250 lines
8 KiB
Go
250 lines
8 KiB
Go
package tls
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import (
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"io/ioutil"
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"os"
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"sort"
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"strings"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/tls/generate"
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)
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var (
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// MinVersion Map of allowed TLS minimum versions
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MinVersion = map[string]uint16{
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`VersionTLS10`: tls.VersionTLS10,
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`VersionTLS11`: tls.VersionTLS11,
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`VersionTLS12`: tls.VersionTLS12,
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`VersionTLS13`: tls.VersionTLS13,
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}
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// CipherSuites Map of TLS CipherSuites from crypto/tls
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// Available CipherSuites defined at https://golang.org/pkg/crypto/tls/#pkg-constants
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CipherSuites = map[string]uint16{
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`TLS_RSA_WITH_RC4_128_SHA`: tls.TLS_RSA_WITH_RC4_128_SHA,
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`TLS_RSA_WITH_3DES_EDE_CBC_SHA`: tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
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`TLS_RSA_WITH_AES_128_CBC_SHA`: tls.TLS_RSA_WITH_AES_128_CBC_SHA,
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`TLS_RSA_WITH_AES_256_CBC_SHA`: tls.TLS_RSA_WITH_AES_256_CBC_SHA,
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`TLS_RSA_WITH_AES_128_CBC_SHA256`: tls.TLS_RSA_WITH_AES_128_CBC_SHA256,
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`TLS_RSA_WITH_AES_128_GCM_SHA256`: tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
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`TLS_RSA_WITH_AES_256_GCM_SHA384`: tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
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`TLS_ECDHE_ECDSA_WITH_RC4_128_SHA`: tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
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`TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA`: tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
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`TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA`: tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
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`TLS_ECDHE_RSA_WITH_RC4_128_SHA`: tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
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`TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA`: tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
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`TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA`: tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
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`TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA`: tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
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`TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256`: tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
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`TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256`: tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
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`TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256`: tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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`TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256`: tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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`TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384`: tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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`TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384`: tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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`TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305`: tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
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`TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305`: tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
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"TLS_AES_128_GCM_SHA256": tls.TLS_AES_128_GCM_SHA256,
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"TLS_AES_256_GCM_SHA384": tls.TLS_AES_256_GCM_SHA384,
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"TLS_CHACHA20_POLY1305_SHA256": tls.TLS_CHACHA20_POLY1305_SHA256,
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"TLS_FALLBACK_SCSV": tls.TLS_FALLBACK_SCSV,
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}
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)
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// Certificate holds a SSL cert/key pair
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// Certs and Key could be either a file path, or the file content itself
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type Certificate struct {
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CertFile FileOrContent
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KeyFile FileOrContent
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}
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// Certificates defines traefik certificates type
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// Certs and Keys could be either a file path, or the file content itself
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type Certificates []Certificate
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// FileOrContent hold a file path or content
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type FileOrContent string
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func (f FileOrContent) String() string {
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return string(f)
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}
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// IsPath returns true if the FileOrContent is a file path, otherwise returns false
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func (f FileOrContent) IsPath() bool {
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_, err := os.Stat(f.String())
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return err == nil
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}
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func (f FileOrContent) Read() ([]byte, error) {
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var content []byte
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if _, err := os.Stat(f.String()); err == nil {
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content, err = ioutil.ReadFile(f.String())
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if err != nil {
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return nil, err
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}
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} else {
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content = []byte(f)
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}
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return content, nil
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}
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// CreateTLSConfig creates a TLS config from Certificate structures
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func (c *Certificates) CreateTLSConfig(entryPointName string) (*tls.Config, error) {
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config := &tls.Config{}
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domainsCertificates := make(map[string]map[string]*tls.Certificate)
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if c.isEmpty() {
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config.Certificates = []tls.Certificate{}
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cert, err := generate.DefaultCertificate()
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if err != nil {
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return nil, err
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}
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config.Certificates = append(config.Certificates, *cert)
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} else {
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for _, certificate := range *c {
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err := certificate.AppendCertificates(domainsCertificates, entryPointName)
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if err != nil {
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log.Errorf("Unable to add a certificate to the entryPoint %q : %v", entryPointName, err)
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continue
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}
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for _, certDom := range domainsCertificates {
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for _, cert := range certDom {
