go-ethereum/signer/rules/rules_test.go

631 lines
17 KiB
Go

// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
//
package rules
import (
"fmt"
"math/big"
"strings"
"testing"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/internal/ethapi"
"github.com/ethereum/go-ethereum/signer/core"
"github.com/ethereum/go-ethereum/signer/storage"
)
const JS = `
/**
This is an example implementation of a Javascript rule file.
When the signer receives a request over the external API, the corresponding method is evaluated.
Three things can happen:
1. The method returns "Approve". This means the operation is permitted.
2. The method returns "Reject". This means the operation is rejected.
3. Anything else; other return values [*], method not implemented or exception occurred during processing. This means
that the operation will continue to manual processing, via the regular UI method chosen by the user.
[*] Note: Future version of the ruleset may use more complex json-based returnvalues, making it possible to not
only respond Approve/Reject/Manual, but also modify responses. For example, choose to list only one, but not all
accounts in a list-request. The points above will continue to hold for non-json based responses ("Approve"/"Reject").
**/
function ApproveListing(request){
console.log("In js approve listing");
console.log(request.accounts[3].Address)
console.log(request.meta.Remote)
return "Approve"
}
function ApproveTx(request){
console.log("test");
console.log("from");
return "Reject";
}
function test(thing){
console.log(thing.String())
}
`
func mixAddr(a string) (*common.MixedcaseAddress, error) {
return common.NewMixedcaseAddressFromString(a)
}
type alwaysDenyUI struct{}
func (alwaysDenyUI) OnInputRequired(info core.UserInputRequest) (core.UserInputResponse, error) {
return core.UserInputResponse{}, nil
}
func (alwaysDenyUI) RegisterUIServer(api *core.UIServerAPI) {
}
func (alwaysDenyUI) OnSignerStartup(info core.StartupInfo) {
}
func (alwaysDenyUI) ApproveTx(request *core.SignTxRequest) (core.SignTxResponse, error) {
return core.SignTxResponse{Transaction: request.Transaction, Approved: false}, nil
}
func (alwaysDenyUI) ApproveSignData(request *core.SignDataRequest) (core.SignDataResponse, error) {
return core.SignDataResponse{Approved: false}, nil
}
func (alwaysDenyUI) ApproveListing(request *core.ListRequest) (core.ListResponse, error) {
return core.ListResponse{Accounts: nil}, nil
}
func (alwaysDenyUI) ApproveNewAccount(request *core.NewAccountRequest) (core.NewAccountResponse, error) {
return core.NewAccountResponse{Approved: false}, nil
}
func (alwaysDenyUI) ShowError(message string) {
panic("implement me")
}
func (alwaysDenyUI) ShowInfo(message string) {
panic("implement me")
}
func (alwaysDenyUI) OnApprovedTx(tx ethapi.SignTransactionResult) {
panic("implement me")
}
func initRuleEngine(js string) (*rulesetUI, error) {
r, err := NewRuleEvaluator(&alwaysDenyUI{}, storage.NewEphemeralStorage())
if err != nil {
return nil, fmt.Errorf("failed to create js engine: %v", err)
}
if err = r.Init(js); err != nil {
return nil, fmt.Errorf("failed to load bootstrap js: %v", err)
}
return r, nil
}
func TestListRequest(t *testing.T) {
accs := make([]accounts.Account, 5)
for i := range accs {
addr := fmt.Sprintf("000000000000000000000000000000000000000%x", i)
acc := accounts.Account{
Address: common.BytesToAddress(common.Hex2Bytes(addr)),
URL: accounts.URL{Scheme: "test", Path: fmt.Sprintf("acc-%d", i)},
}
accs[i] = acc
}
js := `function ApproveListing(){ return "Approve" }`
r, err := initRuleEngine(js)
if err != nil {
t.Errorf("Couldn't create evaluator %v", err)
return
}
resp, _ := r.ApproveListing(&core.ListRequest{
Accounts: accs,
Meta: core.Metadata{Remote: "remoteip", Local: "localip", Scheme: "inproc"},
})
if len(resp.Accounts) != len(accs) {
t.Errorf("Expected check to resolve to 'Approve'")
}
}
func TestSignTxRequest(t *testing.T) {
js := `
function ApproveTx(r){
console.log("transaction.from", r.transaction.from);
console.log("transaction.to", r.transaction.to);
