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main.go
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main.go
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package main
import (
"crypto/md5"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"io/fs"
"io/ioutil"
"log"
"math/rand"
"net/http"
"os"
"strconv"
"strings"
"time"
"github.com/bwmarrin/discordgo"
"github.com/fatih/color"
"github.com/gofiber/fiber/v2"
"github.com/joho/godotenv"
"github.com/gofiber/template/html"
recaptcha "github.com/r7com/go-recaptcha-v3"
)
type GConfig struct {
ID string `json:"guildId"`
ChannelID string `json:"channelId"`
RoleID string `json:"roleId"`
LogsChannelID string `json:"logsChannelId"`
}
type VUser struct {
RID string
UserID string
RTime int64
VerifyMessage *discordgo.Message
VGuild GConfig
}
type VData struct {
Fingerprint string `json:"print"`
CaptchaToken string `json:"token"`
}
type IpInfoBody struct {
Status string `json:"status"`
Result string `json:"result"`
QueryIP string `json:"queryIP"`
QueryFlags string `json:"queryFlags"`
QueryOFlags string `json:"queryOFlags"`
QueryFormat string `json:"queryFormat"`
Contact string `json:"contact"`
ICloudRelayEgress int `json:"iCloudRelayEgress"`
}
// Yes this is from an example I found on google.
const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
func randomString(n int) string {
sb := strings.Builder{}
sb.Grow(n)
for i := 0; i < n; i++ {
sb.WriteByte(charset[rand.Intn(len(charset))])
}
return sb.String()
}
var (
verifyTimeout int
guildConfigs []GConfig
verifyTracker []*VUser
discord *discordgo.Session
verificationUrl string
siteKey string
contactEmail string
setupPerms int64 = discordgo.PermissionAdministrator
dmPermsFalse = false // If theres a better way of doing this please let me know (bool -> *bool)
commands = []*discordgo.ApplicationCommand{
{
DMPermission: &dmPermsFalse,
DefaultMemberPermissions: &setupPerms,
Name: "setup",
Description: "The basic setup command",
Options: []*discordgo.ApplicationCommandOption{
{
Name: "verify-channel",
Description: "The channel where users can do /verify if a DM isn't sent",
Type: discordgo.ApplicationCommandOptionChannel,
ChannelTypes: []discordgo.ChannelType{
discordgo.ChannelTypeGuildText,
},
Required: true,
},
{
Name: "logs-channel",
Description: "The channel where verification logs will be sent",
Type: discordgo.ApplicationCommandOptionChannel,
ChannelTypes: []discordgo.ChannelType{
discordgo.ChannelTypeGuildText,
},
Required: true,
},
{
Type: discordgo.ApplicationCommandOptionRole,
Name: "verified-role",
Description: "The role that will be given on successful verification",
Required: true,
},
},
},
{
DMPermission: &dmPermsFalse,
Name: "verify",
Description: "Sends you a DM to verify",
},
}
commandHandlers = map[string]func(s *discordgo.Session, i *discordgo.InteractionCreate){}
)
func GetMD5Hash(text string) string {
hash := md5.Sum([]byte(text))
return hex.EncodeToString(hash[:])
}
func init() {
envErr := godotenv.Load()
if envErr != nil {
log.Fatal("Error loading .env file")
}
if _, err := os.Stat("banned.ips"); errors.Is(err, os.ErrNotExist) {
os.Create("banned.ips")
}
// Set some vars
verificationUrl = os.Getenv("URL_AND_PATH")
siteKey = os.Getenv("CAPTCHA_SITEKEY")
timeout, err2 := strconv.Atoi(os.Getenv("VERIFY_TIMEOUT"))
if err2 != nil {
log.Fatal("Invalid integer in .env (VERIFY_TIMOUT)")
}
verifyTimeout = timeout
// Load guild configs
gb, readErr := os.ReadFile("guilds.json")
if readErr != nil {
color.Red("Failed to read guild configs file, create it. 'guilds.json'")
}
err := json.Unmarshal(gb, &guildConfigs)
if err != nil {
log.Fatal(err)
}
discord, err = discordgo.New("Bot " + os.Getenv("TOKEN"))
if err != nil {
log.Fatal(err)
}
// Loading the command handler here because otherwise the env vars won't be loaded
commandHandlers = map[string]func(s *discordgo.Session, i *discordgo.InteractionCreate){
"setup": func(s *discordgo.Session, i *discordgo.InteractionCreate) {
opts := i.ApplicationCommandData().Options
verifyChannel := opts[0].ChannelValue(s)
logsChannel := opts[1].ChannelValue(s)
verifiedRole := opts[2].RoleValue(s, i.GuildID)
if verifyChannel == nil {
_, err := s.ChannelMessageSend(i.ChannelID, "I couldn't get the verify channel, is it invalid?")
