155 lines
3.9 KiB
Go
155 lines
3.9 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package plugin
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import (
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"context"
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"errors"
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"google.golang.org/grpc"
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"github.com/hashicorp/vault/sdk/logical"
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"github.com/hashicorp/vault/sdk/plugin/pb"
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)
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var errMissingStorage = errors.New("missing storage implementation: this method should not be called during plugin Setup, but only during and after Initialize")
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func newGRPCStorageClient(conn *grpc.ClientConn) *GRPCStorageClient {
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return &GRPCStorageClient{
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client: pb.NewStorageClient(conn),
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}
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}
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// GRPCStorageClient is an implementation of logical.Storage that communicates
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// over RPC.
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type GRPCStorageClient struct {
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client pb.StorageClient
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}
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func (s *GRPCStorageClient) List(ctx context.Context, prefix string) ([]string, error) {
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reply, err := s.client.List(ctx, &pb.StorageListArgs{
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Prefix: prefix,
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}, largeMsgGRPCCallOpts...)
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if err != nil {
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return []string{}, err
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}
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if reply.Err != "" {
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return reply.Keys, errors.New(reply.Err)
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}
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return reply.Keys, nil
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}
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func (s *GRPCStorageClient) Get(ctx context.Context, key string) (*logical.StorageEntry, error) {
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reply, err := s.client.Get(ctx, &pb.StorageGetArgs{
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Key: key,
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}, largeMsgGRPCCallOpts...)
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if err != nil {
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return nil, err
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}
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if reply.Err != "" {
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return nil, errors.New(reply.Err)
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}
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return pb.ProtoStorageEntryToLogicalStorageEntry(reply.Entry), nil
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}
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func (s *GRPCStorageClient) Put(ctx context.Context, entry *logical.StorageEntry) error {
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reply, err := s.client.Put(ctx, &pb.StoragePutArgs{
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Entry: pb.LogicalStorageEntryToProtoStorageEntry(entry),
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}, largeMsgGRPCCallOpts...)
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if err != nil {
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return err
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}
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if reply.Err != "" {
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return errors.New(reply.Err)
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}
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return nil
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}
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func (s *GRPCStorageClient) Delete(ctx context.Context, key string) error {
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reply, err := s.client.Delete(ctx, &pb.StorageDeleteArgs{
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Key: key,
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})
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if err != nil {
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return err
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}
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if reply.Err != "" {
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return errors.New(reply.Err)
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}
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return nil
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}
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// GRPCStorageServer is a net/rpc compatible structure for serving
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type GRPCStorageServer struct {
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pb.UnimplementedStorageServer
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impl logical.Storage
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}
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func (s *GRPCStorageServer) List(ctx context.Context, args *pb.StorageListArgs) (*pb.StorageListReply, error) {
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if s.impl == nil {
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return nil, errMissingStorage
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}
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keys, err := s.impl.List(ctx, args.Prefix)
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return &pb.StorageListReply{
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Keys: keys,
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Err: pb.ErrToString(err),
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}, nil
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}
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func (s *GRPCStorageServer) Get(ctx context.Context, args *pb.StorageGetArgs) (*pb.StorageGetReply, error) {
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if s.impl == nil {
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return nil, errMissingStorage
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}
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storageEntry, err := s.impl.Get(ctx, args.Key)
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if storageEntry == nil {
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return &pb.StorageGetReply{
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Entry: nil,
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Err: pb.ErrToString(err),
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}, nil
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}
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return &pb.StorageGetReply{
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Entry: pb.LogicalStorageEntryToProtoStorageEntry(storageEntry),
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Err: pb.ErrToString(err),
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}, nil
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}
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func (s *GRPCStorageServer) Put(ctx context.Context, args *pb.StoragePutArgs) (*pb.StoragePutReply, error) {
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if s.impl == nil {
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return nil, errMissingStorage
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}
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err := s.impl.Put(ctx, pb.ProtoStorageEntryToLogicalStorageEntry(args.Entry))
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return &pb.StoragePutReply{
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Err: pb.ErrToString(err),
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}, nil
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}
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func (s *GRPCStorageServer) Delete(ctx context.Context, args *pb.StorageDeleteArgs) (*pb.StorageDeleteReply, error) {
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if s.impl == nil {
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return nil, errMissingStorage
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}
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err := s.impl.Delete(ctx, args.Key)
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return &pb.StorageDeleteReply{
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Err: pb.ErrToString(err),
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}, nil
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}
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// NOOPStorage is used to deny access to the storage interface while running a
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// backend plugin in metadata mode.
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type NOOPStorage struct{}
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func (s *NOOPStorage) List(_ context.Context, prefix string) ([]string, error) {
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return []string{}, nil
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}
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func (s *NOOPStorage) Get(_ context.Context, key string) (*logical.StorageEntry, error) {
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return nil, nil
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}
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func (s *NOOPStorage) Put(_ context.Context, entry *logical.StorageEntry) error {
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return nil
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}
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func (s *NOOPStorage) Delete(_ context.Context, key string) error {
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return nil
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}
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