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com.alipay.v3.util.AlipayConfigUtil Maven / Gradle / Ivy
/**
* Alipay.com Inc.
* Copyright (c) 2004-2022 All Rights Reserved.
*/
package com.alipay.v3.util;
import com.alipay.v3.ApiException;
import com.google.common.base.Strings;
import org.bouncycastle.util.encoders.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.ByteArrayOutputStream;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
/**
* @author jishupei.jsp
* @version : AlipayConfigUtil, v0.1 2022年06月17日 11:21 上午 jishupei.jsp Exp $
*/
public class AlipayConfigUtil {
/**
* 开放平台上创建的应用的ID
*/
private String appId;
/**
* 字符串编码，推荐：utf-8
*/
private String charset = "utf-8";
/**
* 商户私钥
*/
private String privateKey;
/**
* 支付宝公钥字符串（公钥模式下设置，证书模式下无需设置）
*/
private String alipayPublicKey;
/**
* 支付宝根证书内容
*/
private String rootCertContent;
/**
* 支付宝根证书序列号
*/
private String rootCertSN;
/**
* 商户应用公钥证书序列号
*/
private String appCertSN;
/**
* 缓存的不同支付宝公钥证书序列号对应的支付宝公钥
*/
private ConcurrentHashMap cachedAlipayPublicKey = new ConcurrentHashMap();
/**
* 敏感信息对称加密算法类型，推荐：AES
*/
private String encryptType = "AES";
/**
* 敏感信息对称加密算法密钥
*/
private String encryptKey;
/**
* RSA2对应的真实非对称加密算法名称
*/
public static final String RSA = "RSA";
/**
* RSA2对应的真实签名算法名称
*/
public static final String SHA_256_WITH_RSA = "SHA256WithRSA";
public static final String ALIPAY_SHA_256_WITH_RSA = "ALIPAY-SHA256withRSA";
private static final String AES_ALG = "AES";
private static final String AES_CBC_PCK_ALG = "AES/CBC/PKCS5Padding";
private static final byte[] AES_IV = initIV();
/**
* RSA2最大加密明文大小(2048/8-11=244)
*/
private static final int MAX_ENCRYPT_BLOCK_SIZE = 244;
/**
* RSA2最大解密密文大小(2048/8=256)
*/
private static final int MAX_DECRYPT_BLOCK_SIZE = 256;
/**
* 计算签名并添加header
*
* @param httpMethod 本次请求的http方法
* @param httpRequestUri 本次请求的uri信息（不包括域名）
* @param httpRequestBody 本次请求的body内容，body为空时按空字符串处理，即""
* @param headerParams header
*/
public void sign(String httpMethod, String httpRequestUri, String httpRequestBody, Map headerParams) throws ApiException {
if (Strings.isNullOrEmpty(this.privateKey)) {
throw new ApiException("私钥[privateKey]不可为空");
}
String appAuthToken = headerParams.get("alipay-app-auth-token");
String nonce = UUID.randomUUID().toString();
String timestamp = String.valueOf(System.currentTimeMillis());
String authString = "app_id=" + this.appId
+ (Strings.isNullOrEmpty(this.appCertSN) ? "" : ",app_cert_sn=" + this.appCertSN)
+ ",nonce=" + nonce
+ ",timestamp=" + timestamp;
String content = authString + "\n"
+ httpMethod + "\n"
+ httpRequestUri + "\n"
+ (Strings.isNullOrEmpty(httpRequestBody) ? "" : httpRequestBody) + "\n"
+ (Strings.isNullOrEmpty(appAuthToken) ? "" : appAuthToken + "\n");
headerParams.put("Authorization", ALIPAY_SHA_256_WITH_RSA + " " + authString
+ ",sign=" + generateSign(content));
if (!Strings.isNullOrEmpty(this.rootCertSN)) {
headerParams.put("alipay-root-cert-sn", this.rootCertSN);
}
}
public String generateSign(String content) throws ApiException {
try {
byte[] encodedKey = this.privateKey.getBytes();
encodedKey = Base64.decode(encodedKey);
PrivateKey priKey = KeyFactory.getInstance(RSA).generatePrivate(new PKCS8EncodedKeySpec(encodedKey));
Signature signature = Signature.getInstance(SHA_256_WITH_RSA);
signature.initSign(priKey);
signature.update(content.getBytes(this.charset));
byte[] signed = signature.sign();
return new String(Base64.encode(signed));