if err != nil {
log.Println("Failed to send message to channel " + i.ChannelID)
}
return
}
if logsChannel == nil {
_, err := s.ChannelMessageSend(i.ChannelID, "I couldn't get the logs channel, is it invalid?")
if err != nil {
log.Println("Failed to send message to channel " + i.ChannelID)
}
return
}
_, err = s.ChannelMessageSendComplex(verifyChannel.ID, &discordgo.MessageSend{
Embeds: []*discordgo.MessageEmbed{{
Description: "To access the server you must verify, if you didn't get a DM:",
Fields: []*discordgo.MessageEmbedField{
{
Name: "Allow Direct Messages from this server",
Value: "Right Click the server -> Privacy Settings -> Allow DMs",
},
{
Name: "Do `/verify`",
Value: "After enabling DMs, run the verify command",
},
},
Author: &discordgo.MessageEmbedAuthor{
Name: "Verification",
IconURL: "https://cdn.discordapp.com/attachments/902975615014150174/927409586602901524/SmartSelect_20211230-171429_Instagram.jpg",
},
Color: 11953908,
}},
})
if err != nil {
log.Println("Failed to send message to channel " + i.ChannelID)
return
}
// basically this whole thing appends to the existing json, thats it.
gb, readErr := os.ReadFile("guilds.json")
if readErr != nil {
color.Red("Failed to read guild configs file, create it. 'guilds.json'")
}
guildConfigs = []GConfig{}
err = json.Unmarshal(gb, &guildConfigs)
if err != nil {
log.Println("Failed to parse JSON")
return
}
var foundOld = false
for index, gcold := range guildConfigs {
if gcold.ID == i.GuildID {
// Don't add a new one, just change the old one
guildConfigs[index] = GConfig{
ID: i.GuildID,
ChannelID: verifyChannel.ID,
RoleID: verifiedRole.ID,
LogsChannelID: logsChannel.ID,
}
foundOld = true
}
}
if !foundOld {
guildConfigs = append(guildConfigs, GConfig{
ID: i.GuildID,
ChannelID: verifyChannel.ID,
RoleID: verifiedRole.ID,
LogsChannelID: logsChannel.ID,
})
}
bm, err2 := json.Marshal(guildConfigs)
if err2 != nil {
color.Red("Failed to marshal a new guild config, :C")
}
err = os.WriteFile("guilds.json", bm, fs.FileMode(os.O_CREATE|os.O_RDWR))
if err != nil {
log.Println("Failed to write to guilds.json ")
return
}
// Respond with status
err = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
Type: discordgo.InteractionResponseChannelMessageWithSource,
Data: &discordgo.InteractionResponseData{
Embeds: []*discordgo.MessageEmbed{
{
Author: &discordgo.MessageEmbedAuthor{
Name: "The verification channel & roles have been successfully setup.",
IconURL: "https://cdn.discordapp.com/attachments/902975615014150174/920922567911571496/verified.png",
},
Color: 3140767,
},
},
},
})
if err != nil {
log.Println("Failed to send message to channel " + i.ChannelID)
return
}
},
"verify": func(s *discordgo.Session, i *discordgo.InteractionCreate) {
var vguild GConfig
for _, gc := range guildConfigs {
if gc.ID == i.GuildID {
vguild = gc
}
}
// Check if the user already has the verified role
for _, r := range i.Member.Roles {
if r == vguild.RoleID {
err := s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
Type: discordgo.InteractionResponseChannelMessageWithSource,
Data: &discordgo.InteractionResponseData{
Flags: discordgo.MessageFlagsEphemeral,
Content: "You've already been verified",
},
})
if err != nil {
log.Println("Failed to send message to channel " + i.ChannelID)
}
return
}
}
dm, err := s.UserChannelCreate(i.Member.User.ID)
if err != nil {
_, err := s.ChannelMessageSend(vguild.ChannelID, i.Member.Mention()+" I couldn't send you a DM, please go to settings and allow DMs from this server, then run the `/verify` command again.")
