直接上代码：

    1. package main
    3. import (
    4.    "fmt"
    5.    "crypto/aes"
    6.    "crypto/cipher"
    7.    "encoding/base64"
    8.    "bytes"
    9. )
    11. const (
    12.    key = "X2bJDtJtM7IAmbpB"
    13.    iv  = "9338010611913253"
    14. )
    16. func main() {
    17.    str := "我勒个去"
    18.    es, _ := AesEncrypt(str, []byte(key))
    19.    fmt.Println(es)
    21.    ds, _ := AesDecrypt(es, []byte(key))
    22.    fmt.Println(string(ds))
    24. }
    26. func AesEncrypt(encodeStr string, key []byte) (string, error) {
    27.    encodeBytes := []byte(encodeStr)
    28.    //根据key 生成密文
    29.    block, err := aes.NewCipher(key)
    30.    if err != nil {
    31.       return "", err
    32.    }
    34.    blockSize := block.BlockSize()
    35.    encodeBytes = PKCS5Padding(encodeBytes, blockSize)
    37.    blockMode := cipher.NewCBCEncrypter(block, []byte(iv))
    38.    crypted := make([]byte, len(encodeBytes))
    39.    blockMode.CryptBlocks(crypted, encodeBytes)
    41.    return base64.StdEncoding.EncodeToString(crypted), nil
    42. }
    44. func PKCS5Padding(ciphertext []byte, blockSize int) []byte {
    45.    padding := blockSize - len(ciphertext)%blockSize
    46.    //填充
    47.    padtext := bytes.Repeat([]byte{byte(padding)}, padding)
    49.    return append(ciphertext, padtext...)
    50. }
    52. func AesDecrypt(decodeStr string, key []byte) ([]byte, error) {
    53.    //先解密base64
    54.    decodeBytes, err := base64.StdEncoding.DecodeString(decodeStr)
    55.    if err != nil {
    56.       return nil, err
    57.    }
    58.    block, err := aes.NewCipher(key)
    59.    if err != nil {
    60.       return nil, err
    61.    }
    62.    blockMode := cipher.NewCBCDecrypter(block, []byte(iv))
    63.    origData := make([]byte, len(decodeBytes))
    65.    blockMode.CryptBlocks(origData, decodeBytes)
    66.    origData = PKCS5UnPadding(origData)
    67.    return origData, nil
    68. }
    70. func PKCS5UnPadding(origData []byte) []byte {
    71.    length := len(origData)
    72.    unpadding := int(origData[length-1])
    73.    return origData[:(length - unpadding)]
    74. }