snapshot of https://github.com/grpc/grpc-go.git (master, 2026-09-15; blobs > 131072B omitted)

internal/testutils/tls_creds.go

@@ -0,0 +1,156 @@
+/*
+ *
+ * Copyright 2024 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package testutils
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"os"
+	"testing"
+
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/testdata"
+)
+
+// CreateClientTLSCredentials creates client-side TLS transport credentials
+// using certificate and key files from testdata/x509 directory.
+func CreateClientTLSCredentials(t *testing.T) credentials.TransportCredentials {
+	t.Helper()
+
+	cert, err := tls.LoadX509KeyPair(testdata.Path("x509/client1_cert.pem"), testdata.Path("x509/client1_key.pem"))
+	if err != nil {
+		t.Fatalf("tls.LoadX509KeyPair(x509/client1_cert.pem, x509/client1_key.pem) failed: %v", err)
+	}
+	b, err := os.ReadFile(testdata.Path("x509/server_ca_cert.pem"))
+	if err != nil {
+		t.Fatalf("os.ReadFile(x509/server_ca_cert.pem) failed: %v", err)
+	}
+	roots := x509.NewCertPool()
+	if !roots.AppendCertsFromPEM(b) {
+		t.Fatal("Failed to append certificates")
+	}
+	return credentials.NewTLS(&tls.Config{
+		Certificates: []tls.Certificate{cert},
+		RootCAs:      roots,
+		ServerName:   "x.test.example.com",
+	})
+}
+
+// CreateServerTLSCredentials creates server-side TLS transport credentials
+// using certificate and key files from testdata/x509 directory.
+func CreateServerTLSCredentials(t *testing.T, clientAuth tls.ClientAuthType) credentials.TransportCredentials {
+	t.Helper()
+
+	cert, err := tls.LoadX509KeyPair(testdata.Path("x509/server1_cert.pem"), testdata.Path("x509/server1_key.pem"))
+	if err != nil {
+		t.Fatalf("tls.LoadX509KeyPair(x509/server1_cert.pem, x509/server1_key.pem) failed: %v", err)
+	}
+	b, err := os.ReadFile(testdata.Path("x509/client_ca_cert.pem"))
+	if err != nil {
+		t.Fatalf("os.ReadFile(x509/client_ca_cert.pem) failed: %v", err)
+	}
+	ca := x509.NewCertPool()
+	if !ca.AppendCertsFromPEM(b) {
+		t.Fatal("Failed to append certificates")
+	}
+	return credentials.NewTLS(&tls.Config{
+		ClientAuth:   clientAuth,
+		Certificates: []tls.Certificate{cert},
+		ClientCAs:    ca,
+	})
+}
+
+// CreateServerTLSCredentialsCompatibleWithSPIFFE creates server-side TLS
+// transport credentials using certificate and key files from the
+// testdata/spiffe_end2end directory. These credentials are compatible with the
+// SPIFFE trust bundles used on the client side.
+func CreateServerTLSCredentialsCompatibleWithSPIFFE(t *testing.T, clientAuth tls.ClientAuthType) credentials.TransportCredentials {
+	t.Helper()
+
+	cert, err := tls.LoadX509KeyPair(testdata.Path("spiffe_end2end/server_spiffe.pem"), testdata.Path("spiffe_end2end/server.key"))
+	if err != nil {
+		t.Fatalf("tls.LoadX509KeyPair(spiffe_end2end/server_spiffe.pem, spiffe_end2end/server.key) failed: %v", err)
+	}
+	b, err := os.ReadFile(testdata.Path("spiffe_end2end/ca.pem"))
+	if err != nil {
+		t.Fatalf("os.ReadFile(spiffe_end2end/ca.pem) failed: %v", err)
+	}
+	ca := x509.NewCertPool()
+	if !ca.AppendCertsFromPEM(b) {
+		t.Fatal("Failed to append certificates")
+	}
+	return credentials.NewTLS(&tls.Config{
+		ClientAuth:   clientAuth,
+		Certificates: []tls.Certificate{cert},
+		ClientCAs:    ca,
+	})
+}
+
+// CreateServerTLSCredentialsCompatibleWithSPIFFEChain creates server-side TLS
+// transport credentials using a certificate chain and key files from the
+// testdata/spiffe_end2end directory. These credentials are compatible with the
+// SPIFFE trust bundles used on the client side.
+func CreateServerTLSCredentialsCompatibleWithSPIFFEChain(t *testing.T, clientAuth tls.ClientAuthType) credentials.TransportCredentials {
+	t.Helper()
+
+	certs, err := tls.LoadX509KeyPair(testdata.Path("spiffe_end2end/leaf_and_intermediate_chain.pem"), testdata.Path("spiffe_end2end/leaf_signed_by_intermediate.key"))
+	if err != nil {
+		t.Fatalf("tls.LoadX509KeyPair(spiffe_end2end/leaf_and_intermediate_chain.pem, spiffe_end2end/leaf_signed_by_intermediate.key) failed: %v", err)
+	}
+	b, err := os.ReadFile(testdata.Path("spiffe_end2end/ca.pem"))
+	if err != nil {
+		t.Fatalf("os.ReadFile(spiffe_end2end/ca.pem) failed: %v", err)
+	}
+	ca := x509.NewCertPool()
+	if !ca.AppendCertsFromPEM(b) {
+		t.Fatal("Failed to append certificates")
+	}
+	return credentials.NewTLS(&tls.Config{
+		ClientAuth:   clientAuth,
+		Certificates: []tls.Certificate{certs},
+		ClientCAs:    ca,
+	})
+}
+
+// CreateServerTLSCredentialsValidSPIFFEButWrongCA creates server-side TLS
+// transport credentials using certificate and key files from the
+// testdata/spiffe directory rather than the testdata/spiffe_end2end directory.
+// These credentials have the expected trust domains and SPIFFE IDs that are
+// compatible with testdata/spiffe_end2end client files, but they are signed by
+// a different CA and will thus fail the connection.
+func CreateServerTLSCredentialsValidSPIFFEButWrongCA(t *testing.T, clientAuth tls.ClientAuthType) credentials.TransportCredentials {
+	t.Helper()
+
+	cert, err := tls.LoadX509KeyPair(testdata.Path("spiffe/server1_spiffe.pem"), testdata.Path("server1.key"))
+	if err != nil {
+		t.Fatalf("tls.LoadX509KeyPair(spiffe/server1_spiffe.pem, spiffe/server.key) failed: %v", err)
+	}
+	b, err := os.ReadFile(testdata.Path("spiffe_end2end/ca.pem"))
+	if err != nil {
+		t.Fatalf("os.ReadFile(spiffe_end2end/ca.pem) failed: %v", err)
+	}
+	ca := x509.NewCertPool()
+	if !ca.AppendCertsFromPEM(b) {
+		t.Fatal("Failed to append certificates")
+	}
+	return credentials.NewTLS(&tls.Config{
+		ClientAuth:   clientAuth,
+		Certificates: []tls.Certificate{cert},
+		ClientCAs:    ca,
+	})
+}