Go语言加解密--AES简单实践

AES加解密的简单实现，代码如下。

package main

import (
	"crypto/aes"
	"crypto/cipher"
	"encoding/hex"
	"fmt"
)

func main(){

	nonce := "37b8e8a308c354048d245f6d"
	key := "AES256Key-32Characters1234567890"
	plainText := "172.10.99.88"
	cipherText :=	ExampleNewGCM_encrypt(plainText, key, nonce)
	newPlain := ExampleNewGCM_decrypt(cipherText, key, nonce)

	fmt.Println("plain:", plainText)
	fmt.Println("cipher:", cipherText)
	fmt.Println("new plain:", newPlain)
}

func ExampleNewGCM_encrypt(src, k, n string)string {
	// The key argument should be the AES key, either 16 or 32 bytes
	// to select AES-128 or AES-256.
	key := []byte(k)
	plaintext := []byte(src)

	block, err := aes.NewCipher(key)
	if err != nil {
		panic(err.Error())
	}

	nonce, _ := hex.DecodeString(n)

	aesgcm, err := cipher.NewGCM(block)
	if err != nil {
		panic(err.Error())
	}

	ciphertext := aesgcm.Seal(nil, nonce, plaintext, nil)

	return fmt.Sprintf("%x", ciphertext)
}

func ExampleNewGCM_decrypt(src, k, n string) string {
	// The key argument should be the AES key, either 16 or 32 bytes
	// to select AES-128 or AES-256.
	key := []byte(k)
	ciphertext, _ := hex.DecodeString(src)

	nonce, _ := hex.DecodeString(n)

	block, err := aes.NewCipher(key)
	if err != nil {
		panic(err.Error())
	}

	aesgcm, err := cipher.NewGCM(block)
	if err != nil {
		panic(err.Error())
	}

	plaintext, err := aesgcm.Open(nil, nonce, ciphertext, nil)
	if err != nil {
		panic(err.Error())
	}

	return string(plaintext)
}

Output:

plain: 172.10.99.88

cipher: 4456f9258c204906cbb2516e1fc78c3fbbf439e9e7d49189a391ee33

new plain: 172.10.99.88