accounts/scwallet: fix staticcheck warnings (#20370)
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@ -71,7 +71,7 @@ func NewSecureChannelSession(card *pcsc.Card, keyData []byte) (*SecureChannelSes
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cardPublic, ok := gen.Unmarshal(keyData)
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if !ok {
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return nil, fmt.Errorf("Could not unmarshal public key from card")
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return nil, fmt.Errorf("could not unmarshal public key from card")
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}
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secret, err := gen.GenerateSharedSecret(private, cardPublic)
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@ -109,7 +109,7 @@ func (s *SecureChannelSession) Pair(pairingPassword []byte) error {
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cardChallenge := response.Data[32:64]
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if !bytes.Equal(expectedCryptogram, cardCryptogram) {
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return fmt.Errorf("Invalid card cryptogram %v != %v", expectedCryptogram, cardCryptogram)
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return fmt.Errorf("invalid card cryptogram %v != %v", expectedCryptogram, cardCryptogram)
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}
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md.Reset()
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@ -132,7 +132,7 @@ func (s *SecureChannelSession) Pair(pairingPassword []byte) error {
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// Unpair disestablishes an existing pairing.
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func (s *SecureChannelSession) Unpair() error {
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if s.PairingKey == nil {
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return fmt.Errorf("Cannot unpair: not paired")
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return fmt.Errorf("cannot unpair: not paired")
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}
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_, err := s.transmitEncrypted(claSCWallet, insUnpair, s.PairingIndex, 0, []byte{})
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@ -148,7 +148,7 @@ func (s *SecureChannelSession) Unpair() error {
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// Open initializes the secure channel.
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func (s *SecureChannelSession) Open() error {
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if s.iv != nil {
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return fmt.Errorf("Session already opened")
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return fmt.Errorf("session already opened")
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}
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response, err := s.open()
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@ -185,11 +185,11 @@ func (s *SecureChannelSession) mutuallyAuthenticate() error {
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return err
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}
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if response.Sw1 != 0x90 || response.Sw2 != 0x00 {
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return fmt.Errorf("Got unexpected response from MUTUALLY_AUTHENTICATE: 0x%x%x", response.Sw1, response.Sw2)
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return fmt.Errorf("got unexpected response from MUTUALLY_AUTHENTICATE: 0x%x%x", response.Sw1, response.Sw2)
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}
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if len(response.Data) != scSecretLength {
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return fmt.Errorf("Response from MUTUALLY_AUTHENTICATE was %d bytes, expected %d", len(response.Data), scSecretLength)
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return fmt.Errorf("response from MUTUALLY_AUTHENTICATE was %d bytes, expected %d", len(response.Data), scSecretLength)
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}
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return nil
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@ -222,7 +222,7 @@ func (s *SecureChannelSession) pair(p1 uint8, data []byte) (*responseAPDU, error
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// transmitEncrypted sends an encrypted message, and decrypts and returns the response.
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func (s *SecureChannelSession) transmitEncrypted(cla, ins, p1, p2 byte, data []byte) (*responseAPDU, error) {
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if s.iv == nil {
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return nil, fmt.Errorf("Channel not open")
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return nil, fmt.Errorf("channel not open")
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}
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data, err := s.encryptAPDU(data)
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@ -261,14 +261,14 @@ func (s *SecureChannelSession) transmitEncrypted(cla, ins, p1, p2 byte, data []b
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return nil, err
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}
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if !bytes.Equal(s.iv, rmac) {
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return nil, fmt.Errorf("Invalid MAC in response")
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return nil, fmt.Errorf("invalid MAC in response")
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}
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rapdu := &responseAPDU{}
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rapdu.deserialize(plainData)
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if rapdu.Sw1 != sw1Ok {
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return nil, fmt.Errorf("Unexpected response status Cla=0x%x, Ins=0x%x, Sw=0x%x%x", cla, ins, rapdu.Sw1, rapdu.Sw2)
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return nil, fmt.Errorf("unexpected response status Cla=0x%x, Ins=0x%x, Sw=0x%x%x", cla, ins, rapdu.Sw1, rapdu.Sw2)
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}
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return rapdu, nil
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@ -277,7 +277,7 @@ func (s *SecureChannelSession) transmitEncrypted(cla, ins, p1, p2 byte, data []b
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// encryptAPDU is an internal method that serializes and encrypts an APDU.
