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Commit 7fda94e9 authored by Richer Maximilien's avatar Richer Maximilien Committed by Loïck Bonniot
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[c] Implement evidences reception and emission

parent 525d85ce
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Showing with 388 additions and 258 deletions
dfssc/api/client.pb.go
View file @ 7fda94e9
......@@ -36,11 +36,16 @@ const _ = proto.ProtoPackageIsVersion1
// Promise message contains all the required information to verify
// the identity of the sender and reciever, and the actual promise
//
// * sequence is transmitted by platform and identical across clients
// * TODO implement an global signature for content
type Promise struct {
RecipientKeyHash []byte `protobuf:"bytes,1,opt,name=recipientKeyHash,proto3" json:"recipientKeyHash,omitempty"`
SenderKeyHash []byte `protobuf:"bytes,2,opt,name=senderKeyHash,proto3" json:"senderKeyHash,omitempty"`
SignatureUuid string `protobuf:"bytes,3,opt,name=signatureUuid" json:"signatureUuid,omitempty"`
ContractUuid string `protobuf:"bytes,4,opt,name=contractUuid" json:"contractUuid,omitempty"`
RecipientKeyHash []byte `protobuf:"bytes,1,opt,name=recipientKeyHash,proto3" json:"recipientKeyHash,omitempty"`
SenderKeyHash []byte `protobuf:"bytes,2,opt,name=senderKeyHash,proto3" json:"senderKeyHash,omitempty"`
Index uint32 `protobuf:"varint,3,opt,name=index" json:"index,omitempty"`
ContractDocumentHash string `protobuf:"bytes,4,opt,name=contractDocumentHash" json:"contractDocumentHash,omitempty"`
SignatureUuid string `protobuf:"bytes,5,opt,name=signatureUuid" json:"signatureUuid,omitempty"`
ContractUuid string `protobuf:"bytes,6,opt,name=contractUuid" json:"contractUuid,omitempty"`
}
func (m *Promise) Reset() { *m = Promise{} }
......@@ -63,7 +68,8 @@ func (m *Signature) String() string { return proto.CompactTextString(
func (*Signature) ProtoMessage() {}
func (*Signature) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
// Hello message is used when discovering peers. It contains the current version of the software.
// Hello message is used when discovering peers.
// It contains the current version of the software.
type Hello struct {
Version string `protobuf:"bytes,1,opt,name=version" json:"version,omitempty"`
}
......@@ -199,24 +205,24 @@ var _Client_serviceDesc = grpc.ServiceDesc{
}
var fileDescriptor0 = []byte{
// 302 bytes of a gzipped FileDescriptorProto
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// 303 bytes of a gzipped FileDescriptorProto
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}
dfssc/api/client.proto
View file @ 7fda94e9
......@@ -12,11 +12,17 @@ service Client {
// Promise message contains all the required information to verify
// the identity of the sender and reciever, and the actual promise
//
// * sequence is transmitted by platform and identical across clients
// * TODO implement an global signature for content
message Promise {
bytes recipientKeyHash = 1; // SHA-512
bytes senderKeyHash = 2; // SHA-512
string signatureUuid = 3;
string contractUuid = 4;
bytes recipientKeyHash = 1; // SHA-512
bytes senderKeyHash = 2; // SHA-512
uint32 index = 3; // The index of the sequence for this message
string contractDocumentHash = 4; // Hash of the contract to be signed
string signatureUuid = 5; // Avoid re-use of the promise in another ctx
string contractUuid = 6;
// TODO the crypto payload
}
// Signature message contains all the required information to verify
......@@ -29,7 +35,8 @@ message Signature {
string contractUuid = 5;
}
// Hello message is used when discovering peers. It contains the current version of the software.
// Hello message is used when discovering peers.
// It contains the current version of the software.
