private static byte[] Decrypt(byte[] cipherKey, byte[] ciphertext)
{
var cipher = new System.Security.Cryptography.AesManaged();
cipher.Key = cipherKey;
cipher.Mode = System.Security.Cryptography.CipherMode.CBC;
cipher.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
var ivSize = cipher.IV.Length;
var iv = new byte[ivSize];
Array.Copy(ciphertext, iv, ivSize);
cipher.IV = iv;
var data = new byte[ciphertext.Length - ivSize];
Array.Copy(ciphertext, ivSize, data, 0, data.Length);
using (var ms = new System.IO.MemoryStream())
{
using (var cs = new System.Security.Cryptography.CryptoStream(
ms, cipher.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(data, 0, data.Length);
}
var plaintext = ms.ToArray();
return plaintext;
}
}
/// <summary>
/// Saves the dataset encrypted in specified file
/// </summary>
/// <param name="dataset">Dataset to save</param>
/// <param name="username">Username for encryption</param>
/// <param name="password">Password for encryption</param>
/// <param name="fileName">File name where to save</param>
/// <param name="compress">Should the file be compressed</param>
internal static void EncryptDataSet(System.Data.DataSet dataset, string username, string password, string fileName, bool compress)
{
// Check the parameters
if (dataset == null ||
string.IsNullOrEmpty(username) ||
string.IsNullOrEmpty(password) ||
string.IsNullOrEmpty(fileName))
{
throw new System.ArgumentNullException("All arguments must be supplied.");
}
// Save the dataset as encrypted
using (System.Security.Cryptography.Aes aes = Cryptography.InitAes(username, password)) {
using (System.IO.FileStream fileStream = new System.IO.FileStream(fileName, System.IO.FileMode.Create, System.IO.FileAccess.ReadWrite, System.IO.FileShare.None)) {
using (System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(fileStream, aes.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write)) {
if (compress)
{
// when compression is requested, use GZip
using (System.IO.Compression.GZipStream zipStream = new System.IO.Compression.GZipStream(cryptoStream, System.IO.Compression.CompressionMode.Compress)) {
dataset.WriteXml(zipStream, System.Data.XmlWriteMode.WriteSchema);
zipStream.Flush();
}
}
else
{
dataset.WriteXml(cryptoStream, System.Data.XmlWriteMode.WriteSchema);
cryptoStream.FlushFinalBlock();
}
}
}
}
}
/// <summary>
/// 加密文件
/// </summary>
public void EncryptFile(string Value, string OuputFileName)
{
try
{
// Must be 64 bits, 8 bytes.
// Distribute this key to the user who will decrypt this file.
//Get the Key for the file to Encrypt.
string sKey = GenerateKey();
byte[] b = ASCIIEncoding.ASCII.GetBytes(Value);
System.IO.FileStream fsEncrypted = new System.IO.FileStream(OuputFileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);
System.Security.Cryptography.DESCryptoServiceProvider DES = new System.Security.Cryptography.DESCryptoServiceProvider();
DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
System.Security.Cryptography.ICryptoTransform desencrypt = DES.CreateEncryptor();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(fsEncrypted, desencrypt, System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(b, 0, b.Length);
cs.Close();
fsEncrypted.Close();
}
catch (Exception ex)
{
throw ex;
}
}
private static string Decrypt(string cipherText, string passPhrase)
{
byte[] initVectorBytes = System.Text.Encoding.ASCII.GetBytes("tu89geji340t89u2");
const int keysize = 256;
byte[] cipherTextBytes = Convert.FromBase64String(cipherText);
using (System.Security.Cryptography.PasswordDeriveBytes password = new System.Security.Cryptography.PasswordDeriveBytes(passPhrase, null))
{
byte[] keyBytes = password.GetBytes(keysize / 8);
