go-asink/hash.go

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346 B
Go
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2013-02-10 23:39:23 -05:00
package main
import (
"io"
"os"
"fmt"
"crypto/sha256"
)
func HashFile(filename string) (string, error) {
hashfn := sha256.New()
infile, err := os.Open(filename)
if err != nil { return "", err }
defer infile.Close()
_, err = io.Copy(hashfn, infile)
if err != nil { return "", err }
return fmt.Sprintf("%x", hashfn.Sum(nil)), nil
}