chore: migrate to gitea

vendor/cloud.google.com/go/auth/internal/transport/cert/default_cert.go

@@ -0,0 +1,65 @@
+// Copyright 2023 Google LLC
+//
+// 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 cert
+
+import (
+	"crypto/tls"
+	"errors"
+	"sync"
+)
+
+// defaultCertData holds all the variables pertaining to
+// the default certificate provider created by [DefaultProvider].
+//
+// A singleton model is used to allow the provider to be reused
+// by the transport layer. As mentioned in [DefaultProvider] (provider nil, nil)
+// may be returned to indicate a default provider could not be found, which
+// will skip extra tls config in the transport layer .
+type defaultCertData struct {
+	once     sync.Once
+	provider Provider
+	err      error
+}
+
+var (
+	defaultCert defaultCertData
+)
+
+// Provider is a function that can be passed into crypto/tls.Config.GetClientCertificate.
+type Provider func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
+
+// errSourceUnavailable is a sentinel error to indicate certificate source is unavailable.
+var errSourceUnavailable = errors.New("certificate source is unavailable")
+
+// DefaultProvider returns a certificate source using the preferred EnterpriseCertificateProxySource.
+// If EnterpriseCertificateProxySource is not available, fall back to the legacy SecureConnectSource.
+//
+// If neither source is available (due to missing configurations), a nil Source and a nil Error are
+// returned to indicate that a default certificate source is unavailable.
+func DefaultProvider() (Provider, error) {
+	defaultCert.once.Do(func() {
+		defaultCert.provider, defaultCert.err = NewWorkloadX509CertProvider("")
+		if errors.Is(defaultCert.err, errSourceUnavailable) {
+			defaultCert.provider, defaultCert.err = NewEnterpriseCertificateProxyProvider("")
+			if errors.Is(defaultCert.err, errSourceUnavailable) {
+				defaultCert.provider, defaultCert.err = NewSecureConnectProvider("")
+				if errors.Is(defaultCert.err, errSourceUnavailable) {
+					defaultCert.provider, defaultCert.err = nil, nil
+				}
+			}
+		}
+	})
+	return defaultCert.provider, defaultCert.err
+}

vendor/cloud.google.com/go/auth/internal/transport/cert/enterprise_cert.go

@@ -0,0 +1,54 @@
+// Copyright 2023 Google LLC
+//
+// 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 cert
+
+import (
+	"crypto/tls"
+
+	"github.com/googleapis/enterprise-certificate-proxy/client"
+)
+
+type ecpSource struct {
+	key *client.Key
+}
+
+// NewEnterpriseCertificateProxyProvider creates a certificate source
+// using the Enterprise Certificate Proxy client, which delegates
+// certifcate related operations to an OS-specific "signer binary"
+// that communicates with the native keystore (ex. keychain on MacOS).
+//
+// The configFilePath points to a config file containing relevant parameters
+// such as the certificate issuer and the location of the signer binary.
+// If configFilePath is empty, the client will attempt to load the config from
+// a well-known gcloud location.
+func NewEnterpriseCertificateProxyProvider(configFilePath string) (Provider, error) {
+	key, err := client.Cred(configFilePath)
+	if err != nil {
+		// TODO(codyoss): once this is fixed upstream can handle this error a
+		// little better here. But be safe for now and assume unavailable.
+		return nil, errSourceUnavailable
+	}
+
+	return (&ecpSource{
+		key: key,
+	}).getClientCertificate, nil
+}
+
+func (s *ecpSource) getClientCertificate(info *tls.CertificateRequestInfo) (*tls.Certificate, error) {
+	var cert tls.Certificate
+	cert.PrivateKey = s.key
+	cert.Certificate = s.key.CertificateChain()
+	return &cert, nil
+}

