CODEWITHSUNDEEP
javasecuritydigital-signaturesignaturecryptocurrency
MihaelaC
MihaelaC

Reputation: 1

java.security.NoSuchAlgorithmException: Ed25519 KeyPairGenerator not available

I have been tried to use the EdDSA algorithm in order to generate keys using jar eddsa 0.3.0. However, I get java.security.NoSuchAlgorithmException: Ed25519 KeyPairGenerator not available when I try to do KeyPairGenerator.getInstance("Ed25519");

Also, I have the following exception java.security.NoSuchAlgorithmException: Ed25519 Signature not available when I try to generate signatures. Are there any examples of how to make it work?

I've done the research but I am new to the encryption phase and I don't really get how I should make it work.

I known that the eddsaparam constructor is wrong. The code below:

KeyPairGenerator keyPairGenerator=KeyPairGenerator.getInstance("EdDSA");//getInstance("ECDSA","BC");//EDDSA
            SecureRandom secureRandom=SecureRandom.getInstance("SHA1PRNG");

            EdDSANamedCurveSpec ed25519 = EdDSANamedCurveTable.getByName("Ed25519");

            EdDSAParameterSpec edDSAParameterSpec = new EdDSAParameterSpec(ed25519, "Ed25519");

            keyPairGenerator.initialize(edDSAParameterSpec,secureRandom);

Upvotes: 0

Views: 3899

Answers (1)

Kristof Neirynck
Kristof Neirynck

Reputation: 4162

I'm affraid that "Ed25519" is a typo and it should be "EdDSA".

Assuming your pom file contains this:

<dependency>
    <groupId>net.i2p.crypto</groupId>
    <artifactId>eddsa</artifactId>
    <version>0.3.0</version>
</dependency>

And your code resembles this:

import net.i2p.crypto.eddsa.EdDSASecurityProvider;

import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;

public class App {
    public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchProviderException {
        // throws NoSuchAlgorithmException: EdDSA KeyPairGenerator not available
        //KeyPairGenerator.getInstance("EdDSA");

        // add eddsa to the security providers
        Security.addProvider(new EdDSASecurityProvider());

        // throws: NoSuchAlgorithmException: Ed25519 KeyPairGenerator not available
        //KeyPairGenerator.getInstance("Ed25519");

        // throws: NoSuchAlgorithmException: no such algorithm: Ed25519 for provider EdDSA
        //KeyPairGenerator.getInstance("Ed25519", "EdDSA");

        // works
        KeyPairGenerator.getInstance("EdDSA", "EdDSA");

        // also works
        KeyPairGenerator.getInstance("EdDSA");
    }
}

Upvotes: 2

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