.NET core RSA帮助类

来源:转载

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:

http://www.cnblogs.com/dudu/p/dotnet-core-rsa-openssl.html

https://github.com/dotnet/core/issues/874

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