refactor: remove duplicate implements in StringUtils EncoerUtils

Break Changes:
- this commit remove symmetric function in `JsExtensions`

Duplicate Implements:
- cn.hutool.core.util.HexUtil
io.legado.app.utils.StringUtils.hexStringToByte
io.legado.app.utils.StringUtils.byteToHexString
cn.hutool.core.util.HexUtil
- cn.hutool.crypto.symmetric.*
io.legado.app.utils.EncoderUtils

app/src/main/java/io/legado/app/data/entities/BaseSource.kt

@@ -2,6 +2,7 @@ package io.legado.app.data.entities
 
 import android.util.Base64
 import com.script.SimpleBindings
+import cn.hutool.crypto.symmetric.AES
 import io.legado.app.constant.AppConst
 import io.legado.app.constant.AppLog
 import io.legado.app.data.entities.rule.RowUi
@@ -119,10 +120,7 @@ interface BaseSource : JsExtensions {
         try {
             val key = AppConst.androidId.encodeToByteArray(0, 16)
             val cache = CacheManager.get("userInfo_${getKey()}") ?: return null
-            val encodeBytes = Base64.decode(cache, Base64.DEFAULT)
+            return AES(key).decryptStr(cache)
-            val decodeBytes = EncoderUtils.decryptAES(encodeBytes, key)
-                ?: return null
-            return String(decodeBytes)
         } catch (e: Exception) {
             AppLog.put("获取登陆信息出错", e)
             return null
@@ -139,8 +137,7 @@ interface BaseSource : JsExtensions {
     fun putLoginInfo(info: String): Boolean {
         return try {
             val key = (AppConst.androidId).encodeToByteArray(0, 16)
-            val encodeBytes = EncoderUtils.encryptAES(info.toByteArray(), key)
+            val encodeStr = AES(key).encryptBase64(info)
-            val encodeStr = Base64.encodeToString(encodeBytes, Base64.DEFAULT)
             CacheManager.put("userInfo_${getKey()}", encodeStr)
             true
         } catch (e: Exception) {

app/src/main/java/io/legado/app/help/JsExtensions.kt

@@ -5,6 +5,7 @@ import android.util.Base64
 import androidx.annotation.Keep
 import cn.hutool.crypto.digest.DigestUtil
 import cn.hutool.crypto.digest.HMac
+import cn.hutool.core.util.HexUtil
 import io.legado.app.constant.AppConst
 import io.legado.app.constant.AppConst.dateFormat
 import io.legado.app.constant.AppLog
@@ -245,7 +246,7 @@ interface JsExtensions {
         )
         FileUtils.delete(path)
         val file = FileUtils.createFileIfNotExist(path)
-        StringUtils.hexStringToByte(content).let {
+        HexUtil.decodeHex(content).let {
             if (it.isNotEmpty()) {
                 file.writeBytes(it)
             }
@@ -510,7 +511,7 @@ interface JsExtensions {
         val bytes = if (url.isAbsUrl()) {
             AnalyzeUrl(url, source = getSource()).getByteArray()
         } else {
-            StringUtils.hexStringToByte(url)
+            HexUtil.decodeHex(url)
         }
         val bos = ByteArrayOutputStream()
         val zis = ZipInputStream(ByteArrayInputStream(bytes))
@@ -647,356 +648,6 @@ interface JsExtensions {
 
