分类:
.net core
前言
在配置文件中,数据库连接字符串,缓存链接字符串等敏感信息,需要配置成加密形式。今天记录一下工作经验
我使用的是RSA加密
先安装依赖包
首先生成公钥私钥
公钥与私钥是匹配的,公钥加密过后使用对应的私钥进行解密
/// <summary> /// 生成PEM格式的公钥和密钥 /// </summary> /// <param name="strength">长度</param> /// <returns>Item1:公钥;Item2:私钥;</returns> public static (string, string) CreateKeyPair(int strength = 1024) { RsaKeyPairGenerator r = new RsaKeyPairGenerator(); r.Init(new KeyGenerationParameters(new SecureRandom(), strength)); AsymmetricCipherKeyPair keys = r.GenerateKeyPair(); TextWriter privateTextWriter = new StringWriter(); PemWriter privatePemWriter = new PemWriter(privateTextWriter); privatePemWriter.WriteObject(keys.Private); privatePemWriter.Writer.Flush(); TextWriter publicTextWriter = new StringWriter(); PemWriter publicPemWriter = new PemWriter(publicTextWriter); publicPemWriter.WriteObject(keys.Public); publicPemWriter.Writer.Flush(); return (publicTextWriter.ToString(), privateTextWriter.ToString()); }
RSA加密算法
/// <summary> /// RSA加密 /// </summary> /// <param name="publicKey">公钥</param> /// <param name="decryptstring">待加密的字符串(Base64)</param> /// <returns>加密后的字符串</returns> public static string Crypt(string publicKey, string decryptstring) { decryptstring = Convert.ToBase64String(System.Text.Encoding.Default.GetBytes(decryptstring)); using (TextReader reader = new StringReader(publicKey)) { dynamic key = new PemReader(reader).ReadObject(); var rsaDecrypt = new Pkcs1Encoding(new RsaEngine()); if (key is AsymmetricKeyParameter) { key = (AsymmetricKeyParameter)key; } else if (key is AsymmetricCipherKeyPair) { key = ((AsymmetricCipherKeyPair)key).Private; } rsaDecrypt.Init(true, key); //这里加密是true;解密是false byte[] entData = Convert.FromBase64String(decryptstring); entData = rsaDecrypt.ProcessBlock(entData, 0, entData.Length); return Convert.ToBase64String(entData); } }
RSA解密算法
/// <summary> /// RSA解密,解密失败返回原字符串 /// </summary> /// <param name="privateKey">私钥</param> /// <param name="decryptstring">待解密的字符串(Base64)</param> /// <returns>解密后的字符串</returns> public static string Decrypt(string privateKey, string decryptstring) { try { using (TextReader reader = new StringReader(privateKey)) { dynamic key = new PemReader(reader).ReadObject(); var rsaDecrypt = new Pkcs1Encoding(new RsaEngine()); if (key is AsymmetricKeyParameter) { key = (AsymmetricKeyParameter)key; } else if (key is AsymmetricCipherKeyPair) { key = ((AsymmetricCipherKeyPair)key).Private; } rsaDecrypt.Init(false, key); //这里加密是true;解密是false byte[] entData = Convert.FromBase64String(decryptstring); entData = rsaDecrypt.ProcessBlock(entData, 0, entData.Length); return Encoding.UTF8.GetString(entData); } } catch (Exception e) { return decryptstring; } }
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