cmd/signer: minor changes

cmd/signer/README.md

@@ -11,13 +11,23 @@ synchronised with the chain or a particular Ethereum node that has no build in,
   
 In its current form the signer is very limited and designed to work with Mist. It hasn't got a connection to an
 Ethereum node. This restriction imposed many limitations such as the lack of ability to keep track of nonces, balances
-or fetching additional information that can help the user to make a decision to sign a transaction or data. Currently
-the signer only supports password protected accounts. Support for hardware tokens such as Trezor and Legder is planned.
+or fetching additional information that can help the user to make a decision to sign a transaction or data. 
 
 ## Command line flags
 The signer accepts the following command line options:
-- keystore, the directory where the password protected keystore stores keyfiles. The default directory is within geth's datadir. It is OS dependand, use `signer -h` to see where the location is on your system.
-- chainid, the chain identifier. Default value is the Ethereum mainnet. See of a list of chain identifiers that are used https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md.
+```
+   --chainid value    chain identifier (default: 1)
+   --loglevel value   log level to emit to the screen (default: 4)
+   --keystore value   Directory for the keystore (default: "/home/martin/.ethereum/keystore")
+   --networkid value  Network identifier (integer, 1=Frontier, 2=Morden (disused), 3=Ropsten, 4=Rinkeby) (default: 1)
+   --lightkdf         Reduce key-derivation RAM & CPU usage at some expense of KDF strength
+   --nousb            Disables monitoring for and managing USB hardware wallets
+   --rpcaddr value    HTTP-RPC server listening interface (default: "localhost")
+   --rpcport value    HTTP-RPC server listening port (default: 8550)
+   --4bytedb value    File containing 4byte-identifiers (default: "./4byte.json")
+   --help, -h         show help
+```
+
 
 Example:
 ```
@@ -25,7 +35,8 @@ signer -keystore /my/keystore -chainid 4
 ```
 
 ## Communicating
-The signer listens on stdin for incoming requests and sends responses on stdout. Messages are expected to follow the
+
+The signer listens to HTTP requests on `rpcaddr`:`rpcport`. The messages are expected to be JSON
 [jsonrpc 2.0 standard](http://www.jsonrpc.org/specification).
 
 Some of these call can require user interaction. Clients must be aware that responses may be deplayed significanlty or
@@ -50,7 +61,8 @@ The client is responsible for creating a backup of the keystore. If the keystore
 lost accounts.
 
 #### Arguments
-  - passphrase [string]: passphrase that is used to protect the private key that is stored within the keystore
+
+None
 
 #### Result
   - address [string]: account address that is derived from the generated key
@@ -83,7 +95,8 @@ lost accounts.
    List all accounts that this signer currently manages
 
 #### Arguments
-  none
+
+None
 
 #### Result
   - array with account records:
@@ -120,11 +133,10 @@ lost accounts.
 ### account_signTransaction
 
 #### Sign transactions
-   Signs a transactions and respons with the signed transaction in RLP encoded form.
+   Signs a transactions and responds with the signed transaction in RLP encoded form.
 
 #### Arguments
   - from [address]: account to send the transaction from
-  - passphrase [string]: passphrase to unlock the from account
   - Transaction object:
      - transaction.to [address]: receiver account
      - gas [number]: maximum amount of gas to burn
@@ -144,7 +156,6 @@ lost accounts.
   "method": "account_signTransaction",
   "params": [
     "0x1923f626bb8dc025849e00f99c25fe2b2f7fb0db",
-    "my password",
     {
       "gas": "0x55555",
       "gasPrice": "0x1234",
@@ -170,7 +181,6 @@ lost accounts.
 
 #### Arguments
   - account [address]: account to sign with
-  - passphrase [string]: passphrase to unlock the account
   - data [data]: data to sign
 
 #### Result
@@ -184,7 +194,6 @@ lost accounts.
   "method": "account_sign",
   "params": [
     "0x1923f626bb8dc025849e00f99c25fe2b2f7fb0db",
-    "my password",
     "0xaabbccdd"
   ]
 }
@@ -236,8 +245,6 @@ lost accounts.
    