 //******************对称加密解密************************//
 
-    /////AES
-    /**
-     * AES 解码为 ByteArray
-     * @param str 传入的AES加密的数据
-     * @param key AES 解密的key
-     * @param transformation AES加密的方式
-     * @param iv ECB模式的偏移向量
-     */
-    fun aesDecodeToByteArray(
-        str: String, key: String, transformation: String, iv: String
-    ): ByteArray? {
-        return try {
-            EncoderUtils.decryptAES(
-                data = str.encodeToByteArray(),
-                key = key.encodeToByteArray(),
-                transformation,
-                iv.encodeToByteArray()
-            )
-        } catch (e: Exception) {
-            e.printOnDebug()
-            log(e.localizedMessage ?: "aesDecodeToByteArrayERROR")
-            null
-        }
-    }
-
-    /**
-     * AES 解码为 String
-     * @param str 传入的AES加密的数据
-     * @param key AES 解密的key
-     * @param transformation AES加密的方式
-     * @param iv ECB模式的偏移向量
-     */
-
-    fun aesDecodeToString(
-        str: String, key: String, transformation: String, iv: String
-    ): String? {
-        return aesDecodeToByteArray(str, key, transformation, iv)?.let { String(it) }
-    }
-
-    /**
-     * AES解码为String，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 EncoderUtils.decryptAES(
-            data.encodeToByteArray(),
-            Base64.decode(key, Base64.NO_WRAP),
-            "AES/${mode}/${padding}",
-            Base64.decode(iv, Base64.NO_WRAP)
-        )?.let { String(it) }
-    }
-
-    /**
-     * 已经base64的AES 解码为 ByteArray
-     * @param str 传入的AES Base64加密的数据
-     * @param key AES 解密的key
-     * @param transformation AES加密的方式
-     * @param iv ECB模式的偏移向量
-     */
-
-    fun aesBase64DecodeToByteArray(
-        str: String, key: String, transformation: String, iv: String
-    ): ByteArray? {
-        return try {
-            EncoderUtils.decryptBase64AES(
-                str.encodeToByteArray(),
-                key.encodeToByteArray(),
-                transformation,
-                iv.encodeToByteArray()
-            )
-        } catch (e: Exception) {
-            e.printOnDebug()
-            log(e.localizedMessage ?: "aesDecodeToByteArrayERROR")
-            null
-        }
-    }
-
-    /**
-     * 已经base64的AES 解码为 String
-     * @param str 传入的AES Base64加密的数据
-     * @param key AES 解密的key
-     * @param transformation AES加密的方式
-     * @param iv ECB模式的偏移向量
-     */
-
-    fun aesBase64DecodeToString(
-        str: String, key: String, transformation: String, iv: String
-    ): String? {
-        return aesBase64DecodeToByteArray(str, key, transformation, iv)?.let { String(it) }
-    }
-
-    /**
-     * 加密aes为ByteArray
-     * @param data 传入的原始数据
-     * @param key AES加密的key
-     * @param transformation AES加密的方式
-     * @param iv ECB模式的偏移向量
-     */
-    fun aesEncodeToByteArray(
-        data: String, key: String, transformation: String, iv: String
-    ): ByteArray? {
-        return try {
-            EncoderUtils.encryptAES(
-                data.encodeToByteArray(),
-                key = key.encodeToByteArray(),
-                transformation,
-                iv.encodeToByteArray()
-            )
-        } catch (e: Exception) {
-            e.printOnDebug()
-            log(e.localizedMessage ?: "aesEncodeToByteArrayERROR")
-            null
-        }
-    }
-
-    /**
-     * 加密aes为String
-     * @param data 传入的原始数据
-     * @param key AES加密的key
-     * @param transformation AES加密的方式
-     * @param iv ECB模式的偏移向量
-     */
-    fun aesEncodeToString(
-        data: String, key: String, transformation: String, iv: String
-    ): String? {
-        return aesEncodeToByteArray(data, key, transformation, iv)?.let { String(it) }
-    }
-
-    /**
-     * 加密aes后Base64化的ByteArray
-     * @param data 传入的原始数据
-     * @param key AES加密的key
-     * @param transformation AES加密的方式
-     * @param iv ECB模式的偏移向量
-     */
-    fun aesEncodeToBase64ByteArray(
-        data: String, key: String, transformation: String, iv: String
-    ): ByteArray? {
-        return try {
-            EncoderUtils.encryptAES2Base64(
-                data.encodeToByteArray(),
-                key.encodeToByteArray(),
-                transformation,
-                iv.encodeToByteArray()
-            )
-        } catch (e: Exception) {
-            e.printOnDebug()
-            log(e.localizedMessage ?: "aesEncodeToBase64ByteArrayERROR")
