mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-22 03:30:37 +00:00
64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
/*
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Copyright 2022 Erigon-Lightclient contributors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package utils
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import (
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"crypto/sha256"
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"hash"
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"sync"
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)
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type HashFunc func(data []byte, extras ...[]byte) [32]byte
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var hasherPool = sync.Pool{
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New: func() interface{} {
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return sha256.New()
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},
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}
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// General purpose Sha256
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func Sha256(data []byte, extras ...[]byte) [32]byte {
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h, ok := hasherPool.Get().(hash.Hash)
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if !ok {
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h = sha256.New()
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}
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defer hasherPool.Put(h)
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h.Reset()
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var b [32]byte
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h.Write(data)
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for _, extra := range extras {
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h.Write(extra)
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}
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h.Sum(b[:0])
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return b
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}
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// Optimized Sha256, avoid pool.put/pool.get, meant for intensive operations.
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// this version is not thread safe
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func OptimizedSha256NotThreadSafe() HashFunc {
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h := sha256.New()
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var b [32]byte
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return func(data []byte, extras ...[]byte) [32]byte {
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h.Reset()
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h.Write(data)
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for _, extra := range extras {
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h.Write(extra)
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}
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h.Sum(b[:0])
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return b
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}
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}
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