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core: adjust contract script check on deploy

Browse source 
Reference implementation doesn't panic if the method offset is out of
the contract script bounds, see:
736c346b9d/src/neo/SmartContract/Helper.cs (L82)
and
a65487fa56/src/Neo.VM/Script.cs (L146).

This commit fixes T5 statediff at block #125000. Neo-go node FAULTed the
deploying transaction:
```
         {
            "version" : 0,
            "sysfee" : "1000106065",
            "validuntilblock" : 130758,
            "script" : "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",
            "hash" : "0x40302bcf2021f63a1c24f6009e154c3200f73ad2fe1462d7d599145823dbfa7e",
            "witnesses" : [
               {
                  "verification" : "DCECExn08eznGBdguHbcwI+R2//EtVdDx4qf6CeizHqOJgBBVuezJw==",
                  "invocation" : "DEBtoq+T9NrammQjuYnifco7KHCTk2v+woEJqJCUMr9IscS7PaZaN3FNzSt11yUglIi3T0CJ17KwArBOBvJ8kwq2"
               }
            ],
            "attributes" : [],
            "signers" : [
               {
                  "scopes" : "None",
                  "account" : "0x13a192c56738900f9918d7f1ec07d9d8c278b804"
               }
            ],
            "size" : 1360,
            "nonce" : 1829882407,
            "sender" : "NLLvsqs7AyBNmQT6NThUxYWDFwV5b1evaK",
            "netfee" : "234352"
         }
```
Transaction script contains malformed contract manifest (all methods
offsets are set to be 22, while the contract script lenght is 22):
```
{
   "name" : "Nep17Token",
   "groups" : [],
   "extra" : {
      "description" : "A Simple Nep-17 Contract",
      "email" : "developer@neo.org",
      "author" : "lazynode"
   },
   "permissions" : [
      {
         "contract" : "*",
         "methods" : "*"
      }
   ],
   "features" : {},
   "supportedstandards" : [
      "NEP-17"
   ],
   "abi" : {
      "events" : [
         {
            "parameters" : [
               {
                  "name" : "from",
                  "type" : "Hash160"
               },
               {
                  "type" : "Hash160",
                  "name" : "to"
               },
               {
                  "name" : "amount",
                  "type" : "Integer"
               }
            ],
            "name" : "Transfer"
         }
      ],
      "methods" : [
         {
            "safe" : true,
            "offset" : 22,
            "name" : "symbol",
            "returntype" : "String",
            "parameters" : []
         },
         {
            "returntype" : "Integer",
            "parameters" : [],
            "safe" : true,
            "offset" : 22,
            "name" : "decimals"
         },
         {
            "parameters" : [],
            "returntype" : "Integer",
            "name" : "totalSupply",
            "safe" : true,
            "offset" : 22
         },
         {
            "parameters" : [
               {
                  "name" : "owner",
                  "type" : "Hash160"
               }
            ],
            "returntype" : "Integer",
            "name" : "balanceOf",
            "offset" : 22,
            "safe" : true
         },
         {
            "name" : "transfer",
            "offset" : 22,
            "safe" : false,
            "parameters" : [
               {
                  "type" : "Hash160",
                  "name" : "from"
               },
               {
                  "name" : "to",
                  "type" : "Hash160"
               },
               {
                  "name" : "amount",
                  "type" : "Integer"
               },
               {
                  "name" : "data",
                  "type" : "Any"
               }
            ],
            "returntype" : "Boolean"
         }
      ]
   },
   "trusts" : []
}
```
This commit is contained in:
Anna Shaleva 2022-06-02 09:00:59 +03:00
parent 1472c271e6
commit 16bf7c1426
2 changed files with 11 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
pkg/core/native/management.go
View file

@ -614,7 +614,7 @@ func checkScriptAndMethods(script []byte, methods []manifest.Method) error {
offsets := bitfield.New(l) offsets := bitfield.New(l)
for i := range methods { for i := range methods {
if methods[i].Offset >= l { if methods[i].Offset >= l {
return errors.New("out of bounds method offset") continue
} }
offsets.Set(methods[i].Offset) offsets.Set(methods[i].Offset)
} }

13
pkg/core/native/native_test/management_test.go
View file

@ -135,13 +135,20 @@ func TestManagement_ContractDeploy(t *testing.T) {
badManifest := cs1.Manifest badManifest := cs1.Manifest
badManifest.ABI.Methods = make([]manifest.Method, len(cs1.Manifest.ABI.Methods)) badManifest.ABI.Methods = make([]manifest.Method, len(cs1.Manifest.ABI.Methods))
copy(badManifest.ABI.Methods, cs1.Manifest.ABI.Methods) copy(badManifest.ABI.Methods, cs1.Manifest.ABI.Methods)
badManifest.ABI.Methods[0].Offset = 100500 // out of bounds badManifest.ABI.Methods[0].Offset = 100500 // out of bounds, but it's OK, this method will not be checked then.
manifB, err := json.Marshal(&badManifest) manifB, err := json.Marshal(&badManifest)
require.NoError(t, err) require.NoError(t, err)
managementInvoker.InvokeFail(t, "out of bounds method offset", "deploy", nefBytes, manifB) tx := c.PrepareInvokeNoSign(t, "deploy", nefBytes, manifB)
}) tx.Signers = []transaction.Signer{{}} // Need dummy signer to deploy.
b := c.NewUnsignedBlock(t, tx)
ic := c.Chain.GetTestVM(trigger.Application, tx, b)
t.Cleanup(ic.Finalize)
ic.VM.LoadWithFlags(tx.Script, callflag.All)
err = ic.VM.Run()
require.NoError(t, err)
})
t.Run("bad methods in manifest 2", func(t *testing.T) { t.Run("bad methods in manifest 2", func(t *testing.T) {
var badManifest = cs1.Manifest var badManifest = cs1.Manifest
badManifest.ABI.Methods = make([]manifest.Method, len(cs1.Manifest.ABI.Methods)) badManifest.ABI.Methods = make([]manifest.Method, len(cs1.Manifest.ABI.Methods))