加解密:MD5DesAesRSARSA C#和Java适配

using System;
using System.Collections.Generic;namespace MyEncrypt
{class Program{//1. MD5 不可逆加密//2. Des 对称可逆加密  目前用Aes代替//3. RSA 非对称可逆加密//4. 数字证书 SSL   --->IIS 安装SSLstatic void Main(string[] args){Console.WriteLine("Hello World!");//MD5Console.WriteLine(MD5Encrypt.EncryptStr("123456小王"));//Desvar encryptStr = DesEncrypt.Encrypt("我们第卅获得首发还是东京评分数据的皮肤");var decryptStr = DesEncrypt.Decrypt(encryptStr);//RsaKeyValuePair<string, string> keyValuePair = RsaEncrypt.GetKeyPair();var rsaEncryptStr = RsaEncrypt.Encrypt("正道的光",keyValuePair.Key);var rsaDecryptStr = RsaEncrypt.Decrypt(rsaEncryptStr, keyValuePair.Value);//CA证书包含：//1.持有者姓名//2.发证机关//3.有效日期//4.证书持有人的公钥  ----这个东西很关键，用这个公钥加密传给对方，如果对方能解密，证明这个证书的确是他的//5.扩展信息//6.发证机关对该证书的数字签名   数字签名=前5点信息的MD5摘要，然后用CA的私钥加密下//单边认证过程：//1.客户端向服务器端请求证书//2.服务器发回证书//3.客户端接收证书并验证：用浏览器内置的发证机关的公钥对证书数字签名解密，用解密出的MD5验证证书未被篡改//4.用证书上的服务器端公钥加密一段内容发送给服务器端//5.服务器端接收加密的内容，并用自己的私钥解密，返回解密后的内容//6.客户端接收返回的内容并验证（到此步骤完成对服务器的验证）//7.客户端再用服务器公钥加密一个 对称可逆加密的密钥 发送给服务器//8.服务器接收,并解密出 对称可逆加密的密钥，开始用这个密钥进行信息传输//双边认证//1到6步和单边认证时一样的//7.客户端发送自己的证书给服务器//8.服务器用客户端证书上的公钥加密内容发送给客户端//9.客户端用自己的私钥解密，返回给服务器端//10.服务器端返回认证结果//后面两步和单边认证7、8步一样}}
}

MD5

using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;//需要引用的加密命名空间
using System.Text;namespace MyEncrypt
{//1.相同原文加密结果是一样的---废话，要不然每次不一样怎么用？//2.不同长度的内容加密后的长度是一样的，计算后都是长度16的字节数组//3.原文差别很小，结果差距很大//4.不管文件大小，摘要为长度16的字节数组 ---  当然了，都是对字节数组计算产生哈希值//5.MD5用途：//  1.防止篡改  //  2.急速秒传  //  3.密码保存，防止看到明文  防止简单密码被破解--> 可以加盐  或者再进行一次MD5计算//  4.SVN代码管理就是用的MD5  文件修改后跟本地该文件之前的MD5不一致了，就认为文件改动了//  5.数字签名  文件交由权威第三方，第三方出一个MD5 -->防止抵赖public class MD5Encrypt{/// <summary>/// MD5加密字符串，和动网上的16/32位加密结果相同/// </summary>/// <param name="source"></param>/// <param name="len">输出的字符串长度</param>/// <returns></returns>public static string EncryptStr(string source, int len = 32){if (string.IsNullOrEmpty(source))return string.Empty;byte[] bytes = Encoding.UTF8.GetBytes(source);//这里需要编码，不同编码产生的字节数组不同，所以最后MD5哈希值就不同了//两种写法都行，下面直接用MD5的对象更简单HashAlgorithm hashAlgorithm = CryptoConfig.CreateFromName("MD5") as HashAlgorithm;byte[] hashValue = hashAlgorithm.ComputeHash(bytes);//这种更简单好记//MD5 mD5 = MD5.Create();//byte[] hashValue = mD5.ComputeHash(bytes);StringBuilder sb = new StringBuilder();switch (len){case 16://16位密文是32位的9到24位字符for (int i = 4; i < 12; i++){sb.Append(hashValue[i].ToString("x2"));}break;case 32:for (int i = 0; i < 16; i++){sb.Append(hashValue[i].ToString("x2"));}break;default:for (int i = 0; i < hashValue.Length; i++){sb.Append(hashValue[i].ToString("x2"));}break;}return sb.ToString();}/// <summary>/// 获取文件摘要/// </summary>/// <param name="fileName"></param>/// <returns></returns>public static string AbstractFile(string fileName){if (string.IsNullOrEmpty(fileName) || !File.Exists(fileName))return string.Empty;using (FileStream fileStream = File.OpenRead(fileName)){return AbstractFile(fileStream);}}/// <summary>/// 根据流获取摘要/// </summary>/// <param name="stream"></param>/// <returns></returns>public static string AbstractFile(Stream stream){MD5 mD5 = new MD5CryptoServiceProvider();//MD5 mD5 = MD5.Create();//同样的，MD5可以这样方便好记的写法byte[] bytes = mD5.ComputeHash(stream);StringBuilder sb = new StringBuilder();foreach (byte item in bytes){sb.Append(item.ToString("x2"));}return sb.ToString();}}
}

