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package core
import (
"bytes"
"crypto/sha1"
"fmt"
"io"
"strings"
)
// calculateStringHash calculates the sha1 checksum of a given string a.
func calculateStringHash(a string) (string, error) {
hash := sha1.New()
hash.Write([]byte(a))
hashInBytes := hash.Sum(nil)[:20]
return strings.TrimSpace(fmt.Sprintf("%x", hashInBytes)), nil
}
// CalculateBlockHash calculates the sha1 checksum of a given byte slice b.
func CalculateBlockHash(b []byte) (string, error) {
hash := sha1.New()
if _, err := io.Copy(hash, bytes.NewReader(b)); err != nil {
return "", err
}
hashInBytes := hash.Sum(nil)[:20]
return strings.TrimSpace(fmt.Sprintf("%x", hashInBytes)), nil
}
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