vendor/cloud.google.com/go/auth/internal/transport/cert/secureconnect_cert.go

@@ -0,0 +1,124 @@
+// Copyright 2023 Google LLC
+//
+// 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 cert
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"os/user"
+	"path/filepath"
+	"sync"
+	"time"
+)
+
+const (
+	metadataPath = ".secureConnect"
+	metadataFile = "context_aware_metadata.json"
+)
+
+type secureConnectSource struct {
+	metadata secureConnectMetadata
+
+	// Cache the cert to avoid executing helper command repeatedly.
+	cachedCertMutex sync.Mutex
+	cachedCert      *tls.Certificate
+}
+
+type secureConnectMetadata struct {
+	Cmd []string `json:"cert_provider_command"`
+}
+
+// NewSecureConnectProvider creates a certificate source using
+// the Secure Connect Helper and its associated metadata file.
+//
+// The configFilePath points to the location of the context aware metadata file.
+// If configFilePath is empty, use the default context aware metadata location.
+func NewSecureConnectProvider(configFilePath string) (Provider, error) {
+	if configFilePath == "" {
+		user, err := user.Current()
+		if err != nil {
+			// Error locating the default config means Secure Connect is not supported.
+			return nil, errSourceUnavailable
+		}
+		configFilePath = filepath.Join(user.HomeDir, metadataPath, metadataFile)
+	}
+
+	file, err := os.ReadFile(configFilePath)
+	if err != nil {
+		// Config file missing means Secure Connect is not supported.
+		// There are non-os.ErrNotExist errors that may be returned.
+		// (e.g. if the home directory is /dev/null, *nix systems will
+		// return ENOTDIR instead of ENOENT)
+		return nil, errSourceUnavailable
+	}
+
+	var metadata secureConnectMetadata
+	if err := json.Unmarshal(file, &metadata); err != nil {
+		return nil, fmt.Errorf("cert: could not parse JSON in %q: %w", configFilePath, err)
+	}
+	if err := validateMetadata(metadata); err != nil {
+		return nil, fmt.Errorf("cert: invalid config in %q: %w", configFilePath, err)
+	}
+	return (&secureConnectSource{
+		metadata: metadata,
+	}).getClientCertificate, nil
+}
+
+func validateMetadata(metadata secureConnectMetadata) error {
+	if len(metadata.Cmd) == 0 {
+		return errors.New("empty cert_provider_command")
+	}
+	return nil
+}
+
+func (s *secureConnectSource) getClientCertificate(info *tls.CertificateRequestInfo) (*tls.Certificate, error) {
+	s.cachedCertMutex.Lock()
+	defer s.cachedCertMutex.Unlock()
+	if s.cachedCert != nil && !isCertificateExpired(s.cachedCert) {
+		return s.cachedCert, nil
+	}
+	// Expand OS environment variables in the cert provider command such as "$HOME".
+	for i := 0; i < len(s.metadata.Cmd); i++ {
+		s.metadata.Cmd[i] = os.ExpandEnv(s.metadata.Cmd[i])
+	}
+	command := s.metadata.Cmd
+	data, err := exec.Command(command[0], command[1:]...).Output()
+	if err != nil {
+		return nil, err
+	}
+	cert, err := tls.X509KeyPair(data, data)
+	if err != nil {
+		return nil, err
+	}
+	s.cachedCert = &cert
+	return &cert, nil
+}
+
+// isCertificateExpired returns true if the given cert is expired or invalid.
+func isCertificateExpired(cert *tls.Certificate) bool {
+	if len(cert.Certificate) == 0 {
+		return true
+	}
+	parsed, err := x509.ParseCertificate(cert.Certificate[0])
+	if err != nil {
+		return true
+	}
+	return time.Now().After(parsed.NotAfter)
+}

