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add a verification code to CS UNREGISTER

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This commit is contained in:
Shivaram Lingamneni 2018-06-05 05:23:36 -04:00
parent 31f386f5a9
commit c3b66b5236
1 changed files with 20 additions and 3 deletions
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23
irc/chanserv.go
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@ -4,8 +4,11 @@
package irc
import (
"bytes"
"fmt"
"hash/crc32"
"sort"
"strconv"
"strings"
"github.com/goshuirc/irc-go/ircfmt"
@ -51,9 +54,11 @@ remembered.`,
},
"unregister": {
handler: csUnregisterHandler,
help: `Syntax: $bUNREGISTER #channel$b
help: `Syntax: $bUNREGISTER #channel [code]$b
UNREGISTER deletes a channel registration, allowing someone else to claim it.`,
UNREGISTER deletes a channel registration, allowing someone else to claim it.
To prevent accidental unregistrations, a verification code is required;
invoking the command without a code will display the necessary code.`,
helpShort: `$bUNREGISTER$b deletes a channel registration.`,
enabled: chanregEnabled,
},
@ -258,7 +263,7 @@ func csRegisterHandler(server *Server, client *Client, command, params string, r
}
func csUnregisterHandler(server *Server, client *Client, command, params string, rb *ResponseBuffer) {
channelName := strings.TrimSpace(params)
channelName, verificationCode := utils.ExtractParam(params)
channelKey, err := CasefoldChannel(channelName)
if channelKey == "" || err != nil {
csNotice(rb, client.t("Channel name is not valid"))
@ -282,6 +287,18 @@ func csUnregisterHandler(server *Server, client *Client, command, params string,
}
info := channel.ExportRegistration(0)
// verification code is the crc32 of the name, plus the registration time
var codeInput bytes.Buffer
codeInput.WriteString(info.Name)
codeInput.WriteString(strconv.FormatInt(info.RegisteredAt.Unix(), 16))
expectedCode := int(crc32.ChecksumIEEE(codeInput.Bytes()))
receivedCode, err := strconv.Atoi(verificationCode)
if err != nil || expectedCode != receivedCode {
csNotice(rb, client.t("$bWarning:$b Unregistering this channel will remove all stored channel attributes."))
csNotice(rb, fmt.Sprintf(client.t("To confirm channel unregistration, type: /CS UNREGISTER %s %d"), channelKey, expectedCode))
return
}
channel.SetUnregistered()
go server.channelRegistry.Delete(channelKey, info)
csNotice(rb, fmt.Sprintf(client.t("Channel %s is now unregistered"), channelKey))