Java を使用して画像を暗号化する必要があります。画像を適切に暗号化しましたが、ファイルを開こうとするとシステムが画像が長すぎるか破損したファイルであると表示するため、視覚化する方法がわかりません。pic ボディをメタデータなしで操作するにはどうすればよいですか?
ありがとう！！
// Scanner to read the user's password. The Java cryptography
// architecture points out that strong passwords in strings is a
// bad idea, but we'll let it go for this assignment.
Scanner scanner = new Scanner(System.in);
// Arbitrary salt data, used to make guessing attacks against the
// password more difficult to pull off.
byte[] salt = { (byte) 0xc7, (byte) 0x73, (byte) 0x21, (byte) 0x8c,
(byte) 0x7e, (byte) 0xc8, (byte) 0xee, (byte) 0x99 };
{
File inputFile = new File("C:/Users/Julio/Documents/charmander.png");
BufferedImage input = ImageIO.read(inputFile);
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
SecretKeyFactory keyFac = SecretKeyFactory
.getInstance("PBEWithMD5AndDES");
// Get a password from the user.
System.out.print("Password: ");
System.out.flush();
PBEKeySpec pbeKeySpec = new PBEKeySpec(scanner.nextLine()
.toCharArray());
// Set up other parameters to be used by the password-based
// encryption.
PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 20);
SecretKey pbeKey = keyFac.generateSecret(pbeKeySpec);
// Make a PBE Cyhper object and initialize it to encrypt using
// the given password.
Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
pbeCipher.init(Cipher.ENCRYPT_MODE, pbeKey, pbeParamSpec);
FileOutputStream output = new FileOutputStream(
"C:/Users/Julio/Documents/imgen.png");
CipherOutputStream cos = new CipherOutputStream(output, pbeCipher);
// File outputFile = new File("image.png");
ImageIO.write(input, "PNG", cos);
cos.close();
}
}