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💖。
https://github.com/bcgit/bc-csharp
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
