微信小程序获取手机号报BadPaddingException: Given final block not properly padded. Such issues can 解决办法

微信小程序获取手机号报BadPaddingException: Given final block not properly padded. Such issues can 解决办法

1. 原因是code被使用了2次

一. 解决办法就是先获取 wx.login获取code去后台换取session_key和openid

前端代码

var that = this;
wx.login({
success(res) {
console.log(res);
var code = res.code
wx.request({
url: 'http://localhost/api/sysMain/code2seesion',
method: "post",
data: {
code
},
success: function (res) {
console.log(res.data.openid);
that.setData(res.data);
}
})
}
})

后端代码根据前端传过来的code获取session_key

 @ApiOperation(value = "小程序获取sessionkey和openid", response = LoginUserInfo.class)
@PostMapping("/code2seesion")
public JSONResult code2seesion(@Validated(MiniLoginUserReq.select.class) @RequestBody MiniLoginUserReq miniReq, HttpServletRequest request) throws SocketException, UnknownHostException {
String wxspAppid = "wx495b052b1493a85d";
String wxspSecret = "deb47184676634236f9a88bd51878717";
if (miniReq.getCode() == null){
return JSONResult.errorMsg("code不能为空");
}
try {
// 授权（必填）
String grant_type = "authorization_code";
// 请求参数
String params = "appid=" + wxspAppid + "&secret=" + wxspSecret + "&js_code=" + miniReq.getCode() + "&grant_type="
+ grant_type;
// 发送请求
String sr = HttpRequest.sendPost("https://api.weixin.qq.com/sns/jscode2session", params);
JSONObject json = JSONObject.parseObject(sr);
return JSONResult.ok(json);
} catch (Exception e) {
e.printStackTrace();
return JSONResult.errorMsg(e.toString());
}
}

实体类

@Data
@AllArgsConstructor
@NoArgsConstructor
@ApiModel("登录请求参数")
public class MiniLoginUserReq {
@ApiModelProperty("手机号")
private String candidatePhone;
@ApiModelProperty("code")
private String code;
@ApiModelProperty("终端类型 1web 2app 3pc客户端")
private Integer terminalType;
@ApiModelProperty("设备序列号")
private String equNumber;
@ApiModelProperty("经纬度坐标")
private String GPS;
@ApiModelProperty("被加密的数据")
private String encryptedData;
@ApiModelProperty("偏移量")
private String iv;
@ApiModelProperty("sessionKey")
private String sessionKey;
@ApiModelProperty("openid")
private String openid;
}

第二步前端把session_key传个后端换取手机号码
前端代码
~获取手机号是有特殊按钮类型

<button open-type="getPhoneNumber" bindgetphonenumber="getPhoneNumber">获取手机号</button>

getPhoneNumber: function (e) {
var that = this;
console.log(e.detail.errMsg == "getPhoneNumber:ok");
if (e.detail.errMsg == "getPhoneNumber:ok") {
wx.request({
url: 'http://localhost/api/sysMain/miniLogin',
data: {
encryptedData: e.detail.encryptedData,
iv: e.detail.iv,
sessionKey: that.data.session_key,
uid: "",
},
method: "post",
success: function (res) {
console.log(res);
}
})
}
},

后端代码

@ApiOperation(value = "小程序登录接口根据session_key和openid获取用户信息", response = LoginUserInfo.class)
@PostMapping("/miniLogin")
public JSONResult miniLogin(@Validated(MiniLoginUserReq.select.class) @RequestBody MiniLoginUserReq miniReq, HttpServletRequest request) throws SocketException, UnknownHostException {
if (miniReq.getOpenid()== null){
return JSONResult.errorMsg("Openid不能为空");
}
try {
//解密后的JSON数据
String result=AesCbcUtil.decrypt(miniReq.getEncryptedData(),miniReq.getSessionKey(),miniReq.getIv());
JSONObject obj=JSONObject.parseObject(result);
String candidatePhone = obj.getString("purePhoneNumber");//微信的手机号码
//下面就是走自己的servic根据手机号码换取用户信息
return sysMainService.userMiniLogin(candidatePhone);
} catch (Exception e) {
e.printStackTrace();
return JSONResult.errorMsg(e.toString());
}
}

java解密

public class AesCbcUtil {
/* static {
//BouncyCastle是一个开源的加解密解决方案，主页在http://www.bouncycastle.org/
Security.addProvider(new BouncyCastleProvider());
}*/
/**
* AES解密
*
* @param data
//密文，被加密的数据
* @param key
//秘钥
* @param iv
//偏移量
* @return
* @throws Exception
*/
public static String decrypt(String data, String key,String iv){
//被加密的数据
byte[] dataByte = Base64.decodeBase64(data);
//加密秘钥
byte[] keyByte = Base64.decodeBase64(key);
//偏移量
byte[] ivByte = Base64.decodeBase64(iv);
AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivByte);
int base = 16;
if (keyByte.length % base != 0) {
int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
byte[] temp = new byte[groups * base];
Arrays.fill(temp, (byte) 0);
System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
keyByte = temp;
}
try {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
SecretKeySpec keySpec = new SecretKeySpec(keyByte, "AES");
cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
return new String(cipher.doFinal(dataByte),"UTF-8");
} catch (Exception e) {
try {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
SecretKeySpec keySpec = new SecretKeySpec(keyByte, "AES");
cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
return new String(cipher.doFinal(dataByte),"UTF-8");
}catch (Exception e1){
e1.printStackTrace();
}
}
return null;
}
}

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