golang使用aes库实现加解密操作

golang实现加密解密的库很多，这里使用的是aes库+base64库来实现.

使用时，需要指定一个私钥，来进行加解密，这里指定是：

var aeskey = []byte(“321423u9y8d2fwfl”)

上代码：

package main
import (
 "fmt"
 "crypto/cipher"
 "crypto/aes"
 "bytes"
 "encoding/base64"
)
func pkcs5padding(ciphertext []byte, blocksize int) []byte {
 padding := blocksize - len(ciphertext)%blocksize
 padtext := bytes.repeat([]byte{byte(padding)}, padding)
 return append(ciphertext, padtext...)
}
func pkcs5unpadding(origdata []byte) []byte {
 length := len(origdata)
 unpadding := int(origdata[length-1])
 return origdata[:(length - unpadding)]
}
func aesencrypt(origdata, key []byte) ([]byte, error) {
 block, err := aes.newcipher(key)
 if err != nil {
  return nil, err
 }
 blocksize := block.blocksize()
 origdata = pkcs5padding(origdata, blocksize)
 blockmode := cipher.newcbcencrypter(block, key[:blocksize])
 crypted := make([]byte, len(origdata))
 blockmode.cryptblocks(crypted, origdata)
 return crypted, nil
}
func aesdecrypt(crypted, key []byte) ([]byte, error) {
 block, err := aes.newcipher(key)
 if err != nil {
  return nil, err
 }
 blocksize := block.blocksize()
 blockmode := cipher.newcbcdecrypter(block, key[:blocksize])
 origdata := make([]byte, len(crypted))
 blockmode.cryptblocks(origdata, crypted)
 origdata = pkcs5unpadding(origdata)
 return origdata, nil
}
func main() {
 var aeskey = []byte("321423u9y8d2fwfl")
 pass := []byte("vdncloud123456")
 xpass, err := aesencrypt(pass, aeskey)
 if err != nil {
  fmt.println(err)
  return
 }
 pass64 := base64.stdencoding.encodetostring(xpass)
 fmt.printf("加密后:%v\n",pass64)
 bytespass, err := base64.stdencoding.decodestring(pass64)
 if err != nil {
  fmt.println(err)
  return
 }
 tpass, err := aesdecrypt(bytespass, aeskey)
 if err != nil {
  fmt.println(err)
  return
 }
 fmt.printf("解密后:%s\n", tpass)
}

输出：

加密后：rlyzug0mcef2tbcjdhmyjg==

解密后：vdncloud123456

补充：golang aes cbc 加密

我就废话不多说了，大家还是直接看代码吧~

package main
import (
 "bytes"
 "crypto/aes"
 "crypto/cipher"
 "encoding/base64"
 "fmt"
)
const (
 key = "2018201820182018"
 iv = "1234567887654321"
)
func main() {
 str := "我勒个去"
 es, _ := aesencrypt(str, []byte(key))
 fmt.println(es)
 ds, _ := aesdecrypt(es, []byte(key))
 fmt.println(string(ds))
}
func aesencrypt(encodestr string, key []byte) (string, error) {
 encodebytes := []byte(encodestr)
 //根据key 生成密文
 block, err := aes.newcipher(key)
 if err != nil {
  return "", err
 }
 blocksize := block.blocksize()
 encodebytes = pkcs5padding(encodebytes, blocksize)
 blockmode := cipher.newcbcencrypter(block, []byte(iv))
 crypted := make([]byte, len(encodebytes))
 blockmode.cryptblocks(crypted, encodebytes)
 return base64.stdencoding.encodetostring(crypted), nil
}
func pkcs5padding(ciphertext []byte, blocksize int) []byte {
 padding := blocksize - len(ciphertext)%blocksize
 //填充
 padtext := bytes.repeat([]byte{byte(padding)}, padding)
 return append(ciphertext, padtext...)
}
func aesdecrypt(decodestr string, key []byte) ([]byte, error) {
 //先解密base64
 decodebytes, err := base64.stdencoding.decodestring(decodestr)
 if err != nil {
  return nil, err
 }
 block, err := aes.newcipher(key)
 if err != nil {
  return nil, err
 }
 blockmode := cipher.newcbcdecrypter(block, []byte(iv))
 origdata := make([]byte, len(decodebytes))
 blockmode.cryptblocks(origdata, decodebytes)
 origdata = pkcs5unpadding(origdata)
 return origdata, nil
}
func pkcs5unpadding(origdata []byte) []byte {
 length := len(origdata)
 unpadding := int(origdata[length-1])
 return origdata[:(length - unpadding)]
}

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。如有错误或未考虑完全的地方，望不吝赐教。