Extract certificate message processing in Go.
TLS 1.2 and 1.3 will both need to call it at different points. Change-Id: Id62ec289213aa6c06ebe5fe65a57ca6c2b53d538 Reviewed-on: https://boringssl-review.googlesource.com/8600 Reviewed-by: David Benjamin <davidben@google.com>
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@ -392,53 +392,16 @@ func (hs *clientHandshakeState) doFullHandshake() error {
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}
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certMsg, ok := msg.(*certificateMsg)
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if !ok || len(certMsg.certificates) == 0 {
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if !ok {
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c.sendAlert(alertUnexpectedMessage)
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return unexpectedMessageError(certMsg, msg)
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}
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hs.writeServerHash(certMsg.marshal())
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certs := make([]*x509.Certificate, len(certMsg.certificates))
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for i, asn1Data := range certMsg.certificates {
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cert, err := x509.ParseCertificate(asn1Data)
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if err != nil {
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c.sendAlert(alertBadCertificate)
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return errors.New("tls: failed to parse certificate from server: " + err.Error())
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}
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certs[i] = cert
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}
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leaf = certs[0]
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if !c.config.InsecureSkipVerify {
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opts := x509.VerifyOptions{
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Roots: c.config.RootCAs,
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CurrentTime: c.config.time(),
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DNSName: c.config.ServerName,
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Intermediates: x509.NewCertPool(),
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}
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for i, cert := range certs {
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if i == 0 {
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continue
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}
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opts.Intermediates.AddCert(cert)
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}
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c.verifiedChains, err = leaf.Verify(opts)
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if err != nil {
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c.sendAlert(alertBadCertificate)
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if err := hs.verifyCertificates(certMsg); err != nil {
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return err
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}
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}
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switch leaf.PublicKey.(type) {
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case *rsa.PublicKey, *ecdsa.PublicKey:
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break
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default:
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c.sendAlert(alertUnsupportedCertificate)
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return fmt.Errorf("tls: server's certificate contains an unsupported type of public key: %T", leaf.PublicKey)
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}
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c.peerCertificates = certs
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leaf = c.peerCertificates[0]
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}
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if hs.serverHello.extensions.ocspStapling {
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@ -603,6 +566,58 @@ func (hs *clientHandshakeState) doFullHandshake() error {
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return nil
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}
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func (hs *clientHandshakeState) verifyCertificates(certMsg *certificateMsg) error {
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c := hs.c
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if len(certMsg.certificates) == 0 {
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c.sendAlert(alertIllegalParameter)
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return errors.New("tls: no certificates sent")
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}
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certs := make([]*x509.Certificate, len(certMsg.certificates))
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for i, asn1Data := range certMsg.certificates {
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cert, err := x509.ParseCertificate(asn1Data)
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if err != nil {
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c.sendAlert(alertBadCertificate)
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return errors.New("tls: failed to parse certificate from server: " + err.Error())
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}
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certs[i] = cert
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}
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if !c.config.InsecureSkipVerify {
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opts := x509.VerifyOptions{
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Roots: c.config.RootCAs,
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CurrentTime: c.config.time(),
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DNSName: c.config.ServerName,
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Intermediates: x509.NewCertPool(),
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}
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for i, cert := range certs {
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if i == 0 {
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continue
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}
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opts.Intermediates.AddCert(cert)
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}
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var err error
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c.verifiedChains, err = certs[0].Verify(opts)
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if err != nil {
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c.sendAlert(alertBadCertificate)
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return err
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}
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}
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switch certs[0].PublicKey.(type) {
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case *rsa.PublicKey, *ecdsa.PublicKey:
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break
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default:
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c.sendAlert(alertUnsupportedCertificate)
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return fmt.Errorf("tls: server's certificate contains an unsupported type of public key: %T", certs[0].PublicKey)
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}
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c.peerCertificates = certs
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return nil
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}
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func (hs *clientHandshakeState) establishKeys() error {
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c := hs.c
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