Android 取得 public key(RSA key)

private final PackageManager packageManager = context.getPackageManager();

private final List<PackageInfo> packageList = packageManager.getInstalledPackages(PackageManager.GET_SIGNATURES);

for (PackageInfo p : packageList) {

    for (final Signature sig : p.signatures) {

        X509Certificate x509Cert;

        try {

            x509Cert = (X509Certificate) CertificateFactory.getInstance("X509")

            .generateCertificate(new ByteArrayInputStream(sig.toByteArray()));

           

           Log.i("msg","Public Key:"+ x509Cert.getPublicKey().toString());

        }

        catch (CertificateException e) {

            e.printStackTrace();

        }

    }

}

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