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
// getProvider() 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 getProvider() 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
// getProvider() 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 getProvider() 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--