0e6da5c7ef
* Lower the interval for rotation during tests, to make it more likely that our five second grace period is sufficient. * Rewrite to make the rotateCredentials ticker a configurable value. * 'go mod vendor' for SDK changes.
665 lines
21 KiB
Go
665 lines
21 KiB
Go
package database
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import (
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"context"
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"fmt"
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"strings"
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"time"
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"github.com/hashicorp/vault/sdk/database/dbplugin"
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"github.com/hashicorp/vault/sdk/framework"
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"github.com/hashicorp/vault/sdk/helper/locksutil"
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"github.com/hashicorp/vault/sdk/helper/strutil"
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"github.com/hashicorp/vault/sdk/logical"
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"github.com/hashicorp/vault/sdk/queue"
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)
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func pathListRoles(b *databaseBackend) []*framework.Path {
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return []*framework.Path{
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&framework.Path{
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Pattern: "roles/?$",
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ListOperation: b.pathRoleList,
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},
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HelpSynopsis: pathRoleHelpSyn,
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HelpDescription: pathRoleHelpDesc,
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},
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&framework.Path{
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Pattern: "static-roles/?$",
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ListOperation: b.pathRoleList,
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},
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HelpSynopsis: pathStaticRoleHelpSyn,
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HelpDescription: pathStaticRoleHelpDesc,
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},
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}
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}
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func pathRoles(b *databaseBackend) []*framework.Path {
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return []*framework.Path{
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&framework.Path{
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Pattern: "roles/" + framework.GenericNameRegex("name"),
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Fields: fieldsForType(databaseRolePath),
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ExistenceCheck: b.pathRoleExistenceCheck,
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathRoleRead,
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logical.CreateOperation: b.pathRoleCreateUpdate,
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logical.UpdateOperation: b.pathRoleCreateUpdate,
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logical.DeleteOperation: b.pathRoleDelete,
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},
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HelpSynopsis: pathRoleHelpSyn,
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HelpDescription: pathRoleHelpDesc,
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},
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&framework.Path{
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Pattern: "static-roles/" + framework.GenericNameRegex("name"),
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Fields: fieldsForType(databaseStaticRolePath),
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ExistenceCheck: b.pathStaticRoleExistenceCheck,
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathStaticRoleRead,
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logical.CreateOperation: b.pathStaticRoleCreateUpdate,
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logical.UpdateOperation: b.pathStaticRoleCreateUpdate,
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logical.DeleteOperation: b.pathStaticRoleDelete,
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},
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HelpSynopsis: pathStaticRoleHelpSyn,
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HelpDescription: pathStaticRoleHelpDesc,
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},
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}
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}
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// fieldsForType returns a map of string/FieldSchema items for the given role
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// type. The purpose is to keep the shared fields between dynamic and static
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// roles consistent, and allow for each type to override or provide their own
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// specific fields
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func fieldsForType(roleType string) map[string]*framework.FieldSchema {
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fields := map[string]*framework.FieldSchema{
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"name": {
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Type: framework.TypeString,
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Description: "Name of the role.",
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},
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"db_name": {
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Type: framework.TypeString,
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Description: "Name of the database this role acts on.",
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},
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}
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// Get the fields that are specific to the type of role, and add them to the
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// common fields
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var typeFields map[string]*framework.FieldSchema
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switch roleType {
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case databaseStaticRolePath:
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typeFields = staticFields()
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default:
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typeFields = dynamicFields()
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}
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for k, v := range typeFields {
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fields[k] = v
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}
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return fields
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}
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// dynamicFields returns a map of key and field schema items that are specific
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// only to dynamic roles
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func dynamicFields() map[string]*framework.FieldSchema {
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fields := map[string]*framework.FieldSchema{
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"default_ttl": {
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Type: framework.TypeDurationSecond,
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Description: "Default ttl for role.",
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},
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"max_ttl": {
