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30 lines
415 B
30 lines
415 B
3 years ago
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package crypto
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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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// SHA256 returns SHA256 hash.
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func SHA256(from ...[]byte) []byte {
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h := getSHA256()
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defer sha256Pool.Put(h)
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for _, b := range from {
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_, _ = h.Write(b)
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}
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return h.Sum(nil)
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}
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var sha256Pool = &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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func getSHA256() hash.Hash {
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h := sha256Pool.Get().(hash.Hash)
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h.Reset()
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return h
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}
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