Golang两种MD5加密方式

代码

package main

import (
	"crypto/md5"
	"encoding/hex"
	"fmt"
)

func main() {
	// md5 加密的第一种方法
	srcData := []byte("iyannik0215")
	cipherText1 := md5.Sum(srcData)
	fmt.Printf("md5 encrypto is \"iyannik0215\": %x \n", cipherText1)

	// md5 加密的第二种方法
	hash := md5.New()
	hash.Write(srcData)
	cipherText2 := hash.Sum(nil)
	hexText := make([]byte, 32)
	hex.Encode(hexText, cipherText2)
	fmt.Println("md5 encrypto is \"iyannik0215\":", string(hexText))
}

# 执行结果
md5 encrypto is "iyannik0215": b6b20c73e6bc53bc691a6bb559cf9ca9
md5 encrypto is "iyannik0215": b6b20c73e6bc53bc691a6bb559cf9ca9

不同

//Source file src/crypto/md5/md5.go
19	// The size of an MD5 checksum in bytes.
20	const Size = 16

130	// Sum returns the MD5 checksum of the data.
131	func Sum(data []byte) [Size]byte {
132		var d digest
133		d.Reset()
134		d.Write(data)
135		return d.checkSum()
136	}

//Source file src/crypto/md5/md5.go
50	// New returns a new hash.Hash computing the MD5 checksum.
51	func New() hash.Hash {
52		d := new(digest)
53		d.Reset()
54		return d
55	}
// 这里只放了函数签名部分, 关于函数具体内容这里就不详细复制了.
51	func New() hash.Hash {}
61	func (d *digest) Write(p []byte) (nn int, err error) {}
90	func (d0 *digest) Sum(in []byte) []byte {}