/// <summary>
/// 加密敏感信息字段
/// </summary>
/// <remarks>
/// <para><a href="https://pay.weixin.qq.com/wiki/doc/apiv3/wechatpay/wechatpay4_3.shtml">敏感信息加解密</a></para>
/// </remarks>
private static void EncryptPrivacyProperty(WeChatPayObject obj, RSA rsa)
{
foreach (var propertyInfo in obj.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (propertyInfo.PropertyType == typeof(string)) // 为string类型
{
if (propertyInfo.IsDefined(typeof(WeChatPayPrivacyPropertyAttribute), false)) // 是否标记为敏感信息
{
var value = propertyInfo.GetValue(obj, null); // 获取值
if (value is string strValue)
{
if (string.IsNullOrEmpty(strValue))
{
continue; // 跳过空字符串
}
// 加密并将加密串设置回对象
var strEncrypted = OaepSHA1WithRSA.Encrypt(rsa, strValue);
propertyInfo.SetValue(obj, strEncrypted, null);
}
}
}
else if (propertyInfo.PropertyType.IsClass)
{
var value = propertyInfo.GetValue(obj, null); // 获取子对象
if (value is null)
{
continue; // 跳过空值
}
if (value is WeChatPayObject weChatPayObject)
{
EncryptPrivacyProperty(weChatPayObject, rsa); // 继续加密
}
else if (value is IList list) // 获取列表对象
{
foreach (var item in list)
{
if (item is WeChatPayObject wcpObj)
{
EncryptPrivacyProperty(wcpObj, rsa); // 继续加密
}
else
{
break;
}
}
}
else
{
continue; // 跳过其他类型
}
}
}
}
public void PrimaryHandler(WeChatPayDictionary sortedTxtParams, WeChatPayOptions options)
{
if (string.IsNullOrEmpty(options.RsaPublicKey))
{
throw new WeChatPayException($"{nameof(WeChatPayPayBankRequest)}.{nameof(PrimaryHandler)}: {nameof(options.RsaPublicKey)} is empty!");
}
sortedTxtParams.Add(WeChatPayConsts.nonce_str, WeChatPayUtility.GenerateNonceStr());
sortedTxtParams.Add(WeChatPayConsts.mch_id, options.MchId);
sortedTxtParams.Add(WeChatPayConsts.enc_bank_no, OaepSHA1WithRSA.Encrypt(BankNo, options.RsaPublicKey));
sortedTxtParams.Add(WeChatPayConsts.enc_true_name, OaepSHA1WithRSA.Encrypt(TrueName, options.RsaPublicKey));
sortedTxtParams.Add(WeChatPayConsts.sign, WeChatPaySignature.SignWithKey(sortedTxtParams, options.APIKey, signType));
}
/// <summary>
/// 加密敏感信息字段
/// </summary>
/// <remarks>
/// <para><a href="https://pay.weixin.qq.com/wiki/doc/apiv3/wechatpay/wechatpay4_3.shtml">敏感信息加解密</a></para>
/// </remarks>
private static void EncryptPrivacyProperty(object obj, RSA rsa)
{
foreach (var prop in obj.GetType().GetProperties())
{
if (prop.PropertyType == typeof(string)) // 为string类型
{
var val = prop.GetValue(obj, null); // 获取值
if (val is null) // 跳过空值
{
continue;
}
if (prop.IsDefined(typeof(WeChatPayPrivacyPropertyAttribute), false)) // 是否标记为敏感信息
{
if (val is string str)
{
if (string.IsNullOrEmpty(str)) // 跳过空字符串
{
continue;
}
// 加密并将加密串设置回对象。
var encStr = OaepSHA1WithRSA.Encrypt(rsa, str);
prop.SetValue(obj, encStr, null);
}
}
}
else if (prop.PropertyType.IsClass)
{
var subObj = prop.GetValue(obj, null); // 获取子对象
if (subObj is null) // 跳过空值
{
continue;
}
if (subObj is not WeChatPayObject) // 跳过除WeChatPayObject和基类为WeChatPayObject以外的一切类型。
{
continue;
}
EncryptPrivacyProperty(subObj, rsa); // 继续加密子对象
}
}
}
public void PrimaryHandler(WeChatPayOptions options, WeChatPaySignType signType, WeChatPayDictionary sortedTxtParams)
{
if (string.IsNullOrEmpty(options.RsaPublicKey))
{
throw new WeChatPayException("WeChatPayPayBankRequest: RsaPublicKey is null!");
}
sortedTxtParams.Add(WeChatPayConsts.nonce_str, WeChatPayUtility.GenerateNonceStr());
sortedTxtParams.Add(WeChatPayConsts.mch_id, options.MchId);
var no = OaepSHA1WithRSA.Encrypt(sortedTxtParams.GetValue(WeChatPayConsts.enc_bank_no), options.RsaPublicKey);
sortedTxtParams.SetValue(WeChatPayConsts.enc_bank_no, no);
var name = OaepSHA1WithRSA.Encrypt(sortedTxtParams.GetValue(WeChatPayConsts.enc_true_name), options.RsaPublicKey);
sortedTxtParams.SetValue(WeChatPayConsts.enc_true_name, name);
sortedTxtParams.Add(WeChatPayConsts.sign, WeChatPaySignature.SignWithKey(sortedTxtParams, options.Key, signType));
}