} catch (Exception e) {
String errorMessage = "签名遭遇异常，请检查私钥格式是否正确。content=" + content + " privateKeySize=" + this.privateKey.length() + " reason=" + e.getMessage();
throw new ApiException(errorMessage);
}
}
/**
* 验证签名
*
* @param content 待验签的内容
* @param sign 签名值的Base64串
* @param alipayCertSN 支付宝公钥证书序列号
* @param timestamp 时间戳
* @param nonce nonce
* @return true：验证成功；false：验证失败
*/
public boolean verify(String content, String sign, String alipayCertSN, String timestamp, String nonce) throws ApiException {
String alipayPublicKey = this.alipayPublicKey;
if (!Strings.isNullOrEmpty(this.appCertSN)) {//证书模式
alipayPublicKey = getAlipayPublicKey(alipayCertSN);
}
if (Strings.isNullOrEmpty(alipayPublicKey)) {
throw new ApiException("公钥不可为空");
}
// if (Strings.isNullOrEmpty(content)) {
// throw new ApiException("sign check fail: Body is Empty!");
// }
content = timestamp + "\n"
+ nonce + "\n"
+ (content == null ? "" : content) + "\n";
return generateVerify(content, sign, alipayPublicKey);
}
public boolean generateVerify(String content, String sign, String alipayPublicKey) throws ApiException {
try {
KeyFactory keyFactory = KeyFactory.getInstance(RSA);
byte[] encodedKey = alipayPublicKey.getBytes();
encodedKey = Base64.decode(encodedKey);
PublicKey publicKey = keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey));
Signature signature = Signature.getInstance(SHA_256_WITH_RSA);
signature.initVerify(publicKey);
signature.update(content.getBytes(this.charset));
return signature.verify(Base64.decode(sign.getBytes()));
} catch (Exception e) {
String errorMessage = "验签遭遇异常，请检查公钥格式或签名是否正确。content=" + content + " sign=" + sign +
" publicKey=" + alipayPublicKey + " reason=" + e.getMessage();
throw new ApiException(errorMessage);
}
}
private String getAlipayPublicKey(String sn) throws ApiException {
//如果没有指定sn，则默认取缓存中的第一个值
if (Strings.isNullOrEmpty(sn)) {
return cachedAlipayPublicKey.values().iterator().next();
}
if (cachedAlipayPublicKey.containsKey(sn)) {
return cachedAlipayPublicKey.get(sn);
} else {
//网关在支付宝公钥证书变更前，一定会确认通知到商户并在商户做出反馈后，才会更新该商户的支付宝公钥证书
//TODO: 后续可以考虑加入自动升级支付宝公钥证书逻辑，注意并发更新冲突问题
throw new ApiException("支付宝公钥证书[" + sn + "]已过期，请重新下载最新支付宝公钥证书并替换原证书文件");
}
}
/**
* AES加密
*
* @param plainText 明文
* @param headerParams The header parameters
* @return 密文
*/
public String encrypt(String plainText, Map headerParams) throws ApiException {
if (Strings.isNullOrEmpty(this.encryptKey)) {
return plainText;
}
if (!"AES".equals(this.encryptType)) {
throw new ApiException("当前不支持该算法类型：encryptType=" + this.encryptType);
}
headerParams.put("alipay-encrypt-type", this.encryptType);
//除文件上传接口，加密后Content-Type均为"text/plain"
String contentType = headerParams.get("Content-Type");
if (!"multipart/form-data".equals(contentType)) {
headerParams.put("Content-Type", "text/plain");
}
if (Strings.isNullOrEmpty(plainText)) {
return null;
}
try {
Cipher cipher = Cipher.getInstance(AES_CBC_PCK_ALG);
IvParameterSpec iv = new IvParameterSpec(AES_IV);
cipher.init(Cipher.ENCRYPT_MODE,
new SecretKeySpec(Base64.decode(this.encryptKey.getBytes()), AES_ALG), iv);
byte[] encryptBytes = cipher.doFinal(plainText.getBytes(this.charset));
return new String(Base64.encode(encryptBytes));
} catch (Exception e) {
throw new ApiException("AES加密失败，plainText=" + plainText +
"，keySize=" + this.encryptKey.length() + "。" + e.getMessage());
}
}
/**
* 密文
*
* @param cipherText 密文
* @return 明文
*/
