build(deps): bump github.com/open-policy-agent/opa from 0.57.1-0.20231016205909-98031ac004be to 0.57.1

[dependabot]

Bumps github.com/open-policy-agent/opa from 0.57.1-0.20231016205909-98031ac004be to 0.57.1.

Release notes

Sourced from github.com/open-policy-agent/opa's releases.

v0.57.1

This is a bug fix release addressing the following security issues:

Golang security fix GO-2023-2102

A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption.

OpenTelemetry-Go Contrib security fix CVE-2023-45142

Denial of service in otelhttp due to unbound cardinality metrics.

Changelog

Sourced from github.com/open-policy-agent/opa's changelog.

0.57.1

This is a bug fix release addressing the following security issues:

Golang security fix GO-2023-2102

A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption.

OpenTelemetry-Go Contrib security fix CVE-2023-45142

Denial of service in otelhttp due to unbound cardinality metrics.

0.57.0

This release contains an updated Rego syntax to allow general references in rule heads, and a mix of new features and bugfixes.

Support for General References in Rule Heads

In OPA 0.56.0, we introduced support for general references in rule heads as an experimental feature. It has now graduated to a fully supported feature, and is no longer experimental.

A general reference is a reference with variables at arbitrary locations. In Rego, partial rules are used for generating sets and objects. In previous versions of OPA, variables were only allowed in the very last position in the rule's reference. Now, Rego has been expanded to allow rules to be declared with general references in their head, with variables at arbitrary locations. This allows for generating nested dynamic object structures:

package example
import future.keywords
Converting a flat list of users to a mapping by "role" and then "id".
users_by_role[role][id] := user if {
some user in data.users
id := user.id
role := user.role
}
Explicit "admin" key override to the above mapping.
users_by_role.admin[id] := user if {
some user in data.admins
id := user.id
}
Leaf entries can be multi-value.
users_by_country[country] contains user.id if {
some user in data.users
country := user.country
}
</tr></table>

... (truncated)

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[szuecs]

@dependabot rebase

[dependabot]

Looks like this PR is already up-to-date with master! If you'd still like to recreate it from scratch, overwriting any edits, you can request @dependabot recreate.

[dependabot]

Looks like github.com/open-policy-agent/opa is up-to-date now, so this is no longer needed.