Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

kv patch command #4432

Merged
merged 2 commits into from
Apr 23, 2018
Merged
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 7 additions & 0 deletions command/commands.go
Original file line number Diff line number Diff line change
Expand Up @@ -695,6 +695,13 @@ func initCommands(ui, serverCmdUi cli.Ui, runOpts *RunOptions) {
},
}, nil
},
"kv patch": func() (cli.Command, error) {
return &KVPatchCommand{
BaseCommand: &BaseCommand{
UI: ui,
},
}, nil
},
"kv get": func() (cli.Command, error) {
return &KVGetCommand{
BaseCommand: &BaseCommand{
Expand Down
195 changes: 195 additions & 0 deletions command/kv_patch.go
Original file line number Diff line number Diff line change
@@ -0,0 +1,195 @@
package command

import (
"fmt"
"io"
"os"
"strings"

"github.com/mitchellh/cli"
"github.com/posener/complete"
)

var _ cli.Command = (*KVPatchCommand)(nil)
var _ cli.CommandAutocomplete = (*KVPatchCommand)(nil)

type KVPatchCommand struct {
*BaseCommand

testStdin io.Reader // for tests
}

func (c *KVPatchCommand) Synopsis() string {
return "Sets or updates data in the KV store without overwriting."
}

func (c *KVPatchCommand) Help() string {
helpText := `
Usage: vault kv put [options] KEY [DATA]
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

put -> patch

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Fixed


*NOTE*: This is only supported for KV v2 engine mounts.

Writes the data to the given path in the key-value store. The data can be of
any type.

$ vault kv patch secret/foo bar=baz

The data can also be consumed from a file on disk by prefixing with the "@"
symbol. For example:

$ vault kv patch secret/foo @data.json

Or it can be read from stdin using the "-" symbol:

$ echo "abcd1234" | vault kv patch secret/foo bar=-

Additional flags and more advanced use cases are detailed below.

` + c.Flags().Help()
return strings.TrimSpace(helpText)
}

func (c *KVPatchCommand) Flags() *FlagSets {
set := c.flagSet(FlagSetHTTP | FlagSetOutputField | FlagSetOutputFormat)

return set
}

func (c *KVPatchCommand) AutocompleteArgs() complete.Predictor {
return nil
}

func (c *KVPatchCommand) AutocompleteFlags() complete.Flags {
return c.Flags().Completions()
}

func (c *KVPatchCommand) Run(args []string) int {
f := c.Flags()

if err := f.Parse(args); err != nil {
c.UI.Error(err.Error())
return 1
}

args = f.Args()
// Pull our fake stdin if needed
stdin := (io.Reader)(os.Stdin)
if c.testStdin != nil {
stdin = c.testStdin
}

switch {
case len(args) < 1:
c.UI.Error(fmt.Sprintf("Not enough arguments (expected >1, got %d)", len(args)))
return 1
case len(args) == 1:
c.UI.Error("Must supply data")
return 1
}

var err error
path := sanitizePath(args[0])

client, err := c.Client()
if err != nil {
c.UI.Error(err.Error())
return 2
}

newData, err := parseArgsData(stdin, args[1:])
if err != nil {
c.UI.Error(fmt.Sprintf("Failed to parse K=V data: %s", err))
return 1
}

mountPath, v2, err := isKVv2(path, client)
if err != nil {
c.UI.Error(err.Error())
return 2
}

if !v2 {
c.UI.Error(fmt.Sprintf("K/V engine mount must be version 2 for patch support"))
return 2
}

path = addPrefixToVKVPath(path, mountPath, "data")
if err != nil {
c.UI.Error(err.Error())
return 2
}

// First, do a read
secret, err := kvReadRequest(client, path, nil)
if err != nil {
c.UI.Error(fmt.Sprintf("Error doing pre-read at %s: %s", path, err))
return 2
}

// Make sure a value already exists
if secret == nil || secret.Data == nil {
c.UI.Error(fmt.Sprintf("No value found at %s", path))
return 2
}

// Verify metadata found
rawMeta, ok := secret.Data["metadata"]
if !ok || rawMeta == nil {
c.UI.Error(fmt.Sprintf("No metadata found at %s; patch only works on existing data", path))
return 2
}
meta, ok := rawMeta.(map[string]interface{})
if !ok {
c.UI.Error(fmt.Sprintf("Metadata found at %s is not the expected type (JSON object)", path))
return 2
}
if meta == nil {
c.UI.Error(fmt.Sprintf("No metadata found at %s; patch only works on existing data", path))
return 2
}

// Verify old data found
rawData, ok := secret.Data["data"]
if !ok || rawData == nil {
c.UI.Error(fmt.Sprintf("No data found at %s; patch only works on existing data", path))
return 2
}
data, ok := rawData.(map[string]interface{})
if !ok {
c.UI.Error(fmt.Sprintf("Data found at %s is not the expected type (JSON object)", path))
return 2
}
if data == nil {
c.UI.Error(fmt.Sprintf("No data found at %s; patch only works on existing data", path))
return 2
}

// Copy new data over
for k, v := range newData {
data[k] = v
}

secret, err = client.Logical().Write(path, map[string]interface{}{
"data": data,
"options": map[string]interface{}{
"cas": meta["version"],
},
})
if err != nil {
c.UI.Error(fmt.Sprintf("Error writing data to %s: %s", path, err))
return 2
}
if secret == nil {
// Don't output anything unless using the "table" format
if Format(c.UI) == "table" {
c.UI.Info(fmt.Sprintf("Success! Data written to: %s", path))
}
return 0
}

if c.flagField != "" {
return PrintRawField(c.UI, secret, c.flagField)
}

return OutputSecret(c.UI, secret)
}