Integrate cobra and viper

Makefile

@@ -16,7 +16,7 @@ install_all: install
 	git stash
 	rm -rf gui
 	rm -rf dfssd/gui
-	rm -f dfssd/main.go
+	rm -f dfssd/cmd/gui.go
 	go install ./...
 	git reset --hard
 

build/deps.sh

@@ -7,4 +7,6 @@ go get -u google.golang.org/grpc
 go get -u github.com/pborman/uuid
 go get -u github.com/stretchr/testify/assert
 go get -u golang.org/x/crypto/ssh/terminal
+go get -u github.com/spf13/viper
+go get -u github.com/spf13/cobra
 

dfssc/authenticate.go

-package main
-
-import (
-	"fmt"
-	"os"
-
-	"dfss/dfssc/user"
-)
-
-func authUser(_ []string) {
-	fmt.Println("Authenticating user")
-	var mail, token string
-
-	readStringParam("Mail", "", &mail)
-	readStringParam("Token", "", &token)
-
-	err := user.Authenticate(fca, fcert, addrPort, mail, token)
-	if err != nil {
-		fmt.Println("An error occurred : ", err.Error())
-		os.Exit(3)
-	}
-}

dfssc/cmd/authenticate.go

+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+
+	"dfss/dfssc/user"
+)
+
+var authCmd = &cobra.Command{
+	Use:   "auth",
+	Short: "authenticate a new client",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("Authenticating user")
+		var mail, token string
+
+		readStringParam("Mail", "", &mail)
+		readStringParam("Token", "", &token)
+
+		err := user.Authenticate(mail, token)
+		if err != nil {
+			fmt.Println("An error occurred : ", err.Error())
+			os.Exit(3)
+		}
+	},
+}

dfssc/cmd/fetch.go

+package cmd
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+
+	"dfss/dfssc/sign"
+)
+
+var fetchCmd = &cobra.Command{
+	Use:   "fetch",
+	Short: "get a contract hosted on the platform",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("Fetching a saved contract")
+
+		var passphrase, uuid, directory string
+		_ = readPassword(&passphrase, false)
+		readStringParam("Contract UUID", "", &uuid)
+		readStringParam("Save directory", ".", &directory)
+
+		path := filepath.Join(directory, uuid+".json")
+		err := sign.FetchContract(passphrase, uuid, path)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+		}
+	},
+}

dfssc/cmd/impexp.go

+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+
+	"dfss/dfssc/common"
+	"dfss/dfssc/user"
+)
+
+// export the certificate and private key of the user
+var exportCmd = &cobra.Command{
+	Use:   "export <c>",
+	Short: "export certificate and private key of the user to file c",
+	Run: func(cmd *cobra.Command, args []string) {
+		confFile := args[0]
+		fmt.Println("Export user configuration")
+		var keyPassphrase, confPassphrase string
+
+		config, err := user.NewConfig(common.SubViper("file_key", "file_cert"))
+		if err != nil {
+			_, _ = os.Stderr.WriteString(fmt.Sprintf("Couldn't open the files: %s", err))
+			os.Exit(1)
+			return
+		}
+
+		err = readPassphrases(&keyPassphrase, &confPassphrase, true)
+		if err != nil {
+			_, _ = os.Stderr.WriteString(fmt.Sprintf("An error occurred: %s", err))
+			os.Exit(1)
+			return
+		}
+
+		err = config.SaveConfigToFile(confFile, confPassphrase, keyPassphrase)
+		if err != nil {
+			_, _ = os.Stderr.WriteString(fmt.Sprintf("Couldn't save the configuration on the disk: %s", err))
+			os.Exit(1)
+			return
+		}
+	},
+}
+
+// import the configuration
+var importCmd = &cobra.Command{
+	Use:   "import <c>",
+	Short: "import private key and certificate of the user from file c",
+	Run: func(cmd *cobra.Command, args []string) {
+		confFile := args[0]
+		var keyPassphrase, confPassphrase string
+		err := readPassphrases(&keyPassphrase, &confPassphrase, false)
+		if err != nil {
+			_, _ = os.Stderr.WriteString(fmt.Sprintf("An error occurred: %s", err))
+			os.Exit(1)
+			return
+		}
+
+		config, err := user.DecodeConfiguration(confFile, keyPassphrase, confPassphrase)
+		if err != nil {
+			_, _ = os.Stderr.WriteString(fmt.Sprintf("Couldnd't decrypt the configuration: %s", err))
+			os.Exit(1)
+			return
+		}
+
+		err = config.SaveUserInformations()
+		if err != nil {
+			_, _ = os.Stderr.WriteString(fmt.Sprintf("Couldn't save the certificate and private key: %s", err))
+			os.Exit(1)
+			return
+		}
+	},
+}
+
+// Read two passphrases for the configuration
+func readPassphrases(keyPassphrase, confPassphrase *string, second bool) error {
+	fmt.Println("Enter the passphrase of the configuration")
+	err := readPassword(confPassphrase, second)
+	if err != nil {
+		return err
+	}
+
+	fmt.Println("Enter the passphrase of your current key (if any)")
+	return readPassword(keyPassphrase, false)
+}

