-
Notifications
You must be signed in to change notification settings - Fork 3
/
config.go
136 lines (106 loc) · 3.54 KB
/
config.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
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
package config
import (
"crypto/tls"
"crypto/x509"
"flag"
"os/exec"
"strings"
"time"
"code.cloudfoundry.org/cflager"
"code.cloudfoundry.org/lager"
"code.cloudfoundry.org/tlsconfig"
"github.com/pivotal-cf-experimental/service-config"
"github.com/pkg/errors"
)
type Config struct {
Command string `yaml:"Command" validate:"nonzero"`
Port int `yaml:"Port" validate:"nonzero"`
PidFile string `yaml:"PidFile" validate:"nonzero"`
Credentials Credentials `yaml:"Credentials" validate:"nonzero"`
TLS TLSConfig `yaml:"TLS"`
Logger lager.Logger
}
type Credentials struct {
Username string `yaml:"Username" validate:"nonzero"`
Password string `yaml:"Password" validate:"nonzero"`
}
type TLSConfig struct {
EnableMutualTLS bool `yaml:"EnableMutualTLS"`
RequiredClientIdentities []string `yaml:"RequiredClientIdentities"`
ServerCert string `yaml:"ServerCert" validate:"nonzero"`
ServerKey string `yaml:"ServerKey" validate:"nonzero"`
ClientCA string `yaml:"ClientCA" validate:"nonzero"`
Config *tls.Config `yaml:"-"`
}
type ClientCertificateVerifierFunc func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error
func (t *TLSConfig) unmarshalTLSConfig() error {
serverCert, err := tls.X509KeyPair([]byte(t.ServerCert), []byte(t.ServerKey))
if err != nil {
return errors.Wrapf(err, `failed to load server certificate or private key`)
}
certConfig := tlsconfig.Build(
tlsconfig.WithInternalServiceDefaults(),
tlsconfig.WithIdentity(serverCert),
)
var configOptions []tlsconfig.ServerOption
var verifyPeerCertificate ClientCertificateVerifierFunc
if t.EnableMutualTLS {
clientCAPool := x509.NewCertPool()
if ok := clientCAPool.AppendCertsFromPEM([]byte(t.ClientCA)); !ok {
return errors.New(`unable to load client CA certificate`)
}
configOptions = append(configOptions,
tlsconfig.WithClientAuthentication(clientCAPool),
)
verifyPeerCertificate = func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
for _, name := range t.RequiredClientIdentities {
opts := x509.VerifyOptions{
Roots: clientCAPool,
CurrentTime: time.Now(),
Intermediates: x509.NewCertPool(),
KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
DNSName: name,
}
if _, err := verifiedChains[0][0].Verify(opts); err == nil {
return nil
}
}
return errors.New("invalid client identity in presented client certificate")
}
}
serverTLSConfig, err := certConfig.Server(configOptions...)
if err != nil {
return errors.Wrap(err, `failed to build server TLS certConfig`)
}
serverTLSConfig.VerifyPeerCertificate = verifyPeerCertificate
t.Config = serverTLSConfig
return nil
}
func NewConfig(osArgs []string) (*Config, error) {
var (
rootConfig Config
)
binaryName := osArgs[0]
configurationOptions := osArgs[1:]
serviceConfig := service_config.New()
flags := flag.NewFlagSet(binaryName, flag.ExitOnError)
cflager.AddFlags(flags)
serviceConfig.AddDefaults(Config{
Port: 8081,
})
serviceConfig.AddFlags(flags)
_ = flags.Parse(configurationOptions)
err := serviceConfig.Read(&rootConfig)
rootConfig.Logger, _ = cflager.New(binaryName)
if err != nil {
return &rootConfig, err
}
if err := rootConfig.TLS.unmarshalTLSConfig(); err != nil {
return &rootConfig, err
}
return &rootConfig, nil
}
func (c Config) Cmd() *exec.Cmd {
fields := strings.Fields(c.Command)
return exec.Command(fields[0], fields[1:]...)
}