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annotate cmd/sievemgr/info.go @ 18:d14d93d011d7

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Show SASL mechanisms from before authentication in info output
author Guido Berhoerster <guido+sievemgr@berhoerster.name>
date Tue, 02 Feb 2021 23:57:37 +0100
parents 4dff4c3f0fbb
children fc5e6970a0d5
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0cd5a454dfb4 Add README file
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1 // Copyright (C) 2020 Guido Berhoerster <guido+sievemgr@berhoerster.name>
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2 //
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3 // Permission is hereby granted, free of charge, to any person obtaining
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4 // a copy of this software and associated documentation files (the
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5 // "Software"), to deal in the Software without restriction, including
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6 // without limitation the rights to use, copy, modify, merge, publish,
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7 // distribute, sublicense, and/or sell copies of the Software, and to
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8 // permit persons to whom the Software is furnished to do so, subject to
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9 // the following conditions:
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10 //
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11 // The above copyright notice and this permission notice shall be included
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12 // in all copies or substantial portions of the Software.
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13 //
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14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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17 // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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18 // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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19 // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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20 // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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21
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22 package main
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23
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24 import (
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25 "crypto/tls"
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26 "fmt"
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27 "net"
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28
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29 "go.guido-berhoerster.org/managesieve"
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30 )
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31
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32 func init() {
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33 cmdInfo.Flag.StringVar(&acctName, "a", "", "Select the account")
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34 }
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35
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36 var cmdInfo = &command{
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37 UsageLine: "info [options]",
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38 Run: runInfo,
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39 }
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40
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41 func runInfo(cmd *command, args []string) error {
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42 if len(args) != 0 {
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43 return usageError("invalid number of arguments")
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44 }
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45
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46 acct, err := getAccount(&conf, acctName)
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47 if err != nil {
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48 return err
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49 }
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50
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51 if err := lookupHostPort(acct); err != nil {
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52 return err
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53 }
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54
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55 if err := readPassword(acct); err != nil {
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56 return err
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57 }
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58
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59 // dialPlainAuth() is not used here so that SASL mechanisms can be
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60 // determined before authentication
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61 c, err := managesieve.Dial(net.JoinHostPort(acct.Host, acct.Port))
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62 if err != nil {
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63 return fmt.Errorf("failed to connect: %s", err)
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64 }
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66 // switch to a TLS connection except for localhost
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67 if acct.Host != "localhost" && acct.Host != "127.0.0.1" &&
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68 acct.Host != "::1" {
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69 tlsConf := &tls.Config{
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70 ServerName: acct.Host,
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71 InsecureSkipVerify: acct.Insecure,
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72 }
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73 if err := c.StartTLS(tlsConf); err != nil {
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74 return fmt.Errorf("failed to start TLS connection: %s",
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75 err)
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76 }
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77 }
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78 saslMechs := c.SASLMechanisms()
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79
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80 auth := managesieve.PlainAuth("", acct.User, acct.Password, acct.Host)
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81 if err := c.Authenticate(auth); err != nil {
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82 return fmt.Errorf("failed to authenticate user %s: %s",
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83 acct.User, err)
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84 }
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85 defer c.Logout()
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86
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87 fmt.Printf("%s (%s)\n", net.JoinHostPort(acct.Host, acct.Port),
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6db34a5344b8 Show server implementation in info output
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88 c.Implementation())
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89 if c.SupportsRFC5804() {
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90 fmt.Println("RFC5804 supported")
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91 }
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92 if c.SupportsTLS() {
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93 fmt.Println("STARTTLS supported")
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94 }
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95 fmt.Printf("SASL mechanisms:\n")
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96 for _, m := range saslMechs {
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97 fmt.Printf(" %s\n", m)
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98 }
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99 fmt.Printf("Extensions:\n")
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100 for _, e := range c.Extensions() {
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101 fmt.Printf(" %s\n", e)
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102 }
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103 fmt.Printf("Notification methods:\n")
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104 for _, m := range c.NotifyMethods() {
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105 fmt.Printf(" %s\n", m)
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106 }
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107
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108 return nil
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109 }