/
vault.go
110 lines (90 loc) · 2.33 KB
/
vault.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
package vaulted
import (
"errors"
"os"
"os/exec"
"strings"
"time"
"github.com/miquella/ask"
)
const (
DefaultSessionName = "VaultedSession"
)
var STSDurationDefault = time.Hour
var (
ErrInvalidCommand = errors.New("Invalid command")
ErrNoTokenEntered = errors.New("Could not get MFA code")
)
type Vault struct {
Duration time.Duration `json:"duration,omitempty"`
AWSKey *AWSKey `json:"aws_key,omitempty"`
Vars map[string]string `json:"vars,omitempty"`
SSHKeys map[string]string `json:"ssh_keys,omitempty"`
}
func (v *Vault) CreateSession(name string) (*Session, error) {
var duration time.Duration
if v.Duration == 0 {
duration = STSDurationDefault
} else {
duration = v.Duration
}
s := &Session{
Name: name,
Vars: make(map[string]string),
Expiration: time.Now().Add(duration).Truncate(time.Second),
}
// copy the vault vars to the session
for key, value := range v.Vars {
s.Vars[key] = value
}
// copy the vault ssh keys to the session
if len(v.SSHKeys) > 0 {
s.SSHKeys = make(map[string]string)
for key, value := range v.SSHKeys {
s.SSHKeys[key] = value
}
}
// get aws creds
if v.AWSKey != nil && v.AWSKey.ID != "" && v.AWSKey.Secret != "" {
var err error
s.AWSCreds, err = v.AWSKey.GetAWSCredentials(duration)
if err != nil {
return nil, err
}
}
return s, nil
}
type AWSKey struct {
AWSCredentials
MFA string `json:"mfa,omitempty"`
Role string `json:"role,omitempty"`
ForgoTempCredGeneration bool `json:"forgoTempCredGeneration"`
}
func (k *AWSKey) GetAWSCredentials(duration time.Duration) (*AWSCredentials, error) {
if k.ForgoTempCredGeneration {
creds := k.AWSCredentials
return &creds, nil
}
if k.MFA == "" {
return k.AWSCredentials.GetSessionToken(duration)
}
tokenCode, err := getTokenCode()
if err != nil {
return nil, err
}
return k.AWSCredentials.GetSessionTokenWithMFA(k.MFA, tokenCode, duration)
}
func getTokenCode() (string, error) {
prompt := "Enter your MFA code: "
if os.Getenv("VAULTED_ASKPASS") != "" {
cmd := exec.Command(os.Getenv("VAULTED_ASKPASS"), prompt)
output, err := cmd.Output()
if err != nil {
return "", ErrNoTokenEntered
}
return strings.TrimSpace(string(output)), nil
} else {
tokenCode, err := ask.Ask(prompt)
return strings.TrimSpace(tokenCode), err
}
}