Official Go implementation of the Ethereum protocol
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go-ethereum/swarm/storage/mru/update.go

148 lines
5.0 KiB

swarm/storage/mru: Client-side MRU signatures (#784) * swarm/storage/mru: Add embedded publickey and remove ENS dep This commit breaks swarm, swarm/api... but tests in swarm/storage/mru pass * swarm: Refactor swarm, swarm/api to mru changes, make tests pass * swarm/storage/mru: Remove self from recv, remove test ens vldtr * swarm/storage/mru: Remove redundant test, expose ResourceHash mthd * swarm/storage/mru: Make HeaderGetter mandatory + godoc fixes * swarm/storage: Remove validator prefix for metadata chunk * swarm/storage/mru: Use Address instead of PublicKey * swarm/storage/mru: Change index from name to metadata chunk addr * swarm/storage/mru: Refactor swarm/api/... to MRU index changes * swarm/storage/mru: Refactor cleanup * swarm/storage/mru: Rebase cleanup * swarm: Use constructor for GenericSigner MRU in swarm.go * swarm/storage: Change to BMTHash for MRU hashing * swarm/storage: Reduce loglevel on chunk validator logs * swarm/storage/mru: Delint * swarm: MRU Rebase cleanup * swarm/storage/mru: client-side mru signatures Rebase to PR #668 and fix all conflicts * swarm/storage/mru: refactor and documentation * swarm/resource/mru: error-checking tests for parseUpdate/newUpdateChunk * swarm/storage/mru: Added resourcemetadata tests * swarm/storage/mru: Added tests for UpdateRequest * swarm/storage/mru: more test coverage for UpdateRequest and comments * swarm/storage/mru: Avoid fake chunks in parseUpdate() * swarm/storage/mru: Documented resource.go extensively moved some functions where they make most sense * swarm/storage/mru: increase test coverage for UpdateRequest and variable name changes throughout to increase consistency * swarm/storage/mru: moved default timestamp to NewCreateRequest- * swarm/storage/mru: lookup refactor * swarm/storage/mru: added comments and renamed raw flag to rawmru * swarm/storage/mru: fix receiver typo * swarm/storage/mru: refactored update chunk new/create * swarm/storage/mru: refactored signature digest to avoid malleability * swarm/storage/mru: optimize update data serialization * swarm/storage/mru: refactor and cleanup * swarm/storage/mru: add timestamp struct and serialization * swarm/storage/mru: fix lint error and mark some old code for deletion * swarm/storage/mru: remove unnecessary variable * swarm/storage/mru: Added more comments throughout * swarm/storage/mru: Refactored metadata chunk layout + extensive error... * swarm/storage/mru: refactor cli parser Changed resource info output to JSON * swarm/storage/mru: refactor serialization for extensibility refactored error messages to NewErrorf * swarm/storage/mru: Moved Signature to resource_sign. Check Sign errors in server tests * swarm/storage/mru: Remove isSafeName() checks * swarm/storage/mru: scrubbed off all references to "block" for time * swarm/storage/mru: removed superfluous isSynced() call. * swarm/storage/mru: remove isMultihash() and ToSafeName functions * swarm/storage/mru: various fixes and comments * swarm/storage/mru: decoupled cli for independent create/update * Made resource name optional * Removed unused LookupPrevious * swarm/storage/mru: Decoupled resource create / update & refactor * swarm/storage/mru: Fixed some comments as per issues raised in PR #743 * swarm/storage/mru: Cosmetic changes as per #743 comments * swarm/storage/mru: refct request encoder/decoder > marshal/unmarshal * swarm/storage/mru: Cosmetic changes as per review in #748 * swarm/storage/mru: removed timestamp proof placeholder * swarm/storage/mru: cosmetic/doc/fixes changes as per comments in #704 * swarm/storage/mru: removed unnecessary check in Handler.update * swarm/storage/mru: Implemented Marshaler/Unmarshaler iface in Request * swarm/storage/mru: Fixed linter error * swarm/storage/mru: removed redundant address in signature digest * swarm/storage/mru: fixed bug: LookupLatestVersionInPeriod not working * swarm/storage/mru: Unfold Request creation API for create or update+create set common time source for mru package * swarm/api/http: fix HandleGetResource error variable shadowed when requesting a resource that does not exist * swarm/storage/mru: Add simple check to detect duplicate updates * swarm/storage/mru: moved Multihash() to the right place. * cmd/swarm: remove unneeded clientaccountmanager.go * swarm/storage/mru: Changed some comments as per reviews in #784 * swarm/storage/mru: Made SignedResourceUpdate.GetDigest() public * swarm/storage/mru: cosmetic changes as per comments in #784 * cmd/swarm: Inverted --multihash flag default * swarm/storage/mru: removed Verify from SignedResourceUpdate.fromChunk * swarm/storage/mru: Moved validation code out of serializer Cosmetic / comment changes * swarm/storage/mru: Added unit tests for UpdateLookup * swarm/storage/mru: Increased coverage of metadata serialization * swarm/storage/mru: Increased test coverage of updateHeader serializers * swarm/storage/mru: Add resourceUpdate serializer test
