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factory.go
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factory.go
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/*
* Copyright 2019 Insolar Technologies
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package delegationtoken
import (
"bytes"
"encoding/gob"
"github.com/insolar/insolar/core"
"github.com/insolar/insolar/core/message"
)
type delegationTokenFactory struct {
Cryptography core.CryptographyService `inject:""`
}
// NewDelegationTokenFactory creates new token factory instance.
func NewDelegationTokenFactory() core.DelegationTokenFactory {
return &delegationTokenFactory{}
}
// IssuePendingExecution creates new token for provided message.
func (f *delegationTokenFactory) IssuePendingExecution(
msg core.Message, pulse core.PulseNumber,
) (core.DelegationToken, error) {
var buff bytes.Buffer
enc := gob.NewEncoder(&buff)
err := enc.Encode(msg)
if err != nil {
return nil, err
}
sign, err := f.Cryptography.Sign(buff.Bytes())
if err != nil {
return nil, err
}
token := &PendingExecutionToken{}
token.Signature = sign.Bytes()
return token, nil
}
// IssueGetObjectRedirect creates new token for provided message.
func (f *delegationTokenFactory) IssueGetObjectRedirect(
sender *core.RecordRef, redirectedMessage core.Message,
) (core.DelegationToken, error) {
parsedMessage := redirectedMessage.(*message.GetObject)
dataForSign := append(sender.Bytes(), message.ToBytes(parsedMessage)...)
sign, err := f.Cryptography.Sign(dataForSign)
if err != nil {
return nil, err
}
return &GetObjectRedirectToken{Signature: sign.Bytes()}, nil
}
// IssueGetChildrenRedirect creates new token for provided message.
func (f *delegationTokenFactory) IssueGetChildrenRedirect(
sender *core.RecordRef, redirectedMessage core.Message,
) (core.DelegationToken, error) {
parsedMessage := redirectedMessage.(*message.GetChildren)
dataForSign := append(sender.Bytes(), message.ToBytes(parsedMessage)...)
sign, err := f.Cryptography.Sign(dataForSign)
if err != nil {
return nil, err
}
return &GetChildrenRedirectToken{Signature: sign.Bytes()}, nil
}
// IssueGetCodeRedirect creates new token for provided message.
func (f *delegationTokenFactory) IssueGetCodeRedirect(
sender *core.RecordRef, redirectedMessage core.Message,
) (core.DelegationToken, error) {
parsedMessage := redirectedMessage.(*message.GetCode)
dataForSign := append(sender.Bytes(), message.ToBytes(parsedMessage)...)
sign, err := f.Cryptography.Sign(dataForSign)
if err != nil {
return nil, err
}
return &GetCodeRedirectToken{Signature: sign.Bytes()}, nil
}
// Verify performs token validation.
func (f *delegationTokenFactory) Verify(parcel core.Parcel) (bool, error) {
if parcel.DelegationToken() == nil {
return false, nil
}
return parcel.DelegationToken().Verify(parcel)
}