func (this *State) ExchangeRateAuthorityIsValid(e interfaces.IEBEntry) bool {
// convert the conf quthority address into a
authorityAddress := base58.Decode(this.ExchangeRateAuthorityAddress)
ecPubPrefix := []byte{0x59, 0x2a}
if !bytes.Equal(authorityAddress[:2], ecPubPrefix) {
fmt.Errorf("Invalid Entry Credit Private Address")
return false
}
pub := new([32]byte)
copy(pub[:], authorityAddress[2:34])
// in case verify can't handle empty public key
if this.ExchangeRateAuthorityAddress == "" {
return false
}
sig := new([64]byte)
externalIds := e.ExternalIDs()
// check for number of ext ids
if len(externalIds) < 1 {
return false
}
copy(sig[:], externalIds[0]) // First ext id needs to be the signature of the content
if !ed.VerifyCanonical(pub, e.GetContent(), sig) {
return false
}
return true
}
func registerIdentityAsServer(entry interfaces.IEBEntry, height uint32, st *State) error {
extIDs := entry.ExternalIDs()
if len(extIDs) == 0 {
return errors.New("Identity Error Register Identity: Invalid external ID length")
}
if bytes.Compare([]byte{0x00}, extIDs[0]) != 0 || // Version
!CheckExternalIDsLength(extIDs, []int{1, 26, 32, 33, 64}) { // Signiture
return errors.New("Identity Error Register Identity: Invalid external ID length")
}
chainID := entry.GetChainID()
IdentityIndex := st.isIdentityChain(chainID)
if IdentityIndex == -1 {
IdentityIndex = st.CreateBlankFactomIdentity(chainID)
}
sigmsg, err := AppendExtIDs(extIDs, 0, 2)
if err != nil {
return err
} else {
// Verify Signature
idKey := st.Identities[IdentityIndex].Key1
if CheckSig(idKey, extIDs[3][1:33], sigmsg, extIDs[4]) {
st.Identities[IdentityIndex].ManagementRegistered = height
st.Identities[IdentityIndex].ManagementChainID = primitives.NewHash(extIDs[2][:32])
} else {
return errors.New("New Management Chain Register for identity [" + chainID.String()[:10] + "] is invalid. Bad signiture")
}
}
return nil
}
// AddEBEntry creates a new Entry Block Entry from the provided Factom Entry
// and adds it to the Entry Block Body.
func (e *EBlock) AddEBEntry(entry interfaces.IEBEntry) error {
e.Body.EBEntries = append(e.Body.EBEntries, entry.GetHash())
if err := e.BuildHeader(); err != nil {
return err
}
return nil
}
func addIdentity(entry interfaces.IEBEntry, height uint32, st *State) error {
extIDs := entry.ExternalIDs()
// This check is here to prevent possible index out of bounds with extIDs[:6]
if len(extIDs) != 7 {
return errors.New("Identity Error Create Management: Invalid external ID length")
}
if bytes.Compare([]byte{0x00}, extIDs[0]) != 0 || // Version
!CheckExternalIDsLength(extIDs[:6], []int{1, 14, 32, 32, 32, 32}) { // Nonce
return errors.New("Identity Error Create Identity Chain: Invalid external ID length")
}
chainID := entry.GetChainID()
IdentityIndex := st.isIdentityChain(chainID)
if IdentityIndex == -1 {
IdentityIndex = st.CreateBlankFactomIdentity(chainID)
}
h := primitives.NewHash(extIDs[2])
st.Identities[IdentityIndex].Key1 = h
h = primitives.NewHash(extIDs[3])
st.Identities[IdentityIndex].Key2 = h
h = primitives.NewHash(extIDs[4])
st.Identities[IdentityIndex].Key3 = h
h = primitives.NewHash(extIDs[5])
st.Identities[IdentityIndex].Key4 = h
st.Identities[IdentityIndex].IdentityCreated = height
return nil
}
func registerFactomIdentity(entry interfaces.IEBEntry, chainID interfaces.IHash, height uint32, st *State) error {
extIDs := entry.ExternalIDs()
if len(extIDs) == 0 {
return errors.New("Identity Error Register Identity: Invalid external ID length")
}
if bytes.Compare([]byte{0x00}, extIDs[0]) != 0 || // Version
!CheckExternalIDsLength(extIDs, []int{1, 24, 32, 33, 64}) { // Signiture
return errors.New("Identity Error Register Identity: Invalid external ID length")
}
// find the Identity index from the chain id in the external id. add this chainID as the management id
idChain := primitives.NewHash(extIDs[2])
IdentityIndex := st.isIdentityChain(idChain)
if IdentityIndex == -1 {
IdentityIndex = st.CreateBlankFactomIdentity(idChain)
}
sigmsg, err := AppendExtIDs(extIDs, 0, 2)
if err != nil {
return err
} else {
// Verify Signature
idKey := st.Identities[IdentityIndex].Key1
if CheckSig(idKey, extIDs[3][1:33], sigmsg, extIDs[4]) {
