Exemplo n.º 1
0
        private static string RandomSaltTextDecryption(string textToDecrypt, string encryptionPassKey)
        {
            // Hash the password with SHA256
            byte[] passwordBytes = Encoding.UTF8.GetBytes(encryptionPassKey);
            passwordBytes = SHA256.Create().ComputeHash(passwordBytes);

            // Get bytes from base64 encoded bytes
            byte[] textBytes = Convert.FromBase64String(textToDecrypt);

            byte[] bytesDecrypted = new AES256SaltEncryptionLibrary.AESEncryption().Decrypt(textBytes, passwordBytes);

            // Remove salt
            int saltLength = GetSaltLength();

            byte[] resultBytes = new byte[bytesDecrypted.Length - saltLength];

            for (int i = 0; i < resultBytes.Length; i++)
            {
                resultBytes[i] = bytesDecrypted[i + saltLength];
            }

            string result = Encoding.UTF8.GetString(resultBytes);

            return(result);
        }
Exemplo n.º 2
0
        private static string RandomSaltTextEncryption(string textToEncrypt, string encryptionPassKey)
        {
            // Hash the password with SHA256
            byte[] passwordBytes = Encoding.UTF8.GetBytes(encryptionPassKey);
            passwordBytes = SHA256.Create().ComputeHash(passwordBytes);

            // Get the bytes of the string
            byte[] bytesToBeEncrypted = Encoding.UTF8.GetBytes(textToEncrypt);

            // Get salt for random encryption
            byte[] baSalt      = GetRandomBytes();
            byte[] baEncrypted = new byte[baSalt.Length + bytesToBeEncrypted.Length];

            // Combine Salt + Text
            for (int i = 0; i < baSalt.Length; i++)
            {
                baEncrypted[i] = baSalt[i];
            }
            for (int i = 0; i < textToEncrypt.Length; i++)
            {
                baEncrypted[i + baSalt.Length] = bytesToBeEncrypted[i];
            }

            byte[] bytesEncrypted = new AES256SaltEncryptionLibrary.AESEncryption().Encrypt(baEncrypted, passwordBytes);

            string result = Convert.ToBase64String(bytesEncrypted);

            return(result);
        }
Exemplo n.º 3
0
        public static string DecryptText(string textToDecrypt, string encryptionPassKey)
        {
            // Get the bytes of the string
            byte[] bytesToBeDecrypted = Convert.FromBase64String(textToDecrypt);
            byte[] passwordBytes      = Encoding.UTF8.GetBytes(encryptionPassKey);
            passwordBytes = SHA256.Create().ComputeHash(passwordBytes);

            byte[] bytesDecrypted = new AES256SaltEncryptionLibrary.AESEncryption().Decrypt(bytesToBeDecrypted, passwordBytes);

            string result = Encoding.UTF8.GetString(bytesDecrypted);

            return(result);
        }
Exemplo n.º 4
0
        private static string EncryptText(string textToEncrypt, string encryptionPassKey)
        {
            // Get the bytes of the string
            byte[] bytesToBeEncrypted = Encoding.UTF8.GetBytes(textToEncrypt);
            byte[] passwordBytes      = Encoding.UTF8.GetBytes(encryptionPassKey);

            // Get salt for random encryption
            byte[] baSalt      = GetRandomBytes();
            byte[] baEncrypted = new byte[baSalt.Length + textToEncrypt.Length];

            // Hash the password with SHA256
            passwordBytes = SHA256.Create().ComputeHash(passwordBytes);

            byte[] bytesEncrypted = new AES256SaltEncryptionLibrary.AESEncryption().Encrypt(bytesToBeEncrypted, passwordBytes);

            string result = Convert.ToBase64String(bytesEncrypted);

            return(result);
        }