Fix linter errors

authority/provisioner/x5c.go

@@ -100,6 +100,7 @@ func (p *X5C) Init(config Config) (err error) {
 	var (
 		block *pem.Block
 		rest  = p.Roots
+		count int
 	)
 	for rest != nil {
 		block, rest = pem.Decode(rest)
@@ -110,11 +111,12 @@ func (p *X5C) Init(config Config) (err error) {
 		if err != nil {
 			return errors.Wrap(err, "error parsing x509 certificate from PEM block")
 		}
+		count++
 		p.rootPool.AddCert(cert)
 	}
 
 	// Verify that at least one root was found.
-	if len(p.rootPool.Subjects()) == 0 {
+	if count == 0 {
 		return errors.Errorf("no x509 certificates found in roots attribute for provisioner '%s'", p.GetName())
 	}
 

authority/provisioner/x5c_test.go

@@ -118,6 +118,8 @@ M46l92gdOozT
 			return ProvisionerValidateTest{
 				p: p,
 				extraValid: func(p *X5C) error {
+					// nolint:staticcheck // We don't have a different way to
+					// check the number of certificates in the pool.
 					numCerts := len(p.rootPool.Subjects())
 					if numCerts != 2 {
 						return errors.Errorf("unexpected number of certs: want 2, but got %d", numCerts)

ca/ca.go

@@ -450,9 +450,6 @@ func (ca *CA) getTLSConfig(auth *authority.Authority) (*tls.Config, error) {
 	tlsConfig.ClientAuth = tls.VerifyClientCertIfGiven
 	tlsConfig.ClientCAs = certPool
 
-	// Use server's most preferred ciphersuite
-	tlsConfig.PreferServerCipherSuites = true
-
 	return tlsConfig, nil
 }
 

ca/identity/client_test.go

@@ -8,6 +8,7 @@ import (
 	"net/url"
 	"os"
 	"reflect"
+	"sort"
 	"testing"
 )
 
@@ -196,7 +197,7 @@ func TestLoadClient(t *testing.T) {
 				switch {
 				case gotTransport.TLSClientConfig.GetClientCertificate == nil:
 					t.Error("LoadClient() transport does not define GetClientCertificate")
-				case !reflect.DeepEqual(got.CaURL, tt.want.CaURL) || !reflect.DeepEqual(gotTransport.TLSClientConfig.RootCAs.Subjects(), wantTransport.TLSClientConfig.RootCAs.Subjects()):
+				case !reflect.DeepEqual(got.CaURL, tt.want.CaURL) || !equalPools(gotTransport.TLSClientConfig.RootCAs, wantTransport.TLSClientConfig.RootCAs):
 					t.Errorf("LoadClient() = %#v, want %#v", got, tt.want)
 				default:
 					crt, err := gotTransport.TLSClientConfig.GetClientCertificate(nil)
@@ -238,3 +239,23 @@ func Test_defaultsConfig_Validate(t *testing.T) {
 		})
 	}
 }
+
+// nolint:staticcheck,gocritic
+func equalPools(a, b *x509.CertPool) bool {
+	if reflect.DeepEqual(a, b) {
+		return true
+	}
+	subjects := a.Subjects()
+	sA := make([]string, len(subjects))
+	for i := range subjects {
+		sA[i] = string(subjects[i])
+	}
+	subjects = b.Subjects()
+	sB := make([]string, len(subjects))
+	for i := range subjects {
+		sB[i] = string(subjects[i])
+	}
+	sort.Strings(sA)
+	sort.Strings(sB)
+	return reflect.DeepEqual(sA, sB)
+}

ca/identity/identity_test.go

@@ -346,6 +346,8 @@ func TestIdentity_GetCertPool(t *testing.T) {
 				return
 			}
 			if got != nil {
+				// nolint:staticcheck // we don't have a different way to check
+				// the certificates in the pool.
 				subjects := got.Subjects()
 				if !reflect.DeepEqual(subjects, tt.wantSubjects) {
 					t.Errorf("Identity.GetCertPool() = %x, want %x", subjects, tt.wantSubjects)

ca/tls.go

@@ -95,7 +95,6 @@ func (c *Client) getClientTLSConfig(ctx context.Context, sign *api.SignResponse,
 	// Note that with GetClientCertificate tlsConfig.Certificates is not used.
 	// Without tlsConfig.Certificates there's not need to use tlsConfig.BuildNameToCertificate()
 	tlsConfig.GetClientCertificate = renewer.GetClientCertificate
-	tlsConfig.PreferServerCipherSuites = true
 
 	// Apply options and initialize mutable tls.Config
 	tlsCtx := newTLSOptionCtx(c, tlsConfig, sign)
@@ -137,7 +136,6 @@ func (c *Client) GetServerTLSConfig(ctx context.Context, sign *api.SignResponse,
 	// Without tlsConfig.Certificates there's not need to use tlsConfig.BuildNameToCertificate()
 	tlsConfig.GetCertificate = renewer.GetCertificate
 	tlsConfig.GetClientCertificate = renewer.GetClientCertificate
-	tlsConfig.PreferServerCipherSuites = true
 	tlsConfig.ClientAuth = tls.RequireAndVerifyClientCert
 
 	// Apply options and initialize mutable tls.Config

ca/tls_options_test.go

@@ -542,6 +542,7 @@ func TestAddFederationToCAs(t *testing.T) {
 	}
 }
 
+// nolint:staticcheck,gocritic
 func equalPools(a, b *x509.CertPool) bool {
 	if reflect.DeepEqual(a, b) {
 		return true