directories

1 files changed, 109 insertions, 0 deletions

diff --git a/bin-src/diff-pem2html.go b/bin-src/diff-pem2html.go
new file mode 100644
index 0000000..f3b25ff
--- /dev/null
+++ b/bin-src/diff-pem2html.go
@@ -0,0 +1,109 @@
+package main
+
+import (
+	"crypto/x509"
+	"encoding/pem"
+	"fmt"
+	"html/template"
+	"io/ioutil"
+	"os"
+
+	"./util"
+)
+
+func handleErr(err error, str string, a ...interface{}) {
+	a = append([]interface{}{err}, a...)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, str, a...)
+		os.Exit(1)
+	}
+}
+
+func handleBool(ok bool, str string, a ...interface{}) {
+	if !ok {
+		fmt.Fprintf(os.Stderr, str, a...)
+		os.Exit(1)
+	}
+}
+
+var tmpl = template.Must(template.New("pem2html").
+	Funcs(template.FuncMap{
+		"htmlcell": util.HTMLCellEscapeString,
+	}).Parse(`<table class=diff>
+  <tr class="diff-del"><td colspan=4>--- tls.pem</td></tr>
+  <tr class="diff-add"><td colspan=4>+++ crtsh.pem</td></tr>
+  <tr class="diff-dat"><td colspan=4>@@ -1,{{.nTLS}} +1,{{.nCrtSh}} @@</td></tr>
+{{range $cert := .certs}}
+  <tr class={{$cert.Class}}>
+    <td><a href="{{$cert.Url}}">{{$cert.Pfix | htmlcell}}</a></td>
+    <td><a href="{{$cert.Url}}">{{$cert.X509.Subject.CommonName | htmlcell}}</a></td>
+    <td><a href="{{$cert.Url}}">{{$cert.X509.NotBefore.Local.Format "2006-01-02 15:04:05"}}</a></td>
+    <td><a href="{{$cert.Url}}">{{$cert.X509.NotAfter.Local.Format "2006-01-02 15:04:05"}}</a></td>
+  </tr>
+{{end}}
+</table>
+`))
+
+type Cert struct {
+	Url    string
+	action string
+	X509   *x509.Certificate
+}
+
+func (cert Cert) Pfix() string {
+	return map[string]string{
+		"add": "+",
+		"del": "-",
+		"ctx": " ",
+	}[cert.action]
+}
+
+func (cert Cert) Class() string {
+	return "diff-" + cert.action
+}
+
+func main() {
+	data, err := ioutil.ReadAll(os.Stdin)
+	handleErr(err, "Error reading stdin: %v\n")
+
+	var certs []Cert
+	a := 0
+	b := 0
+	for len(data) > 0 {
+		var certPem *pem.Block
+		certPem, data = pem.Decode(data)
+
+		var ok bool
+		var cert Cert
+
+		cert.Url, ok = certPem.Headers["X-Crt-Sh-Url"]
+		handleBool(ok, "Did not get X-Crt-Sh-Url\n")
+
+		cert.action, ok = certPem.Headers["X-Diff-Action"]
+		handleBool(ok, "Did not get X-Diff-Action\n")
+		switch cert.action {
+		case "add":
+			b++
+		case "del":
+			a++
+		case "ctx":
+			a++
+			b++
+		default:
+			handleBool(false, "Unknown X-Diff-Action: %q\n", cert.action)
+		}
+
+		cert.X509, err = x509.ParseCertificate(certPem.Bytes)
+		if err != nil {
+			cert.X509 = new(x509.Certificate)
+		}
+
+		certs = append(certs, cert)
+	}
+
+	handleErr(tmpl.Execute(os.Stdout, map[string]interface{}{
+		"certs":  certs,
+		"nTLS":   a,
+		"nCrtSh": b,
+	}), "Could not execute template: %v\n")
+}