RSA menghasilkan kunci publik dan pribadi, serta enkripsi dan dekripsi

Sampah kecil · Diposting pada 11/12/2015 10.12.29

public static class RSACryptoProvider
{
/// <summary>
/// RSA解密
/// </summary>
/// <param name="base64code">需要进行解密的密文字符串</param>
/// <param name="privateKey">私钥</param>
/// <returns>解密后的明文</returns>
public static string Decrypt(string base64code, string privateKey)
{
UnicodeEncoding ByteConverter = new UnicodeEncoding();
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.FromXmlString(privateKey);
byte[] encryptedData;
byte[] decryptedData;
encryptedData = Convert.FromBase64String(base64code);
decryptedData = RSADecrypt(encryptedData, RSA.ExportParameters(true), false);
return ByteConverter.GetString(decryptedData);
}
/// <summary>
/// RSA分段解密;用于对超长字符串解密
/// </summary>
/// <param name="toEncryptString">需要进行解密的字符串</param>
/// <param name="publickKey">私钥</param>
/// <returns>解密后的明文</returns>
public static string SectionDecrypt(string base64code, string privateKey)
{
UnicodeEncoding ByteConverter = new UnicodeEncoding();
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.FromXmlString(privateKey);
Byte[] CiphertextData = Convert.FromBase64String(base64code);
int MaxBlockSize = RSA.KeySize / 8;
if (CiphertextData.Length <= MaxBlockSize)
{
byte[] decryptedData;
decryptedData = RSADecrypt(CiphertextData, RSA.ExportParameters(true), false);
return ByteConverter.GetString(decryptedData);
}
MemoryStream CrypStream = new MemoryStream(CiphertextData);
MemoryStream PlaiStream = new MemoryStream();
Byte[] Buffer = new Byte[MaxBlockSize];
int BlockSize = CrypStream.Read(Buffer, 0, MaxBlockSize);
while (BlockSize > 0)
{
Byte[] ToDecrypt = new Byte[BlockSize];
Array.Copy(Buffer, 0, ToDecrypt, 0, BlockSize);
Byte[] Plaintext = RSADecrypt(ToDecrypt, RSA.ExportParameters(true), false);
PlaiStream.Write(Plaintext, 0, Plaintext.Length);
BlockSize = CrypStream.Read(Buffer, 0, MaxBlockSize);
}
return ByteConverter.GetString(PlaiStream.ToArray());
}
/// <summary>
/// RSA加密
/// </summary>
/// <param name="toEncryptString">需要进行加密的字符串</param>
/// <param name="publicKey">公钥</param>
/// <returns>加密后的密文</returns>
public static string Encrypt(string toEncryptString, string publicKey)
{
UnicodeEncoding ByteConverter = new UnicodeEncoding();
byte[] dataToEncrypt = ByteConverter.GetBytes(toEncryptString);
byte[] encrytedData;
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.FromXmlString(publicKey);
encrytedData = RSAEncrypt(dataToEncrypt, RSA.ExportParameters(false), false);
string base64code = Convert.ToBase64String(encrytedData);
return base64code;
}
/// <summary>
/// RSA分段加密;用于对超长字符串加密
/// </summary>
/// <param name="toEncryptString">需要进行加密的字符串</param>
/// <param name="publickKey">公钥</param>
/// <returns>加密后的密文</returns>
public static string SectionEncrypt(string toEncryptString, string publickKey)
{
string base64code = string.Empty;
UnicodeEncoding ByteConverter = new UnicodeEncoding();
byte[] dataToEncrypt = ByteConverter.GetBytes(toEncryptString);
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.FromXmlString(publickKey);
int MaxBlockSize = RSA.KeySize / 8 - 11;
if (dataToEncrypt.Length <= MaxBlockSize)
{
byte[] encrytedData;
encrytedData = RSAEncrypt(dataToEncrypt, RSA.ExportParameters(false), false);
base64code = Convert.ToBase64String(encrytedData);
return base64code;
}
MemoryStream plaiStream = new MemoryStream(dataToEncrypt);
MemoryStream CrypStream = new MemoryStream();
Byte[] Buffer = new Byte[MaxBlockSize];
int BlockSize = plaiStream.Read(Buffer, 0, MaxBlockSize);
while (BlockSize > 0)
{
Byte[] ToEncrypt = new Byte[BlockSize];
Array.Copy(Buffer, 0, ToEncrypt, 0, BlockSize);
Byte[] Cryptograph = RSAEncrypt(ToEncrypt, RSA.ExportParameters(false), false);
CrypStream.Write(Cryptograph, 0, Cryptograph.Length);
BlockSize = plaiStream.Read(Buffer, 0, MaxBlockSize);
}
base64code = Convert.ToBase64String(CrypStream.ToArray(), Base64FormattingOptions.None);
return base64code;
}
/// <summary>
/// RSA生成公钥和私钥
/// </summary>
/// <returns></returns>
public static string[] GenerateKeys()
{
try
{
string[] sKeys = new String[2];
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
sKeys[0] = rsa.ToXmlString(true);
sKeys[1] = rsa.ToXmlString(false);
return sKeys;
}
catch (Exception)
{
return null;
}
}　
private static byte[] RSAEncrypt(byte[] DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.ImportParameters(RSAKeyInfo);
return RSA.Encrypt(DataToEncrypt, DoOAEPPadding);
}
private static byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.ImportParameters(RSAKeyInfo);
return RSA.Decrypt(DataToDecrypt, DoOAEPPadding);
}
}

Salin kode

musim panas · Diposting pada 11/12/2015 10.51.32

xiaoweier · Diposting pada 11/12/2015 11.22.50

Apakah Anda juga terlibat dalam algoritma enkripsi dan dekripsi ini sekarang? Setelah belajar C, saya akan mulai mengerjakan algoritma itu. Bisakah Anda memberi saya bimbingan?