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Type: framework.TypeDurationSecond,
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Description: "Maximum time a credential is valid for",
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},
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"creation_statements": {
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Type: framework.TypeStringSlice,
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Description: `Specifies the database statements executed to
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create and configure a user. See the plugin's API page for more
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information on support and formatting for this parameter.`,
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},
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"revocation_statements": {
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Type: framework.TypeStringSlice,
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Description: `Specifies the database statements to be executed
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to revoke a user. See the plugin's API page for more information
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on support and formatting for this parameter.`,
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},
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"renew_statements": {
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Type: framework.TypeStringSlice,
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Description: `Specifies the database statements to be executed
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to renew a user. Not every plugin type will support this
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functionality. See the plugin's API page for more information on
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support and formatting for this parameter. `,
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},
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"rollback_statements": {
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Type: framework.TypeStringSlice,
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Description: `Specifies the database statements to be executed
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rollback a create operation in the event of an error. Not every plugin
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type will support this functionality. See the plugin's API page for
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more information on support and formatting for this parameter.`,
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},
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}
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return fields
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}
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// staticFields returns a map of key and field schema items that are specific
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// only to static roles
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func staticFields() map[string]*framework.FieldSchema {
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fields := map[string]*framework.FieldSchema{
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"username": {
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Type: framework.TypeString,
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Description: `Name of the static user account for Vault to manage.
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Requires "rotation_period" to be specified`,
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},
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"rotation_period": {
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Type: framework.TypeDurationSecond,
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Description: `Period for automatic
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credential rotation of the given username. Not valid unless used with
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"username".`,
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},
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"rotation_statements": {
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Type: framework.TypeStringSlice,
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Description: `Specifies the database statements to be executed to
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rotate the accounts credentials. Not every plugin type will support
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this functionality. See the plugin's API page for more information on
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support and formatting for this parameter.`,
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},
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}
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return fields
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}
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func (b *databaseBackend) pathRoleExistenceCheck(ctx context.Context, req *logical.Request, data *framework.FieldData) (bool, error) {
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role, err := b.Role(ctx, req.Storage, data.Get("name").(string))
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if err != nil {
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return false, err
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}
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return role != nil, nil
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}
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func (b *databaseBackend) pathStaticRoleExistenceCheck(ctx context.Context, req *logical.Request, data *framework.FieldData) (bool, error) {
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role, err := b.StaticRole(ctx, req.Storage, data.Get("name").(string))
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if err != nil {
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return false, err
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}
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return role != nil, nil
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}
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func (b *databaseBackend) pathRoleDelete(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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err := req.Storage.Delete(ctx, databaseRolePath+data.Get("name").(string))
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if err != nil {
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return nil, err
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}
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return nil, nil
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}
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func (b *databaseBackend) pathStaticRoleDelete(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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name := data.Get("name").(string)
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// Grab the exclusive lock
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lock := locksutil.LockForKey(b.roleLocks, name)
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lock.Lock()
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defer lock.Unlock()
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// Remove the item from the queue
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_, _ = b.popFromRotationQueueByKey(name)
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err := req.Storage.Delete(ctx, databaseStaticRolePath+name)
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if err != nil {
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return nil, err
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}
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return nil, nil
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}
