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1005 lines
30 KiB
Go
1005 lines
30 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package core
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"math/big"
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"mime"
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"reflect"
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"regexp"
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"sort"
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"strconv"
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"strings"
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"unicode"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/accounts/abi"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/consensus/clique"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/rlp"
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)
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type SigFormat struct {
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Mime string
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ByteVersion byte
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}
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var (
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IntendedValidator = SigFormat{
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accounts.MimetypeDataWithValidator,
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0x00,
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}
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DataTyped = SigFormat{
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accounts.MimetypeTypedData,
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0x01,
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}
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ApplicationClique = SigFormat{
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accounts.MimetypeClique,
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0x02,
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}
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TextPlain = SigFormat{
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accounts.MimetypeTextPlain,
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0x45,
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}
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)
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type ValidatorData struct {
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Address common.Address
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Message hexutil.Bytes
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}
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type TypedData struct {
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Types Types `json:"types"`
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PrimaryType string `json:"primaryType"`
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Domain TypedDataDomain `json:"domain"`
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Message TypedDataMessage `json:"message"`
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}
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type Type struct {
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Name string `json:"name"`
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Type string `json:"type"`
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}
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func (t *Type) isArray() bool {
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return strings.HasSuffix(t.Type, "[]")
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}
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// typeName returns the canonical name of the type. If the type is 'Person[]', then
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// this method returns 'Person'
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func (t *Type) typeName() string {
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if strings.HasSuffix(t.Type, "[]") {
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return strings.TrimSuffix(t.Type, "[]")
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}
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return t.Type
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}
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func (t *Type) isReferenceType() bool {
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if len(t.Type) == 0 {
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return false
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}
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// Reference types must have a leading uppercase characer
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return unicode.IsUpper([]rune(t.Type)[0])
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}
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type Types map[string][]Type
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type TypePriority struct {
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Type string
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Value uint
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}
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type TypedDataMessage = map[string]interface{}
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type TypedDataDomain struct {
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Name string `json:"name"`
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Version string `json:"version"`
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ChainId *math.HexOrDecimal256 `json:"chainId"`
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VerifyingContract string `json:"verifyingContract"`
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Salt string `json:"salt"`
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}
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var typedDataReferenceTypeRegexp = regexp.MustCompile(`^[A-Z](\w*)(\[\])?$`)
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// sign receives a request and produces a signature
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//
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// Note, the produced signature conforms to the secp256k1 curve R, S and V values,
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// where the V value will be 27 or 28 for legacy reasons, if legacyV==true.
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func (api *SignerAPI) sign(addr common.MixedcaseAddress, req *SignDataRequest, legacyV bool) (hexutil.Bytes, error) {
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// We make the request prior to looking up if we actually have the account, to prevent
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// account-enumeration via the API
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res, err := api.UI.ApproveSignData(req)
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if err != nil {
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return nil, err
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}
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if !res.Approved {
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return nil, ErrRequestDenied
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}
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// Look up the wallet containing the requested signer
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account := accounts.Account{Address: addr.Address()}
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wallet, err := api.am.Find(account)
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if err != nil {
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return nil, err
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}
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pw, err := api.lookupOrQueryPassword(account.Address,
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"Password for signing",
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fmt.Sprintf("Please enter password for signing data with account %s", account.Address.Hex()))
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if err != nil {
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return nil, err
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}
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// Sign the data with the wallet
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signature, err := wallet.SignDataWithPassphrase(account, pw, req.ContentType, req.Rawdata)
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if err != nil {
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return nil, err
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}
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if legacyV {
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signature[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper
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}
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return signature, nil
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}
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// SignData signs the hash of the provided data, but does so differently
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// depending on the content-type specified.
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//
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// Different types of validation occur.
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func (api *SignerAPI) SignData(ctx context.Context, contentType string, addr common.MixedcaseAddress, data interface{}) (hexutil.Bytes, error) {
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var req, transformV, err = api.determineSignatureFormat(ctx, contentType, addr, data)
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if err != nil {
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return nil, err
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}
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signature, err := api.sign(addr, req, transformV)
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if err != nil {
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api.UI.ShowError(err.Error())
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return nil, err
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}
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return signature, nil
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}
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// determineSignatureFormat determines which signature method should be used based upon the mime type
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// In the cases where it matters ensure that the charset is handled. The charset
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// resides in the 'params' returned as the second returnvalue from mime.ParseMediaType
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// charset, ok := params["charset"]
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// As it is now, we accept any charset and just treat it as 'raw'.
