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interop: add keccak256 implementation

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Port neo-project/neo#2925.

Close #3295

Signed-off-by: Ekaterina Pavlova <ekt@morphbits.io>
This commit is contained in:
Ekaterina Pavlova 2024-01-25 16:32:03 +03:00
parent fa1c07e7e6
commit 1840c057bd
5 changed files with 97 additions and 0 deletions
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19
pkg/core/native/crypto.go
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@ -20,6 +20,7 @@ import (
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"github.com/twmb/murmur3"
"golang.org/x/crypto/sha3"
)
// Crypto represents CryptoLib contract.
@ -101,6 +102,10 @@ func newCrypto() *Crypto {
md = newMethodAndPrice(c.bls12381Pairing, 1<<23, callflag.NoneFlag)
c.AddMethod(md, desc)
desc = newDescriptor("keccak256", smartcontract.ByteArrayType,
manifest.NewParameter("data", smartcontract.ByteArrayType))
md = newMethodAndPrice(c.keccak256, 1<<15, callflag.NoneFlag)
c.AddMethod(md, desc)
return c
}
@ -285,6 +290,20 @@ func (c *Crypto) bls12381Pairing(_ *interop.Context, args []stackitem.Item) stac
return stackitem.NewInterop(p)
}
func (c *Crypto) keccak256(_ *interop.Context, args []stackitem.Item) stackitem.Item {
bs, err := args[0].TryBytes()
if err != nil {
panic(err)
}
digest := sha3.NewLegacyKeccak256()
_, err = digest.Write(bs)
if err != nil {
panic(err)
}
return stackitem.NewByteArray(digest.Sum(nil))
}
// Metadata implements the Contract interface.
func (c *Crypto) Metadata() *interop.ContractMD {
return &c.ContractMD