Trying to create java class which will encrypt and decrypt as like C# code in below.
Below is my code for C#, I need to convert it to Java. Can someone help me how to do it?
I've been doing this for almost 2 days yet can't find any solutions on how to convert it. I am new to crypto.
Note - It seems C# code used ACME libraries. But in my java, i should not use ACME jar files.
public static string EncryptBase64(string key, string clearText)
{
if (key.Length > 8)
key = key.Substring(0, 8);
byte[] keyBytes = System.Text.Encoding.ASCII.GetBytes(key);
byte[] clearBytes = GetClearTextBytes(clearText);
// calculate the number of legitimate bytes in the last block
byte lastByte = (byte)(8 - (clearBytes.Length - textEncoding.GetByteCount(clearText)));
MemoryStream ms = new MemoryStream();
DES des = new DESCryptoServiceProvider();
des.Padding = PaddingMode.None;
des.GenerateIV();
System.Security.Cryptography.ICryptoTransform ict = des.CreateEncryptor(keyBytes, des.IV);
CryptoStream cs = new CryptoStream(ms, ict, CryptoStreamMode.Write);
cs.Write(clearBytes, 0, clearBytes.Length);
cs.FlushFinalBlock();
ms.Close();
byte[] cipherBytes = ms.ToArray();
// create a byte output stream for Acme compatibality
MemoryStream acmeCompatStream = new MemoryStream();
// Acme writes the IV to the frist block
acmeCompatStream.Write(des.IV, 0, 8);
for (int i = 0; i < cipherBytes.Length; i = i + 8)
{
// write the next block
acmeCompatStream.Write(cipherBytes, i, 8);
// write the number of valid bytes in the block
if (i == cipherBytes.Length - 8)
acmeCompatStream.WriteByte(lastByte);
else
acmeCompatStream.WriteByte(8);
}
acmeCompatStream.Close();
cipherBytes = acmeCompatStream.ToArray();
return (System.Convert.ToBase64String(cipherBytes));
}
Below is the code which i have tried in java. I have two different encryption function. I have tried both of the encryption method. But both are not giving expected encrypted string to decrypt in acme.
package com.abc.some.common.nativeDES;
import java.io.ByteArrayOutputStream;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
import javax.xml.bind.DatatypeConverter;
public class DESEncrypt {
public String keyValue = "123456789";
public static void main(String[] args) {
String text = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><SomeRequest><OrderNumber>1564578</OrderNumber></SomeRequest>";
String codedtext ="not encrypted";
try{
codedtext = new DESEncrypt().Encrypt1(text);
//codedtext = new DESEncrypt().encrypt(text);
}catch (Exception e) {
System.out.println("Exception in Encryption.. " + e.getMessage());
}
System.out.println(codedtext);
}
public String Encrypt1(String CXML) {
try {
KeySpec myKey = new DESKeySpec(keyValue.getBytes("UTF8"));
SecretKey key = SecretKeyFactory.getInstance("DES").generateSecret(myKey);
Cipher ecipher = Cipher.getInstance("DES");
ecipher.init(Cipher.ENCRYPT_MODE, key);
byte[] data = CXML.getBytes("ASCII");
Cipher c = Cipher.getInstance("DES/CBC/PKCS5Padding");
c.init(Cipher.ENCRYPT_MODE, key);
byte[] crypt = ecipher.doFinal(data);
//String encoded = DatatypeConverter.printBase64Binary(crypt.toString().getBytes("ASCII"));
//String encoded = DatatypeConverter.printBase64Binary(crypt.getBytes("ASCII"));
String encoded = DatatypeConverter.printBase64Binary(crypt).toString();
System.out.println(encoded);
return encoded;
} catch (Exception ex) {
}
return null;
}
}
But I have used below java file to encrypt the string which is using acme jar files. This was working as expected. But as per my project requirement i should not use the external(ACME) jar files.
package com.abc.common.encryption;
import java.io.FileInputStream;
import java.util.Properties;
import Acme.Crypto.SecurityDES;
public class ESBCryptoDES {
public static void main(String args[]){
// DESEncrypt("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><SomeRequest><OrderNumber>1564578</OrderNumber></SomeRequest>"
// ,"D:\\name\\proj\\order\\Encryption\\st.properties");
DESDecrypt("vQ9C7ZrLzjQpHvZjtHvUb0mFCr824/aClY2jKbeciczsRVr+kEETFvDuHgdBS/aLskYV3WX3U5TANSlK3pH80r3xOyn9Q8rTjlB/yXyU7J9MgibJ66jJx0wrqeloAkmQzqj+b5+I/lXANSlK3pH80kT1D+jqWAeV"
,"D:\\name\\proj\\order\\Encryption\\stDecrypt.properties");
}
public static String DESEncrypt(String SourceStrForCrypt,String PropPath) {
String encrypt = "";
String decrypt = "";
// Load the property file.
Properties prop = new Properties();
try {
FileInputStream in = new FileInputStream(PropPath);
prop.load(in);
in.close();
} catch (Exception e) {
System.out.println("Exception in loading property file.. "
+ e.getMessage());
}
// Encrypt the given content.
try {
String keypath = prop.getProperty("proj.sample.DEV");
System.out.println("sample" + keypath);
String SourceToEncrypt = SourceStrForCrypt; //This will provide the xml string to encrypt
// Encryption
encrypt = SecurityDES.DesEncryptBase64(keypath,SourceToEncrypt);
System.out.println(encrypt);
// Decryption
decrypt = SecurityDES.DesDecryptBase64(keypath, encrypt);
System.out.println(decrypt);
} catch (Exception e) {
System.out.println("Exception in Encryption.. " + e.getMessage());
}
return encrypt;
}
public static String DESDecrypt(String SourceStrForCrypt,String PropPath) {
// TODO Auto-generated method stub
String decrypt = "";
Properties prop = new Properties();
try {
FileInputStream in = new FileInputStream(PropPath);
prop.load(in);
in.close();
} catch (Exception e) {
System.out.println("Exception in loading property file.. "+ e.getMessage());
}
try {
String abc_keyPath = prop
.getProperty("proj.abc.DEV");
System.out.println("keypath" + abc_keyPath);
// Decryption
decrypt = SecurityDES.DesDecryptBase64(abc_keyPath, SourceStrForCrypt);
System.out.println("decrypted..."+decrypt);
} catch (Exception e) {
System.out.println("Exception in Encryption.. " + e.getMessage());
}
return decrypt;
}
}