dfssc/new.go → dfssc/cmd/new.go

-package main
+package cmd
 
 import (
 	"fmt"
 	"os"
 
+	"github.com/spf13/cobra"
+
 	"dfss/dfssc/sign"
 )
 
-func newContract(_ []string) {
-	fmt.Println("Creating a new contract")
-
-	passphrase, filepath, comment, signers := getContractInfo()
-	err := sign.SendNewContract(fca, fcert, fkey, addrPort, passphrase, filepath, comment, signers)
-	if err != nil {
-		fmt.Fprintln(os.Stderr, err)
-		os.Exit(1)
-	}
+var newCmd = &cobra.Command{
+	Use:   "new",
+	Short: "create a new contract",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("Creating a new contract")
+
+		passphrase, filepath, comment, signers := getContractInfo()
+		err := sign.SendNewContract(passphrase, filepath, comment, signers)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+		}
+	},
 }
 
 // getContractInfo asks user for contract informations

dfssc/register.go → dfssc/cmd/register.go

-package main
+package cmd
 
 import (
 	"bufio"
@@ -10,40 +10,46 @@ import (
 	"strings"
 
 	"dfss/dfssc/user"
+
+	"github.com/spf13/cobra"
 	"golang.org/x/crypto/ssh/terminal"
 )
 
-func registerUser(_ []string) {
-	fmt.Println("Registering a new user")
-	// Initialize variables
-	var country, mail, organization, unit, passphrase string
-	var bits int
-
-	name := "Jon Doe"
-	u, err := osuser.Current()
-	if err == nil {
-		name = u.Name
-	}
+var registerCmd = &cobra.Command{
+	Use:   "register",
+	Short: "register a new client",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("Registering a new user")
+		// Initialize variables
+		var country, mail, organization, unit, passphrase string
+		var bits int
+
+		name := "Jon Doe"
+		u, err := osuser.Current()
+		if err == nil {
+			name = u.Name
+		}
 
-	// Get all the necessary parameters
-	readStringParam("Mail", "", &mail)
-	readStringParam("Country", "FR", &country)
-	readStringParam("Organization", name, &organization)
-	readStringParam("Organizational unit", name, &unit)
-	readIntParam("Length of the key (2048 or 4096)", "2048", &bits)
-	err = readPassword(&passphrase, true)
-	if err != nil {
-		fmt.Println("An error occurred:", err.Error())
-		os.Exit(1)
-		return
-	}
+		// Get all the necessary parameters
+		readStringParam("Mail", "", &mail)
+		readStringParam("Country", "FR", &country)
+		readStringParam("Organization", name, &organization)
+		readStringParam("Organizational unit", name, &unit)
+		readIntParam("Length of the key (2048 or 4096)", "2048", &bits)
+		err = readPassword(&passphrase, true)
+		if err != nil {
+			fmt.Println("An error occurred:", err.Error())
+			os.Exit(1)
+			return
+		}
 
-	recapUser(mail, country, organization, unit)
-	err = user.Register(fca, fcert, fkey, addrPort, passphrase, country, organization, unit, mail, bits)
-	if err != nil {
-		fmt.Println("An error occurred:", err.Error())
-		os.Exit(2)
-	}
+		recapUser(mail, country, organization, unit)
+		err = user.Register(passphrase, country, organization, unit, mail, bits)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, "An error occurred:", err.Error())
+			os.Exit(2)
+		}
+	},
 }
 
