Go语言的哈希函数

Go的 MD5、SHA-1函数使用方法

package main

import (
    "crypto/md5"
    "crypto/sha1"
    "fmt"
    "io"
    "os"
)

func main() {
    teststring := "welcome to beijing"

    //MD5
    Md5Inst := md5.New()
    Md5Inst.Write([]byte(teststring))
    result := Md5Inst.Sum([]byte(""))
    fmt.Printf("%x\n\n", result)

    //SHA1
    Sha1Inst := sha1.New()
    Sha1Inst.Write([]byte(teststring))
    result = Sha1Inst.Sum([]byte(""))
    fmt.Printf("%x\n\n", result)

    // file md5 and sha1
    testfile := "123.txt"
    infile, err := os.Open(testfile)
    if err != nil {
        //md5
        md5h := md5.New()
        io.Copy(md5h, infile)
        fmt.Printf("%x %s\n", md5h.Sum([]byte("")), testfile)

        //sha1
        sha1h := sha1.New()
        io.Copy(sha1h, infile)
        fmt.Printf("%x %s\n", sha1.Sum([]byte("")), testfile)
    } else {
        fmt.Println(err)
        os.Exit(1)
    }
}