我用socket来传输文件，aes 256来加密/解密，我用字节数组来接受文件的内容并加密，但只有第一个字节大小的数组解密成功，其他出现了乱码（加密的字节大小扩展到1368，aes块大小是128位，不确定是否有效果），下面是我的代码：

  1. public void sendfile() {
  2. fis = new FileInputStream(file);
  3. bis = new BufferedInputStream(fis);
  4. byte[] byteArray = new byte[1024];
  5. int bytesCount = 0;
  6. while ((bytesCount = fis.read(byteArray)) >= 0) {
  7. String encryptString = new String(byteArray, "UTF-8");
  8. bos.write(EncryptAES.encrypt(encryptString, "12345").getBytes("UTF-8"));
  9. }
  10. }
  11. public void receiveFile(File file, BufferedInputStream bis) {
  12. fos = new FileOutputStream(file);
  13. bos = new BufferedOutputStream(fos);
  14. byte[] byteArray = new byte[1024];
  15. int bytesCount = 0;
  16. while ((bytesCount = bis.read(byteArray)) >= 0) {
  17. String encryptString = new String(byteArray, "UTF-8");
  18. bos.write(EncryptAES.decrypt(encryptString, "12345").getBytes("UTF-8"));
  19. }
  20. }
  22. public static String encrypt(String content,SecretKey secretKey) {
  23. byte[] enCodeFormat = secretKey.getEncoded();
  24. SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
  25. Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
  26. cipher.init(Cipher.ENCRYPT_MODE, secretKey);
  27. byte[] byteContent = cipher.doFinal(content.getBytes("UTF-8"));
  28. return Base64.getEncoder().withoutPadding().encodeToString(byteContent);
  29. }
  30. public static String decrypt(String content,SecretKey secretKey) {
  31. byte[] enCodeFormat = secretKey.getEncoded();
  32. SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
  33. Security.addProvider(new BouncyCastleProvider());
  34. Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding", "BC");
  35. cipher.init(Cipher.DECRYPT_MODE, key);
  36. byte[] byteCipherText = Base64.getDecoder().decode(content);
  37. String encryptString = new String(byteCipherText, "UTF-8");
  38. byte[] decryptedText = cipher.doFinal(byteCipherText);
  39. encryptString = new String(decryptedText, "UTF-8");
  40. return new String(decryptedText, "UTF-8");
  41. }