fix(pay): 修复支付宝证书模式的签名验证

- 修改 AbstractAlipayPayClient 类中的签名验证逻辑
- 使用 cert.getPublicKey().getEncoded() 替代 cert.getEncoded() 获取公钥
-确保在证书模式下能够正确验证签名

yudao-module-pay/yudao-module-pay-server/src/main/java/cn/iocoder/yudao/module/pay/framework/pay/core/client/impl/alipay/AbstractAlipayPayClient.java

@@ -1,5 +1,28 @@
 package cn.iocoder.yudao.module.pay.framework.pay.core.client.impl.alipay;
 
+import static cn.hutool.core.date.DatePattern.NORM_DATETIME_FORMATTER;
+import static cn.iocoder.yudao.module.pay.framework.pay.core.client.impl.alipay.AlipayPayClientConfig.MODE_CERTIFICATE;
+import static cn.iocoder.yudao.module.pay.framework.pay.core.client.impl.alipay.AlipayPayClientConfig.MODE_PUBLIC_KEY;
+
+import java.nio.charset.StandardCharsets;
+import java.security.cert.X509Certificate;
+import java.time.LocalDateTime;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Supplier;
+
+import com.alipay.api.AlipayApiException;
+import com.alipay.api.AlipayConfig;
+import com.alipay.api.AlipayResponse;
+import com.alipay.api.DefaultAlipayClient;
+import com.alipay.api.domain.*;
+import com.alipay.api.internal.util.AlipaySignature;
+import com.alipay.api.internal.util.AntCertificationUtil;
+import com.alipay.api.internal.util.codec.Base64;
+import com.alipay.api.request.*;
+import com.alipay.api.response.*;
+
 import cn.hutool.core.bean.BeanUtil;
 import cn.hutool.core.date.LocalDateTimeUtil;
 import cn.hutool.core.lang.Assert;
@@ -16,32 +39,10 @@ import cn.iocoder.yudao.module.pay.framework.pay.core.client.dto.refund.PayRefun
 import cn.iocoder.yudao.module.pay.framework.pay.core.client.dto.transfer.PayTransferRespDTO;
 import cn.iocoder.yudao.module.pay.framework.pay.core.client.dto.transfer.PayTransferUnifiedReqDTO;
 import cn.iocoder.yudao.module.pay.framework.pay.core.client.impl.AbstractPayClient;
-import com.alipay.api.AlipayApiException;
-import com.alipay.api.AlipayConfig;
-import com.alipay.api.AlipayResponse;
-import com.alipay.api.DefaultAlipayClient;
-import com.alipay.api.domain.*;
-import com.alipay.api.internal.util.AlipaySignature;
-import com.alipay.api.internal.util.AntCertificationUtil;
-import com.alipay.api.internal.util.codec.Base64;
-import com.alipay.api.request.*;
-import com.alipay.api.response.*;
 import lombok.Getter;
 import lombok.SneakyThrows;
 import lombok.extern.slf4j.Slf4j;
 
-import java.nio.charset.StandardCharsets;
-import java.security.cert.X509Certificate;
-import java.time.LocalDateTime;
-import java.util.Collections;
-import java.util.Map;
-import java.util.Objects;
-import java.util.function.Supplier;
-
-import static cn.hutool.core.date.DatePattern.NORM_DATETIME_FORMATTER;
-import static cn.iocoder.yudao.module.pay.framework.pay.core.client.impl.alipay.AlipayPayClientConfig.MODE_CERTIFICATE;
-import static cn.iocoder.yudao.module.pay.framework.pay.core.client.impl.alipay.AlipayPayClientConfig.MODE_PUBLIC_KEY;
-
 /**
  * 支付宝抽象类，实现支付宝统一的接口、以及部分实现（退款）
  *
@@ -353,7 +354,7 @@ public abstract class AbstractAlipayPayClient extends AbstractPayClient<AlipayPa
         } else if (Objects.equals(config.getMode(), MODE_CERTIFICATE)) {
             // 由于 rsaCertCheckV1 的第二个参数是 path，所以不能这么调用！！！通过阅读源码，发现可以采用如下方式！
             X509Certificate cert = AntCertificationUtil.getCertFromContent(config.getAlipayPublicCertContent());
-            String publicKey = Base64.encodeBase64String(cert.getEncoded());
+            String publicKey = Base64.encodeBase64String(cert.getPublicKey().getEncoded());
             verify = AlipaySignature.rsaCheckV1(params, publicKey,
                     StandardCharsets.UTF_8.name(), config.getSignType());
         } else {