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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web;
/// <summary>
/// Descripción breve de Encriptar
/// </summary>
public class Encriptar
{
private const String SECRET_KEY = "3614Nico3614Nico";//16 char secret key
public string DecryptIOS(string textToDecrypt)
{
return DecryptIOS(textToDecrypt, SECRET_KEY);
}
private string DecryptIOS(string textToDecrypt, string key)
{
RijndaelManaged rijndaelCipher = new RijndaelManaged();
rijndaelCipher.Mode = CipherMode.CBC;
rijndaelCipher.Padding = PaddingMode.PKCS7;
rijndaelCipher.KeySize = 0x80;
rijndaelCipher.BlockSize = 0x80;
byte[] encryptedData = Convert.FromBase64String(textToDecrypt);
// byte[] encryptedData = Convert.FromHexString(textToDecrypt);
byte[] pwdBytes = Encoding.UTF8.GetBytes(key);
byte[] keyBytes = new byte[0x10];
int len = pwdBytes.Length;
if (len > keyBytes.Length)
{
len = keyBytes.Length;
}
Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = keyBytes;
rijndaelCipher.IV = keyBytes;
byte[] plainText = rijndaelCipher.CreateDecryptor().TransformFinalBlock(encryptedData, 0, encryptedData.Length);
return Encoding.UTF8.GetString(plainText);
}
public string EncryptIOS(string textToEncrypt)
{
return EncryptIOS(textToEncrypt, SECRET_KEY);
}
private string EncryptIOS(string textToEncrypt, string key)
{
RijndaelManaged rijndaelCipher = new RijndaelManaged();
rijndaelCipher.Mode = CipherMode.CBC;
rijndaelCipher.Padding = PaddingMode.PKCS7;
rijndaelCipher.KeySize = 0x80;
rijndaelCipher.BlockSize = 0x80;
byte[] pwdBytes = Encoding.UTF8.GetBytes(key);
byte[] keyBytes = new byte[0x10];
int len = pwdBytes.Length;
if (len > keyBytes.Length)
{
len = keyBytes.Length;
}
Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = keyBytes;
rijndaelCipher.IV = keyBytes;
ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
byte[] plainText = Encoding.UTF8.GetBytes(textToEncrypt);
return Convert.ToBase64String(transform.TransformFinalBlock(plainText, 0, plainText.Length));
}
public string Encrypt(string plainText)
{
string passPhrase = "Pas5pr@se"; // can be any string
string saltValue = "s@1tValue"; // can be any string
string hashAlgorithm = "SHA1"; // can be "MD5"
int passwordIterations = 2; // can be any number
string initVector = "@1B2c3D4e5F6g7H8"; // must be 16 bytes
int keySize = 192;
byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);
string s = "[cód_ provincia]";
byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue);
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
PasswordDeriveBytes password = new PasswordDeriveBytes(passPhrase, saltValueBytes, hashAlgorithm, passwordIterations);
byte[] keyBytes = password.GetBytes(keySize / 8);
// Create uninitialized Rijndael encryption object.
RijndaelManaged symmetricKey = new RijndaelManaged();
// It is reasonable to set encryption mode to Cipher Block Chaining
// (CBC). Use default options for other symmetric key parameters.
symmetricKey.Mode = CipherMode.CBC;
// Generate encryptor from the existing key bytes and initialization
// vector. Key size will be defined based on the number of the key
// bytes.
ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes);
// Define memory stream which will be used to hold encrypted data.
MemoryStream memoryStream = null;
memoryStream = new MemoryStream();
// Define cryptographic stream (always use Write mode for encryption).
CryptoStream cryptoStream = null;
cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write);
// Start encrypting.
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
// Finish encrypting.
cryptoStream.FlushFinalBlock();
// Convert our encrypted data from a memory stream into a byte array.
byte[] cipherTextBytes = memoryStream.ToArray();
// Close both streams.
memoryStream.Close();
cryptoStream.Close();
// Convert encrypted data into a base64-encoded string.
string cipherText = Convert.ToBase64String(cipherTextBytes);
// Return encrypted string.
