[Backport] Add kerberos grant_type to get token in exchange for Kerberos ticket … #43355
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…lastic#42847) Kibana wants to create access_token/refresh_token pair using Token management APIs in exchange for kerberos tickets. `client_credentials` grant_type requires every user to have `cluster:admin/xpack/security/token/create` cluster privilege. This commit introduces `_kerberos` grant_type for generating `access_token` and `refresh_token` in exchange for a valid base64 encoded kerberos ticket. In addition, `kibana_user` role now has cluster privilege to create tokens. This allows Kibana to create access_token/refresh_token pair in exchange for kerberos tickets. Note: The lifetime from the kerberos ticket is not used in ES and so even after it expires the access_token/refresh_token pair will be valid. Care must be taken to invalidate such tokens using token management APIs if required. Closes elastic#41943
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…(#42847)
Kibana wants to create access_token/refresh_token pair using Token
management APIs in exchange for kerberos tickets.
client_credentialsgrant_type requires every user to have
cluster:admin/xpack/security/token/createcluster privilege.
This commit introduces
_kerberosgrant_type for generatingaccess_tokenand
refresh_tokenin exchange for a valid base64 encoded kerberos ticket.In addition,
kibana_userrole now has cluster privilege to create tokens.This allows Kibana to create access_token/refresh_token pair in exchange for
kerberos tickets.
Note:
The lifetime from the kerberos ticket is not used in ES and so even after it expires
the access_token/refresh_token pair will be valid. Care must be taken to invalidate
such tokens using token management APIs if required.
Closes #41943