if err != nil {
log.Println("Failed to send message to channel " + i.ChannelID)
return
}
return
}
err = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
Type: discordgo.InteractionResponseChannelMessageWithSource,
Data: &discordgo.InteractionResponseData{
Flags: discordgo.MessageFlagsEphemeral,
Content: "I've sent you a DM!",
},
})
if err != nil {
log.Println("Failed to send message to channel " + i.ChannelID)
return
}
requestId := randomString(10)
m, err := s.ChannelMessageSendComplex(dm.ID, &discordgo.MessageSend{
Embeds: []*discordgo.MessageEmbed{{
Description: "To access the server you must verify, please make sure you:",
Fields: []*discordgo.MessageEmbedField{
{
Name: "Disable any VPN/Proxy",
Value: "To prevent bots from verifying we check if you are using a VPN or Proxy.",
},
{
Name: "Enable JavaScript",
Value: "If you can't verify, check if you have javascript enabled.",
},
},
Author: &discordgo.MessageEmbedAuthor{
Name: "User Verification",
IconURL: "https://cdn.discordapp.com/attachments/902975615014150174/927409586602901524/SmartSelect_20211230-171429_Instagram.jpg",
},
Color: 11953908,
}},
Components: []discordgo.MessageComponent{
discordgo.ActionsRow{
Components: []discordgo.MessageComponent{
discordgo.Button{
Style: discordgo.LinkButton,
Label: "Click to Verify",
URL: verificationUrl + "?id=" + requestId,
},
},
},
},
})
if err != nil {
log.Println("Failed to send message to channel " + i.ChannelID)
return
}
verifyTracker = append(verifyTracker, &VUser{
VGuild: vguild,
RID: requestId,
UserID: i.Member.User.ID,
RTime: time.Now().UnixMilli(),
VerifyMessage: m,
})
},
}
discord.AddHandler(func(s *discordgo.Session, r *discordgo.Ready) {
color.Green("[i | Login] Connected to %s#%s", r.User.Username, r.User.Discriminator)
err = s.UpdateStreamingStatus(0, "with Aether", "https://github.com/ImAETHER")
if err != nil {
log.Println("Failed to set status")
}
})
discord.AddHandler(func(s *discordgo.Session, i *discordgo.InteractionCreate) {
if i.Type != discordgo.InteractionApplicationCommand {
return
}
if cmd, ok := commandHandlers[i.ApplicationCommandData().Name]; ok {
cmd(s, i)
}
})
err = discord.Open()
if err != nil {
log.Fatal(err)
}
// Register all slash commands globally
registeredCommands := make([]*discordgo.ApplicationCommand, len(commands))
for i, v := range commands {
cmd, err := discord.ApplicationCommandCreate(discord.State.User.ID, "", v)
if err != nil {
log.Panicf("Cannot create '%v' command: %v", v.Name, err)
}
registeredCommands[i] = cmd
}
contactEmail = os.Getenv("EMAIL")
}
func main() {
color.Cyan("[i] Setting up..")
engine := html.New("./public/views", ".html")
engine.Delims("{{", "}}")
fiberConfig := fiber.Config{
Views: engine,
AppName: "Verifier v1.0",
EnableIPValidation: true,
}
if usingCF := os.Getenv("USING_CF"); usingCF == "true" {
fiberConfig.ProxyHeader = "CF-Connecting-IP"
}
app := fiber.New(fiberConfig)
recaptcha.Init(os.Getenv("CAPTCHA_SECRET"), 0.6, 5000)
// Make sure you do this for any file/assets you include in your html otherwise they wont load. learnt the hard way.
