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feat: add KMS assisted encryption key handler
Talos now supports new type of encryption keys which rely on Sealing/Unsealing randomly generated bytes with a KMS server:
```
systemDiskEncryption:
ephemeral:
keys:
- kms:
endpoint: https://1.2.3.4:443
slot: 0
```
gRPC API definitions and a simple reference implementation of the KMS server can be found in this
[repository](https://github.com/siderolabs/kms-client/blob/main/cmd/kms-server/main.go).
Signed-off-by: Artem Chernyshev <artem.chernyshev@talos-systems.com>- Loading branch information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| package mgmt | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "log" | ||
| "net" | ||
|
|
||
| "github.com/siderolabs/kms-client/api/kms" | ||
| "github.com/siderolabs/kms-client/pkg/server" | ||
| "github.com/spf13/cobra" | ||
| "golang.org/x/sync/errgroup" | ||
| "google.golang.org/grpc" | ||
|
|
||
| grpclog "github.com/siderolabs/talos/pkg/grpc/middleware/log" | ||
| ) | ||
|
|
||
| var kmsLaunchCmdFlags struct { | ||
| addr string | ||
| key []byte | ||
| } | ||
|
|
||
| // kmsLaunchCmd represents the kms-launch command. | ||
| var kmsLaunchCmd = &cobra.Command{ | ||
| Use: "kms-launch", | ||
| Short: "Internal command used by QEMU provisioner", | ||
| Long: ``, | ||
| Args: cobra.NoArgs, | ||
| Hidden: true, | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
| if kmsLaunchCmdFlags.key == nil { | ||
| return fmt.Errorf("no key provided to the KMS server") | ||
| } | ||
|
|
||
| srv := server.NewServer(func(_ context.Context, nodeUUID string) ([]byte, error) { | ||
| return kmsLaunchCmdFlags.key, nil | ||
| }) | ||
|
|
||
| lis, err := net.Listen("tcp", kmsLaunchCmdFlags.addr) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| log.Printf("starting KMS server on %s", kmsLaunchCmdFlags.addr) | ||
|
|
||
| logMiddleware := grpclog.NewMiddleware(log.New(log.Writer(), "", log.Flags())) | ||
|
|
||
| s := grpc.NewServer( | ||
| grpc.UnaryInterceptor(logMiddleware.UnaryInterceptor()), | ||
| grpc.StreamInterceptor(logMiddleware.StreamInterceptor()), | ||
| ) | ||
| kms.RegisterKMSServiceServer(s, srv) | ||
|
|
||
| eg, ctx := errgroup.WithContext(cmd.Context()) | ||
|
|
||
| eg.Go(func() error { | ||
| err := s.Serve(lis) | ||
| if errors.Is(err, context.Canceled) { | ||
| return nil | ||
| } | ||
|
|
||
| return err | ||
| }) | ||
|
|
||
| eg.Go(func() error { | ||
| <-ctx.Done() | ||
|
|
||
| s.Stop() | ||
|
|
||
| return nil | ||
| }) | ||
|
|
||
| return s.Serve(lis) | ||
| }, | ||
| } | ||
|
|
||
| func init() { | ||
| kmsLaunchCmd.Flags().StringVar(&kmsLaunchCmdFlags.addr, "kms-addr", "localhost", "KMS listen address (IP or host)") | ||
| kmsLaunchCmd.Flags().BytesBase64Var(&kmsLaunchCmdFlags.key, "kms-key", nil, "KMS key to use") | ||
| addCommand(kmsLaunchCmd) | ||
| } |
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