6 years ago
// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
import (
"encoding/binary"
"errors"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/multihash"
)
// resourceUpdate encapsulates the information sent as part of a resource update
type resourceUpdate struct {
updateHeader // metainformationa about this resource update
data []byte // actual data payload
}
// Update chunk layout
// Prefix:
// 2 bytes updateHeaderLength
// 2 bytes data length
const chunkPrefixLength = 2 + 2
// Header: (see updateHeader)
// Data:
// data (datalength bytes)
//
// Minimum size is Header + 1 (minimum data length, enforced)
const minimumUpdateDataLength = updateHeaderLength + 1
const maxUpdateDataLength = chunkSize - signatureLength - updateHeaderLength - chunkPrefixLength
// binaryPut serializes the resource update information into the given slice
func (r *resourceUpdate) binaryPut(serializedData []byte) error {
datalength := len(r.data)
if datalength == 0 {
return NewError(ErrInvalidValue, "cannot update a resource with no data")
}
if datalength > maxUpdateDataLength {
return NewErrorf(ErrInvalidValue, "data is too big (length=%d). Max length=%d", datalength, maxUpdateDataLength)
}
if len(serializedData) != r.binaryLength() {
return NewErrorf(ErrInvalidValue, "slice passed to putBinary must be of exact size. Expected %d bytes", r.binaryLength())
}
if r.multihash {
if _, _, err := multihash.GetMultihashLength(r.data); err != nil {
return NewError(ErrInvalidValue, "Invalid multihash")
}
}
// Add prefix: updateHeaderLength and actual data length
cursor := 0
binary.LittleEndian.PutUint16(serializedData[cursor:], uint16(updateHeaderLength))
cursor += 2
// data length
binary.LittleEndian.PutUint16(serializedData[cursor:], uint16(datalength))
cursor += 2
// serialize header (see updateHeader)
if err := r.updateHeader.binaryPut(serializedData[cursor : cursor+updateHeaderLength]); err != nil {
return err
}
cursor += updateHeaderLength
// add the data
copy(serializedData[cursor:], r.data)
cursor += datalength
return nil
}
// binaryLength returns the expected number of bytes this structure will take to encode
func (r *resourceUpdate) binaryLength() int {
return chunkPrefixLength + updateHeaderLength + len(r.data)
}
// binaryGet populates this instance from the information contained in the passed byte slice
func (r *resourceUpdate) binaryGet(serializedData []byte) error {
if len(serializedData) < minimumUpdateDataLength {
return NewErrorf(ErrNothingToReturn, "chunk less than %d bytes cannot be a resource update chunk", minimumUpdateDataLength)
}
cursor := 0
declaredHeaderlength := binary.LittleEndian.Uint16(serializedData[cursor : cursor+2])
if declaredHeaderlength != updateHeaderLength {
return NewErrorf(ErrCorruptData, "Invalid header length. Expected %d, got %d", updateHeaderLength, declaredHeaderlength)
}
cursor += 2
datalength := int(binary.LittleEndian.Uint16(serializedData[cursor : cursor+2]))
cursor += 2
if chunkPrefixLength+updateHeaderLength+datalength+signatureLength != len(serializedData) {
return NewError(ErrNothingToReturn, "length specified in header is different than actual chunk size")
}
// at this point we can be satisfied that we have the correct data length to read
if err := r.updateHeader.binaryGet(serializedData[cursor : cursor+updateHeaderLength]); err != nil {
return err
}
cursor += updateHeaderLength
data := serializedData[cursor : cursor+datalength]
cursor += datalength
// if multihash content is indicated we check the validity of the multihash
if r.updateHeader.multihash {
mhLength, mhHeaderLength, err := multihash.GetMultihashLength(data)
if err != nil {
log.Error("multihash parse error", "err", err)
return err
}
if datalength != mhLength+mhHeaderLength {
log.Debug("multihash error", "datalength", datalength, "mhLength", mhLength, "mhHeaderLength", mhHeaderLength)
return errors.New("Corrupt multihash data")
}
}
// now that all checks have passed, copy data into structure
r.data = make([]byte, datalength)
copy(r.data, data)
return nil
}
// Multihash specifies whether the resource data should be interpreted as multihash
func (r *resourceUpdate) Multihash() bool {
return r.multihash
}