🆕 #1706 微信支付增加特约商户进件相关接口

* 实现特约商户进件相关接口

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/v3/SpecEncrypt.java

@@ -0,0 +1,16 @@
+package com.github.binarywang.wxpay.v3;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * 敏感信息字段
+ * @author zhouyognshen
+ **/
+@Target({ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface SpecEncrypt {
+
+}

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/v3/util/RsaCryptoUtil.java

@@ -0,0 +1,99 @@
+package com.github.binarywang.wxpay.v3.util;
+
+import com.github.binarywang.wxpay.exception.WxPayException;
+import com.github.binarywang.wxpay.v3.SpecEncrypt;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import java.lang.reflect.Field;
+import java.nio.charset.StandardCharsets;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.cert.X509Certificate;
+import java.util.Base64;
+
+/**
+ * 微信支付敏感信息加密
+ * 文档见： https://wechatpay-api.gitbook.io/wechatpay-api-v3/qian-ming-zhi-nan-1/min-gan-xin-xi-jia-mi
+ *
+ * @author zhouyongshen
+ **/
+public class RsaCryptoUtil {
+
+
+  static String JAVA_LANG_STRING = "java.lang.String";
+
+  public static void encryptFields(Object encryptObject, X509Certificate certificate) throws WxPayException {
+    try {
+      encryptField(encryptObject, certificate);
+    } catch (IllegalAccessException | IllegalBlockSizeException e) {
+      throw new WxPayException("敏感信息加密失败", e);
+    } catch (Exception e2) {
+      throw new WxPayException("敏感信息加密失败", e2);
+    }
+  }
+
+  private static void encryptField(Object encryptObject, X509Certificate certificate) throws IllegalAccessException, IllegalBlockSizeException {
+    Class<?> infoClass = encryptObject.getClass();
+    Field[] infoFieldArray = infoClass.getDeclaredFields();
+    for (Field field : infoFieldArray) {
+      if (field.isAnnotationPresent(SpecEncrypt.class)) {
+        //字段使用了@SpecEncrypt进行标识
+        if (field.getType().getTypeName().equals(JAVA_LANG_STRING)) {
+          field.setAccessible(true);
+          Object oldValue = field.get(encryptObject);
+          if (oldValue != null) {
+            String oldStr = (String) oldValue;
+            if (!oldStr.trim().equals("'")) {
+              field.set(encryptObject, encryptOAEP(oldStr, certificate));
+            }
+          }
+        } else {
+          field.setAccessible(true);
+          Object obj = field.get(encryptObject);
+          if (obj != null) {
+            encryptField(field.get(encryptObject), certificate);
+          }
+        }
+      }
+    }
+  }
+
+  public static String encryptOAEP(String message, X509Certificate certificate)
+    throws IllegalBlockSizeException {
+    try {
+      Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWithSHA-1AndMGF1Padding");
+      cipher.init(Cipher.ENCRYPT_MODE, certificate.getPublicKey());
+
+      byte[] data = message.getBytes(StandardCharsets.UTF_8);
+      byte[] ciphertext = cipher.doFinal(data);
+      return Base64.getEncoder().encodeToString(ciphertext);
+    } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
+      throw new RuntimeException("当前Java环境不支持RSA v1.5/OAEP", e);
+    } catch (InvalidKeyException e) {
+      throw new IllegalArgumentException("无效的证书", e);
+    } catch (IllegalBlockSizeException | BadPaddingException e) {
+      throw new IllegalBlockSizeException("加密原串的长度不能超过214字节");
+    }
+  }
+
+  public static String decryptOAEP(String ciphertext, PrivateKey privateKey)
+    throws BadPaddingException {
+    try {
+      Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWithSHA-1AndMGF1Padding");
+      cipher.init(Cipher.DECRYPT_MODE, privateKey);
+
+      byte[] data = Base64.getDecoder().decode(ciphertext);
+      return new String(cipher.doFinal(data), StandardCharsets.UTF_8);
+    } catch (NoSuchPaddingException | NoSuchAlgorithmException e) {
+      throw new RuntimeException("当前Java环境不支持RSA v1.5/OAEP", e);
+    } catch (InvalidKeyException e) {
+      throw new IllegalArgumentException("无效的私钥", e);
+    } catch (BadPaddingException | IllegalBlockSizeException e) {
+      throw new BadPaddingException("解密失败");
+    }
+  }
+}