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opt keccak host circuit #2

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merged 1 commit into from
Jan 3, 2024
Merged

opt keccak host circuit #2

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17 changes: 14 additions & 3 deletions op-program/client/io_wasm.go
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,14 @@ func (o wasmHostIO) Get(key preimage.Key) []byte {
_, _isPublic := key.(preimage.LocalIndexKey)

size := wasm_input(0)
buf := make([]byte, size)
padding := size % 136
if padding != 0 {
padding = 136 - padding
} else {
padding = 136
}

buf := make([]byte, size+padding)

ssize := size / 8
for i := uint64(0); i < ssize; i++ {
Expand All @@ -76,11 +83,11 @@ func (o wasmHostIO) Get(key preimage.Key) []byte {
// TODO: can use customized circuit to optimize
if !_isPublic {
// hash := crypto.Keccak256Hash(buf)
hash := Keccak256Hash(buf)
hash := Keccak256Hash(buf, size, padding)
hash[0] = _key[0]
require_bool(hash == _key)
}
return buf
return buf[:size]
}

func (o wasmHostIO) Hint(v preimage.Hint) {
Expand All @@ -100,6 +107,10 @@ func wasm_output(value uint64)
//go:noescape
func require(uint32)

//go:wasmimport env wasm_dbg
//go:noescape
func wasm_dbg(uint64)

func require_bool(cond bool) {
if cond {
require(1)
Expand Down
106 changes: 31 additions & 75 deletions op-program/client/keccak256_wasm.go
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Original file line number Diff line number Diff line change
Expand Up @@ -17,89 +17,45 @@ func keccak_push(uint64)
//go:noescape
func keccak_finalize() uint64

type KeccakHasher struct {
data uint64
byteIdx uint64
bufSize uint64
}

func NewKeccakHasher() *KeccakHasher {
keccak_new(1)
return &KeccakHasher{
data: 0,
byteIdx: 0,
bufSize: 0,
}
}
var hash [32]byte

func (kh *KeccakHasher) UpdateByte(v byte) {
kh.data += uint64(v) << (kh.byteIdx * 8)
kh.byteIdx++
if kh.byteIdx >= 8 {
keccak_push(kh.data)
kh.data = 0
kh.byteIdx = 0
kh.bufSize++

if kh.bufSize == 17 {
keccak_finalize()
keccak_finalize()
keccak_finalize()
keccak_finalize()
keccak_new(0)
kh.bufSize = 0
}
}
}

func (kh *KeccakHasher) Finalize() [4]uint64 {
bytesToPad := 136 - kh.byteIdx - kh.bufSize*8
if bytesToPad == 1 {
var result uint64 = 0x81 << 56
keccak_push(kh.data + result)
func Keccak256Hash(data []byte, size uint64, padding uint64) [32]byte {
total_len := len(data)
if padding == 1 {
data[total_len-1] = 0x81
} else {
kh.UpdateByte(1)
for i := 0; i < int(bytesToPad)-2; i++ {
kh.UpdateByte(0)
}
var result uint64 = 0x80 << 56
keccak_push(kh.data ^ result)
data[size] = 0x01
data[total_len-1] = 0x80
}

return [4]uint64{
keccak_finalize(),
keccak_finalize(),
keccak_finalize(),
keccak_finalize(),
}
}
var hash_0 uint64
var hash_1 uint64
var hash_2 uint64
var hash_3 uint64

func Keccak256Hash(data ...[]byte) (output [32]byte) {
hasher := NewKeccakHasher()
for _, value := range data {
for _, byteValue := range value {
hasher.UpdateByte(byteValue)
}
}
result := hasher.Finalize()
for i, val := range result {
binary.LittleEndian.PutUint64(output[i*8:], val)
}
return output
}
var val uint64

func Keccak256HashSimple(data ...[]byte) (output [32]byte) {
hasher := NewKeccakHasher()
for _, value := range data {
for _, byteValue := range value {
hasher.UpdateByte(byteValue)
round := total_len / 136
keccak_new(1)
for i := 0; i < round; i++ {
for j := 0; j < 17; j++ {
start := i*136 + j*8
val = binary.LittleEndian.Uint64(data[start : start+8])
keccak_push(val)
}
hash_0 = keccak_finalize()
hash_1 = keccak_finalize()
hash_2 = keccak_finalize()
hash_3 = keccak_finalize()
keccak_new(0)
}
result := hasher.Finalize()
for i, val := range result {
binary.LittleEndian.PutUint64(output[i*8:], val)
}
return output

binary.LittleEndian.PutUint64(hash[:], hash_0)
binary.LittleEndian.PutUint64(hash[8:], hash_1)
binary.LittleEndian.PutUint64(hash[16:], hash_2)
binary.LittleEndian.PutUint64(hash[24:], hash_3)

return hash
}

/*
Expand Down