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server.go
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// Copyright (c) Abstract Machines
// SPDX-License-Identifier: Apache-2.0
package grpc
import (
"context"
"github.com/absmach/magistrala"
"github.com/absmach/magistrala/auth"
"github.com/absmach/magistrala/internal/apiutil"
"github.com/absmach/magistrala/pkg/errors"
svcerr "github.com/absmach/magistrala/pkg/errors/service"
kitgrpc "github.com/go-kit/kit/transport/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
var _ magistrala.AuthServiceServer = (*grpcServer)(nil)
var (
defThingsFilterPermissions = []string{
auth.AdminPermission,
auth.DeletePermission,
auth.EditPermission,
auth.ViewPermission,
auth.SharePermission,
auth.PublishPermission,
auth.SubscribePermission,
}
defGroupsFilterPermissions = []string{
auth.AdminPermission,
auth.DeletePermission,
auth.EditPermission,
auth.ViewPermission,
auth.MembershipPermission,
auth.SharePermission,
}
defDomainsFilterPermissions = []string{
auth.AdminPermission,
auth.EditPermission,
auth.ViewPermission,
auth.MembershipPermission,
auth.SharePermission,
}
defPlatformFilterPermissions = []string{
auth.AdminPermission,
auth.MembershipPermission,
}
)
type grpcServer struct {
magistrala.UnimplementedAuthServiceServer
issue kitgrpc.Handler
refresh kitgrpc.Handler
identify kitgrpc.Handler
authorize kitgrpc.Handler
addPolicy kitgrpc.Handler
addPolicies kitgrpc.Handler
deletePolicy kitgrpc.Handler
deletePolicies kitgrpc.Handler
listObjects kitgrpc.Handler
listAllObjects kitgrpc.Handler
countObjects kitgrpc.Handler
listSubjects kitgrpc.Handler
listAllSubjects kitgrpc.Handler
countSubjects kitgrpc.Handler
listPermissions kitgrpc.Handler
}
// NewServer returns new AuthServiceServer instance.
func NewServer(svc auth.Service) magistrala.AuthServiceServer {
return &grpcServer{
issue: kitgrpc.NewServer(
(issueEndpoint(svc)),
decodeIssueRequest,
encodeIssueResponse,
),
refresh: kitgrpc.NewServer(
(refreshEndpoint(svc)),
decodeRefreshRequest,
encodeIssueResponse,
),
identify: kitgrpc.NewServer(
(identifyEndpoint(svc)),
decodeIdentifyRequest,
encodeIdentifyResponse,
),
authorize: kitgrpc.NewServer(
(authorizeEndpoint(svc)),
decodeAuthorizeRequest,
encodeAuthorizeResponse,
),
addPolicy: kitgrpc.NewServer(
(addPolicyEndpoint(svc)),
decodeAddPolicyRequest,
encodeAddPolicyResponse,
),
addPolicies: kitgrpc.NewServer(
(addPoliciesEndpoint(svc)),
decodeAddPoliciesRequest,
encodeAddPoliciesResponse,
),
deletePolicy: kitgrpc.NewServer(
(deletePolicyEndpoint(svc)),
decodeDeletePolicyRequest,
encodeDeletePolicyResponse,
),
deletePolicies: kitgrpc.NewServer(
(deletePoliciesEndpoint(svc)),
decodeDeletePoliciesRequest,
encodeDeletePoliciesResponse,
),
listObjects: kitgrpc.NewServer(
(listObjectsEndpoint(svc)),
decodeListObjectsRequest,
encodeListObjectsResponse,
),
listAllObjects: kitgrpc.NewServer(
(listAllObjectsEndpoint(svc)),
decodeListObjectsRequest,
encodeListObjectsResponse,
),
countObjects: kitgrpc.NewServer(
(countObjectsEndpoint(svc)),
decodeCountObjectsRequest,
encodeCountObjectsResponse,
),
listSubjects: kitgrpc.NewServer(
(listSubjectsEndpoint(svc)),
decodeListSubjectsRequest,
encodeListSubjectsResponse,
),
listAllSubjects: kitgrpc.NewServer(
(listAllSubjectsEndpoint(svc)),
decodeListSubjectsRequest,
encodeListSubjectsResponse,
),
countSubjects: kitgrpc.NewServer(
(countSubjectsEndpoint(svc)),
decodeCountSubjectsRequest,
encodeCountSubjectsResponse,
),
listPermissions: kitgrpc.NewServer(
(listPermissionsEndpoint(svc)),
decodeListPermissionsRequest,
encodeListPermissionsResponse,
),
}
}
func (s *grpcServer) Issue(ctx context.Context, req *magistrala.IssueReq) (*magistrala.Token, error) {
_, res, err := s.issue.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.Token), nil
}
func (s *grpcServer) Refresh(ctx context.Context, req *magistrala.RefreshReq) (*magistrala.Token, error) {
_, res, err := s.refresh.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.Token), nil
}
func (s *grpcServer) Identify(ctx context.Context, token *magistrala.IdentityReq) (*magistrala.IdentityRes, error) {
_, res, err := s.identify.ServeGRPC(ctx, token)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.IdentityRes), nil
}
func (s *grpcServer) Authorize(ctx context.Context, req *magistrala.AuthorizeReq) (*magistrala.AuthorizeRes, error) {
_, res, err := s.authorize.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.AuthorizeRes), nil
}
func (s *grpcServer) AddPolicy(ctx context.Context, req *magistrala.AddPolicyReq) (*magistrala.AddPolicyRes, error) {
_, res, err := s.addPolicy.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.AddPolicyRes), nil
}
func (s *grpcServer) AddPolicies(ctx context.Context, req *magistrala.AddPoliciesReq) (*magistrala.AddPoliciesRes, error) {
_, res, err := s.addPolicies.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.AddPoliciesRes), nil
