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integration: re-overwrite "httptest.Server" TLS.Certificates

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Signed-off-by: Gyuho Lee <gyuhox@gmail.com>
This commit is contained in:
Gyuho Lee 2018-04-13 13:40:11 -07:00
parent 08dc184618
commit 78109152b9
1 changed files with 37 additions and 1 deletions
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38
integration/cluster.go
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@ -46,6 +46,7 @@ import (
"github.com/coreos/etcd/etcdserver/api/v3rpc"
pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
"github.com/coreos/etcd/pkg/testutil"
"github.com/coreos/etcd/pkg/tlsutil"
"github.com/coreos/etcd/pkg/transport"
"github.com/coreos/etcd/pkg/types"
"github.com/coreos/etcd/rafthttp"
@ -785,10 +786,45 @@ func (m *member) Launch() error {
if m.ClientTLSInfo == nil {
hs.Start()
} else {
hs.TLS, err = m.ClientTLSInfo.ServerConfig()
info := m.ClientTLSInfo
hs.TLS, err = info.ServerConfig()
if err != nil {
return err
}
// baseConfig is called on initial TLS handshake start.
//
// Previously,
// 1. Server has non-empty (*tls.Config).Certificates on client hello
// 2. Server calls (*tls.Config).GetCertificate iff:
// - Server's (*tls.Config).Certificates is not empty, or
// - Client supplies SNI; non-empty (*tls.ClientHelloInfo).ServerName
//
// When (*tls.Config).Certificates is always populated on initial handshake,
// client is expected to provide a valid matching SNI to pass the TLS
// verification, thus trigger server (*tls.Config).GetCertificate to reload
// TLS assets. However, a cert whose SAN field does not include domain names
// but only IP addresses, has empty (*tls.ClientHelloInfo).ServerName, thus
// it was never able to trigger TLS reload on initial handshake; first
// ceritifcate object was being used, never being updated.
//
// Now, (*tls.Config).Certificates is created empty on initial TLS client
// handshake, in order to trigger (*tls.Config).GetCertificate and populate
// rest of the certificates on every new TLS connection, even when client
// SNI is empty (e.g. cert only includes IPs).
//
// This introduces another problem with "httptest.Server":
// when server initial certificates are empty, certificates
// are overwritten by Go's internal test certs, which have
// different SAN fields (e.g. example.com). To work around,
// re-overwrite (*tls.Config).Certificates before starting
// test server.
tlsCert, err := tlsutil.NewCert(info.CertFile, info.KeyFile, nil)
if err != nil {
return err
}
hs.TLS.Certificates = []tls.Certificate{*tlsCert}
hs.StartTLS()
}
closer := func() {