/// <summary>
/// 采用标准RSA算法
/// </summary>
/// <param name="EncryptString"></param>
/// <returns></returns>
public async static Task <string> RSAEncrypt(string EncryptString)
{
// var pempath = $"{Environment.CurrentDirectory}/{ConfigHelper.Configuration["WeChatPay:RsaPublicKey"]}";
if (!File.Exists(WxPayConfig.pempath))
{
var PublicKey = await WxPayApi.Getpublickey();
if (!string.IsNullOrWhiteSpace(PublicKey))
{
File.WriteAllText(WxPayConfig.pempath, PublicKey);
}
else
{
return("获取公钥失败！");
}
}
string R;
// 加载公钥
RsaKeyParameters pubkey;
using (var sr = new StreamReader(WxPayConfig.pempath))
{
var pemReader = new PemReader(sr);
pubkey = (RsaKeyParameters)pemReader.ReadObject();
}
// 初始化cipher
var cipher =
(BufferedAsymmetricBlockCipher)CipherUtilities.GetCipher("RSA/ECB/OAEPWITHSHA-1ANDMGF1PADDING");
cipher.Init(true, pubkey);
// 加密message
var message = Encoding.UTF8.GetBytes(EncryptString);
var output = EncryptUtil.Encrypt(message, cipher);
R = Convert.ToBase64String(output);
return(R);
}