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config.Certificates = append(config.Certificates, *cert)
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}
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}
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}
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}
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return config, nil
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}
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// isEmpty checks if the certificates list is empty
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func (c *Certificates) isEmpty() bool {
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if len(*c) == 0 {
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return true
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}
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var key int
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for _, cert := range *c {
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if len(cert.CertFile.String()) != 0 && len(cert.KeyFile.String()) != 0 {
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break
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}
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key++
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}
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return key == len(*c)
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}
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// AppendCertificates appends a Certificate to a certificates map sorted by entrypoints
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func (c *Certificate) AppendCertificates(certs map[string]map[string]*tls.Certificate, ep string) error {
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certContent, err := c.CertFile.Read()
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if err != nil {
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return fmt.Errorf("unable to read CertFile : %v", err)
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}
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keyContent, err := c.KeyFile.Read()
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if err != nil {
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return fmt.Errorf("unable to read KeyFile : %v", err)
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}
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tlsCert, err := tls.X509KeyPair(certContent, keyContent)
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if err != nil {
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return fmt.Errorf("unable to generate TLS certificate : %v", err)
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}
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parsedCert, _ := x509.ParseCertificate(tlsCert.Certificate[0])
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var SANs []string
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if parsedCert.Subject.CommonName != "" {
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SANs = append(SANs, strings.ToLower(parsedCert.Subject.CommonName))
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}
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if parsedCert.DNSNames != nil {
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sort.Strings(parsedCert.DNSNames)
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for _, dnsName := range parsedCert.DNSNames {
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if dnsName != parsedCert.Subject.CommonName {
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SANs = append(SANs, strings.ToLower(dnsName))
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}
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}
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}
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if parsedCert.IPAddresses != nil {
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for _, ip := range parsedCert.IPAddresses {
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if ip.String() != parsedCert.Subject.CommonName {
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SANs = append(SANs, strings.ToLower(ip.String()))
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}
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}
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}
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certKey := strings.Join(SANs, ",")
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certExists := false
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if certs[ep] == nil {
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certs[ep] = make(map[string]*tls.Certificate)
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} else {
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for domains := range certs[ep] {
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if domains == certKey {
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certExists = true
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break
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}
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}
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}
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if certExists {
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log.Warnf("Into EntryPoint %s, try to add certificate for domains which already have this certificate (%s). The new certificate will not be append to the EntryPoint.", ep, certKey)
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} else {
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log.Debugf("Add certificate for domains %s", certKey)
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certs[ep][certKey] = &tlsCert
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}
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return err
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}
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// GetTruncatedCertificateName truncates the certificate name
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func (c *Certificate) GetTruncatedCertificateName() string {
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certName := c.CertFile.String()
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// Truncate certificate information only if it's a well formed certificate content with more than 50 characters
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if !c.CertFile.IsPath() && strings.HasPrefix(certName, certificateHeader) && len(certName) > len(certificateHeader)+50 {
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certName = strings.TrimPrefix(c.CertFile.String(), certificateHeader)[:50]
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}
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return certName
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}
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// String is the method to format the flag's value, part of the flag.Value interface.
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// The String method's output will be used in diagnostics.
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func (c *Certificates) String() string {
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if len(*c) == 0 {
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return ""
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}
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var result []string
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for _, certificate := range *c {
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result = append(result, certificate.CertFile.String()+","+certificate.KeyFile.String())
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}
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return strings.Join(result, ";")
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}
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// Set is the method to set the flag value, part of the flag.Value interface.
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// Set's argument is a string to be parsed to set the flag.
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// It's a comma-separated list, so we split it.
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func (c *Certificates) Set(value string) error {
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certificates := strings.Split(value, ";")
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for _, certificate := range certificates {
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files := strings.Split(certificate, ",")
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if len(files) != 2 {
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return fmt.Errorf("bad certificates format: %s", value)
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}
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*c = append(*c, Certificate{
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CertFile: FileOrContent(files[0]),
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KeyFile: FileOrContent(files[1]),
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})
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}
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return nil
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}
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// Type is type of the struct
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func (c *Certificates) Type() string {
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return "certificates"
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}
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