/
retriever_remote.go
77 lines (63 loc) · 1.91 KB
/
retriever_remote.go
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package permissions
import (
"context"
"go.aporeto.io/a3s/pkgs/api"
"go.aporeto.io/manipulate"
)
type remoteRetriever struct {
manipulator manipulate.Manipulator
transformer Transformer
}
// NewRemoteRetriever returns a new Retriever backed by remote API calls to
// an A3S instance, using the /permissions api.
// This is meant to be used with an authorizer.Authorizer by A3S client
// wishing to verify permissions for their users.
func NewRemoteRetriever(manipulator manipulate.Manipulator) Retriever {
return &remoteRetriever{
manipulator: manipulator,
}
}
// NewRemoteRetrieverWithTransformer returns a new RemoteRetriever with the provided transformer.
func NewRemoteRetrieverWithTransformer(manipulator manipulate.Manipulator, transformer Transformer) Retriever {
return &remoteRetriever{
manipulator: manipulator,
transformer: transformer,
}
}
func (a *remoteRetriever) Permissions(ctx context.Context, claims []string, ns string, opts ...RetrieverOption) (PermissionMap, error) {
cfg := &config{}
for _, o := range opts {
o(cfg)
}
preq := api.NewPermissions()
preq.Claims = claims
preq.Namespace = ns
preq.ID = cfg.id
preq.IP = cfg.addr
preq.RestrictedNamespace = cfg.restrictions.Namespace
preq.RestrictedNetworks = cfg.restrictions.Networks
preq.RestrictedPermissions = cfg.restrictions.Permissions
preq.OffloadPermissionsRestrictions = a.transformer != nil
if err := a.manipulator.Create(manipulate.NewContext(ctx), preq); err != nil {
return nil, err
}
out := make(PermissionMap, len(preq.Permissions))
for ident, perms := range preq.Permissions {
out[ident] = perms
}
// Transform any roles into their identities and verbs
if a.transformer != nil {
out = a.transformer.Transform(out)
if len(cfg.restrictions.Permissions) > 0 {
out = out.Intersect(
a.transformer.Transform(
Parse(
cfg.restrictions.Permissions,
cfg.id,
),
),
)
}
}
return out, nil
}