» Vault Enterprise Control Group Support

Vault Enterprise has support for Control Group Authorization. Control Groups add additional authorization factors to be required before satisfying a request.

When a Control Group is required for a request, a limited duration response wrapping token is returned to the user instead of the requested data. The accessor of the response wrapping token can be passed to the authorizers required by the control group policy. Once all authorizations are satisified, the wrapping token can be used to unwrap and process the original request.

» Control Group Factors

Control Groups can verify the following factors:

  • Identity Groups - Require an authorizer to be in a specific set of identity groups.

» Control Groups In ACL Policies

Control Group requirements on paths are specified as control_group along with other ACL parameters.

» Sample ACL Policies

path "secret/foo" {
    capabilities = ["read"]
    control_group = {
        factor "ops_manager" {
            identity {
                group_names = ["managers"]
                approvals = 1
            }
        }
    }
}

The above policy grants read access to secret/foo only after one member of the "managers" group authorizes the request.

path "secret/foo" {
    capabilities = ["create", "update"]
    control_group = {
        ttl = "4h"
        factor "tech leads" {
            identity {
                group_names = ["managers", "leads"]
                approvals = 2
            }
        }
        factor "super users" {
            identity {
                group_names = ["superusers"]
                approvals = 1
            }
        }
    }
}

The above policy grants create and update access to secret/foo only after two member of the "managers" or "leads" group and one member of the "superusers" group authorizes the request. If an authorizer is a member of both the "managers" and "superusers" group, one authorization for both factors will be satisfied.

» Control Groups in Sentinel

Control Groups are also supported in Sentinel policies using the controlgroup import. See Sentinel Documentation for more details on available properties.

» Sample Sentinel Policy

import "time"
import "controlgroup"

control_group = func() {
    numAuthzs = 0
    for controlgroup.authorizations as authz {
        if "managers" in authz.groups.by_name {
            if time.load(authz.time).unix > time.now.unix - 3600 {
                numAuthzs = numAuthzs + 1
            }
        }
    }
    if numAuthzs >= 2 {
        return true
    }
    return false
}

main = rule {
    control_group()
}

The above policy will reject the request unless two members of the managers group have authorized the request. Additionally it verifies the authorizations happened in the last hour.

» API

Control Groups can be managed over the HTTP API. Please see Control Groups API for more details.