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我正在尝试3DES加密字符串并使用this example将其存储在属性文件中。我遇到的问题是我不想直接从方法中将encrypt()和decrypt()的内容写入文件。我想将它存储在一个字符串中供以后使用。在字符串中存储3DES而不是CipherOutputStream
以下是我正在使用的方法。
正如你所看到的,这使用了CipherOutputStream和CipherInputStream。我如何将encrypt()和decrypt()的结果读入字符串而不是写入文件?
public static void encrypt(SecretKey key, InputStream in, OutputStream out)
throws NoSuchAlgorithmException, InvalidKeyException,
NoSuchPaddingException, IOException {
// Create and initialize the encryption engine
Cipher cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.ENCRYPT_MODE, key);
// Create a special output stream to do the work for us
CipherOutputStream cos = new CipherOutputStream(out, cipher);
// Read from the input and write to the encrypting output stream
byte[] buffer = new byte[2048];
int bytesRead;
while ((bytesRead = in.read(buffer)) != -1) {
cos.write(buffer, 0, bytesRead);
}
cos.close();
// For extra security, don't leave any plaintext hanging around memory.
java.util.Arrays.fill(buffer, (byte) 0);
}
/**
* Use the specified TripleDES key to decrypt bytes ready from the input
* stream and write them to the output stream. This method uses uses Cipher
* directly to show how it can be done without CipherInputStream and
* CipherOutputStream.
*/
public static void decrypt(SecretKey key, InputStream in, OutputStream out)
throws NoSuchAlgorithmException, InvalidKeyException, IOException,
IllegalBlockSizeException, NoSuchPaddingException,
BadPaddingException {
// Create and initialize the decryption engine
Cipher cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.DECRYPT_MODE, key);
// Read bytes, decrypt, and write them out.
byte[] buffer = new byte[2048];
int bytesRead;
while ((bytesRead = in.read(buffer)) != -1) {
out.write(cipher.update(buffer, 0, bytesRead));
}
// Write out the final bunch of decrypted bytes
out.write(cipher.doFinal());
out.flush();
}
我会尽快投票,但我是在屏幕之间翻转。但是既然你问了这个问题:即使你所说的直截了当,对于其他可能会遇到问题的人来说,n00bs的代码示例总是一个好主意。 – user316114
我知道。但已经很晚了,我在这里没有IDE。我尽量避免在不编译代码的情况下编写代码。但除此之外:一个不知道如何创建这些对象并将它们堆叠在一起的noob有可能还需要学习其他的东西;-) – GhostCat
这可能是更好的我没有提出代码。我会誓言发誓我已经提出了你的问题。不......我没有。 – GhostCat