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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
package certinfo
import (
"crypto/tls"
"crypto/x509"
"crypto/x509/pkix"
"errors"
"fmt"
"io/ioutil"
"net"
"strings"
"time"
"github.com/cloudflare/cfssl/helpers"
)
// Certificate represents a JSON description of an X.509 certificate.
type Certificate struct {
Subject Name `json:"subject,omitempty"`
Issuer Name `json:"issuer,omitempty"`
SerialNumber string `json:"serial_number,omitempty"`
SANs []string `json:"sans,omitempty"`
NotBefore time.Time `json:"not_before"`
NotAfter time.Time `json:"not_after"`
SignatureAlgorithm string `json:"sigalg"`
AKI string `json:"authority_key_id"`
SKI string `json:"subject_key_id"`
RawPEM string `json:"pem"`
}
// Name represents a JSON description of a PKIX Name
type Name struct {
CommonName string `json:"common_name,omitempty"`
SerialNumber string `json:"serial_number,omitempty"`
Country string `json:"country,omitempty"`
Organization string `json:"organization,omitempty"`
OrganizationalUnit string `json:"organizational_unit,omitempty"`
Locality string `json:"locality,omitempty"`
Province string `json:"province,omitempty"`
StreetAddress string `json:"street_address,omitempty"`
PostalCode string `json:"postal_code,omitempty"`
Names []interface{} `json:"names,omitempty"`
//ExtraNames []interface{} `json:"extra_names,omitempty"`
}
// ParseName parses a new name from a *pkix.Name
func ParseName(name pkix.Name) Name {
n := Name{
CommonName: name.CommonName,
SerialNumber: name.SerialNumber,
Country: strings.Join(name.Country, ","),
Organization: strings.Join(name.Organization, ","),
OrganizationalUnit: strings.Join(name.OrganizationalUnit, ","),
Locality: strings.Join(name.Locality, ","),
Province: strings.Join(name.Province, ","),
StreetAddress: strings.Join(name.StreetAddress, ","),
PostalCode: strings.Join(name.PostalCode, ","),
}
for i := range name.Names {
n.Names = append(n.Names, name.Names[i].Value)
}
// ExtraNames aren't supported in Go 1.4
// for i := range name.ExtraNames {
// n.ExtraNames = append(n.ExtraNames, name.ExtraNames[i].Value)
// }
return n
}
func formatKeyID(id []byte) string {
var s string
for i, c := range id {
if i > 0 {
s += ":"
}
s += fmt.Sprintf("%X", c)
}
return s
}
// ParseCertificate parses an x509 certificate.
func ParseCertificate(cert *x509.Certificate) *Certificate {
c := &Certificate{
RawPEM: string(helpers.EncodeCertificatePEM(cert)),
SignatureAlgorithm: helpers.SignatureString(cert.SignatureAlgorithm),
NotBefore: cert.NotBefore,
NotAfter: cert.NotAfter,
Subject: ParseName(cert.Subject),
Issuer: ParseName(cert.Issuer),
SANs: cert.DNSNames,
AKI: formatKeyID(cert.AuthorityKeyId),
SKI: formatKeyID(cert.SubjectKeyId),
SerialNumber: cert.SerialNumber.String(),
}
for _, ip := range cert.IPAddresses {
c.SANs = append(c.SANs, ip.String())
}
return c
}
// ParseCertificateFile parses x509 certificate file.
func ParseCertificateFile(certFile string) (*Certificate, error) {
certPEM, err := ioutil.ReadFile(certFile)
if err != nil {
return nil, err
}
return ParseCertificatePEM(certPEM)
}
// ParseCertificatePEM parses an x509 certificate PEM.
func ParseCertificatePEM(certPEM []byte) (*Certificate, error) {
cert, err := helpers.ParseCertificatePEM(certPEM)
if err != nil {
return nil, err
}
return ParseCertificate(cert), nil
}
// ParseCSRPEM uses the helper to parse an x509 CSR PEM.
func ParseCSRPEM(csrPEM []byte) (*x509.CertificateRequest, error) {
csrObject, err := helpers.ParseCSRPEM(csrPEM)
if err != nil {
return nil, err
}
return csrObject, nil
}
// ParseCSRFile uses the helper to parse an x509 CSR PEM file.
func ParseCSRFile(csrFile string) (*x509.CertificateRequest, error) {
csrPEM, err := ioutil.ReadFile(csrFile)
if err != nil {
return nil, err
}
return ParseCSRPEM(csrPEM)
}
// ParseCertificateDomain parses the certificate served by the given domain.
func ParseCertificateDomain(domain string) (cert *Certificate, err error) {
var host, port string
if host, port, err = net.SplitHostPort(domain); err != nil {
host = domain
port = "443"
}
var conn *tls.Conn
conn, err = tls.DialWithDialer(&net.Dialer{Timeout: 10 * time.Second}, "tcp", net.JoinHostPort(host, port), &tls.Config{InsecureSkipVerify: true})
if err != nil {
return
}
defer conn.Close()
if len(conn.ConnectionState().PeerCertificates) == 0 {
return nil, errors.New("received no server certificates")
}
cert = ParseCertificate(conn.ConnectionState().PeerCertificates[0])
return
}
|