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// This method returns the mimetype for signing along with the request
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func (api *SignerAPI) determineSignatureFormat(ctx context.Context, contentType string, addr common.MixedcaseAddress, data interface{}) (*SignDataRequest, bool, error) {
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var (
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req *SignDataRequest
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useEthereumV = true // Default to use V = 27 or 28, the legacy Ethereum format
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)
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mediaType, _, err := mime.ParseMediaType(contentType)
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if err != nil {
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return nil, useEthereumV, err
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}
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switch mediaType {
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case IntendedValidator.Mime:
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// Data with an intended validator
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validatorData, err := UnmarshalValidatorData(data)
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if err != nil {
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return nil, useEthereumV, err
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}
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sighash, msg := SignTextValidator(validatorData)
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messages := []*NameValueType{
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{
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Name: "This is a request to sign data intended for a particular validator (see EIP 191 version 0)",
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Typ: "description",
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Value: "",
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},
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{
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Name: "Intended validator address",
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Typ: "address",
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Value: validatorData.Address.String(),
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},
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{
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Name: "Application-specific data",
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Typ: "hexdata",
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Value: validatorData.Message,
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},
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{
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Name: "Full message for signing",
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Typ: "hexdata",
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Value: fmt.Sprintf("0x%x", msg),
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},
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}
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req = &SignDataRequest{ContentType: mediaType, Rawdata: []byte(msg), Messages: messages, Hash: sighash}
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case ApplicationClique.Mime:
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// Clique is the Ethereum PoA standard
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stringData, ok := data.(string)
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if !ok {
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return nil, useEthereumV, fmt.Errorf("input for %v must be an hex-encoded string", ApplicationClique.Mime)
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}
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cliqueData, err := hexutil.Decode(stringData)
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if err != nil {
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return nil, useEthereumV, err
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}
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header := &types.Header{}
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if err := rlp.DecodeBytes(cliqueData, header); err != nil {
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return nil, useEthereumV, err
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}
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// The incoming clique header is already truncated, sent to us with a extradata already shortened
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if len(header.Extra) < 65 {
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// Need to add it back, to get a suitable length for hashing
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newExtra := make([]byte, len(header.Extra)+65)
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copy(newExtra, header.Extra)
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header.Extra = newExtra
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}
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// Get back the rlp data, encoded by us
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sighash, cliqueRlp, err := cliqueHeaderHashAndRlp(header)
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if err != nil {
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return nil, useEthereumV, err
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}
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messages := []*NameValueType{
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{
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Name: "Clique header",
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Typ: "clique",
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Value: fmt.Sprintf("clique header %d [0x%x]", header.Number, header.Hash()),
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},
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}
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// Clique uses V on the form 0 or 1
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useEthereumV = false
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req = &SignDataRequest{ContentType: mediaType, Rawdata: cliqueRlp, Messages: messages, Hash: sighash}
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default: // also case TextPlain.Mime:
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// Calculates an Ethereum ECDSA signature for:
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// hash = keccak256("\x19${byteVersion}Ethereum Signed Message:\n${message length}${message}")
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// We expect it to be a string
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if stringData, ok := data.(string); !ok {
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return nil, useEthereumV, fmt.Errorf("input for text/plain must be an hex-encoded string")
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} else {
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if textData, err := hexutil.Decode(stringData); err != nil {
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return nil, useEthereumV, err
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} else {
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sighash, msg := accounts.TextAndHash(textData)
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messages := []*NameValueType{
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{
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Name: "message",
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Typ: accounts.MimetypeTextPlain,
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Value: msg,
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},
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}
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req = &SignDataRequest{ContentType: mediaType, Rawdata: []byte(msg), Messages: messages, Hash: sighash}
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}
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}
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}
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req.Address = addr
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req.Meta = MetadataFromContext(ctx)
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return req, useEthereumV, nil
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}
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// SignTextWithValidator signs the given message which can be further recovered
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// with the given validator.
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// hash = keccak256("\x19\x00"${address}${data}).
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func SignTextValidator(validatorData ValidatorData) (hexutil.Bytes, string) {
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msg := fmt.Sprintf("\x19\x00%s%s", string(validatorData.Address.Bytes()), string(validatorData.Message))
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return crypto.Keccak256([]byte(msg)), msg
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}
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// cliqueHeaderHashAndRlp returns the hash which is used as input for the proof-of-authority
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// signing. It is the hash of the entire header apart from the 65 byte signature
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// contained at the end of the extra data.
