126 lines
4 KiB
Go
126 lines
4 KiB
Go
package awsauth
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import (
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"context"
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"fmt"
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"net/http"
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"sync/atomic"
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"time"
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"github.com/hashicorp/errwrap"
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"github.com/hashicorp/vault/sdk/framework"
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"github.com/hashicorp/vault/sdk/helper/consts"
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"github.com/hashicorp/vault/sdk/logical"
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)
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func pathTidyIdentityWhitelist(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: "tidy/identity-whitelist$",
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Fields: map[string]*framework.FieldSchema{
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"safety_buffer": &framework.FieldSchema{
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Type: framework.TypeDurationSecond,
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Default: 259200,
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Description: `The amount of extra time that must have passed beyond the identity's
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expiration, before it is removed from the backend storage.`,
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},
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},
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.UpdateOperation: b.pathTidyIdentityWhitelistUpdate,
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},
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HelpSynopsis: pathTidyIdentityWhitelistSyn,
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HelpDescription: pathTidyIdentityWhitelistDesc,
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}
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}
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// tidyWhitelistIdentity is used to delete entries in the whitelist that are expired.
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func (b *backend) tidyWhitelistIdentity(ctx context.Context, req *logical.Request, safetyBuffer int) (*logical.Response, error) {
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// If we are a performance standby forward the request to the active node
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if b.System().ReplicationState().HasState(consts.ReplicationPerformanceStandby) {
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return nil, logical.ErrReadOnly
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}
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if !atomic.CompareAndSwapUint32(b.tidyWhitelistCASGuard, 0, 1) {
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resp := &logical.Response{}
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resp.AddWarning("Tidy operation already in progress.")
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return resp, nil
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}
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s := req.Storage
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go func() {
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defer atomic.StoreUint32(b.tidyWhitelistCASGuard, 0)
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// Don't cancel when the original client request goes away
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ctx = context.Background()
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logger := b.Logger().Named("wltidy")
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bufferDuration := time.Duration(safetyBuffer) * time.Second
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doTidy := func() error {
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identities, err := s.List(ctx, "whitelist/identity/")
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if err != nil {
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return err
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}
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for _, instanceID := range identities {
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identityEntry, err := s.Get(ctx, "whitelist/identity/"+instanceID)
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if err != nil {
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return errwrap.Wrapf(fmt.Sprintf("error fetching identity of instanceID %q: {{err}}", instanceID), err)
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}
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if identityEntry == nil {
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return fmt.Errorf("identity entry for instanceID %q is nil", instanceID)
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}
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if identityEntry.Value == nil || len(identityEntry.Value) == 0 {
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return fmt.Errorf("found identity entry for instanceID %q but actual identity is empty", instanceID)
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}
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var result whitelistIdentity
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if err := identityEntry.DecodeJSON(&result); err != nil {
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return err
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}
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if time.Now().After(result.ExpirationTime.Add(bufferDuration)) {
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if err := s.Delete(ctx, "whitelist/identity/"+instanceID); err != nil {
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return errwrap.Wrapf(fmt.Sprintf("error deleting identity of instanceID %q from storage: {{err}}", instanceID), err)
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}
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}
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}
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return nil
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}
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if err := doTidy(); err != nil {
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logger.Error("error running whitelist tidy", "error", err)
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return
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}
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}()
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resp := &logical.Response{}
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resp.AddWarning("Tidy operation successfully started. Any information from the operation will be printed to Vault's server logs.")
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return logical.RespondWithStatusCode(resp, req, http.StatusAccepted)
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}
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// pathTidyIdentityWhitelistUpdate is used to delete entries in the whitelist that are expired.
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func (b *backend) pathTidyIdentityWhitelistUpdate(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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return b.tidyWhitelistIdentity(ctx, req, data.Get("safety_buffer").(int))
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}
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const pathTidyIdentityWhitelistSyn = `
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Clean-up the whitelist instance identity entries.
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`
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const pathTidyIdentityWhitelistDesc = `
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When an instance identity is whitelisted, the expiration time of the whitelist
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entry is set based on the maximum 'max_ttl' value set on: the role, the role tag
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and the backend's mount.
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When this endpoint is invoked, all the entries that are expired will be deleted.
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A 'safety_buffer' (duration in seconds) can be provided, to ensure deletion of
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only those entries that are expired before 'safety_buffer' seconds.
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`
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