How can I construct a java.security.PublicKey object from a base64 encoded string?

Question

I have a bse64encoded string Public key from external source (Android Store) and I need to use it to verify signed content. How can I convert the string into an instance of

Answer 1

you can try this solution:

add this dependency:

org.bouncycastle
bcpkix-jdk15on
1.61

and use this method:

private Key parsePublicKey(String publicKey) throws IOException {
    PEMParser pemParser = new PEMParser(new StringReader(publicKey));
    JcaPEMKeyConverter converter = new JcaPEMKeyConverter();
    SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfo.getInstance(pemParser.readObject());
    return converter.getPublicKey(publicKeyInfo);
}