using (System.Security.Cryptography.RijndaelManaged symmetricKey = new System.Security.Cryptography.RijndaelManaged())
{
symmetricKey.Mode = System.Security.Cryptography.CipherMode.CBC;
using (System.Security.Cryptography.ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes))
{
using (MemoryStream memoryStream = new MemoryStream(cipherTextBytes))
{
using (System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
byte[] plainTextBytes = new byte[cipherTextBytes.Length];
int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
return(System.Text.Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount));
}
}
}
}
}
}
//static Logger logger = SimpleLogger.setLogger("Common");
#region �����W
/// <summary>
/// ��������������
/// </summary>
/// <param name="str">�Í������镶����</param>
/// <param name="key">�p�X���[�h</param>
/// <returns>�Í������ꂽ������</returns>
public static string EncryptString(string str, string key)
{
//�������o�C�g�^�z��ɂ���
byte[] bytesIn = System.Text.Encoding.UTF8.GetBytes(str);
//DESCryptoServiceProvider�I�u�W�F�N�g�̍쐬
System.Security.Cryptography.DESCryptoServiceProvider des = new System.Security.Cryptography.DESCryptoServiceProvider();
//���L�L�[�Ə������x�N�^�����
//�p�X���[�h��o�C�g�z��ɂ���
byte[] bytesKey = System.Text.Encoding.UTF8.GetBytes(key);
//���L�L�[�Ə������x�N�^��ݒ�
des.Key = ResizeBytesArray(bytesKey, des.Key.Length);
des.IV = ResizeBytesArray(bytesKey, des.IV.Length);
//�Í������ꂽ�f�[�^������o�����߂�MemoryStream
MemoryStream msOut = new System.IO.MemoryStream();
//DES�Í����I�u�W�F�N�g�̍쐬
System.Security.Cryptography.ICryptoTransform desdecrypt = des.CreateEncryptor();
//�������ނ��߂�CryptoStream�̍쐬
System.Security.Cryptography.CryptoStream cryptStreem = new System.Security.Cryptography.CryptoStream(msOut, desdecrypt, System.Security.Cryptography.CryptoStreamMode.Write);
//��������
cryptStreem.Write(bytesIn, 0, bytesIn.Length);
cryptStreem.FlushFinalBlock();
//�Í������ꂽ�f�[�^��擾
byte[] bytesOut = msOut.ToArray();
//����
cryptStreem.Close();
msOut.Close();
//Base64�ŕ�����ɕύX���Č��ʂ�Ԃ�
return System.Convert.ToBase64String(bytesOut).Replace("=", "");
}
///
/// DES解密
///
/// 要解密字符串
/// 返回解密后字符串
public static String Decrypt_DES(String str)
{
if (str.Trim() == "")
{
return("");
}
try
{
System.Security.Cryptography.DESCryptoServiceProvider des = new System.Security.Cryptography.DESCryptoServiceProvider();
Int32 x;
Byte[] inputByteArray = new Byte[str.Length / 2];
for (x = 0; x < str.Length / 2; x++)
{
inputByteArray[x] = (Byte)(Convert.ToInt32(str.Substring(x * 2, 2), 16));
}
des.Key = System.Text.ASCIIEncoding.ASCII.GetBytes(strDesKey);
des.IV = System.Text.ASCIIEncoding.ASCII.GetBytes(strDesKey);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, des.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.StringBuilder ret = new System.Text.StringBuilder();
return(System.Text.Encoding.Default.GetString(ms.ToArray()));
}
catch (System.Exception ex)
{
return("");
}
}
public static string Encrypt(string plainText, string passPhrase)
{
byte[] initVectorBytes = Encoding.ASCII.GetBytes("tu89geji340t89u2");
const int keysize = 256;
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
using (System.Security.Cryptography.PasswordDeriveBytes password = new System.Security.Cryptography.PasswordDeriveBytes(passPhrase, null))
{
byte[] keyBytes = password.GetBytes(keysize / 8);
using (System.Security.Cryptography.RijndaelManaged symmetricKey = new System.Security.Cryptography.RijndaelManaged())
{
symmetricKey.Mode = System.Security.Cryptography.CipherMode.CBC;
using (System.Security.Cryptography.ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes))
{
using (MemoryStream memoryStream = new MemoryStream())
