Method writeKeyPairToFile

src/main/java/com/trsst/Command.java:1123–1165

(KeyPair keyPair,
            X509Certificate cert, String alias, File file, char[] pwd)

    }

    public static final void writeKeyPairToFile(KeyPair keyPair,
            X509Certificate cert, String alias, File file, char[] pwd) {
        FileInputStream input = null;
        FileOutputStream output = null;
        try {
            KeyStore keyStore = KeyStore.getInstance("PKCS12");
            if (file.exists()) {
                input = new FileInputStream(file);
                keyStore.load(new FileInputStream(file), pwd);
                input.close();
            } else {
                keyStore.load(null); // weird but required
            }

            // save my private key
            keyStore.setKeyEntry(alias, keyPair.getPrivate(), pwd,
                    new X509Certificate[] { cert });

            // store away the keystore
            output = new java.io.FileOutputStream(file);
            keyStore.store(output, pwd);
            output.flush();
        } catch (Exception e) {
            log.error("Error while storing key: " + e.getMessage(), e);
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException e) {
                    // ignore while closing
                    log.trace("Error while closing: " + e.getMessage(), e);
                }
            }
            if (output != null) {
                try {
                    output.close();
                } catch (IOException e) {
                    // ignore while closing
                    log.trace("Error while closing: " + e.getMessage(), e);
                }
            }
        }
    }

    private static final X509Certificate createCertificate(KeyPair keyPair,
            String algorithm) {