How can we encrypt column value in talend Please help

[Anonymous]

Hi Team,
I need to encrypt particular attribute value .. how  can we achive this through talend .Please help me
Regards
Mohini Sharrmaa M

[Anonymous]

You can do this with a bit of Java in a tMap. Create a routine to encrypt your data (there are lots of examples here http://www.example-code.com/java/encryption.asp) and use the routine in a tMap. 

[Anonymous]

Could you please give me the code if possible or function which I can use to call routine in tmap
thanks in Advance
Mohini

[Anonymous]

First you need to create your routine. An example of a routine for encryption can be seen below (it's been a while since I wrote this and I am not certain it works)....

package routines;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SignatureException;
import java.util.Formatter;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

public class EncryptionUtilities {
	
	private static final String HMAC_SHA1_ALGORITHM = "HmacSHA1";
	 
	private static String toHexString(byte[] bytes) {
		Formatter formatter = new Formatter();
		
		for (byte b : bytes) {
			formatter.format("%02x", b);
		}
 
		return formatter.toString();
	}
 
	public static String calculateRFC2104HMAC(String data, String key)
		throws SignatureException, NoSuchAlgorithmException, InvalidKeyException
	{
		SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(), HMAC_SHA1_ALGORITHM);
		Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);
		mac.init(signingKey);
		return toHexString(mac.doFinal(data.getBytes()));
	}
 
}

To call this in the tMap you simply use the code.....

routines.EncryptionUtilities.calculateRFC2104HMAC(row1.data, "myKey")

....in the column you want to encrypt.
Please note that this is not meant for you to copy (you can, but it will need testing since it is a bit of code I quickly found on my machine), but as an example of how to do this.

[Anonymous]

thank you so much

[swambulkar]

Is there decrypt method to allow for decryption of processed data set when needed?

[Jesperrekuh]

@mbocquet
Brute force.... or something really smart...
SHA stands for Secure Hash.
So SHA1 and MD5 aren't encryption algorythms, these are hashing and one way only.