{
using (System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(memoryStream, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
byte[] cipherTextBytes = memoryStream.ToArray();
return(Convert.ToBase64String(cipherTextBytes));
}
}
}
}
}
}
/// <summary>
/// 暗号化された文字列を復号化する
/// </summary>
public static string DecryptString(string str, string password)
{
var aes = new System.Security.Cryptography.AesCryptoServiceProvider();
var passwordBytes = System.Text.Encoding.UTF8.GetBytes(password);
aes.Key = ResizeBytesArray(passwordBytes, aes.Key.Length);
aes.IV = ResizeBytesArray(passwordBytes, aes.IV.Length);
var data = System.Convert.FromBase64String(str);
var stream = new System.IO.MemoryStream(data);
var decryptor = aes.CreateDecryptor();
var cryptStreem = new System.Security.Cryptography.CryptoStream(
stream,
decryptor,
System.Security.Cryptography.CryptoStreamMode.Read
);
var reader = new System.IO.StreamReader(
cryptStreem,
System.Text.Encoding.UTF8
);
try {
var result = reader.ReadToEnd();
return(result);
} finally {
reader.Close();
cryptStreem.Close();
stream.Close();
}
}
public static byte[] GetEmbeddedBytes(String file)
{
using (var stream = Assembly.GetExecutingAssembly().GetManifestResourceStream(file))
{
if (stream != null)
{
var assemblyData = new Byte[stream.Length];
stream.Read(assemblyData, 0, assemblyData.Length);
var key = System.Text.Encoding.ASCII.GetBytes("t7n6cVWf9Tbns0eI");
var iv = System.Text.Encoding.ASCII.GetBytes("9qh17ZUf");
var provider = new System.Security.Cryptography.TripleDESCryptoServiceProvider();
var transform = provider.CreateDecryptor(key, iv);
byte[] bytes;
using (var cstream = new MemoryStream())
{
using (var cryptoStream = new System.Security.Cryptography.CryptoStream(cstream, transform, System.Security.Cryptography.CryptoStreamMode.Write))
{
cryptoStream.Write(assemblyData, 0, assemblyData.Length);
cryptoStream.FlushFinalBlock();
bytes = cstream.ToArray();
using (var compressedStream = new MemoryStream(bytes))
using (var zipStream = new GZipStream(compressedStream, CompressionMode.Decompress))
using (var resultStream = new MemoryStream())
{
zipStream.CopyTo(resultStream);
return(resultStream.ToArray());
}
}
}
}
}
return(null);
}
public static byte[] EncryptData(byte[] publickey, byte[] data)
{
using (System.Security.Cryptography.Aes myAes = System.Security.Cryptography.Aes.Create())
{
System.Security.Cryptography.ICryptoTransform encryptor = myAes.CreateEncryptor(myAes.Key, myAes.IV);
using (System.IO.MemoryStream msEncrypt = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
System.IO.MemoryStream headerms = new System.IO.MemoryStream();
System.IO.BinaryWriter headerbw = new System.IO.BinaryWriter(headerms);
using (System.IO.BinaryWriter bw = new System.IO.BinaryWriter(csEncrypt))
{
System.Security.Cryptography.RSACryptoServiceProvider public_key = new System.Security.Cryptography.RSACryptoServiceProvider(1024);
public_key.ImportCspBlob(publickey);
byte[] encryptedkey = public_key.Encrypt(Combine(myAes.Key, myAes.IV), false);
headerbw.Write(encryptedkey.Length);
headerbw.Write(myAes.Key.Length);
headerbw.Write(myAes.IV.Length);
headerbw.Write(encryptedkey);
headerbw.Flush();
bw.Write(data);
}
byte[] result = Combine(headerms.ToArray(), msEncrypt.ToArray());
headerbw.Close();
return(result);
}
}
}
}
// ========================================
// static field
// ========================================
public static string EncryptString(string str, string password)
{
var aes = new System.Security.Cryptography.AesCryptoServiceProvider();
var data = System.Text.Encoding.UTF8.GetBytes(str);
var passwordBytes = System.Text.Encoding.UTF8.GetBytes(password);
