95 lines
3.2 KiB
C#
95 lines
3.2 KiB
C#
using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Crypto.Encodings;
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using Org.BouncyCastle.Crypto.Engines;
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using Org.BouncyCastle.Crypto.Generators;
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using Org.BouncyCastle.OpenSsl;
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using Org.BouncyCastle.Security;
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using System;
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using System.IO;
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using System.Text;
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namespace IRaCIS.Core.Infrastructure.Encryption;
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/// <summary>
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/// https://www.cnblogs.com/NBDWDYS2214143926/p/13329231.html
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/// </summary>
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public class RSAEncryption
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{
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public static AsymmetricCipherKeyPair GenerateRSAKeyPair(int keySize)
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{
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var keyGenerationParameters = new KeyGenerationParameters(new SecureRandom(), keySize);
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var keyPairGenerator = new RsaKeyPairGenerator();
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keyPairGenerator.Init(keyGenerationParameters);
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return keyPairGenerator.GenerateKeyPair();
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}
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public static string ExportPublicKey(AsymmetricKeyParameter publicKey)
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{
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using (StringWriter sw = new StringWriter())
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{
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PemWriter pw = new PemWriter(sw);
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pw.WriteObject(publicKey);
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pw.Writer.Flush();
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return sw.ToString();
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}
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}
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public static string ExportPrivateKey(AsymmetricKeyParameter privateKey)
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{
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using (StringWriter sw = new StringWriter())
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{
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PemWriter pw = new PemWriter(sw);
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pw.WriteObject(privateKey);
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pw.Writer.Flush();
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return sw.ToString();
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}
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}
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/// <summary>
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/// RSA解密
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/// </summary>
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/// <param name="privateKey">私钥</param>
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/// <param name="decryptstring">待解密的字符串(Base64)</param>
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/// <returns>解密后的字符串</returns>
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public static string Decrypt(string privateKey, string decryptstring)
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{
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using (TextReader reader = new StringReader(privateKey))
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{
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dynamic key = new PemReader(reader).ReadObject();
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var rsaDecrypt = new Pkcs1Encoding(new RsaEngine());
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if (key is AsymmetricKeyParameter)
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{
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key = (AsymmetricKeyParameter)key;
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}
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else if (key is AsymmetricCipherKeyPair)
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{
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key = ((AsymmetricCipherKeyPair)key).Private;
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}
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rsaDecrypt.Init(false, key); //这里加密是true；解密是false
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byte[] entData = Convert.FromBase64String(decryptstring);
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entData = rsaDecrypt.ProcessBlock(entData, 0, entData.Length);
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return Encoding.UTF8.GetString(entData);
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}
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}/// <summary>
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/// 加密
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/// </summary>
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/// <param name="publicKey">公钥</param>
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/// <param name="encryptstring">待加密的字符串</param>
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/// <returns>加密后的Base64</returns>
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public static string Encrypt(string publicKey, string encryptstring)
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{
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using (TextReader reader = new StringReader(publicKey))
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{
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AsymmetricKeyParameter key = new PemReader(reader).ReadObject() as AsymmetricKeyParameter;
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Pkcs1Encoding pkcs1 = new Pkcs1Encoding(new RsaEngine());
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pkcs1.Init(true, key);//加密是true；解密是false;
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byte[] entData = Encoding.UTF8.GetBytes(encryptstring);
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entData = pkcs1.ProcessBlock(entData, 0, entData.Length);
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return Convert.ToBase64String(entData);
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}
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}
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}
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