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
|
package ssh
import (
"io/ioutil"
"strconv"
"github.com/smallstep/certificates/ca/identity"
"github.com/pkg/errors"
"github.com/smallstep/certificates/api"
"github.com/smallstep/certificates/authority/provisioner"
"github.com/smallstep/cli/command"
"github.com/smallstep/cli/errs"
"github.com/smallstep/cli/flags"
"github.com/smallstep/cli/ui"
"github.com/smallstep/cli/utils"
"github.com/smallstep/cli/utils/cautils"
"github.com/urfave/cli"
"golang.org/x/crypto/ssh"
)
func renewCommand() cli.Command {
return cli.Command{
Name: "renew",
Action: command.ActionFunc(renewAction),
Usage: "renew a SSH certificate using the SSH CA",
UsageText: `**step ssh renew** <ssh-cert> <ssh-key>
[**--out**=<file>] [**--issuer**=<name>] [**--password-file**=<path>]
[**--force**] [**--ca-url**=<uri>] [**--root**=<path>]
[**--offline**] [**--ca-config**=<path>]`,
Description: `**step ssh renew** command renews an SSH Cerfificate
using [step certificates](https://github.com/smallstep/certificates).
It writes the new certificate to disk - either overwriting <ssh-cert> or
using a new file when the **--out**=<file> flag is used.
## POSITIONAL ARGUMENTS
<ssh-cert>
: The ssh certificate to renew.
<ssh-key>
: The ssh certificate private key.
## EXAMPLES
Renew an ssh certificate overwriting the previous one:
'''
$ step ssh renew -f id_ecdsa-cert.pub id_ecdsa
'''
Renew an ssh certificate with a custom out file:
'''
$ step ssh renew -out new-id_ecdsa-cer.pub id_ecdsa-cert.pub id_ecdsa
'''`,
Flags: []cli.Flag{
cli.StringFlag{
Name: "out,output-file",
Usage: "The new certificate <file> path. Defaults to overwriting the <ssh-cert> positional argument",
},
flags.Provisioner,
sshProvisionerPasswordFlag,
flags.Force,
flags.CaURL,
flags.Root,
flags.Offline,
flags.CaConfig,
flags.SSHPOPCert,
flags.SSHPOPKey,
},
}
}
func renewAction(ctx *cli.Context) error {
if err := errs.NumberOfArguments(ctx, 2); err != nil {
return err
}
args := ctx.Args()
certFile := args.Get(0)
keyFile := args.Get(1)
// Flags
outFile := ctx.String("out")
if outFile == "" {
outFile = certFile
}
flow, err := cautils.NewCertificateFlow(ctx)
if err != nil {
return err
}
// Load the cert, because we need the serial number.
certBytes, err := ioutil.ReadFile(certFile)
if err != nil {
return errors.Wrapf(err, "error reading ssh certificate from %s", certFile)
}
sshpub, _, _, _, err := ssh.ParseAuthorizedKey(certBytes)
if err != nil {
return errors.Wrapf(err, "error parsing ssh public key from %s", certFile)
}
cert, ok := sshpub.(*ssh.Certificate)
if !ok {
return errors.New("error casting ssh public key to ssh certificate")
}
serial := strconv.FormatUint(cert.Serial, 10)
ctx.Set("sshpop-cert", certFile)
ctx.Set("sshpop-key", keyFile)
token, err := flow.GenerateSSHToken(ctx, serial, cautils.SSHRenewType, nil, provisioner.TimeDuration{}, provisioner.TimeDuration{})
if err != nil {
return err
}
caClient, err := flow.GetClient(ctx, token)
if err != nil {
return err
}
resp, err := caClient.SSHRenew(&api.SSHRenewRequest{
OTT: token,
})
if err != nil {
return err
}
// Write certificate
if err := utils.WriteFile(outFile, marshalPublicKey(resp.Certificate, cert.KeyId), 0644); err != nil {
return err
}
// Write renewed identity
if len(resp.IdentityCertificate) > 0 {
if err := identity.WriteIdentityCertificate(resp.IdentityCertificate); err != nil {
return err
}
}
ui.PrintSelected("Certificate", outFile)
return nil
}
|
