pjfanning commented on code in PR #3528:
URL: https://github.com/apache/pekko/pull/3528#discussion_r3943857106
##########
remote/src/main/scala/org/apache/pekko/remote/artery/tcp/ssl/PemManagersProvider.scala:
##########
@@ -90,4 +93,46 @@ private[ssl] object PemManagersProvider {
certFactory.generateCertificate(Files.newInputStream(new
File(filename).toPath))
}
+ /**
+ * Loads every certificate found in the given PEM file. A file may bundle
more than one
+ * certificate, e.g. a root CA together with the intermediates it delegates
to, or several
+ * roots while a CA is being rotated.
+ *
+ * INTERNAL API
+ */
+ @InternalApi
+ private[ssl] def loadCertificates(filename: String): Seq[Certificate] =
blocking {
+ val stream = Files.newInputStream(new File(filename).toPath)
+ try certFactory.generateCertificates(stream).asScala.toList
+ finally stream.close()
+ }
+
+ private def caCertAlias(idx: Int): String = if (idx == 0) "cacert" else
s"cacert-$idx"
+
+ /**
+ * Builds the certificate chain to present during the handshake: `cert`
followed by the
+ * certificates from `cacerts` that actually issued it, ordered from the
issuer of `cert` up
+ * to the root. Certificates in `cacerts` that are not part of that chain
(an unrelated root
+ * kept around for a CA rotation, say) are trusted but not sent to the peer.
+ *
+ * Falls back to sending all of `cacerts` when none of them matches the
issuer of `cert`, which
+ * keeps the behaviour of a single, non-matching CA certificate unchanged.
+ */
+ private def buildCertificateChain(cert: X509Certificate, cacerts:
Seq[Certificate]): Array[Certificate] = {
+ val bySubject: Map[X500Principal, X509Certificate] =
Review Comment:
I'll look into adding test coverage in this area and seeing which solution
makes most sense
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