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