97 lines
3.0 KiB
Go
97 lines
3.0 KiB
Go
package aws
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import (
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"fmt"
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"sync/atomic"
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"time"
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"github.com/hashicorp/vault/logical"
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"github.com/hashicorp/vault/logical/framework"
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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(s logical.Storage, safety_buffer int) error {
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grabbed := atomic.CompareAndSwapUint32(&b.tidyWhitelistCASGuard, 0, 1)
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if grabbed {
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defer atomic.StoreUint32(&b.tidyWhitelistCASGuard, 0)
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} else {
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return fmt.Errorf("identity whitelist tidy operation already running")
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}
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bufferDuration := time.Duration(safety_buffer) * time.Second
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identities, err := s.List("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("whitelist/identity/" + instanceID)
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if err != nil {
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return fmt.Errorf("error fetching identity of instanceID %s: %s", instanceID, err)
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}
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if identityEntry == nil {
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return fmt.Errorf("identity entry for instanceID %s 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 %s 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().UTC().After(result.ExpirationTime.Add(bufferDuration)) {
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if err := s.Delete("whitelist/identity" + instanceID); err != nil {
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return fmt.Errorf("error deleting identity of instanceID %s from storage: %s", 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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// pathTidyIdentityWhitelistUpdate is used to delete entries in the whitelist that are expired.
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func (b *backend) pathTidyIdentityWhitelistUpdate(
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req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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return nil, b.tidyWhitelistIdentity(req.Storage, 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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