 #### Arguments
   - account [object]: key in [web3 keystore format](https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition) (retrieved with account_export) 
-  - passphrase [string]: password to decrypt the given account
-  - newPassphrase [string]: password to encrypt the imported key in the keystore with 
 
 #### Result
   - imported key [object]:
@@ -273,8 +280,6 @@ lost accounts.
       "id": "09bccb61-b8d3-4e93-bf4f-205a8194f0b9",
       "version": 3
     },
-    "my password",
-    "my password"
   ]
 }
 {

cmd/signer/api.go

@@ -41,7 +41,6 @@ type SignerAPI struct {
 	am      *accounts.Manager
 	ui      SignerUI
 	abidb   abiDb
-	audit   *auditlogger
 }
 
 // Metadata about the request
@@ -173,7 +172,7 @@ func (ui *HeadlessUI) ShowInfo(message string) {
 // key that is generated when a new account is created.
 // noUSB disables USB support that is required to support hardware devices such as
 // ledger and trezor.
-func NewSignerAPI(chainID int64, ksLocation string, noUSB bool, ui SignerUI, abidb *abiDb, auditlog string) *SignerAPI {
+func NewSignerAPI(chainID int64, ksLocation string, noUSB bool, ui SignerUI, abidb *abiDb) *SignerAPI {
 	var backends []accounts.Backend
 
 	// support password based accounts
@@ -197,11 +196,7 @@ func NewSignerAPI(chainID int64, ksLocation string, noUSB bool, ui SignerUI, abi
 			log.Debug("Trezor support enabled")
 		}
 	}
-	var al *auditlogger
-	if auditlog != ""{
-		al = &auditlogger{auditlog}
-	}
-	return &SignerAPI{big.NewInt(chainID), accounts.NewManager(backends...), ui, *abidb, al}
+	return &SignerAPI{big.NewInt(chainID), accounts.NewManager(backends...), ui, *abidb}
 }
 
 func metaData(ctx context.Context) Metadata {
@@ -300,6 +295,7 @@ func (api *SignerAPI) SignTransaction(ctx context.Context, from common.Address,
 		}
 		signedTx, err := wallet.SignTxWithPassphrase(acc, result.pw, tx, api.chainID)
 		if err != nil {
+			api.ui.ShowError(err.Error())
 			return nil, err
 		}
 		return rlp.EncodeToBytes(signedTx)
@@ -337,6 +333,7 @@ func (api *SignerAPI) Sign(ctx context.Context, addr common.Address, data hexuti
 		// Assemble sign the data with the wallet
 		signature, err := wallet.SignHashWithPassphrase(account, res.pw, sighash)
 		if err != nil {
+			api.ui.ShowError(err.Error())
 			return nil, err
 		}
 		signature[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper
@@ -414,7 +411,8 @@ func (api *SignerAPI) Export(ctx context.Context, addr common.Address) (json.Raw
 // Imports tries to import the given keyJSON in the local keystore. The keyJSON data is expected to be
 // in web3 keystore format. It will decrypt the keyJSON with the given passphrase and on successful
 // decryption it will encrypt the key with the given newPassphrase and store it in the keystore.
-func (api *SignerAPI) Import(ctx context.Context, keyJSON json.RawMessage) (Account, error) {
+func (api *SignerAPI) Import(ctx context.Context, string, keyJSON json.RawMessage) (Account, error) {
+
 	be := api.am.Backends(keystore.KeyStoreType)
 
 	if len(be) == 0 {
@@ -424,10 +422,12 @@ func (api *SignerAPI) Import(ctx context.Context, keyJSON json.RawMessage) (Acco
 	ch := make(chan ImportResponse, 1)
 
 	api.ui.ApproveImport(&ImportRequest{}, metaData(ctx), ch)
+
 	if resp := <-ch; resp.approved {
 
 		acc, err := be[0].(*keystore.KeyStore).Import(keyJSON, resp.oldPassword, resp.newPassword)
 		if err != nil {
+			api.ui.ShowError(err.Error())
 			return Account{}, err
 		}
 

cmd/signer/auditlog.go

@@ -1,23 +0,0 @@
-package main
-
-import (
-	"os"
-	"github.com/ethereum/go-ethereum/log"
-)
-
-type auditlogger struct{
-	filename string
-}
-func (al auditlogger) append(text string) error{
-	f, err := os.OpenFile(al.filename, os.O_APPEND|os.O_WRONLY, 0600)
-	if err != nil {
-		log.Crit("Failed to open audit log","err", err)
-		return err
-	}
-	defer f.Close()
-	if _, err = f.WriteString(text); err != nil {
-		log.Crit("Failed to write to audit log","err", err)
-		return err
-	}
-}
-