return cipherText;
}
public string DecryptAES(string textToDecrypt, string key)
{
if (textToDecrypt.Equals(""))
{
return "";
}
RijndaelManaged rijndaelCipher = new RijndaelManaged();
rijndaelCipher.Mode = CipherMode.CBC;
rijndaelCipher.Padding = PaddingMode.PKCS7;
rijndaelCipher.KeySize = 0x80;
rijndaelCipher.BlockSize = 0x80;
byte[] encryptedData = Convert.FromBase64String(textToDecrypt);
byte[] pwdBytes = Encoding.UTF8.GetBytes(key);
byte[] keyBytes = new byte[0x10];
int len = pwdBytes.Length;
if (len > keyBytes.Length)
{
len = keyBytes.Length;
}
Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = keyBytes;
rijndaelCipher.IV = keyBytes;
byte[] plainText = rijndaelCipher.CreateDecryptor().TransformFinalBlock(encryptedData, 0, encryptedData.Length);
return Encoding.UTF8.GetString(plainText);
}
public string EncryptAES(string textToEncrypt, string key)
{
RijndaelManaged rijndaelCipher = new RijndaelManaged();
rijndaelCipher.Mode = CipherMode.CBC;
rijndaelCipher.Padding = PaddingMode.PKCS7;
rijndaelCipher.KeySize = 0x80;
rijndaelCipher.BlockSize = 0x80;
byte[] pwdBytes = Encoding.UTF8.GetBytes(key);
byte[] keyBytes = new byte[0x10];
int len = pwdBytes.Length;
if (len > keyBytes.Length)
{
len = keyBytes.Length;
}
Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = keyBytes;
rijndaelCipher.IV = keyBytes;
ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
byte[] plainText = Encoding.UTF8.GetBytes(textToEncrypt);
return Convert.ToBase64String(transform.TransformFinalBlock(plainText, 0, plainText.Length));
}
//java code
// String Decrypt(String text, String key) throws Exception
// {
// Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
//byte[] keyBytes = new byte[16];
// byte[] b = key.getBytes("UTF-8");
// int len = b.length;
//if (len > keyBytes.length) len = keyBytes.length;
//System.arraycopy(b, 0, keyBytes, 0, len);
//SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
// IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
// cipher.init(Cipher.DECRYPT_MODE,keySpec,ivSpec);
//BASE64Decoder decoder = new BASE64Decoder();
// byte[] results = cipher.doFinal(decoder.decodeBuffer(text));
//return new String(results,"UTF-8");
//}
//String Encrypt(String text, String key)
//throws Exception
//{
// Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
//byte[]
// keyBytes= new byte[16];
//byte[] b = key.getBytes("UTF-8");
//int len = b.length;
//if (len > keyBytes.length) len = keyBytes.length;
//System.arraycopy(b, 0, keyBytes, 0, len);
//SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
//IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);
//cipher.init(Cipher.ENCRYPT_MODE,keySpec,ivSpec);
//byte[] results = cipher.doFinal(text.getBytes("UTF-8"));
//BASE64Encoder encoder = new BASE64Encoder();
//return encoder.encode(results);
//}
public string Decrypt(string cipherText)
{
string tempDecrypt = null;
string passPhrase = "Pas5pr@se"; // can be any string
string saltValue = "s@1tValue"; // can be any string
string hashAlgorithm = "SHA1"; // can be "MD5"
int passwordIterations = 2; // can be any number
string initVector = "@1B2c3D4e5F6g7H8"; // must be 16 bytes
int keySize = 192;
byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);
byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue);
// Convert our ciphertext into a byte array.
byte[] cipherTextBytes = Convert.FromBase64String(cipherText);
PasswordDeriveBytes password = new PasswordDeriveBytes(passPhrase, saltValueBytes, hashAlgorithm, passwordIterations);
// Use the password to generate pseudo-random bytes for the encryption
// key. Specify the size of the key in bytes (instead of bits).
byte[] keyBytes = password.GetBytes(keySize / 8);
// Create uninitialized Rijndael encryption object.
RijndaelManaged symmetricKey = new RijndaelManaged();
// It is reasonable to set encryption mode to Cipher Block Chaining
// (CBC). Use default options for other symmetric key parameters.
symmetricKey.Mode = CipherMode.CBC;
// Generate decryptor from the existing key bytes and initialization
// vector. Key size will be defined based on the number of the key
// bytes.
ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes);
// Define memory stream which will be used to hold encrypted data.
MemoryStream memoryStream = null;
memoryStream = new MemoryStream(cipherTextBytes);
// Define memory stream which will be used to hold encrypted data.
CryptoStream cryptoStream = null;
cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read);
// Since at this point we don't know what the size of decrypted data
// will be, allocate the buffer long enough to hold ciphertext;
// plaintext is never longer than ciphertext.
byte[] plainTextBytes = null;
plainTextBytes = new byte[cipherTextBytes.Length + 1];
try
{
// Start decrypting.
int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
// Close both streams.
memoryStream.Close();
cryptoStream.Close();
// Convert decrypted data into a string.
// Let us assume that the original plaintext string was UTF8-encoded.
string plainText = Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
// Return decrypted string.
tempDecrypt = plainText;
}
catch (Exception ex)
{
}
return tempDecrypt;
}
public string encriptar(string texto)
{
char[] letras;
letras = texto.ToCharArray();
for (int i = 0; i < letras.Length; i++)
{
letras[i] = (char)(letras[i] + (char)5);
}
string encriptado = new string(letras);
return encriptado;
}
/**
* FUNCION DESENCRIPTAR TEXTO
* @param texto
* @return
*/
public virtual string desencriptar(string texto)
{
char[] letras;
letras = texto.ToCharArray();
for (int i = 0; i < letras.Length; i++)
{
letras[i] = (char)(letras[i] - (char)5);
}
string desencriptado = new string(letras);
return desencriptado;
}
}