first commit

agent/internal/grpc/client.go

@@ -0,0 +1,100 @@
+package grpcclient
+
+import (
+	"context"
+	"crypto/tls"
+	"time"
+
+	"github.com/mrhid6/keymanager/agent/internal/grpc/pb"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/encoding"
+)
+
+func init() {
+	encoding.RegisterCodec(JSONCodec{})
+}
+
+type Client struct {
+	conn   *grpc.ClientConn
+	client pb.KeyManagerClient
+}
+
+func New(serverURL string, useTLS bool) (*Client, error) {
+	var dialOpts []grpc.DialOption
+
+	if useTLS {
+		tlsCfg := &tls.Config{
+			InsecureSkipVerify: false,
+		}
+		creds := credentials.NewTLS(tlsCfg)
+		dialOpts = append(dialOpts, grpc.WithTransportCredentials(creds))
+	} else {
+		dialOpts = append(dialOpts, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	conn, err := grpc.DialContext(ctx, serverURL, dialOpts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Client{
+		conn:   conn,
+		client: pb.NewKeyManagerClient(conn),
+	}, nil
+}
+
+func (c *Client) Close() error {
+	return c.conn.Close()
+}
+
+func (c *Client) Register(serverID, preRegToken, hostname, ipAddress, osInfo string) (string, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	resp, err := c.client.Register(ctx, &pb.RegisterRequest{
+		ServerId:    serverID,
+		PreRegToken: preRegToken,
+		Hostname:    hostname,
+		IpAddress:   ipAddress,
+		OsInfo:      osInfo,
+	})
+	if err != nil {
+		return "", err
+	}
+	return resp.AgentToken, nil
+}
+
+func (c *Client) SyncKeys(serverID, agentToken string) ([]string, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	resp, err := c.client.SyncKeys(ctx, &pb.SyncRequest{
+		ServerId:   serverID,
+		AgentToken: agentToken,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return resp.PublicKeys, nil
+}
+
+func (c *Client) UploadGeneratedKey(serverID, agentToken, publicKey, label string) (string, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	resp, err := c.client.UploadGeneratedKey(ctx, &pb.UploadKeyRequest{
+		ServerId:   serverID,
+		AgentToken: agentToken,
+		PublicKey:  publicKey,
+		Label:      label,
+	})
+	if err != nil {
+		return "", err
+	}
+	return resp.KeyId, nil
+}

agent/internal/grpc/codec.go

@@ -0,0 +1,17 @@
+package grpcclient
+
+import "encoding/json"
+
+type JSONCodec struct{}
+
+func (JSONCodec) Marshal(v interface{}) ([]byte, error) {
+	return json.Marshal(v)
+}
+
+func (JSONCodec) Unmarshal(data []byte, v interface{}) error {
+	return json.Unmarshal(data, v)
+}
+
+func (JSONCodec) Name() string {
+	return "proto"
+}

agent/internal/grpc/pb/keymanager.pb.go

@@ -0,0 +1,93 @@
+// Hand-written gRPC bindings for keymanager.proto (agent side, JSON codec).
+
+package pb
+
+import (
+	"context"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+type RegisterRequest struct {
+	ServerId    string `json:"server_id"`
+	PreRegToken string `json:"pre_reg_token"`
+	Hostname    string `json:"hostname"`
+	IpAddress   string `json:"ip_address"`
+	OsInfo      string `json:"os_info"`
+}
+
+type RegisterResponse struct {
+	AgentToken string `json:"agent_token"`
+}
+
+type SyncRequest struct {
+	ServerId   string `json:"server_id"`
+	AgentToken string `json:"agent_token"`
+}
+
+type SyncResponse struct {
+	PublicKeys []string `json:"public_keys"`
+}
+
+type UploadKeyRequest struct {
+	ServerId   string `json:"server_id"`
+	AgentToken string `json:"agent_token"`
+	PublicKey  string `json:"public_key"`
+	Label      string `json:"label"`
+}
+
+type UploadKeyResponse struct {
+	KeyId string `json:"key_id"`
+}
+
+type KeyManagerClient interface {
+	Register(ctx context.Context, in *RegisterRequest, opts ...grpc.CallOption) (*RegisterResponse, error)
+	SyncKeys(ctx context.Context, in *SyncRequest, opts ...grpc.CallOption) (*SyncResponse, error)
+	UploadGeneratedKey(ctx context.Context, in *UploadKeyRequest, opts ...grpc.CallOption) (*UploadKeyResponse, error)
+}
+
+type UnimplementedKeyManagerServer struct{}
+
+func (UnimplementedKeyManagerServer) Register(context.Context, *RegisterRequest) (*RegisterResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "not implemented")
+}
+func (UnimplementedKeyManagerServer) SyncKeys(context.Context, *SyncRequest) (*SyncResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "not implemented")
+}
+func (UnimplementedKeyManagerServer) UploadGeneratedKey(context.Context, *UploadKeyRequest) (*UploadKeyResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "not implemented")
+}
+
+type keyManagerClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewKeyManagerClient(cc grpc.ClientConnInterface) KeyManagerClient {
+	return &keyManagerClient{cc}
+}
+
+func (c *keyManagerClient) Register(ctx context.Context, in *RegisterRequest, opts ...grpc.CallOption) (*RegisterResponse, error) {
+	out := new(RegisterResponse)
+	if err := c.cc.Invoke(ctx, "/keymanager.v1.KeyManager/Register", in, out, opts...); err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *keyManagerClient) SyncKeys(ctx context.Context, in *SyncRequest, opts ...grpc.CallOption) (*SyncResponse, error) {
+	out := new(SyncResponse)
+	if err := c.cc.Invoke(ctx, "/keymanager.v1.KeyManager/SyncKeys", in, out, opts...); err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *keyManagerClient) UploadGeneratedKey(ctx context.Context, in *UploadKeyRequest, opts ...grpc.CallOption) (*UploadKeyResponse, error) {
+	out := new(UploadKeyResponse)
+	if err := c.cc.Invoke(ctx, "/keymanager.v1.KeyManager/UploadGeneratedKey", in, out, opts...); err != nil {
+		return nil, err
+	}
+	return out, nil
+}