 // We need to use ONLY ONE reader: buffio buffers some data (= consumes from stdin)

dfssc/cmd/root.go

+package cmd
+
+import (
+	"dfss"
+
+	dapi "dfss/dfssd/api"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// RootCmd is the main command for the dfssc application
+var RootCmd = &cobra.Command{
+	Use:   "dfssc",
+	Short: "DFSS command-line client",
+	Long: `Command-line client v` + dfss.Version + ` for the
+Distributed Fair Signing System project
+
+A tool to sign multiparty contract using a secure cryptographic protocol`,
+	Run: func(cmd *cobra.Command, args []string) {
+		_ = cmd.Help()
+	},
+	PersistentPreRun: func(cmd *cobra.Command, args []string) {
+		dapi.Configure(viper.GetString("demo") != "", viper.GetString("demo"), "client")
+	},
+	PersistentPostRun: func(cmd *cobra.Command, args []string) {
+		dapi.DClose()
+	},
+}
+
+// All of the flags will be gathered by viper, this is why
+// we do not store their values
+func init() {
+	// Bind flags to the dfsst command
+	RootCmd.PersistentFlags().BoolP("verbose", "v", false, "print verbose messages")
+	RootCmd.PersistentFlags().String("ca", "ca.pem", "path to the root certificate")
+	RootCmd.PersistentFlags().String("cert", "cert.pem", "path to the user's certificate")
+	RootCmd.PersistentFlags().String("key", "key.pem", "path to the user's private key")
+	RootCmd.PersistentFlags().StringP("demo", "d", "", "demonstrator address and port, empty will disable it")
+	RootCmd.PersistentFlags().String("host", "localhost:9000", "host of the dfss platform")
+	RootCmd.PersistentFlags().IntP("port", "p", 9005, "port to use for P2P communication between clients")
+
+	// Store flag values into viper
+	_ = viper.BindPFlag("verbose", RootCmd.PersistentFlags().Lookup("verbose"))
+	_ = viper.BindPFlag("file_ca", RootCmd.PersistentFlags().Lookup("ca"))
+	_ = viper.BindPFlag("file_cert", RootCmd.PersistentFlags().Lookup("cert"))
+	_ = viper.BindPFlag("file_key", RootCmd.PersistentFlags().Lookup("key"))
+	_ = viper.BindPFlag("demo", RootCmd.PersistentFlags().Lookup("demo"))
+	_ = viper.BindPFlag("local_port", RootCmd.PersistentFlags().Lookup("port"))
+	_ = viper.BindPFlag("platform_addrport", RootCmd.PersistentFlags().Lookup("host"))
+
+	// Bind subcommands to root
+	RootCmd.AddCommand(versionCmd, registerCmd, authCmd, newCmd, showCmd, fetchCmd, importCmd, exportCmd, signCmd)
+
+}

dfssc/show.go → dfssc/cmd/show.go

-package main
+package cmd
 
 import (
 	"bytes"
@@ -8,6 +8,8 @@ import (
 
 	"dfss/dfssc/common"
 	"dfss/dfssp/contract"
+
+	"github.com/spf13/cobra"
 )
 
 const contractShowTemplate = `UUID       : {{.UUID}}
@@ -22,22 +24,13 @@ Signers    :
 {{range .Signers}}  - {{.Email}}
 {{end}}`
 
-func getContract(filename string) *contract.JSON {
-	data, err := ioutil.ReadFile(filename)
-	if err != nil {
-		fmt.Println("Cannot open file:", err)
-		return nil
-	}
-
-	c, err := common.UnmarshalDFSSFile(data)
-	if err != nil {
-		fmt.Println("Corrupted file:", err)
-		return nil
-	}
-	return c
+var showCmd = &cobra.Command{
+	Use:   "show <c>",
+	Short: "print contract information from file c",
+	Run:   showContract,
 }
 
-func showContract(args []string) {
+func showContract(cmd *cobra.Command, args []string) {
 	filename := args[0]
 	c := getContract(filename)
 	if c == nil {
@@ -57,3 +50,18 @@ func showContract(args []string) {
 	}
 	fmt.Print(b.String())
 }
+
+func getContract(filename string) *contract.JSON {
+	data, err := ioutil.ReadFile(filename)
+	if err != nil {
+		fmt.Println("Cannot open file:", err)
+		return nil
+	}
+
+	c, err := common.UnmarshalDFSSFile(data)
+	if err != nil {
+		fmt.Println("Corrupted file:", err)
+		return nil
+	}
+	return c
+}

