Simplify privkey package

privkey/all.go

@@ -3,7 +3,6 @@ package privkey
 import (
 	"errors"
 	"os"
-	"sync"
 )
 
 var keyBytesProvider = func(sshKeyPath *string) ([]byte, error) {
@@ -18,36 +17,22 @@ var keyBytesProvider = func(sshKeyPath *string) ([]byte, error) {
 	}
 }
 
-var providerMutex sync.RWMutex
-
 // GetBytes returns the SSH private key bytes.
 // On iOS, it calls the provider function that was set by the iOS app
 // using SetKeyBytesProvider or SetKeyBytes.
 func GetBytes(sshKeyPath *string) ([]byte, error) {
-	providerMutex.RLock()
-	provider := keyBytesProvider
-	providerMutex.RUnlock()
-
-	if provider == nil {
-		return nil, errors.New("key bytes provider not set - call SetKeyBytes first")
-	}
-
-	keyBytes, err := provider(sshKeyPath)
+	keyBytes, err := keyBytesProvider(sshKeyPath)
 	if err != nil {
 		return nil, errors.New("unable to get key bytes from provider: " + err.Error())
 	}
-
 	if len(keyBytes) == 0 {
 		return nil, errors.New("provider returned empty key bytes")
 	}
-
 	return keyBytes, nil
 }
 
 // SetBytes allows the iOS app to directly set the SSH key bytes.
 func SetBytes(keyBytes []byte) {
-	providerMutex.Lock()
-	defer providerMutex.Unlock()
 	keyBytesProvider = func(*string) ([]byte, error) {
 		return keyBytes, nil
 	}