Add init command to auditor

coniksauditor/README.md

@@ -34,7 +34,7 @@ Use "coniksauditor [command] --help" for more information about a command.
 
 - Make sure you have at least one running CONIKS directory for your
 auditor to track. For information on setting up a CONIKS directory,
-see our [CONIKS server setup guide](https://github.com/coniks-sys/coniks-go/tree/master/coniksserver/README.md).
+see our [CONIKS server setup guide](https://github.com/coniks-sys/coniks-go/blob/master/coniksserver/README.md).
 
 - Generate the configuration file:
 ```
@@ -55,9 +55,9 @@ we currently only  configure the test auditor with a single directory for simplc
 ⇒  coniksauditor test  # this will open a REPL
 ```
 
-##### Retrieve and verify the latest STR history from the given directory
+##### Update the auditor with the latest STR history from the given directory
 ```
-> getlatest [dir]
+> update [dir]
 # The auditor should display something like this if the request is successful
 [+] Valid! The auditor is up-to-date on the STR history of [dir]
 ```

coniksauditor/cli/internal/cmd/init.go

@@ -0,0 +1,61 @@
+package cmd
+
+import (
+	"fmt"
+	"path"
+
+	"bytes"
+	"os"
+
+	"github.com/BurntSushi/toml"
+	"github.com/coniks-sys/coniks-go/coniksauditor"
+	"github.com/coniks-sys/coniks-go/utils"
+	"github.com/spf13/cobra"
+)
+
+var initCmd = &cobra.Command{
+	Use:   "init",
+	Short: "Creates a config file for the auditor.",
+	Long: `Creates a file config.toml in the current working directory with
+the following content:
+
+sign_pubkey_path = "../../keyserver/coniksserver/sign.pub"
+init_str_path = "../../keyserver/coniksserver/init_str"
+address = "tcp://127.0.0.1:3000"
+
+If the keyserver's public keys are somewhere else, you will have to modify the
+config file accordingly.
+`,
+	Run: func(cmd *cobra.Command, args []string) {
+		dir := cmd.Flag("dir").Value.String()
+		mkConfigOrExit(dir)
+	},
+}
+
+func init() {
+	RootCmd.AddCommand(initCmd)
+	initCmd.Flags().StringP("dir", "d", ".",
+		"Location of directory for storing generated files")
+}
+
+func mkConfigOrExit(dir string) {
+	file := path.Join(dir, "config.toml")
+	var conf = coniksauditor.DirectoryConfig{
+		SignPubkeyPath: "../../keyserver/coniksserver/sign.pub",
+		InitSTRPath:    "../../keyserver/coniksserver/init_str",
+		Address:        "tcp://127.0.0.1:3000",
+	}
+
+	var confBuf bytes.Buffer
+	enc := toml.NewEncoder(&confBuf)
+	if err := enc.Encode(conf); err != nil {
+		fmt.Println("Coulnd't encode config. Error message: [" +
+			err.Error() + "]")
+		os.Exit(-1)
+	}
+	if err := utils.WriteFile(file, confBuf.Bytes(), 0644); err != nil {
+		fmt.Println("Coulnd't write config. Error message: [" +
+			err.Error() + "]")
+		os.Exit(-1)
+	}
+}

coniksauditor/config.go

@@ -36,7 +36,6 @@ type Config []*DirectoryConfig
 // If there is any parsing or IO-error it returns an error (and the returned
 // config will be nil).
 func LoadConfig(file string) (*Config, error) {
-
 	var conf Config
 	// FIXME: Currently assuming there is only one tracked directory
 	// Add a loop here to iterate over multiple directory

coniksserver/cli/internal/cmd/init.go

@@ -56,6 +56,7 @@ func mkConfig(dir string) {
 	var conf = coniksserver.ServerConfig{
 		LoadedHistoryLength: 1000000,
 		Addresses:           addrs,
+		InitSTRPath:         "init_str",
 		Policies: &coniksserver.ServerPolicies{
 			EpochDeadline: 60,
 			VRFKeyPath:    "vrf.priv",

coniksserver/server.go

@@ -30,6 +30,8 @@ type ServerConfig struct {
 	LoadedHistoryLength uint64 `toml:"loaded_history_length"`
 	// Policies contains the server's CONIKS policies configuration.
 	Policies *ServerPolicies `toml:"policies"`
+	// Path to store the initial STR
+	InitSTRPath string `toml:"init_str_path"`
 	// Addresses contains the server's connections configuration.
 	Addresses      []*Address             `toml:"addresses"`
 	Logger         *binutils.LoggerConfig `toml:"logger"`
@@ -153,6 +155,11 @@ func NewConiksServer(conf *ServerConfig) *ConiksServer {
 		conf.Policies.signKey,
 		conf.LoadedHistoryLength,
 		true)
+
+	// save the initial STR to be used for initializing auditors
+	initSTRPath := utils.ResolvePath(conf.InitSTRPath, conf.configFilePath)
+	binutils.MarshalSTRToFile(server.dir.LatestSTR(), initSTRPath)
+
 	server.stop = make(chan struct{})
 	server.configFilePath = conf.configFilePath
 	server.reloadChan = make(chan os.Signal, 1)

utils/binutils/encoding.go

@@ -2,8 +2,10 @@ package binutils
 
 import (
 	"encoding/json"
+	"log"
 
 	"github.com/coniks-sys/coniks-go/protocol"
+	"github.com/coniks-sys/coniks-go/utils"
 )
 
 // MarshalResponse returns a JSON encoding of the server's response.
@@ -66,3 +68,17 @@ func UnmarshalResponse(t int, msg []byte) *protocol.Response {
 		panic("Unknown request type")
 	}
 }
+
+// MarshalSTRToFile serializes the given STR to the given path.
+func MarshalSTRToFile(str *protocol.DirSTR, path string) {
+	strBytes, err := json.Marshal(str)
+	if err != nil {
+		log.Print(err)
+		return
+	}
+
+	if err := utils.WriteFile(path, strBytes, 0600); err != nil {
+		log.Println(err)
+		return
+	}
+}