Hack a call to precompiles

core/vm/contracts.go

@@ -20,6 +20,7 @@ import (
 	"crypto/sha256"
 	"encoding/binary"
 	"errors"
+	"fmt"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -28,6 +29,7 @@ import (
 	"github.com/ethereum/go-ethereum/crypto/blake2b"
 	"github.com/ethereum/go-ethereum/crypto/bn256"
 	"github.com/ethereum/go-ethereum/params"
+	life_exec "github.com/perlin-network/life/exec"
 
 	//lint:ignore SA1019 Needed for precompile
 	"golang.org/x/crypto/ripemd160"
@@ -41,6 +43,76 @@ type PrecompiledContract interface {
 	Run(input []byte) ([]byte, error) // Run runs the precompiled contract
 }
 
+type wasmPrecompile struct {
+	vm         *life_exec.VirtualMachine
+	entrypoint int
+}
+
+type wasmPrecompileResolver struct{}
+
+func (wpr *wasmPrecompileResolver) ResolveFunc(module, field string) life_exec.FunctionImport {
+	return func(vm *life_exec.VirtualMachine) int64 {
+		return 0
+	}
+}
+
+func (wpr *wasmPrecompileResolver) ResolveGlobal(module, field string) int64 {
+	panic(fmt.Sprintf("Should not try to resolve globals, asked for %s", field))
+}
+
+func newWasmPrecompile(code []byte) *wasmPrecompile {
+	vm, err := life_exec.NewVirtualMachine(code, life_exec.VMConfig{DisableFloatingPoint: true}, &wasmPrecompileResolver{}, nil)
+	if err != nil {
+		panic(fmt.Sprintf("error loading a precompile: %v", err))
+	}
+
+	entrypoint, ok := vm.GetFunctionExport("main")
+	if !ok {
+		panic("Wasm doesn't have a main function")
+	}
+
+	return &wasmPrecompile{
+		entrypoint: entrypoint,
+		vm:         vm,
+	}
+}
+
+func (wp *wasmPrecompile) RequiredGas(input []byte) uint64 {
+	return 0
+}
+
+var addrList = []byte{229, 228, 160, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 128, 128, 0}
+var serializedProof = []byte{248, 110, 225, 160, 251, 145, 132, 252, 92, 249, 202, 65, 20, 16, 160, 32, 246, 163, 155, 125, 17, 186, 16, 171, 64, 108, 250, 70, 60, 207, 16, 164, 199, 41, 252, 143, 248, 56, 179, 242, 144, 49, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 160, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 131, 194, 32, 128, 209, 193, 1, 194, 128, 128, 194, 2, 31, 194, 4, 1, 194, 2, 128, 194, 4, 2}
+
+func (wp *wasmPrecompile) Run(input []byte) ([]byte, error) {
+	valid, ok := wp.vm.GetGlobalExport("valid")
+	if !ok || valid > len(wp.vm.Globals) || valid < 0 {
+		return nil, fmt.Errorf("Could not find valid in Wasm blob")
+	}
+
+	addrlist, ok := wp.vm.GetGlobalExport("address_list")
+	if !ok || addrlist > len(wp.vm.Globals) || addrlist < 0 {
+		return nil, fmt.Errorf("Could not find address_list in Wasm blob")
+	}
+	spAL := binary.LittleEndian.Uint32(wp.vm.Memory[wp.vm.Globals[addrlist]:])
+	copy(wp.vm.Memory[spAL:], addrList[:])
+
+	proof, ok := wp.vm.GetGlobalExport("serialized_proof")
+	if !ok || proof > len(wp.vm.Globals) || proof < 0 {
+		return nil, fmt.Errorf("Could not find address_list in Wasm blob")
+	}
+	spPtr := binary.LittleEndian.Uint32(wp.vm.Memory[wp.vm.Globals[proof]:])
+	copy(wp.vm.Memory[spPtr:], serializedProof[:])
+
+	ret, err := wp.vm.Run(wp.entrypoint)
+	if err != nil || ret < 0 {
+		wp.vm.PrintStackTrace()
+		frame := wp.vm.GetCurrentFrame()
+	}
+	validPtr := binary.LittleEndian.Uint32(wp.vm.Memory[wp.vm.Globals[valid]:])
+	return nil, err
+}
+
 // PrecompiledContractsHomestead contains the default set of pre-compiled Ethereum
 // contracts used in the Frontier and Homestead releases.
 var PrecompiledContractsHomestead = map[common.Address]PrecompiledContract{
@@ -75,6 +147,8 @@ var PrecompiledContractsIstanbul = map[common.Address]PrecompiledContract{
 	common.BytesToAddress([]byte{7}):  &bn256ScalarMulIstanbul{},
 	common.BytesToAddress([]byte{8}):  &bn256PairingIstanbul{},
 	common.BytesToAddress([]byte{9}):  &blake2F{},
+	common.BytesToAddress([]byte{10}): newWasmPrecompile(wasmVerify),
+	common.BytesToAddress([]byte{11}): newWasmPrecompile(wasmUpdate),
 }
 
