C#实现各种Hash计算

涉及框架及库

自己在NuGet管理器里面安装即可

• BouncyCastle.Cryptography：是加密算法和协议的.NET实现。

目前支持可计算的类型

• 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

核心代码

1. 根据对应的算法名称获取用以计算哈希的对象

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

2. 将需要计算的字符串转换为字节数组

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

其它数据源

• 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. 计算Hash

// 获取输出字节数组大小
var outlen = digest.GetDigestSize();

// 实例化一个接受输出结果的字节数组
var outBytes = new byte[outlen];

// 数据搞里头
digest.BlockUpdate(inBytes, 0, inBytes.Length);

// 结果搞出来
digest.DoFinal(outBytes, 0);

// 打印Hash值
Console.WriteLine($"{Hex.ToHexString(outBytes)}"); 

完整可运行代码

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();
}

运行结果：

BCrypt

直接上代码片段，应该不难理解

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(默认)
运行结果：

在线校验一遍

总结

1. 注意Base64的转换，C#对Base64的格式检验的较为严格，可能会因为字符数不够或有非法字符，从而导致Base64在转换为字节数组时报错，需要修正一下格式。（方法自行百度）