st.Identities[IdentityIndex].ManagementRegistered = height
} else {
return errors.New("New Management Chain Register for identity [" + chainID.String()[:10] + "] is invalid. Bad signiture")
}
}
st.Identities[IdentityIndex].IdentityRegistered = height
return nil
}
// NewChainID generates a ChainID from an entry. ChainID = primitives.Sha(Sha(ExtIDs[0]) +
// Sha(ExtIDs[1] + ... + Sha(ExtIDs[n]))
func NewChainID(e interfaces.IEBEntry) interfaces.IHash {
id := new(primitives.Hash)
sum := sha256.New()
for _, v := range e.ExternalIDs() {
x := sha256.Sum256(v)
sum.Write(x[:])
}
id.SetBytes(sum.Sum(nil))
return id
}
// InsertEntry inserts an entry
func (db *Overlay) InsertEntry(entry interfaces.IEBEntry) error {
if entry == nil {
return nil
}
//Entries are saved in buckets represented by their chainID for easy batch loading
//They are also indexed in ENTRY bucket by their hash that points to their chainID
//So they can be loaded in two load operations without needing to know their chainID
batch := []interfaces.Record{}
batch = append(batch, interfaces.Record{entry.GetChainID().Bytes(), entry.DatabasePrimaryIndex().Bytes(), entry})
batch = append(batch, interfaces.Record{ENTRY, entry.DatabasePrimaryIndex().Bytes(), entry.GetChainIDHash()})
return db.PutInBatch(batch)
}
// AddEBEntry creates a new Entry Block Entry from the provided Factom Entry
// and adds it to the Entry Block Body.
func (e *EBlock) AddEBEntry(entry interfaces.IEBEntry) error {
e.Body.EBEntries = append(e.Body.EBEntries, entry.GetHash())
return nil
}
func registerAnchorSigningKey(entry interfaces.IEBEntry, initial bool, height uint32, st *State, BlockChain string) error {
extIDs := entry.ExternalIDs()
if bytes.Compare([]byte{0x00}, extIDs[0]) != 0 ||
!CheckExternalIDsLength(extIDs, []int{1, 15, 32, 1, 1, 20, 8, 33, 64}) {
return errors.New("Identity Error Anchor Key: Invalid external ID length")
}
subChainID := entry.GetChainID()
chainID := new(primitives.Hash)
chainID.SetBytes(extIDs[2][:32])
IdentityIndex := st.isIdentityChain(chainID)
if IdentityIndex == -1 {
return errors.New("Identity Error: This cannot happen. New Bitcoin Key to nonexistent identity")
}
if !st.Identities[IdentityIndex].ManagementChainID.IsSameAs(subChainID) {
return errors.New("Identity Error: Entry was not placed in the correct management chain")
}
var ask []AnchorSigningKey
var newAsk []AnchorSigningKey
var oneAsk AnchorSigningKey
ask = st.Identities[IdentityIndex].AnchorKeys
newAsk = make([]AnchorSigningKey, len(ask)+1)
oneAsk.BlockChain = BlockChain
oneAsk.KeyLevel = extIDs[3][0]
oneAsk.KeyType = extIDs[4][0]
oneAsk.SigningKey = extIDs[5]
contains := false
for i := 0; i < len(ask); i++ {
if ask[i].KeyLevel == oneAsk.KeyLevel &&
strings.Compare(ask[i].BlockChain, oneAsk.BlockChain) == 0 {
contains = true
ask[i] = oneAsk
} else {
newAsk[i] = ask[i]
}
}
newAsk[len(ask)] = oneAsk
sigmsg, err := AppendExtIDs(extIDs, 0, 6)
if err != nil {
return err
} else {
// Verify Signature
idKey := st.Identities[IdentityIndex].Key1
if CheckSig(idKey, extIDs[7][1:33], sigmsg, extIDs[8]) {
var key [20]byte
if len(extIDs[5]) != 20 {
return errors.New("New Anchor key for identity [" + chainID.String()[:10] + "] is invalid length")
}
dbase := st.GetAndLockDB()
dblk, err := dbase.FetchDBlockByHeight(height)
st.UnlockDB()
if err == nil && dblk != nil && dblk.GetHeader().GetTimestamp().GetTimeSeconds() != 0 {
if !CheckTimestamp(extIDs[6], dblk.GetHeader().GetTimestamp().GetTimeSeconds()) {
return errors.New("New Anchor key for identity [" + chainID.String()[:10] + "] timestamp is too old")
}
} else {
if !CheckTimestamp(extIDs[6], st.GetTimestamp().GetTimeSeconds()) {
return errors.New("New Anchor key for identity [" + chainID.String()[:10] + "] timestamp is too old")
}
}
if contains {
st.Identities[IdentityIndex].AnchorKeys = ask
} else {
st.Identities[IdentityIndex].AnchorKeys = newAsk
}
// Add to admin block
status := st.Identities[IdentityIndex].Status
if !initial && statusIsFedOrAudit(status) && st.GetLeaderVM() == st.ComputeVMIndex(entry.GetChainID().Bytes()) {
copy(key[:20], extIDs[5][:20])
extIDs[5] = append(extIDs[5], []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}...)
