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accesscontroller_ipfs.go
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/
accesscontroller_ipfs.go
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package ipfs
import (
"context"
"encoding/json"
"fmt"
"sync"
logac "berty.tech/go-ipfs-log/accesscontroller"
"berty.tech/go-ipfs-log/identityprovider"
"berty.tech/go-ipfs-log/io"
"berty.tech/go-orbit-db/accesscontroller"
"berty.tech/go-orbit-db/address"
"berty.tech/go-orbit-db/events"
"berty.tech/go-orbit-db/iface"
"github.com/ipfs/go-cid"
cbornode "github.com/ipfs/go-ipld-cbor"
coreapi "github.com/ipfs/interface-go-ipfs-core"
"github.com/pkg/errors"
"github.com/polydawn/refmt/obj/atlas"
"go.uber.org/zap"
)
type cborWriteAccess struct {
Write string
}
type ipfsAccessController struct {
events.EventEmitter
ipfs coreapi.CoreAPI
writeAccess []string
muWriteAccess sync.RWMutex
logger *zap.Logger
}
func (i *ipfsAccessController) Type() string {
return "ipfs"
}
func (i *ipfsAccessController) Address() address.Address {
return nil
}
func (i *ipfsAccessController) CanAppend(entry logac.LogEntry, p identityprovider.Interface, additionalContext accesscontroller.CanAppendAdditionalContext) error {
i.muWriteAccess.RLock()
defer i.muWriteAccess.RUnlock()
key := entry.GetIdentity().ID
for _, allowedKey := range i.writeAccess {
if allowedKey == key || allowedKey == "*" {
return p.VerifyIdentity(entry.GetIdentity())
}
}
return errors.New("not allowed")
}
func (i *ipfsAccessController) GetAuthorizedByRole(role string) ([]string, error) {
i.muWriteAccess.RLock()
defer i.muWriteAccess.RUnlock()
if role == "admin" || role == "write" {
return i.writeAccess, nil
}
return nil, nil
}
func (i *ipfsAccessController) Grant(ctx context.Context, capability string, keyID string) error {
return errors.New("not implemented - does not exist in JS version")
}
func (i *ipfsAccessController) Revoke(ctx context.Context, capability string, keyID string) error {
return errors.New("not implemented - does not exist in JS version")
}
func (i *ipfsAccessController) Load(ctx context.Context, address string) error {
i.logger.Debug(fmt.Sprintf("reading IPFS access controller write access on hash %s", address))
c, err := cid.Decode(address)
if err != nil {
return errors.Wrap(err, "unable to parse cid")
}
res, err := io.ReadCBOR(ctx, i.ipfs, c)
if err != nil {
return errors.Wrap(err, "unable to load access controller manifest data")
}
manifest := &accesscontroller.Manifest{}
err = cbornode.DecodeInto(res.RawData(), manifest)
if err != nil {
return errors.Wrap(err, "unable to unmarshal access controller manifest data")
}
res, err = io.ReadCBOR(ctx, i.ipfs, manifest.Params.GetAddress())
if err != nil {
return errors.Wrap(err, "unable to load access controller data")
}
writeAccessData := &cborWriteAccess{}
err = cbornode.DecodeInto(res.RawData(), writeAccessData)
if err != nil {
return errors.Wrap(err, "unable to unmarshal access controller data")
}
var writeAccess []string
if err := json.Unmarshal([]byte(writeAccessData.Write), &writeAccess); err != nil {
return errors.Wrap(err, "unable to unmarshal json write access")
}
i.muWriteAccess.Lock()
i.writeAccess = writeAccess
i.muWriteAccess.Unlock()
return nil
}
func (i *ipfsAccessController) Save(ctx context.Context) (accesscontroller.ManifestParams, error) {
i.muWriteAccess.RLock()
writeAccess, err := json.Marshal(i.writeAccess)
i.muWriteAccess.RUnlock()
if err != nil {
return nil, errors.Wrap(err, "unable to serialize write access")
}
c, err := io.WriteCBOR(ctx, i.ipfs, &cborWriteAccess{Write: string(writeAccess)}, nil)
if err != nil {
return nil, errors.Wrap(err, "unable to save access controller")
}
i.logger.Debug(fmt.Sprintf("saved IPFS access controller write access on hash %s", c.String()))
return accesscontroller.NewManifestParams(c, false, i.Type()), nil
}
func (i *ipfsAccessController) Close() error {
return errors.New("not implemented - does not exist in JS version")
}
// NewIPFSAccessController Returns an access controller for IPFS
func NewIPFSAccessController(_ context.Context, db iface.BaseOrbitDB, params accesscontroller.ManifestParams, options ...accesscontroller.Option) (accesscontroller.Interface, error) {
if params == nil {
return &ipfsAccessController{}, errors.New("an options object must be passed")
}
if db == nil {
return &ipfsAccessController{}, errors.New("an OrbitDB instance is required")
}
if len(params.GetAccess("write")) == 0 {
params.SetAccess("write", []string{db.Identity().ID})
}
allowedIDs := params.GetAccess("write")
ac := &ipfsAccessController{
ipfs: db.IPFS(),
writeAccess: allowedIDs,
}
for _, o := range options {
o(ac)
}
return ac, nil
}
func (i *ipfsAccessController) SetLogger(logger *zap.Logger) {
i.muWriteAccess.Lock()
defer i.muWriteAccess.Unlock()
i.logger = logger
}
func (i *ipfsAccessController) Logger() *zap.Logger {
i.muWriteAccess.RLock()
defer i.muWriteAccess.RUnlock()
return i.logger
}
var _ accesscontroller.Interface = &ipfsAccessController{}
func init() {
AtlasEntry := atlas.BuildEntry(cborWriteAccess{}).
StructMap().
AddField("Write", atlas.StructMapEntry{SerialName: "write"}).
Complete()
cbornode.RegisterCborType(AtlasEntry)
}