package com.dsh.communityWorldCup.util.wx;
|
|
import com.google.gson.*;
|
import com.google.gson.annotations.Expose;
|
import com.wechat.pay.java.core.util.GsonUtil;
|
import okhttp3.Headers;
|
import okhttp3.Response;
|
import okio.BufferedSource;
|
|
import javax.crypto.BadPaddingException;
|
import javax.crypto.Cipher;
|
import javax.crypto.IllegalBlockSizeException;
|
import javax.crypto.NoSuchPaddingException;
|
import java.io.IOException;
|
import java.io.UncheckedIOException;
|
import java.io.UnsupportedEncodingException;
|
import java.net.URLEncoder;
|
import java.nio.charset.StandardCharsets;
|
import java.nio.file.Files;
|
import java.nio.file.Paths;
|
import java.security.*;
|
import java.security.spec.InvalidKeySpecException;
|
import java.security.spec.PKCS8EncodedKeySpec;
|
import java.security.spec.X509EncodedKeySpec;
|
import java.time.DateTimeException;
|
import java.time.Duration;
|
import java.time.Instant;
|
import java.util.Base64;
|
import java.util.Map;
|
import java.util.Objects;
|
|
public class WXPayUtility {
|
private static final Gson gson = new GsonBuilder()
|
.disableHtmlEscaping()
|
.addSerializationExclusionStrategy(new ExclusionStrategy() {
|
@Override
|
public boolean shouldSkipField(FieldAttributes fieldAttributes) {
|
final Expose expose = fieldAttributes.getAnnotation(Expose.class);
|
return expose != null && !expose.serialize();
|
}
|
|
@Override
|
public boolean shouldSkipClass(Class<?> aClass) {
|
return false;
|
}
|
})
|
.addDeserializationExclusionStrategy(new ExclusionStrategy() {
|
@Override
|
public boolean shouldSkipField(FieldAttributes fieldAttributes) {
|
final Expose expose = fieldAttributes.getAnnotation(Expose.class);
|
return expose != null && !expose.deserialize();
|
}
|
|
@Override
|
public boolean shouldSkipClass(Class<?> aClass) {
|
return false;
|
}
|
})
|
.create();
|
private static final char[] SYMBOLS =
|
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
|
private static final SecureRandom random = new SecureRandom();
|
|
/**
|
* 将 Object 转换为 JSON 字符串
|
*/
|
public static String toJson(Object object) {
|
return gson.toJson(object);
|
}
|
|
/**
|
* 将 JSON 字符串解析为特定类型的实例
|
*/
|
public static <T> T fromJson(String json, Class<T> classOfT) throws JsonSyntaxException {
|
return gson.fromJson(json, classOfT);
|
}
|
|
/**
|
* 从公私钥文件路径中读取文件内容
|
*
|
* @param keyPath 文件路径
|
* @return 文件内容
|
*/
|
private static String readKeyStringFromPath(String keyPath) {
|
try {
|
return new String(Files.readAllBytes(Paths.get(keyPath)), StandardCharsets.UTF_8);
|
} catch (IOException e) {
|
throw new UncheckedIOException(e);
|
}
|
}
|
|
/**
|
* 读取 PKCS#8 格式的私钥字符串并加载为私钥对象
|
*
|
* @param keyString 私钥文件内容，以 -----BEGIN PRIVATE KEY----- 开头
|
* @return PrivateKey 对象
|
*/
|
public static PrivateKey loadPrivateKeyFromString(String keyString) {
|
try {
|
keyString = keyString.replace("-----BEGIN PRIVATE KEY-----", "")
|
.replace("-----END PRIVATE KEY-----", "")
|
.replaceAll("\\s+", "");
|
return KeyFactory.getInstance("RSA").generatePrivate(
|
new PKCS8EncodedKeySpec(Base64.getDecoder().decode(keyString)));
|
} catch (NoSuchAlgorithmException e) {
|
throw new UnsupportedOperationException(e);
|
} catch (InvalidKeySpecException e) {
|