}
func (s *grpcServer) DeletePolicy(ctx context.Context, req *magistrala.DeletePolicyReq) (*magistrala.DeletePolicyRes, error) {
_, res, err := s.deletePolicy.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.DeletePolicyRes), nil
}
func (s *grpcServer) DeletePolicies(ctx context.Context, req *magistrala.DeletePoliciesReq) (*magistrala.DeletePoliciesRes, error) {
_, res, err := s.deletePolicies.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.DeletePoliciesRes), nil
}
func (s *grpcServer) ListObjects(ctx context.Context, req *magistrala.ListObjectsReq) (*magistrala.ListObjectsRes, error) {
_, res, err := s.listObjects.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.ListObjectsRes), nil
}
func (s *grpcServer) ListAllObjects(ctx context.Context, req *magistrala.ListObjectsReq) (*magistrala.ListObjectsRes, error) {
_, res, err := s.listAllObjects.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.ListObjectsRes), nil
}
func (s *grpcServer) CountObjects(ctx context.Context, req *magistrala.CountObjectsReq) (*magistrala.CountObjectsRes, error) {
_, res, err := s.countObjects.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.CountObjectsRes), nil
}
func (s *grpcServer) ListSubjects(ctx context.Context, req *magistrala.ListSubjectsReq) (*magistrala.ListSubjectsRes, error) {
_, res, err := s.listSubjects.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.ListSubjectsRes), nil
}
func (s *grpcServer) ListAllSubjects(ctx context.Context, req *magistrala.ListSubjectsReq) (*magistrala.ListSubjectsRes, error) {
_, res, err := s.listAllSubjects.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.ListSubjectsRes), nil
}
func (s *grpcServer) CountSubjects(ctx context.Context, req *magistrala.CountSubjectsReq) (*magistrala.CountSubjectsRes, error) {
_, res, err := s.countSubjects.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.CountSubjectsRes), nil
}
func (s *grpcServer) ListPermissions(ctx context.Context, req *magistrala.ListPermissionsReq) (*magistrala.ListPermissionsRes, error) {
_, res, err := s.listPermissions.ServeGRPC(ctx, req)
if err != nil {
return nil, encodeError(err)
}
return res.(*magistrala.ListPermissionsRes), nil
}
func decodeIssueRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.IssueReq)
return issueReq{userID: req.GetUserId(), domainID: req.GetDomainId(), keyType: auth.KeyType(req.GetType())}, nil
}
func decodeRefreshRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.RefreshReq)
return refreshReq{refreshToken: req.GetRefreshToken(), domainID: req.GetDomainId()}, nil
}
func encodeIssueResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(issueRes)
return &magistrala.Token{
AccessToken: res.accessToken,
RefreshToken: &res.refreshToken,
AccessType: res.accessType,
}, nil
}
func decodeIdentifyRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.IdentityReq)
return identityReq{token: req.GetToken()}, nil
}
func encodeIdentifyResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(identityRes)
return &magistrala.IdentityRes{Id: res.id, UserId: res.userID, DomainId: res.domainID}, nil
}
func decodeAuthorizeRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.AuthorizeReq)
return authReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
SubjectKind: req.GetSubjectKind(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
Object: req.GetObject(),
}, nil
}
func encodeAuthorizeResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(authorizeRes)
return &magistrala.AuthorizeRes{Authorized: res.authorized, Id: res.id}, nil
}
func decodeAddPolicyRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.AddPolicyReq)
return policyReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
SubjectKind: req.GetSubjectKind(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
ObjectKind: req.GetObjectKind(),
Object: req.GetObject(),
}, nil
}
func encodeAddPolicyResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(addPolicyRes)
return &magistrala.AddPolicyRes{Added: res.added}, nil
}
func decodeAddPoliciesRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
reqs := grpcReq.(*magistrala.AddPoliciesReq)
r := policiesReq{}
for _, req := range reqs.AddPoliciesReq {
r = append(r, policyReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
SubjectKind: req.GetSubjectKind(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
ObjectKind: req.GetObjectKind(),
Object: req.GetObject(),
})
}
return r, nil
}
func encodeAddPoliciesResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(addPoliciesRes)
return &magistrala.AddPoliciesRes{Added: res.added}, nil
}
func decodeDeletePolicyRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.DeletePolicyReq)
return policyReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
SubjectKind: req.GetSubjectKind(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