Des

using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using System.Text;namespace MyEncrypt
{//数据的加密传输  //加密速度快  //但是存在密钥安全性问题，不管哪一方泄露密钥，内容都会被破解，或者说密钥传输是不安全的//目前采用Aes加密代替了Despublic class DesEncrypt{/// <summary>/// 加密key 长度8,因为算法只需要8位/// </summary>private static byte[] rgbKey = ASCIIEncoding.ASCII.GetBytes("wchen1234".Substring(0, 8));/// <summary>/// 向量/// </summary>private static byte[] rgbIV = ASCIIEncoding.ASCII.GetBytes("wchen1234".Insert(0, "h").Substring(0, 8));/// <summary>/// DES加密/// </summary>/// <param name="text"></param>/// <returns></returns>public static string Encrypt(string text){//1.得到一个DES加密对象DESCryptoServiceProvider des = new DESCryptoServiceProvider();//2.得到一个内存流using (MemoryStream ms = new MemoryStream()){//3.用内存流做参数，实例化个加密流CryptoStream cryptoStream = new CryptoStream(ms, des.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);//多加一个写入流看着比较烦//{//    //4.用加密流做参数实例化 写入流//    StreamWriter sw = new StreamWriter(cryptoStream);//    //5.写入流写入//    sw.Write(text);//    sw.Flush();//}//这种看着清爽{//4.把字符串转成字节数组byte[] bytes = Encoding.UTF8.GetBytes(text);//5.加密流写入字节数组cryptoStream.Write(bytes, 0, bytes.Length);}cryptoStream.FlushFinalBlock();ms.Flush();return Convert.ToBase64String(ms.ToArray());//return Convert.ToBase64String(ms.GetBuffer(), 0, ms.GetBuffer().Length);}}/// <summary>/// DES解密/// </summary>/// <param name="text"></param>/// <returns></returns>public static string Decrypt(string text){DESCryptoServiceProvider des = new DESCryptoServiceProvider();//des.Key = rgbKey;//des.IV = rgbIV;byte[] bytes = Convert.FromBase64String(text);using (MemoryStream ms = new MemoryStream()){CryptoStream cryptoStream = new CryptoStream(ms, des.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);cryptoStream.Write(bytes, 0, bytes.Length);cryptoStream.FlushFinalBlock();ms.Flush();return Encoding.UTF8.GetString(ms.ToArray());}}}
}

Rsa

using System;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.Text;namespace MyEncrypt
{//非对称可逆加密//1.算法公开//2.密钥是一对，加密密钥--解密密钥  加密密钥-->经过算法加密-->解密密钥-->算法解密-->原文//3.安全性好//用途：//  1.数字签名：公开解密key,我的文件用加密key加密，凡是别人能解密的-->肯定是我的文件//  2.数据安全传输：公开加密key,密文只有我能解密，不怕别人拦截//4.C#　只实现了公钥加密，私钥解密　　　没实现私钥加密，公钥解密//  第三方BouncyCastle.Crypto.dll 实现两个public class RsaEncrypt{/// <summary>/// 获取密钥对/// </summary>/// <returns></returns>public static KeyValuePair<string, string> GetKeyPair(){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();string publicKey = rsa.ToXmlString(false);string privateKey = rsa.ToXmlString(true);//string sss = rsa.ToXmlString(true);//var jjj = privateKey.Equals(sss); 同一个对象产生的 公钥私钥是一样的，不同对象之间是不同的//Console.WriteLine(privateKey);//Console.WriteLine(sss);//RSACryptoServiceProvider rsa1 = new RSACryptoServiceProvider();//string publicKey1 = rsa1.ToXmlString(false);//string privateKey1 = rsa1.ToXmlString(true);//string sss1 = rsa1.ToXmlString(true);//var jjj1 = privateKey1.Equals(sss1);//Console.WriteLine(privateKey1);//Console.WriteLine(sss1);//var ggg = privateKey.Equals(privateKey1);return new KeyValuePair<string, string>(publicKey, privateKey);}/// <summary>/// RSA加密/// </summary>/// <param name="text"></param>/// <param name="encryptKey"></param>/// <returns></returns>public static string Encrypt(string text, string encryptKey){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();rsa.FromXmlString(encryptKey);UnicodeEncoding byteConverter = new UnicodeEncoding(); //Unicode = UTF-16byte[] bytes = byteConverter.GetBytes(text);byte[] encryptByteArr = rsa.Encrypt(bytes, false);return Convert.ToBase64String(encryptByteArr);}/// <summary>/// RSA解密/// </summary>/// <param name="text"></param>/// <param name="decryptKey"></param>/// <returns></returns>public static string Decrypt(string text, string decryptKey){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();rsa.FromXmlString(decryptKey);byte[] bytes = Convert.FromBase64String(text);byte[] decryptByteArr = rsa.Decrypt(bytes, false);return new UnicodeEncoding().GetString(decryptByteArr);}}
}

