Implement account configuration save/load from db

1 files changed, 42 insertions, 0 deletions

diff --git a/util.go b/util.go
index c1da665..323f99d 100644
--- a/util.go
+++ b/util.go
@@ -1,10 +1,14 @@
 package main
 
 import (
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/json"
 	"fmt"
 	"unicode"
 
 	log "github.com/sirupsen/logrus"
+	"golang.org/x/crypto/nacl/secretbox"
 
 	. "git.deuxfleurs.fr/Deuxfleurs/easybridge/connector"
 )
@@ -56,3 +60,41 @@ func safeStringForId(in string) string {
 	}
 	return id2
 }
+
+// ---- Encoding and encryption of account config
+
+func encryptAccountConfig(config map[string]string, key *[32]byte) string {
+	bytes, err := json.Marshal(config)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	var nonce [24]byte
+	_, err = rand.Read(nonce[:])
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	crypto := secretbox.Seal([]byte{}, bytes, &nonce, key)
+	all := append(nonce[:], crypto...)
+	return base64.StdEncoding.EncodeToString(all)
+}
+
+func decryptAccountConfig(data string, key *[32]byte) (map[string]string, error) {
+	bytes, err := base64.StdEncoding.DecodeString(data)
+	if err != nil {
+		return nil, err
+	}
+
+	var nonce [24]byte
+	copy(nonce[:], bytes[:24])
+
+	decoded, ok := secretbox.Open([]byte{}, bytes[24:], &nonce, key)
+	if !ok {
+		return nil, fmt.Errorf("Invalid key")
+	}
+
+	var config map[string]string
+	err = json.Unmarshal(decoded, &config)
+	return config, err
+}