52 lines
781 B
Go
52 lines
781 B
Go
package fs
|
|
|
|
import (
|
|
"crypto/sha1"
|
|
"encoding/hex"
|
|
"hash/crc32"
|
|
"io"
|
|
"os"
|
|
)
|
|
|
|
// Hash returns the SHA1 hash of a file as string.
|
|
func Hash(filename string) string {
|
|
var result []byte
|
|
|
|
file, err := os.Open(filename)
|
|
|
|
if err != nil {
|
|
return ""
|
|
}
|
|
|
|
defer file.Close()
|
|
|
|
hash := sha1.New()
|
|
|
|
if _, err := io.Copy(hash, file); err != nil {
|
|
return ""
|
|
}
|
|
|
|
return hex.EncodeToString(hash.Sum(result))
|
|
}
|
|
|
|
// Checksum returns the CRC32 checksum of a file as string.
|
|
func Checksum(filename string) string {
|
|
var result []byte
|
|
|
|
file, err := os.Open(filename)
|
|
|
|
if err != nil {
|
|
return ""
|
|
}
|
|
|
|
defer file.Close()
|
|
|
|
hash := crc32.New(crc32.MakeTable(crc32.Castagnoli))
|
|
|
|
if _, err := io.Copy(hash, file); err != nil {
|
|
return ""
|
|
}
|
|
|
|
return hex.EncodeToString(hash.Sum(result))
|
|
}
|