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func (b *databaseBackend) pathStaticRoleRead(ctx context.Context, req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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role, err := b.StaticRole(ctx, req.Storage, d.Get("name").(string))
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if err != nil {
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return nil, err
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}
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if role == nil {
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return nil, nil
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}
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data := map[string]interface{}{
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"db_name": role.DBName,
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"rotation_statements": role.Statements.Rotation,
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}
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// guard against nil StaticAccount; shouldn't happen but we'll be safe
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if role.StaticAccount != nil {
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data["username"] = role.StaticAccount.Username
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data["rotation_statements"] = role.Statements.Rotation
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data["rotation_period"] = role.StaticAccount.RotationPeriod.Seconds()
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if !role.StaticAccount.LastVaultRotation.IsZero() {
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data["last_vault_rotation"] = role.StaticAccount.LastVaultRotation
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}
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}
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if len(role.Statements.Rotation) == 0 {
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data["rotation_statements"] = []string{}
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}
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return &logical.Response{
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Data: data,
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}, nil
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}
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func (b *databaseBackend) pathRoleRead(ctx context.Context, req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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role, err := b.Role(ctx, req.Storage, d.Get("name").(string))
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if err != nil {
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return nil, err
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}
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if role == nil {
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return nil, nil
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}
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data := map[string]interface{}{
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"db_name": role.DBName,
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"creation_statements": role.Statements.Creation,
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"revocation_statements": role.Statements.Revocation,
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"rollback_statements": role.Statements.Rollback,
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"renew_statements": role.Statements.Renewal,
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"default_ttl": role.DefaultTTL.Seconds(),
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"max_ttl": role.MaxTTL.Seconds(),
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}
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if len(role.Statements.Creation) == 0 {
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data["creation_statements"] = []string{}
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}
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if len(role.Statements.Revocation) == 0 {
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data["revocation_statements"] = []string{}
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}
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if len(role.Statements.Rollback) == 0 {
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data["rollback_statements"] = []string{}
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}
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if len(role.Statements.Renewal) == 0 {
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data["renew_statements"] = []string{}
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}
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return &logical.Response{
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Data: data,
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}, nil
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}
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func (b *databaseBackend) pathRoleList(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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path := databaseRolePath
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if strings.HasPrefix(req.Path, "static-roles") {
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path = databaseStaticRolePath
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}
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entries, err := req.Storage.List(ctx, path)
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if err != nil {
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return nil, err
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}
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return logical.ListResponse(entries), nil
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}
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func (b *databaseBackend) pathRoleCreateUpdate(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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name := data.Get("name").(string)
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if name == "" {
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return logical.ErrorResponse("empty role name attribute given"), nil
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}
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exists, err := b.pathStaticRoleExistenceCheck(ctx, req, data)
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if err != nil {
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return nil, err
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}
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if exists {
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return logical.ErrorResponse("Role and Static Role names must be unique"), nil
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}
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role, err := b.Role(ctx, req.Storage, name)
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if err != nil {
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return nil, err
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}
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if role == nil {
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role = &roleEntry{}
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}
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createOperation := (req.Operation == logical.CreateOperation)
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// DB Attributes
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{
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if dbNameRaw, ok := data.GetOk("db_name"); ok {
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role.DBName = dbNameRaw.(string)
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} else if createOperation {
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role.DBName = data.Get("db_name").(string)
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}
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if role.DBName == "" {
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return logical.ErrorResponse("database name is required"), nil
