public class RSAHelper
{
/// <summary>
/// 私钥签名
/// </summary>
/// <param name="signStr"></param>
/// <param name="privateKey"></param>
/// <returns></returns>
public static string RSASign(string signStr, string privateKey)
{
try
{
//// net
//var rsa = new RSACryptoServiceProvider();
//rsa.FromXmlString(privateKey);
//byte[] signBytes = rsa.SignData(UTF8Encoding.UTF8.GetBytes(signStr), "md5");
//return Convert.ToBase64String(signBytes);
// net core 2.0
var rsa = RSA.Create();
rsa.FromXmlStringExtensions(privateKey);
byte[] bytes = rsa.SignData(UTF8Encoding.UTF8.GetBytes(signStr), HashAlgorithmName.MD5, RSASignaturePadding.Pkcs1);
return Convert.ToBase64String(bytes);
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 公钥签名
/// </summary>
/// <param name="encrypt_info"></param>
/// <param name="publicKey"></param>
/// <returns></returns>
public static string RSAEncrypt(string strEncryptInfo, string publicKey)
{
try
{
//// net
//RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
//rsa.FromXmlString(strPublicKey);
//byte[] bytes = rsa.Encrypt(UTF8Encoding.UTF8.GetBytes(strEncryptInfo), false);
//return Convert.ToBase64String(bytes);
// net core 2.0
var rsa = RSA.Create();
publicKey = RSAPublicKeyJava2DotNet(publicKey);
rsa.FromXmlStringExtensions(publicKey);
byte[] bytes = rsa.Encrypt(UTF8Encoding.UTF8.GetBytes(strEncryptInfo), RSAEncryptionPadding.Pkcs1);
return Convert.ToBase64String(bytes);
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// RSA私钥格式转换
/// </summary>
/// <param name="privateKey"></param>
/// <returns></returns>
public static string RSAPrivateKeyJava2DotNet(string privateKey)
{
if (string.IsNullOrEmpty(privateKey))
{
return string.Empty;
}
RsaPrivateCrtKeyParameters privateKeyParam = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKey));
return string.Format(
"<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent><P>{2}</P><Q>{3}</Q><DP>{4}</DP><DQ>{5}</DQ><InverseQ>{6}</InverseQ><D>{7}</D></RSAKeyValue>",
Convert.ToBase64String(privateKeyParam.Modulus.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.PublicExponent.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.P.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.Q.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.DP.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.DQ.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.QInv.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.Exponent.ToByteArrayUnsigned())
);
}
/// <summary>
/// RSA公钥格式转换
/// </summary>
/// <param name=&