C#RSA的研究，C#、Java互通
阿新 • • 發佈：2020-12-24
不加解釋，自己研究
using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.Pkcs; using Org.BouncyCastle.Asn1.X509; using Org.BouncyCastle.Crypto; using Org.BouncyCastle.Crypto.Encodings; using Org.BouncyCastle.Crypto.Engines; using Org.BouncyCastle.Crypto.Parameters; using Org.BouncyCastle.Math; using Org.BouncyCastle.Pkcs;using Org.BouncyCastle.Security; using Org.BouncyCastle.X509; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Security.Cryptography; using System.Text; using System.Xml; namespace HealthHappy.PlatformInterface.Cytj { public sealed class RSAHelper {#region RSA 加密解密 #region RSA 的金鑰產生 /// <summary> /// RSA產生金鑰 /// </summary> /// <param name="xmlKeys">私鑰</param> /// <param name="xmlPublicKey">公鑰</param> static public void RSAKey(out string xmlKeys, out string xmlPublicKey) {try { System.Security.Cryptography.RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); xmlKeys = rsa.ToXmlString(true); xmlPublicKey = rsa.ToXmlString(false); } catch (Exception ex) { throw ex; } } #endregion #region 加密 /// <summary> /// RSA加密 /// </summary> /// <param name="publicKeyJava"></param> /// <param name="data"></param> /// <returns></returns> public static string EncryptJava(string publicKeyJava, string data, string encoding = "UTF-8") { RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); //byte[] cipherbytes; //rsa.FromPublicKeyJavaString(publicKeyJava); rsa.FromXmlString(publicKeyJava); //☆☆☆☆.NET 4.6以後特有☆☆☆☆ //HashAlgorithmName hashName = new System.Security.Cryptography.HashAlgorithmName(hashAlgorithm); //RSAEncryptionPadding padding = RSAEncryptionPadding.OaepSHA512;//RSAEncryptionPadding.CreateOaep(hashName);//.NET 4.6以後特有 //cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), padding); //☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆ //☆☆☆☆.NET 4.6以前請用此段程式碼☆☆☆☆ //cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), false); using (var rsaProvider = new RSACryptoServiceProvider()) { var inputBytes = Encoding.UTF8.GetBytes(data);//有含義的字串轉化為位元組流 int bufferSize = (rsa.KeySize / 8) - 11;//單塊最大長度 var buffer = new byte[bufferSize]; using (MemoryStream inputStream = new MemoryStream(inputBytes), outputStream = new MemoryStream()) { while (true) { //分段加密 int readSize = inputStream.Read(buffer, 0, bufferSize); if (readSize <= 0) { break; } var temp = new byte[readSize]; Array.Copy(buffer, 0, temp, 0, readSize); var encryptedBytes = rsaProvider.Encrypt(temp, false); outputStream.Write(encryptedBytes, 0, encryptedBytes.Length); } return Convert.ToBase64String(outputStream.ToArray());//轉化為位元組流方便傳輸 } } } /// <summary> /// RSA加密 /// </summary> /// <param name="publicKeyCSharp"></param> /// <param name="data"></param> /// <returns></returns> public static string EncryptCSharp(string publicKeyCSharp, string data, string encoding = "UTF-8") { RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKeyCSharp)); SubjectPublicKeyInfo subjectPublicKeyInfo = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(publicKeyParam); Asn1Object asn1ObjectPublic = subjectPublicKeyInfo.ToAsn1Object(); byte[] publicInfoByte = asn1ObjectPublic.GetEncoded(); Asn1Object pubKeyObj = Asn1Object.FromByteArray(publicInfoByte);//這裡也可以從流中讀取，從本地匯入 AsymmetricKeyParameter pubKey = PublicKeyFactory.CreateKey(SubjectPublicKeyInfo.GetInstance(pubKeyObj)); IAsymmetricBlockCipher cipher = new Pkcs1Encoding(new RsaEngine()); cipher.Init(true, pubKey);//true表示加密 //byte[] encryptData = cipher.ProcessBlock(Encoding.UTF8.GetBytes(data1), 0, Encoding.UTF8.GetBytes(data).Length); byte[] encryptData = null; //加密 try { byte[] byteData = System.Text.Encoding.UTF8.GetBytes(data); int inputLen = byteData.Length; MemoryStream ms = new MemoryStream(); int offSet = 0; byte[] cache; int i = 0; // 對資料分段加密 while (inputLen - offSet > 0) { if (inputLen - offSet > 117) { cache = cipher.ProcessBlock(byteData, offSet, 117); } else { cache = cipher.ProcessBlock(byteData, offSet, inputLen - offSet); } ms.Write(cache, 0, cache.Length); i++; offSet = i * 117; } encryptData = ms.ToArray(); ms.Close(); ms.Dispose(); //var ResultData = engine.ProcessBlock(byteData, 0, byteData.Length); //string testData = Convert.ToBase64String(encryptedData); //Console.WriteLine("密文（base64編碼）:" + Convert.ToBase64String(encryptedData) + Environment.NewLine); } catch (Exception ex) { //return ex.Message; Console.WriteLine("密文（base64編碼）:" + Convert.ToBase64String(encryptData) + Environment.NewLine); } return Convert.ToBase64String(encryptData); ; RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); byte[] cipherbytes; rsa.FromXmlString(publicKeyCSharp); //☆☆☆☆.NET 4.6以後特有☆☆☆☆ //HashAlgorithmName hashName = new System.Security.Cryptography.HashAlgorithmName(hashAlgorithm); //RSAEncryptionPadding padding = RSAEncryptionPadding.OaepSHA512;//RSAEncryptionPadding.CreateOaep(hashName);//.NET 4.6以後特有 //cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), padding); //☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆ //☆☆☆☆.NET 4.6以前請用此段程式碼☆☆☆☆ cipherbytes = rsa.Encrypt(Encoding.GetEncoding(encoding).GetBytes(data), false); return Convert.ToBase64String(cipherbytes); } #endregion #region RSA加密函式 //############################################################################## //RSA 方式加密 //KEY必須是XML的形式,返回的是字串 //該加密方式有長度限制的！ //############################################################################## /// <summary> /// RSA的加密函式 /// </summary> /// <param name="xmlPublicKey">公鑰</param> /// <param name="encryptString">待加密的字串</param> /// <returns></returns> static public string RSAEncrypt(string xmlPublicKey, string encryptString) { try { byte[] PlainTextBArray; byte[] CypherTextBArray; string Result; System.Security.Cryptography.RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); rsa.FromXmlString(xmlPublicKey); PlainTextBArray = (new UTF8Encoding()).GetBytes(encryptString); CypherTextBArray = rsa.Encrypt(PlainTextBArray, false); Result = Convert.ToBase64String(CypherTextBArray); return Result; } catch (Exception ex) { throw ex; } } /// <summary> /// RSA的加密函式 /// </summary> /// <param name="xmlPublicKey">公鑰</param> /// <param name="EncryptString">待加密的位元組陣列</param> /// <returns></returns> static public string RSAEncrypt(string xmlPublicKey, byte[] EncryptString) { try { byte[] CypherTextBArray; string Result; System.Security.Cryptography.RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); rsa.FromXmlString(xmlPublicKey); CypherTextBArray = rsa.Encrypt(EncryptString, false); Result = Convert.ToBase64String(CypherTextBArray); return Result; } catch (Exception ex) { throw ex; } } #endregion #region RSA解密函式 /// <summary> /// RSA的解密函式 /// </summary> /// <param name="xmlPrivateKey">私鑰</param> /// <param name="decryptString">待解密的字串</param> /// <returns></returns> static public string RSADecrypt(string xmlPrivateKey, string decryptString) { try { byte[] PlainTextBArray; byte[] DypherTextBArray; string Result; System.Security.Cryptography.RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); rsa.FromXmlString(xmlPrivateKey); PlainTextBArray = Convert.FromBase64String(decryptString); DypherTextBArray = rsa.Decrypt(PlainTextBArray, false); Result = (new UTF8Encoding()).GetString(DypherTextBArray); return Result; } catch (Exception ex) { throw ex; } } /// <summary> /// RSA的解密函式 /// </summary> /// <param name="xmlPrivateKey">私鑰</param> /// <param name="DecryptString">待解密的位元組陣列</param> /// <returns></returns> static public string RSADecrypt(string xmlPrivateKey, byte[] DecryptString) { try { byte[] DypherTextBArray; string Result; System.Security.Cryptography.RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); rsa.FromXmlString(xmlPrivateKey); DypherTextBArray = rsa.Decrypt(DecryptString, false); Result = (new UnicodeEncoding()).GetString(DypherTextBArray); return Result; } catch (Exception ex) { throw ex; } } #endregion static public string EncryptRSA(string publickey, string plaintext) { //RSA的加解密過程： // 有 rsa1 和 rsa2 兩個RSA物件。 // 現在要 rsa2 傳送一段資訊給 rsa1， 則先由 rsa1 傳送“公鑰”給 rsa2 // rsa2 獲取得公鑰之後，用來加密要傳送的資料內容。 // rsa1 獲取加密後的內容後，用自己的私鑰解密，得出原始的資料內容。 