50 lines
2.0 KiB
C#
50 lines
2.0 KiB
C#
using System;
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using System.Security.Cryptography;
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using System.Text;
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using System.Net;
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using System.IO;
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namespace pwned_search {
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class Program {
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static void Main(string[] args) {
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Console.Write("Enter the password to check: ");
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string plaintext = Console.ReadLine();
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SHA1 sha = new SHA1CryptoServiceProvider();
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byte[] data = sha.ComputeHash(Encoding.ASCII.GetBytes(plaintext));
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// Loop through each byte of the hashed data
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// and format each one as a hexadecimal string.
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var sBuilder = new StringBuilder();
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for (int i = 0; i < data.Length; i++) {
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sBuilder.Append(data[i].ToString("x2"));
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}
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string result = sBuilder.ToString().ToUpper();
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Console.WriteLine($"The SHA-1 hash of {plaintext} is: {result}");
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// get a list of all the possible passwords where the first 5 digits of the hash are the same
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string url = "https://api.pwnedpasswords.com/range/" + result.Substring(0, 5);
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WebRequest request= WebRequest.Create(url);
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Stream response = request.GetResponse().GetResponseStream();
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StreamReader reader = new StreamReader(response);
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// look at each possibility and compare the rest of the hash to see if there is a match
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string hashToCheck = result.Substring(5);
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while (true) {
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string line = reader.ReadLine();
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if (line == null) {
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Console.WriteLine("That password was not found.");
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break;
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}
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string[] parts = line.Split(':');
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if (parts[0] == hashToCheck) {
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Console.WriteLine("Password has been compromised -- DO NOT USE!");
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break;
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}
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}
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Console.ReadKey(); // pause until key press
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}
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}
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}
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