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imgsrv/hash.go
2013-02-08 23:52:40 -05:00

33 lines
657 B
Go

package main
import (
"crypto/md5"
"fmt"
"hash/adler32"
"io"
"time"
)
/* Convinience method for getting md5 sum of a string */
func GetMd5FromString(blob string) (sum []byte) {
h := md5.New()
defer h.Reset()
io.WriteString(h,blob)
return h.Sum(nil)
}
/* Convinience method for getting md5 sum of some bytes */
func GetMd5FromBytes(blob []byte) (sum []byte) {
h := md5.New()
defer h.Reset()
h.Write(blob)
return h.Sum(nil)
}
/* get a small, decently unique hash */
func GetSmallHash() (small_hash string) {
h := adler32.New()
io.WriteString(h, fmt.Sprintf("%d", time.Now().Unix()))
return fmt.Sprintf("%X", h.Sum(nil))
}