Write x509 certificate into PEM formatted string in java?

Question

Is there some high level way to write an X509Certificate into a PEM formatted string? Currently I\'m doing x509cert.encode() to write it into a DER formatted string, then ba

Answer 1

If you have PEMWriter from bouncy castle, then you can do the following :

Imports :

import org.bouncycastle.openssl.PEMWriter;

Code :

/**
 * Converts a {@link X509Certificate} instance into a Base-64 encoded string (PEM format).
 *
 * @param x509Cert A X509 Certificate instance
 * @return PEM formatted String
 * @throws CertificateEncodingException
 */
public String convertToBase64PEMString(Certificate x509Cert) throws IOException {
    StringWriter sw = new StringWriter();
    try (PEMWriter pw = new PEMWriter(sw)) {
        pw.writeObject(x509Cert);
    }
    return sw.toString();
}