问题遇到的现象和发生背景
使用des解密时 抛出异常 javax.crypto.BadPaddingException: Given final block not properly padded
问题相关代码,请勿粘贴截图
public static String decrypt(String text, String key, String charset)
throws Exception {
Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
cipher.init(2, getKey(key));
byte[] textBytes = parseHexStr2Byte(text);
byte[] bytes = cipher.doFinal(textBytes);
String decryptString = new String(bytes, charset);
return trimToEmpty(decryptString);
}
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1) {
return null;
}
byte[] result = new byte[hexStr.length() / 2];
for (int i = 0; i < hexStr.length() / 2; i++) {
int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
result[i] = ((byte) (high * 16 + low));
}
return result;
}
运行结果及报错内容
异常报错:javax.crypto.BadPaddingException: Given final block not properly padded
我的解答思路和尝试过的方法
转8进制 各种搜索都试过了
我想要达到的结果
正常输出明文