go AES 加解密算法
更新时间: 2022-03-04 16:06:59 go语言如何实现AES加解密算法呢？人狠话不多，直接上代码
package main
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"encoding/hex"
"fmt"
"io"
)
/*
AES CBC 加密
key:加密key
plaintext：加密明文
ciphertext:解密返回字节字符串[ 整型以十六进制方式显示]
*/
func AESCBCEncrypt(key, plaintext string) (ciphertext string ,error string) {
plainbyte := []byte(plaintext)
keybyte := []byte(key)
if len(plainbyte)%aes.BlockSize != 0 {
return "" ,"plaintext is not a multiple of the block size"
}
block, err := aes.NewCipher(keybyte)
if err != nil {
return "" ,err.Error()
}
cipherbyte := make([]byte, aes.BlockSize+len(plainbyte))
iv := cipherbyte[:aes.BlockSize]
if _, err := io.ReadFull(rand.Reader, iv); err != nil {
return "" ,err.Error()
}
mode := cipher.NewCBCEncrypter(block, iv)
mode.CryptBlocks(cipherbyte[aes.BlockSize:], plainbyte)
ciphertext = fmt.Sprintf("%x\n", cipherbyte)
return
}
/*
AES CBC 解码
key:解密key
ciphertext:加密返回的串
plaintext：解密后的字符串
*/
func AESCBCDecrypter(key, ciphertext string) (plaintext string , error string) {
cipherbyte, _ := hex.DecodeString(ciphertext)
keybyte := []byte(key)
block, err := aes.NewCipher(keybyte)
if err != nil {
return "" ,err.Error()
}
if len(cipherbyte) < aes.BlockSize {
return "" ,"ciphertext too short"
}
iv := cipherbyte[:aes.BlockSize]
cipherbyte = cipherbyte[aes.BlockSize:]
if len(cipherbyte)%aes.BlockSize != 0 {
return "" ,"ciphertext is not a multiple of the block size"
}
mode := cipher.NewCBCDecrypter(block, iv)
mode.CryptBlocks(cipherbyte, cipherbyte)
//fmt.Printf("%s\n", ciphertext)
plaintext = string(cipherbyte[:])
return
}
/*
AES GCM 加密
key:加密key
plaintext：加密明文
ciphertext:解密返回字节字符串[ 整型以十六进制方式显示]
*/
func AESGCMEncrypt(key, plaintext string) (ciphertext string, noncetext string, error string) {
plainbyte := []byte(plaintext)
keybyte := []byte(key)
block, err := aes.NewCipher(keybyte)
if err != nil {
return "", "", err.Error()
}
// 由于存在重复的风险，请勿使用给定密钥使用超过2^32个随机值。
nonce := make([]byte, 12)
if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
return "", "", err.Error()
}
aesgcm, err := cipher.NewGCM(block)
if err != nil {
return "", "", err.Error()
}
cipherbyte := aesgcm.Seal(nil, nonce, plainbyte, nil)
ciphertext = fmt.Sprintf("%x\n", cipherbyte)
noncetext = fmt.Sprintf("%x\n", nonce)
return ciphertext, noncetext, ""
}
/*
AES GCM 解码
key:解密key
ciphertext:加密返回的串
plaintext：解密后的字符串
*/
func AESGCMDecrypter(key, ciphertext, noncetext string) (plaintext string , error string) {
if len(noncetext) < 24 {
return "", "noncetext too short"
}
nonce, _ := hex.DecodeString(noncetext)
cipherbyte, _ := hex.DecodeString(ciphertext)
keybyte := []byte(key)
block, err := aes.NewCipher(keybyte)
if err != nil {
return "", err.Error()
}
aesgcm, err := cipher.NewGCM(block)
if err != nil {
return "", err.Error()
}
plainbyte, err := aesgcm.Open(nil, nonce, cipherbyte, nil)
if err != nil {
return "", err.Error()
}
//fmt.Printf("%s\n", ciphertext)
plaintext = string(plainbyte[:])
return
}
func main() {
key := "example key 1234"
plaintext := "exampleplaintext"
ciphertext,_ := AESCBCEncrypt(key, plaintext)
//fmt.Println(ciphertext)
//
//plaintext = AESCBCDecrypter(key, ciphertext)
//fmt.Println(plaintext)
///GCM
noncetext := "mac"
ciphertext, noncetext, _ = AESGCMEncrypt(key, plaintext)
fmt.Println(ciphertext)
//ciphertext = "grt344gdfgsdfsfsfsfsfsdfsf"
//noncetext = "2b73b376e34aed44b646a4a4"
fmt.Println(noncetext)
plaintext,err := AESGCMDecrypter(key, ciphertext, noncetext)
fmt.Println(err)
fmt.Println(plaintext)
}