Implement CSRF protection
This commit adds CSRF protection based on the gorilla/csrf package. Node dependencies have been updated. Logging uses sirupsen/logrus for log level support now.
This commit is contained in:
parent
e13c9d174b
commit
1f8c44689e
6 changed files with 7088 additions and 710 deletions
2
go.mod
2
go.mod
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@ -4,7 +4,9 @@ go 1.13
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require (
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github.com/BurntSushi/toml v0.3.1
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github.com/gorilla/csrf v1.7.0
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github.com/nicksnyder/go-i18n/v2 v2.1.1
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github.com/sirupsen/logrus v1.7.0
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golang.org/x/text v0.3.4
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gopkg.in/yaml.v2 v2.4.0 // indirect
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)
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16
go.sum
16
go.sum
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@ -1,7 +1,23 @@
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github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
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github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/gorilla/csrf v1.7.0 h1:mMPjV5/3Zd460xCavIkppUdvnl5fPXMpv2uz2Zyg7/Y=
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github.com/gorilla/csrf v1.7.0/go.mod h1:+a/4tCmqhG6/w4oafeAZ9pEa3/NZOWYVbD9fV0FwIQA=
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github.com/gorilla/securecookie v1.1.1 h1:miw7JPhV+b/lAHSXz4qd/nN9jRiAFV5FwjeKyCS8BvQ=
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github.com/gorilla/securecookie v1.1.1/go.mod h1:ra0sb63/xPlUeL+yeDciTfxMRAA+MP+HVt/4epWDjd4=
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github.com/nicksnyder/go-i18n/v2 v2.1.1 h1:ATCOanRDlrfKVB4WHAdJnLEqZtDmKYsweqsOUYflnBU=
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github.com/nicksnyder/go-i18n/v2 v2.1.1/go.mod h1:d++QJC9ZVf7pa48qrsRWhMJ5pSHIPmS3OLqK1niyLxs=
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github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
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github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/sirupsen/logrus v1.7.0 h1:ShrD1U9pZB12TX0cVy0DtePoCH97K8EtX+mg7ZARUtM=
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github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
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github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
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github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
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golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
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golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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golang.org/x/text v0.3.4 h1:0YWbFKbhXG/wIiuHDSKpS0Iy7FSA+u45VtBMfQcFTTc=
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golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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44
main.go
44
main.go
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@ -2,19 +2,22 @@ package main
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import (
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"bytes"
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"crypto/rand"
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"crypto/tls"
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"encoding/json"
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"fmt"
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"html/template"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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"os/exec"
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"strings"
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"time"
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"github.com/BurntSushi/toml"
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"github.com/gorilla/csrf"
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"github.com/nicksnyder/go-i18n/v2/i18n"
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log "github.com/sirupsen/logrus"
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"golang.org/x/text/language"
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)
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@ -32,13 +35,28 @@ type responseData struct {
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func (h *signCertificate) sign(csrPem string, commonName string) (certPem string, err error) {
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log.Printf("received CSR for %s:\n\n%s", commonName, csrPem)
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subjectDN := fmt.Sprintf("/CN=%s", commonName)
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err = ioutil.WriteFile("in.pem", []byte(csrPem), 0644)
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if err != nil {
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log.Print(err)
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var csrFile *os.File
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if csrFile, err = ioutil.TempFile("", "*.csr.pem"); err != nil {
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log.Errorf("could not open temporary file: %s", err)
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return
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}
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if _, err = csrFile.Write([]byte(csrPem)); err != nil {
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log.Errorf("could not write CSR to file: %s", err)
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return
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}
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if err = csrFile.Close(); err != nil {
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log.Errorf("could not close CSR file: %s", err)
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return
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}
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defer func(file *os.File) {
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err = os.Remove(file.Name())
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if err != nil {
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log.Errorf("could not remove temporary file: %s", err)
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}
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}(csrFile)
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opensslCommand := exec.Command(
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"openssl", "ca", "-config", "ca.cnf", "-days", "365",
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"openssl", "ca", "-config", "ca.cnf",
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"-policy", "policy_match", "-extensions", "client_ext",
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"-batch", "-subj", subjectDN, "-utf8", "-rand_serial", "-in", "in.pem")
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var out, cmdErr bytes.Buffer
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@ -159,6 +177,7 @@ func (i *indexHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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"CSRButtonLabel": csrButtonLabel,
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"StatusLoading": statusLoading,
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"SendCSRButtonLabel": sendCSRButtonLabel,
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csrf.TemplateTag: csrf.TemplateField(r),
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})
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if err != nil {
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log.Panic(err)
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@ -207,6 +226,18 @@ func (j *jsLocalesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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}
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}
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func generateRandomBytes(count int) []byte {