Rsa C#适配Java

using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.X509;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Xml;namespace LoginToADBusiness.Helper
{public class RsaCryptography{public static void chek(){var key = RSAPublicKeyDotNet2Java(public_Key);string content = "123qwe!@#";string jm = Encrypt(content);string rst = Decrypt(jm);}//private static string public_Key = "BgIAAACkAABSU0ExAAQAAAEAAQBxMpX4WVaMaBcGHGOTqm0AwLDobtld0AJdlpNBL4hYLh5xyERQfmWYcPCglzhi4j5v3cXuniGrD2C+786tAqSSWH6fjESp9i9cpLP9zvl2ocFiuWW4dkxMt0LwaGcZFW191nOyzjI//ki0z5h3CpzWE7rmKCd0ET8hs+3MHuRZ0A==";//private static string private_Key = "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";private static string public_Key = "<RSAKeyValue><Modulus>vOI41rYkLEgWFGnm8fZ5/rR2pV1ZkjjW5yfVDO7zXO5MbDatNa4/xUu3Io7/mlwSNYLGBAHKcT0P4L5m4Cp+waCxq6E1d4DHv43/IUTvzTLZAH/TEILjTrAuWa3DoSkyO+iaixf1jCui1p6XHSGVUrtZjGboUaRkNL8IKN8ETjU=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";private static string private_Key = "<RSAKeyValue><Modulus>vOI41rYkLEgWFGnm8fZ5/rR2pV1ZkjjW5yfVDO7zXO5MbDatNa4/xUu3Io7/mlwSNYLGBAHKcT0P4L5m4Cp+waCxq6E1d4DHv43/IUTvzTLZAH/TEILjTrAuWa3DoSkyO+iaixf1jCui1p6XHSGVUrtZjGboUaRkNL8IKN8ETjU=</Modulus><Exponent>AQAB</Exponent><P>/1pV/r6cqcBz2APOikC/cq+YTN5VnUrkMY1/B/rrB3W5SI8YTQj9le7kndn1ib689os3hOzrs09ezflShnT0pw==</P><Q>vVzDYSs+XdqPNc90Ii2bKo8/bLk0AbcoLZrb++N+Jed05iNZin4nRsCU082wBllhTkoylilY+bQBPt3z8YnVww==</Q><DP>bi4WaQLqKjzGP3D1D6Z8dQnbV1+f5WzJJbB+HX1hKCjdt7c2rxawBJ+9uXawgazxcBgF7q8jzIz0xT9NIoMYhQ==</DP><DQ>L4xDYvrAxkBDBXf56TsaYy1k95/pdyTOaeUgp7cPzeS4bbEioqvaoOFqfWSAdpeq30WyPhJTzR9t0KNaxaOekQ==</DQ><InverseQ>Saf+qvS2+eHYWp0xzuB5OLEskKexhtVQd95CFOyXKiMirrkHOuCb3mycRGrXIUK4GHmuT6jLWk6YrSE8RC/IIg==</InverseQ><D>B8h4mBxcRDjaNBAjFJBX+Y9dHjZJBRXzgQXqqQRFoewt2P2tyHr8JLiYfMOQs78cfvj7CNo8Cct+1n9yBMWrgGO4BQPMxk9V8RSE+kClgN+6QPjeJhJIy29ERHiiudpWLqEc98FoazhdHddGrNIhayKBElq2dpNQ+aK4EfQ1zXc=</D></RSAKeyValue>";//C#和java的密钥格式不同，转格式需引用类库BouncyCastle.Crypto/// <summary>/// 生成一对公钥和私钥/// </summary>/// <returns></returns>public static KeyValuePair<string, string> GetKeyPair1(){RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();string publicKey = RSA.ToXmlString(false);string privateKey = RSA.ToXmlString(true);//string public_Key = Convert.ToBase64String(RSA.ExportCspBlob(false));//string private_Key = Convert.ToBase64String(RSA.ExportCspBlob(true));return new KeyValuePair<string, string>(public_Key, private_Key);}/// <summary>/// RSA私钥格式转换，.net->java/// </summary>/// <param name="privateKey">.net生成的私钥</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公钥格式转换，.net->java    /// </summary>    /// <param name="publicKey">.net生成的公钥</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);}/// <summary>/// RSA加密   C#版，密钥格式不带标签/// </summary>/// <param name="publickey"></param>/// <param name="content"></param>/// <returns></returns>public static string RSAEncrypt(string content){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();byte[] cipherbytes;rsa.ImportCspBlob(Convert.FromBase64String(public_Key));cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false);return Convert.ToBase64String(cipherbytes);}/// <summary>/// RSA解密   C#版，密钥格式不带标签/// </summary>/// <param name="privatekey"></param>/// <param name="content"></param>/// <returns></returns>public static string RSADecrypt(string content){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();byte[] cipherbytes;rsa.ImportCspBlob(Convert.FromBase64String(private_Key));cipherbytes = rsa.Decrypt(Convert.FromBase64String(content), false);return Encoding.UTF8.GetString(cipherbytes);}/// <summary>/// RSA加密  适配java，用的密钥格式xml/// </summary>/// <param name="text"></param>/// <param name="encryptKey"></param>/// <returns></returns>public static string Encrypt(string text){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();rsa.FromXmlString(public_Key);byte[] bytes = Encoding.UTF8.GetBytes(text);byte[] encryptByteArr = rsa.Encrypt(bytes, false);return Convert.ToBase64String(encryptByteArr);}/// <summary>/// RSA解密   适配java，用的密钥格式xml/// </summary>/// <param name="text"></param>/// <param name="decryptKey"></param>/// <returns></returns>public static string Decrypt(string text){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();rsa.FromXmlString(private_Key);byte[] bytes = Convert.FromBase64String(text);byte[] decryptByteArr = rsa.Decrypt(bytes, false);return Encoding.UTF8.GetString(decryptByteArr);}}
}

