initial commit

utils/token.go

@@ -0,0 +1,36 @@
+package utils
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+func GenerateToken(l int) (string, error) {
+	bytes := make([]byte, l)
+
+	_, err := rand.Read(bytes)
+	if err != nil {
+		return "", err
+	}
+
+	token := base64.StdEncoding.EncodeToString(bytes)
+
+	return token, nil
+}
+
+func EncodeToken(token string) (string, error) {
+	encodedToken, err := bcrypt.GenerateFromPassword([]byte(token), bcrypt.DefaultCost)
+	if err != nil {
+		return "", err
+	}
+
+	return string(encodedToken), nil
+}
+
+func CompareToken(hash string, token string) bool {
+	eq := bcrypt.CompareHashAndPassword([]byte(hash), []byte(token))
+
+	return eq == nil
+}