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String to sha-512, base64

Hi,

 

When trying to connect to an API I have to convert a string to SHA-512. I found a similar question here: https://www.talendforge.org/forum/viewtopic.php?id=47597

Although I am not used to java coding, I did get that routine working. It seems the routine is not entirely applicable because my output string is different from the output string the API manual says I should have:

 

The documentation provides this example string:

MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAOUspRHGNhIMnZ6say4k3swVMfKER8UYbVOREqq7t71VL89bagEFZW4rSjkTcBg7fVZCWX5ijgQVEX4xfV5lapcCAwEAAQ==GET/authefec3dc1-9a99-4825-9e09-3e7772fc205d1456823909

 

The documentation says the output string should be:

RK+xg4V0hfgKs27ORFA2mVkXhYIX14zRH/f5bl6KqZB8zxJNgDpC6yHVIlN0uPuDXsR0cfdU9jAM1GdG7yzUSg==

 

The instruction says: "When extracting the byte array from the string, UTF8 decoding should be used. The SHA512 hash should be Base64 encoded."  Probably I need to adjust the routine to decode/encode correctly based on this instruction, I don't know how to apply the necessary changes.

 

My question: Does anyone get the output string above, if so, how did you succeed?

 

Thank you

 

EDIT: edited the title and first sentence because it said SHA-256 instead of SHA-512

PS: I do see the correct output when testing the string on this page: http://approsto.com/sha-generator/ the correct output is show in field 'SHA512 base64 hash'

Tags (3)
1 ACCEPTED SOLUTION

Accepted Solutions
Five Stars

Re: String to sha-512, base64

Update: first I managed to get a hex hash, with this code below. 

 

	public static String getHashCodeFromString(String str) throws NoSuchAlgorithmException {
	    MessageDigest md = MessageDigest.getInstance("SHA-512");
	    md.update(str.getBytes());
	    byte byteData[] = md.digest();

	    //convert the byte to hex format method 1
	    StringBuffer hashCodeBuffer = new StringBuffer();
	    for (int i = 0; i < byteData.length; i++) {
	        hashCodeBuffer.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
	    }
	    return hashCodeBuffer.toString();
	}

What I needed is base64. I changed the code above, to the final code below, which gave me the expected result:

 

package routines;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import sun.misc.BASE64Encoder;
public class MyRoutineStringToSHA512test7 {

	public static String getHashCodeFromString(String str) throws NoSuchAlgorithmException {
	    MessageDigest md = MessageDigest.getInstance("SHA-512");
	    md.update(str.getBytes());
	    byte byteData[] = md.digest();

	    String hashCodeBuffer = (new BASE64Encoder()).encode(byteData);
	    return hashCodeBuffer.toString();
	}
}
1 REPLY
Five Stars

Re: String to sha-512, base64

Update: first I managed to get a hex hash, with this code below. 

 

	public static String getHashCodeFromString(String str) throws NoSuchAlgorithmException {
	    MessageDigest md = MessageDigest.getInstance("SHA-512");
	    md.update(str.getBytes());
	    byte byteData[] = md.digest();

	    //convert the byte to hex format method 1
	    StringBuffer hashCodeBuffer = new StringBuffer();
	    for (int i = 0; i < byteData.length; i++) {
	        hashCodeBuffer.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
	    }
	    return hashCodeBuffer.toString();
	}

What I needed is base64. I changed the code above, to the final code below, which gave me the expected result:

 

package routines;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import sun.misc.BASE64Encoder;
public class MyRoutineStringToSHA512test7 {

	public static String getHashCodeFromString(String str) throws NoSuchAlgorithmException {
	    MessageDigest md = MessageDigest.getInstance("SHA-512");
	    md.update(str.getBytes());
	    byte byteData[] = md.digest();

	    String hashCodeBuffer = (new BASE64Encoder()).encode(byteData);
	    return hashCodeBuffer.toString();
	}
}