我想創建一個使用Java的流密碼,在該密碼中,我從文件中將純文本加密(使用種子值的簡單XOR與隨機密鑰)並將其存儲在不同的文件中,然後進行解密,再次從文件中取出密文並對其進行解密(與密鑰相同的XOR操作與加密相同)並存儲在文件中。使用java的流密碼
但是我在試圖加密大字符串時遇到問題。一半的字符串正在被正確解密,但另一半仍然是不可讀的格式。
FileReader fileReader = new FileReader(file);
// Always wrap FileReader in BufferedReader.
BufferedReader bufferedReader =
new BufferedReader(fileReader);
FileWriter fileWriter =
new FileWriter(file2);
// Always wrap FileWriter in BufferedWriter.
BufferedWriter bufferedWriter =
new BufferedWriter(fileWriter);
while((line = bufferedReader.readLine()) != null) {
sb = new StringBuffer (line);
int lenStr = line.length();
int lenKey = String.valueOf(random).length();
// For each character in our string, encrypt it...
for (int i = 0, j = 0; i < lenStr; i++, j++)
{
if (j >= lenKey) j = 0; // Wrap 'round to beginning of key string.
//
// XOR the chars together. Must cast back to char to avoid compile error.
//
String key = random + "";
bufferedWriter.write((char)(line.charAt(i)^key.charAt(j)));
}
}
// Always close files.
bufferedReader.close();
bufferedWriter.close();
哪一半?你的琴絃有多久了? –