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我必須做以下操作：墊座損壞
- 加密VB - >解密VB
- 加密的Android - 解密的Android
- 加密VB - >解密的Android
- 加密的Android - >解密VB
到目前爲止，我成功地在Android上進行了加密和解密。 當我在VB加密和嘗試解密在Android上，我得到以下異常：
E /例外：墊塊損壞
我還不得不提到的是，當我在VB加密短字符串並將其解密也在VB中，一切運作良好。但是，當我加密一個更大的字節數組時，解密工作，但結果不是預期的結果。
有人能給我提示如何解決這個問題嗎？ 謝謝！
這裏是我的代碼：
.NET函數
Public Function AES_Encrypt2(ByVal byteArray() As Byte, ByVal key As String, Optional ByVal ShortKey As Boolean = False) As String
Try
Dim FirstKeyBytes() As Byte = Encoding.UTF8.GetBytes(key)
If Not FirstKeyBytes Is Nothing Then
If FirstKeyBytes.Length < 32 Then
Array.Resize(FirstKeyBytes, 32)
End If
End If
Dim KeyBytes() As Byte
If ShortKey Then
KeyBytes = New Byte(15) {}
Array.Copy(FirstKeyBytes, KeyBytes, 16)
Else
KeyBytes = New Byte(31) {}
Array.Copy(FirstKeyBytes, KeyBytes, 32)
End If
Dim InitialVectorBytes() As Byte = New Byte() {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} 'Encoding.UTF8.GetBytes("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0")
Dim SymmetricKey As New RijndaelManaged()
SymmetricKey.Mode = CipherMode.CBC
SymmetricKey.Padding = PaddingMode.PKCS7
Dim Encryptor As ICryptoTransform = SymmetricKey.CreateEncryptor(KeyBytes, InitialVectorBytes)
Dim MemStream As New MemoryStream()
Dim CryptoStream As New CryptoStream(MemStream, Encryptor, CryptoStreamMode.Write)
CryptoStream.Write(byteArray, 0, byteArray.Length)
CryptoStream.FlushFinalBlock()
MemStream.Close()
CryptoStream.Close()
Dim CipherTextBytes As Byte() = MemStream.ToArray()
Dim encryptedString As String = Convert.ToBase64String(CipherTextBytes)
Return encryptedString
Catch ex As Exception
Return String.Empty
End Try
End Function
Public Function AES_Decrypt2(ByVal encryptedString As String, ByVal key As String, Optional ByVal ShortKey As Boolean = False) As String
Try
Dim PlainTextBytes1 As Byte() = Convert.FromBase64String(encryptedString)
Dim FirstKeyBytes() As Byte = Encoding.UTF8.GetBytes(key)
If Not FirstKeyBytes Is Nothing Then
If FirstKeyBytes.Length < 32 Then
Array.Resize(FirstKeyBytes, 32)
End If
End If
Dim KeyBytes() As Byte
If ShortKey Then
KeyBytes = New Byte(15) {}
Array.Copy(FirstKeyBytes, KeyBytes, 16)
Else
KeyBytes = New Byte(31) {}
Array.Copy(FirstKeyBytes, KeyBytes, 32)
End If
Dim SymmetricKey As New RijndaelManaged()
Dim InitialVectorBytes As Byte() = New Byte() {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} 'Encoding.UTF8.GetBytes("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0")
SymmetricKey.Mode = CipherMode.CBC
SymmetricKey.Padding = PaddingMode.PKCS7
Dim Decryptor As ICryptoTransform = SymmetricKey.CreateDecryptor(KeyBytes, InitialVectorBytes)
Dim MemStream1 As New MemoryStream(PlainTextBytes1)
Dim CryptoStream As New CryptoStream(MemStream1, Decryptor, CryptoStreamMode.Read)
Dim pltxt As Byte() = New Byte(PlainTextBytes1.Length - 1) {}
Dim d As Integer = CryptoStream.Read(pltxt, 0, pltxt.Length)
MemStream1.Close()
CryptoStream.Close()
Dim textConverter As New ASCIIEncoding()
Dim round As String = textConverter.GetString(pltxt, 0, d)
Return round
Catch ex As Exception
Return String.Empty
End Try
End Function
和Android方法：
public static String encrypt(byte[] input, String key) {
try {
byte[] iv = new byte[16];
AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv);
String newKey = "";
if (key.length() >= 32) {
newKey = key.substring(0, 32);
} else {
for (int i = key.length(); i < 32; i++) {
key += "0";
}
newKey = key.substring(0, 32);
}
SecretKeySpec skeySpec = new SecretKeySpec(newKey.getBytes(), "AES");
//skeySpec = new SecretKeySpec(newKey.getBytes(), 0, newKey.length(), "AES");
Cipher fileCipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
fileCipher.init(1, skeySpec, paramSpec);
byte[] decrypted = fileCipher.doFinal(input);
byte[] base64enc = Base64.encode(decrypted, 0);
return new String(base64enc);
} catch (Exception e) {
Log.e("Exception", e.getMessage());
}
return null;
}
public static byte[] decrypt(String input, String key) {
try {
byte[] iv = new byte[16];
AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv);
byte[] base64enc = Base64.decode(input.getBytes(), 0);
String newKey = "";
if (key.length() >= 32) {
newKey = key.substring(0, 32);
} else {
for (int i = key.length(); i < 32; i++) {
key += "0";
}
newKey = key.substring(0, 32);;
}
SecretKeySpec skeySpec = new SecretKeySpec(newKey.getBytes(), "AES");
Cipher fileCipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
fileCipher.init(2, skeySpec, paramSpec);
int x = base64enc.length;
return fileCipher.doFinal(base64enc);
} catch (Exception e) {
Log.e("Exception: ", e.getMessage());
}
return null;
}