app.Static("/", "./public/css")
app.Get("/verify", func(ctx *fiber.Ctx) error {
if len(ctx.Query("id")) != 10 {
return ctx.Status(fiber.StatusBadRequest).Render("index", fiber.Map{
"Avatar": "https://cdn.discordapp.com/attachments/902975615014150174/920851081645400084/crosscircle.png",
"Status": "Invalid verification ID",
})
}
var user *VUser
for _, vu := range verifyTracker {
if vu.RID == ctx.Query("id") {
user = vu
break
}
}
if user == nil {
return ctx.Status(fiber.StatusNotFound).Render("index", fiber.Map{
"SiteKey": siteKey,
"Avatar": "https://cdn.discordapp.com/attachments/902975615014150174/920851081645400084/crosscircle.png",
"Status": "This link expired!",
})
}
if time.Duration(user.RTime-time.Now().UnixMilli()) > (time.Duration(verifyTimeout) * time.Minute) {
return ctx.Status(fiber.StatusOK).Render("index", fiber.Map{
"SiteKey": siteKey,
"Avatar": "https://cdn.discordapp.com/attachments/902975615014150174/920851081645400084/crosscircle.png",
"Status": "This link expired!",
})
}
duser, uerr := discord.User(user.UserID)
if uerr != nil {
return ctx.Status(fiber.StatusNotFound).Render("index", fiber.Map{
"SiteKey": siteKey,
"Avatar": "https://cdn.discordapp.com/attachments/902975615014150174/920945910589059102/userremoved.png",
"Status": "I couldn't find you!",
})
}
return ctx.Status(fiber.StatusOK).Render("index", fiber.Map{
"SiteKey": siteKey,
"Avatar": duser.AvatarURL(""),
"Status": "Verifying...",
})
})
// Actual captcha verification here.
app.Post("/verify", func(ctx *fiber.Ctx) error {
res := map[string]interface{}{}
if len(ctx.Query("id")) != 10 {
res["error"] = "Invalid ID"
return ctx.Status(fiber.StatusBadRequest).JSON(res)
}
var user *VUser
var userIndex int
for i, vu := range verifyTracker {
if vu.RID == ctx.Query("id") {
user = vu
userIndex = i
break
}
}
if user == nil {
res["error"] = "Link expired"
return ctx.Status(fiber.StatusNotFound).JSON(res)
}
var verifyData VData
err := json.Unmarshal(ctx.Body(), &verifyData)
if err != nil {
res["error"] = "Failed to parse verification data"
return ctx.Status(fiber.StatusInternalServerError).JSON(res)
}
content, err := ioutil.ReadFile("banned.ips")
if strings.Contains(string(content), GetMD5Hash(ctx.IP())) {
res["error"] = "User IP is banned"
return ctx.Status(fiber.StatusInternalServerError).JSON(res)
}
// Check for VPN/Proxy
response, err := http.Get(fmt.Sprintf("https://check.getipintel.net/check.php?ip=%s&contact=%s&format=json&flags=bm&oflags=i", ctx.IP(), contactEmail))
if err != nil {
res["error"] = "Failed to verify IP"
return ctx.Status(fiber.StatusInternalServerError).JSON(res)
}
var ipCheck IpInfoBody
err = json.NewDecoder(response.Body).Decode(&ipCheck)
if err != nil {
res["error"] = "Failed to parse IP verifier"
return ctx.Status(fiber.StatusInternalServerError).JSON(res)
}
iPCheckResult, err := strconv.ParseFloat(ipCheck.Result, 32)
if err != nil {
res["error"] = "Failed to parse IP result"
return ctx.Status(fiber.StatusInternalServerError).JSON(res)
}
// you can change this value I noticed it sits around 0.7 for me while working on this (I'm at school :laugh:)
if iPCheckResult >= 1.0 {
_, err := discord.ChannelMessageEditComplex(discordgo.NewMessageEdit(user.VerifyMessage.ChannelID, user.VerifyMessage.ID).SetEmbed(
&discordgo.MessageEmbed{
Description: "Verification failed due to the use of a Proxy/VPN. Please disable it and try again.",
Author: &discordgo.MessageEmbedAuthor{
Name: "Verification Failed",
