如何通过Accessor读取Hashicorp Vault的Token值？

Great question! Let's cut to the chase first:

No, you cannot retrieve the actual, usable token string using the vault token lookup --accessor <accessor-value> command.

Here's why this is the case, tied directly to Vault's security design:

• Vault intentionally separates token values from their accessors. The accessor is a non-sensitive identifier meant for managing tokens without exposing the actual token itself. It lets you perform actions like revoking a token or checking its metadata (policies, TTL, creation details) without needing to handle the sensitive token string.
• When you run the lookup command with an accessor, the response will include all metadata about the token, but the actual token value (the id field in standard token lookups) will show as n/a or be omitted entirely. For example, a typical response might look like this:

  Key                 Value
  ---                 -----
  accessor            secret
  creation_time       1620000000
  creation_ttl        768h
  display_name        user
  entity_id           abc123
  expire_time         1623264000
  explicit_max_ttl    0s
  id                  n/a
  issue_time          2021-05-03T12:00:00Z
  meta                map[]
  num_uses            0
  orphan              false
  path                auth/user/login
  policies            [default user-policy]
  renewable           true
  ttl                 760h12m34s
  type                service
  

A quick important note: The only time you can get the actual token value is at the moment it's created—whether that's via vault token create, a login command (like vault login -method=userpass username=foo), or an auth method's API response. Once you've moved past that point, there's no way to recover the token value through Vault's tools. This is a deliberate security choice to prevent accidental exposure or unauthorized retrieval of active, usable tokens.

内容的提问来源于stack exchange，提问作者Lelum Polelum