RSA加密解密及RSA签名和验证

/// <summary>

/// RSA加密解密及RSA签名和验证

/// </summary>

public class RSACryption

{

public RSACryption()

{

}

#region RSA 加密解密

#region RSA 的密钥产生

/// <summary>

/// RSA 的密钥产生 产生私钥 和公钥

/// </summary>

/// <param name="xmlKeys"></param>

/// <param name="xmlPublicKey"></param>

public void RSAKey(out string xmlKeys,out string xmlPublicKey)

{

System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();

xmlKeys=rsa.ToXmlString(true);

xmlPublicKey = rsa.ToXmlString(false);

}

#endregion

#region RSA的加密函数

//##############################################################################

//RSA 方式加密

//说明KEY必须是XML的行式,返回的是字符串

//在有一点需要说明！！该加密方式有 长度 限制的！！

//##############################################################################

//RSA的加密函数 string

public string RSAEncrypt(string xmlPublicKey,string m_strEncryptString )

{

byte[] PlainTextBArray;

byte[] CypherTextBArray;

string Result;

RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();

rsa.FromXmlString(xmlPublicKey);

PlainTextBArray = (new UnicodeEncoding()).GetBytes(m_strEncryptString);

CypherTextBArray = rsa.Encrypt(PlainTextBArray, false);

Result=Convert.ToBase64String(CypherTextBArray);

return Result;

}

//RSA的加密函数 byte[]

public string RSAEncrypt(string xmlPublicKey,byte[] EncryptString )

{

byte[] CypherTextBArray;

string Result;

RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();

rsa.FromXmlString(xmlPublicKey);

CypherTextBArray = rsa.Encrypt(EncryptString, false);

Result=Convert.ToBase64String(CypherTextBArray);

return Result;

}

#endregion

#region RSA的解密函数

//RSA的解密函数 string

public string RSADecrypt(string xmlPrivateKey, string m_strDecryptString )

{

byte[] PlainTextBArray;

byte[] DypherTextBArray;

string Result;

System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();

rsa.FromXmlString(xmlPrivateKey);

PlainTextBArray =Convert.FromBase64String(m_strDecryptString);

DypherTextBArray=rsa.Decrypt(PlainTextBArray, false);

Result=(new UnicodeEncoding()).GetString(DypherTextBArray);

return Result;

}

//RSA的解密函数 byte

public string RSADecrypt(string xmlPrivateKey, byte[] DecryptString )

{

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;

}

#endregion

#endregion

#region RSA数字签名

#region 获取Hash描述表

//获取Hash描述表

public bool GetHash(string m_strSource, ref byte[] HashData)

{

//从字符串中取得Hash描述

byte[] Buffer;

System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");

Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(m_strSource);

HashData = MD5.ComputeHash(Buffer);

return true;

}

//获取Hash描述表

public bool GetHash(string m_strSource, ref string strHashData)

{

//从字符串中取得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(m_strSource);

HashData = MD5.ComputeHash(Buffer);

strHashData = Convert.ToBase64String(HashData);

return true;

}

//获取Hash描述表

public bool GetHash(System.IO.FileStream objFile, ref byte[] HashData)

{

//从文件中取得Hash描述

System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");

HashData = MD5.ComputeHash(objFile);

objFile.Close();

return true;

}

//获取Hash描述表

public bool GetHash(System.IO.FileStream objFile, ref string strHashData)

{

//从文件中取得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;

}

#endregion

#region RSA签名

//RSA签名

public bool SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, ref byte[] EncryptedSignatureData)

{

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPrivate);

System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);

//设置签名的算法为MD5

RSAFormatter.SetHashAlgorithm("MD5");

//执行签名

EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);

return true;

}

//RSA签名

public bool SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, ref string m_strEncryptedSignatureData)

{

byte[] EncryptedSignatureData;

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPrivate);

System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);

//设置签名的算法为MD5

RSAFormatter.SetHashAlgorithm("MD5");

//执行签名

EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);

m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData);

return true;

}

//RSA签名

public bool SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, ref byte[] EncryptedSignatureData)

{

byte[] HashbyteSignature;

HashbyteSignature = Convert.FromBase64String(m_strHashbyteSignature);

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPrivate);

System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);

//设置签名的算法为MD5

RSAFormatter.SetHashAlgorithm("MD5");

//执行签名

EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);

return true;

}

//RSA签名

public bool SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, ref string m_strEncryptedSignatureData)

{

byte[] HashbyteSignature;

byte[] EncryptedSignatureData;

HashbyteSignature = Convert.FromBase64String(m_strHashbyteSignature);

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPrivate);

System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);

//设置签名的算法为MD5

RSAFormatter.SetHashAlgorithm("MD5");

//执行签名

EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);

m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData);

return true;

}

#endregion

#region RSA 签名验证

public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, byte[] DeformatterData)

{

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPublic);

System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);

//指定解密的时候HASH算法为MD5

RSADeformatter.SetHashAlgorithm("MD5");

if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))

{

return true;

}

else

{

return false;

}

}

public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, byte[] DeformatterData)

{

byte[] HashbyteDeformatter;

HashbyteDeformatter = Convert.FromBase64String(p_strHashbyteDeformatter);

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPublic);

System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);

//指定解密的时候HASH算法为MD5

RSADeformatter.SetHashAlgorithm("MD5");

if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))

{

return true;

}

else

{

return false;

}

}

public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, string p_strDeformatterData)

{

byte[] DeformatterData;

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPublic);

System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);

//指定解密的时候HASH算法为MD5

RSADeformatter.SetHashAlgorithm("MD5");

DeformatterData =Convert.FromBase64String(p_strDeformatterData);

if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))

{

return true;

}

else

{

return false;

}

}

public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, string p_strDeformatterData)

{

byte[] DeformatterData;

byte[] HashbyteDeformatter;

HashbyteDeformatter = Convert.FromBase64String(p_strHashbyteDeformatter);

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPublic);

System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);

//指定解密的时候HASH算法为MD5

RSADeformatter.SetHashAlgorithm("MD5");

DeformatterData =Convert.FromBase64String(p_strDeformatterData);

if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))

{

return true;

}

else

{

return false;

}

}

#endregion

#endregion

}