throw new IllegalArgumentException(e);
|
}
|
}
|
|
/**
|
* 从 PKCS#8 格式的私钥文件中加载私钥
|
*
|
* @param keyPath 私钥文件路径
|
* @return PrivateKey 对象
|
*/
|
public static PrivateKey loadPrivateKeyFromPath(String keyPath) {
|
return loadPrivateKeyFromString(readKeyStringFromPath(keyPath));
|
}
|
|
/**
|
* 读取 PKCS#8 格式的公钥字符串并加载为公钥对象
|
*
|
* @param keyString 公钥文件内容，以 -----BEGIN PUBLIC KEY----- 开头
|
* @return PublicKey 对象
|
*/
|
public static PublicKey loadPublicKeyFromString(String keyString) {
|
try {
|
keyString = keyString.replace("-----BEGIN PUBLIC KEY-----", "")
|
.replace("-----END PUBLIC KEY-----", "")
|
.replaceAll("\\s+", "");
|
return KeyFactory.getInstance("RSA").generatePublic(
|
new X509EncodedKeySpec(Base64.getDecoder().decode(keyString)));
|
} catch (NoSuchAlgorithmException e) {
|
throw new UnsupportedOperationException(e);
|
} catch (InvalidKeySpecException e) {
|
throw new IllegalArgumentException(e);
|
}
|
}
|
|
/**
|
* 从 PKCS#8 格式的公钥文件中加载公钥
|
*
|
* @param keyPath 公钥文件路径
|
* @return PublicKey 对象
|
*/
|
public static PublicKey loadPublicKeyFromPath(String keyPath) {
|
return loadPublicKeyFromString(readKeyStringFromPath(keyPath));
|
}
|
|
/**
|
* 创建指定长度的随机字符串，字符集为[0-9a-zA-Z]，可用于安全相关用途
|
*/
|
public static String createNonce(int length) {
|
char[] buf = new char[length];
|
for (int i = 0; i < length; ++i) {
|
buf[i] = SYMBOLS[random.nextInt(SYMBOLS.length)];
|
}
|
return new String(buf);
|
}
|
|
/**
|
* 使用公钥按照 RSA_PKCS1_OAEP_PADDING 算法进行加密
|
*
|
* @param publicKey 加密用公钥对象
|
* @param plaintext 待加密明文
|
* @return 加密后密文
|
*/
|
public static String encrypt(PublicKey publicKey, String plaintext) {
|
final String transformation = "RSA/ECB/OAEPWithSHA-1AndMGF1Padding";
|
|
try {
|
Cipher cipher = Cipher.getInstance(transformation);
|
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
|
return Base64.getEncoder().encodeToString(cipher.doFinal(plaintext.getBytes(StandardCharsets.UTF_8)));
|
} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
|
throw new IllegalArgumentException("The current Java environment does not support " + transformation, e);
|
} catch (InvalidKeyException e) {
|
throw new IllegalArgumentException("RSA encryption using an illegal publicKey", e);
|
} catch (BadPaddingException | IllegalBlockSizeException e) {
|
throw new IllegalArgumentException("Plaintext is too long", e);
|
}
|
}
|
|
/**
|
* 使用私钥按照指定算法进行签名
|
*
|
* @param message 待签名串
|
* @param algorithm 签名算法，如 SHA256withRSA
|
* @param privateKey 签名用私钥对象
|
* @return 签名结果
|
*/
|
public static String sign(String message, String algorithm, PrivateKey privateKey) {
|
byte[] sign;
|
try {
|
Signature signature = Signature.getInstance(algorithm);
|
signature.initSign(privateKey);
|
signature.update(message.getBytes(StandardCharsets.UTF_8));
|
sign = signature.sign();
|
} catch (NoSuchAlgorithmException e) {
|
throw new UnsupportedOperationException("The current Java environment does not support " + algorithm, e);
|
} catch (InvalidKeyException e) {
|
throw new IllegalArgumentException(algorithm + " signature uses an illegal privateKey.", e);
|
} catch (SignatureException e) {
|
throw new RuntimeException("An error occurred during the sign process.", e);
|
}
|
return Base64.getEncoder().encodeToString(sign);
|
}
|
|
/**
|