console.log("transaction.value", r.transaction.value);
console.log("transaction.nonce", r.transaction.nonce);
if(r.transaction.from.toLowerCase()=="0x0000000000000000000000000000000000001337"){ return "Approve"}
if(r.transaction.from.toLowerCase()=="0x000000000000000000000000000000000000dead"){ return "Reject"}
}`
r, err := initRuleEngine(js)
if err != nil {
t.Errorf("Couldn't create evaluator %v", err)
return
}
to, err := mixAddr("000000000000000000000000000000000000dead")
if err != nil {
t.Error(err)
return
}
from, err := mixAddr("0000000000000000000000000000000000001337")
if err != nil {
t.Error(err)
return
}
fmt.Printf("to %v", to.Address().String())
resp, err := r.ApproveTx(&core.SignTxRequest{
Transaction: core.SendTxArgs{
From: *from,
To: to},
Callinfo: nil,
Meta: core.Metadata{Remote: "remoteip", Local: "localip", Scheme: "inproc"},
})
if err != nil {
t.Errorf("Unexpected error %v", err)
}
if !resp.Approved {
t.Errorf("Expected check to resolve to 'Approve'")
}
}
type dummyUI struct {
calls []string
}
func (d *dummyUI) RegisterUIServer(api *core.UIServerAPI) {
panic("implement me")
}
func (d *dummyUI) OnInputRequired(info core.UserInputRequest) (core.UserInputResponse, error) {
d.calls = append(d.calls, "OnInputRequired")
return core.UserInputResponse{}, nil
}
func (d *dummyUI) ApproveTx(request *core.SignTxRequest) (core.SignTxResponse, error) {
d.calls = append(d.calls, "ApproveTx")
return core.SignTxResponse{}, core.ErrRequestDenied
}
func (d *dummyUI) ApproveSignData(request *core.SignDataRequest) (core.SignDataResponse, error) {
d.calls = append(d.calls, "ApproveSignData")
return core.SignDataResponse{}, core.ErrRequestDenied
}
func (d *dummyUI) ApproveListing(request *core.ListRequest) (core.ListResponse, error) {
d.calls = append(d.calls, "ApproveListing")
return core.ListResponse{}, core.ErrRequestDenied
}
func (d *dummyUI) ApproveNewAccount(request *core.NewAccountRequest) (core.NewAccountResponse, error) {
d.calls = append(d.calls, "ApproveNewAccount")
return core.NewAccountResponse{}, core.ErrRequestDenied
}
func (d *dummyUI) ShowError(message string) {
d.calls = append(d.calls, "ShowError")
}
func (d *dummyUI) ShowInfo(message string) {
d.calls = append(d.calls, "ShowInfo")
}
func (d *dummyUI) OnApprovedTx(tx ethapi.SignTransactionResult) {
d.calls = append(d.calls, "OnApprovedTx")
}
func (d *dummyUI) OnSignerStartup(info core.StartupInfo) {
}
//TestForwarding tests that the rule-engine correctly dispatches requests to the next caller
func TestForwarding(t *testing.T) {
js := ""
ui := &dummyUI{make([]string, 0)}
jsBackend := storage.NewEphemeralStorage()
r, err := NewRuleEvaluator(ui, jsBackend)
if err != nil {
t.Fatalf("Failed to create js engine: %v", err)
}
if err = r.Init(js); err != nil {
t.Fatalf("Failed to load bootstrap js: %v", err)
}
r.ApproveSignData(nil)
r.ApproveTx(nil)
r.ApproveNewAccount(nil)
r.ApproveListing(nil)
r.ShowError("test")
r.ShowInfo("test")
//This one is not forwarded
r.OnApprovedTx(ethapi.SignTransactionResult{})
expCalls := 6
if len(ui.calls) != expCalls {
t.Errorf("Expected %d forwarded calls, got %d: %s", expCalls, len(ui.calls), strings.Join(ui.calls, ","))
}
}
func TestMissingFunc(t *testing.T) {
r, err := initRuleEngine(JS)
if err != nil {
t.Errorf("Couldn't create evaluator %v", err)
return
}
_, err = r.execute("MissingMethod", "test")
if err == nil {
t.Error("Expected error")
}
approved, err := r.checkApproval("MissingMethod", nil, nil)
if err == nil {
t.Errorf("Expected missing method to yield error'")
}
if approved {
t.Errorf("Expected missing method to cause non-approval")
}
fmt.Printf("Err %v", err)
}
func TestStorage(t *testing.T) {
js := `
function testStorage(){
storage.Put("mykey", "myvalue")
a = storage.Get("mykey")
storage.Put("mykey", ["a", "list"]) // Should result in "a,list"
a += storage.Get("mykey")
storage.Put("mykey", {"an": "object"}) // Should result in "[object Object]"
a += storage.Get("mykey")
storage.Put("mykey", JSON.stringify({"an": "object"})) // Should result in '{"an":"object"}'
a += storage.Get("mykey")
