Longfellow ZK 0290cb32

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hash.h
1// Copyright 2025 Google LLC.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#ifndef PRIVACY_PROOFS_ZK_LIB_ALGEBRA_HASH_H_
16#define PRIVACY_PROOFS_ZK_LIB_ALGEBRA_HASH_H_
17
18#include <cstddef>
19#include <cstdint>
20
21#include "util/crc64.h"
22
23 namespace proofs {
24
25// canonical hash of an Elt
26 template <class Field>
27uint64_t elt_hash(const typename Field::Elt& k, const Field& F) {
28 uint64_t crc = 0x1;
29 uint8_t buf[Field::kBytes];
30 F.to_bytes_field(buf, k);
31 for (size_t l = 0; l < Field::kBytes; ++l) {
32 crc = crc64::update(crc, buf[l], 8);
33 }
34 return crc;
35}
36
37} // namespace proofs
38
39#endif // PRIVACY_PROOFS_ZK_LIB_ALGEBRA_HASH_H_
proofs::GF2_128::Elt
Definition gf2_128.h:63