前言
今天大姚给大家分享一款C#版开源、免费的Bouncy Castle密码库：BouncyCastle。
项目介绍
BouncyCastle是一款C#版开源、免费的Bouncy Castle密码库，开发人员可以通过该项目在他们的 C# 应用程序中使用 Bouncy Castle 提供的各种密码学功能，从而加强数据的安全性和保护隐私信息。
Bouncy Castle密码学库介绍
Bouncy Castle是一个流行的密码学库，提供了广泛的密码算法和协议的实现。它由澳大利亚注册的慈善组织“Bouncy Castle军团”开发，旨在提供可靠而安全的加密解决方案。
项目源代码
创建控制台应用
创建一个名为：BouncyCastleExercise的控制台。 
安装BouncyCastle包
搜索名为：BouncyCastle.Cryptography包安装：
BouncyCastle使用示例
internal class Program { static void Main(string[] args) { #region AES加密解密示例 string aesPlaintext = "Hello, 追逐时光者！！！"; byte[] aesKey = new byte[16]; byte[] aesIV = new byte[16]; byte[] aesCiphertext = EncryptAES(aesPlaintext, aesKey, aesIV); string decryptedAesPlaintext = DecryptAES(aesCiphertext, aesKey, aesIV); Console.WriteLine("AES plaintext: " + aesPlaintext); Console.WriteLine("AES ciphertext: " + Convert.ToBase64String(aesCiphertext)); Console.WriteLine("Decrypted AES plaintext: " + decryptedAesPlaintext); #endregion #region DES 加密解密示例 string desPlaintext = "Hello, DES!"; byte[] desKey = new byte[8]; byte[] desIV = new byte[8]; byte[] desCiphertext = EncryptDES(desPlaintext, desKey, desIV); string decryptedDesPlaintext = DecryptDES(desCiphertext, desKey, desIV); Console.WriteLine("DES plaintext: " + desPlaintext); Console.WriteLine("DES ciphertext: " + Convert.ToBase64String(desCiphertext)); Console.WriteLine("Decrypted DES plaintext: " + decryptedDesPlaintext); #endregion #region RC4 加密解密示例 string rc4Plaintext = "Hello, RC4!"; byte[] rc4Key = new byte[16]; byte[] rc4Ciphertext = EncryptRC4(rc4Plaintext, rc4Key); string decryptedRc4Plaintext = DecryptRC4(rc4Ciphertext, rc4Key); Console.WriteLine("RC4 plaintext: " + rc4Plaintext); Console.WriteLine("RC4 ciphertext: " + Convert.ToBase64String(rc4Ciphertext)); Console.WriteLine("Decrypted RC4 plaintext: " + decryptedRc4Plaintext); #endregion #region 哈希算法示例 // MD5 示例 string md5Plaintext = "Hello, MD5!"; string md5Hash = CalculateMD5Hash(md5Plaintext); Console.WriteLine("MD5 hash of 'Hello, MD5!': " + md5Hash); // SHA1 示例 string sha1Plaintext = "Hello, SHA1!"; string sha1Hash = CalculateSHA1Hash(sha1Plaintext); Console.WriteLine("SHA1 hash of 'Hello, SHA1!': " + sha1Hash); // SHA256 示例 string sha256Plaintext = "Hello, SHA256!"; string sha256Hash = CalculateSHA256Hash(sha256Plaintext); Console.WriteLine("SHA256 hash of 'Hello, SHA256!': " + sha256Hash); #endregion } #region AES加密解密示例 /// <summary> /// AES 加密方法 /// </summary> /// <param name="plaintext">plaintext</param> /// <param name="key">key</param> /// <param name="iv">iv</param> /// <returns></returns> public static byte[] EncryptAES(string plaintext, byte[] key, byte[] iv) { IBufferedCipher cipher = CipherUtilities.GetCipher("AES/CTR/PKCS7Padding"); cipher.Init(true, new ParametersWithIV(ParameterUtilities.CreateKeyParameter("AES", key), iv)); return cipher.DoFinal(System.Text.Encoding.UTF8.GetBytes(plaintext)); } /// <summary> /// AES 解密方法 /// </summary> /// <param name="ciphertext">ciphertext</param> /// <param name="key">key</param> /// <param name="iv">iv</param> /// <returns></returns> public static string DecryptAES(byte[] ciphertext, byte[] key, byte[] iv) { IBufferedCipher cipher = CipherUtilities.GetCipher("AES/CTR/PKCS7Padding"); cipher.Init(false, new ParametersWithIV(ParameterUtilities.CreateKeyParameter("AES", key), iv)); byte[] plaintext = cipher.DoFinal(ciphertext); return System.Text.Encoding.UTF8.GetString(plaintext); } #endregion #region DES 加密解密示例 /// <summary> /// DES 加密方法 /// </summary> /// <param