 // RunPrecompiledContract runs and evaluates the output of a precompiled contract.

go.mod

@@ -19,7 +19,7 @@ require (
 	github.com/dlclark/regexp2 v1.2.0 // indirect
 	github.com/docker/docker v1.4.2-0.20180625184442-8e610b2b55bf
 	github.com/dop251/goja v0.0.0-20200106141417-aaec0e7bde29
-	github.com/edsrzf/mmap-go v0.0.0-20160512033002-935e0e8a636c
+	github.com/edsrzf/mmap-go v1.0.0
 	github.com/elastic/gosigar v0.8.1-0.20180330100440-37f05ff46ffa
 	github.com/fatih/color v1.3.0
 	github.com/fjl/memsize v0.0.0-20180418122429-ca190fb6ffbc
@@ -46,6 +46,7 @@ require (
 	github.com/naoina/toml v0.1.2-0.20170918210437-9fafd6967416
 	github.com/olekukonko/tablewriter v0.0.2-0.20190409134802-7e037d187b0c
 	github.com/pborman/uuid v0.0.0-20170112150404-1b00554d8222
+	github.com/perlin-network/life v0.0.0-20191203030451-05c0e0f7eaea
 	github.com/peterh/liner v1.1.1-0.20190123174540-a2c9a5303de7
 	github.com/prometheus/tsdb v0.6.2-0.20190402121629-4f204dcbc150
 	github.com/rjeczalik/notify v0.9.1

