To properly enforce writes on resources that have workload selectors with prefixes, we need another service authorization rule that allows us to check whether read is allowed within a given prefix. Specifically we need to only allow writes if the policy prefix allows for a wider set of names than the prefix selector on the resource. We should also not allow policies with exact names for prefix matches.
Part of [NET-3993]
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There are a few changes that needed to be made to to handle authorizing
reads for imported data:
- If the data was imported from a peer we should not attempt to read the
data using the traditional authz rules. This is because the name of
services/nodes in a peer cluster are not equivalent to those of the
importing cluster.
- If the data was imported from a peer we need to check whether the
token corresponds to a service, meaning that it has service:write
permissions, or to a local read only token that can read all
nodes/services in a namespace.
This required changes at the policyAuthorizer level, since that is the
only view available to OSS Consul, and at the enterprise
partition/namespace level.
This commit adds a new ACL rule named "peering" to authorize
actions taken against peering-related endpoints.
The "peering" rule has several key properties:
- It is scoped to a partition, and MUST be defined in the default
namespace.
- Its access level must be "read', "write", or "deny".
- Granting an access level will apply to all peerings. This ACL rule
cannot be used to selective grant access to some peerings but not
others.
- If the peering rule is not specified, we fall back to the "operator"
rule and then the default ACL rule.
For many of the new RPCs that will be added in Consul servers for Agentless work,
the ACL token will need to be authorized for service:write on any service in any namespace in any partition.
The ACL package updates are to make ServiceWriteAny related helpers available on the different authorizers.
* Renamed structs.IntentionWildcard to structs.WildcardSpecifier
* Refactor ACL Config
Get rid of remnants of enterprise only renaming.
Add a WildcardName field for specifying what string should be used to indicate a wildcard.
* Add wildcard support in the ACL package
For read operations they can call anyAllowed to determine if any read access to the given resource would be granted.
For write operations they can call allAllowed to ensure that write access is granted to everything.
* Make v1/agent/connect/authorize namespace aware
* Update intention ACL enforcement
This also changes how intention:read is granted. Before the Intention.List RPC would allow viewing an intention if the token had intention:read on the destination. However Intention.Match allowed viewing if access was allowed for either the source or dest side. Now Intention.List and Intention.Get fall in line with Intention.Matches previous behavior.
Due to this being done a few different places ACL enforcement for a singular intention is now done with the CanRead and CanWrite methods on the intention itself.
* Refactor Intention.Apply to make things easier to follow.
* ACL Authorizer overhaul
To account for upcoming features every Authorization function can now take an extra *acl.EnterpriseAuthorizerContext. These are unused in OSS and will always be nil.
Additionally the acl package has received some thorough refactoring to enable all of the extra Consul Enterprise specific authorizations including moving sentinel enforcement into the stubbed structs. The Authorizer funcs now return an acl.EnforcementDecision instead of a boolean. This improves the overall interface as it makes multiple Authorizers easily chainable as they now indicate whether they had an authoritative decision or should use some other defaults. A ChainedAuthorizer was added to handle this Authorizer enforcement chain and will never itself return a non-authoritative decision.
* Include stub for extra enterprise rules in the global management policy
* Allow for an upgrade of the global-management policy
Iryna Shustava
Chris S. Kim
hashicorp-copywrite[bot]
Ronald
Freddy
Riddhi Shah
R.B. Boyer
Daniel Nephin
Matt Keeler
Matt Keeler