traefik/tls/tls.go

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package tls
import (
"crypto/tls"
"fmt"
"strings"
"github.com/containous/traefik/log"
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"github.com/sirupsen/logrus"
)
const (
certificateHeader = "-----BEGIN CERTIFICATE-----\n"
)
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// ClientCA defines traefik CA files for a entryPoint
// and it indicates if they are mandatory or have just to be analyzed if provided
type ClientCA struct {
Files []string
Optional bool
}
// TLS configures TLS for an entry point
type TLS struct {
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MinVersion string `export:"true"`
CipherSuites []string
Certificates Certificates
ClientCA ClientCA
DefaultCertificate *Certificate
SniStrict bool `export:"true"`
}
// RootCAs hold the CA we want to have in root
type RootCAs []FileOrContent
// Configuration allows mapping a TLS certificate to a list of entrypoints
type Configuration struct {
EntryPoints []string
Certificate *Certificate
}
// String is the method to format the flag's value, part of the flag.Value interface.
// The String method's output will be used in diagnostics.
func (r *RootCAs) String() string {
sliceOfString := make([]string, len([]FileOrContent(*r)))
for key, value := range *r {
sliceOfString[key] = value.String()
}
return strings.Join(sliceOfString, ",")
}
// Set is the method to set the flag value, part of the flag.Value interface.
// Set's argument is a string to be parsed to set the flag.
// It's a comma-separated list, so we split it.
func (r *RootCAs) Set(value string) error {
rootCAs := strings.Split(value, ",")
if len(rootCAs) == 0 {
return fmt.Errorf("bad RootCAs format: %s", value)
}
for _, rootCA := range rootCAs {
*r = append(*r, FileOrContent(rootCA))
}
return nil
}
// Get return the RootCAs list
func (r *RootCAs) Get() interface{} {
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return *r
}
// SetValue sets the RootCAs with val
func (r *RootCAs) SetValue(val interface{}) {
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*r = val.(RootCAs)
}
// Type is type of the struct
func (r *RootCAs) Type() string {
return "rootcas"
}
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// SortTLSPerEntryPoints converts TLS configuration sorted by Certificates into TLS configuration sorted by EntryPoints
func SortTLSPerEntryPoints(configurations []*Configuration, epConfiguration map[string]map[string]*tls.Certificate, defaultEntryPoints []string) error {
if epConfiguration == nil {
epConfiguration = make(map[string]map[string]*tls.Certificate)
}
for _, conf := range configurations {
if conf.EntryPoints == nil || len(conf.EntryPoints) == 0 {
if log.GetLevel() >= logrus.DebugLevel {
certName := conf.Certificate.CertFile.String()
// Truncate certificate information only if it's a well formed certificate content with more than 50 characters
if !conf.Certificate.CertFile.IsPath() && strings.HasPrefix(conf.Certificate.CertFile.String(), certificateHeader) && len(conf.Certificate.CertFile.String()) > len(certificateHeader)+50 {
certName = strings.TrimPrefix(conf.Certificate.CertFile.String(), certificateHeader)[:50]
}
log.Debugf("No entryPoint is defined to add the certificate %s, it will be added to the default entryPoints: %s", certName, strings.Join(defaultEntryPoints, ", "))
}
conf.EntryPoints = append(conf.EntryPoints, defaultEntryPoints...)
}
for _, ep := range conf.EntryPoints {
if err := conf.Certificate.AppendCertificates(epConfiguration, ep); err != nil {
return err
}
}
}
return nil
}