From bcc2c5b219762088c7941e1acd05dc1dfbbc4db7 Mon Sep 17 00:00:00 2001
From: olixina <695176656@qq.com>
Date: Tue, 11 Jan 2022 20:41:37 +0800
Subject: [PATCH] feat: add some decryption methods

---
 app/build.gradle                              |  3 +
 .../java/io/legado/app/help/JsExtensions.kt   | 72 +++++++++++++++++++
 2 files changed, 75 insertions(+)

diff --git a/app/build.gradle b/app/build.gradle
index a55fc455c..a3002fb65 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -219,6 +219,9 @@ dependencies {
     //转换繁体
     implementation('com.github.liuyueyi.quick-chinese-transfer:quick-transfer-core:0.2.3')
 
+    //加解密类库
+    implementation('cn.hutool:hutool-crypto:5.7.19')
+
     //代码编辑com.github.AmrDeveloper:CodeView已集成到应用内
     //epubLib集成到应用内
 
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 9b4eecb63..8b289f4bd 100644
--- a/app/src/main/java/io/legado/app/help/JsExtensions.kt
+++ b/app/src/main/java/io/legado/app/help/JsExtensions.kt
@@ -3,6 +3,8 @@ package io.legado.app.help
 import android.net.Uri
 import android.util.Base64
 import androidx.annotation.Keep
+import cn.hutool.crypto.symmetric.AES
+import cn.hutool.crypto.symmetric.DESede
 import io.legado.app.BuildConfig
 import io.legado.app.constant.AppConst
 import io.legado.app.constant.AppConst.dateFormat
@@ -688,4 +690,74 @@ interface JsExtensions {
         return AppConst.androidId
     }
 
+    /**
+     * AES解密，算法参数经过Base64加密
+     *
+     * @param data 加密的字符串
+     * @param key Base64后的密钥
+     * @param mode 模式
+     * @param padding 补码方式
+     * @param iv Base64后的加盐
+     * @return 解密后的字符串
+     */
+    fun aesDecodeArgsBase64Str(
+        data: String,
+        key: String,
+        mode: String,
+        padding: String,
+        iv: String
+    ): String? {
+        return AES(
+            mode,
+            padding,
+            Base64.decode(key, Base64.NO_WRAP),
+            Base64.decode(iv, Base64.NO_WRAP)
+        ).decryptStr(data)
+    }
+
+    /**
+     * 3DES解密
+     *
+     * @param data 加密的字符串
+     * @param key 密钥
+     * @param mode 模式
+     * @param padding 补码方式
+     * @param iv 加盐
+     * @return 解密后的字符串
+     */
+    fun tripleDESDecodeStr(
+        data: String,
+        key: String,
+        mode: String,
+        padding: String,
+        iv: String
+    ): String? {
+        return DESede(mode, padding, key.toByteArray(), iv.toByteArray()).decryptStr(data)
+    }
+
+    /**
+     * 3DES解密，算法参数经过Base64加密
+     *
+     * @param data 加密的字符串
+     * @param key Base64后的密钥
+     * @param mode 模式
+     * @param padding 补码方式
+     * @param iv Base64后的加盐
+     * @return 解密后的字符串
+     */
+    fun tripleDESDecodeArgsBase64Str(
+        data: String,
+        key: String,
+        mode: String,
+        padding: String,
+        iv: String
+    ): String? {
+        return DESede(
+            mode,
+            padding,
+            Base64.decode(key, Base64.NO_WRAP),
+            Base64.decode(iv, Base64.NO_WRAP)
+        ).decryptStr(data)
+    }
+
 }