47 lines
787 B
Go
47 lines
787 B
Go
package main
|
|
|
|
import (
|
|
"encoding/hex"
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/zeebo/blake3"
|
|
)
|
|
|
|
var (
|
|
help = flag.Bool("h", false, "Prints help information")
|
|
length = flag.Int("l", 32, "The number of output bytes, prior to hex encoding (default 32)")
|
|
)
|
|
|
|
func main() {
|
|
flag.Parse()
|
|
if *help || len(flag.Args()) == 0 {
|
|
flag.Usage()
|
|
os.Exit(0)
|
|
}
|
|
buf := [65536]byte{}
|
|
for _, name := range flag.Args() {
|
|
file, err := os.Open(name)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
hasher := blake3.NewSized(*length)
|
|
for {
|
|
n, err := file.Read(buf[:])
|
|
hasher.Write(buf[:n])
|
|
if err == io.EOF {
|
|
break
|
|
} else if err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
file.Close()
|
|
hash := hasher.Sum([]byte{})
|
|
fmt.Print(hex.EncodeToString(hash))
|
|
fmt.Print(" ")
|
|
fmt.Println(name)
|
|
}
|
|
}
|