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}
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}
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// Statements
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{
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if creationStmtsRaw, ok := data.GetOk("creation_statements"); ok {
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role.Statements.Creation = creationStmtsRaw.([]string)
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} else if createOperation {
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role.Statements.Creation = data.Get("creation_statements").([]string)
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}
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if revocationStmtsRaw, ok := data.GetOk("revocation_statements"); ok {
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role.Statements.Revocation = revocationStmtsRaw.([]string)
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} else if createOperation {
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role.Statements.Revocation = data.Get("revocation_statements").([]string)
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}
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if rollbackStmtsRaw, ok := data.GetOk("rollback_statements"); ok {
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role.Statements.Rollback = rollbackStmtsRaw.([]string)
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} else if createOperation {
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role.Statements.Rollback = data.Get("rollback_statements").([]string)
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}
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if renewStmtsRaw, ok := data.GetOk("renew_statements"); ok {
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role.Statements.Renewal = renewStmtsRaw.([]string)
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} else if createOperation {
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role.Statements.Renewal = data.Get("renew_statements").([]string)
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}
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// Do not persist deprecated statements that are populated on role read
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role.Statements.CreationStatements = ""
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role.Statements.RevocationStatements = ""
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role.Statements.RenewStatements = ""
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role.Statements.RollbackStatements = ""
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}
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role.Statements.Revocation = strutil.RemoveEmpty(role.Statements.Revocation)
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// TTLs
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{
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if defaultTTLRaw, ok := data.GetOk("default_ttl"); ok {
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role.DefaultTTL = time.Duration(defaultTTLRaw.(int)) * time.Second
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} else if createOperation {
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role.DefaultTTL = time.Duration(data.Get("default_ttl").(int)) * time.Second
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}
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if maxTTLRaw, ok := data.GetOk("max_ttl"); ok {
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role.MaxTTL = time.Duration(maxTTLRaw.(int)) * time.Second
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} else if createOperation {
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role.MaxTTL = time.Duration(data.Get("max_ttl").(int)) * time.Second
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}
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}
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// Store it
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entry, err := logical.StorageEntryJSON(databaseRolePath+name, role)
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if err != nil {
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return nil, err
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}
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if err := req.Storage.Put(ctx, entry); err != nil {
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return nil, err
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}
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return nil, nil
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}
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func (b *databaseBackend) pathStaticRoleCreateUpdate(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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name := data.Get("name").(string)
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if name == "" {
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return logical.ErrorResponse("empty role name attribute given"), nil
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}
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// Grab the exclusive lock as well potentially pop and re-push the queue item
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// for this role
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lock := locksutil.LockForKey(b.roleLocks, name)
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lock.Lock()
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defer lock.Unlock()
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exists, err := b.pathRoleExistenceCheck(ctx, req, data)
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if err != nil {
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return nil, err
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}
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if exists {
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return logical.ErrorResponse("Role and Static Role names must be unique"), nil
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}
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role, err := b.StaticRole(ctx, req.Storage, data.Get("name").(string))
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if err != nil {
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return nil, err
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}
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// createRole is a boolean to indicate if this is a new role creation. This is
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// can be used later by database plugins that distinguish between creating and
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// updating roles, and may use seperate statements depending on the context.
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createRole := (req.Operation == logical.CreateOperation)
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if role == nil {
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role = &roleEntry{
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StaticAccount: &staticAccount{},
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}
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createRole = true
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}
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// DB Attributes
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if dbNameRaw, ok := data.GetOk("db_name"); ok {
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role.DBName = dbNameRaw.(string)
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} else if createRole {
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role.DBName = data.Get("db_name").(string)
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}
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if role.DBName == "" {
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return logical.ErrorResponse("database name is a required field"), nil
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}