aes.Key = ResizeBytesArray(passwordBytes, aes.Key.Length);
aes.IV = ResizeBytesArray(passwordBytes, aes.IV.Length);
var stream = new System.IO.MemoryStream();
var encryptor = aes.CreateEncryptor();
var cryptStream = new System.Security.Cryptography.CryptoStream(
stream,
encryptor,
System.Security.Cryptography.CryptoStreamMode.Write
);
try {
cryptStream.Write(data, 0, data.Length);
cryptStream.FlushFinalBlock();
var encrypted = stream.ToArray();
return(System.Convert.ToBase64String(encrypted));
} finally {
cryptStream.Close();
stream.Close();
}
}
/// <summary>
/// رمزگشایی داده ها
/// </summary>
/// <param name="data">داده ها</param>
/// <param name="Key">Key</param>
/// <param name="IV">IV</param>
public byte[] Decrypt(byte[] data, byte[] Key, byte[] IV)
{
System.IO.MemoryStream _MemoryStream = new System.IO.MemoryStream(data);
System.Security.Cryptography.CryptoStream _CryptoStream;
if (Key == null && IV == null)
{
_CryptoStream = new System.Security.Cryptography.CryptoStream(_MemoryStream, DES.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Read);
}
else
{
_CryptoStream = new System.Security.Cryptography.CryptoStream(_MemoryStream, DES.CreateDecryptor(Key, IV), System.Security.Cryptography.CryptoStreamMode.Read);
}
List <byte> DecryptedDataList = new List <byte>();
byte[] TempData = new byte[2048];
int readCount = 0;
do
{
readCount = _CryptoStream.Read(TempData, 0, 2048);
for (int i = 0; i < readCount; i++)
{
DecryptedDataList.Add(TempData[i]);
}
}while (readCount > 0);
_CryptoStream.Close();
_MemoryStream.Close();
_CryptoStream.Dispose();
_MemoryStream.Dispose();
return(DecryptedDataList.ToArray());
}
public static string DesDecrypt(string inputString, string decryptKey)
{
#region
byte[] byKey = null;
byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
byte[] inputByteArray = new Byte[inputString.Length];
try
{
byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
System.Security.Cryptography.DESCryptoServiceProvider des = new System.Security.Cryptography.DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(inputString);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, des.CreateDecryptor(byKey, IV), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = new System.Text.UTF8Encoding();
inputString = encoding.GetString(ms.ToArray());
}
catch
{
throw;
}
return(inputString);
#endregion
}
public static string DecryptPAN(string encryptedPAN)
{
// Log log = new Log(LogPath);
System.Security.Cryptography.SymmetricAlgorithm alg = System.Security.Cryptography.TripleDES.Create();
alg.KeySize = 128;
alg.Key = Hex2Bin(PEncKey);
alg.IV = Hex2Bin(PEncIV);
alg.Padding = System.Security.Cryptography.PaddingMode.None;
alg.Mode = System.Security.Cryptography.CipherMode.CBC;
byte[] buf = new byte[16];
Hex2Bin(encryptedPAN, buf);
try
{
MemoryStream outs = new MemoryStream();
System.Security.Cryptography.CryptoStream encStream = new System.Security.Cryptography.CryptoStream(outs, alg.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
encStream.Write(buf, 0, 16);
encStream.FlushFinalBlock();
Buffer.BlockCopy(outs.GetBuffer(), 0, buf, 0, 16);
encStream.Close();
return(Bin2Hex(buf).Trim('A'));
}
catch { }
return(null);
}
public static byte[] DES_Enc(string str, string key, string vit)
{
//判断向量是否为空,进行默认赋值;
if (string.IsNullOrEmpty(key)) { key = "KCCT"; }
//判断向量是否为空,进行默认赋值;
if (string.IsNullOrEmpty(vit)) { vit = "MNSN"; }
try
{
//实例化加解密类的对象;
using (var descsp = new System.Security.Cryptography.DESCryptoServiceProvider())
{
//定义字节数组,用来存储要加密的字符串;
var data = System.Text.Encoding.UTF8.GetBytes(str);
//实例化内存流对象;
using (var mStream = new System.IO.MemoryStream())
{
//使用内存流实例化加密流对象;