RSACryptoServiceProvider rsa1 = new RSACryptoServiceProvider(); RSACryptoServiceProvider rsa2 = new RSACryptoServiceProvider(); publickey = rsa1.ToXmlString(false); //匯出 rsa1 的公鑰 rsa2.FromXmlString(publickey); //rsa2 匯入 rsa1 的公鑰，用於加密資訊 //rsa2開始加密 byte[] cipherbytes; cipherbytes = rsa2.Encrypt(Encoding.UTF8.GetBytes(plaintext), false); string resut = string.Empty; for (int i = 0; i < cipherbytes.Length; i++) { resut += string.Format("{0:X2} ", cipherbytes[i]); } return resut; } public void DecryptRSA(string publickey, string plaintext) { ////RSA的加解密過程： //// 有 rsa1 和 rsa2 兩個RSA物件。 //// 現在要 rsa2 傳送一段資訊給 rsa1， 則先由 rsa1 傳送“公鑰”給 rsa2 //// rsa2 獲取得公鑰之後，用來加密要傳送的資料內容。 //// rsa1 獲取加密後的內容後，用自己的私鑰解密，得出原始的資料內容。 //RSACryptoServiceProvider rsa1 = new RSACryptoServiceProvider(); //RSACryptoServiceProvider rsa2 = new RSACryptoServiceProvider(); //publickey = rsa1.ToXmlString(false); //匯出 rsa1 的公鑰 //rsa2.FromXmlString(publickey); //rsa2 匯入 rsa1 的公鑰，用於加密資訊 ////rsa2開始加密 //byte[] cipherbytes; //cipherbytes = rsa2.Encrypt(Encoding.UTF8.GetBytes(plaintext), false); //string resut = string.Empty; //for (int i = 0; i < cipherbytes.Length; i++) //{ // resut += string.Format("{0:X2} ", cipherbytes[i]); //} //return resut; ////rsa1開始解密 //byte[] plaintbytes; //plaintbytes = rsa1.Decrypt(cipherbytes, false); //Console.WriteLine("解密後的資料是："); //Console.WriteLine(Encoding.UTF8.GetString(plaintbytes)); //Console.ReadLine(); } #endregion #region RSA 數字簽名 #region 獲取Hash描述表 /// <summary> /// 獲取Hash描述表 /// </summary> /// <param name="strSource">待簽名的字串</param> /// <param name="HashData">Hash描述</param> /// <returns></returns> static public bool GetHash(string strSource, ref byte[] HashData) { try { byte[] Buffer; System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5"); Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(strSource); HashData = MD5.ComputeHash(Buffer); return true; } catch (Exception ex) { throw ex; } } /// <summary> /// 獲取Hash描述表 /// </summary> /// <param name="strSource">待簽名的字串</param> /// <param name="strHashData">Hash描述</param> /// <returns></returns> static public bool GetHash(string strSource, ref string strHashData) { try { //從字串中取得Hash描述 byte[] Buffer; byte[] HashData; System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5"); Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(strSource); HashData = MD5.ComputeHash(Buffer); strHashData = Convert.ToBase64String(HashData); return true; } catch (Exception ex) { throw ex; } } /// <summary> /// 獲取Hash描述表 /// </summary> /// <param name="objFile">待簽名的檔案</param> /// <param name="HashData">Hash描述</param> /// <returns></returns> static public bool GetHash(System.IO.FileStream objFile, ref byte[] HashData) { try { //從檔案中取得Hash描述 System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5"); HashData = MD5.ComputeHash(objFile); objFile.Close(); return true; } catch (Exception ex) { throw ex; } } /// <summary> /// 獲取Hash描述表 /// </summary> /// <param name="objFile">待簽名的檔案</param> /// <param name="strHashData">Hash描述</param> /// <returns></returns> static public bool GetHash(System.IO.FileStream objFile, ref string strHashData) { try { //從檔案中取得Hash描述 byte[] HashData; System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5"); HashData = MD5.ComputeHash(objFile); objFile.Close(); strHashData = Convert.ToBase64String(HashData); return true; } catch (Exception ex) { throw ex; } } #endregion #region RSA簽名 /// <summary> /// RSA簽名 /// </summary> /// <param name="strKeyPrivate">私鑰</param> /// <param name="HashbyteSignature">待簽名Hash描述</param> /// <param name="EncryptedSignatureData">簽名後的結果</param> /// <returns></returns> static public bool SignatureFormatter(string strKeyPrivate, byte[] HashbyteSignature, ref byte[] EncryptedSignatureData) { try { System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(); RSA.FromXmlString(strKeyPrivate); System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA); //設定簽名的演算法為MD5 RSAFormatter.SetHashAlgorithm("MD5"); //執行簽名 EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); return