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//
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// The method requires the extra data to be at least 65 bytes -- the original implementation
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// in clique.go panics if this is the case, thus it's been reimplemented here to avoid the panic
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// and simply return an error instead
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func cliqueHeaderHashAndRlp(header *types.Header) (hash, rlp []byte, err error) {
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if len(header.Extra) < 65 {
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err = fmt.Errorf("clique header extradata too short, %d < 65", len(header.Extra))
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return
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}
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rlp = clique.CliqueRLP(header)
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hash = clique.SealHash(header).Bytes()
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return hash, rlp, err
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}
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// SignTypedData signs EIP-712 conformant typed data
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// hash = keccak256("\x19${byteVersion}${domainSeparator}${hashStruct(message)}")
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func (api *SignerAPI) SignTypedData(ctx context.Context, addr common.MixedcaseAddress, typedData TypedData) (hexutil.Bytes, error) {
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domainSeparator, err := typedData.HashStruct("EIP712Domain", typedData.Domain.Map())
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if err != nil {
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return nil, err
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}
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typedDataHash, err := typedData.HashStruct(typedData.PrimaryType, typedData.Message)
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if err != nil {
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return nil, err
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}
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rawData := []byte(fmt.Sprintf("\x19\x01%s%s", string(domainSeparator), string(typedDataHash)))
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sighash := crypto.Keccak256(rawData)
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messages, err := typedData.Format()
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if err != nil {
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return nil, err
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}
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req := &SignDataRequest{ContentType: DataTyped.Mime, Rawdata: rawData, Messages: messages, Hash: sighash}
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signature, err := api.sign(addr, req, true)
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if err != nil {
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api.UI.ShowError(err.Error())
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return nil, err
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}
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return signature, nil
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}
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// HashStruct generates a keccak256 hash of the encoding of the provided data
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func (typedData *TypedData) HashStruct(primaryType string, data TypedDataMessage) (hexutil.Bytes, error) {
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encodedData, err := typedData.EncodeData(primaryType, data, 1)
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if err != nil {
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return nil, err
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}
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return crypto.Keccak256(encodedData), nil
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}
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// Dependencies returns an array of custom types ordered by their hierarchical reference tree
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func (typedData *TypedData) Dependencies(primaryType string, found []string) []string {
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includes := func(arr []string, str string) bool {
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for _, obj := range arr {
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if obj == str {
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return true
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}
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}
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return false
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}
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if includes(found, primaryType) {
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return found
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}
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if typedData.Types[primaryType] == nil {
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return found
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}
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found = append(found, primaryType)
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for _, field := range typedData.Types[primaryType] {
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for _, dep := range typedData.Dependencies(field.Type, found) {
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if !includes(found, dep) {
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found = append(found, dep)
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}
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}
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}
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return found
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}
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// EncodeType generates the following encoding:
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// `name ‖ "(" ‖ member₁ ‖ "," ‖ member₂ ‖ "," ‖ … ‖ memberₙ ")"`
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//
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// each member is written as `type ‖ " " ‖ name` encodings cascade down and are sorted by name
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func (typedData *TypedData) EncodeType(primaryType string) hexutil.Bytes {
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// Get dependencies primary first, then alphabetical
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deps := typedData.Dependencies(primaryType, []string{})
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if len(deps) > 0 {
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slicedDeps := deps[1:]
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sort.Strings(slicedDeps)
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deps = append([]string{primaryType}, slicedDeps...)
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}
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// Format as a string with fields
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var buffer bytes.Buffer
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for _, dep := range deps {
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buffer.WriteString(dep)
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buffer.WriteString("(")
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for _, obj := range typedData.Types[dep] {
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buffer.WriteString(obj.Type)
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buffer.WriteString(" ")
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buffer.WriteString(obj.Name)
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buffer.WriteString(",")
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}
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buffer.Truncate(buffer.Len() - 1)
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buffer.WriteString(")")
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}
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return buffer.Bytes()
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}
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// TypeHash creates the keccak256 hash of the data
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func (typedData *TypedData) TypeHash(primaryType string) hexutil.Bytes {
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return crypto.Keccak256(typedData.EncodeType(primaryType))
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}
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// EncodeData generates the following encoding:
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// `enc(value₁) ‖ enc(value₂) ‖ … ‖ enc(valueₙ)`
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//
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// each encoded member is 32-byte long
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func (typedData *TypedData) EncodeData(primaryType string, data map[string]interface{}, depth int) (hexutil.Bytes, error) {
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if err := typedData.validate(); err != nil {
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return nil, err
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}
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buffer := bytes.Buffer{}
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// Verify extra data
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if len(typedData.Types[primaryType]) < len(data) {
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return nil, errors.New("there is extra data provided in the message")
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}
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// Add typehash
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buffer.Write(typedData.TypeHash(primaryType))
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// Add field contents. Structs and arrays have special handlers.