using (var cStream = new System.Security.Cryptography.CryptoStream(mStream, descsp.CreateEncryptor(System.Text.Encoding.Unicode.GetBytes(key), System.Text.Encoding.Unicode.GetBytes(vit)), System.Security.Cryptography.CryptoStreamMode.Write))
{
//向加密流中写入数据;
cStream.Write(data, 0, data.Length);
//释放加密流;
cStream.FlushFinalBlock();
//返回加密后的字符串;
return mStream.ToArray();
}
}
}
}
catch { return null; }
}
public void init()
{
// signature=java.security.Signature.getInstance("SHA1withRSA");
// keyFactory=KeyFactory.getInstance("RSA");
sha1 = new System.Security.Cryptography.SHA1CryptoServiceProvider();
cs = new System.Security.Cryptography.CryptoStream(System.IO.Stream.Null, sha1, System.Security.Cryptography.CryptoStreamMode.Write);
}
public static string Encrypt(string[] keyArray)
{
string key = "";
foreach (string s in keyArray)
{
key = key + s + ";";
}
byte[] InitialVectorBytes = Encoding.ASCII.GetBytes(InitialVector);
byte[] SaltValueBytes = Encoding.ASCII.GetBytes(Salt);
byte[] PlainTextBytes = Encoding.UTF8.GetBytes(key);
System.Security.Cryptography.PasswordDeriveBytes DerivedPassword = new System.Security.Cryptography.PasswordDeriveBytes(Password, SaltValueBytes, HashAlgorithm, PasswordIterations);
byte[] KeyBytes = DerivedPassword.GetBytes(KeySize / 8);
System.Security.Cryptography.RijndaelManaged SymmetricKey = new System.Security.Cryptography.RijndaelManaged();
SymmetricKey.Mode = System.Security.Cryptography.CipherMode.CBC;
byte[] CipherTextBytes = null;
using (System.Security.Cryptography.ICryptoTransform Encryptor = SymmetricKey.CreateEncryptor(KeyBytes, InitialVectorBytes))
{
using (System.IO.MemoryStream MemStream = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream CryptoStream = new System.Security.Cryptography.CryptoStream(MemStream, Encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
CryptoStream.Write(PlainTextBytes, 0, PlainTextBytes.Length);
CryptoStream.FlushFinalBlock();
CipherTextBytes = MemStream.ToArray();
MemStream.Close();
CryptoStream.Close();
}
}
}
SymmetricKey.Clear();
return(Convert.ToBase64String(CipherTextBytes));
}
/// <summary>
/// Criptografa um array de bytes em outro array de bytes.
/// </summary>
/// <returns>Array de bytes criptografado.</returns>
/// <param name="p_plaintextbytes">Array de bytes.</param>
public byte[] EncryptToBytes(byte[] p_plaintextbytes)
{
byte[] v_ciphertextbytes;
byte[] v_plaintextbyteswithsalt;
System.IO.MemoryStream v_memory;
System.Security.Cryptography.CryptoStream v_crypto;
this.Initialize();
v_plaintextbyteswithsalt = this.AddSalt(p_plaintextbytes);
v_memory = new System.IO.MemoryStream();
lock (this)
{
v_crypto = new System.Security.Cryptography.CryptoStream(v_memory, this.v_encryptor, System.Security.Cryptography.CryptoStreamMode.Write);
v_crypto.Write(v_plaintextbyteswithsalt, 0, v_plaintextbyteswithsalt.Length);
v_crypto.FlushFinalBlock();
v_ciphertextbytes = v_memory.ToArray();
v_memory.Close();
v_crypto.Close();
return(v_ciphertextbytes);
}
}
public static string aesDecryptBase64(string SourceStr, ulong Key)
{
string decrypt = "";
try
{
var aes = new System.Security.Cryptography.AesCryptoServiceProvider();
var md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
var sha256 = new System.Security.Cryptography.SHA256CryptoServiceProvider();
byte[] key = sha256.ComputeHash(BitConverter.GetBytes(Key));
byte[] iv = md5.ComputeHash(BitConverter.GetBytes(Key));
aes.Key = key;
aes.IV = iv;
byte[] dataByteArray = Convert.FromBase64String(SourceStr);
using (var ms = new System.IO.MemoryStream())
{
using (var cs = new System.Security.Cryptography.CryptoStream(ms, aes.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(dataByteArray, 0, dataByteArray.Length);
cs.FlushFinalBlock();