message Hello {
string version = 1;
}
dfssc/sign/promises.go 0 → 100644
View file @ 7fda94e9
package sign
import (
"errors"
"fmt"
"time"
cAPI "dfss/dfssc/api"
dAPI "dfss/dfssd/api"
pAPI "dfss/dfssp/api"
"golang.org/x/net/context"
"google.golang.org/grpc"
)
// CreatePromise creates a promise from 'from' to 'to', in the context of the SignatureManager
// provided the specified sequence indexes are valid
func (m *SignatureManager) CreatePromise(from, to uint32) (*cAPI.Promise, error) {
if int(from) >= len(m.keyHash) || int(to) >= len(m.keyHash) {
return nil, errors.New("Invalid id for promise creation")
}
if m.currentIndex < 0 {
return nil, errors.New("Invalid currentIndex for promise creation")
}
promise := &cAPI.Promise{
RecipientKeyHash: m.keyHash[to],
SenderKeyHash: m.keyHash[from],
Index: uint32(m.currentIndex),
ContractDocumentHash: m.contract.File.Hash,
SignatureUuid: m.uuid,
ContractUuid: m.contract.UUID,
}
return promise, nil
}
// SendPromise sends the specified promise to the specified peer
func (m *SignatureManager) SendPromise(promise *cAPI.Promise, to uint32) (*pAPI.ErrorCode, error) {
connection, err := m.GetClient(to)
if err != nil {
return &pAPI.ErrorCode{}, err
}
// Handle the timeout
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
errCode, err := (*connection).TreatPromise(ctx, promise)
if err == grpc.ErrClientConnTimeout {
dAPI.DLog("Promise timeout for [" + fmt.Sprintf("%d", to) + "]")
return &pAPI.ErrorCode{Code: pAPI.ErrorCode_TIMEOUT, Message: "promise timeout"}, err
} else if err != nil {
return &pAPI.ErrorCode{Code: pAPI.ErrorCode_INTERR, Message: "internal server error"}, err
}
m.archives.sentPromises = append(m.archives.sentPromises, promise)
return errCode, nil
}
dfssc/sign/protocol.go
View file @ 7fda94e9
package sign
import (
"errors"
"fmt"
"time"
cAPI "dfss/dfssc/api"
"dfss/dfssc/common"
dAPI "dfss/dfssd/api"
pAPI "dfss/dfssp/api"
"golang.org/x/net/context"
"google.golang.org/grpc"
)
// Sign makes the SignatureManager perform its specified signature
var (
hashToID map[string]uint32
incomingPromises chan *cAPI.Promise
incomingSignatures chan *cAPI.Signature
)
// Sign performe all the message exchange for the contract to be signed
//
// * Initialize the SignatureManager from starter.go
// * Compute the reversed map [mail -> ID] of signers
// * Make channels for handlers
// * Promises rounds
// * Signature round
func (m *SignatureManager) Sign() error {
myID, currentIndex, nextIndex, err := m.Initialize()
myID, nextIndex, err := m.Initialize()
if err != nil {
return err
}
hashToID = m.makeSignersHashToIDMap()
incomingPromises = make(chan *cAPI.Promise)
incomingSignatures = make(chan *cAPI.Signature)
// Promess rounds
for nextIndex != -1 {
pendingSet, err1 := common.GetPendingSet(m.sequence, myID, currentIndex)
// Follow the sequence until there is no next occurence of me
for nextIndex > 0 {
// Set of the promise we are waiting for
pendingSet, err1 := common.GetPendingSet(m.sequence, myID, m.currentIndex)
if err1 != nil {
return err1 // err is renamed to avoid shadowing err on linter check
}
sendSet, err1 := common.GetSendSet(m.sequence, myID, currentIndex)
// Set of the promises we must send
sendSet, err1 := common.GetSendSet(m.sequence, myID, m.currentIndex)
if err1 != nil {
return err1
}
// Reception of the due promesses
for len(pendingSet) != 0 {
i := 0
// TODO
// Improve, because potential memory leak
// see https://github.com/golang/go/wiki/SliceTricks
pendingSet = append(pendingSet[:i], pendingSet[i+1:]...)
}
c := make(chan int)
// Sending of the due promesses
/*
for _, id := range sendSet {
go func(id) {
promise, err := m.CreatePromise(id)
recpt := m.SendPromise(promise, id)
c <- id
}(id)
}
*/
// Verifying we sent all the due promesses
for _ = range sendSet {
<-c
}
// Exchange messages
m.promiseRound(pendingSet, sendSet, myID)
currentIndex = nextIndex
nextIndex, err1 = common.FindNextIndex(m.sequence, myID, currentIndex)
m.currentIndex = nextIndex
nextIndex, err1 = common.FindNextIndex(m.sequence, myID, m.currentIndex)
if err1 != nil {
return err1
}
......@@ -78,46 +71,6 @@ func (m *SignatureManager) Sign() error {
return nil
}
// CreatePromise creates a promise from 'from' to 'to', in the context of the SignatureManager
// provided the specified sequence indexes are valid
func (m *SignatureManager) CreatePromise(from, to uint32) (*cAPI.Promise, error) {
if int(from) >= len(m.keyHash) || int(to) >= len(m.keyHash) {
return &cAPI.Promise{}, errors.New("Invalid id for promise creation")
}
promise := &cAPI.Promise{
RecipientKeyHash: m.keyHash[to],
SenderKeyHash: m.keyHash[from],
SignatureUuid: m.uuid,
ContractUuid: m.contract.UUID,
}
return promise, nil