-            null
-        }
-    }
-
-    /**
-     * 加密aes后Base64化的String
-     * @param data 传入的原始数据
-     * @param key AES加密的key
-     * @param transformation AES加密的方式
-     * @param iv ECB模式的偏移向量
-     */
-    fun aesEncodeToBase64String(
-        data: String, key: String, transformation: String, iv: String
-    ): String? {
-        return aesEncodeToBase64ByteArray(data, key, transformation, iv)?.let { String(it) }
-    }
-
-
-    /**
-     * AES加密并转为Base64，算法参数经过Base64加密
-     *
-     * @param data 被加密的字符串
-     * @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 加密后的Base64
-     */
-    fun aesEncodeArgsBase64Str(
-        data: String,
-        key: String,
-        mode: String,
-        padding: String,
-        iv: String
-    ): String? {
-        return EncoderUtils.encryptAES2Base64(
-            data.encodeToByteArray(),
-            Base64.decode(key, Base64.NO_WRAP),
-            "AES/${mode}/${padding}",
-            Base64.decode(iv, Base64.NO_WRAP)
-        )?.let { String(it) }
-    }
-
-    /////DES
-    fun desDecodeToString(
-        data: String, key: String, transformation: String, iv: String
-    ): String? {
-        return EncoderUtils.decryptDES(
-            data.encodeToByteArray(),
-            key.encodeToByteArray(),
-            transformation,
-            iv.encodeToByteArray()
-        )?.let { String(it) }
-    }
-
-    fun desBase64DecodeToString(
-        data: String, key: String, transformation: String, iv: String
-    ): String? {
-        return EncoderUtils.decryptBase64DES(
-            data.encodeToByteArray(),
-            key.encodeToByteArray(),
-            transformation,
-            iv.encodeToByteArray()
-        )?.let { String(it) }
-    }
-
-    fun desEncodeToString(
-        data: String, key: String, transformation: String, iv: String
-    ): String? {
-        return EncoderUtils.encryptDES(
-            data.encodeToByteArray(),
-            key.encodeToByteArray(),
-            transformation,
-            iv.encodeToByteArray()
-        )?.let { String(it) }
-    }
-
-    fun desEncodeToBase64String(
-        data: String, key: String, transformation: String, iv: String
-    ): String? {
-        return EncoderUtils.encryptDES2Base64(
-            data.encodeToByteArray(),
-            key.encodeToByteArray(),
-            transformation,
-            iv.encodeToByteArray()
-        )?.let { String(it) }
-    }
-
-    //////3DES
-    /**
-     * 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 EncoderUtils.decryptDESede(
-            data.encodeToByteArray(),
-            key.encodeToByteArray(),
-            "DESede/${mode}/${padding}",
-            iv.encodeToByteArray()
-        )?.let { String(it) }
-    }
-
-    /**
-     * 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 EncoderUtils.decryptDESede(
-            data.encodeToByteArray(),
-            Base64.decode(key, Base64.NO_WRAP),
-            "DESede/${mode}/${padding}",
-            Base64.decode(iv, Base64.NO_WRAP)
-        )?.let { String(it) }
-    }
-
-
-    /**
-     * 3DES加密并转为Base64
-     *
-     * @param data 被加密的字符串
-     * @param key 密钥
-     * @param mode 模式
-     * @param padding 补码方式
-     * @param iv 加盐
-     * @return 加密后的Base64
-     */
-    fun tripleDESEncodeBase64Str(
-        data: String,
-        key: String,
-        mode: String,
-        padding: String,
-        iv: String
-    ): String? {
-        return EncoderUtils.encryptDESede2Base64(
-            data.encodeToByteArray(),
-            key.encodeToByteArray(),
-            "DESede/${mode}/${padding}",
-            iv.encodeToByteArray()
-        )?.let { String(it) }
-    }
-
-    /**
-     * 3DES加密并转为Base64，算法参数经过Base64加密
-     *
-     * @param data 被加密的字符串
-     * @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 加密后的Base64
-     */
-    fun tripleDESEncodeArgsBase64Str(
-        data: String,
-        key: String,
-        mode: String,
-        padding: String,
-        iv: String
-    ): String? {
-        return EncoderUtils.encryptDESede2Base64(
-            data.encodeToByteArray(),
-            Base64.decode(key, Base64.NO_WRAP),
-            "DESede/${mode}/${padding}",
-            Base64.decode(iv, Base64.NO_WRAP)
-        )?.let { String(it) }
-    }
-
 //******************消息摘要/散列消息鉴别码************************//
 
