解决 Operation is not supported on this platform 异常
直接上代码：
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="publicKey"></param>
/// <returns>格式转换结果</returns>
public static string RSAPublicKeyJava2DotNet(string publicKey)
{
if (string.IsNullOrEmpty(publicKey))
{
return string.Empty;
} RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKey));
return string.Format(
"<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent></RSAKeyValue>",
Convert.ToBase64String(publicKeyParam.Modulus.ToByteArrayUnsigned()),
Convert.ToBase64String(publicKeyParam.Exponent.ToByteArrayUnsigned())
);
} /// <summary>
/// 公钥验签
/// </summary>
/// <param name="plainText"></param>
/// <param name="publicKey"></param>
/// <param name="signedData"></param>
/// <returns></returns>
public static bool ValidateRsaSign(string plainText, string publicKey, string signedData)
{
try
{
//// net
//RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
//rsa.FromXmlString(publicKey);
//return rsa.VerifyData(UTF8Encoding.UTF8.GetBytes(plainText), "md5", Convert.FromBase64String(signedData)); //// net core 2.0
var rsa = RSA.Create();
rsa.FromXmlStringExtensions(publicKey);
return rsa.VerifyData(UTF8Encoding.UTF8.GetBytes(plainText), Convert.FromBase64String(signedData), HashAlgorithmName.MD5, RSASignaturePadding.Pkcs1);
}
catch (Exception e)
{
throw e;
}
} } /// <summary>
/// System.Security.Cryptography.RSA 扩展方法
/// </summary>
internal static class RSAExtensions
{
// 处理 下面两种方式都会出现的 Operation is not supported on this platform 异常
// RSA.Create().FromXmlString(privateKey)
// new RSACryptoServiceProvider().FromXmlString(privateKey) /// <summary>
/// 扩展FromXmlString
/// </summary>
/// <param name="rsa"></param>
/// <param name="xmlString"></param>
public static void FromXmlStringExtensions(this RSA rsa, string xmlString)
{
RSAParameters parameters = new RSAParameters(); XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlString); if (xmlDoc.DocumentElement.Name.Equals("RSAKeyValue"))
{
foreach (XmlNode node in xmlDoc.DocumentElement.ChildNodes)
{
switch (node.Name)
{
case "Modulus": parameters.Modulus = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "Exponent": parameters.Exponent = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "P": parameters.P = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "Q": parameters.Q = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "DP": parameters.DP = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "DQ": parameters.DQ = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "InverseQ": parameters.InverseQ = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
case "D": parameters.D = (string.IsNullOrEmpty(node.InnerText) ? null : Convert.FromBase64String(node.InnerText)); break;
}
}
}
else
{
throw new Exception("Invalid XML RSA key.");
} rsa.ImportParameters(parameters);
} /// <summary>
/// 扩展ToXmlString
/// </summary>
/// <param name="rsa"></param>
/// <param name="includePrivateParameters"></param>
/// <returns></returns>
public static string ToXmlStringExtensions(this RSA rsa, bool includePrivateParameters)
{
RSAParameters parameters = rsa.ExportParameters(includePrivateParameters); 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>",
parameters.Modulus != null ? Convert.ToBase64String(parameters.Modulus) : null,
parameters.Exponent != null ? Convert.ToBase64String(parameters.Exponent) : null,
parameters.P != null ? Convert.ToBase64String(parameters.P) : null,
parameters.Q != null ? Convert.ToBase64String(parameters.Q) : null,
parameters.DP != null ? Convert.ToBase64String(parameters.DP) : null,
parameters.DQ != null ? Convert.ToBase64String(parameters.DQ) : null,
parameters.InverseQ != null ? Convert.ToBase64String(parameters.InverseQ) : null,
parameters.D != null ? Convert.ToBase64String(parameters.D) : null);
} }
参考：