citizen-VM
8d5c8e59fb
* rm button for manual hash computation * add method for computing hash from string * add method for deciding whether hash of the msg in msg box equals hash of msg in the file (if loaded) and show a warning label when msg changes
85 lines
2.6 KiB
C#
85 lines
2.6 KiB
C#
using System;
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using System.IO;
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using System.Numerics;
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using System.Security.Cryptography;
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using System.Text;
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using System.Windows.Forms;
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namespace KRY_0x04
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{
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class Dsapls
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{
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internal string sha256sum_from_path(string path)
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{
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string sha256sum = "";
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try
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{
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FileStream my_filestream = File.OpenRead(path);
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SHA256Managed my_sha_256_managed = new SHA256Managed();
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byte[] byte_array_of_sha256 = my_sha_256_managed.ComputeHash(my_filestream);
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sha256sum = BitConverter.ToString(byte_array_of_sha256).Replace("-", string.Empty).ToLower();
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my_filestream.Close();
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my_sha_256_managed.Clear();
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}
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catch (Exception e)
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{
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show_exc_msgbox(e.ToString());
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}
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return sha256sum;
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}
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internal string sha256sum_from_string(string text)
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{
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string sha256sum = "";
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try
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{
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SHA256Managed sha256_provider = new SHA256Managed();
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byte[] bytes = Encoding.UTF8.GetBytes(text);
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byte[] hash = sha256_provider.ComputeHash(bytes);
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sha256sum = BitConverter.ToString(hash).Replace("-", string.Empty).ToLower();
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}
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catch (Exception e)
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{
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show_exc_msgbox(e.ToString());
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}
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return sha256sum;
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}
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internal string get_file_metrics(string filename)
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{
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string metrics = "";
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metrics += $"created: " + $"{File.GetCreationTime(filename)}" + Environment.NewLine;
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metrics += $"file type: " + $"{Path.GetExtension(filename)}";
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return metrics;
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}
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internal BigInteger return_bigint_representation_of_message(string input)
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{
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byte[] part_of_message = Encoding.ASCII.GetBytes(input);
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return new BigInteger(part_of_message);
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}
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internal string return_string_representation_of_bigint(BigInteger bA_number)
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{
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byte[] decrypted_b_a = bA_number.ToByteArray();
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string decrypted_text = "";
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for (int i = 0; i < decrypted_b_a.Length; i++)
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{
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decrypted_text += Convert.ToString(Convert.ToChar(decrypted_b_a[i]));
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}
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return decrypted_text;
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}
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private void show_exc_msgbox(string e)
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{
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MessageBox.Show("https://xkcd.com/2200 \nerror: " + e, "this should never have happened", MessageBoxButtons.OK, MessageBoxIcon.Error);
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}
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}
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}
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