내 안드로이드 응용 프로그램에서 보내고 응답 한 데이터가 AES 암호화로 암호화 된 웹 서비스와 통신 중입니다.AES 암호화 자바 -> PHP -> Java
그럼 내가하는 일은 다음과 같습니다. 나는 base64로 인코딩 된 AES 암호화 된 JSON String을 share.php로 보내고있다.
Share.php는이 문자열을 해독하여 데이터베이스에 삽입한다. 그런 다음 PHP는 응답을 암호화합니다.
내 Android 애플리케이션에서 디코딩해야하고이 메시지의 암호를 해독해야합니다.
그러나 PHP 응답의 암호 해독은 잘 진행되지 않습니다.
public class AES {
private final String characterEncoding = "UTF-8";
private final String cipherTransformation = "AES/ECB/PKCS5Padding";
private final String aesEncryptionAlgorithm = "AES";
public byte[] decrypt(byte[] cipherText, byte[] key, byte [] initialVector) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException
{
Cipher cipher = Cipher.getInstance(cipherTransformation);
SecretKeySpec secretKeySpecy = new SecretKeySpec(key, aesEncryptionAlgorithm);
//IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector);
//cipher.init(Cipher.DECRYPT_MODE, secretKeySpecy, ivParameterSpec);
cipher.init(Cipher.DECRYPT_MODE, secretKeySpecy);
System.out.println("Do final: "+cipherText);
cipherText = cipher.doFinal(cipherText);
return cipherText;
}
public byte[] encrypt(byte[] plainText, byte[] key, byte [] initialVector) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException
{
Cipher cipher = Cipher.getInstance(cipherTransformation);
SecretKeySpec secretKeySpec = new SecretKeySpec(key, aesEncryptionAlgorithm);
//IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector);
//cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec);
cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
plainText = cipher.doFinal(plainText);
return plainText;
}
private byte[] getKeyBytes(String key) throws UnsupportedEncodingException{
byte[] keyBytes= new byte[16];
byte[] parameterKeyBytes= key.getBytes(characterEncoding);
System.arraycopy(parameterKeyBytes, 0, keyBytes, 0, Math.min(parameterKeyBytes.length, keyBytes.length));
return keyBytes;
}
/// <summary>
/// Encrypts plaintext using AES 128bit key and a Chain Block Cipher and returns a base64 encoded string
/// </summary>
/// <param name="plainText">Plain text to encrypt</param>
/// <param name="key">Secret key</param>
/// <returns>Base64 encoded string</returns>
public String encrypt(String plainText, String key) throws UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException{
byte[] plainTextbytes = plainText.getBytes(characterEncoding);
byte[] keyBytes = getKeyBytes(key);
//return Base64.encodeToString(encrypt(plainTextbytes,keyBytes, keyBytes), Base64.DEFAULT);
return Base64.encodeToString(encrypt(plainTextbytes,keyBytes, new byte[0]), Base64.DEFAULT);
}
/// <summary>
/// Decrypts a base64 encoded string using the given key (AES 128bit key and a Chain Block Cipher)
/// </summary>
/// <param name="encryptedText">Base64 Encoded String</param>
/// <param name="key">Secret Key</param>
/// <returns>Decrypted String</returns>
public String decrypt(String encryptedText, String key) throws KeyException, GeneralSecurityException, GeneralSecurityException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, IOException{
byte[] cipheredBytes = Base64.decode(encryptedText, Base64.DEFAULT);
byte[] keyBytes = getKeyBytes(key);
//return new String(decrypt(cipheredBytes, keyBytes, keyBytes), characterEncoding);
return new String(decrypt(cipheredBytes, keyBytes, new byte[0]), characterEncoding);
}
}
그리고 이것은 PHP의 응답 암호화 EN 인코딩 할 수있는 코드입니다 :
이
내AES.java
입니다 내가 추측하고있어
function mc_encrypt($encrypt, $mc_key) {
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB), MCRYPT_RAND);
$passcrypt = trim(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $mc_key, trim($encrypt), MCRYPT_MODE_ECB, $iv));
$encode = base64_encode($passcrypt);
return $encode;
}
function mc_decrypt($decrypt, $mc_key) {
$decoded = base64_decode($decrypt);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB), MCRYPT_RAND);
$decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $mc_key, trim($decoded), MCRYPT_MODE_ECB, $iv));
return $decrypted;
}
을 그의 설정 PHP 암호화가 Java 부분의 설정과 일치하지 않습니다.
03-12 13:44:09.661: W/System.err(15717): javax.crypto.BadPaddingException: pad block corrupted
왜 https를 사용하지 않습니까? – kirilloid
한 가지는 패딩 모드가 일치하지 않는다는 것입니다. http://www.php.net/manual/de/ref.mcrypt.php#69782 – Niko