raw data: \n%q\n", request.Rawdata)
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fmt.Printf("data hash: %v\n", request.Hash)
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fmt.Printf("-------------------------------------------\n")
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showMetadata(request.Meta)
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if !ui.confirm() {
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return SignDataResponse{false}, nil
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}
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return SignDataResponse{true}, nil
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}
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// ApproveListing prompt the user for confirmation to list accounts
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// the list of accounts to list can be modified by the UI
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func (ui *CommandlineUI) ApproveListing(request *ListRequest) (ListResponse, error) {
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ui.mu.Lock()
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defer ui.mu.Unlock()
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fmt.Printf("-------- List Account request--------------\n")
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fmt.Printf("A request has been made to list all accounts. \n")
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fmt.Printf("You can select which accounts the caller can see\n")
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for _, account := range request.Accounts {
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fmt.Printf(" [x] %v\n", account.Address.Hex())
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fmt.Printf(" URL: %v\n", account.URL)
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}
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fmt.Printf("-------------------------------------------\n")
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showMetadata(request.Meta)
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if !ui.confirm() {
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return ListResponse{nil}, nil
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}
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return ListResponse{request.Accounts}, nil
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}
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// ApproveNewAccount prompt the user for confirmation to create new Account, and reveal to caller
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func (ui *CommandlineUI) ApproveNewAccount(request *NewAccountRequest) (NewAccountResponse, error) {
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ui.mu.Lock()
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defer ui.mu.Unlock()
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fmt.Printf("-------- New Account request--------------\n\n")
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fmt.Printf("A request has been made to create a new account. \n")
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fmt.Printf("Approving this operation means that a new account is created,\n")
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fmt.Printf("and the address is returned to the external caller\n\n")
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showMetadata(request.Meta)
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if !ui.confirm() {
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return NewAccountResponse{false}, nil
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}
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return NewAccountResponse{true}, nil
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}
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// ShowError displays error message to user
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func (ui *CommandlineUI) ShowError(message string) {
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fmt.Printf("## Error \n%s\n", message)
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fmt.Printf("-------------------------------------------\n")
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}
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// ShowInfo displays info message to user
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func (ui *CommandlineUI) ShowInfo(message string) {
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fmt.Printf("## Info \n%s\n", message)
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}
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func (ui *CommandlineUI) OnApprovedTx(tx ethapi.SignTransactionResult) {
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fmt.Printf("Transaction signed:\n ")
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if jsn, err := json.MarshalIndent(tx.Tx, " ", " "); err != nil {
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fmt.Printf("WARN: marshalling error %v\n", err)
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} else {
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fmt.Println(string(jsn))
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}
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}
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func (ui *CommandlineUI) OnSignerStartup(info StartupInfo) {
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fmt.Printf("------- Signer info -------\n")
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for k, v := range info.Info {
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fmt.Printf("* %v : %v\n", k, v)
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}
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}
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