decrypt = Encoding.UTF8.GetString(ms.ToArray());
}
}
}
catch (Exception e)
{
}
return(decrypt);
}
/// <summary>
/// 微信小程序 encryptedData 解密
/// </summary>
/// <param name="encryptedDataStr"></param>
/// <param name="key">session_key</param>
/// <param name="iv">iv</param>
/// <returns></returns>
public string AES_Decrypt(string encryptedDataStr, string key, string iv)
{
var rijalg = System.Security.Cryptography.Aes.Create();
rijalg.KeySize = 128;
rijalg.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
rijalg.Mode = System.Security.Cryptography.CipherMode.CBC;
rijalg.Key = System.Convert.FromBase64String(key);
rijalg.IV = System.Convert.FromBase64String(iv);
var decryptor = rijalg.CreateDecryptor(rijalg.Key, rijalg.IV);
var encryptedData = System.Convert.FromBase64String(encryptedDataStr);
using (var msDecrypt = new System.IO.MemoryStream(encryptedData))
{
using (var csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
using (var srDecrypt = new System.IO.StreamReader(csDecrypt))
{
return(srDecrypt.ReadToEnd());
}
}
}
}
public static string decryptRJ256(string target, string key, string iv)
{
var rijndael = new System.Security.Cryptography.RijndaelManaged()
{
Padding = System.Security.Cryptography.PaddingMode.Zeros,
Mode = System.Security.Cryptography.CipherMode.CBC,
KeySize = 256,
BlockSize = 256
};
var keyBytes = Encoding.ASCII.GetBytes(key);
var ivBytes = Encoding.ASCII.GetBytes(iv);
var decryptor = rijndael.CreateDecryptor(keyBytes, ivBytes);
var toDecrypt = Convert.FromBase64String(target);
var fromEncrypt = new byte[toDecrypt.Length];
var msDecrypt = new System.IO.MemoryStream(toDecrypt);
var csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Read);
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
string data = Encoding.ASCII.GetString(fromEncrypt);
data = data.Replace("\0", "");
return data;
}
static public byte[] Decode(byte[] Data, System.Security.Cryptography.ICryptoTransform Decoder)
{
byte[] Outer = new byte[] { }; int rdlen = 0;
if (Data.Length > 0)
{
using (System.IO.MemoryStream memStream = new System.IO.MemoryStream())
{
byte[] bin = new byte[128]; int len;
System.IO.MemoryStream InputStr = new System.IO.MemoryStream();
InputStr.Write(Data, 0, Data.Length);
InputStr.Position = 0;
System.Security.Cryptography.CryptoStream CryptStream = new System.Security.Cryptography.CryptoStream(memStream, Decoder, System.Security.Cryptography.CryptoStreamMode.Write);
while (rdlen < Data.Length)
{
len = InputStr.Read(bin, 0, 128);
CryptStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
CryptStream.FlushFinalBlock();
Outer = memStream.ToArray();
CryptStream.Close();
}
}
return(Outer);
}
public static string encryptRJ256(string target, string key, string iv)
{
var rijndael = new System.Security.Cryptography.RijndaelManaged()
{
Padding = System.Security.Cryptography.PaddingMode.Zeros,
Mode = System.Security.Cryptography.CipherMode.CBC,
KeySize = 256,
BlockSize = 256
};
var bytesKey = Encoding.ASCII.GetBytes(key);
var bytesIv = Encoding.ASCII.GetBytes(iv);
var encryptor = rijndael.CreateEncryptor(bytesKey, bytesIv);
var msEncrypt = new System.IO.MemoryStream();
var csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor, System.Security.Cryptography.CryptoStreamMode.Write);
var toEncrypt = Encoding.ASCII.GetBytes(target);
csEncrypt.Write(toEncrypt, 0, toEncrypt.Length);
csEncrypt.FlushFinalBlock();
var encrypted = msEncrypt.ToArray();
return Convert.ToBase64String(encrypted);
}
private static string Encrypt(string hashKey, string strQueryStringParameter)
{
System.Security.Cryptography.MD5CryptoServiceProvider hash_func = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] key = hash_func.ComputeHash(Encoding.ASCII.GetBytes(hashKey));
