53 lines
1.6 KiB
C#
53 lines
1.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using System.Threading.Tasks;
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namespace Glove {
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public static class CryptoExtensions {
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public static byte[] SHA1(this string str)
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=> Encoding.UTF8.GetBytes(str).SHA1();
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public static byte[] SHA1(this byte[] bytes) {
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using(var hasher = new SHA1CryptoServiceProvider()) {
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return hasher.ComputeHash(bytes);
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}
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}
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public static byte[] MD5(this string str)
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=> Encoding.UTF8.GetBytes(str).MD5();
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public static byte[] MD5(this byte[] bytes) {
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using(var hasher = new MD5CryptoServiceProvider()) {
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return hasher.ComputeHash(bytes);
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}
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}
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private const int HashIterations = 3000;
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public static byte[] HashPassword(this string pwd) {
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byte[] salt, hash = new byte[36];
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RNG.NextBytes(salt = new byte[16]);
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using(var hasher = new Rfc2898DeriveBytes(pwd, salt, HashIterations)) {
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byte[] rawHash = hasher.GetBytes(20);
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Array.Copy(salt, 0, hash, 0, 16);
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Array.Copy(rawHash, 0, hash, 16, 20);
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}
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return hash;
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}
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public static bool CheckPassword(this string pwd, byte[] hash) {
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byte[] salt = hash.Take(16).ToArray();
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using(var hasher = new Rfc2898DeriveBytes(pwd, salt, HashIterations)) {
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byte[] phash = hasher.GetBytes(20);
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return hash.Skip(16).SequenceEqual(phash);
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}
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}
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}
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}
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