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func (s *SecureChannelSession) encryptAPDU(data []byte) ([]byte, error) {
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if len(data) > maxPayloadSize {
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return nil, fmt.Errorf("Payload of %d bytes exceeds maximum of %d", len(data), maxPayloadSize)
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return nil, fmt.Errorf("payload of %d bytes exceeds maximum of %d", len(data), maxPayloadSize)
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}
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data = pad(data, 0x80)
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@ -323,10 +323,10 @@ func unpad(data []byte, terminator byte) ([]byte, error) {
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case terminator:
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return data[:len(data)-i], nil
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default:
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return nil, fmt.Errorf("Expected end of padding, got %d", data[len(data)-i])
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return nil, fmt.Errorf("expected end of padding, got %d", data[len(data)-i])
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}
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}
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return nil, fmt.Errorf("Expected end of padding, got 0")
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return nil, fmt.Errorf("expected end of padding, got 0")
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}
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// updateIV is an internal method that updates the initialization vector after
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@ -167,7 +167,7 @@ func transmit(card *pcsc.Card, command *commandAPDU) (*responseAPDU, error) {
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}
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if response.Sw1 != sw1Ok {
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return nil, fmt.Errorf("Unexpected insecure response status Cla=0x%x, Ins=0x%x, Sw=0x%x%x", command.Cla, command.Ins, response.Sw1, response.Sw2)
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return nil, fmt.Errorf("unexpected insecure response status Cla=0x%x, Ins=0x%x, Sw=0x%x%x", command.Cla, command.Ins, response.Sw1, response.Sw2)
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}
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return response, nil
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@ -252,7 +252,7 @@ func (w *Wallet) release() error {
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// with the wallet.
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func (w *Wallet) pair(puk []byte) error {
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if w.session.paired() {
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return fmt.Errorf("Wallet already paired")
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return fmt.Errorf("wallet already paired")
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}
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pairing, err := w.session.pair(puk)
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if err != nil {
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@ -773,12 +773,12 @@ func (w *Wallet) findAccountPath(account accounts.Account) (accounts.DerivationP
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// Look for the path in the URL
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if account.URL.Scheme != w.Hub.scheme {
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return nil, fmt.Errorf("Scheme %s does not match wallet scheme %s", account.URL.Scheme, w.Hub.scheme)
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return nil, fmt.Errorf("scheme %s does not match wallet scheme %s", account.URL.Scheme, w.Hub.scheme)
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}
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parts := strings.SplitN(account.URL.Path, "/", 2)
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if len(parts) != 2 {
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return nil, fmt.Errorf("Invalid URL format: %s", account.URL)
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return nil, fmt.Errorf("invalid URL format: %s", account.URL)
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}
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if parts[0] != fmt.Sprintf("%x", w.PublicKey[1:3]) {
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@ -813,7 +813,7 @@ func (s *Session) pair(secret []byte) (smartcardPairing, error) {
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// unpair deletes an existing pairing.
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func (s *Session) unpair() error {
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if !s.verified {
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return fmt.Errorf("Unpair requires that the PIN be verified")
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return fmt.Errorf("unpair requires that the PIN be verified")
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}
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return s.Channel.Unpair()
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}
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@ -850,7 +850,7 @@ func (s *Session) paired() bool {
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// authenticate uses an existing pairing to establish a secure channel.
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func (s *Session) authenticate(pairing smartcardPairing) error {
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if !bytes.Equal(s.Wallet.PublicKey, pairing.PublicKey) {
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return fmt.Errorf("Cannot pair using another wallet's pairing; %x != %x", s.Wallet.PublicKey, pairing.PublicKey)
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return fmt.Errorf("cannot pair using another wallet's pairing; %x != %x", s.Wallet.PublicKey, pairing.PublicKey)
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}
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s.Channel.PairingKey = pairing.PairingKey
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s.Channel.PairingIndex = pairing.PairingIndex
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@ -879,6 +879,7 @@ func (s *Session) walletStatus() (*walletStatus, error) {
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}
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// derivationPath fetches the wallet's current derivation path from the card.
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//lint:ignore U1000 needs to be added to the console interface
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func (s *Session) derivationPath() (accounts.DerivationPath, error) {
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response, err := s.Channel.transmitEncrypted(claSCWallet, insStatus, statusP1Path, 0, nil)
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if err != nil {
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@ -993,12 +994,14 @@ func (s *Session) derive(path accounts.DerivationPath) (accounts.Account, error)
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}
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// keyExport contains information on an exported keypair.
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//lint:ignore U1000 needs to be added to the console interface
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type keyExport struct {
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PublicKey []byte `asn1:"tag:0"`
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PrivateKey []byte `asn1:"tag:1,optional"`
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}
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// publicKey returns the public key for the current derivation path.
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//lint:ignore U1000 needs to be added to the console interface
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func (s *Session) publicKey() ([]byte, error) {
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response, err := s.Channel.transmitEncrypted(claSCWallet, insExportKey, exportP1Any, exportP2Pubkey, nil)
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if err != nil {
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