C#實現各種Hash計算

涉及框架及庫

自己在NuGet管理器里面安裝即可

• BouncyCastle.Cryptography：是加密算法和協議的.NET實現。

目前支持可計算的類型

• BLAKE2B_160
• BLAKE2B_256
• BLAKE2B_384
• BLAKE2B_512
• BLAKE2S_128
• BLAKE2S_160
• BLAKE2S_224
• BLAKE2S_256
• BLAKE3_256
• DSTU7564_256
• DSTU7564_384
• DSTU7564_512
• GOST3411
• GOST3411_2012_256
• GOST3411_2012_512
• KECCAK_224
• KECCAK_256
• KECCAK_288
• KECCAK_384
• KECCAK_512
• MD2
• MD4
• MD5
• RIPEMD128
• RIPEMD160
• RIPEMD256
• RIPEMD320
• SHA_1
• SHA_224
• SHA_256
• SHA_384
• SHA_512
• SHA_512_224
• SHA_512_256
• SHA3_224
• SHA3_256
• SHA3_384
• SHA3_512
• SHAKE128_256
• SHAKE256_512
• SM3
• TIGER
• WHIRLPOOL

核心代碼

1. 根據對應的算法名稱獲取用以計算哈希的對象

var digest = DigestUtilities.GetDigest("md5");

2. 將需要計算的字符串轉換為字節數組

var pla = "1234";
var inBytes = Encoding.UTF8.GetBytes(pla);

其它數據源

• 文件

File.ReadAllBytes(filepath);

• Hex字符串

Hex.Decode(pla);

• Base64

Convert.FromBase64String(pla);

• Stream流

using (Stream stream = new MemoryStream())
{stream.Read(inBytes, 0, (int)stream.Length);
}

3. 計算Hash

// 獲取輸出字節數組大小
var outlen = digest.GetDigestSize();// 實例化一個接受輸出結果的字節數組
var outBytes = new byte[outlen];// 數據搞里頭
digest.BlockUpdate(inBytes, 0, inBytes.Length);// 結果搞出來
digest.DoFinal(outBytes, 0);// 打印Hash值
Console.WriteLine($"{Hex.ToHexString(outBytes)}"); 

完整可運行代碼

private static string[] testDigests => new string []
{"BLAKE2B_160","BLAKE2B_256","BLAKE2B_384","BLAKE2B_512","BLAKE2S_128","BLAKE2S_160","BLAKE2S_224","BLAKE2S_256","BLAKE3_256","DSTU7564_256","DSTU7564_384","DSTU7564_512","GOST3411","GOST3411_2012_256","GOST3411_2012_512","KECCAK_224","KECCAK_256","KECCAK_288","KECCAK_384","KECCAK_512","MD2","MD4","MD5","RIPEMD128","RIPEMD160","RIPEMD256","RIPEMD320","SHA_1","SHA_224","SHA_256","SHA_384","SHA_512","SHA_512_224","SHA_512_256","SHA3_224","SHA3_256","SHA3_384","SHA3_512","SHAKE128_256","SHAKE256_512","SM3","TIGER","WHIRLPOOL",
}; static void Main(string[] args)
{IDigest digest = DigestUtilities.GetDigest("md5");var pla = "1234";var inBytes = Encoding.UTF8.GetBytes(pla);Console.ForegroundColor = ConsoleColor.Green;Console.Write($"明文消息");Console.ForegroundColor = ConsoleColor.White;Console.WriteLine($":{pla}{Environment.NewLine}");for (int i = 0; i < testDigests.Length; i++){digest = DigestUtilities.GetDigest(testDigests[i]);var outlen = digest.GetDigestSize();var outBytes = new byte[outlen];digest.BlockUpdate(inBytes, 0, inBytes.Length);digest.DoFinal(outBytes, 0);Console.ForegroundColor = ConsoleColor.Green;Console.Write($"{digest.AlgorithmName}");Console.ForegroundColor = ConsoleColor.White;Console.WriteLine($":{Hex.ToHexString(outBytes)}");}Console.ReadKey();
}

運行結果：

BCrypt

直接上代碼片段，應該不難理解

char[] pw = "123".ToCharArray();
byte[] salt = new byte[16];
var rng = new SecureRandom();
rng.NextBytes(salt);
var cost = 10;
var hash = OpenBsdBCrypt.Generate(pw, salt, cost);
var hash2 = OpenBsdBCrypt.Generate("2a", pw, salt, cost);
Console.WriteLine($"{hash}");
Console.WriteLine($"{hash2}");

目前支持的的版本有：2a、2b、2y(默認)
運行結果：

在線校驗一遍

總結

1. 注意Base64的轉換，C#對Base64的格式檢驗的較為嚴格，可能會因為字符數不夠或有非法字符，從而導致Base64在轉換為字節數組時報錯，需要修正一下格式。（方法自行百度）