allow wallet import to import keys in go-filecoin key format

cli/wallet.go

@@ -13,6 +13,7 @@ import (
 	types "github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/chain/wallet"
 	"github.com/filecoin-project/specs-actors/actors/crypto"
+	"golang.org/x/xerrors"
 
 	"gopkg.in/urfave/cli.v2"
 )
@@ -202,6 +203,13 @@ var walletImport = &cli.Command{
 	Name:      "import",
 	Usage:     "import keys",
 	ArgsUsage: "[<path> (optional, will read from stdin if omitted)]",
+	Flags: []cli.Flag{
+		&cli.StringFlag{
+			Name:  "format",
+			Usage: "specify input format for key",
+			Value: "hex-lotus",
+		},
+	},
 	Action: func(cctx *cli.Context) error {
 		api, closer, err := GetFullNodeAPI(cctx)
 		if err != nil {
@@ -210,7 +218,7 @@ var walletImport = &cli.Command{
 		defer closer()
 		ctx := ReqContext(cctx)
 
-		var hexdata []byte
+		var inpdata []byte
 		if !cctx.Args().Present() || cctx.Args().First() == "-" {
 			reader := bufio.NewReader(os.Stdin)
 			fmt.Print("Enter private key: ")
@@ -218,23 +226,54 @@ var walletImport = &cli.Command{
 			if err != nil {
 				return err
 			}
-			hexdata = indata
+			inpdata = indata
 
 		} else {
 			fdata, err := ioutil.ReadFile(cctx.Args().First())
 			if err != nil {
 				return err
 			}
-			hexdata = fdata
-		}
-		data, err := hex.DecodeString(strings.TrimSpace(string(hexdata)))
-		if err != nil {
-			return err
+			inpdata = fdata
 		}
 
 		var ki types.KeyInfo
-		if err := json.Unmarshal(data, &ki); err != nil {
-			return err
+		switch cctx.String("format") {
+		case "hex-lotus":
+			data, err := hex.DecodeString(strings.TrimSpace(string(inpdata)))
+			if err != nil {
+				return err
+			}
+
+			if err := json.Unmarshal(data, &ki); err != nil {
+				return err
+			}
+		case "json-lotus":
+			if err := json.Unmarshal(inpdata, &ki); err != nil {
+				return err
+			}
+		case "gfc-json":
+			var f struct {
+				KeyInfo []struct {
+					PrivateKey []byte
+					SigType    int
+				}
+			}
+			if err := json.Unmarshal(inpdata, &f); err != nil {
+				return xerrors.Errorf("failed to parse go-filecoin key: %s", err)
+			}
+
+			gk := f.KeyInfo[0]
+			ki.PrivateKey = gk.PrivateKey
+			switch gk.SigType {
+			case 1:
+				ki.Type = wallet.KTSecp256k1
+			case 2:
+				ki.Type = wallet.KTBLS
+			default:
+				return fmt.Errorf("unrecognized key type: %d", gk.SigType)
+			}
+		default:
+			return fmt.Errorf("unrecognized format: %s", cctx.String("format"))
 		}
 
 		addr, err := api.WalletImport(ctx, &ki)