/// <summary>
/// 3DES解密
/// </summary>
/// <param name="pKey">解密密钥</param>
/// <param name="pDecryptContent">需要解密的内容</param>
/// <returns></returns>
public static byte[] TripleDESDecrypt(string pKey, string pDecryptContent)
{
byte[] keyBytes = Encoding.UTF8.GetBytes(pKey);
byte[] contentBytes = Encoding.UTF8.GetBytes(pDecryptContent);
return(EncDecUtil.TripleDESDecrypt(keyBytes, contentBytes));
}
/// <summary>
/// 解析请求报文
/// <remarks>
/// <para>请求报文是支付前置发给商户平台的,用于通知API</para>
/// </remarks>
/// </summary>
/// <param name="pCertFilePath">cer证书文件路径</param>
/// <param name="pCertFilePassword">pfx证书文件密码</param>
/// <param name="pRequestContent">加密后的请求内容</param>
/// <returns></returns>
public static string ParseRequestPackets(string pCerFilePath, string pRequestContent)
{
//参数检查
if (string.IsNullOrWhiteSpace(pRequestContent))
{
return(null);
}
var content = pRequestContent.Replace("\0", string.Empty);
if (string.IsNullOrWhiteSpace(content))
{
return(null);
}
//
string[] sections = content.Split(new char[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
if (sections.Length != 3)
{
throw new ArgumentException("格式非法的报文.");
}
string merchantID = Encoding.UTF8.GetString(EncDecUtil.Base64Decrypt(sections[0]));
byte[] encryptedKey = EncDecUtil.Base64Decrypt(sections[1]);
string desKey = Encoding.UTF8.GetString(EncDecUtil.RSADecrypt(pCerFilePath, encryptedKey));
byte[] key = Encoding.ASCII.GetBytes(desKey.Substring(0, 24));
byte[] keyIV = Encoding.ASCII.GetBytes(desKey.Substring(24, 8));
byte[] encryptedContent = EncDecUtil.Base64Decrypt(sections[2]);
string decryptedContent = Encoding.UTF8.GetString(EncDecUtil.TripleDESDecrypt(key, encryptedContent));
//
return(decryptedContent);
}
