我正在尝试使用RSA加密/解密文件。 但是我看不到文件中的数据。
这是代码：
// To encrypt a file
private static void encrypt(InputStream input, OutputStream output, PublicKey key)
throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
final Cipher encrypt = Cipher.getInstance(ALGORITHM);
// encrypt the plain text using the public key
encrypt.init(Cipher.ENCRYPT_MODE, key);
// encrypt.doFinal();
output = new CipherOutputStream(output,encrypt);
writeBytes(input, output, encrypt);
output.close();
}
// To decrypt the file
private static void decrypt(InputStream input, OutputStream output, PrivateKey key)
throws IOException,NoSuchAlgorithmException,InvalidKeyException,NoSuchPaddingException,BadPaddingException,IllegalBlockSizeException {
final Cipher decrypt = Cipher.getInstance(ALGORITHM);
// decrypt the text using the private key
decrypt.init(Cipher.DECRYPT_MODE, key);
input = new CipherInputStream(input, decrypt);
writeBytes(input, output, decrypt);
input.close();
}
// To write on the file from the inputstream
private static void writeBytes(InputStream input, OutputStream output, Cipher cipher)
throws IOException, IllegalBlockSizeException,BadPaddingException {
byte[] writeBuffer = new byte[512];
int readBytes = 0;
while ((readBytes = input.read(writeBuffer)) >= 0) {
System.out.println(readBytes);
// String text = input.read(writeBuffer);
// cipher.doFinal();
try{
System.out.println("Here");
output.write(writeBuffer, 0, readBytes);
}
catch(Exception e){
e.printStackTrace();
}
}
output.close();
input.close();
}
主功能 ：
// Check if the pair of keys are present else generate those.
if (!areKeysPresent()) {
// Method generates a pair of keys using the RSA algorithm and stores it
// in their respective files
generateKey();
}
final String originalText = "Text to be encrypted ";
ObjectInputStream inputStream = null;
String clearFile = "/UploadFile/Log.txt";
String encryptedFile = "/UploadFile/LogE.txt";
String decryptedFile = "/UploadFile/LogD.txt";
// Encrypt the string using the public key
inputStream = new ObjectInputStream(new FileInputStream(PUBLIC_KEY_FILE));
final PublicKey publicKey = (PublicKey) inputStream.readObject();
// final byte[] cipherText = encrypt(originalText, publicKey);
encrypt(new FileInputStream(clearFile), new FileOutputStream(encryptedFile), publicKey);
System.out.println("Successfully Encrypted");
}
// Decrypt the cipher text using the private key.
inputStream = new ObjectInputStream(new FileInputStream(PRIVATE_KEY_FILE));
final PrivateKey privateKey = (PrivateKey) inputStream.readObject();
// final String plainText = decrypt(cipherText, privateKey);
decrypt(new FileInputStream(encryptedFile), new FileOutputStream(decryptedFile), privateKey);
System.out.println("Successfully Decrypted");
GenerateKey Function :
public static void generateKey() {
try {
final KeyPairGenerator keyGen = KeyPairGenerator.getInstance(ALGORITHM);
keyGen.initialize(1024);
final KeyPair key = keyGen.generateKeyPair();
File privateKeyFile = new File(PRIVATE_KEY_FILE);
File publicKeyFile = new File(PUBLIC_KEY_FILE);
// Create files to store public and private key
if (privateKeyFile.getParentFile() != null) {
privateKeyFile.getParentFile().mkdirs();
}
privateKeyFile.createNewFile();
if (publicKeyFile.getParentFile() != null) {
publicKeyFile.getParentFile().mkdirs();
}
publicKeyFile.createNewFile();
// Saving the Public key in a file
ObjectOutputStream publicKeyOS = new ObjectOutputStream(
new FileOutputStream(publicKeyFile));
publicKeyOS.writeObject(key.getPublic());
publicKeyOS.close();
// Saving the Private key in a file
ObjectOutputStream privateKeyOS = new ObjectOutputStream(
new FileOutputStream(privateKeyFile));
privateKeyOS.writeObject(key.getPrivate());
privateKeyOS.close();
} catch (Exception e) {
e.printStackTrace();
}
}
我在加密和解密文件中都没有得到任何数据。
clearFile是原始数据文件，encryptedFile是加密数据，decryptedFile是解密数据。
请帮助，我在这里想念的。