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randomBytes := make([]byte, count)
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_, err := rand.Read(randomBytes)
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if err != nil {
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log.Fatalf("could not read random bytes: %v", err)
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return nil
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}
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return randomBytes
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}
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func main() {
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tlsConfig := &tls.Config{
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CipherSuites: []uint16{
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@ -227,6 +258,7 @@ func main() {
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}
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mux := http.NewServeMux()
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csrfKey := generateRandomBytes(32)
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mux.Handle("/sign/", &signCertificate{})
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mux.Handle("/", &indexHandler{Bundle: bundle})
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fileServer := http.FileServer(http.Dir("./public"))
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@ -235,7 +267,7 @@ func main() {
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mux.Handle("/locales/", &jsLocalesHandler{Bundle: bundle})
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server := http.Server{
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Addr: ":8000",
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Handler: mux,
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Handler: csrf.Protect(csrfKey, csrf.FieldName("csrfToken"), csrf.RequestHeader("X-CSRF-Token"))(mux),
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TLSConfig: tlsConfig,
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ReadTimeout: 20 * time.Second,
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ReadHeaderTimeout: 5 * time.Second,
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7718
package-lock.json
generated
7718
package-lock.json
generated
File diff suppressed because it is too large
Load diff
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@ -61,7 +61,8 @@
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<div class="row">
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<div class="col-12">
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<div id="result">
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<button type="button" disabled id="send-button" class="btn btn-default disabled">Send signing request</button>
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<button type="button" disabled id="send-button" class="btn btn-default disabled">Send signing request
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</button>
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</div>
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</div>
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</div>
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@ -91,6 +92,10 @@
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}
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document.addEventListener("DOMContentLoaded", function () {
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i18n.init({fallbackLng: 'en', debug: true}, (err) => {
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if (err) return console.log('something went wrong loading', err);
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});
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const keyElement = document.getElementById('key');
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document.getElementById('csr-form').onsubmit = function (event) {
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const subject = event.target["nameInput"].value;
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@ -6,7 +6,7 @@
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<!-- Bootstrap CSS -->
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<link rel="stylesheet" href="css/styles.min.css"
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integrity="sha384-z6vVrRFOae08oK23yt6itLI8bfPDebhJw60IbTu43zFoAELolv/CiNUBScry21Fa" crossorigin="anonymous">
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integrity="sha384-vKuz4xd0kXa+x9wRdibDAVE8gXC/1up2T9QVSas8Rk07AZhzOzbwFdj00XUjOO4i" crossorigin="anonymous">
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<meta name="theme-color" content="#ffffff">
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<title>{{ .Title }}</title>
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@ -17,6 +17,7 @@
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<div class="row">
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<div class="col-12">
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<form id="csr-form">
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{{ .csrfField }}
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<div class="form-group">
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<label for="nameInput">{{ .NameLabel }}</label>
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<input type="text" class="form-control" id="nameInput" aria-describedby="nameHelp" required
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@ -79,7 +80,7 @@
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<script src="js/i18next.min.js" integrity="sha384-Juj1kpjwKBUTV6Yp9WHG4GdeoMxCmx0zBN9SkwlyrAh5QYWb3l4WrfG7oTv/b00a"
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crossorigin="anonymous"></script>
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<script>
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async function postData(url = '', data = {}) {
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async function postData(url = '', data = {}, csrfToken) {
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const response = await fetch(url, {
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method: 'POST',
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mode: 'cors',
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credentials: 'same-origin',
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headers: {
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'Content-Type': 'application/json',
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'X-CSRF-Token': csrfToken,
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},
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redirect: "error",
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referrerPolicy: "no-referrer",
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@ -104,6 +106,7 @@
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document.getElementById('csr-form').onsubmit = function (event) {
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const subject = event.target["nameInput"].value;
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const password = event.target["passwordInput"].value;
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const csrfToken = event.target["csrfToken"].value;
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const keySize = parseInt(event.target["keySize"].value);
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if (isNaN(keySize)) {
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return false;
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@ -145,7 +148,7 @@
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const sendButton =
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document.getElementById("send-button");
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sendButton.addEventListener("click", function () {
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postData("/sign/", {"csr": csrPem, "commonName": subject})
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postData("/sign/", {"csr": csrPem, "commonName": subject}, csrfToken)
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.then(data => {
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console.log(data);
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document.getElementById("crt").innerHTML = data["certificate"];
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