true; } catch (Exception ex) { throw ex; } } /// <summary> /// RSA簽名 /// </summary> /// <param name="strKeyPrivate">私鑰</param> /// <param name="HashbyteSignature">待簽名Hash描述</param> /// <param name="m_strEncryptedSignatureData">簽名後的結果</param> /// <returns></returns> static public bool SignatureFormatter(string strKeyPrivate, byte[] HashbyteSignature, ref string strEncryptedSignatureData) { try { byte[] EncryptedSignatureData; System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(); RSA.FromXmlString(strKeyPrivate); System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA); //設定簽名的演算法為MD5 RSAFormatter.SetHashAlgorithm("MD5"); //執行簽名 EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData); return true; } catch (Exception ex) { throw ex; } } /// <summary> /// RSA簽名 /// </summary> /// <param name="strKeyPrivate">私鑰</param> /// <param name="strHashbyteSignature">待簽名Hash描述</param> /// <param name="EncryptedSignatureData">簽名後的結果</param> /// <returns></returns> static public bool SignatureFormatter(string strKeyPrivate, string strHashbyteSignature, ref byte[] EncryptedSignatureData) { try { byte[] HashbyteSignature; HashbyteSignature = Convert.FromBase64String(strHashbyteSignature); System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(); RSA.FromXmlString(strKeyPrivate); System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA); //設定簽名的演算法為MD5 RSAFormatter.SetHashAlgorithm("MD5"); //執行簽名 EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); return true; } catch (Exception ex) { throw ex; } } /// <summary> /// RSA簽名 /// </summary> /// <param name="strKeyPrivate">私鑰</param> /// <param name="strHashbyteSignature">待簽名Hash描述</param> /// <param name="strEncryptedSignatureData">簽名後的結果</param> /// <returns></returns> static public bool SignatureFormatter(string strKeyPrivate, string strHashbyteSignature, ref string strEncryptedSignatureData) { try { byte[] HashbyteSignature; byte[] EncryptedSignatureData; HashbyteSignature = Convert.FromBase64String(strHashbyteSignature); System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(); RSA.FromXmlString(strKeyPrivate); System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA); //設定簽名的演算法為MD5 RSAFormatter.SetHashAlgorithm("MD5"); //執行簽名 EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature); strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData); return true; } catch (Exception ex) { throw ex; } } #endregion #region RSA 簽名驗證 /// <summary> /// RSA簽名驗證 /// </summary> /// <param name="strKeyPublic">公鑰</param> /// <param name="HashbyteDeformatter">Hash描述</param> /// <param name="DeformatterData">簽名後的結果</param> /// <returns></returns> static public bool SignatureDeformatter(string strKeyPublic, byte[] HashbyteDeformatter, byte[] DeformatterData) { try { System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(); RSA.FromXmlString(strKeyPublic); System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA); //指定解密的時候HASH演算法為MD5 RSADeformatter.SetHashAlgorithm("MD5"); if (RSADeformatter.VerifySignature(HashbyteDeformatter, DeformatterData)) { return true; } else { return false; } } catch (Exception ex) { throw ex; } } /// <summary> /// RSA簽名驗證 /// </summary> /// <param name="strKeyPublic">公鑰</param> /// <param name="strHashbyteDeformatter">Hash描述</param> /// <param name="DeformatterData">簽名後的結果</param> /// <returns></returns> static public bool SignatureDeformatter(string strKeyPublic, string strHashbyteDeformatter, byte[] DeformatterData) { try { byte[] HashbyteDeformatter; HashbyteDeformatter = Convert.FromBase64String(strHashbyteDeformatter); System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(); RSA.FromXmlString(strKeyPublic); System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA); //指定解密的時候HASH演算法為MD5 RSADeformatter.SetHashAlgorithm("MD5"); if (RSADeformatter.VerifySignature(HashbyteDeformatter, DeformatterData)) { return true; } else { return false; } } catch (Exception ex) { throw ex; } } /// <summary> /// RSA簽名驗證 /// </summary> /// <param