1
0
Fork 0
mirror of https://github.com/vbatts/imgsrv.git synced 2024-12-25 15:26:30 +00:00
imgsrv/hash/hash.go
2013-05-09 09:47:24 -04:00

37 lines
700 B
Go

package hash
import (
"crypto/md5"
"fmt"
"hash/adler32"
"io"
"math/rand"
"time"
)
func Rand64() int64 {
return rand.Int63()
}
/* 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))
}