cmd/signer/cliui.go

@@ -54,21 +54,37 @@ func (ui *CommandlineUI) readString() string {
 // readPassword reads a single line from stdin, trimming it from the trailing new
 // line and returns it. The input will not be echoed.
 func (ui *CommandlineUI) readPassword() string {
+	fmt.Printf("Enter password to approve:\n")
 	fmt.Printf("> ")
 	text, err := terminal.ReadPassword(int(os.Stdin.Fd()))
 	if err != nil {
 		log.Crit("Failed to read password", "err", err)
 	}
 	fmt.Println()
+	fmt.Println("-----------------------")
+	return string(text)
+}
+
+// readPassword reads a single line from stdin, trimming it from the trailing new
+// line and returns it. The input will not be echoed.
+func (ui *CommandlineUI) readPasswordText(inputstring string) string {
+	fmt.Printf("Enter %s:\n", inputstring)
+	fmt.Printf("> ")
+	text, err := terminal.ReadPassword(int(os.Stdin.Fd()))
+	if err != nil {
+		log.Crit("Failed to read password", "err", err)
+	}
+	fmt.Println("-----------------------")
 	return string(text)
 }
 
 // confirm returns true if user enters 'Yes', otherwise false
 func (ui *CommandlineUI) confirm() bool {
-	fmt.Printf("Type 'Yes' to approve\n")
+	fmt.Printf("Type 'Yes' to approve:\n")
 	if ui.readString() == "Yes" {
 		return true
 	}
+	fmt.Println("-----------------------")
 	return false
 }
 
@@ -98,7 +114,7 @@ func (ui *CommandlineUI) ApproveTx(request *SignTxRequest, metadata Metadata, ch
 	showMetadata(metadata)
 	fmt.Printf("-------------------------------------------\n")
 
-	ch <- SignTxResponse{request.transaction.Hash(), ui.confirm(), ""}
+	ch <- SignTxResponse{request.transaction.Hash(), true ,ui.readPassword()}
 }
 
 // ApproveSignData prompt the user for confirmation to request to sign data
@@ -113,7 +129,7 @@ func (ui *CommandlineUI) ApproveSignData(request *SignDataRequest, metadata Meta
 	fmt.Printf("message hash:  %v\n", request.hash)
 	fmt.Printf("-------------------------------------------\n")
 	showMetadata(metadata)
-	ch <- SignDataResponse{ui.confirm(), ""}
+	ch <- SignDataResponse{true, ui.readPassword()}
 }
 
 // ApproveExport prompt the user for confirmation to export encrypted account json
@@ -141,7 +157,11 @@ func (ui *CommandlineUI) ApproveImport(request *ImportRequest, metadata Metadata
 	fmt.Printf("A request has been made to import an encrypted keyfile\n")
 	fmt.Printf("-------------------------------------------\n")
 	showMetadata(metadata)
-	ch <- ImportResponse{ui.confirm(), "", ""}
+	if ui.confirm(){
+		ch <- ImportResponse{true, ui.readPasswordText("Old password"), ui.readPasswordText("New password")}
+	}else{
+		ch <- ImportResponse{false, "", ""}
+	}
 }
 
 // ApproveListing prompt the user for confirmation to list accounts
@@ -177,17 +197,17 @@ func (ui *CommandlineUI) ApproveNewAccount(requst *NewAccountRequest, metadata M
 	fmt.Printf("Approving this operation means that a new account is created,\n")
 	fmt.Printf("and the address show to the caller\n")
 	showMetadata(metadata)
-	ch <- NewAccountResponse{ui.confirm(), ""}
+	ch <- NewAccountResponse{ui.confirm(), ui.readPassword()}
 }
 
 // ShowError displays error message to user
 func (ui *CommandlineUI) ShowError(message string) {
 
-	fmt.Printf("ERROR: %v", message)
+	fmt.Printf("ERROR: %v\n", message)
 }
 
 // ShowInfo displays info message to user
 func (ui *CommandlineUI) ShowInfo(message string) {
 
-	fmt.Printf("Info: %v", message)
+	fmt.Printf("Info: %v\n", message)
 }

cmd/signer/main.go

@@ -91,8 +91,7 @@ func main() {
 				c.Int64(utils.NetworkIdFlag.Name),
 				c.String("keystore"),
 				c.Bool(utils.NoUSBFlag.Name),
-				NewCommandlineUI(), db,
-				c.String("auditlog"))
+				NewCommandlineUI(), db)
 			listener net.Listener
 			//err      error
 		)