Aes

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;namespace LoginToADBusiness.Helper
{public class AESCryptography{/// <summary>/// 获取密钥/// </summary>private static string Key{get { return @"mailyimidida0com"; }}/// <summary>/// 获取向量/// </summary>private static string IV{get { return @"owayimidida12345"; }}/// <summary>/// AES加密/// </summary>/// <param name="plainStr">明文字符串</param>/// <returns>密文</returns>public static string AESEncrypt(string plainStr){if (string.IsNullOrEmpty(plainStr))return string.Empty;byte[] bKey = Encoding.UTF8.GetBytes(Key);byte[] bIV = Encoding.UTF8.GetBytes(IV);byte[] byteArray = Encoding.UTF8.GetBytes(plainStr);string encrypt = null;Rijndael aes = Rijndael.Create();//双方要采用一致的运算模式和填充模式aes.Mode = CipherMode.CBC;aes.Padding = PaddingMode.Zeros;try{using (MemoryStream mStream = new MemoryStream()){using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(bKey, bIV), CryptoStreamMode.Write)){cStream.Write(byteArray, 0, byteArray.Length);cStream.FlushFinalBlock();encrypt = Convert.ToBase64String(mStream.ToArray());}}}catch (Exception e){ throw e; }aes.Clear();return encrypt;}/// <summary>/// AES解密/// </summary>/// <param name="encryptStr">密文字符串</param>/// <returns>明文</returns>public static string AESDecrypt(string encryptStr){if (string.IsNullOrEmpty(encryptStr))return string.Empty;byte[] bKey = Encoding.UTF8.GetBytes(Key);byte[] bIV = Encoding.UTF8.GetBytes(IV);byte[] byteArray = Convert.FromBase64String(encryptStr);string decrypt = null;Rijndael aes = Rijndael.Create();//双方要采用一致的运算模式和填充模式aes.Mode = CipherMode.CBC;aes.Padding = PaddingMode.Zeros;try{using (MemoryStream mStream = new MemoryStream()){using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(bKey, bIV), CryptoStreamMode.Write)){cStream.Write(byteArray, 0, byteArray.Length);cStream.FlushFinalBlock();decrypt = Encoding.UTF8.GetString(mStream.ToArray());}}}catch (Exception e){ throw e; }aes.Clear();return decrypt.Replace("\0", "");}}
}

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