ObjectKind: req.GetObjectKind(),
Object: req.GetObject(),
}, nil
}
func encodeDeletePolicyResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(deletePolicyRes)
return &magistrala.DeletePolicyRes{Deleted: res.deleted}, nil
}
func decodeDeletePoliciesRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
reqs := grpcReq.(*magistrala.DeletePoliciesReq)
r := policiesReq{}
for _, req := range reqs.DeletePoliciesReq {
r = append(r, policyReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
SubjectKind: req.GetSubjectKind(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
ObjectKind: req.GetObjectKind(),
Object: req.GetObject(),
})
}
return r, nil
}
func encodeDeletePoliciesResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(deletePoliciesRes)
return &magistrala.DeletePoliciesRes{Deleted: res.deleted}, nil
}
func decodeListObjectsRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.ListObjectsReq)
return listObjectsReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
Object: req.GetObject(),
NextPageToken: req.GetNextPageToken(),
Limit: req.GetLimit(),
}, nil
}
func encodeListObjectsResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(listObjectsRes)
return &magistrala.ListObjectsRes{Policies: res.policies}, nil
}
func decodeCountObjectsRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.CountObjectsReq)
return countObjectsReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
Object: req.GetObject(),
}, nil
}
func encodeCountObjectsResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(countObjectsRes)
return &magistrala.CountObjectsRes{Count: int64(res.count)}, nil
}
func decodeListSubjectsRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.ListSubjectsReq)
return listSubjectsReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
Object: req.GetObject(), NextPageToken: req.GetNextPageToken(), Limit: req.GetLimit(),
}, nil
}
func encodeListSubjectsResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(listSubjectsRes)
return &magistrala.ListSubjectsRes{Policies: res.policies}, nil
}
func decodeCountSubjectsRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.CountSubjectsReq)
return countSubjectsReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
Subject: req.GetSubject(),
Relation: req.GetRelation(),
Permission: req.GetPermission(),
ObjectType: req.GetObjectType(),
Object: req.GetObject(),
}, nil
}
func encodeCountSubjectsResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(countSubjectsRes)
return &magistrala.CountSubjectsRes{Count: int64(res.count)}, nil
}
func decodeListPermissionsRequest(_ context.Context, grpcReq interface{}) (interface{}, error) {
req := grpcReq.(*magistrala.ListPermissionsReq)
var fp []string
switch req.GetObjectType() {
case auth.ThingType:
fp = defThingsFilterPermissions
case auth.GroupType:
fp = defGroupsFilterPermissions
case auth.PlatformType:
fp = defPlatformFilterPermissions
case auth.DomainType:
fp = defDomainsFilterPermissions
default:
return nil, apiutil.ErrMalformedPolicy
}
if len(req.GetFilterPermissions()) > 0 {
fp = req.GetFilterPermissions()
}
return listPermissionsReq{
Domain: req.GetDomain(),
SubjectType: req.GetSubjectType(),
Subject: req.GetSubject(),
SubjectRelation: req.GetSubjectRelation(),
ObjectType: req.GetObjectType(),
Object: req.GetObject(),
FilterPermissions: fp,
}, nil
}
func encodeListPermissionsResponse(_ context.Context, grpcRes interface{}) (interface{}, error) {
res := grpcRes.(listPermissionsRes)
return &magistrala.ListPermissionsRes{
Domain: res.Domain,
SubjectType: res.SubjectType,
Subject: res.Subject,
SubjectRelation: res.SubjectRelation,
ObjectType: res.ObjectType,
Object: res.Object,
Permissions: res.Permissions,
}, nil
}
func encodeError(err error) error {
switch {
case errors.Contains(err, nil):
return nil
case errors.Contains(err, errors.ErrMalformedEntity),
errors.Contains(err, svcerr.ErrInvalidPolicy),
err == apiutil.ErrInvalidAuthKey,
err == apiutil.ErrMissingID,
err == apiutil.ErrMissingMemberType,
err == apiutil.ErrMissingPolicySub,
err == apiutil.ErrMissingPolicyObj,
err == apiutil.ErrMalformedPolicyAct:
return status.Error(codes.InvalidArgument, err.Error())
case errors.Contains(err, errors.ErrAuthentication),
errors.Contains(err, svcerr.ErrAuthentication),
errors.Contains(err, auth.ErrKeyExpired),
err == apiutil.ErrMissingEmail,
err == apiutil.ErrBearerToken:
return status.Error(codes.Unauthenticated, err.Error())
case errors.Contains(err, errors.ErrAuthorization),
errors.Contains(err, svcerr.ErrAuthorization),
errors.Contains(err, errors.ErrDomainAuthorization):
return status.Error(codes.PermissionDenied, err.Error())
case errors.Contains(err, errors.ErrNotFound):
return status.Error(codes.NotFound, err.Error())
case errors.Contains(err, errors.ErrConflict):
return status.Error(codes.AlreadyExists, err.Error())
default:
return status.Error(codes.Internal, err.Error())
}
}