85 lines
2.3 KiB
Go
85 lines
2.3 KiB
Go
// Copyright (c) 2016 Arista Networks, Inc.
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// Use of this source code is governed by the Apache License 2.0
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// that can be found in the COPYING file.
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package client
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import (
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"crypto/tls"
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"crypto/x509"
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"flag"
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"io/ioutil"
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"strings"
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"github.com/aristanetworks/glog"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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)
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// ParseFlags registers some additional common flags,
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// parses the flags, and returns the resulting gRPC options,
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// and other settings to connect to the gRPC interface.
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func ParseFlags() (username string, password string, subscriptions, addrs []string,
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opts []grpc.DialOption) {
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var (
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addrsFlag = flag.String("addrs", "localhost:6030",
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"Comma-separated list of addresses of OpenConfig gRPC servers")
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caFileFlag = flag.String("cafile", "",
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"Path to server TLS certificate file")
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certFileFlag = flag.String("certfile", "",
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"Path to client TLS certificate file")
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keyFileFlag = flag.String("keyfile", "",
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"Path to client TLS private key file")
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passwordFlag = flag.String("password", "",
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"Password to authenticate with")
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subscribeFlag = flag.String("subscribe", "",
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"Comma-separated list of paths to subscribe to upon connecting to the server")
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usernameFlag = flag.String("username", "",
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"Username to authenticate with")
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tlsFlag = flag.Bool("tls", false,
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"Enable TLS")
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)
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flag.Parse()
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if *tlsFlag || *caFileFlag != "" || *certFileFlag != "" {
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config := &tls.Config{}
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if *caFileFlag != "" {
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b, err := ioutil.ReadFile(*caFileFlag)
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if err != nil {
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glog.Fatal(err)
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}
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cp := x509.NewCertPool()
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if !cp.AppendCertsFromPEM(b) {
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glog.Fatalf("credentials: failed to append certificates")
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}
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config.RootCAs = cp
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} else {
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config.InsecureSkipVerify = true
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}
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if *certFileFlag != "" {
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if *keyFileFlag == "" {
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glog.Fatalf("Please provide both -certfile and -keyfile")
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}
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cert, err := tls.LoadX509KeyPair(*certFileFlag, *keyFileFlag)
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if err != nil {
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glog.Fatal(err)
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}
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config.Certificates = []tls.Certificate{cert}
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}
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opts = append(opts, grpc.WithTransportCredentials(credentials.NewTLS(config)))
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} else {
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opts = append(opts, grpc.WithInsecure())
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}
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addrs = strings.Split(*addrsFlag, ",")
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subscriptions = strings.Split(*subscribeFlag, ",")
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return *usernameFlag, *passwordFlag, subscriptions, addrs, opts
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}
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