go.sum

@@ -67,6 +67,8 @@ github.com/dop251/goja v0.0.0-20200106141417-aaec0e7bde29 h1:Ewd9K+mC725sITA12QQ
 github.com/dop251/goja v0.0.0-20200106141417-aaec0e7bde29/go.mod h1:Mw6PkjjMXWbTj+nnj4s3QPXq1jaT0s5pC0iFD4+BOAA=
 github.com/edsrzf/mmap-go v0.0.0-20160512033002-935e0e8a636c h1:JHHhtb9XWJrGNMcrVP6vyzO4dusgi/HnceHTgxSejUM=
 github.com/edsrzf/mmap-go v0.0.0-20160512033002-935e0e8a636c/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
+github.com/edsrzf/mmap-go v1.0.0 h1:CEBF7HpRnUCSJgGUb5h1Gm7e3VkmVDrR8lvWVLtrOFw=
+github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
 github.com/elastic/gosigar v0.8.1-0.20180330100440-37f05ff46ffa h1:XKAhUk/dtp+CV0VO6mhG2V7jA9vbcGcnYF/Ay9NjZrY=
 github.com/elastic/gosigar v0.8.1-0.20180330100440-37f05ff46ffa/go.mod h1:cdorVVzy1fhmEqmtgqkoE3bYtCfSCkVyjTyCIo22xvs=
 github.com/fatih/color v1.3.0 h1:YehCCcyeQ6Km0D6+IapqPinWBK6y+0eB5umvZXK9WPs=
@@ -77,6 +79,8 @@ github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/gballet/go-libpcsclite v0.0.0-20190607065134-2772fd86a8ff h1:tY80oXqGNY4FhTFhk+o9oFHGINQ/+vhlm8HFzi6znCI=
 github.com/gballet/go-libpcsclite v0.0.0-20190607065134-2772fd86a8ff/go.mod h1:x7DCsMOv1taUwEWCzT4cmDeAkigA5/QCwUodaVOe8Ww=
+github.com/go-interpreter/wagon v0.6.0 h1:BBxDxjiJiHgw9EdkYXAWs8NHhwnazZ5P2EWBW5hFNWw=
+github.com/go-interpreter/wagon v0.6.0/go.mod h1:5+b/MBYkclRZngKF5s6qrgWxSLgE9F5dFdO1hAueZLc=
 github.com/go-kit/kit v0.8.0 h1:Wz+5lgoB0kkuqLEc6NVmwRknTKP6dTGbSqvhZtBI/j0=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0 h1:8HUsc87TaSWLKwrnumgC8/YconD2fJQsRJAsWaPg2ic=
@@ -152,6 +156,8 @@ github.com/opentracing/opentracing-go v1.1.0 h1:pWlfV3Bxv7k65HYwkikxat0+s3pV4bsq
 github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
 github.com/pborman/uuid v0.0.0-20170112150404-1b00554d8222 h1:goeTyGkArOZIVOMA0dQbyuPWGNQJZGPwPu/QS9GlpnA=
 github.com/pborman/uuid v0.0.0-20170112150404-1b00554d8222/go.mod h1:VyrYX9gd7irzKovcSS6BIIEwPRkP2Wm2m9ufcdFSJ34=
+github.com/perlin-network/life v0.0.0-20191203030451-05c0e0f7eaea h1:okKoivlkNRRLqXraEtatHfEhW+D71QTwkaj+4n4M2Xc=
+github.com/perlin-network/life v0.0.0-20191203030451-05c0e0f7eaea/go.mod h1:3KEU5Dm8MAYWZqity880wOFJ9PhQjyKVZGwAEfc5Q4E=
 github.com/peterh/liner v1.1.1-0.20190123174540-a2c9a5303de7 h1:oYW+YCJ1pachXTQmzR3rNLYGGz4g/UgFcjb28p/viDM=
 github.com/peterh/liner v1.1.1-0.20190123174540-a2c9a5303de7/go.mod h1:CRroGNssyjTd/qIG2FyxByd2S8JEAZXBl4qUrZf8GS0=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -191,13 +197,17 @@ github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJy
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d h1:gZZadD8H+fF+n9CmNhYL1Y0dJB+kLOmKd7FbPJLeGHs=
 github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d/go.mod h1:9OrXJhf154huy1nPWmuSrkgjPUtUNhA+Zmy+6AESzuA=
+github.com/twitchyliquid64/golang-asm v0.0.0-20190126203739-365674df15fc/go.mod h1:NoCfSFWosfqMqmmD7hApkirIK9ozpHjxRnRxs1l413A=
 github.com/tyler-smith/go-bip39 v1.0.1-0.20181017060643-dbb3b84ba2ef h1:wHSqTBrZW24CsNJDfeh9Ex6Pm0Rcpc7qrgKBiL44vF4=
 github.com/tyler-smith/go-bip39 v1.0.1-0.20181017060643-dbb3b84ba2ef/go.mod h1:sJ5fKU0s6JVwZjjcUEX2zFOnvq0ASQ2K9Zr6cf67kNs=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
+github.com/vmihailenco/msgpack v4.0.4+incompatible h1:dSLoQfGFAo3F6OoNhwUmLwVgaUXK79GlxNBwueZn0xI=
+github.com/vmihailenco/msgpack v4.0.4+incompatible/go.mod h1:fy3FlTQTDXWkZ7Bh6AcGMlsjHatGryHQYUTf1ShIgkk=
 github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 h1:1cngl9mPEoITZG8s8cVcUy5CeIBYhEESkOB7m6Gmkrk=
 github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208/go.mod h1:IotVbo4F+mw0EzQ08zFqg7pK3FebNXpaMsRy2RT+Ees=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190628185345-da137c7871d7 h1:rTIdg5QFRR7XCaK4LCjBiPbx8j4DQRpdYMnGn/bJUEU=
 golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -207,6 +217,7 @@ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190306220234-b354f8bf4d9e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7 h1:LepdCS8Gf/MVejFIt8lsiexZATdoGVyp5bcyS+rYoUI=
 golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -215,6 +226,7 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 h1:SvFZT6jyqRaOeXpc5h/JSfZenJ2O330aBsf7JfSUXmQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+google.golang.org/appengine v1.6.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=