vendor/cloud.google.com/go/auth/internal/transport/cert/workload_cert.go

@@ -0,0 +1,138 @@
+// Copyright 2024 Google LLC
+//
+// 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 cert
+
+import (
+	"crypto/tls"
+	"encoding/json"
+	"errors"
+	"io"
+	"os"
+
+	"github.com/googleapis/enterprise-certificate-proxy/client/util"
+)
+
+type certConfigs struct {
+	Workload *workloadSource `json:"workload"`
+}
+
+type workloadSource struct {
+	CertPath string `json:"cert_path"`
+	KeyPath  string `json:"key_path"`
+}
+
+type certificateConfig struct {
+	CertConfigs certConfigs `json:"cert_configs"`
+}
+
+// getconfigFilePath determines the path to the certificate configuration file.
+// It first checks for the presence of an environment variable that specifies
+// the file path. If the environment variable is not set, it falls back to
+// a default configuration file path.
+func getconfigFilePath() string {
+	envFilePath := util.GetConfigFilePathFromEnv()
+	if envFilePath != "" {
+		return envFilePath
+	}
+	return util.GetDefaultConfigFilePath()
+
+}
+
+// GetCertificatePath retrieves the certificate file path from the provided
+// configuration file. If the configFilePath is empty, it attempts to load
+// the configuration from a well-known gcloud location.
+// This function is exposed to allow other packages, such as the
+// externalaccount package, to retrieve the certificate path without needing
+// to load the entire certificate configuration.
+func GetCertificatePath(configFilePath string) (string, error) {
+	if configFilePath == "" {
+		configFilePath = getconfigFilePath()
+	}
+	certFile, _, err := getCertAndKeyFiles(configFilePath)
+	if err != nil {
+		return "", err
+	}
+	return certFile, nil
+}
+
+// NewWorkloadX509CertProvider creates a certificate source
+// that reads a certificate and private key file from the local file system.
+// This is intended to be used for workload identity federation.
+//
+// The configFilePath points to a config file containing relevant parameters
+// such as the certificate and key file paths.
+// If configFilePath is empty, the client will attempt to load the config from
+// a well-known gcloud location.
+func NewWorkloadX509CertProvider(configFilePath string) (Provider, error) {
+	if configFilePath == "" {
+		configFilePath = getconfigFilePath()
+	}
+	certFile, keyFile, err := getCertAndKeyFiles(configFilePath)
+	if err != nil {
+		return nil, err
+	}
+
+	source := &workloadSource{
+		CertPath: certFile,
+		KeyPath:  keyFile,
+	}
+	return source.getClientCertificate, nil
+}
+
+// getClientCertificate attempts to load the certificate and key from the files specified in the
+// certificate config.
+func (s *workloadSource) getClientCertificate(info *tls.CertificateRequestInfo) (*tls.Certificate, error) {
+	cert, err := tls.LoadX509KeyPair(s.CertPath, s.KeyPath)
+	if err != nil {
+		return nil, err
+	}
+	return &cert, nil
+}
+
+// getCertAndKeyFiles attempts to read the provided config file and return the certificate and private
+// key file paths.
+func getCertAndKeyFiles(configFilePath string) (string, string, error) {
+	jsonFile, err := os.Open(configFilePath)
+	if err != nil {
+		return "", "", errSourceUnavailable
+	}
+
+	byteValue, err := io.ReadAll(jsonFile)
+	if err != nil {
+		return "", "", err
+	}
+
+	var config certificateConfig
+	if err := json.Unmarshal(byteValue, &config); err != nil {
+		return "", "", err
+	}
+
+	if config.CertConfigs.Workload == nil {
+		return "", "", errSourceUnavailable
+	}
+
+	certFile := config.CertConfigs.Workload.CertPath
+	keyFile := config.CertConfigs.Workload.KeyPath
+
+	if certFile == "" {
+		return "", "", errors.New("certificate configuration is missing the certificate file location")
+	}
+
+	if keyFile == "" {
+		return "", "", errors.New("certificate configuration is missing the key file location")
+	}
+
+	return certFile, keyFile, nil
+}