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username := data.Get("username").(string)
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if username == "" && createRole {
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return logical.ErrorResponse("username is a required field to create a static account"), nil
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}
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if role.StaticAccount.Username != "" && role.StaticAccount.Username != username {
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return logical.ErrorResponse("cannot update static account username"), nil
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}
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role.StaticAccount.Username = username
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// If it's a Create operation, both username and rotation_period must be included
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rotationPeriodSecondsRaw, ok := data.GetOk("rotation_period")
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if !ok && createRole {
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return logical.ErrorResponse("rotation_period is required to create static accounts"), nil
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}
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if ok {
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rotationPeriodSeconds := rotationPeriodSecondsRaw.(int)
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if rotationPeriodSeconds < defaultQueueTickSeconds {
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// If rotation frequency is specified, and this is an update, the value
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// must be at least that of the queue tick interval (5 seconds at
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// time of writing), otherwise we wont be able to rotate in time
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return logical.ErrorResponse(fmt.Sprintf("rotation_period must be %d seconds or more", defaultQueueTickSeconds)), nil
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}
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role.StaticAccount.RotationPeriod = time.Duration(rotationPeriodSeconds) * time.Second
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}
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if rotationStmtsRaw, ok := data.GetOk("rotation_statements"); ok {
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role.Statements.Rotation = rotationStmtsRaw.([]string)
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} else if req.Operation == logical.CreateOperation {
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role.Statements.Rotation = data.Get("rotation_statements").([]string)
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}
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// lvr represents the roles' LastVaultRotation
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lvr := role.StaticAccount.LastVaultRotation
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// Only call setStaticAccount if we're creating the role for the
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// first time
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switch req.Operation {
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case logical.CreateOperation:
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// setStaticAccount calls Storage.Put and saves the role to storage
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resp, err := b.setStaticAccount(ctx, req.Storage, &setStaticAccountInput{
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RoleName: name,
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Role: role,
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CreateUser: createRole,
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})
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if err != nil {
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return nil, err
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}
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// guard against RotationTime not being set or zero-value
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lvr = resp.RotationTime
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case logical.UpdateOperation:
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// store updated Role
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entry, err := logical.StorageEntryJSON(databaseStaticRolePath+name, role)
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if err != nil {
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return nil, err
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}
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if err := req.Storage.Put(ctx, entry); err != nil {
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return nil, err
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}
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// In case this is an update, remove any previous version of the item from
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// the queue
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b.popFromRotationQueueByKey(name)
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}
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// Add their rotation to the queue
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if err := b.pushItem(&queue.Item{
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Key: name,
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Priority: lvr.Add(role.StaticAccount.RotationPeriod).Unix(),
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}); err != nil {
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return nil, err
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}
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return nil, nil
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}
|
|
|
|
type roleEntry struct {
|
|
DBName string `json:"db_name"`
|
|
Statements dbplugin.Statements `json:"statements"`
|
|
DefaultTTL time.Duration `json:"default_ttl"`
|
|
MaxTTL time.Duration `json:"max_ttl"`
|
|
StaticAccount *staticAccount `json:"static_account" mapstructure:"static_account"`
|
|
}
|
|
|
|
type staticAccount struct {
|
|
// Username to create or assume management for static accounts
|
|
Username string `json:"username"`
|
|
|
|
// Password is the current password for static accounts. As an input, this is
|
|
// used/required when trying to assume management of an existing static
|
|
// account. Return this on credential request if it exists.
|
|
Password string `json:"password"`
|
|
|
|
// LastVaultRotation represents the last time Vault rotated the password
|
|
LastVaultRotation time.Time `json:"last_vault_rotation"`
|
|
|
|
// RotationPeriod is number in seconds between each rotation, effectively a
|
|
// "time to live". This value is compared to the LastVaultRotation to
|
|
// determine if a password needs to be rotated
|
|
RotationPeriod time.Duration `json:"rotation_period"`
|
|
|
|
// RevokeUser is a boolean flag to indicate if Vault should revoke the
|
|
// database user when the role is deleted
|
|
RevokeUserOnDelete bool `json:"revoke_user_on_delete"`
|
|
}
|
|
|
|
// NextRotationTime calculates the next rotation by adding the Rotation Period
|
|
// to the last known vault rotation
|
|
func (s *staticAccount) NextRotationTime() time.Time {
|
|
return s.LastVaultRotation.Add(s.RotationPeriod)
|
|
}
|
|
|
|
// PasswordTTL calculates the approximate time remaining until the password is
|
|
// no longer valid. This is approximate because the periodic rotation is only
|
|
// checked approximately every 5 seconds, and each rotation can take a small
|
|
// amount of time to process. This can result in a negative TTL time while the
|
|
// rotation function processes the Static Role and performs the rotation. If the
|
|
// TTL is negative, zero is returned. Users should not trust passwords with a
|
|
// Zero TTL, as they are likely in the process of being rotated and will quickly
|
|
// be invalidated.
