107 lines
3.1 KiB
Go
107 lines
3.1 KiB
Go
package runtime
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import (
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"github.com/nspcc-dev/neo-go/pkg/core/interop"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm"
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"github.com/pkg/errors"
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)
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// CheckHashedWitness checks given hash against current list of script hashes
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// for verifying in the interop context.
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func CheckHashedWitness(ic *interop.Context, v vm.ScriptHashGetter, hash util.Uint160) (bool, error) {
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if tx, ok := ic.Container.(*transaction.Transaction); ok {
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return checkScope(tx, v, hash)
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}
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// only for non-Transaction types (Block, etc.)
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hashes, err := ic.Chain.GetScriptHashesForVerifying(ic.Tx)
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if err != nil {
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return false, errors.Wrap(err, "failed to get script hashes")
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}
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for _, v := range hashes {
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if hash.Equals(v) {
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return true, nil
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}
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}
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return false, nil
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}
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func checkScope(tx *transaction.Transaction, v vm.ScriptHashGetter, hash util.Uint160) (bool, error) {
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for _, c := range tx.Cosigners {
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if c.Account == hash {
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if c.Scopes == transaction.Global {
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return true, nil
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}
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if c.Scopes&transaction.CalledByEntry != 0 {
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callingScriptHash := v.GetCallingScriptHash()
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entryScriptHash := v.GetEntryScriptHash()
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if callingScriptHash == entryScriptHash {
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return true, nil
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}
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}
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if c.Scopes&transaction.CustomContracts != 0 {
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currentScriptHash := v.GetCurrentScriptHash()
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for _, allowedContract := range c.AllowedContracts {
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if allowedContract == currentScriptHash {
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return true, nil
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}
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}
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}
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if c.Scopes&transaction.CustomGroups != 0 {
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return true, nil
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// TODO: we don't currently have Manifest field in ContractState
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/*callingScriptHash := v.GetCallingScriptHash()
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if callingScriptHash.Equals(util.Uint160{}){
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return false, nil
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}
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cs, err := ic.DAO.GetContractState(callingScriptHash)
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if err != nil {
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return false, err
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}
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// check if the current group is the required one
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for _, allowedGroup := range c.AllowedGroups {
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for _, group := range cs.Manifest.Groups {
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if group.PublicKey.Equal(allowedGroup) {
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return true, nil
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}
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}
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}*/
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}
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return false, nil
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}
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}
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return false, nil
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}
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// CheckKeyedWitness checks hash of signature check contract with a given public
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// key against current list of script hashes for verifying in the interop context.
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func CheckKeyedWitness(ic *interop.Context, v vm.ScriptHashGetter, key *keys.PublicKey) (bool, error) {
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return CheckHashedWitness(ic, v, key.GetScriptHash())
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}
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// CheckWitness checks witnesses.
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func CheckWitness(ic *interop.Context, v *vm.VM) error {
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var res bool
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var err error
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hashOrKey := v.Estack().Pop().Bytes()
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hash, err := util.Uint160DecodeBytesBE(hashOrKey)
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if err != nil {
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var key *keys.PublicKey
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key, err = keys.NewPublicKeyFromBytes(hashOrKey)
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if err != nil {
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return errors.New("parameter given is neither a key nor a hash")
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}
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res, err = CheckKeyedWitness(ic, v, key)
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} else {
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res, err = CheckHashedWitness(ic, v, hash)
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}
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if err != nil {
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return errors.Wrap(err, "failed to check")
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}
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v.Estack().PushVal(res)
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return nil
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}
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