65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
/*
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Copyright CAcert Inc.
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SPDX-License-Identifier: Apache-2.0
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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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https://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 handlers
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import (
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"crypto/x509"
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"fmt"
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"log/slog"
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"net/http"
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"time"
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)
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func EnableHSTS() func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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const Days180 = 180
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w.Header().Set("Strict-Transport-Security", fmt.Sprintf("max-age=%d", int((time.Hour*24*Days180).Seconds())))
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next.ServeHTTP(w, r)
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})
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}
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}
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func getDataFromClientCert(logger *slog.Logger, r *http.Request) (string, []string) {
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if r.TLS != nil && r.TLS.PeerCertificates != nil && len(r.TLS.PeerCertificates) > 0 {
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firstCert := r.TLS.PeerCertificates[0]
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if !isClientCertificate(firstCert) {
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return "", nil
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}
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for _, email := range firstCert.EmailAddresses {
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logger.Info("authenticated with a client certificate for email address", "email", email)
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}
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return firstCert.Subject.CommonName, firstCert.EmailAddresses
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}
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return "", nil
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}
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func isClientCertificate(cert *x509.Certificate) bool {
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for _, ext := range cert.ExtKeyUsage {
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if ext == x509.ExtKeyUsageClientAuth {
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return true
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}
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}
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return false
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}
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