C#⾃定义RSA加密解密及RSA签名和验证类实例本⽂实例讲述了C#⾃定义RSA加密解密及RSA签名和验证类。分享给⼤家供⼤家参考。具体分析如下：
这个C#类⾃定义RSA加密解密及RSA签名和验证，包含了RSA加密、解密及签名所需的相关函数，带有详细的注释说明。using System;
using System.Text;
using System.Security.Cryptography;
namespace DotNet.Utilities
{
/// <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
签名字符串是什么#endregion
#region RSA数字签名
#region 获取Hash描述表
//获取Hash描述表，sharejs
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
}
}
希望本⽂所述对⼤家的C#程序设计有所帮助。

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