a += storage.Get("missingkey") //Missing keys should result in empty string
storage.Put("","missing key==noop") // Can't store with 0-length key
a += storage.Get("") // Should result in ''
var b = new BigNumber(2)
var c = new BigNumber(16)//"0xf0",16)
var d = b.plus(c)
console.log(d)
return a
}
`
r, err := initRuleEngine(js)
if err != nil {
t.Errorf("Couldn't create evaluator %v", err)
return
}
v, err := r.execute("testStorage", nil)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
retval, err := v.ToString()
if err != nil {
t.Errorf("Unexpected error %v", err)
}
exp := `myvaluea,list[object Object]{"an":"object"}`
if retval != exp {
t.Errorf("Unexpected data, expected '%v', got '%v'", exp, retval)
}
fmt.Printf("Err %v", err)
}
const ExampleTxWindow = `
function big(str){
if(str.slice(0,2) == "0x"){ return new BigNumber(str.slice(2),16)}
return new BigNumber(str)
}
// Time window: 1 week
var window = 1000* 3600*24*7;
// Limit : 1 ether
var limit = new BigNumber("1e18");
function isLimitOk(transaction){
var value = big(transaction.value)
// Start of our window function
var windowstart = new Date().getTime() - window;
var txs = [];
var stored = storage.Get('txs');
if(stored != ""){
txs = JSON.parse(stored)
}
// First, remove all that have passed out of the time-window
var newtxs = txs.filter(function(tx){return tx.tstamp > windowstart});
console.log(txs, newtxs.length);
// Secondly, aggregate the current sum
sum = new BigNumber(0)
sum = newtxs.reduce(function(agg, tx){ return big(tx.value).plus(agg)}, sum);
console.log("ApproveTx > Sum so far", sum);
console.log("ApproveTx > Requested", value.toNumber());
// Would we exceed weekly limit ?
return sum.plus(value).lt(limit)
}
function ApproveTx(r){
console.log(r)
console.log(typeof(r))
if (isLimitOk(r.transaction)){
return "Approve"
}
return "Nope"
}
/**
* OnApprovedTx(str) is called when a transaction has been approved and signed. The parameter
* 'response_str' contains the return value that will be sent to the external caller.
* The return value from this method is ignore - the reason for having this callback is to allow the
* ruleset to keep track of approved transactions.
*
* When implementing rate-limited rules, this callback should be used.
* If a rule responds with neither 'Approve' nor 'Reject' - the tx goes to manual processing. If the user
* then accepts the transaction, this method will be called.
*
* TLDR; Use this method to keep track of signed transactions, instead of using the data in ApproveTx.
*/
function OnApprovedTx(resp){
var value = big(resp.tx.value)
var txs = []
// Load stored transactions
var stored = storage.Get('txs');
if(stored != ""){
txs = JSON.parse(stored)
}
// Add this to the storage
txs.push({tstamp: new Date().getTime(), value: value});
storage.Put("txs", JSON.stringify(txs));
}
`
func dummyTx(value hexutil.Big) *core.SignTxRequest {
to, _ := mixAddr("000000000000000000000000000000000000dead")
from, _ := mixAddr("000000000000000000000000000000000000dead")
n := hexutil.Uint64(3)
gas := hexutil.Uint64(21000)
gasPrice := hexutil.Big(*big.NewInt(2000000))
return &core.SignTxRequest{
Transaction: core.SendTxArgs{
From: *from,
To: to,
Value: value,
Nonce: n,
GasPrice: gasPrice,
Gas: gas,
},
Callinfo: []core.ValidationInfo{
{Typ: "Warning", Message: "All your base are bellong to us"},
},
Meta: core.Metadata{Remote: "remoteip", Local: "localip", Scheme: "inproc"},
}
}
func dummyTxWithV(value uint64) *core.SignTxRequest {
v := big.NewInt(0).SetUint64(value)
h := hexutil.Big(*v)
return dummyTx(h)
}
func dummySigned(value *big.Int) *types.Transaction {
to := common.HexToAddress("000000000000000000000000000000000000dead")
gas := uint64(21000)
gasPrice := big.NewInt(2000000)
data := make([]byte, 0)
return types.NewTransaction(3, to, value, gas, gasPrice, data)
}
func TestLimitWindow(t *testing.T) {
r, err := initRuleEngine(ExampleTxWindow)
if err != nil {
t.Errorf("Couldn't create evaluator %v", err)
return
}
// 0.3 ether: 429D069189E0000 wei
v := big.NewInt(0).SetBytes(common.Hex2Bytes("0429D069189E0000"))
h := hexutil.Big(*v)
