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local.go
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local.go
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package local
import (
"errors"
"fmt"
"os"
"path/filepath"
"sync"
"github.com/ExzoNetwork/ExzoCoin/helper/common"
"github.com/ExzoNetwork/ExzoCoin/secrets"
"github.com/hashicorp/go-hclog"
)
// LocalSecretsManager is a SecretsManager that
// stores secrets locally on disk
type LocalSecretsManager struct {
// Logger object
logger hclog.Logger
// Path to the base working directory
path string
// Map of known secrets and their paths
secretPathMap map[string]string
// Mux for the secretPathMap
secretPathMapLock sync.RWMutex
}
// SecretsManagerFactory implements the factory method
func SecretsManagerFactory(
_ *secrets.SecretsManagerConfig,
params *secrets.SecretsManagerParams,
) (secrets.SecretsManager, error) {
// Set up the base object
localManager := &LocalSecretsManager{
logger: params.Logger.Named(string(secrets.Local)),
secretPathMap: make(map[string]string),
}
// Grab the path to the working directory
path, ok := params.Extra[secrets.Path]
if !ok {
return nil, errors.New("no path specified for local secrets manager")
}
localManager.path, ok = path.(string)
if !ok {
return nil, errors.New("invalid type assertion")
}
// Run the initial setup
_ = localManager.Setup()
return localManager, nil
}
// Setup sets up the local SecretsManager
func (l *LocalSecretsManager) Setup() error {
// The local SecretsManager initially handles only the
// validator and networking private keys
l.secretPathMapLock.Lock()
defer l.secretPathMapLock.Unlock()
subDirectories := []string{secrets.ConsensusFolderLocal, secrets.NetworkFolderLocal}
// Set up the local directories
if err := common.SetupDataDir(l.path, subDirectories); err != nil {
return err
}
// baseDir/consensus/validator.key
l.secretPathMap[secrets.ValidatorKey] = filepath.Join(
l.path,
secrets.ConsensusFolderLocal,
secrets.ValidatorKeyLocal,
)
// baseDir/consensus/validator-bls.key
l.secretPathMap[secrets.ValidatorBLSKey] = filepath.Join(
l.path,
secrets.ConsensusFolderLocal,
secrets.ValidatorBLSKeyLocal,
)
// baseDir/libp2p/libp2p.key
l.secretPathMap[secrets.NetworkKey] = filepath.Join(
l.path,
secrets.NetworkFolderLocal,
secrets.NetworkKeyLocal,
)
return nil
}
// GetSecret gets the local SecretsManager's secret from disk
func (l *LocalSecretsManager) GetSecret(name string) ([]byte, error) {
l.secretPathMapLock.RLock()
secretPath, ok := l.secretPathMap[name]
l.secretPathMapLock.RUnlock()
if !ok {
return nil, secrets.ErrSecretNotFound
}
// Read the secret from disk
secret, err := os.ReadFile(secretPath)
if err != nil {
return nil, fmt.Errorf(
"unable to read secret from disk (%s), %w",
secretPath,
err,
)
}
return secret, nil
}
// SetSecret saves the local SecretsManager's secret to disk
func (l *LocalSecretsManager) SetSecret(name string, value []byte) error {
// If the data directory is not specified, skip write
if l.path == "" {
return nil
}
l.secretPathMapLock.Lock()
secretPath, ok := l.secretPathMap[name]
l.secretPathMapLock.Unlock()
if !ok {
return secrets.ErrSecretNotFound
}
// Checks for existing secret
if _, err := os.Stat(secretPath); err == nil {
return fmt.Errorf(
"%s already initialized",
secretPath,
)
}
// Write the secret to disk
if err := os.WriteFile(secretPath, value, os.ModePerm); err != nil {
return fmt.Errorf(
"unable to write secret to disk (%s), %w",
secretPath,
err,
)
}
return nil
}
// HasSecret checks if the secret is present on disk
func (l *LocalSecretsManager) HasSecret(name string) bool {
_, err := l.GetSecret(name)
return err == nil
}
// RemoveSecret removes the local SecretsManager's secret from disk
func (l *LocalSecretsManager) RemoveSecret(name string) error {
l.secretPathMapLock.Lock()
secretPath, ok := l.secretPathMap[name]
defer l.secretPathMapLock.Unlock()
if !ok {
return secrets.ErrSecretNotFound
}
delete(l.secretPathMap, name)
if removeErr := os.Remove(secretPath); removeErr != nil {
return fmt.Errorf("unable to remove secret, %w", removeErr)
}
return nil
}