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package main
import (
"crypto/x509"
"encoding/pem"
"fmt"
"html/template"
"io/ioutil"
"os"
)
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("2html").Parse(`<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>CT log accuracy</title>
<style>
html {
height: 100%;
}
body {
font-size: 10px;
font-family: monospace;
height: 100%;
margin: 0;
display: flex;
align-items: center;
}
body > * {
margin: auto;
}
.diff-del, .diff-del a { color: red; }
.diff-add, .diff-add a { color: green; }
.diff-dat, .diff-dat a { color: blue; }
.diff-ctx, .diff-ctx a { color: black; }
tr:hover a {
background-color: #AAAAF3;
}
td a {
text-decoration: none;
padding: 0.1em 0.25em;
display: block;
width: 100%;
height: 100%;
color: black;
}
</style>
<script src="sorttable.js"></script>
<base target="_parent" />
</head>
<body>
<table>
<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}}">{{if eq $cert.Pfix " "}} {{else}}{{$cert.Pfix}}{{end}}</a></td>
<td><a href="{{$cert.Url}}">{{$cert.X509.Subject.CommonName}}</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>
</body>
</html>
`))
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)
handleErr(err, "Error parsing cert: %v\n")
certs = append(certs, cert)
}
handleErr(tmpl.Execute(os.Stdout, map[string]interface{}{
"certs":certs,
"nTLS": a,
"nCrtSh": b,
}), "Could not execute template: %v\n")
}
|
