]>
Commit | Line | Data |
---|---|---|
107c1cdb ND |
1 | package plugin |
2 | ||
3 | import ( | |
4 | "bytes" | |
5 | "crypto/ecdsa" | |
6 | "crypto/elliptic" | |
7 | "crypto/rand" | |
8 | "crypto/x509" | |
9 | "crypto/x509/pkix" | |
10 | "encoding/pem" | |
11 | "math/big" | |
12 | "time" | |
13 | ) | |
14 | ||
15 | // generateCert generates a temporary certificate for plugin authentication. The | |
16 | // certificate and private key are returns in PEM format. | |
17 | func generateCert() (cert []byte, privateKey []byte, err error) { | |
18 | key, err := ecdsa.GenerateKey(elliptic.P521(), rand.Reader) | |
19 | if err != nil { | |
20 | return nil, nil, err | |
21 | } | |
22 | ||
23 | serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128) | |
24 | sn, err := rand.Int(rand.Reader, serialNumberLimit) | |
25 | if err != nil { | |
26 | return nil, nil, err | |
27 | } | |
28 | ||
29 | host := "localhost" | |
30 | ||
31 | template := &x509.Certificate{ | |
32 | Subject: pkix.Name{ | |
33 | CommonName: host, | |
34 | Organization: []string{"HashiCorp"}, | |
35 | }, | |
36 | DNSNames: []string{host}, | |
37 | ExtKeyUsage: []x509.ExtKeyUsage{ | |
38 | x509.ExtKeyUsageClientAuth, | |
39 | x509.ExtKeyUsageServerAuth, | |
40 | }, | |
41 | KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment | x509.KeyUsageKeyAgreement | x509.KeyUsageCertSign, | |
42 | BasicConstraintsValid: true, | |
43 | SerialNumber: sn, | |
44 | NotBefore: time.Now().Add(-30 * time.Second), | |
45 | NotAfter: time.Now().Add(262980 * time.Hour), | |
46 | IsCA: true, | |
47 | } | |
48 | ||
49 | der, err := x509.CreateCertificate(rand.Reader, template, template, key.Public(), key) | |
50 | if err != nil { | |
51 | return nil, nil, err | |
52 | } | |
53 | ||
54 | var certOut bytes.Buffer | |
55 | if err := pem.Encode(&certOut, &pem.Block{Type: "CERTIFICATE", Bytes: der}); err != nil { | |
56 | return nil, nil, err | |
57 | } | |
58 | ||
59 | keyBytes, err := x509.MarshalECPrivateKey(key) | |
60 | if err != nil { | |
61 | return nil, nil, err | |
62 | } | |
63 | ||
64 | var keyOut bytes.Buffer | |
65 | if err := pem.Encode(&keyOut, &pem.Block{Type: "EC PRIVATE KEY", Bytes: keyBytes}); err != nil { | |
66 | return nil, nil, err | |
67 | } | |
68 | ||
69 | cert = certOut.Bytes() | |
70 | privateKey = keyOut.Bytes() | |
71 | ||
72 | return cert, privateKey, nil | |
73 | } |