diff --git a/app/src/main/java/io/legado/app/help/JsExtensions.kt b/app/src/main/java/io/legado/app/help/JsExtensions.kt
index 1db26a4fe..4e9bf6c41 100644
--- a/app/src/main/java/io/legado/app/help/JsExtensions.kt
+++ b/app/src/main/java/io/legado/app/help/JsExtensions.kt
@@ -29,6 +29,10 @@ object JsExtensions {
         return EncoderUtils.base64Decoder(str)
     }
 
+    fun base64Encoder(str: String): ByteArray? {
+        return EncoderUtils.base64Encoder(str)
+    }
+
     fun strToMd5By32(str: String?): String? {
         return MD5Utils.strToMd5By32(str)
     }
diff --git a/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt b/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt
index cba7bc0f1..287774a77 100644
--- a/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt
+++ b/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt
@@ -576,6 +576,18 @@ class AnalyzeRule(private var book: BaseBook? = null) {
         return EncoderUtils.base64Decoder(str)
     }
 
+    fun base64Encoder(str: String): ByteArray? {
+        return EncoderUtils.base64Encoder(str)
+    }
+
+    fun strToMd5By32(str: String?): String? {
+        return MD5Utils.strToMd5By32(str)
+    }
+
+    fun strToMd5By16(str: String?): String? {
+        return MD5Utils.strToMd5By16(str)
+    }
+
     /**
      * 章节数转数字
      */
@@ -592,14 +604,6 @@ class AnalyzeRule(private var book: BaseBook? = null) {
         }
     }
 
-    fun strToMd5By32(str: String?): String? {
-        return MD5Utils.strToMd5By32(str)
-    }
-
-    fun strToMd5By16(str: String?): String? {
-        return MD5Utils.strToMd5By16(str)
-    }
-
     companion object {
         private val putPattern = Pattern.compile("@put:(\\{[^}]+?\\})", Pattern.CASE_INSENSITIVE)
         private val getPattern = Pattern.compile("@get:\\{([^}]+?)\\}", Pattern.CASE_INSENSITIVE)
diff --git a/app/src/main/java/io/legado/app/utils/EncoderUtils.kt b/app/src/main/java/io/legado/app/utils/EncoderUtils.kt
index 112ac65f9..3798bfa9c 100644
--- a/app/src/main/java/io/legado/app/utils/EncoderUtils.kt
+++ b/app/src/main/java/io/legado/app/utils/EncoderUtils.kt
@@ -32,4 +32,8 @@ object EncoderUtils {
             String(bytes)
         }
     }
+
+    fun base64Encoder(str: String): ByteArray? {
+        return Base64.encode(str.toByteArray(), Base64.DEFAULT)
+    }
 }
\ No newline at end of file