mirror of
https://github.com/gravitational/teleport.git
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95 lines
3.0 KiB
Go
95 lines
3.0 KiB
Go
/*
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Copyright 2021 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package utils
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import (
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"errors"
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"net"
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"strings"
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"syscall"
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"github.com/gravitational/trace"
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"github.com/gravitational/teleport/api/constants"
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)
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// IsUseOfClosedNetworkError returns true if the specified error
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// indicates the use of a closed network connection.
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func IsUseOfClosedNetworkError(err error) bool {
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if err == nil {
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return false
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}
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return errors.Is(err, net.ErrClosed) || strings.Contains(err.Error(), constants.UseOfClosedNetworkConnection)
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}
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// IsFailedToSendCloseNotifyError returns true if the provided error is the
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// "tls: failed to send closeNotify".
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func IsFailedToSendCloseNotifyError(err error) bool {
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if err == nil {
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return false
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}
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return strings.Contains(err.Error(), constants.FailedToSendCloseNotify)
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}
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// IsOKNetworkError returns true if the provided error received from a network
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// operation is one of those that usually indicate normal connection close. If
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// the error is a trace.Aggregate, all the errors must be OK network errors.
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func IsOKNetworkError(err error) bool {
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// trace.Aggregate contains at least one error and all the errors are
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// non-nil
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if a, ok := trace.Unwrap(err).(trace.Aggregate); ok {
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for _, err := range a.Errors() {
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if !IsOKNetworkError(err) {
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return false
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}
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}
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return true
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}
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return trace.IsEOF(err) || IsUseOfClosedNetworkError(err) || IsFailedToSendCloseNotifyError(err)
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}
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// IsConnectionRefused returns true if the given err is "connection refused" error.
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func IsConnectionRefused(err error) bool {
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var errno syscall.Errno
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if errors.As(err, &errno) {
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return errno == syscall.ECONNREFUSED
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}
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return false
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}
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// IsExpiredCredentialError checks if an error corresponds to expired credentials.
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func IsExpiredCredentialError(err error) bool {
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return IsHandshakeFailedError(err) || IsCertExpiredError(err) || trace.IsBadParameter(err) || trace.IsTrustError(err)
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}
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// IsUntrustedCertErr checks if an error is an untrusted cert error.
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func IsUntrustedCertErr(err error) bool {
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if err == nil {
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return false
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}
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errMsg := err.Error()
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return strings.Contains(errMsg, "x509: certificate is valid for") ||
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strings.Contains(errMsg, "certificate is not trusted")
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}
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const (
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// SelfSignedCertsMsg is a helper message to point users towards helpful documentation.
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SelfSignedCertsMsg = "Your proxy certificate is not trusted or expired. " +
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"Please update the certificate or follow this guide for self-signed certs: https://goteleport.com/docs/management/admin/self-signed-certs/"
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)
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