How does one create a java.security.cert.X509Certificate instance from a PEM-formatted String? The PEM-formatted String is a HTTP request "SSL_CLIENT_CERT" header value.

ANSWER: Based on mgaert's answer, here's what I wrote in Scala:

val cert = factory.generateCertificate(
    new ByteArrayInputStream(
      Base64.decodeBase64(
        cert.stripPrefix("-----BEGIN CERTIFICATE-----").stripSuffix("-----END CERTIFICATE-----")
      )
    ).asInstanceOf[X509Certificate]
java ssl x509certificate
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