hebedich 通过本文主要向大家介绍了go语言函数,go语言,go语言环境搭建,go语言程序设计,let it go 25种语言等相关知识,希望对您有所帮助,也希望大家支持linkedu.com www.linkedu.com
myhash.go
/**
* Created with IntelliJ IDEA.
* User: liaojie
* Date: 12-9-8
* Time: 下午3:53
* To change this template use File | Settings | File Templates.
*/
package main
import (
"crypto/md5"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"flag" //命令行选项解析器
"fmt"
"hash"
"io"
"os"
)
var style = flag.String("s", "sha256", "采用的哈西函数:sha1,sha256")
var filename = flag.String("f", "", "需要计算散列值的文件名")
func main() {
flag.Parse()
var hs hash.Hash
switch *style {
case "md5":
hs = md5.New()
case "sha1":
hs = sha1.New()
case "sha512":
hs = sha512.New()
default:
hs = sha256.New()
}
if len(*filename) == 0 {
filein, err := os.Open(flag.Args()[len(flag.Args())-1])
if err != nil {
return
} else {
io.Copy(hs, filein)
}
} else {
filein, err := os.Open(*filename)
if err != nil {
return
} else {
io.Copy(hs, filein)
}
}
hashString := hs.Sum(nil)
fmt.Printf("%x\n", hashString)
}
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以上所述就是本文的全部内容了，希望大家能够喜欢。
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