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36 lines
661 B
Go
36 lines
661 B
Go
// Package checksum contain algorithms to checksum files
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package checksum
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import (
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"crypto/sha256"
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"encoding/hex"
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"hash"
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"io"
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"os"
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)
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// SHA256 sum of the given file
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func SHA256(path string) (result string, err error) {
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return calculate(sha256.New(), path)
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}
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func calculate(hash hash.Hash, path string) (result string, err error) {
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file, err := os.Open(path)
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if err != nil {
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return
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}
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defer func() { _ = file.Close() }()
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return doCalculate(hash, file)
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}
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func doCalculate(hash hash.Hash, file *os.File) (result string, err error) {
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_, err = io.Copy(hash, file)
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if err != nil {
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return
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}
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result = hex.EncodeToString(hash.Sum(nil))
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return
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}
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