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for _, field := range typedData.Types[primaryType] {
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encType := field.Type
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encValue := data[field.Name]
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if encType[len(encType)-1:] == "]" {
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arrayValue, ok := encValue.([]interface{})
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if !ok {
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return nil, dataMismatchError(encType, encValue)
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}
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arrayBuffer := bytes.Buffer{}
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parsedType := strings.Split(encType, "[")[0]
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for _, item := range arrayValue {
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if typedData.Types[parsedType] != nil {
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mapValue, ok := item.(map[string]interface{})
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if !ok {
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return nil, dataMismatchError(parsedType, item)
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}
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encodedData, err := typedData.EncodeData(parsedType, mapValue, depth+1)
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if err != nil {
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return nil, err
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}
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arrayBuffer.Write(encodedData)
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} else {
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bytesValue, err := typedData.EncodePrimitiveValue(parsedType, item, depth)
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if err != nil {
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return nil, err
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}
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arrayBuffer.Write(bytesValue)
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}
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}
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buffer.Write(crypto.Keccak256(arrayBuffer.Bytes()))
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} else if typedData.Types[field.Type] != nil {
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mapValue, ok := encValue.(map[string]interface{})
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if !ok {
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return nil, dataMismatchError(encType, encValue)
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}
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encodedData, err := typedData.EncodeData(field.Type, mapValue, depth+1)
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if err != nil {
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return nil, err
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}
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buffer.Write(crypto.Keccak256(encodedData))
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} else {
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byteValue, err := typedData.EncodePrimitiveValue(encType, encValue, depth)
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if err != nil {
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return nil, err
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}
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buffer.Write(byteValue)
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}
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}
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return buffer.Bytes(), nil
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}
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func parseInteger(encType string, encValue interface{}) (*big.Int, error) {
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var (
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length int
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signed = strings.HasPrefix(encType, "int")
