52 lines
2.4 KiB
C#
52 lines
2.4 KiB
C#
using System;
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using System.IO;
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using System.Security.Cryptography;
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using System.Text;
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namespace App1 {
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class encryption {
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static readonly string PasswordHash = "P@@Sw0rd"; //password hash
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static readonly string SaltKey = "S@LT&KEY";
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static readonly string VIKey = "@1B2c3D4e5F6g7H8";
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public string Encrypt(string plainText) //encryot plaintext
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{
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byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
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byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
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var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.Zeros };
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var encryptor = symmetricKey.CreateEncryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
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byte[] cipherTextBytes;
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using (var memoryStream = new MemoryStream()) {
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using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write)) {
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cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
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cryptoStream.FlushFinalBlock();
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cipherTextBytes = memoryStream.ToArray();
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cryptoStream.Close();
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}
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memoryStream.Close();
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}
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return Convert.ToBase64String(cipherTextBytes);
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}
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public string Decrypt(string encryptedText) //decrypts encrypted text
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{
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byte[] cipherTextBytes = Convert.FromBase64String(encryptedText);
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byte[] keyBytes = new Rfc2898DeriveBytes(PasswordHash, Encoding.ASCII.GetBytes(SaltKey)).GetBytes(256 / 8);
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var symmetricKey = new RijndaelManaged() { Mode = CipherMode.CBC, Padding = PaddingMode.None };
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var decryptor = symmetricKey.CreateDecryptor(keyBytes, Encoding.ASCII.GetBytes(VIKey));
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var memoryStream = new MemoryStream(cipherTextBytes);
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var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
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byte[] plainTextBytes = new byte[cipherTextBytes.Length];
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int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
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memoryStream.Close();
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cryptoStream.Close();
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return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount).TrimEnd("\0".ToCharArray());
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}
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}
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} |