public String decrypt(String cipherText) throws ApiException {
if (Strings.isNullOrEmpty(this.encryptKey)) {
return cipherText;
}
if (!"AES".equals(this.encryptType)) {
throw new ApiException("当前不支持该算法类型：encrypeType=" + this.encryptType);
}
if (Strings.isNullOrEmpty(cipherText)) {
return null;
}
try {
Cipher cipher = Cipher.getInstance(AES_CBC_PCK_ALG);
IvParameterSpec iv = new IvParameterSpec(AES_IV);
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(Base64.decode(this.encryptKey.getBytes()), AES_ALG), iv);
byte[] cleanBytes = cipher.doFinal(Base64.decode(cipherText.getBytes()));
return new String(cleanBytes, this.charset);
} catch (Exception e) {
throw new ApiException("AES解密失败，cipherText=" + cipherText +
"，keySize=" + this.encryptKey.length() + "。" + e.getMessage());
}
}
/**
* 私钥解密
*
* @param cipherTextBase64
* @return
*/
public String doDecrypt(String cipherTextBase64) throws ApiException {
try {
byte[] encodedKey = this.privateKey.getBytes();
encodedKey = Base64.decode(encodedKey);
PrivateKey privateKey = KeyFactory.getInstance(RSA).generatePrivate(new PKCS8EncodedKeySpec(encodedKey));
Cipher cipher = Cipher.getInstance(RSA);
cipher.init(Cipher.DECRYPT_MODE, privateKey);
byte[] encryptedData = Base64.decode(cipherTextBase64.getBytes(charset));
int inputLen = encryptedData.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段解密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_DECRYPT_BLOCK_SIZE) {
cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK_SIZE);
} else {
cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_DECRYPT_BLOCK_SIZE;
}
byte[] decryptedData = out.toByteArray();
out.close();
return new String(decryptedData, charset);
} catch (Exception e) {
String errorMessage = "RSA2非对称解密遭遇异常，请检查私钥格式是否正确。cipherTextBase64=" + cipherTextBase64 + " privateKeySize=" + this.privateKey.length() + " reason=" + e.getMessage();
throw new ApiException(errorMessage);
}
}
/**
* 公钥加密
*
* @param plainText
* @return
*/
public String doEncrypt(String plainText) throws ApiException {
try {
KeyFactory keyFactory = KeyFactory.getInstance(RSA);
byte[] encodedKey = alipayPublicKey.getBytes();
encodedKey = Base64.decode(encodedKey);
PublicKey publicKey = keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey));
Cipher cipher = Cipher.getInstance(RSA);
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
byte[] data = plainText.getBytes(charset);
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段加密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK_SIZE) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK_SIZE);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK_SIZE;
}
byte[] encryptedData = Base64.encode(out.toByteArray());
out.close();
return new String(encryptedData, charset);
} catch (Exception e) {
String errorMessage = "RSA2非对称加密遭遇异常，请检查公钥格式是否正确。plainText=" + plainText +
" publicKey=" + alipayPublicKey + " reason=" + e.getMessage();
throw new ApiException(errorMessage);
}
}
/**
* 初始向量的方法，全部为0
* 这里的写法适合于其它算法，AES算法IV值一定是128位的(16字节)
*/
private static byte[] initIV() {
try {
Cipher cipher = Cipher.getInstance(AES_CBC_PCK_ALG);
int blockSize = cipher.getBlockSize();
byte[] iv = new byte[blockSize];
for (int i = 0; i < blockSize; ++i) {
iv[i] = 0;
}
return iv;
} catch (Exception e) {
int blockSize = 16;
byte[] iv = new byte[blockSize];
for (int i = 0; i < blockSize; ++i) {
iv[i] = 0;
}
return iv;
}
}
/**
* Getter method for property appId .