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b *big.Int
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)
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if encType == "int" || encType == "uint" {
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length = 256
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} else {
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lengthStr := ""
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if strings.HasPrefix(encType, "uint") {
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lengthStr = strings.TrimPrefix(encType, "uint")
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} else {
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lengthStr = strings.TrimPrefix(encType, "int")
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}
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atoiSize, err := strconv.Atoi(lengthStr)
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if err != nil {
|
|
return nil, fmt.Errorf("invalid size on integer: %v", lengthStr)
|
|
}
|
|
length = atoiSize
|
|
}
|
|
switch v := encValue.(type) {
|
|
case *math.HexOrDecimal256:
|
|
b = (*big.Int)(v)
|
|
case string:
|
|
var hexIntValue math.HexOrDecimal256
|
|
if err := hexIntValue.UnmarshalText([]byte(v)); err != nil {
|
|
return nil, err
|
|
}
|
|
b = (*big.Int)(&hexIntValue)
|
|
case float64:
|
|
// JSON parses non-strings as float64. Fail if we cannot
|
|
// convert it losslessly
|
|
if float64(int64(v)) == v {
|
|
b = big.NewInt(int64(v))
|
|
} else {
|
|
return nil, fmt.Errorf("invalid float value %v for type %v", v, encType)
|
|
}
|
|
}
|
|
if b == nil {
|
|
return nil, fmt.Errorf("invalid integer value %v/%v for type %v", encValue, reflect.TypeOf(encValue), encType)
|
|
}
|
|
if b.BitLen() > length {
|
|
return nil, fmt.Errorf("integer larger than '%v'", encType)
|
|
}
|
|
if !signed && b.Sign() == -1 {
|
|
return nil, fmt.Errorf("invalid negative value for unsigned type %v", encType)
|
|
}
|
|
return b, nil
|
|
}
|
|
|
|
// EncodePrimitiveValue deals with the primitive values found
|
|
// while searching through the typed data
|
|
func (typedData *TypedData) EncodePrimitiveValue(encType string, encValue interface{}, depth int) ([]byte, error) {
|
|
switch encType {
|
|
case "address":
|
|
stringValue, ok := encValue.(string)
|
|
if !ok || !common.IsHexAddress(stringValue) {
|
|
return nil, dataMismatchError(encType, encValue)
|
|
}
|
|
retval := make([]byte, 32)
|
|
copy(retval[12:], common.HexToAddress(stringValue).Bytes())
|
|
return retval, nil
|
|
case "bool":
|
|
boolValue, ok := encValue.(bool)
|
|
if !ok {
|
|
return nil, dataMismatchError(encType, encValue)
|
|
}
|
|
if boolValue {
|
|
return math.PaddedBigBytes(common.Big1, 32), nil
|
|
}
|
|
return math.PaddedBigBytes(common.Big0, 32), nil
|
|
case "string":
|
|
strVal, ok := encValue.(string)
|
|
if !ok {
|
|
return nil, dataMismatchError(encType, encValue)
|
|
}
|
|
return crypto.Keccak256([]byte(strVal)), nil
|
|
case "bytes":
|
|
bytesValue, ok := encValue.([]byte)
|
|
if !ok {
|
|
return nil, dataMismatchError(encType, encValue)
|
|
}
|
|
return crypto.Keccak256(bytesValue), nil
|
|
}
|
|
if strings.HasPrefix(encType, "bytes") {
|
|
lengthStr := strings.TrimPrefix(encType, "bytes")
|
|
length, err := strconv.Atoi(lengthStr)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid size on bytes: %v", lengthStr)
|
|
}
|
|
if length < 0 || length > 32 {
|
|
return nil, fmt.Errorf("invalid size on bytes: %d", length)
|
|
}
|
|
if byteValue, ok := encValue.(hexutil.Bytes); !ok {
|
|
return nil, dataMismatchError(encType, encValue)
|
|
} else {
|
|
return math.PaddedBigBytes(new(big.Int).SetBytes(byteValue), 32), nil
|
|
}
|
|
}
|
|
if strings.HasPrefix(encType, "int") || strings.HasPrefix(encType, "uint") {
|
|
b, err := parseInteger(encType, encValue)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return abi.U256(b), nil
|
|
}
|
|
return nil, fmt.Errorf("unrecognized type '%s'", encType)
|
|
|
|
}
|
|
|
|
// dataMismatchError generates an error for a mismatch between
|
|
// the provided type and data
|
|
func dataMismatchError(encType string, encValue interface{}) error {
|
|
return fmt.Errorf("provided data '%v' doesn't match type '%s'", encValue, encType)
|
|
}
|
|
|
|
// EcRecover recovers the address associated with the given sig.
