// Domain returns the domain of the uid identity.
func (msg *Message) Domain() string {
_, domain, err := identity.Split(msg.UIDContent.IDENTITY)
if err != nil {
// UID messages have to be valid
panic(log.Critical(err))
}
return domain
}
// Localpart returns the localpart of the uid identity.
func (msg *Message) Localpart() string {
lp, _, err := identity.Split(msg.UIDContent.IDENTITY)
if err != nil {
// UID messages have to be valid
panic(log.Critical(err))
}
return lp
}
// Check that the content of the UID message is consistent with it's version.
func (msg *Message) Check() error {
// we only support version 1.0 at this stage
if msg.UIDContent.VERSION != "1.0" {
return log.Errorf("uid: unknown UIDContent.VERSION: %s",
msg.UIDContent.VERSION)
}
// generic checks
optional := Optional.String()
if msg.UIDContent.PREFERENCES.FORWARDSEC != optional {
if msg.UIDContent.MIXADDRESS != "" {
return log.Errorf("uid: MIXADDRESS must be null, if FORWARDSEC is not %q",
optional)
}
if msg.UIDContent.NYMADDRESS != "" {
return log.Errorf("uid: NYMADDRESS must be null, if FORWARDSEC is not %q",
optional)
}
}
if err := identity.IsMapped(msg.UIDContent.IDENTITY); err != nil {
return log.Error(err)
}
// check SIGKEY
if msg.UIDContent.SIGKEY.CIPHERSUITE != DefaultCiphersuite {
return log.Error("uid: UIDContent.SIGKEY.CIPHERSUITE != DefaultCiphersuite")
}
if msg.UIDContent.SIGKEY.FUNCTION != "ED25519" {
return log.Error("uid: UIDContent.SIGKEY.FUNCTION != \"ED25519\"")
}
// make sure LASTENTRY is parseable for a non-keyserver localpart.
// For keyservers the LASTENTRY can be empty, iff this is the first entry
// in the hashchain.
lp, _, _ := identity.Split(msg.UIDContent.IDENTITY)
if lp != "keyserver" {
_, _, _, _, _, _, err := hashchain.SplitEntry(msg.UIDContent.LASTENTRY)
if err != nil {
return err
}
}
// make sure ESCROWSIGNATURE and USERSIGNATURE are not set at the same time
if msg.ESCROWSIGNATURE != "" && msg.USERSIGNATURE != "" {
return log.Error("uid: USERSIGNATURE and ESCROWSIGNATURE cannot be set at the same time")
}
// version 1.0 specific checks
return msg.checkV1_0()
}
// GetPrivateIdentitiesForDomain returns all private identities for the given
// domain from keyDB.
func (keyDB *KeyDB) GetPrivateIdentitiesForDomain(domain string) ([]string, error) {
var identities []string
all, err := keyDB.GetPrivateIdentities()
if err != nil {
return nil, err
}
dmn := identity.MapDomain(domain)
for _, id := range all {
_, idDomain, err := identity.Split(id)
if err != nil {
return nil, err
}
if idDomain == dmn {
identities = append(identities, id)
}
}
return identities, nil
}
func (msg *Message) checkV1_0() error {
// UIDContent.PREFERENCES.FORWARDSEC must be "strict"
strict := Strict.String()
if msg.UIDContent.PREFERENCES.FORWARDSEC != strict {
return log.Errorf("uid: FORWARDSEC must be %q", strict)
}
// UIDContent.PUBKEYS contains exactly one ECDHE25519 key for the default
// ciphersuite
if len(msg.UIDContent.PUBKEYS) != 1 {
return log.Error("uid: UIDContent.PUBKEYS must contain exactly one key")
}
if msg.UIDContent.PUBKEYS[0].CIPHERSUITE != DefaultCiphersuite {
return log.Error("uid: UIDContent.PUBKEYS[0].CIPHERSUITE != DefaultCiphersuite")
}
if msg.UIDContent.PUBKEYS[0].FUNCTION != "ECDHE25519" {
return log.Error("uid: UIDContent.PUBKEYS[0].FUNCTION != \"ECDHE25519\"")
}
// UIDContent.SIGESCROW must be zero-value.
if msg.UIDContent.SIGESCROW != nil {
if msg.UIDContent.SIGESCROW.CIPHERSUITE != "" ||
msg.UIDContent.SIGESCROW.FUNCTION != "" ||
msg.UIDContent.SIGESCROW.HASH != "" ||
msg.UIDContent.SIGESCROW.PUBKEY != "" {
return log.Error("uid: UIDContent.SIGESCROW must be zero-value")
}
}
// UIDContent.REPOURIS contains one entry which is the domain of
// UIDContent.IDENTITY
_, domain, _ := identity.Split(msg.UIDContent.IDENTITY)
if len(msg.UIDContent.REPOURIS) != 1 ||
msg.UIDContent.REPOURIS[0] != domain {
return log.Error("uid: UIDContent.REPOURIS must contain one entry (domain of identity)")
}
// UIDContent.CHAINLINK must be zero-value
if msg.UIDContent.CHAINLINK != nil {
if !reflect.DeepEqual(msg.UIDContent.CHAINLINK, chainlink{}) {
return log.Error("uid: UIDContent.CHAINLINK must be zero-value")
}
}
return nil
}
// Create creates a new UID message for the given userID and self-signs it.
