kindly provide me the equivalent
java implementation of the following Symmetric key encryption and decryption using Rijndael algorithm implemented in VB
Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports System.Text
Imports System.Security.Cryptography
Public Class crypto
Private Const passPhrase As
String = "Pas5pr@sekishan"
Private Const saltValue As String = "s@1tValuekishan"
Private Const hashAlgorithm As String = "SHA1"
Private Const passwordIterations As Integer = 2
Private Const initVector As String = "@1B2c3D4e5F6kishan"
Private Const keySize As Integer = 256
Private Function Encrypt(ByVal plainText As String, _
ByVal passPhrase As String, _
ByVal saltValue As String, _
ByVal hashAlgorithm As String, _
ByVal passwordIterations As Integer, _
ByVal initVector As String, _
ByVal keySize As Integer) _
As String
Dim initVectorBytes As Byte()
initVectorBytes = Encoding.ASCII.GetBytes(initVector)
Dim saltValueBytes As Byte()
saltValueBytes = Encoding.ASCII.GetBytes(saltValue)
Dim plainTextBytes As Byte()
plainTextBytes = Encoding.UTF8.GetBytes(plainText)
Dim password As PasswordDeriveBytes
password = New PasswordDeriveBytes(passPhrase, _
saltValueBytes, _
hashAlgorithm, _
passwordIterations)
Dim keyBytes As Byte()
keyBytes = password.GetBytes(keySize / 8)
Dim symmetricKey As RijndaelManaged
symmetricKey = New RijndaelManaged
symmetricKey.Mode = CipherMode.CBC
Dim encryptor As ICryptoTransform
encryptor = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes)
Dim memoryStream As MemoryStream
memoryStream = New MemoryStream
Dim cryptoStream As CryptoStream
cryptoStream = New CryptoStream(memoryStream, _
encryptor, _
CryptoStreamMode.Write)
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length)
cryptoStream.FlushFinalBlock()
Dim cipherTextBytes As Byte()
cipherTextBytes = memoryStream.ToArray()
memoryStream.Close()
cryptoStream.Close()
Dim cipherText As String
cipherText = Convert.ToBase64String(cipherTextBytes)
cipherText = cipherText.Replace("+", "~")
Encrypt = cipherText
End Function
Public Function Encrypt(ByVal Data As String)
Try
Return Encrypt(Data, _
passPhrase, _
saltValue, _
hashAlgorithm, _
passwordIterations, _
initVector, _
keySize)
Catch ex As Exception
Throw ex
End Try
End Function
Private Function Decrypt(ByVal cipherText As String, _
ByVal passPhrase As String, _
ByVal saltValue As String, _
ByVal hashAlgorithm As String, _
ByVal passwordIterations As Integer, _
ByVal initVector As String, _
ByVal keySize As Integer) _
As String
cipherText = cipherText.Replace("~", "+")
Dim initVectorBytes As Byte()
initVectorBytes = Encoding.ASCII.GetBytes(initVector)
Dim saltValueBytes As Byte()
saltValueBytes = Encoding.ASCII.GetBytes(saltValue)
Dim cipherTextBytes As Byte()
cipherTextBytes = Convert.FromBase64String(cipherText)
Dim password As PasswordDeriveBytes
password = New PasswordDeriveBytes(passPhrase, _
saltValueBytes, _
hashAlgorithm, _
passwordIterations)
Dim keyBytes As Byte()
keyBytes = password.GetBytes(keySize / 8)
Dim symmetricKey As RijndaelManaged
symmetricKey = New RijndaelManaged
symmetricKey.Mode = CipherMode.CBC
Dim decryptor As ICryptoTransform
decryptor = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes)
Dim memoryStream As MemoryStream
memoryStream = New MemoryStream(cipherTextBytes)
Dim cryptoStream As CryptoStream
cryptoStream = New CryptoStream(memoryStream, _
decryptor, _
CryptoStreamMode.Read)
Dim plainTextBytes As Byte()
ReDim plainTextBytes(cipherTextBytes.Length)
Dim decryptedByteCount As Integer
decryptedByteCount = cryptoStream.Read(plainTextBytes, _
0, _
plainTextBytes.Length)
memoryStream.Close()
cryptoStream.Close()
Dim plainText As String
plainText = Encoding.UTF8.GetString(plainTextBytes, _
0, _
decryptedByteCount)
Decrypt = plainText
End Function
Public Function Decrypt(ByVal Data As String) As String
Try
Return Decrypt(Data, _
passPhrase, _
saltValue, _
hashAlgorithm, _
passwordIterations, _
initVector, _
keySize)
Catch ex As Exception
Throw ex
End Try
End Function
End Class