* 使用公钥按照特定算法验证签名
|
*
|
* @param message 待签名串
|
* @param signature 待验证的签名内容
|
* @param algorithm 签名算法，如：SHA256withRSA
|
* @param publicKey 验签用公钥对象
|
* @return 签名验证是否通过
|
*/
|
public static boolean verify(String message, String signature, String algorithm,
|
PublicKey publicKey) {
|
try {
|
Signature sign = Signature.getInstance(algorithm);
|
sign.initVerify(publicKey);
|
sign.update(message.getBytes(StandardCharsets.UTF_8));
|
return sign.verify(Base64.getDecoder().decode(signature));
|
} catch (SignatureException e) {
|
return false;
|
} catch (InvalidKeyException e) {
|
throw new IllegalArgumentException("verify uses an illegal publickey.", e);
|
} catch (NoSuchAlgorithmException e) {
|
throw new UnsupportedOperationException("The current Java environment does not support" + algorithm, e);
|
}
|
}
|
|
/**
|
* 根据微信支付APIv3请求签名规则构造 Authorization 签名
|
*
|
* @param mchid 商户号
|
* @param certificateSerialNo 商户API证书序列号
|
* @param privateKey 商户API证书私钥
|
* @param method 请求接口的HTTP方法，请使用全大写表述，如 GET、POST、PUT、DELETE
|
* @param uri 请求接口的URL
|
* @param body 请求接口的Body
|
* @return 构造好的微信支付APIv3 Authorization 头
|
*/
|
public static String buildAuthorization(String mchid, String certificateSerialNo,
|
PrivateKey privateKey,
|
String method, String uri, String body) {
|
String nonce = createNonce(32);
|
long timestamp = Instant.now().getEpochSecond();
|
|
String message = String.format("%s\n%s\n%d\n%s\n%s\n", method, uri, timestamp, nonce,
|
body == null ? "" : body);
|
|
String signature = sign(message, "SHA256withRSA", privateKey);
|
|
return String.format(
|
"WECHATPAY2-SHA256-RSA2048 mchid=\"%s\",nonce_str=\"%s\",signature=\"%s\"," +
|
"timestamp=\"%d\",serial_no=\"%s\"",
|
mchid, nonce, signature, timestamp, certificateSerialNo);
|
}
|
|
/**
|
* 对参数进行 URL 编码
|
*
|
* @param content 参数内容
|
* @return 编码后的内容
|
*/
|
public static String urlEncode(String content) {
|
try {
|
return URLEncoder.encode(content, StandardCharsets.UTF_8.name());
|
} catch (UnsupportedEncodingException e) {
|
throw new RuntimeException(e);
|
}
|
}
|
|
/**
|
* 对参数Map进行 URL 编码，生成 QueryString
|
*
|
* @param params Query参数Map
|
* @return QueryString
|
*/
|
public static String urlEncode(Map<String, Object> params) {
|
if (params == null || params.isEmpty()) {
|
return "";
|
}
|
|
int index = 0;
|
StringBuilder result = new StringBuilder();
|
for (Map.Entry<String, Object> entry : params.entrySet()) {
|
result.append(entry.getKey())
|
.append("=")
|
.append(urlEncode(entry.getValue().toString()));
|
index++;
|
if (index < params.size()) {
|
result.append("&");
|
}
|
}
|
return result.toString();
|
}
|
|
/**
|
* 从应答中提取 Body
|
*
|
* @param response HTTP 请求应答对象
|
* @return 应答中的Body内容，Body为空时返回空字符串
|
*/
|
public static String extractBody(Response response) {
|
if (response.body() == null) {
|
return "";
|
}
|
|
try {
|
BufferedSource source = response.body().source();
|
return source.readUtf8();
|
} catch (IOException e) {
|
throw new RuntimeException(String.format("An error occurred during reading response body. Status: %d", response.code()), e);
|
}
|
}
|
|
/**
|
* 根据微信支付APIv3应答验签规则对应答签名进行验证，验证不通过时抛出异常
|
*
|
* @param wechatpayPublicKeyId 微信支付公钥ID
|
* @param wechatpayPublicKey 微信支付公钥对象
|
* @param headers 微信支付应答 Header 列表
|
