frostfs-node/cmd/neofs-cli/internal/key/raw.go
Evgenii Stratonikov 295ec3700a [] neofs-cli: Fail immediately if a key can't be fetched
If the key can't be fetched, an error is always returned, so it makes
sense to fail the whole command inside of a `key.Get*()`.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-05-25 09:46:41 +03:00

87 lines
2.2 KiB
Go

package key
import (
"crypto/ecdsa"
"errors"
"fmt"
"os"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/wallet"
"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var errCantGenerateKey = errors.New("can't generate new private key")
// Get returns private key from the following sources:
// 1. WIF
// 2. Raw binary key
// 3. Wallet file
// 4. NEP-2 encrypted WIF.
// Ideally we want to touch file-system on the last step.
// However, asking for NEP-2 password seems to be confusing if we provide a wallet.
// This function assumes that all flags were bind to viper in a `PersistentPreRun`.
func Get(cmd *cobra.Command) *ecdsa.PrivateKey {
pk, err := get()
common.ExitOnErr(cmd, "can't fetch private key: %w", err)
return pk
}
func get() (*ecdsa.PrivateKey, error) {
keyDesc := viper.GetString(commonflags.WalletPath)
priv, err := keys.NewPrivateKeyFromWIF(keyDesc)
if err == nil {
return &priv.PrivateKey, nil
}
p, err := getKeyFromFile(keyDesc)
if err == nil {
return p, nil
}
w, err := wallet.NewWalletFromFile(keyDesc)
if err == nil {
return FromWallet(w, viper.GetString(commonflags.Account))
}
if len(keyDesc) == nep2Base58Length {
return FromNEP2(keyDesc)
}
return nil, ErrInvalidKey
}
// GetOrGenerate is similar to get but generates a new key if commonflags.GenerateKey is set.
func GetOrGenerate(cmd *cobra.Command) *ecdsa.PrivateKey {
pk, err := getOrGenerate()
common.ExitOnErr(cmd, "can't fetch private key: %w", err)
return pk
}
func getOrGenerate() (*ecdsa.PrivateKey, error) {
if viper.GetBool(commonflags.GenerateKey) {
priv, err := keys.NewPrivateKey()
if err != nil {
return nil, fmt.Errorf("%w: %v", errCantGenerateKey, err)
}
return &priv.PrivateKey, nil
}
return get()
}
func getKeyFromFile(keyPath string) (*ecdsa.PrivateKey, error) {
data, err := os.ReadFile(keyPath)
if err != nil {
return nil, fmt.Errorf("%w: %v", ErrInvalidKey, err)
}
priv, err := keys.NewPrivateKeyFromBytes(data)
if err != nil {
return nil, fmt.Errorf("%w: %v", ErrInvalidKey, err)
}
return &priv.PrivateKey, nil
}