/
path_role_create.go
223 lines (196 loc) · 5.99 KB
/
path_role_create.go
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package rabbitmq
import (
"context"
"fmt"
"io/ioutil"
"github.com/hashicorp/vault/sdk/framework"
"github.com/hashicorp/vault/sdk/helper/template"
"github.com/hashicorp/vault/sdk/logical"
rabbithole "github.com/michaelklishin/rabbit-hole/v2"
)
const (
defaultUserNameTemplate = `{{ printf "%s-%s" (.DisplayName) (uuid) }}`
)
func pathCreds(b *backend) *framework.Path {
return &framework.Path{
Pattern: "creds/" + framework.GenericNameRegex("name"),
Fields: map[string]*framework.FieldSchema{
"name": {
Type: framework.TypeString,
Description: "Name of the role.",
},
},
Callbacks: map[logical.Operation]framework.OperationFunc{
logical.ReadOperation: b.pathCredsRead,
},
HelpSynopsis: pathRoleCreateReadHelpSyn,
HelpDescription: pathRoleCreateReadHelpDesc,
}
}
// Issues the credential based on the role name
func (b *backend) pathCredsRead(ctx context.Context, req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
name := d.Get("name").(string)
if name == "" {
return logical.ErrorResponse("missing name"), nil
}
// Get the role
role, err := b.Role(ctx, req.Storage, name)
if err != nil {
return nil, err
}
if role == nil {
return logical.ErrorResponse(fmt.Sprintf("unknown role: %s", name)), nil
}
config, err := readConfig(ctx, req.Storage)
if err != nil {
return nil, fmt.Errorf("unable to read configuration: %w", err)
}
usernameTemplate := config.UsernameTemplate
if usernameTemplate == "" {
usernameTemplate = defaultUserNameTemplate
}
up, err := template.NewTemplate(template.Template(usernameTemplate))
if err != nil {
return nil, fmt.Errorf("unable to initialize username template: %w", err)
}
um := UsernameMetadata{
DisplayName: req.DisplayName,
RoleName: name,
}
username, err := up.Generate(um)
if err != nil {
return nil, fmt.Errorf("failed to generate username: %w", err)
}
password, err := b.generatePassword(ctx, config.PasswordPolicy)
if err != nil {
return nil, err
}
// Get the client configuration
client, err := b.Client(ctx, req.Storage)
if err != nil {
return nil, err
}
if client == nil {
return logical.ErrorResponse("failed to get the client"), nil
}
// Register the generated credentials in the backend, with the RabbitMQ server
resp, err := client.PutUser(username, rabbithole.UserSettings{
Password: password,
Tags: []string{role.Tags},
})
if err != nil {
return nil, fmt.Errorf("failed to create a new user with the generated credentials")
}
defer func() {
if err := resp.Body.Close(); err != nil {
b.Logger().Error(fmt.Sprintf("unable to close response body: %s", err))
}
}()
if !isIn200s(resp.StatusCode) {
body, _ := ioutil.ReadAll(resp.Body)
return nil, fmt.Errorf("error creating user %s - %d: %s", username, resp.StatusCode, body)
}
success := false
defer func() {
if success {
return
}
// Delete the user because it's in an unknown state.
resp, err := client.DeleteUser(username)
if err != nil {
b.Logger().Error(fmt.Sprintf("deleting %s due to permissions being in an unknown state, but failed: %s", username, err))
}
if !isIn200s(resp.StatusCode) {
body, _ := ioutil.ReadAll(resp.Body)
b.Logger().Error(fmt.Sprintf("deleting %s due to permissions being in an unknown state, but error deleting: %d: %s", username, resp.StatusCode, body))
}
}()
// If the role had vhost permissions specified, assign those permissions
// to the created username for respective vhosts.
for vhost, permission := range role.VHosts {
if err := func() error {
resp, err := client.UpdatePermissionsIn(vhost, username, rabbithole.Permissions{
Configure: permission.Configure,
Write: permission.Write,
Read: permission.Read,
})
if err != nil {
return err
}
defer func() {
if err := resp.Body.Close(); err != nil {
b.Logger().Error(fmt.Sprintf("unable to close response body: %s", err))
}
}()
if !isIn200s(resp.StatusCode) {
body, _ := ioutil.ReadAll(resp.Body)
return fmt.Errorf("error updating vhost permissions for %s - %d: %s", vhost, resp.StatusCode, body)
}
return nil
}(); err != nil {
return nil, err
}
}
// If the role had vhost topic permissions specified, assign those permissions
// to the created username for respective vhosts and exchange.
for vhost, permissions := range role.VHostTopics {
for exchange, permission := range permissions {
if err := func() error {
resp, err := client.UpdateTopicPermissionsIn(vhost, username, rabbithole.TopicPermissions{
Exchange: exchange,
Write: permission.Write,
Read: permission.Read,
})
if err != nil {
return err
}
defer func() {
if err := resp.Body.Close(); err != nil {
b.Logger().Error(fmt.Sprintf("unable to close response body: %s", err))
}
}()
if !isIn200s(resp.StatusCode) {
body, _ := ioutil.ReadAll(resp.Body)
return fmt.Errorf("error updating vhost permissions for %s - %d: %s", vhost, resp.StatusCode, body)
}
return nil
}(); err != nil {
return nil, err
}
}
}
success = true
// Return the secret
response := b.Secret(SecretCredsType).Response(map[string]interface{}{
"username": username,
"password": password,
}, map[string]interface{}{
"username": username,
})
// Determine if we have a lease
lease, err := b.Lease(ctx, req.Storage)
if err != nil {
return nil, err
}
if lease != nil {
response.Secret.TTL = lease.TTL
response.Secret.MaxTTL = lease.MaxTTL
}
return response, nil
}
func isIn200s(respStatus int) bool {
return respStatus >= 200 && respStatus < 300
}
// UsernameMetadata is metadata the database plugin can use to generate a username
type UsernameMetadata struct {
DisplayName string
RoleName string
}
const pathRoleCreateReadHelpSyn = `
Request RabbitMQ credentials for a certain role.
`
const pathRoleCreateReadHelpDesc = `
This path reads RabbitMQ credentials for a certain role. The
RabbitMQ credentials will be generated on demand and will be automatically
revoked when the lease is up.
`