|
|
// Only compatible with `text/plain`
|
|
func (api *SignerAPI) EcRecover(ctx context.Context, data hexutil.Bytes, sig hexutil.Bytes) (common.Address, error) {
|
|
// Returns the address for the Account that was used to create the signature.
|
|
//
|
|
// Note, this function is compatible with eth_sign and personal_sign. As such it recovers
|
|
// the address of:
|
|
// hash = keccak256("\x19${byteVersion}Ethereum Signed Message:\n${message length}${message}")
|
|
// addr = ecrecover(hash, signature)
|
|
//
|
|
// Note, the signature must conform to the secp256k1 curve R, S and V values, where
|
|
// the V value must be be 27 or 28 for legacy reasons.
|
|
//
|
|
// https://github.com/ethereum/go-ethereum/wiki/Management-APIs#personal_ecRecover
|
|
if len(sig) != 65 {
|
|
return common.Address{}, fmt.Errorf("signature must be 65 bytes long")
|
|
}
|
|
if sig[64] != 27 && sig[64] != 28 {
|
|
return common.Address{}, fmt.Errorf("invalid Ethereum signature (V is not 27 or 28)")
|
|
}
|
|
sig[64] -= 27 // Transform yellow paper V from 27/28 to 0/1
|
|
hash := accounts.TextHash(data)
|
|
rpk, err := crypto.SigToPub(hash, sig)
|
|
if err != nil {
|
|
return common.Address{}, err
|
|
}
|
|
return crypto.PubkeyToAddress(*rpk), nil
|
|
}
|
|
|
|
// UnmarshalValidatorData converts the bytes input to typed data
|
|
func UnmarshalValidatorData(data interface{}) (ValidatorData, error) {
|
|
raw, ok := data.(map[string]interface{})
|
|
if !ok {
|
|
return ValidatorData{}, errors.New("validator input is not a map[string]interface{}")
|
|
}
|
|
addr, ok := raw["address"].(string)
|
|
if !ok {
|
|
return ValidatorData{}, errors.New("validator address is not sent as a string")
|
|
}
|
|
addrBytes, err := hexutil.Decode(addr)
|
|
if err != nil {
|
|
return ValidatorData{}, err
|
|
}
|
|
if !ok || len(addrBytes) == 0 {
|
|
return ValidatorData{}, errors.New("validator address is undefined")
|
|
}
|
|
|
|
message, ok := raw["message"].(string)
|
|
if !ok {
|
|
return ValidatorData{}, errors.New("message is not sent as a string")
|
|
}
|
|
messageBytes, err := hexutil.Decode(message)
|
|
if err != nil {
|
|
return ValidatorData{}, err
|
|
}
|
|
if !ok || len(messageBytes) == 0 {
|
|
return ValidatorData{}, errors.New("message is undefined")
|
|
}
|
|
|
|
return ValidatorData{
|
|
Address: common.BytesToAddress(addrBytes),
|
|
Message: messageBytes,
|
|
}, nil
|
|
}
|
|
|
|
// validate makes sure the types are sound
|
|
func (typedData *TypedData) validate() error {
|
|
if err := typedData.Types.validate(); err != nil {
|
|
return err
|
|
}
|
|
if err := typedData.Domain.validate(); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Map generates a map version of the typed data
|
|
func (typedData *TypedData) Map() map[string]interface{} {
|
|
dataMap := map[string]interface{}{
|
|
"types": typedData.Types,
|
|
"domain": typedData.Domain.Map(),
|
|
"primaryType": typedData.PrimaryType,
|
|
"message": typedData.Message,
|
|
}
|
|
return dataMap
|
|
}
|
|
|
|
// Format returns a representation of typedData, which can be easily displayed by a user-interface
|
|
// without in-depth knowledge about 712 rules
|
|
func (typedData *TypedData) Format() ([]*NameValueType, error) {
|
|
domain, err := typedData.formatData("EIP712Domain", typedData.Domain.Map())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ptype, err := typedData.formatData(typedData.PrimaryType, typedData.Message)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var nvts []*NameValueType
|
|
nvts = append(nvts, &NameValueType{
|
|
Name: "EIP712Domain",
|
|
Value: domain,
|
|
Typ: "domain",
|
|
})
|
|
nvts = append(nvts, &NameValueType{
|
|
Name: typedData.PrimaryType,
|
|
Value: ptype,
|
|
Typ: "primary type",
|
|
})
|
|
return nvts, nil
|
|
}
|
|
|
|
func (typedData *TypedData) formatData(primaryType string, data map[string]interface{}) ([]*NameValueType, error) {
|
|
var output []*NameValueType
|
|
|
|
// Add field contents. Structs and arrays have special handlers.
|
|
for _, field := range typedData.Types[primaryType] {
|
|
encName := field.Name
|
|
encValue := data[encName]
|
|
item := &NameValueType{
|
|
Name: encName,
|
|
Typ: field.Type,
|
|
}
|
|
if field.isArray() {
|
|
arrayValue, _ := encValue.([]interface{})
|
|
parsedType := field.typeName()
|
|
for _, v := range arrayValue {
