-
Notifications
You must be signed in to change notification settings - Fork 1
/
pem.go
76 lines (64 loc) 路 1.57 KB
/
pem.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
package pem
import (
"bytes"
"crypto/x509"
"encoding/pem"
"fmt"
"io"
"net/url"
"os"
c "github.com/bakito/cert-fetcher/cert"
)
var (
out io.Writer = os.Stdout // modified during testing
)
// ExportTo ExportTo the certificates from the target URL into a pem file
func ExportTo(targetURL string, certIndexes []int, outputFile string) error {
data, cnt, err := Export(targetURL, certIndexes)
if err != nil {
return err
}
var fileName string
if outputFile != "" {
fileName = outputFile
} else {
u, _ := url.Parse(targetURL)
fileName = u.Host + ".pem"
}
f, err := os.Create(fileName)
if err != nil {
return err
}
defer func() { _ = f.Close() }() // #nosec G307
_, _ = f.Write(data)
_, _ = fmt.Fprintf(out, "pem file %s with %d certificate(s) created.\n", fileName, cnt)
return nil
}
// Export Export the certificates from the target URL
func Export(targetURL string, certIndexes []int) ([]byte, int, error) {
certs, err := c.FetchCertificates(targetURL)
if err != nil {
return nil, 0, err
}
return exportCerts(certs, certIndexes)
}
func exportCerts(certs []*x509.Certificate, certIndexes []int) ([]byte, int, error) {
var pemBytes bytes.Buffer
cnt := 0
for i, cert := range certs {
if c.IsToExport(certIndexes, i) {
c.PrintAdd(i, cert)
err := toPEM(&pemBytes, cert)
if err != nil {
return nil, 0, err
}
cnt++
} else {
c.PrintSkip(i, cert)
}
}
return pemBytes.Bytes(), cnt, nil
}
func toPEM(pemBytes *bytes.Buffer, cert *x509.Certificate) error {
return pem.Encode(pemBytes, &pem.Block{Type: "CERTIFICATE", Bytes: cert.Raw})
}