name="strKeyPublic">公鑰</param> /// <param name="HashbyteDeformatter">Hash描述</param> /// <param name="strDeformatterData">簽名後的結果</param> /// <returns></returns> static public bool SignatureDeformatter(string strKeyPublic, byte[] HashbyteDeformatter, string strDeformatterData) { try { byte[] DeformatterData; System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(); RSA.FromXmlString(strKeyPublic); System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA); //指定解密的時候HASH演算法為MD5 RSADeformatter.SetHashAlgorithm("MD5"); DeformatterData = Convert.FromBase64String(strDeformatterData); if (RSADeformatter.VerifySignature(HashbyteDeformatter, DeformatterData)) { return true; } else { return false; } } catch (Exception ex) { throw ex; } } /// <summary> /// RSA簽名驗證 /// </summary> /// <param name="strKeyPublic">公鑰</param> /// <param name="strHashbyteDeformatter">Hash描述</param> /// <param name="strDeformatterData">簽名後的結果</param> /// <returns></returns> static public bool SignatureDeformatter(string strKeyPublic, string strHashbyteDeformatter, string strDeformatterData) { try { byte[] DeformatterData; byte[] HashbyteDeformatter; HashbyteDeformatter = Convert.FromBase64String(strHashbyteDeformatter); System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(); RSA.FromXmlString(strKeyPublic); System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA); //指定解密的時候HASH演算法為MD5 RSADeformatter.SetHashAlgorithm("MD5"); DeformatterData = Convert.FromBase64String(strDeformatterData); if (RSADeformatter.VerifySignature(HashbyteDeformatter, DeformatterData)) { return true; } else { return false; } } catch (Exception ex) { throw ex; } } #endregion #endregion #region 公鑰私鑰DotNet和Java互轉 /// <summary> /// RSA私鑰格式轉換，java->.net /// </summary> /// <param name="privateKey">java生成的RSA私鑰</param> /// <returns></returns> public static string RSAPrivateKeyJava2DotNet(string privateKey) { 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私鑰格式轉換，.net->java /// </summary> /// <param name="privateKey">.net生成的私鑰</param> /// <returns></returns> public static string RSAPrivateKeyDotNet2Java(string privateKey) { XmlDocument doc = new XmlDocument(); doc.LoadXml(privateKey); BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText)); BigInteger exp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText)); BigInteger d = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("D")[0].InnerText)); BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("P")[0].InnerText)); BigInteger q = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Q")[0].InnerText)); BigInteger dp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DP")[0].InnerText)); BigInteger dq = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DQ")[0].InnerText)); BigInteger qinv = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("InverseQ")[0].InnerText)); RsaPrivateCrtKeyParameters privateKeyParam = new RsaPrivateCrtKeyParameters(m, exp, d, p, q, dp, dq, qinv); PrivateKeyInfo privateKeyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privateKeyParam); byte[] serializedPrivateBytes = privateKeyInfo.ToAsn1Object().GetEncoded(); return Convert.ToBase64String(serializedPrivateBytes); } /// <summary> /// RSA公鑰格式轉換，java->.net /// </summary> /// <param name="publicKey">java生成的公鑰</param> /// <returns></returns> public static string RSAPublicKeyJava2DotNet(string publicKey) { 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> /// RSA公鑰格式轉換，.net->java /// </summary> /// <param name="publicKey">.net生成的公鑰</param> /// <returns></returns> public static string RSAPublicKeyDotNet2Java(string publicKey) { XmlDocument doc = new XmlDocument(); doc.LoadXml(publicKey); BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText)); BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText)); RsaKeyParameters pub = new RsaKeyParameters(false, m, p); SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(pub); byte[] serializedPublicBytes = publicKeyInfo.ToAsn1Object().GetDerEncoded(); return Convert.ToBase64String(serializedPublicBytes); } #endregion } }