|
|
if typedData.Types[parsedType] != nil {
|
|
mapValue, _ := v.(map[string]interface{})
|
|
mapOutput, err := typedData.formatData(parsedType, mapValue)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
item.Value = mapOutput
|
|
} else {
|
|
primitiveOutput, err := formatPrimitiveValue(field.Type, encValue)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
item.Value = primitiveOutput
|
|
}
|
|
}
|
|
} else if typedData.Types[field.Type] != nil {
|
|
if mapValue, ok := encValue.(map[string]interface{}); ok {
|
|
mapOutput, err := typedData.formatData(field.Type, mapValue)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
item.Value = mapOutput
|
|
} else {
|
|
item.Value = "<nil>"
|
|
}
|
|
} else {
|
|
primitiveOutput, err := formatPrimitiveValue(field.Type, encValue)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
item.Value = primitiveOutput
|
|
}
|
|
output = append(output, item)
|
|
}
|
|
return output, nil
|
|
}
|
|
|
|
func formatPrimitiveValue(encType string, encValue interface{}) (string, error) {
|
|
switch encType {
|
|
case "address":
|
|
if stringValue, ok := encValue.(string); !ok {
|
|
return "", fmt.Errorf("could not format value %v as address", encValue)
|
|
} else {
|
|
return common.HexToAddress(stringValue).String(), nil
|
|
}
|
|
case "bool":
|
|
if boolValue, ok := encValue.(bool); !ok {
|
|
return "", fmt.Errorf("could not format value %v as bool", encValue)
|
|
} else {
|
|
return fmt.Sprintf("%t", boolValue), nil
|
|
}
|
|
case "bytes", "string":
|
|
return fmt.Sprintf("%s", encValue), nil
|
|
}
|
|
if strings.HasPrefix(encType, "bytes") {
|
|
return fmt.Sprintf("%s", encValue), nil
|
|
|
|
}
|
|
if strings.HasPrefix(encType, "uint") || strings.HasPrefix(encType, "int") {
|
|
if b, err := parseInteger(encType, encValue); err != nil {
|
|
return "", err
|
|
} else {
|
|
return fmt.Sprintf("%d (0x%x)", b, b), nil
|
|
}
|
|
}
|
|
return "", fmt.Errorf("unhandled type %v", encType)
|
|
}
|
|
|
|
// NameValueType is a very simple struct with Name, Value and Type. It's meant for simple
|
|
// json structures used to communicate signing-info about typed data with the UI
|
|
type NameValueType struct {
|
|
Name string `json:"name"`
|
|
Value interface{} `json:"value"`
|
|
Typ string `json:"type"`
|
|
}
|
|
|
|
// Pprint returns a pretty-printed version of nvt
|
|
func (nvt *NameValueType) Pprint(depth int) string {
|
|
output := bytes.Buffer{}
|
|
output.WriteString(strings.Repeat("\u00a0", depth*2))
|
|
output.WriteString(fmt.Sprintf("%s [%s]: ", nvt.Name, nvt.Typ))
|
|
if nvts, ok := nvt.Value.([]*NameValueType); ok {
|
|
output.WriteString("\n")
|
|
for _, next := range nvts {
|
|
sublevel := next.Pprint(depth + 1)
|
|
output.WriteString(sublevel)
|
|
}
|
|
} else {
|
|
output.WriteString(fmt.Sprintf("%q\n", nvt.Value))
|
|
}
|
|
return output.String()
|
|
}
|
|
|
|
// Validate checks if the types object is conformant to the specs
|
|
func (t Types) validate() error {
|
|
for typeKey, typeArr := range t {
|
|
if len(typeKey) == 0 {
|
|
return fmt.Errorf("empty type key")
|
|
}
|
|
for i, typeObj := range typeArr {
|
|
if len(typeObj.Type) == 0 {
|
|
return fmt.Errorf("type %v:%d: empty Type", typeKey, i)
|
|
}
|
|
if len(typeObj.Name) == 0 {
|
|
return fmt.Errorf("type %v:%d: empty Name", typeKey, i)
|
|
}
|
|
if typeKey == typeObj.Type {
|
|
return fmt.Errorf("type '%s' cannot reference itself", typeObj.Type)
|
|
}
|
|
if typeObj.isReferenceType() {
|
|
if _, exist := t[typeObj.typeName()]; !exist {
|
|
return fmt.Errorf("reference type '%s' is undefined", typeObj.Type)
|
|
}
|
|
if !typedDataReferenceTypeRegexp.MatchString(typeObj.Type) {
|
|
return fmt.Errorf("unknown reference type '%s", typeObj.Type)
|
|
}
|
|
} else if !isPrimitiveTypeValid(typeObj.Type) {
|
|
return fmt.Errorf("unknown type '%s'", typeObj.Type)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Checks if the primitive value is valid
|
|
func isPrimitiveTypeValid(primitiveType string) bool {
|
|
if primitiveType == "address" ||
|
|
primitiveType == "address[]" ||
|
|
primitiveType == "bool" ||
|
|
primitiveType == "bool[]" ||
|
|
primitiveType == "string" ||
|
|
primitiveType == "string[]" {
|
|
return true
|
|
}
|
|
if primitiveType == "bytes" ||
|
|
primitiveType == "bytes[]" ||
|
|
primitiveType == "bytes1" ||
|
|
