Iam using TripleDes /cbc/pkcs7padding in C#.net to encrypt file. and i need to decrypt in java.In java am using DESede/CBC/PKcs5padding But the file is decrypted,but corrupted.
*In java is it possible to use pkcs7padding? or any other solution to decrypt the file in java with encrypted using pkcs7 padding
C# code
namespace EncryptEpubFiles { public class Encryptor { public static bool EncryptBook(FileInfo fileToEncrypt,string outPathWithoutExtension,string keyString) { try { byte[] encryptedFileByteArray; //Start Encryption service provider TripleDESCryptoServiceProvider tDES = new TripleDESCryptoServiceProvider(); //Read all bytes from input file byte[] _fileByteArray = File.ReadAllBytes(fileToEncrypt.FullName); tDES.Key = GetBytes(keyString); tDES.Mode = CipherMode.CBC; //tDES.Padding = PaddingMode.PKCS7; tDES.Padding = PaddingMode.PKCS7; ICryptoTransform trans = tDES.CreateEncryptor(); //Create Encrypted file byte array encryptedFileByteArray = (trans.TransformFinalBlock(_fileByteArray, 0, ((_fileByteArray).Length))); //Write Encrypted file byte array to a filr with proper extension System.IO.File.WriteAllBytes((outPathWithoutExtension + ".akr"), encryptedFileByteArray); return true; } catch (Exception ex) { return false; } } Java code
public class DecryptFinal { private static Cipher dcipher; private static byte[] iv = { (byte)0xB2, (byte)0x12, (byte)0xD5, (byte)0xB2, (byte)0x44, (byte)0x21, (byte)0xC3, (byte)0xC3 }; public static void main(String[] args){ try { String s = "123456789123456789111234"; AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv); SecretKeyFactory keyfactory=SecretKeyFactory.getInstance("DESede"); byte[] encodedkey=s.getBytes(); System.out.println(); SecretKey key = keyfactory.generateSecret(new DESedeKeySpec(encodedkey)); System.out.println(new DESedeKeySpec(encodedkey)); SecretKeySpec(encodedKey,0,encodedKey.length,"DESede" ); dcipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec); FileInputStream fs =new FileInputStream("E:\\Test1\\Test1\\Encrypted Files\\Wedding bells.akr"); FileOutputStream os= new FileOutputStream("E:\\Test1\\Test1\\Encrypted Files\\Encrypted Files\\E-pub Totorials"); byte[] buf = new byte[1024];// bytes read from stream will be decrypted CipherInputStream cis = new CipherInputStream(fs, dcipher);// read in the decrypted bytes and write the clear text to out int numRead = 0; while ((numRead = cis.read(buf)) >= 0) { os.write(buf, 0, numRead); } cis.close();// close all streams fs.close(); os.close(); } catch(FileNotFoundException e) { System.out.println("File Not Found:" + e.getMessage()); return; } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvalidKeyException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvalidAlgorithmParameterException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { System.out.println("I/O Error:" + e.getMessage()); } catch (InvalidKeySpecException e) { // TODO: handle exception e.printStackTrace(); }