86 lines
2.8 KiB
Go
86 lines
2.8 KiB
Go
package utils
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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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"path/filepath"
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"strings"
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"github.com/authelia/authelia/v4/internal/configuration/schema"
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"github.com/authelia/authelia/v4/internal/logging"
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)
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// NewTLSConfig generates a tls.Config from a schema.TLSConfig and a x509.CertPool.
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func NewTLSConfig(config *schema.TLSConfig, defaultMinVersion uint16, certPool *x509.CertPool) (tlsConfig *tls.Config) {
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minVersion, err := TLSStringToTLSConfigVersion(config.MinimumVersion)
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if err != nil {
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minVersion = defaultMinVersion
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}
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return &tls.Config{
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ServerName: config.ServerName,
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InsecureSkipVerify: config.SkipVerify, //nolint:gosec // Informed choice by user. Off by default.
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MinVersion: minVersion,
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RootCAs: certPool,
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}
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}
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// NewX509CertPool generates a x509.CertPool from the system PKI and the directory specified.
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func NewX509CertPool(directory string) (certPool *x509.CertPool, warnings []error, errors []error) {
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certPool, err := x509.SystemCertPool()
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if err != nil {
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warnings = append(warnings, fmt.Errorf("could not load system certificate pool which may result in untrusted certificate issues: %v", err))
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certPool = x509.NewCertPool()
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}
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logger := logging.Logger()
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logger.Tracef("Starting scan of directory %s for certificates", directory)
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if directory != "" {
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certsFileInfo, err := ioutil.ReadDir(directory)
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if err != nil {
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errors = append(errors, fmt.Errorf("could not read certificates from directory %v", err))
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} else {
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for _, certFileInfo := range certsFileInfo {
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nameLower := strings.ToLower(certFileInfo.Name())
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if !certFileInfo.IsDir() && (strings.HasSuffix(nameLower, ".cer") || strings.HasSuffix(nameLower, ".crt") || strings.HasSuffix(nameLower, ".pem")) {
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certPath := filepath.Join(directory, certFileInfo.Name())
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logger.Tracef("Found possible cert %s, attempting to add it to the pool", certPath)
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certBytes, err := ioutil.ReadFile(certPath)
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if err != nil {
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errors = append(errors, fmt.Errorf("could not read certificate %v", err))
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} else if ok := certPool.AppendCertsFromPEM(certBytes); !ok {
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errors = append(errors, fmt.Errorf("could not import certificate %s", certFileInfo.Name()))
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}
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}
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}
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}
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}
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logger.Tracef("Finished scan of directory %s for certificates", directory)
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return certPool, warnings, errors
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}
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// TLSStringToTLSConfigVersion returns a go crypto/tls version for a tls.Config based on string input.
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func TLSStringToTLSConfigVersion(input string) (version uint16, err error) {
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switch strings.ToUpper(input) {
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case "TLS1.3", TLS13:
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return tls.VersionTLS13, nil
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case "TLS1.2", TLS12:
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return tls.VersionTLS12, nil
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case "TLS1.1", TLS11:
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return tls.VersionTLS11, nil
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case "TLS1.0", TLS10:
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return tls.VersionTLS10, nil
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}
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return 0, ErrTLSVersionNotSupported
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}
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