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（包括对称加密、非对称加密、哈希函数、数字签名等）。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
DotNetGuide技术社区交流群
- DotNetGuide技术社区是一个面向.NET开发者的开源技术社区，旨在为开发者们提供全面的C#/.NET/.NET Core相关学习资料、技术分享和咨询、项目推荐、招聘资讯和解决问题的平台。
- 在这个社区中，开发者们可以分享自己的技术文章、项目经验、遇到的疑难技术问题以及解决方案，并且还有机会结识志同道合的开发者。
- 我们致力于构建一个积极向上、和谐友善的.NET技术交流平台，为广大.NET开发者带来更多的价值和成长机会。