89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
package tls
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import (
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ctls "crypto/tls"
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"github.com/coredns/caddy"
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"github.com/coredns/coredns/core/dnsserver"
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"github.com/coredns/coredns/plugin"
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"github.com/coredns/coredns/plugin/pkg/tls"
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)
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func init() { plugin.Register("tls", setup) }
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func setup(c *caddy.Controller) error {
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err := parseTLS(c)
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if err != nil {
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return plugin.Error("tls", err)
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}
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return nil
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}
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func setTLSDefaults(tls *ctls.Config) {
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tls.MinVersion = ctls.VersionTLS12
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tls.MaxVersion = ctls.VersionTLS13
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tls.CipherSuites = []uint16{
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ctls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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ctls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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ctls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
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ctls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
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ctls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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ctls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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ctls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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ctls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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ctls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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}
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}
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func parseTLS(c *caddy.Controller) error {
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config := dnsserver.GetConfig(c)
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if config.TLSConfig != nil {
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return plugin.Error("tls", c.Errf("TLS already configured for this server instance"))
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}
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for c.Next() {
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args := c.RemainingArgs()
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if len(args) < 2 || len(args) > 3 {
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return plugin.Error("tls", c.ArgErr())
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}
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clientAuth := ctls.NoClientCert
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for c.NextBlock() {
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switch c.Val() {
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case "client_auth":
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authTypeArgs := c.RemainingArgs()
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if len(authTypeArgs) != 1 {
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return c.ArgErr()
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}
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switch authTypeArgs[0] {
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case "nocert":
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clientAuth = ctls.NoClientCert
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case "request":
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clientAuth = ctls.RequestClientCert
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case "require":
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clientAuth = ctls.RequireAnyClientCert
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case "verify_if_given":
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clientAuth = ctls.VerifyClientCertIfGiven
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case "require_and_verify":
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clientAuth = ctls.RequireAndVerifyClientCert
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default:
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return c.Errf("unknown authentication type '%s'", authTypeArgs[0])
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}
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default:
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return c.Errf("unknown option '%s'", c.Val())
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}
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}
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tls, err := tls.NewTLSConfigFromArgs(args...)
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if err != nil {
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return err
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}
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tls.ClientAuth = clientAuth
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// NewTLSConfigFromArgs only sets RootCAs, so we need to let ClientCAs refer to it.
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tls.ClientCAs = tls.RootCAs
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setTLSDefaults(tls)
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config.TLSConfig = tls
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}
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return nil
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}
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