微信小程序端主动获取用户手机号时需要后端把加密的数据解密才能得到用户手机号
需要注意的点：
1：key 密钥 前端每获取一次用户openid就会刷新一次。所以在解密数据前要保证密钥为最新的。
微信文档链接地址：
https://developers./miniprogram/dev/framework/open-ability/signature.html#加密数据解密算法
package mainimport ("crypto/aes""crypto/cipher""encoding/base64""encoding/json""fmt")// CBC 模式//解密/*** rawData 原始加密数据* key 密钥* iv 向量*/func Dncrypt(rawData, key, iv string) (string, error) {data, err := base64.StdEncoding.DecodeString(rawData)key_b, err_1 := base64.StdEncoding.DecodeString(key)iv_b, _ := base64.StdEncoding.DecodeString(iv)if err != nil {return "", err}if err_1 != nil {return "", err_1}dnData, err := AesCBCDncrypt(data, key_b, iv_b)if err != nil {return "", err}return string(dnData), nil}// 解密func AesCBCDncrypt(encryptData, key, iv []byte) ([]byte, error) {block, err := aes.NewCipher(key)if err != nil {panic(err)}blockSize := block.BlockSize()if len(encryptData) < blockSize {panic("ciphertext too short")}if len(encryptData)%blockSize != 0 {panic("ciphertext is not a multiple of the block size")}mode := cipher.NewCBCDecrypter(block, iv)mode.CryptBlocks(encryptData, encryptData)// 解填充encryptData = PKCS7UnPadding(encryptData)return encryptData, nil}//去除填充func PKCS7UnPadding(origData []byte) []byte {length := len(origData)unpadding := int(origData[length-1])return origData[:(length - unpadding)]}func main() {str := "****qU9A=="key := "******P5Y2b9SfejeA=="iv := "*****FLgzU09FtANlRw=="src, err := Dncrypt(str, key, iv)fmt.Println(err)var s = map[string]interface{}{}json.Unmarshal([]byte(src), &s)fmt.Printf("== %+v", src)fmt.Printf("cc== %+v", s)}
解密后的数据：
{"phoneNumber": "13580006666","purePhoneNumber": "13580006666","countryCode": "86","watermark":{"appid":"APPID","timestamp": TIMESTAMP}}
附一篇加解密的文章：//01/go%E5%8A%A0%E5%AF%86%E8%A7%A3%E5%AF%86%E4%B9%8Bdes/