byte[] IV = new byte[hashKey.Length];
System.Security.Cryptography.SHA1CryptoServiceProvider sha_func = new System.Security.Cryptography.SHA1CryptoServiceProvider();
byte[] temp = sha_func.ComputeHash(Encoding.ASCII.GetBytes(hashKey));
for (int i = 0; i < hashKey.Length; i++)
{
IV[i] = temp[hashKey.Length];
}
byte[] toenc = System.Text.Encoding.UTF8.GetBytes(strQueryStringParameter);
System.Security.Cryptography.TripleDESCryptoServiceProvider des =
new System.Security.Cryptography.TripleDESCryptoServiceProvider();
des.KeySize = 128;
MemoryStream ms = new MemoryStream();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(
ms,
des.CreateEncryptor(key, IV),
System.Security.Cryptography.CryptoStreamMode.Write
);
cs.Write(toenc, 0, toenc.Length);
cs.FlushFinalBlock();
return(Convert.ToBase64String(ms.ToArray()));
}
public static void KriptoFile(string dosyalar, string password = "******", string uzanti = ".uzanti")
{
System.Security.Cryptography.Rfc2898DeriveBytes rfc = new System.Security.Cryptography.Rfc2898DeriveBytes(password, @byte);
System.IO.FileStream fs = new System.IO.FileStream(dosyalar + uzanti, System.IO.FileMode.Create);
System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(fs, rm.CreateEncryptor(rfc.GetBytes(32), rfc.GetBytes(16)), System.Security.Cryptography.CryptoStreamMode.Write);
System.IO.FileStream fs2 = new System.IO.FileStream(dosyalar, System.IO.FileMode.Open, System.IO.FileAccess.Read);
int temp;
temp = fs2.ReadByte();
while (temp != -1)
{
cs.WriteByte((byte)temp);
temp = fs2.ReadByte();
}
//Close işlemleri , silmeyin. Mümkünse hiç bi' yeri ellemeyin.
cs.Close();
fs.Close();
fs2.Close();
System.IO.File.Delete(dosyalar); //Bu biraz farklı , ilk önce dosyaların kopyasını oluşturup şifreler. Daha sonra siler.
}
public void init()
{
// signature=java.security.Signature.getInstance("SHA1withRSA");
// keyFactory=KeyFactory.getInstance("RSA");
sha1 = new System.Security.Cryptography.SHA1CryptoServiceProvider();
cs = new System.Security.Cryptography.CryptoStream(System.IO.Stream.Null, sha1, System.Security.Cryptography.CryptoStreamMode.Write);
}
public static string Encrypt(string plainText, string encryptionKey)
{
//string EncryptionKey = "tahaahat";
if (plainText == null)
{
return(string.Empty);
}
byte[] clearBytes = System.Text.Encoding.Unicode.GetBytes(plainText);
using (System.Security.Cryptography.Aes encryptor = System.Security.Cryptography.Aes.Create())
{
System.Security.Cryptography.Rfc2898DeriveBytes pdb = new System.Security.Cryptography.Rfc2898DeriveBytes(encryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, encryptor.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
plainText = HttpServerUtility.UrlTokenEncode(ms.ToArray());
}
}
return(plainText);
}
public string EncryptPassword(string clearText)
{
string encryptedText = "";
string EncryptionKey = "Xavier";
byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
using (System.Security.Cryptography.Aes encryptor = System.Security.Cryptography.Aes.Create())
{
System.Security.Cryptography.Rfc2898DeriveBytes pdb = new System.Security.Cryptography.Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, encryptor.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
encryptedText = Convert.ToBase64String(ms.ToArray());
}
}
return(encryptedText);
}
public static byte[] DecryptData(System.Security.Cryptography.RSACryptoServiceProvider full_rsa, byte[] data)
{
System.IO.BinaryReader br = new System.IO.BinaryReader(new System.IO.MemoryStream(data));
int encryptedkeylength = br.ReadInt32();
int aeskeylength = br.ReadInt32();
int aesivlength = br.ReadInt32();
byte[] encryptedaeskey = br.ReadBytes(encryptedkeylength);