}
// SendPromise sends the specified promise to the specified peer
// TODO
func (m *SignatureManager) SendPromise(promise *cAPI.Promise, to uint32) (*pAPI.ErrorCode, error) {
connection, err := m.GetClient(to)
if err != nil {
return &pAPI.ErrorCode{}, err
}
// Handle the timeout
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
errCode, err := (*connection).TreatPromise(ctx, promise)
if err == grpc.ErrClientConnTimeout {
dAPI.DLog("Promise timeout for [" + fmt.Sprintf("%d", to) + "]")
return &pAPI.ErrorCode{Code: pAPI.ErrorCode_TIMEOUT, Message: "promise timeout"}, err
} else if err != nil {
return &pAPI.ErrorCode{Code: pAPI.ErrorCode_INTERR, Message: "internal server error"}, err
}
m.archives.sentPromises = append(m.archives.sentPromises, promise)
return errCode, nil
}
// GetClient retrieves the Client to the specified sequence id provided it exists
func (m *SignatureManager) GetClient(to uint32) (*cAPI.ClientClient, error) {
mailto := m.contract.Signers[to].Email
......@@ -129,75 +82,61 @@ func (m *SignatureManager) GetClient(to uint32) (*cAPI.ClientClient, error) {
return m.peers[mailto], nil
}
// SendAllSigns creates and sends signatures to all the signers of the contract
// TODO
// Use goroutines to send in parallel
func (m *SignatureManager) SendAllSigns() error {
myID, err := m.FindID()
if err != nil {
return err
}
// makeEMailMap build an association to reverse a hash to the sequence ID
func (m *SignatureManager) makeSignersHashToIDMap() map[string]uint32 {
sendSet := common.GetAllButOne(m.sequence, myID)
for _, id := range sendSet {
signature, err := m.CreateSignature(myID, id)
if err != nil {
return err
}
hashToID := make(map[string]uint32)
_, err = m.SendSignature(signature, id)
if err != nil {
return err
}
signers := m.contract.Signers
for id, signer := range signers {
hashToID[signer.Hash] = uint32(id)
}
return nil
return hashToID
}
// CreateSignature creates a signature from from to to, in the context of the SignatureManager
// provided the specified sequence indexes are valid
// TODO
// Implement a true cryptographic signature
func (m *SignatureManager) CreateSignature(from, to uint32) (*cAPI.Signature, error) {
if int(from) >= len(m.keyHash) || int(to) >= len(m.keyHash) {
return &cAPI.Signature{}, errors.New("Invalid id for signature creation")
}
signature := &cAPI.Signature{
RecipientKeyHash: m.keyHash[to],
SenderKeyHash: m.keyHash[from],
Signature: "Signature",
SignatureUuid: m.uuid,
ContractUuid: m.contract.UUID,
func (m *SignatureManager) promiseRound(pendingSet, sendSet []uint32, myID uint32) {
// Reception of the due promises
// TODO this ctx needs a timeout !
for len(pendingSet) > 0 {
promise := <-incomingPromises
senderID, exist := hashToID[string(promise.SenderKeyHash)]
if exist {
var err error
pendingSet, err = common.Remove(pendingSet, senderID)
if err != nil {
// Recieve unexpected promise, ignore ?
}
m.archives.recievedPromises = append(m.archives.recievedPromises, promise)
} else {
// Wrong sender keyHash
}
}
return signature, nil
}
// SendSignature sends the specified signature to the specified peer
// TODO
func (m *SignatureManager) SendSignature(signature *cAPI.Signature, to uint32) (*pAPI.ErrorCode, error) {
connection, err := m.GetClient(to)
if err != nil {
return &pAPI.ErrorCode{}, err
c := make(chan *cAPI.Promise)
// Sending of due promises
for _, id := range sendSet {
// The signature manager is read only - safe !
go func(id uint32, m *SignatureManager) {
promise, err := m.CreatePromise(myID, id)
if err != nil {
// Failed to create promise
}
_, err = m.SendPromise(promise, id)
if err != nil {
// We don't check if the promise has been recieved
}
c <- promise
}(id, m)
}
// TODO
// Handle the timeout
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
defer cancel()
errCode, err := (*connection).TreatSignature(ctx, signature)
if err != nil {
return &pAPI.ErrorCode{}, err
// Verifying we sent all the due promesses
for _ = range sendSet {
promise := <-c
if promise != nil {
m.archives.sentPromises = append(m.archives.sentPromises, promise)
} else {
// something appened during the goroutine
}
}
m.archives.sentSignatures = append(m.archives.sentSignatures, signature)
return errCode, nil
}
// RecieveAllSigns is not done yet
// TODO
func (m *SignatureManager) RecieveAllSigns() error {
return nil
}
dfssc/sign/server.go
View file @ 7fda94e9
......@@ -15,7 +15,11 @@ type clientServer struct{}
//
// Handle incoming TreatPromise messages
func (s *clientServer) TreatPromise(ctx context.Context, in *cAPI.Promise) (*pAPI.ErrorCode, error) {
// TODO
// Pass the message to Sign()
if incomingPromises != nil {
incomingPromises <- in
}
return nil, nil
}
......