     /**

app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeUrl.kt

@@ -5,6 +5,7 @@ import android.util.Base64
 import androidx.annotation.Keep
 import com.bumptech.glide.load.model.GlideUrl
 import com.script.SimpleBindings
+import cn.hutool.core.util.HexUtil
 import io.legado.app.constant.AppConst.SCRIPT_ENGINE
 import io.legado.app.constant.AppConst.UA_NAME
 import io.legado.app.constant.AppPattern.JS_PATTERN
@@ -350,7 +351,7 @@ class AnalyzeUrl(
         useWebView: Boolean = true,
     ): StrResponse {
         if (type != null) {
-            return StrResponse(url, StringUtils.byteToHexString(getByteArrayAwait()))
+            return StrResponse(url, HexUtil.encodeHexStr(getByteArrayAwait()))
         }
         val concurrentRecord = fetchStart()
         setCookie(source?.getKey())

app/src/main/java/io/legado/app/utils/EncoderUtils.kt

@@ -1,13 +1,9 @@
 package io.legado.app.utils
 
 import android.util.Base64
-import cn.hutool.crypto.symmetric.SymmetricCrypto
-import java.security.spec.AlgorithmParameterSpec
-import javax.crypto.spec.IvParameterSpec
-import javax.crypto.spec.SecretKeySpec
 
 /**
- * transformations https://developer.android.google.cn/reference/kotlin/javax/crypto/Cipher?hl=en
+ * 编码工具 escape base64
  */
 @Suppress("unused")
 object EncoderUtils {
@@ -42,302 +38,4 @@ object EncoderUtils {
         return Base64.encodeToString(str.toByteArray(), flags)
     }
 
