MessageDigest getProvider() method in Java with Examples

The method getProvider() of java.security.MessageDigest class is used to get the provider of this message digest.

Syntax:

public final Provider getProvider()

Return Value: This method returns the provider of this MessageDigest.

Below are the examples to illustrate the getProvider() method:

Example 1: For AlgorithmMD5

// Java program to demonstrate
// getAlgorithm() method

import java.security.*;
import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
    {
        try {
            // creating object of MessageDigest
            MessageDigest msd
                = MessageDigest.getInstance("MD5");

            // getting provider used in object msd
            // using getAlgorithm() method
            Provider pro = msd.getProvider();

            // display the provider
            System.out.println("Provider : " + pro);
        }

        catch (NoSuchAlgorithmException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ProviderException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

Provider : SUN version 1.8

Example 2: For Algorithm SHA-256

// Java program to demonstrate
// getAlgorithm() method

import java.security.*;
import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
    {
        try {
            // creating object of MessageDigest
            MessageDigest msd
                = MessageDigest.getInstance("SHA-256");

            // getting provider used in object msd
            // using getAlgorithm() method
            Provider pro = msd.getProvider();

            // display the provider
            System.out.println("Provider : " + pro);
        }

        catch (NoSuchAlgorithmException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ProviderException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

Provider : SUN version 1.8

Reference: https://docs.oracle.com/javase/9/docs/api/java/security/MessageDigest.html#getAlgorithm–