// The first three should succeed
for i := 0; i < 3; i++ {
unsigned := dummyTx(h)
resp, err := r.ApproveTx(unsigned)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
if !resp.Approved {
t.Errorf("Expected check to resolve to 'Approve'")
}
// Create a dummy signed transaction
response := ethapi.SignTransactionResult{
Tx: dummySigned(v),
Raw: common.Hex2Bytes("deadbeef"),
}
r.OnApprovedTx(response)
}
// Fourth should fail
resp, _ := r.ApproveTx(dummyTx(h))
if resp.Approved {
t.Errorf("Expected check to resolve to 'Reject'")
}
}
// dontCallMe is used as a next-handler that does not want to be called - it invokes test failure
type dontCallMe struct {
t *testing.T
}
func (d *dontCallMe) OnInputRequired(info core.UserInputRequest) (core.UserInputResponse, error) {
d.t.Fatalf("Did not expect next-handler to be called")
return core.UserInputResponse{}, nil
}
func (d *dontCallMe) RegisterUIServer(api *core.UIServerAPI) {
}
func (d *dontCallMe) OnSignerStartup(info core.StartupInfo) {
}
func (d *dontCallMe) ApproveTx(request *core.SignTxRequest) (core.SignTxResponse, error) {
d.t.Fatalf("Did not expect next-handler to be called")
return core.SignTxResponse{}, core.ErrRequestDenied
}
func (d *dontCallMe) ApproveSignData(request *core.SignDataRequest) (core.SignDataResponse, error) {
d.t.Fatalf("Did not expect next-handler to be called")
return core.SignDataResponse{}, core.ErrRequestDenied
}
func (d *dontCallMe) ApproveListing(request *core.ListRequest) (core.ListResponse, error) {
d.t.Fatalf("Did not expect next-handler to be called")
return core.ListResponse{}, core.ErrRequestDenied
}
func (d *dontCallMe) ApproveNewAccount(request *core.NewAccountRequest) (core.NewAccountResponse, error) {
d.t.Fatalf("Did not expect next-handler to be called")
return core.NewAccountResponse{}, core.ErrRequestDenied
}
func (d *dontCallMe) ShowError(message string) {
d.t.Fatalf("Did not expect next-handler to be called")
}
func (d *dontCallMe) ShowInfo(message string) {
d.t.Fatalf("Did not expect next-handler to be called")
}
func (d *dontCallMe) OnApprovedTx(tx ethapi.SignTransactionResult) {
d.t.Fatalf("Did not expect next-handler to be called")
}
//TestContextIsCleared tests that the rule-engine does not retain variables over several requests.
// if it does, that would be bad since developers may rely on that to store data,
// instead of using the disk-based data storage
func TestContextIsCleared(t *testing.T) {
js := `
function ApproveTx(){
if (typeof foobar == 'undefined') {
foobar = "Approve"
}
console.log(foobar)
if (foobar == "Approve"){
foobar = "Reject"
}else{
foobar = "Approve"
}
return foobar
}
`
ui := &dontCallMe{t}
r, err := NewRuleEvaluator(ui, storage.NewEphemeralStorage())
if err != nil {
t.Fatalf("Failed to create js engine: %v", err)
}
if err = r.Init(js); err != nil {
t.Fatalf("Failed to load bootstrap js: %v", err)
}
tx := dummyTxWithV(0)
r1, _ := r.ApproveTx(tx)
r2, _ := r.ApproveTx(tx)
if r1.Approved != r2.Approved {
t.Errorf("Expected execution context to be cleared between executions")
}
}
func TestSignData(t *testing.T) {
js := `function ApproveListing(){
return "Approve"
}
function ApproveSignData(r){
if( r.address.toLowerCase() == "0x694267f14675d7e1b9494fd8d72fefe1755710fa")
{
if(r.message[0].value.indexOf("bazonk") >= 0){
return "Approve"
}
return "Reject"
}
// Otherwise goes to manual processing
}`
r, err := initRuleEngine(js)
if err != nil {
t.Errorf("Couldn't create evaluator %v", err)
return
}
message := "baz bazonk foo"
hash, rawdata := accounts.TextAndHash([]byte(message))
addr, _ := mixAddr("0x694267f14675d7e1b9494fd8d72fefe1755710fa")
fmt.Printf("address %v %v\n", addr.String(), addr.Original())
nvt := []*core.NameValueType{
{
Name: "message",
Typ: "text/plain",
Value: message,
},
}
resp, err := r.ApproveSignData(&core.SignDataRequest{
Address: *addr,
Message: nvt,
Hash: hash,
Meta: core.Metadata{Remote: "remoteip", Local: "localip", Scheme: "inproc"},
Rawdata: []byte(rawdata),
})
if err != nil {
t.Fatalf("Unexpected error %v", err)
}
if !resp.Approved {
t.Fatalf("Expected approved")
}
}