/
identity.go
161 lines (137 loc) · 4.6 KB
/
identity.go
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// Package identityprovider defines a default identity provider for IPFS Log and OrbitDB.
package identityprovider // import "berty.tech/go-ipfs-log/identityprovider"
import (
"encoding/base64"
"encoding/hex"
cbornode "github.com/ipfs/go-ipld-cbor"
ic "github.com/libp2p/go-libp2p-core/crypto"
"github.com/polydawn/refmt/obj/atlas"
"berty.tech/go-ipfs-log/errmsg"
)
type IdentitySignature struct {
ID []byte `json:"id,omitempty"`
PublicKey []byte `json:"publicKey,omitempty"`
}
type CborIdentitySignature struct {
ID string
PublicKey string
}
type Identity struct {
ID string `json:"id,omitempty"`
PublicKey []byte `json:"publicKey,omitempty"`
Signatures *IdentitySignature `json:"signatures,omitempty"`
Type string `json:"type,omitempty"`
Provider Interface
}
type CborIdentity struct {
ID string
PublicKey string
Signatures *CborIdentitySignature
Type string
}
// Filtered gets fields that should be present in the CBOR representation of identity.
func (i *Identity) Filtered() *Identity {
return &Identity{
ID: i.ID,
PublicKey: i.PublicKey,
Signatures: i.Signatures,
Type: i.Type,
}
}
// GetPublicKey returns the public key of an identity.
func (i *Identity) GetPublicKey() (ic.PubKey, error) {
return ic.UnmarshalPublicKey(i.PublicKey)
}
var atlasIdentity = atlas.BuildEntry(CborIdentity{}).
StructMap().
AddField("ID", atlas.StructMapEntry{SerialName: "id"}).
AddField("Type", atlas.StructMapEntry{SerialName: "type"}).
AddField("PublicKey", atlas.StructMapEntry{SerialName: "publicKey"}).
AddField("Signatures", atlas.StructMapEntry{SerialName: "signatures"}).
Complete()
var atlasIdentitySignature = atlas.BuildEntry(CborIdentitySignature{}).
StructMap().
AddField("ID", atlas.StructMapEntry{SerialName: "id"}).
AddField("PublicKey", atlas.StructMapEntry{SerialName: "publicKey"}).
Complete()
var atlasPubKey = atlas.BuildEntry(ic.Secp256k1PublicKey{}).
Transform().
TransformMarshal(atlas.MakeMarshalTransformFunc(
func(x ic.Secp256k1PublicKey) (string, error) {
keyBytes, err := x.Raw()
if err != nil {
return "", errmsg.ErrNotSecp256k1PubKey.Wrap(err)
}
return base64.StdEncoding.EncodeToString(keyBytes), nil
})).
TransformUnmarshal(atlas.MakeUnmarshalTransformFunc(
func(x string) (ic.Secp256k1PublicKey, error) {
keyBytes, err := base64.StdEncoding.DecodeString(x)
if err != nil {
return ic.Secp256k1PublicKey{}, errmsg.ErrNotSecp256k1PubKey.Wrap(err)
}
key, err := ic.UnmarshalSecp256k1PublicKey(keyBytes)
if err != nil {
return ic.Secp256k1PublicKey{}, errmsg.ErrNotSecp256k1PubKey.Wrap(err)
}
secpKey, ok := key.(*ic.Secp256k1PublicKey)
if !ok {
return ic.Secp256k1PublicKey{}, errmsg.ErrNotSecp256k1PubKey
}
return *secpKey, nil
})).
Complete()
func init() {
cbornode.RegisterCborType(atlasIdentity)
cbornode.RegisterCborType(atlasIdentitySignature)
cbornode.RegisterCborType(atlasPubKey)
}
// ToCborIdentity converts an identity to a CBOR serializable identity.
func (i *Identity) ToCborIdentity() *CborIdentity {
return &CborIdentity{
ID: i.ID,
PublicKey: hex.EncodeToString(i.PublicKey),
Type: i.Type,
Signatures: i.Signatures.ToCborIdentitySignature(),
}
}
// ToIdentity converts a CBOR serializable to a plain Identity object.
func (c *CborIdentity) ToIdentity(provider Interface) (*Identity, error) {
publicKey, err := hex.DecodeString(c.PublicKey)
if err != nil {
return nil, errmsg.ErrIdentityDeserialization.Wrap(err)
}
idSignatures, err := c.Signatures.ToIdentitySignature()
if err != nil {
return nil, errmsg.ErrIdentityDeserialization.Wrap(err)
}
return &Identity{
Signatures: idSignatures,
PublicKey: publicKey,
Type: c.Type,
ID: c.ID,
Provider: provider,
}, nil
}
// ToCborIdentitySignature converts to a CBOR serialized identity signature a plain IdentitySignature.
func (i *IdentitySignature) ToCborIdentitySignature() *CborIdentitySignature {
return &CborIdentitySignature{
ID: hex.EncodeToString(i.ID),
PublicKey: hex.EncodeToString(i.PublicKey),
}
}
// ToIdentitySignature converts a CBOR serializable identity signature to a plain IdentitySignature.
func (c *CborIdentitySignature) ToIdentitySignature() (*IdentitySignature, error) {
publicKey, err := hex.DecodeString(c.PublicKey)
if err != nil {
return nil, errmsg.ErrIdentitySigDeserialization.Wrap(err)
}
id, err := hex.DecodeString(c.ID)
if err != nil {
return nil, errmsg.ErrIdentitySigDeserialization.Wrap(err)
}
return &IdentitySignature{
PublicKey: publicKey,
ID: id,
}, nil
}