// WalletToken gets a token from wallet that matches usage.
// The token is reissued for owner if not nil.
// If the token is a subscription-token and owner is not present, it
// is stored and a "NeedReissue" error is returned.
func (c *Client) WalletToken(usage string, owner *[ed25519.PublicKeySize]byte) (tokenHash []byte, err error) {
newToken, params, pubkeyUsed, err := c.getTokenFromWallet(usage)
if err != nil {
return nil, err
}
// Cache token, params
tokenUnmarshalled, err := token.Unmarshal(newToken)
if err != nil {
c.LastError = err
return nil, ErrFatal
}
// Parse pubkeyUsed and add to keypool
signerPubKey, err := new(signkeys.PublicKey).Unmarshal(pubkeyUsed)
if err != nil {
c.LastError = err
return nil, ErrFatal
}
keyid, err := c.packetClient.Keypool.LoadKey(signerPubKey)
if err != nil && err != keypool.ErrExists {
c.LastError = err
return nil, ErrFatal
}
c.packetClient.Keypool.SaveKey(*keyid)
// If we have params this is not renewable
renewable := false
if params == nil || len(params) == 0 {
renewable = true
} else {
// Unless the params state otherwise....
_, _, _, canReissue, err := types.UnmarshalParams(params)
if err != nil {
c.LastError = err
return nil, ErrFatal
}
if canReissue {
renewable = true
}
}
//tokenUnmarshalled.KeyID
ownerPubkey, ownerPrivkey := splitKey(c.walletKey)
// Set tokenentry struct for storage
tokenentry := TokenEntry{
Hash: tokenUnmarshalled.Hash(),
Token: newToken,
Params: params,
OwnerPubKey: ownerPubkey,
OwnerPrivKey: ownerPrivkey,
Renewable: renewable,
CanReissue: true,
Usage: signerPubKey.Usage,
Expire: signerPubKey.Expire,
}
err = c.walletStore.SetToken(tokenentry) // Cache current state
if err != nil {
c.LastError = err
return nil, ErrFatal
}
if owner == nil && renewable == false {
return tokenentry.Hash, ErrNeedReissue
}
// Reissue
return c.ReissueToken(tokenentry.Hash, owner)
}
// Reissue creates a request to be sent to the server to reissue a new token for an old token. oldOwner is the Private key for whoever owned oldToken.
// NewOwner is the public key for whoever is to own the new token. Both can be nil.
func (c Client) Reissue(oldTokenEnc []byte, oldOwner *[ed25519.PrivateKeySize]byte, newOwner *[ed25519.PublicKeySize]byte, params []byte) (toServer []byte, storeLocal *types.ReissuePacketPrivate, err error) {
packet := new(types.ReissuePacket)
packet.CallType = types.CallTypeReissue
oldToken, err := token.Unmarshal(oldTokenEnc)
if err != nil {
return nil, nil, err
}
// Get info from parameters
pubKey, pubParams, _, canReissue, err := types.UnmarshalParams(params)
if err != nil {
return nil, nil, err
}
// Verify that oldToken and params match
oldKeyID := new([signkeys.KeyIDSize]byte)
copy(oldKeyID[:], oldToken.KeyID)
oldPubKey, err := c.Keypool.Lookup(*oldKeyID)
if err != nil {
return nil, nil, err
}
// Verify usage
if oldPubKey.Usage != pubKey.Usage {
return nil, nil, ErrParamMismatch
}
// Verify same service-guard
if oldPubKey.Signer != pubKey.Signer {
return nil, nil, ErrParamMismatch
}
// Add parameter publickey to keypool
saveID, err := c.Keypool.LoadKey(pubKey)
if err != nil && err != keypool.ErrExists {
return nil, nil, err
}
// Save key to permanent storage
if err == nil {
c.Keypool.SaveKey(*saveID)
}
// Create new token data
blindMessage, blindFactors, newToken, err := c.NewToken(pubKey, pubParams, newOwner)
if err != nil {
return nil, nil, err
}
packet.Token, err = oldToken.Marshal()
if err != nil {
return nil, nil, err
}
packet.BlindToken, err = blindMessage.Marshal()
if err != nil {
return nil, nil, err
}
packet.Params = params
_, owner := oldToken.Properties()
if owner != nil {
if oldOwner == nil {
return nil, nil, ErrMissingSigner
}
}
packet.Sign(oldOwner)
rpacket, err := packet.Marshal()
if err != nil {
return nil, nil, err
}
local := new(types.ReissuePacketPrivate)
local.CanReissue = canReissue
local.PublicKey, err = pubKey.Marshal()
if err != nil {
return nil, nil, err
}
local.Factors, err = blindFactors.Marshal()
if err != nil {
return nil, nil, err
}
local.Token, err = newToken.Marshal()
if err != nil {
return nil, nil, err
}
rhash := packet.Hash()
local.RequestHash = rhash[:]
local.Request = rpacket
return rpacket, local, nil
}