key := primitives.NewHash(extIDs[5])
msg := messages.NewChangeServerKeyMsg(st, chainID, constants.TYPE_ADD_BTC_ANCHOR_KEY, extIDs[3][0], extIDs[4][0], key)
err := msg.(*messages.ChangeServerKeyMsg).Sign(st.serverPrivKey)
if err != nil {
return errors.New("New Block Signing key for identity [" + chainID.String()[:10] + "] Error: cannot sign msg")
}
st.InMsgQueue() <- msg
}
} else {
return errors.New("New Anchor key for identity [" + chainID.String()[:10] + "] is invalid. Bad signiture")
}
}
return nil
}
func updateMatryoshkaHash(entry interfaces.IEBEntry, initial bool, height uint32, st *State) error {
extIDs := entry.ExternalIDs()
if len(extIDs) == 0 {
return errors.New("Identity Error MHash: Invalid external ID length")
}
if bytes.Compare([]byte{0x00}, extIDs[0]) != 0 || // Version
!CheckExternalIDsLength(extIDs, []int{1, 19, 32, 32, 8, 33, 64}) { // Signiture
return errors.New("Identity Error MHash: Invalid external ID length")
}
chainID := new(primitives.Hash)
chainID.SetBytes(extIDs[2][:32])
subChainID := entry.GetChainID()
IdentityIndex := st.isIdentityChain(chainID)
if IdentityIndex == -1 {
return errors.New("Identity Error: This cannot happen. New Matryoshka Hash to nonexistent identity")
}
if !st.Identities[IdentityIndex].ManagementChainID.IsSameAs(subChainID) {
return errors.New("Identity Error: Entry was not placed in the correct management chain")
}
sigmsg, err := AppendExtIDs(extIDs, 0, 4)
if err != nil {
//log.Printfln("Identity Error:", err)
return nil
} else {
// Verify Signature
idKey := st.Identities[IdentityIndex].Key1
if CheckSig(idKey, extIDs[5][1:33], sigmsg, extIDs[6]) {
// Check MHash length
if len(extIDs[3]) != 32 {
return errors.New("New Matryoshka Hash for identity [" + chainID.String()[:10] + "] is invalid length")
}
dbase := st.GetAndLockDB()
dblk, err := dbase.FetchDBlockByHeight(height)
st.UnlockDB()
if err == nil && dblk != nil && dblk.GetHeader().GetTimestamp().GetTimeSeconds() != 0 {
if !CheckTimestamp(extIDs[4], dblk.GetHeader().GetTimestamp().GetTimeSeconds()) {
return errors.New("New Matryoshka Hash for identity [" + chainID.String()[:10] + "] timestamp is too old")
}
} else {
if !CheckTimestamp(extIDs[4], st.GetTimestamp().GetTimeSeconds()) {
return errors.New("New Matryoshka Hash for identity [" + chainID.String()[:10] + "] timestamp is too old")
}
}
mhash := primitives.NewHash(extIDs[3])
st.Identities[IdentityIndex].MatryoshkaHash = mhash
// Add to admin block
status := st.Identities[IdentityIndex].Status
if !initial && statusIsFedOrAudit(status) && st.GetLeaderVM() == st.ComputeVMIndex(entry.GetChainID().Bytes()) {
//if st.LeaderPL.VMIndexFor(constants.ADMIN_CHAINID) == st.GetLeaderVM() {
msg := messages.NewChangeServerKeyMsg(st, chainID, constants.TYPE_ADD_MATRYOSHKA, 0, 0, mhash)
err := msg.(*messages.ChangeServerKeyMsg).Sign(st.serverPrivKey)
if err != nil {
return errors.New("New Block Signing key for identity [" + chainID.String()[:10] + "] Error: cannot sign msg")
}
//log.Printfln("DEBUG: MHash ChangeServer Message Sent")
st.InMsgQueue() <- msg
//}
}
} else {
return errors.New("New Matryoshka Hash for identity [" + chainID.String()[:10] + "] is invalid. Bad signiture")
}
}
return nil
}
func registerBlockSigningKey(entry interfaces.IEBEntry, initial bool, height uint32, st *State) error {
extIDs := entry.ExternalIDs()
if len(extIDs) == 0 {
return errors.New("Identity Error Block Signing Key: Invalid external ID length")
}
if bytes.Compare([]byte{0x00}, extIDs[0]) != 0 || // Version
!CheckExternalIDsLength(extIDs, []int{1, 21, 32, 32, 8, 33, 64}) {
