Merge "Handle unparsable public keys"

import java.security.Security;

import java.security.Signature;

import java.security.UnrecoverableKeyException;

import java.security.cert.X509Certificate;

import java.security.interfaces.ECPublicKey;

import java.security.interfaces.RSAPublicKey;

        }

        final byte[] x509PublicCert = metadata.certificate;

        PublicKey publicKey = AndroidKeyStoreSpi.toCertificate(x509PublicCert).getPublicKey();

        final X509Certificate parsedX509Certificate =

                AndroidKeyStoreSpi.toCertificate(x509PublicCert);

        if (parsedX509Certificate == null) {

            throw new UnrecoverableKeyException("Failed to parse the X.509 certificate containing"

                   + " the public key. This likely indicates a hardware problem.");

        }

        PublicKey publicKey = parsedX509Certificate.getPublicKey();

        String jcaKeyAlgorithm = publicKey.getAlgorithm();