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Parsing the issuerDN / subjectDN in an SSL (X.509) certificate in Scala

cert.getIssuerDN.getName
cert.getIssuerDN

You’ll get values like this:

CN = COMODO ECC Domain Validation Secure Server CA 2
O = COMODO CA Limited
L = Salford
S = Greater Manchester
C = GB

There are several possible fields that can show up here, and I don’t believe the order is guaranteed. This format comes from LDAP / Active Directory, and is helpfully called “Distinguished Names“.

You can parse these in scala like so:

val issuer = new LdapName(cert.getIssuerDN.toString)
val issuerDN = issuer.getAll()

val issuerDNValues =
  Iterator
    .continually(
      () => {
        issuerDN.nextElement.split("=")
      }
    )
    .takeWhile(_ => issuerDN.hasMoreElements)