IconURL: "https://cdn.discordapp.com/attachments/902975615014150174/920851081645400084/crosscircle.png",
},
Color: 16724542,
},
))
if err != nil {
log.Println("Failed to edit status message in dm channel: " + user.VerifyMessage.ChannelID)
}
sendChannelLog(user, fmt.Sprintf("<@%s> has failed verification due to the usage of a VPN/Proxy. \n\nIP Score: `%f` (lower is better)\nFingerprint: `%s`\nRequest ID: `%s`", user.UserID, iPCheckResult, verifyData.Fingerprint, user.RID), 16724542)
res["error"] = "IP/Proxy detected"
return ctx.Status(fiber.StatusBadRequest).JSON(res)
}
// Remove from verifyTracker
verifyTracker[userIndex] = verifyTracker[len(verifyTracker)-1]
verifyTracker = verifyTracker[:len(verifyTracker)-1]
if time.Duration(user.RTime-time.Now().UnixMilli()) > (time.Duration(verifyTimeout) * time.Minute) {
res["error"] = fmt.Sprintf("Link expired after %d mins.", verifyTimeout)
return ctx.Status(fiber.StatusBadRequest).JSON(res)
}
// Confirm the captcha
result, err := recaptcha.Confirm(verifyData.CaptchaToken, ctx.IP())
if err != nil {
res["error"] = "Failed to verify"
return ctx.Status(fiber.StatusInternalServerError).JSON(res)
}
if !result {
sendChannelLog(user, fmt.Sprintf("<@%s> has failed verification due to a low captcha score. \n\nIP Score: `%f` (lower is better)\nFingerprint: `%s`\nRequest ID: `%s`", user.UserID, iPCheckResult, verifyData.Fingerprint, user.RID), 16724542)
res["error"] = "Captcha verification failed"
return ctx.Status(fiber.StatusBadRequest).JSON(res)
}
err = discord.GuildMemberRoleAdd(user.VGuild.ID, user.UserID, user.VGuild.RoleID)
if err != nil {
sendChannelLog(user, fmt.Sprintf("<@%s> has failed verification due to an error assigning the verified role, please double check it exists & that I'm above the in the role hierarchy. \n\nIP Score: `%f` (lower is better)\nFingerprint: `%s`\nRequest ID: `%s`", user.UserID, iPCheckResult, verifyData.Fingerprint, user.RID), 16724542)
res["error"] = "Failed to add role"
return ctx.Status(fiber.StatusInternalServerError).JSON(res)
}
_, err = discord.ChannelMessageEditComplex(discordgo.NewMessageEdit(user.VerifyMessage.ChannelID, user.VerifyMessage.ID).SetEmbed(
&discordgo.MessageEmbed{
Description: "Successfully verified!",
Author: &discordgo.MessageEmbedAuthor{
Name: "Verification Passed",
IconURL: "https://cdn.discordapp.com/attachments/902975615014150174/920922567911571496/verified.png",
},
Color: 7789422,
},
))
if err != nil {
log.Println("Failed to edit status message in dm channel: " + user.VerifyMessage.ChannelID)
}
// Send to log message
sendChannelLog(user, fmt.Sprintf("<@%s> has passed verification. \n\nIP Score: `%f` (lower is better)\nFingerprint: `%s`\nRequest ID: `%s`", user.UserID, iPCheckResult, verifyData.Fingerprint, user.RID), 7789422)
return ctx.SendStatus(fiber.StatusOK)
})
color.Cyan("[i] Starting WebServer on port " + os.Getenv("PORT"))
log.Fatal(app.Listen(os.Getenv("PORT")))
}
func sendChannelLog(user *VUser, desc string, color int) {
_, err := discord.ChannelMessageSendEmbed(user.VGuild.LogsChannelID, &discordgo.MessageEmbed{
Author: &discordgo.MessageEmbedAuthor{
Name: "Verification Result",
IconURL: "https://cdn.discordapp.com/attachments/902975615014150174/947836104764170250/user.png",
},
Description: desc,
Timestamp: time.Now().Format("2006-01-02T15:04:05-0700"),
Color: color,
})
if err != nil {
log.Println("Failed to send status message to logs channel: " + user.VGuild.LogsChannelID)
log.Println(err)
}
}