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package main
import (
"crypto/x509"
"encoding/pem"
"fmt"
"io/ioutil"
"os"
"sort"
)
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 readTLS(filename string) (map[string]*x509.Certificate, error) {
file, err := os.Open(filename)
if err != nil {
return nil, err
}
data, err := ioutil.ReadAll(file)
if err != nil {
return nil, err
}
ret := make(map[string]*x509.Certificate)
for len(data) > 0 {
var certPem *pem.Block
certPem, data = pem.Decode(data)
certX509, err := x509.ParseCertificate(certPem.Bytes)
if err != nil {
return nil, err
}
ret[certX509.Subject.CommonName] = certX509
}
return ret, nil
}
func readCrtSh(filename string, hosts []string) (map[string]*x509.Certificate, error) {
file, err := os.Open(filename)
if err != nil {
return nil, err
}
data, err := ioutil.ReadAll(file)
if err != nil {
return nil, err
}
ret := make(map[string]*x509.Certificate)
for len(data) > 0 {
var certPem *pem.Block
certPem, data = pem.Decode(data)
certX509, err := x509.ParseCertificate(certPem.Bytes)
if err != nil {
return nil, err
}
for _, host := range hosts {
if certX509.VerifyHostname(host) == nil {
if old, haveold := ret[host]; !haveold || certX509.NotBefore.After(old.NotBefore) {
ret[host] = certX509
}
}
}
}
return ret, nil
}
func keys(m map[string]*x509.Certificate) []string {
ret := make([]string, len(m))
i := 0
for k := range m {
ret[i] = k
i++
}
sort.Strings(ret)
return ret
}
func fmtCert(cert *x509.Certificate) string {
return fmt.Sprintf("%s %s %s",
cert.Subject.CommonName,
cert.NotBefore.Format("2006-01-02 15:04:05 MST(-07)"),
cert.NotAfter.Format("2006-01-02 15:04:05 MST(-07)"))
}
func main() {
if len(os.Args) != 3 {
fmt.Fprintf(os.Stderr, "Usage: %s TLS-file crt.sh-file\n", os.Args[0])
}
certsTLS, err := readTLS(os.Args[1])
handleErr(err, "Could load TLS file: %v\n")
hostsTLS := keys(certsTLS)
certsCrtSh, err := readCrtSh(os.Args[2], hostsTLS)
handleErr(err, "Could load crt.sh file: %v\n")
fmt.Printf("--- %s\n", os.Args[1])
fmt.Printf("+++ %s\n", os.Args[2])
fmt.Printf("@@ -1,%d +1,%d @@\n", len(hostsTLS), len(hostsTLS))
for _, host := range hostsTLS {
certTLS := certsTLS[host]
certCrtSh, okCrtSh := certsCrtSh[host]
if !okCrtSh {
fmt.Printf("-%s %s\n", host, fmtCert(certTLS))
} else if !certTLS.Equal(certCrtSh) {
fmt.Printf("-%s %s\n", host, fmtCert(certTLS))
fmt.Printf("+%s %s\n", host, fmtCert(certCrtSh))
} else {
fmt.Printf(" %s %s\n", host, fmtCert(certTLS))
}
}
}
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