* @param body 微信支付应答 Body
|
*/
|
public static void validateResponse(String wechatpayPublicKeyId, PublicKey wechatpayPublicKey,
|
Headers headers,
|
String body) {
|
String timestamp = headers.get("Wechatpay-Timestamp");
|
try {
|
Instant responseTime = Instant.ofEpochSecond(Long.parseLong(timestamp));
|
// 拒绝过期请求
|
if (Duration.between(responseTime, Instant.now()).abs().toMinutes() >= 5) {
|
throw new IllegalArgumentException(
|
String.format("Validate http response,timestamp[%s] of httpResponse is expires, "
|
+ "request-id[%s]",
|
timestamp, headers.get("Request-ID")));
|
}
|
} catch (DateTimeException | NumberFormatException e) {
|
throw new IllegalArgumentException(
|
String.format("Validate http response,timestamp[%s] of httpResponse is invalid, " +
|
"request-id[%s]", timestamp,
|
headers.get("Request-ID")));
|
}
|
String message = String.format("%s\n%s\n%s\n", timestamp, headers.get("Wechatpay-Nonce"),
|
body == null ? "" : body);
|
String serialNumber = headers.get("Wechatpay-Serial");
|
if (!Objects.equals(serialNumber, wechatpayPublicKeyId)) {
|
throw new IllegalArgumentException(
|
String.format("Invalid Wechatpay-Serial, Local: %s, Remote: %s", wechatpayPublicKeyId,
|
serialNumber));
|
}
|
String signature = headers.get("Wechatpay-Signature");
|
|
boolean success = verify(message, signature, "SHA256withRSA", wechatpayPublicKey);
|
if (!success) {
|
throw new IllegalArgumentException(
|
String.format("Validate response failed,the WechatPay signature is incorrect.%n"
|
+ "Request-ID[%s]\tresponseHeader[%s]\tresponseBody[%.1024s]",
|
headers.get("Request-ID"), headers, body));
|
}
|
}
|
|
/**
|
* 微信支付API错误异常，发送HTTP请求成功，但返回状态码不是 2XX 时抛出本异常
|
*/
|
public static class ApiException extends RuntimeException {
|
private static final long serialVersionUID = 2261086748874802175L;
|
|
private final int statusCode;
|
private final String body;
|
private final Headers headers;
|
private final String errorCode;
|
private final String errorMessage;
|
|
public ApiException(int statusCode, String body, Headers headers) {
|
super(String.format("微信支付API访问失败，StatusCode: [%s], Body: [%s], Headers: [%s]", statusCode, body, headers));
|
this.statusCode = statusCode;
|
this.body = body;
|
this.headers = headers;
|
|
if (body != null && !body.isEmpty()) {
|
JsonElement code;
|
JsonElement message;
|
|
try {
|
JsonObject jsonObject = GsonUtil.getGson().fromJson(body, JsonObject.class);
|
code = jsonObject.get("code");
|
message = jsonObject.get("message");
|
} catch (JsonSyntaxException ignored) {
|
code = null;
|
message = null;
|
}
|
this.errorCode = code == null ? null : code.getAsString();
|
this.errorMessage = message == null ? null : message.getAsString();
|
} else {
|
this.errorCode = null;
|
this.errorMessage = null;
|
}
|
}
|
|
/**
|
* 获取 HTTP 应答状态码
|
*/
|
public int getStatusCode() {
|
return statusCode;
|
}
|
|
/**
|
* 获取 HTTP 应答包体内容
|
*/
|
public String getBody() {
|
return body;
|
}
|
|
/**
|
* 获取 HTTP 应答 Header
|
*/
|
public Headers getHeaders() {
|
return headers;
|
}
|
|
/**
|
* 获取 错误码 （错误应答中的 code 字段）
|
*/
|
public String getErrorCode() {
|
return errorCode;
|
}
|
|
/**
|
* 获取 错误消息 （错误应答中的 message 字段）
|
*/
|
public String getErrorMessage() {
|
return errorMessage;
|
}
|
}
|
}
|
