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package main
import (
"bytes"
"crypto/ed25519"
"encoding/base64"
"flag"
"fmt"
"net/http"
"os"
"strings"
"time"
)
var pubKey ed25519.PublicKey
var privKey ed25519.PrivateKey
var id string
var servers []string
// Post new server list to DHT
func dhtPost(s string) {
message := []byte(fmt.Sprint(time.Now().Unix()) + "\n" + strings.Join(servers, "\n"))
fmt.Print(message)
message = append(message, ed25519.Sign(privKey, message)...)
http.Post(s+"/dht/"+id, "application/octet-stream", bytes.NewBuffer(message))
}
func main() {
flag.Parse()
if flag.Arg(0) == "setup" {
// Create keys
pubKey, privKey, err := ed25519.GenerateKey(nil)
if err != nil {
panic(err)
}
err = os.WriteFile("pubkey", pubKey, 0644)
if err != nil {
panic(err)
}
err = os.WriteFile("privkey", privKey, 0600)
if err != nil {
panic(err)
}
// Create servers file
_, err = os.Create("servers")
if err != nil {
panic(err)
}
fmt.Printf("Success! Your user ID: %s\n", base64.RawURLEncoding.EncodeToString(pubKey))
return
}
pubKeyBytes, err := os.ReadFile("pubkey")
if err != nil {
panic(err)
}
pubKey := ed25519.PublicKey(pubKeyBytes)
privKeyBytes, err := os.ReadFile("privkey")
if err != nil {
panic(err)
}
privKey := ed25519.PublicKey(privKeyBytes)
serversBytes, err := os.ReadFile("servers")
if err != nil {
panic(err)
}
id = base64.RawURLEncoding.EncodeToString(pubKey)
servers := strings.Split(string(serversBytes), "\n")
fmt.Println(pubKey, privKey, servers)
if flag.Arg(0) == "add" {
// Add server
servers = append(servers, flag.Arg(1))
dhtPost(flag.Arg(1))
http.Get(flag.Arg(1) + "/user/" + id)
if servers[0] != flag.Arg(1) {
http.Get(servers[0] + "/user/" + id)
}
err := os.WriteFile("servers", []byte(strings.Join(servers, "\n")), 0644)
if err != nil {
panic(err)
}
} else if flag.Arg(0) == "remove" {
// Remove server
for i := range servers {
if servers[i] == flag.Arg(1) {
servers = append(servers[:i], servers[i+1:]...)
break
}
}
if len(servers) > 0 {
dhtPost(servers[0])
http.Get(servers[0] + "/user/" + id)
} else {
dhtPost(flag.Arg(1))
}
http.Get(flag.Arg(1) + "/user/" + id)
err := os.WriteFile("servers", []byte(strings.Join(servers, "\n")), 0644)
if err != nil {
panic(err)
}
} else if flag.Arg(0) == "primary" {
// Make server a primary
for i := range servers {
if i > 0 && servers[i] == flag.Arg(1) {
servers[i] = servers[0]
servers[0] = flag.Arg(i)
dhtPost(flag.Arg(i))
http.Get(servers[0] + "/user/" + id)
http.Get(servers[i] + "/user/" + id)
break
}
}
err := os.WriteFile("servers", []byte(strings.Join(servers, "\n")), 0644)
if err != nil {
panic(err)
}
}
}
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