// It automatically creates all necessary keys. If sigescrow is true, an
// escrow key is included in the created UID message.
// Necessary randomness is read from rand.
func Create(
userID string,
sigescrow bool,
mixaddress, nymaddress string,
pfsPreference PFSPreference,
lastEntry string,
rand io.Reader,
) (*Message, error) {
var msg Message
var err error
// check user ID (identity)
if err := identity.IsMapped(userID); err != nil {
return nil, log.Error(err)
}
msg.UIDContent.VERSION = ProtocolVersion
msg.UIDContent.MSGCOUNT = 0 // this is the first UIDMessage
msg.UIDContent.NOTAFTER = uint64(times.OneYearLater()) // TODO: make this settable!
msg.UIDContent.NOTBEFORE = 0 // TODO: make this settable
if pfsPreference == Optional {
msg.UIDContent.MIXADDRESS = mixaddress
msg.UIDContent.NYMADDRESS = nymaddress
} else {
msg.UIDContent.MIXADDRESS = ""
msg.UIDContent.NYMADDRESS = ""
}
msg.UIDContent.IDENTITY = userID
if err = msg.UIDContent.SIGKEY.initSigKey(rand); err != nil {
return nil, err
}
msg.UIDContent.PUBKEYS = make([]KeyEntry, 1)
if err := msg.UIDContent.PUBKEYS[0].InitDHKey(rand); err != nil {
return nil, err
}
if sigescrow {
msg.UIDContent.SIGESCROW = new(KeyEntry)
if err = msg.UIDContent.SIGESCROW.initSigKey(rand); err != nil {
return nil, err
}
}
// make sure LASTENTRY is parseable for a non-keyserver localpart.
// For keyservers the LASTENTRY can be empty, iff this is the first entry
// in the hashchain.
lp, domain, _ := identity.Split(msg.UIDContent.IDENTITY)
if lp != "keyserver" {
if _, _, _, _, _, _, err := hashchain.SplitEntry(lastEntry); err != nil {
return nil, err
}
}
msg.UIDContent.LASTENTRY = lastEntry
// set REPOURIS to the domain of UIDContent.IDENTITY
// TODO: support different KeyInit repository configurations
msg.UIDContent.REPOURIS = []string{domain}
msg.UIDContent.PREFERENCES.FORWARDSEC = pfsPreference.String()
msg.UIDContent.PREFERENCES.CIPHERSUITES = []string{DefaultCiphersuite}
// TODO: CHAINLINK (later protocol version)
// theses signatures are always empty for messages the first UIDMessage
msg.ESCROWSIGNATURE = ""
msg.USERSIGNATURE = ""
selfsig := msg.UIDContent.SIGKEY.ed25519Key.Sign(msg.UIDContent.JSON())
msg.SELFSIGNATURE = base64.Encode(selfsig)
// TODO: LINKAUTHORITY
return &msg, nil
}
func (ce *CtrlEngine) msgSend(
c *cli.Context,
id string,
all bool,
failDelivery bool,
) error {
nyms, err := ce.getNyms(id, all)
if err != nil {
return err
}
for _, nym := range nyms {
// clear resend status for old messages in outqueue
if err := ce.msgDB.ClearResendOutQueue(nym); err != nil {
return err
}
// process old messages in outqueue
if err := ce.procOutQueue(c, nym, failDelivery); err != nil {
return err
}
/*
ids, err := ce.msgDB.GetMsgIDs(nym)
if err != nil {
return err
}
for _, id := range ids {
log.Debugf("id=%d, to=%s", id.MsgID, id.To)
}
*/
// add all undelivered messages to outqueue
var recvNymAddress string
for {
msgID, peer, msg, sign, minDelay, maxDelay, err :=
ce.msgDB.GetUndeliveredMessage(nym)
if err != nil {
return err
}
if peer == "" {
log.Debug("break")
break // no more undelivered messages
}
// determine recipient nymaddress for encryption, if necessary
if recvNymAddress == "" {
// TODO! (implement more accounts? delay settings?)
privkey, server, secret, minDelay, maxDelay, _, err :=
ce.msgDB.GetAccount(nym, "")
if err != nil {
return err
}
_, domain, err := identity.Split(nym)
if err != nil {
return err
}
expire := times.ThirtyDaysLater() // TODO: make this settable
singleUse := false // TODO correct?
var pubkey [ed25519.PublicKeySize]byte
copy(pubkey[:], privkey[32:])
_, recvNymAddress, err = util.NewNymAddress(domain, secret[:],
expire, singleUse, minDelay, maxDelay, nym, &pubkey, server,
def.CACert)
if err != nil {
return err
}
}
// encrypt
enc, nymaddress, err := mutecryptEncrypt(c, nym, peer,
ce.passphrase, msg, sign, recvNymAddress)
if err != nil {
return log.Error(err)
}
// add to outqueue
log.Debug("add")
err = ce.msgDB.AddOutQueue(nym, msgID, enc, nymaddress,
minDelay, maxDelay)
if err != nil {
return log.Error(err)
}
}
// process new messages in outqueue
if err := ce.procOutQueue(c, nym, failDelivery); err != nil {
return err
}
}
return nil
}