-    //////////AES Start
-
-    /**
-     * Return the Base64-encode bytes of AES encryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *AES/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the Base64-encode bytes of AES encryption
-     */
-    @Throws(Exception::class)
-    fun encryptAES2Base64(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String? = "AES/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return Base64.encode(encryptAES(data, key, transformation, iv), Base64.NO_WRAP)
-    }
-
-    /**
-     * Return the bytes of AES encryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *AES/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES encryption
-     */
-    @Throws(Exception::class)
-    fun encryptAES(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String? = "AES/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return symmetricTemplate(data, key, "AES", transformation!!, iv, true)
-    }
-
-
-    /**
-     * Return the bytes of AES decryption for Base64-encode bytes.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *AES/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES decryption for Base64-encode bytes
-     */
-    @Throws(Exception::class)
-    fun decryptBase64AES(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String = "AES/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return decryptAES(Base64.decode(data, Base64.NO_WRAP), key, transformation, iv)
-    }
-
-    /**
-     * Return the bytes of AES decryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *AES/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES decryption
-     */
-    @Throws(Exception::class)
-    fun decryptAES(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String = "AES/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return symmetricTemplate(data, key, "AES", transformation, iv, false)
-    }
-
-    //////////DES Start
-
-    /**
-     * Return the Base64-encode bytes of DES encryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *DES/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the Base64-encode bytes of AES encryption
-     */
-    @Throws(Exception::class)
-    fun encryptDES2Base64(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String? = "DES/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return Base64.encode(encryptDES(data, key, transformation, iv), Base64.NO_WRAP)
-    }
-
-    /**
-     * Return the bytes of DES encryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *DES/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES encryption
-     */
-    @Throws(Exception::class)
-    fun encryptDES(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String? = "DES/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return symmetricTemplate(data, key, "DES", transformation!!, iv, true)
-    }
-
-
-    /**
-     * Return the bytes of DES decryption for Base64-encode bytes.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *DES/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES decryption for Base64-encode bytes
-     */
-    @Throws(Exception::class)
-    fun decryptBase64DES(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String = "DES/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return decryptDES(Base64.decode(data, Base64.NO_WRAP), key, transformation, iv)
-    }
-
-    /**
-     * Return the bytes of DES decryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *DES/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES decryption
-     */
-    @Throws(Exception::class)
-    fun decryptDES(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String = "DES/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return symmetricTemplate(data, key, "DES", transformation, iv, false)
-    }
-
-    //////////DESede Start
-
-    /**
-     * Return the Base64-encode bytes of DESede encryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *DESede/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the Base64-encode bytes of AES encryption
-     */
-    @Throws(Exception::class)
-    fun encryptDESede2Base64(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String? = "DESede/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return Base64.encode(encryptDESede(data, key, transformation, iv), Base64.NO_WRAP)
-    }
-
-    /**
-     * Return the bytes of DESede encryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *DESede/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES encryption
-     */
-    @Throws(Exception::class)
-    fun encryptDESede(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String? = "DESede/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return symmetricTemplate(data, key, "DESede", transformation!!, iv, true)
-    }
-
-
-    /**
-     * Return the bytes of DESede decryption for Base64-encode bytes.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *DESede/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES decryption for Base64-encode bytes
-     */
-    @Throws(Exception::class)
-    fun decryptBase64DESede(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String = "DESede/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return decryptDESede(Base64.decode(data, Base64.NO_WRAP), key, transformation, iv)
-    }
-
-    /**
-     * Return the bytes of DESede decryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, *DESede/CBC/PKCS5Padding*.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @return the bytes of AES decryption
-     */
-    @Throws(Exception::class)
-    fun decryptDESede(
-        data: ByteArray?,
-        key: ByteArray?,
-        transformation: String = "DESede/ECB/PKCS5Padding",
-        iv: ByteArray? = null
-    ): ByteArray? {
-        return symmetricTemplate(data, key, "DESede", transformation, iv, false)
-    }
-
-    /**
-     * Return the bytes of symmetric encryption or decryption.
-     *
-     * @param data           The data.
-     * @param key            The key.
-     * @param algorithm      The name of algorithm.
-     * @param transformation The name of the transformation,
-     * 加密算法/加密模式/填充类型, <i>DES/CBC/PKCS5Padding</i>.
-     * @param iv             The buffer with the IV. The contents of the
-     * buffer are copied to protect against subsequent modification.
-     * @param isEncrypt      True to encrypt, false otherwise.
-     * @return the bytes of symmetric encryption or decryption
-     */
-    @Suppress("SameParameterValue")
-    @Throws(Exception::class)
-    private fun symmetricTemplate(
-        data: ByteArray?,
-        key: ByteArray?,
-        algorithm: String,
-        transformation: String,
-        iv: ByteArray?,
-        isEncrypt: Boolean
-    ): ByteArray? {
-        return if (data == null || data.isEmpty() || key == null || key.isEmpty()) null
-        else {
-            //hutool support zeropadding
-            val keySpec = SecretKeySpec(key, algorithm)
-            var params: AlgorithmParameterSpec? = null
-            if (iv != null && !iv.isEmpty()) {
-                params = IvParameterSpec(iv)
-            }
-            val symmetricCrypto = SymmetricCrypto(transformation, keySpec, params)
-            if (isEncrypt) symmetricCrypto.encrypt(data) else symmetricCrypto.decrypt(data)
-        }
-    }
-
-
 }

app/src/main/java/io/legado/app/utils/StringUtils.kt

@@ -287,30 +287,4 @@ object StringUtils {
         return buf.toString()
     }
 
-    fun byteToHexString(bytes: ByteArray?): String {
-        if (bytes == null) return ""
-        val sb = StringBuilder(bytes.size * 2)
-        for (b in bytes) {
-            val hex = 0xff and b.toInt()
-            if (hex < 16) {
-                sb.append('0')
-            }
-            sb.append(Integer.toHexString(hex))
-        }
-        return sb.toString()
-    }
-
-    fun hexStringToByte(hexString: String): ByteArray {
-        val hexStr = hexString.replace(" ", "")
-        val len = hexStr.length
-        val bytes = ByteArray(len / 2)
-        var i = 0
-        while (i < len) {
-            // 两位一组，表示一个字节,把这样表示的16进制字符串，还原成一个字节
-            bytes[i / 2] = ((Character.digit(hexString[i], 16) shl 4) +
-                    Character.digit(hexString[i + 1], 16)).toByte()
-            i += 2
-        }
-        return bytes
-    }
 }