|
|
func (s *staticAccount) PasswordTTL() time.Duration {
|
|
next := s.NextRotationTime()
|
|
ttl := next.Sub(time.Now()).Round(time.Second)
|
|
if ttl < 0 {
|
|
ttl = time.Duration(0)
|
|
}
|
|
return ttl
|
|
}
|
|
|
|
const pathRoleHelpSyn = `
|
|
Manage the roles that can be created with this backend.
|
|
`
|
|
|
|
const pathStaticRoleHelpSyn = `
|
|
Manage the static roles that can be created with this backend.
|
|
`
|
|
|
|
const pathRoleHelpDesc = `
|
|
This path lets you manage the roles that can be created with this backend.
|
|
|
|
The "db_name" parameter is required and configures the name of the database
|
|
connection to use.
|
|
|
|
The "creation_statements" parameter customizes the string used to create the
|
|
credentials. This can be a sequence of SQL queries, or other statement formats
|
|
for a particular database type. Some substitution will be done to the statement
|
|
strings for certain keys. The names of the variables must be surrounded by "{{"
|
|
and "}}" to be replaced.
|
|
|
|
* "name" - The random username generated for the DB user.
|
|
|
|
* "password" - The random password generated for the DB user.
|
|
|
|
* "expiration" - The timestamp when this user will expire.
|
|
|
|
Example of a decent creation_statements for a postgresql database plugin:
|
|
|
|
CREATE ROLE "{{name}}" WITH
|
|
LOGIN
|
|
PASSWORD '{{password}}'
|
|
VALID UNTIL '{{expiration}}';
|
|
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO "{{name}}";
|
|
|
|
The "revocation_statements" parameter customizes the statement string used to
|
|
revoke a user. Example of a decent revocation_statements for a postgresql
|
|
database plugin:
|
|
|
|
REVOKE ALL PRIVILEGES ON ALL TABLES IN SCHEMA public FROM {{name}};
|
|
REVOKE ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public FROM {{name}};
|
|
REVOKE USAGE ON SCHEMA public FROM {{name}};
|
|
DROP ROLE IF EXISTS {{name}};
|
|
|
|
The "renew_statements" parameter customizes the statement string used to renew a
|
|
user.
|
|
The "rollback_statements' parameter customizes the statement string used to
|
|
rollback a change if needed.
|
|
`
|
|
|
|
const pathStaticRoleHelpDesc = `
|
|
This path lets you manage the static roles that can be created with this
|
|
backend. Static Roles are associated with a single database user, and manage the
|
|
password based on a rotation period, automatically rotating the password.
|
|
|
|
The "db_name" parameter is required and configures the name of the database
|
|
connection to use.
|
|
|
|
The "creation_statements" parameter customizes the string used to create the
|
|
credentials. This can be a sequence of SQL queries, or other statement formats
|
|
for a particular database type. Some substitution will be done to the statement
|
|
strings for certain keys. The names of the variables must be surrounded by "{{"
|
|
and "}}" to be replaced.
|
|
|
|
* "name" - The random username generated for the DB user.
|
|
|
|
* "password" - The random password generated for the DB user.
|
|
|
|
Example of a decent creation_statements for a postgresql database plugin:
|
|
|
|
CREATE ROLE "{{name}}" WITH
|
|
LOGIN
|
|
PASSWORD '{{password}}'
|
|
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO "{{name}}";
|
|
|
|
The "revocation_statements" parameter customizes the statement string used to
|
|
revoke a user. Example of a decent revocation_statements for a postgresql
|
|
database plugin:
|
|
|
|
REVOKE ALL PRIVILEGES ON ALL TABLES IN SCHEMA public FROM {{name}};
|
|
REVOKE ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public FROM {{name}};
|
|
REVOKE USAGE ON SCHEMA public FROM {{name}};
|
|
DROP ROLE IF EXISTS {{name}};
|
|
|
|
The "renew_statements" parameter customizes the statement string used to renew a
|
|
user.
|
|
The "rollback_statements' parameter customizes the statement string used to
|
|
rollback a change if needed.
|
|
`
|