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list.go
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list.go
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package ssh
import (
"fmt"
"github.com/pkg/errors"
"github.com/smallstep/cli/internal/sshutil"
"github.com/urfave/cli"
"go.step.sm/cli-utils/command"
"go.step.sm/cli-utils/errs"
libsshutil "go.step.sm/crypto/sshutil"
)
func listCommand() cli.Command {
return cli.Command{
Name: "list",
Action: command.ActionFunc(listAction),
Usage: "list public keys known to the ssh agent",
UsageText: `**step ssh list** [<subject>] [**--raw**]`,
Description: `**step ssh list** list public key identities known to the ssh agent.
By default it prints key fingerprints, to list the raw key use the flag **--raw**.
## POSITIONAL ARGUMENTS
<subject>
: Optional subject or comment to filter keys by.
## EXAMPLES
List all key fingerprints known to the agent:
'''
$ step ssh list
'''
List all the key fingerprints with the comment joe@work:
'''
$ step ssh list joe@work
'''
List all keys known to the agent:
'''
$ step ssh list --raw
'''
List all the keys with the comment joe@work:
'''
$ step ssh list --raw joe@work
'''`,
Flags: []cli.Flag{
cli.BoolFlag{
Name: "raw",
Usage: "List public keys instead of fingerprints.",
},
},
}
}
func listAction(ctx *cli.Context) error {
if err := errs.MinMaxNumberOfArguments(ctx, 0, 1); err != nil {
return err
}
var subject string
if ctx.NArg() > 0 {
subject = ctx.Args().First()
}
agent, err := sshutil.DialAgent()
if err != nil {
return err
}
keys, err := agent.List()
if err != nil {
return errors.Wrap(err, "error listing identities")
}
if len(keys) == 0 {
fmt.Println("The agent has no identities.")
return nil
}
if ctx.Bool("raw") {
for _, k := range keys {
if ctx.NArg() == 0 || k.Comment == subject {
fmt.Println(k.String())
}
}
} else {
for _, k := range keys {
if ctx.NArg() == 0 || k.Comment == subject {
s, err := libsshutil.FormatFingerprint([]byte(k.String()), libsshutil.DefaultFingerprint)
if err != nil {
return err
}
fmt.Println(s)
}
}
}
return nil
}