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-rw-r--r--modules/caddytls/connpolicy.go9
1 files changed, 8 insertions, 1 deletions
diff --git a/modules/caddytls/connpolicy.go b/modules/caddytls/connpolicy.go
index 4fd8112..30f7290 100644
--- a/modules/caddytls/connpolicy.go
+++ b/modules/caddytls/connpolicy.go
@@ -171,7 +171,14 @@ func (p *ConnectionPolicy) buildStandardTLSConfig(ctx caddy.Context) error {
// more at handshake-time, but I don't know how to practically pre-build
// a certmagic config for each combination of conn policy + automation policy...
cfg := *tlsApp.getConfigForName(hello.ServerName)
- cfg.CertSelection = p.CertSelection
+ if p.CertSelection != nil {
+ // you would think we could just set this whether or not
+ // p.CertSelection is nil, but that leads to panics if
+ // it is, because cfg.CertSelection is an interface,
+ // so it will have a non-nil value even if the actual
+ // value underlying it is nil (sigh)
+ cfg.CertSelection = p.CertSelection
+ }
cfg.DefaultServerName = p.DefaultSNI
return cfg.GetCertificate(hello)
},