Sampah kecil · Diposting pada 11/12/2015 11.40.32

xiaoweier Posted on 2015-12-11 11:22
Apakah Anda juga terlibat dalam algoritma enkripsi dan dekripsi ini sekarang? Setelah belajar C, saya akan mulai mengerjakan algoritma itu. Bisakah Anda memberi saya bimbingan?

Mari kita lihat contohnya terlebih dahulu:

Pada kode:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace WebSite1.Security
{
public struct RSA_Keys
{
public const string Public = "<RSAKeyValue><Modulus>mcqqC6vyZSach3/PpaG+HlgI05Pu3OXX37DiLDi2wWltpcCwF3Z52dZmcrKKIwwTD0q58i46u9hiBr6VdsOU2UQEozvX5cM9gJ4EUUxq0K5PhLoRWfrCUQ1/i8d5cJ1D6a7jSJhXar4U8mM2ERiYymBfUn8zERE9qebxqwPCr0E=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
public const string Private = "<RSAKeyValue><Modulus>mcqqC6vyZSach3/PpaG+HlgI05Pu3OXX37DiLDi2wWltpcCwF3Z52dZmcrKKIwwTD0q58i46u9hiBr6VdsOU2UQEozvX5cM9gJ4EUUxq0K5PhLoRWfrCUQ1/i8d5cJ1D6a7jSJhXar4U8mM2ERiYymBfUn8zERE9qebxqwPCr0E=</Modulus><Exponent>AQAB</Exponent><P>08NgiedL36cKVuTfNdNbtbe8OjUElcPfSQ/PZaTHkum8+aeu44Pb3XIFF4YEetRdJpbwvopb7J0sS8elR28EXQ==</P><Q>uesZTcA7e8PrPzHsROWZOnFwu+vw41yqZenUAo5R0mvCzAe23QjTM+AXSuNihEtfA0KoIuneucWY/xXLj/VoNQ==</Q><DP>vk+uKQFXbO5gGmuiNmt21j8DyIPxVO8tcinlSAHo4h1yGiQaxpmwNLnN3bAxwnmsJYwtW/BYYLN4JbqMzT/2eQ==</DP><DQ>VGYkk4Y7uqCjD4ojPteX6s8KpVSjgyNS+3bd1tcyz7o5sROjcM4LytXk3QtCctogZMOCvm66vEy2er4zLcPzLQ==</DQ><InverseQ>o5MLJDmubOgGWBDpPY0r80cGDFJ0r8hLLZ8vFlVkkhNkSMuoszM0RgoIPAn/R3YsD8rIxH3CldhfPuMuXljaLg==</InverseQ><D>foCqJzelB3cfQoXrs/67eBJKEF+bF7EoRSQmpuFv0uB6BOHe9y3JRVqKosYhwnpoIygAlClavrFa0Nlr8GkowdeGQD3dW4pjMWGwC2dVub9Lot3Vm5bWEDy8QUw9e/jR7+SXfXyrknylN4sozrJtVTeb//a1x4HV1D5elQtx7cE=</D></RSAKeyValue>";
}
}

Salin kode

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace WebSite1.Security
{
/// <summary>
/// MD5加密
/// </summary>
public class MD5CryptoProvider
{
public static string Encrypt(string text)
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(text, "MD5");
}
}
}

Salin kode

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebSite1.Security;
namespace WebSite1
{
public partial class _Default : Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btntiao_Click(object sender, EventArgs e)
{
string tid = "test";
string rsa = RSACryptoProvider.SectionEncrypt(MD5CryptoProvider.Encrypt(tid.ToUpper()), RSA_Keys.Public);
Response.Redirect("About.aspx?tid=" + tid + "&sign=" + Uri.EscapeDataString(rsa));
}
}
}

Salin kode

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebSite1.Security;
namespace WebSite1
{
public partial class About : Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string tid=Request.QueryString["tid"];
string rsa = Request.QueryString["sign"];
if (MD5CryptoProvider.Encrypt(tid.ToUpper()) == RSACryptoProvider.SectionDecrypt(rsa, RSA_Keys.Private))
{
Response.Write("成功!中途没有被修改!");
}
else {
Response.Write("失败!中途被修改过了!");
}
}
}
}
}

Salin kode

Yang ini tidak diberi skor penuh?????

Sampah kecil · Diposting pada 11/12/2015 11.42.55

Musim Panas Dipaparkan pada 2015-12-11 10:51

Benang wol atas terlihat di lantai 4

xiaoweier · Diposting pada 11/12/2015 11.44.33

Xiao Zhazha Posted on 2015-12-11 11:40
Mari kita lihat contohnya terlebih dahulu:

Saya tidak mengerti apa yang Anda lakukan di atas.

musim panas · Diposting pada 11/12/2015 14.07.00

Xiao Zhazha Posted on 2015-12-11 11:42
Benang wol atas terlihat di lantai 4

Sampah kecil · Diposting pada 01/06/2023 20.51.19

c# Dekripsi enkripsi RSA Enkripsi tersegmentasi dan dekripsi tersegmentasi
https://www.itsvse.com/thread-2779-1-1.html

[Sumber] RSA menghasilkan kunci publik dan pribadi, serta enkripsi dan dekripsi

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