*
* @return property value of appId
*/
public String getAppId() {
return appId;
}
/**
* Setter method for property appId .
*
* @param appId value to be assigned to property appId
*/
public void setAppId(String appId) {
this.appId = appId;
}
/**
* Getter method for property charset .
*
* @return property value of charset
*/
public String getCharset() {
return charset;
}
/**
* Setter method for property charset .
*
* @param charset value to be assigned to property charset
*/
public void setCharset(String charset) {
this.charset = charset;
}
/**
* Getter method for property privateKey .
*
* @return property value of privateKey
*/
public String getPrivateKey() {
return privateKey;
}
/**
* Setter method for property privateKey .
*
* @param privateKey value to be assigned to property privateKey
*/
public void setPrivateKey(String privateKey) {
this.privateKey = privateKey;
}
/**
* Getter method for property alipayPublicKey .
*
* @return property value of alipayPublicKey
*/
public String getAlipayPublicKey() {
return alipayPublicKey;
}
/**
* Setter method for property alipayPublicKey .
*
* @param alipayPublicKey value to be assigned to property alipayPublicKey
*/
public void setAlipayPublicKey(String alipayPublicKey) {
this.alipayPublicKey = alipayPublicKey;
}
/**
* Getter method for property rootCertContent .
*
* @return property value of rootCertContent
*/
public String getRootCertContent() {
return rootCertContent;
}
/**
* Setter method for property rootCertContent .
*
* @param rootCertContent value to be assigned to property rootCertContent
*/
public void setRootCertContent(String rootCertContent) {
this.rootCertContent = rootCertContent;
}
/**
* Getter method for property rootCertSN .
*
* @return property value of rootCertSN
*/
public String getRootCertSN() {
return rootCertSN;
}
/**
* Setter method for property rootCertSN .
*
* @param rootCertSN value to be assigned to property rootCertSN
*/
public void setRootCertSN(String rootCertSN) {
this.rootCertSN = rootCertSN;
}
/**
* Getter method for property appCertSN .
*
* @return property value of appCertSN
*/
public String getAppCertSN() {
return appCertSN;
}
/**
* Setter method for property appCertSN .
*
* @param appCertSN value to be assigned to property appCertSN
*/
public void setAppCertSN(String appCertSN) {
this.appCertSN = appCertSN;
}
/**
* Getter method for property cachedAlipayPublicKey .
*
* @return property value of cachedAlipayPublicKey
*/
public ConcurrentHashMap getCachedAlipayPublicKey() {
return cachedAlipayPublicKey;
}
/**
* Setter method for property cachedAlipayPublicKey .
*
* @param cachedAlipayPublicKey value to be assigned to property cachedAlipayPublicKey
*/
public void setCachedAlipayPublicKey(ConcurrentHashMap cachedAlipayPublicKey) {
this.cachedAlipayPublicKey = cachedAlipayPublicKey;
}
/**
* Getter method for property encryptType .
*
* @return property value of encryptType
*/
public String getEncryptType() {
return encryptType;
}
/**
* Setter method for property encryptType .
*
* @param encryptType value to be assigned to property encryptType
*/
public void setEncryptType(String encryptType) {
this.encryptType = encryptType;
}
/**
* Getter method for property encryptKey .
*
* @return property value of encryptKey
*/
public String getEncryptKey() {
return encryptKey;
}
/**
* Setter method for property encryptKey .
*
* @param encryptKey value to be assigned to property encryptKey
*/
public void setEncryptKey(String encryptKey) {
this.encryptKey = encryptKey;
}
}
