验证结果网址 http://www.fileformat.info/tool/hash.htm

"golang.org/x/crypto/md4"不存在时，解决方法：

cd $GOPATH/src

mkdir -p golang.org/x/

cd  golang.org/x/

git clone https://github.com/golang/crypto.git

实现md4加密算法

package main

import (

    "encoding/hex"

    "fmt"

    "hash"

    "golang.org/x/crypto/md4"

)

func main() {

    res := MD4("123456")

    fmt.Println(res)

}

// MD4 MD4

func MD4(text string) string {

    var hashInstance hash.Hash

    hashInstance = md4.New()

    arr, _ := hex.DecodeString(text)

    hashInstance.Write(arr)

    bytes := hashInstance.Sum(nil)

    return fmt.Sprintf("%x", bytes)

}

实现封装哈希加密算法

package main

import (

    "crypto/md5"

    "crypto/sha1"

    "crypto/sha256"

    "crypto/sha512"

    "encoding/hex"

    "fmt"

    "hash"

    "golang.org/x/crypto/md4"

    "golang.org/x/crypto/ripemd160"

)

func main() {

    res := HASH("123456", "sha256", true)

    fmt.Println(res)

}

// HASH HASH

func HASH(text string, hashType string, isHex bool) string {

    var hashInstance hash.Hash

    switch hashType {

    case "md4":

        hashInstance = md4.New()

    case "md5":

        hashInstance = md5.New()

    case "sha1":

        hashInstance = sha1.New()

    case "sha256":

        hashInstance = sha256.New()

    case "sha512":

        hashInstance = sha512.New()

    case "ripemd160":

        hashInstance = ripemd160.New()

    }

    if isHex {

        arr, _ := hex.DecodeString(text)

        hashInstance.Write(arr)

    } else {

        hashInstance.Write([]byte(text))

    }

    bytes := hashInstance.Sum(nil)

    return fmt.Sprintf("%x", bytes)

}

// MD4 MD4

func MD4(text string, isHex bool) string {

    var hashInstance hash.Hash

    hashInstance = md4.New()

    if isHex {

        arr, _ := hex.DecodeString(text)

        fmt.Println(arr)

        hashInstance.Write(arr)

    } else {

        hashInstance.Write([]byte(text))

    }

    bytes := hashInstance.Sum(nil)

    return fmt.Sprintf("%x", bytes)

}

// MD5 MD5

func MD5(text string, isHex bool) string {

    var hashInstance hash.Hash

    hashInstance = md5.New()

    if isHex {

        arr, _ := hex.DecodeString(text)

        fmt.Println(arr)

        hashInstance.Write(arr)

    } else {

        hashInstance.Write([]byte(text))

    }

    bytes := hashInstance.Sum(nil)

    return fmt.Sprintf("%x", bytes)

}

实现双哈希算法

func sha256Double(text string, isHex bool) []byte {

    hashInstance := sha256.New()

    if isHex {

        arr, _ := hex.DecodeString(text)

        hashInstance.Write(arr)

    } else {

        hashInstance.Write([]byte(text))

    }

    bytes := hashInstance.Sum(nil)

    hashInstance.Reset()

    hashInstance.Write(bytes)

    bytes = hashInstance.Sum(nil)

    return bytes

}

func sha256DoubleString(text string, isHex bool) string {

    bytes := sha256Double(text, isHex)

    return fmt.Sprintf("%x", bytes)

}