name="plaintext">plaintext</param> /// <param name="key">key</param> /// <param name="iv">iv</param> /// <returns></returns> public static byte[] EncryptDES(string plaintext, byte[] key, byte[] iv) { IBufferedCipher cipher = CipherUtilities.GetCipher("DES/CBC/PKCS7Padding"); cipher.Init(true, new ParametersWithIV(ParameterUtilities.CreateKeyParameter("DES", key), iv)); return cipher.DoFinal(System.Text.Encoding.UTF8.GetBytes(plaintext)); } /// <summary> /// DES 解密方法 /// </summary> /// <param name="ciphertext">ciphertext</param> /// <param name="key">key</param> /// <param name="iv">iv</param> /// <returns></returns> public static string DecryptDES(byte[] ciphertext, byte[] key, byte[] iv) { IBufferedCipher cipher = CipherUtilities.GetCipher("DES/CBC/PKCS7Padding"); cipher.Init(false, new ParametersWithIV(ParameterUtilities.CreateKeyParameter("DES", key), iv)); byte[] plaintext = cipher.DoFinal(ciphertext); return System.Text.Encoding.UTF8.GetString(plaintext); } #endregion #region RC4 加密解密示例 /// <summary> /// RC4 加密方法 /// </summary> /// <param name="plaintext">plaintext</param> /// <param name="key">key</param> /// <returns></returns> public static byte[] EncryptRC4(string plaintext, byte[] key) { IStreamCipher cipher = new RC4Engine(); cipher.Init(true, new KeyParameter(key)); byte[] data = System.Text.Encoding.UTF8.GetBytes(plaintext); byte[] ciphertext = new byte[data.Length]; cipher.ProcessBytes(data, 0, data.Length, ciphertext, 0); return ciphertext; } /// <summary> /// RC4 解密方法 /// </summary> /// <param name="ciphertext">ciphertext</param> /// <param name="key">key</param> /// <returns></returns> public static string DecryptRC4(byte[] ciphertext, byte[] key) { IStreamCipher cipher = new RC4Engine(); cipher.Init(false, new KeyParameter(key)); byte[] plaintext = new byte[ciphertext.Length]; cipher.ProcessBytes(ciphertext, 0, ciphertext.Length, plaintext, 0); return System.Text.Encoding.UTF8.GetString(plaintext); } #endregion #region 哈希算法示例 /// <summary> /// 计算 MD5 哈希 /// </summary> /// <param name="input">input</param> /// <returns></returns> public static string CalculateMD5Hash(string input) { IDigest digest = new MD5Digest(); byte[] hash = new byte[digest.GetDigestSize()]; byte[] data = System.Text.Encoding.UTF8.GetBytes(input); digest.BlockUpdate(data, 0, data.Length); digest.DoFinal(hash, 0); return Convert.ToBase64String(hash); } /// <summary> /// 计算 SHA1 哈希 /// </summary> /// <param name="input">input</param> /// <returns></returns> public static string CalculateSHA1Hash(string input) { IDigest digest = new Sha1Digest(); byte[] hash = new byte[digest.GetDigestSize()]; byte[] data = System.Text.Encoding.UTF8.GetBytes(input); digest.BlockUpdate(data, 0, data.Length); digest.DoFinal(hash, 0); return Convert.ToBase64String(hash); } /// <summary> /// 计算 SHA256 哈希 /// </summary> /// <param name="input">input</param> /// <returns></returns> public static string CalculateSHA256Hash(string input) { IDigest digest = new Sha256Digest(); byte[] hash = new byte[digest.GetDigestSize()]; byte[] data = System.Text.Encoding.UTF8.GetBytes(input); digest.BlockUpdate(data, 0, data.Length); digest.DoFinal(hash, 0); return Convert.ToBase64String(hash); } #endregion }
输出结果：
项目源码地址
更多项目实用功能和特性欢迎前往项目开源地址查看👀，别忘了给项目一个Star支持💖。
优秀项目和框架精选
该项目已收录到C#/.NET/.NET Core优秀项目和框架精选中，关注优秀项目和框架精选能让你及时了解C#、.NET和.NET Core领域的最新动态和最佳实践，提高开发工作效率和质量。坑已挖，欢迎大家踊跃提交PR推荐或自荐（让优秀的项目和框架不被埋没🤞）。
https://github.com/YSGStudyHards/DotNetGuide/blob/main/docs/DotNet/DotNetProjectPicks.md