dfssc/sign/signatures.go 0 → 100644
View file @ 7fda94e9
package sign
import (
"dfss/dfssc/common"
"errors"
"fmt"
"time"
cAPI "dfss/dfssc/api"
dAPI "dfss/dfssd/api"
pAPI "dfss/dfssp/api"
"golang.org/x/net/context"
"google.golang.org/grpc"
)
// SendAllSigns creates and sends signatures to all the signers of the contract
// TODO Use goroutines to send in parallel
func (m *SignatureManager) SendAllSigns() error {
myID, err := m.FindID()
if err != nil {
return err
}
// compute a set of all signers exept me
sendSet := common.GetAllButOne(m.sequence, myID)
for _, id := range sendSet {
signature, err := m.CreateSignature(myID, id)
if err != nil {
return err
}
_, err = m.SendSignature(signature, id)
if err != nil {
return err
}
}
return nil
}
// CreateSignature creates a signature from a sequence ID to another
// provided the specified sequence indexes are valid
// TODO Implement a true cryptographic signature
func (m *SignatureManager) CreateSignature(from, to uint32) (*cAPI.Signature, error) {
if int(from) >= len(m.keyHash) || int(to) >= len(m.keyHash) {
return &cAPI.Signature{}, errors.New("Invalid id for signature creation")
}
signature := &cAPI.Signature{
RecipientKeyHash: m.keyHash[to],
SenderKeyHash: m.keyHash[from],
Signature: "Signature",
SignatureUuid: m.uuid,
ContractUuid: m.contract.UUID,
}
return signature, nil
}
// SendSignature sends the specified signature to the specified peer
func (m *SignatureManager) SendSignature(signature *cAPI.Signature, to uint32) (*pAPI.ErrorCode, error) {
connection, err := m.GetClient(to)
if err != nil {
return &pAPI.ErrorCode{}, err
}
// Handle the timeout
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
defer cancel()
errCode, err := (*connection).TreatSignature(ctx, signature)
if err == grpc.ErrClientConnTimeout {
dAPI.DLog("Signature timeout for [" + fmt.Sprintf("%d", to) + "]")
return &pAPI.ErrorCode{Code: pAPI.ErrorCode_TIMEOUT, Message: "signature timeout"}, err
} else if err != nil {
return &pAPI.ErrorCode{Code: pAPI.ErrorCode_INTERR, Message: "internal server error"}, err
}
m.archives.sentSignatures = append(m.archives.sentSignatures, signature)
return errCode, nil
}
// RecieveAllSigns is not done yet
func (m *SignatureManager) RecieveAllSigns() error {
myID, err := m.FindID()
if err != nil {
return err
}
// compute a set of all signers exept me
pendingSet := common.GetAllButOne(m.sequence, myID)
// TODO this ctx needs a timeout !
for len(pendingSet) > 0 {
signature := <-incomingSignatures
senderID, exist := hashToID[string(signature.SenderKeyHash)]
if exist {
var err error
pendingSet, err = common.Remove(pendingSet, senderID)
if err != nil {
// Recieve unexpected signature, ignore ?
}
m.archives.recievedSignatures = append(m.archives.recievedSignatures, signature)
} else {
// Wrong sender keyHash
}
}
return nil
}
dfssc/sign/starter.go
View file @ 7fda94e9
......@@ -20,18 +20,19 @@ import (
// SignatureManager handles the signature of a contract.
type SignatureManager struct {
auth *security.AuthContainer
localPort int
contract *contract.JSON
platform pAPI.PlatformClient
peers map[string]*cAPI.ClientClient
nbReady int
cServer *grpc.Server
sequence []uint32
uuid string
keyHash [][]byte
mail string
archives *Archives
auth *security.AuthContainer
localPort int
contract *contract.JSON // contains the contractUUID, the list of the signers' hashes, the hash of the contract
platform pAPI.PlatformClient
peers map[string]*cAPI.ClientClient
nbReady int
cServer *grpc.Server
sequence []uint32
currentIndex int
uuid string
keyHash [][]byte
mail string
archives *Archives
}
// Archives stores the recieved and sent messages, as evidence if needed
......@@ -197,23 +198,23 @@ func (m *SignatureManager) SendReadySign() (signatureUUID string, err error) {
}
// Initialize computes the values needed for the start of the signing
func (m *SignatureManager) Initialize() (uint32, int, int, error) {
func (m *SignatureManager) Initialize() (uint32, int, error) {
myID, err := m.FindID