primitiveType == "bytes1[]" ||
|
|
primitiveType == "bytes2" ||
|
|
primitiveType == "bytes2[]" ||
|
|
primitiveType == "bytes3" ||
|
|
primitiveType == "bytes3[]" ||
|
|
primitiveType == "bytes4" ||
|
|
primitiveType == "bytes4[]" ||
|
|
primitiveType == "bytes5" ||
|
|
primitiveType == "bytes5[]" ||
|
|
primitiveType == "bytes6" ||
|
|
primitiveType == "bytes6[]" ||
|
|
primitiveType == "bytes7" ||
|
|
primitiveType == "bytes7[]" ||
|
|
primitiveType == "bytes8" ||
|
|
primitiveType == "bytes8[]" ||
|
|
primitiveType == "bytes9" ||
|
|
primitiveType == "bytes9[]" ||
|
|
primitiveType == "bytes10" ||
|
|
primitiveType == "bytes10[]" ||
|
|
primitiveType == "bytes11" ||
|
|
primitiveType == "bytes11[]" ||
|
|
primitiveType == "bytes12" ||
|
|
primitiveType == "bytes12[]" ||
|
|
primitiveType == "bytes13" ||
|
|
primitiveType == "bytes13[]" ||
|
|
primitiveType == "bytes14" ||
|
|
primitiveType == "bytes14[]" ||
|
|
primitiveType == "bytes15" ||
|
|
primitiveType == "bytes15[]" ||
|
|
primitiveType == "bytes16" ||
|
|
primitiveType == "bytes16[]" ||
|
|
primitiveType == "bytes17" ||
|
|
primitiveType == "bytes17[]" ||
|
|
primitiveType == "bytes18" ||
|
|
primitiveType == "bytes18[]" ||
|
|
primitiveType == "bytes19" ||
|
|
primitiveType == "bytes19[]" ||
|
|
primitiveType == "bytes20" ||
|
|
primitiveType == "bytes20[]" ||
|
|
primitiveType == "bytes21" ||
|
|
primitiveType == "bytes21[]" ||
|
|
primitiveType == "bytes22" ||
|
|
primitiveType == "bytes22[]" ||
|
|
primitiveType == "bytes23" ||
|
|
primitiveType == "bytes23[]" ||
|
|
primitiveType == "bytes24" ||
|
|
primitiveType == "bytes24[]" ||
|
|
primitiveType == "bytes25" ||
|
|
primitiveType == "bytes25[]" ||
|
|
primitiveType == "bytes26" ||
|
|
primitiveType == "bytes26[]" ||
|
|
primitiveType == "bytes27" ||
|
|
primitiveType == "bytes27[]" ||
|
|
primitiveType == "bytes28" ||
|
|
primitiveType == "bytes28[]" ||
|
|
primitiveType == "bytes29" ||
|
|
primitiveType == "bytes29[]" ||
|
|
primitiveType == "bytes30" ||
|
|
primitiveType == "bytes30[]" ||
|
|
primitiveType == "bytes31" ||
|
|
primitiveType == "bytes31[]" ||
|
|
primitiveType == "bytes32" ||
|
|
primitiveType == "bytes32[]" {
|
|
return true
|
|
}
|
|
if primitiveType == "int" ||
|
|
primitiveType == "int[]" ||
|
|
primitiveType == "int8" ||
|
|
primitiveType == "int8[]" ||
|
|
primitiveType == "int16" ||
|
|
primitiveType == "int16[]" ||
|
|
primitiveType == "int32" ||
|
|
primitiveType == "int32[]" ||
|
|
primitiveType == "int64" ||
|
|
primitiveType == "int64[]" ||
|
|
primitiveType == "int128" ||
|
|
primitiveType == "int128[]" ||
|
|
primitiveType == "int256" ||
|
|
primitiveType == "int256[]" {
|
|
return true
|
|
}
|
|
if primitiveType == "uint" ||
|
|
primitiveType == "uint[]" ||
|
|
primitiveType == "uint8" ||
|
|
primitiveType == "uint8[]" ||
|
|
primitiveType == "uint16" ||
|
|
primitiveType == "uint16[]" ||
|
|
primitiveType == "uint32" ||
|
|
primitiveType == "uint32[]" ||
|
|
primitiveType == "uint64" ||
|
|
primitiveType == "uint64[]" ||
|
|
primitiveType == "uint128" ||
|
|
primitiveType == "uint128[]" ||
|
|
primitiveType == "uint256" ||
|
|
primitiveType == "uint256[]" {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// validate checks if the given domain is valid, i.e. contains at least
|
|
// the minimum viable keys and values
|
|
func (domain *TypedDataDomain) validate() error {
|
|
if domain.ChainId == nil {
|
|
return errors.New("chainId must be specified according to EIP-155")
|
|
}
|
|
|
|
if len(domain.Name) == 0 && len(domain.Version) == 0 && len(domain.VerifyingContract) == 0 && len(domain.Salt) == 0 {
|
|
return errors.New("domain is undefined")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Map is a helper function to generate a map version of the domain
|
|
func (domain *TypedDataDomain) Map() map[string]interface{} {
|
|
dataMap := map[string]interface{}{}
|
|
|
|
if domain.ChainId != nil {
|
|
dataMap["chainId"] = domain.ChainId
|
|
}
|
|
|
|
if len(domain.Name) > 0 {
|
|
dataMap["name"] = domain.Name
|
|
}
|
|
|
|
if len(domain.Version) > 0 {
|
|
dataMap["version"] = domain.Version
|
|
}
|
|
|
|
if len(domain.VerifyingContract) > 0 {
|
|
dataMap["verifyingContract"] = domain.VerifyingContract
|
|
}
|
|
|
|
if len(domain.Salt) > 0 {
|
|
dataMap["salt"] = domain.Salt
|
|
}
|
|
return dataMap
|
|
}
|