143 lines
3.6 KiB
Go
143 lines
3.6 KiB
Go
package main
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import (
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"crypto/rand"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"strings"
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"unicode"
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log "github.com/sirupsen/logrus"
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"golang.org/x/crypto/nacl/secretbox"
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. "git.deuxfleurs.fr/Deuxfleurs/easybridge/connector"
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)
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const EASYBRIDGE_SYSTEM_PROTOCOL string = "✯◡✯"
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func ezbrMxId() string {
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return fmt.Sprintf("@%s:%s", registration.SenderLocalpart, config.MatrixDomain)
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}
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func ezbrSystemRoom(user_mx_id string) (string, error) {
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mx_room_id, err := dbGetMxPmRoom(EASYBRIDGE_SYSTEM_PROTOCOL, UserID("Easybridge"), ezbrMxId(), user_mx_id, "easybridge")
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if err != nil {
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return "", err
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}
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widget_kv_key := "ezbr_widget_on:" + mx_room_id
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if config.WebURL != "" && dbKvTestAndSet(widget_kv_key, "yes") {
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widget := map[string]interface{}{
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"type": "m.easybridge",
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"url": config.WebURL,
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"name": "Easybridge account configuration dashboard",
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}
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err = mx.PutStateAs(mx_room_id, "im.vector.modular.widgets", "ezbr_widget", widget, ezbrMxId())
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if err != nil {
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dbKvPut(widget_kv_key, "")
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}
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}
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return mx_room_id, nil
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}
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func ezbrSystemSend(user_mx_id string, msg string) {
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mx_room_id, err := ezbrSystemRoom(user_mx_id)
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if err == nil {
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err = mx.SendMessageAs(mx_room_id, "m.text", msg, ezbrMxId())
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}
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if err != nil {
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log.Warnf("(%s) %s", user_mx_id, msg)
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}
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}
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func ezbrSystemSendf(user_mx_id string, format string, args ...interface{}) {
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ezbrSystemSend(user_mx_id, fmt.Sprintf(format, args...))
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}
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// ----
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func roomAlias(protocol string, id RoomID) string {
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what := fmt.Sprintf("%s_%s", safeStringForId(string(id)), protocol)
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return strings.Replace(config.NameFormat, "{}", what, 1)
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}
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func userMxId(protocol string, id UserID) string {
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what := fmt.Sprintf("%s_%s", safeStringForId(string(id)), protocol)
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return strings.Replace(config.NameFormat, "{}", what, 1)
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}
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func safeStringForId(in string) string {
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id2 := ""
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for _, c := range in {
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if c == '@' {
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id2 += "__"
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} else if c == ':' {
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id2 += "_"
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} else if unicode.IsDigit(c) || unicode.IsLetter(c) || c == '.' || c == '-' || c == '_' {
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id2 += string(c)
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}
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}
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return id2
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}
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func isBridgedIdentifier(mxid string) bool {
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if mxid[0] == '@' || mxid[0] == '#' {
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return isBridgedIdentifier(mxid[1:])
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}
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if strings.Contains(mxid, ":") {
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sp := strings.Split(mxid, ":")
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return (sp[1] == config.MatrixDomain) && isBridgedIdentifier(sp[0])
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}
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nameformat_fixed_part := strings.Replace(config.NameFormat, "{}", "", 1)
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if strings.HasPrefix(config.NameFormat, "{}") {
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return strings.HasSuffix(mxid, nameformat_fixed_part)
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} else if strings.HasSuffix(config.NameFormat, "{}") {
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return strings.HasPrefix(mxid, nameformat_fixed_part)
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} else {
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// This is not supported
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log.Fatal("Invalid name format %s, please put {} at the beginning or at the end", config.NameFormat)
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return false
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}
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}
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// ---- Encoding and encryption of account config
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func encryptAccountConfig(config map[string]string, key *[32]byte) string {
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bytes, err := json.Marshal(config)
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if err != nil {
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log.Fatal(err)
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}
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var nonce [24]byte
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_, err = rand.Read(nonce[:])
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if err != nil {
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log.Fatal(err)
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}
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crypto := secretbox.Seal([]byte{}, bytes, &nonce, key)
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all := append(nonce[:], crypto...)
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return base64.StdEncoding.EncodeToString(all)
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}
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func decryptAccountConfig(data string, key *[32]byte) (map[string]string, error) {
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bytes, err := base64.StdEncoding.DecodeString(data)
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if err != nil {
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return nil, err
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}
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var nonce [24]byte
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copy(nonce[:], bytes[:24])
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decoded, ok := secretbox.Open([]byte{}, bytes[24:], &nonce, key)
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if !ok {
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return nil, fmt.Errorf("Invalid key")
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}
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var config map[string]string
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err = json.Unmarshal(decoded, &config)
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return config, err
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}
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