dfssc/cmd/sign.go

+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+
+	"dfss/dfssc/sign"
+)
+
+var signCmd = &cobra.Command{
+	Use:   "sign <c>",
+	Short: "sign contract from file c",
+	Run: func(cmd *cobra.Command, args []string) {
+		filename := args[0]
+		fmt.Println("You are going to sign the following contract:")
+		showContract(cmd, args)
+
+		contract := getContract(filename)
+		if contract == nil {
+			os.Exit(1)
+		}
+
+		var passphrase string
+		_ = readPassword(&passphrase, false)
+
+		// Preparation
+		manager, err := sign.NewSignatureManager(passphrase, contract)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(2)
+		}
+
+		manager.OnSignerStatusUpdate = signFeedbackFn
+		err = manager.ConnectToPeers()
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(3)
+		}
+
+		// Confirmation
+		var ready string
+		readStringParam("Do you REALLY want to sign "+contract.File.Name+"? Type 'yes' to confirm", "", &ready)
+		if ready != "yes" {
+			os.Exit(4)
+		}
+
+		// Ignition
+		fmt.Println("Waiting for other signers to be ready...")
+		signatureUUID, err := manager.SendReadySign()
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(5)
+		}
+
+		// TODO Warning, integration tests are checking Stdout
+		fmt.Println("Everybody is ready, starting the signature", signatureUUID)
+
+		// Signature
+		manager.OnProgressUpdate = signProgressFn
+		err = manager.Sign()
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(5)
+		}
+
+		// Persist evidencies, if any
+		err = manager.PersistSignaturesToFile()
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(5)
+		}
+
+		fmt.Println("Signature complete! See .proof file for evidences.")
+	},
+}
+
+func signFeedbackFn(mail string, status sign.SignerStatus, data string) {
+	if status == sign.StatusConnecting {
+		fmt.Println("- Trying to connect with", mail, "/", data)
+	} else if status == sign.StatusConnected {
+		fmt.Println("  Successfully connected!", "[", data, "]")
+	}
+}
+
+func signProgressFn(current int, max int) {}

dfssc/cmd/version.go

+package cmd
+
+import (
+	"dfss"
+	"fmt"
+	"runtime"
+
+	"github.com/spf13/cobra"
+)
+
+// versionCmd represents the version command
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print dfss protocol version",
+	Long:  "Print dfss protocol version",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("v"+dfss.Version, runtime.GOOS, runtime.GOARCH)
+	},
+}

dfssc/common/viper_helper.go

+package common
+
+import (
+	"github.com/spf13/viper"
+)
+
+// SubViper : From the singleton viper, creates another config
+// object which holds only a part of of the config
+func SubViper(args ...string) *viper.Viper {
+	v := viper.New()
+	for _, arg := range args {
+		v.Set(arg, viper.Get(arg))
+	}
+	return v
+}
+
+// MockViper : Creates a dummy viper object to use
+// in tests instead of the real one, the expected args
+// are key1, val1, key2, val2, etc...
+func MockViper(args ...interface{}) *viper.Viper {
+	v := viper.New()
+	key := ""
+	isValue := false
+	for _, arg := range args {
+		if isValue {
+			v.Set(key, arg)
+		} else {
+			key = arg.(string)
+		}
+		isValue = !isValue
+	}
+	return v
+}

dfssc/fetch.go

-package main
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-
-	"dfss/dfssc/sign"
-)
-
-func fetchContract(_ []string) {
-	fmt.Println("Fetching a saved contract")
-
-	var passphrase, uuid, directory string
-	_ = readPassword(&passphrase, false)
-	readStringParam("Contract UUID", "", &uuid)
-	readStringParam("Save directory", ".", &directory)
-
-	path := filepath.Join(directory, uuid+".json")
-	err := sign.FetchContract(fca, fcert, fkey, addrPort, passphrase, uuid, path)
-	if err != nil {
-		fmt.Fprintln(os.Stderr, err)
-		os.Exit(1)
-	}
-}

dfssc/impexp.go

-package main
-
-import (
-	"dfss/dfssc/user"
-	"fmt"
-	"os"
-)
-
-// export the certificate and private key of the user
-func exportConf(args []string) {
-	confFile := args[0]
-	fmt.Println("Export user configuration")
-	var keyPassphrase, confPassphrase string
-
-	config, err := user.NewConfig(fkey, fcert)
-	if err != nil {
-		_, _ = os.Stderr.WriteString(fmt.Sprintf("Couldn't open the files: %s", err))
-		os.Exit(1)
-		return
-	}
-
-	err = readPassphrases(&keyPassphrase, &confPassphrase, true)
-	if err != nil {