return errors.New("Identity Error Block Signing Key: Invalid external ID length")
}
subChainID := entry.GetChainID()
chainID := new(primitives.Hash)
chainID.SetBytes(extIDs[2][:32])
IdentityIndex := st.isIdentityChain(chainID)
if IdentityIndex == -1 {
return errors.New("Identity Error: This cannot happen. New block signing key to nonexistent identity")
}
if !st.Identities[IdentityIndex].ManagementChainID.IsSameAs(subChainID) {
return errors.New("Identity Error: Entry was not placed in the correct management chain")
}
sigmsg, err := AppendExtIDs(extIDs, 0, 4)
if err != nil {
return err
} else {
//verify Signature
idKey := st.Identities[IdentityIndex].Key1
if CheckSig(idKey, extIDs[5][1:33], sigmsg, extIDs[6]) {
// Check block key length
if len(extIDs[3]) != 32 {
return errors.New("New Block Signing key for identity [" + chainID.String()[:10] + "] is invalid length")
}
dbase := st.GetAndLockDB()
dblk, err := dbase.FetchDBlockByHeight(height)
st.UnlockDB()
if err == nil && dblk != nil && dblk.GetHeader().GetTimestamp().GetTimeSeconds() != 0 {
if !CheckTimestamp(extIDs[4], dblk.GetHeader().GetTimestamp().GetTimeSeconds()) {
return errors.New("New Block Signing key for identity [" + chainID.String()[:10] + "] timestamp is too old")
}
} else {
if !CheckTimestamp(extIDs[4], st.GetTimestamp().GetTimeSeconds()) {
return errors.New("New Block Signing key for identity [" + chainID.String()[:10] + "] timestamp is too old")
}
}
st.Identities[IdentityIndex].SigningKey = primitives.NewHash(extIDs[3])
// Add to admin block
status := st.Identities[IdentityIndex].Status
if !initial && statusIsFedOrAudit(status) && st.GetLeaderVM() == st.ComputeVMIndex(entry.GetChainID().Bytes()) {
key := primitives.NewHash(extIDs[3])
msg := messages.NewChangeServerKeyMsg(st, chainID, constants.TYPE_ADD_FED_SERVER_KEY, 0, 0, key)
err := msg.(*messages.ChangeServerKeyMsg).Sign(st.serverPrivKey)
if err != nil {
return errors.New("New Block Signing key for identity [" + chainID.String()[:10] + "] Error: cannot sign msg")
}
st.InMsgQueue() <- msg
}
} else {
return errors.New("New Block Signing key for identity [" + chainID.String()[:10] + "] is invalid. Bad signiture")
}
}
return nil
}
func LoadIdentityByEntry(ent interfaces.IEBEntry, st *State, height uint32, initial bool) {
if ent == nil {
return
}
hs := ent.GetChainID().String()
cid := ent.GetChainID()
if st.isIdentityChain(cid) == -1 {
if st.isAuthorityChain(cid) != -1 {
// The authority exists, but the Identity does not. This could be an issue if a
// server changes their key as we would not notice the change
}
return
}
if hs[0:60] != "000000000000000000000000000000000000000000000000000000000000" { //ignore minute markers
if len(ent.ExternalIDs()) > 1 {
if string(ent.ExternalIDs()[1]) == "Register Server Management" {
registerIdentityAsServer(ent, height, st)
} else if string(ent.ExternalIDs()[1]) == "New Block Signing Key" {
if len(ent.ExternalIDs()) == 7 {
registerBlockSigningKey(ent, initial, height, st)
}
} else if string(ent.ExternalIDs()[1]) == "New Bitcoin Key" {
if len(ent.ExternalIDs()) == 9 {
registerAnchorSigningKey(ent, initial, height, st, "BTC")
}
} else if string(ent.ExternalIDs()[1]) == "New Matryoshka Hash" {
if len(ent.ExternalIDs()) == 7 {
updateMatryoshkaHash(ent, initial, height, st)
}
} else if len(ent.ExternalIDs()) > 1 && string(ent.ExternalIDs()[1]) == "Identity Chain" {
addIdentity(ent, height, st)
} else if len(ent.ExternalIDs()) > 1 && string(ent.ExternalIDs()[1]) == "Server Management" {
if len(ent.ExternalIDs()) == 4 {
updateManagementKey(ent, height, st)
}
}
}
}
}
