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Provider keys() method in Java
An enumeration of the keys of the required hash table can be obtained using the keys() method in the class java.security.Provider. This method requires no parameters and it returns the enumeration of the keys of the hash table.
A program that demonstrates this is given as follows −
Example
import java.security.*;
import java.util.*;
public class Demo {
public static void main(String[] argv) throws Exception {
try {
Signature sign = Signature.getInstance("DSA");
Provider p = sign.getProvider();
Enumeration<Object> enumeration = p.keys();
System.out.println("The enumeration of the keys is as follows:
");
int x = 30;
while (x > 0) {
System.out.println(enumeration.nextElement());
x--;
}
} catch (NoSuchAlgorithmException e) {
System.out.println("Error!!! NoSuchAlgorithmException");
}
}
}Output
The enumeration of the keys is as follows: Alg.Alias.Signature.SHA1/DSA Alg.Alias.Signature.1.2.840.10040.4.3 Alg.Alias.Signature.DSS SecureRandom.SHA1PRNG ImplementedIn KeyStore.JKS Alg.Alias.MessageDigest.SHA-1 MessageDigest.SHA KeyStore.CaseExactJKS CertStore.com.sun.security.IndexedCollection ImplementedIn Signature.SHA256withDSA Alg.Alias.MessageDigest.OID.1.3.14.3.2.26 Alg.Alias.Signature.DSA KeyFactory.DSA ImplementedIn KeyStore.JKS ImplementedIn AlgorithmParameters.DSA ImplementedIn Signature.NONEwithDSA Alg.Alias.CertificateFactory.X509 Signature.SHA256withDSA SupportedKeyClasses CertStore.com.sun.security.IndexedCollection Provider.id className Alg.Alias.MessageDigest.1.3.14.3.2.26 Alg.Alias.Signature.SHA-1/DSA KeyStore.DKS CertificateFactory.X.509 ImplementedIn Alg.Alias.Signature.OID.2.16.840.1.101.3.4.3.2 Alg.Alias.Signature.OID.2.16.840.1.101.3.4.3.1 Signature.SHA1withDSA KeySize Signature.NONEwithDSA KeySize CertPathValidator.PKIX ImplementedIn KeyFactory.DSA
Updated on: 30-Jul-2019
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