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106 lines
2.8 KiB
106 lines
2.8 KiB
// Copyright © 2017 Ethan Frey
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"fmt"
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"net"
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"net/http"
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"os"
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"github.com/gorilla/handlers"
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"github.com/gorilla/mux"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"github.com/tendermint/go-crypto/keys/server"
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)
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// serveCmd represents the serve command
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var serveCmd = &cobra.Command{
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Use: "serve",
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Short: "Run the key manager as an http server",
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Long: `Launch an http server with a rest api to manage the
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private keys much more in depth than the cli can perform.
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In particular, this will allow you to sign transactions with
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the private keys in the store.`,
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RunE: serveHTTP,
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}
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func init() {
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RootCmd.AddCommand(serveCmd)
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serveCmd.Flags().IntP("port", "p", 8118, "TCP Port for listen for http server")
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serveCmd.Flags().StringP("socket", "s", "", "UNIX socket for more secure http server")
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serveCmd.Flags().StringP("type", "t", "ed25519", "Default key type (ed25519|secp256k1)")
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}
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func serveHTTP(cmd *cobra.Command, args []string) error {
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var l net.Listener
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var err error
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socket := viper.GetString("socket")
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if socket != "" {
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l, err = createSocket(socket)
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if err != nil {
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return errors.Wrap(err, "Cannot create socket")
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}
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} else {
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port := viper.GetInt("port")
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l, err = net.Listen("tcp", fmt.Sprintf(":%d", port))
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if err != nil {
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return errors.Errorf("Cannot listen on port %d", port)
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}
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}
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router := mux.NewRouter()
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ks := server.New(GetKeyManager(), viper.GetString("type"))
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ks.Register(router)
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// only set cors for tcp listener
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var h http.Handler
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if socket == "" {
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allowedHeaders := handlers.AllowedHeaders([]string{"Content-Type"})
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h = handlers.CORS(allowedHeaders)(router)
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} else {
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h = router
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}
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err = http.Serve(l, h)
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fmt.Printf("Server Killed: %+v\n", err)
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return nil
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}
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// createSocket deletes existing socket if there, creates a new one,
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// starts a server on the socket, and sets permissions to 0600
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func createSocket(socket string) (net.Listener, error) {
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err := os.Remove(socket)
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if err != nil && !os.IsNotExist(err) {
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// only fail if it does exist and cannot be deleted
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return nil, err
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}
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l, err := net.Listen("unix", socket)
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if err != nil {
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return nil, err
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}
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mode := os.FileMode(0700) | os.ModeSocket
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err = os.Chmod(socket, mode)
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if err != nil {
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l.Close()
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return nil, err
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}
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return l, nil
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}
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