# Work with SHA1 in C#

in this project you see how to work with SHA1 cryptographic hash function. for example get hash from string and how to crack SHA1 hash.

source compelete on github: https://github.com/mahdiabasi/SHA1Tool (opens new window)

# #Generate SHA1 checksum of a file

first you add System.Security.Cryptography namespace to your project

public string GetSha1Hash(string filePath)
        using (FileStream fs = File.OpenRead(filePath))
            SHA1 sha = new SHA1Managed();
            return BitConverter.ToString(sha.ComputeHash(fs));

# #Generate hash of a text

 public static string TextToHash(string text)
        var sh = SHA1.Create();
        var hash = new StringBuilder();
        byte[] bytes = Encoding.UTF8.GetBytes(text);
        byte[] b = sh.ComputeHash(bytes);
        foreach (byte a in b)
            var h = a.ToString("x2");
        return hash.ToString();