C#-java RSA加密解密

using Org.BouncyCastle.Math;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.X509;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Pkcs;
using System;
using System.Security.Cryptography;
using System.Text;
using System.Xml;

namespace UtilityHelper
{
/// <summary>
/// RSA加密解密&數字簽名
/// </summary>
public sealed class RSA
{
#region RSA 加密解密

#region RSA 的密鑰產生
/// <summary>
/// RSA產生密鑰
/// </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 RSA加密函數
//############################################################################## 
//RSA 方式加密 
//KEY必須是XML的形式,返回的是字符串 
//該加密方式有長度限制的！
//##############################################################################

/// <summary>
/// RSA的加密函數
/// </summary>
/// <param name="xmlPublicKey">公鑰</param>
/// <param name="encryptString">待加密的字符串</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的加密函數 
/// </summary>
/// <param name="xmlPublicKey">公鑰</param>
/// <param name="EncryptString">待加密的字節數組</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解密函數 
/// <summary>
/// RSA的解密函數
/// </summary>
/// <param name="xmlPrivateKey">私鑰</param>
/// <param name="decryptString">待解密的字符串</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的解密函數 
/// </summary>
/// <param name="xmlPrivateKey">私鑰</param>
/// <param name="DecryptString">待解密的字節數組</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對象。 
// 現在要 rsa2 發送一段信息給 rsa1， 則先由 rsa1 發送“公鑰”給 rsa2 
// rsa2 獲取得公鑰之后，用來加密要發送的數據內容。 
// rsa1 獲取加密后的內容后，用自己的私鑰解密，得出原始的數據內容。

RSACryptoServiceProvider rsa1 = new RSACryptoServiceProvider();
RSACryptoServiceProvider rsa2 = new RSACryptoServiceProvider();

publickey = rsa1.ToXmlString(false); //導出 rsa1 的公鑰

rsa2.FromXmlString(publickey); //rsa2 導入 rsa1 的公鑰，用於加密信息

//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對象。 
//// 現在要 rsa2 發送一段信息給 rsa1， 則先由 rsa1 發送“公鑰”給 rsa2 
//// rsa2 獲取得公鑰之后，用來加密要發送的數據內容。 
//// rsa1 獲取加密后的內容后，用自己的私鑰解密，得出原始的數據內容。

//RSACryptoServiceProvider rsa1 = new RSACryptoServiceProvider();
//RSACryptoServiceProvider rsa2 = new RSACryptoServiceProvider();

//publickey = rsa1.ToXmlString(false); //導出 rsa1 的公鑰

//rsa2.FromXmlString(publickey); //rsa2 導入 rsa1 的公鑰，用於加密信息

////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("解密后的數據是：");
//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">待簽名的字符串</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">待簽名的字符串</param>
/// <param name="strHashData">Hash描述</param>
/// <returns></returns>
static public bool GetHash(string strSource, ref string strHashData)
{
try
{
//從字符串中取得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">待簽名的文件</param>
/// <param name="HashData">Hash描述</param>
/// <returns></returns>
static public bool GetHash(System.IO.FileStream objFile, ref byte[] HashData)
{
try
{
//從文件中取得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">待簽名的文件</param>
/// <param name="strHashData">Hash描述</param>
/// <returns></returns>
static public bool GetHash(System.IO.FileStream objFile, ref string strHashData)
{
try
{
//從文件中取得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">簽名后的結果</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);
//設置簽名的算法為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">簽名后的結果</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);
//設置簽名的算法為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">簽名后的結果</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);
//設置簽名的算法為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">簽名后的結果</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);
//設置簽名的算法為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">簽名后的結果</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">簽名后的結果</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">簽名后的結果</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">簽名后的結果</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
}

}