byte[] encrypteddata = br.ReadBytes((int)(data.Length - br.BaseStream.Position));
br.Close();
byte[] decryptedkey = full_rsa.Decrypt(encryptedaeskey, false);
br = new System.IO.BinaryReader(new System.IO.MemoryStream(decryptedkey));
using (System.Security.Cryptography.Aes myAes = System.Security.Cryptography.Aes.Create())
{
byte[] aeskey = br.ReadBytes(aeskeylength);
byte[] aesiv = br.ReadBytes(aesivlength);
System.Security.Cryptography.ICryptoTransform decryptor = myAes.CreateDecryptor(aeskey, aesiv);
using (System.IO.MemoryStream msDecrypt = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
using (System.IO.BinaryWriter bw = new System.IO.BinaryWriter(csEncrypt))
{
bw.Write(encrypteddata);
}
return(msDecrypt.ToArray());
}
}
}
}
public static string Decrypt(string CipherText, string Password,
string Salt = "Kosher", string HashAlgorithm = "SHA1",
int PasswordIterations = 2, string InitialVector = "OFRna73m*aze01xY",
int KeySize = 256)
{
if (string.IsNullOrEmpty(CipherText))
{
return("");
}
byte[] InitialVectorBytes = Encoding.ASCII.GetBytes(InitialVector);
byte[] SaltValueBytes = Encoding.ASCII.GetBytes(Salt);
byte[] CipherTextBytes = Convert.FromBase64String(CipherText);
System.Security.Cryptography.PasswordDeriveBytes DerivedPassword = new System.Security.Cryptography.PasswordDeriveBytes(Password, SaltValueBytes, HashAlgorithm, PasswordIterations);
byte[] KeyBytes = DerivedPassword.GetBytes(KeySize / 8);
System.Security.Cryptography.RijndaelManaged SymmetricKey = new System.Security.Cryptography.RijndaelManaged();
SymmetricKey.Mode = System.Security.Cryptography.CipherMode.CBC;
byte[] PlainTextBytes = new byte[CipherTextBytes.Length];
int ByteCount = 0;
using (System.Security.Cryptography.ICryptoTransform Decryptor = SymmetricKey.CreateDecryptor(KeyBytes, InitialVectorBytes))
{
using (System.IO.MemoryStream MemStream = new System.IO.MemoryStream(CipherTextBytes))
{
using (System.Security.Cryptography.CryptoStream CryptoStream = new System.Security.Cryptography.CryptoStream(MemStream, Decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
ByteCount = CryptoStream.Read(PlainTextBytes, 0, PlainTextBytes.Length);
MemStream.Close();
CryptoStream.Close();
}
}
}
SymmetricKey.Clear();
return(Encoding.UTF8.GetString(PlainTextBytes, 0, ByteCount));
}
public string Descifrar(string Cadena)
{
try
{
if (string.IsNullOrEmpty(Cadena))
{
return(Cadena);
}
byte[] PlainText;
PlainText = Convert.FromBase64String(Cadena);
MemoryStream memdata = new MemoryStream();
System.Security.Cryptography.DESCryptoServiceProvider DES = new System.Security.Cryptography.DESCryptoServiceProvider();
System.Security.Cryptography.CryptoStream cryptostream = new System.Security.Cryptography.CryptoStream(memdata,
DES.CreateDecryptor(Encoding.ASCII.GetBytes(Default8Key), Encoding.ASCII.GetBytes(Default8VI)),
System.Security.Cryptography.CryptoStreamMode.Write);
cryptostream.Write(PlainText, 0, PlainText.Length);
cryptostream.FlushFinalBlock();
cryptostream.Close();
return(Encoding.ASCII.GetString(memdata.ToArray()));
}
catch (Exception ex)
{
return(null);
}
}
/// <summary>
/// Reads and decrypts the dataset from the given file
/// </summary>
/// <param name="dataset">Dataset to read</param>
/// <param name="username">Username for decryption</param>
/// <param name="password">Password for decryption</param>
/// <param name="fileName">File name to read</param>
/// <param name="compressed">Is the file compressed</param>
/// <returns>XmlReadMode used for reading</returns>
internal static System.Data.XmlReadMode DecryptDataSet(System.Data.DataSet dataset, string username, string password, string fileName, bool compressed)
{
System.Data.XmlReadMode xmlReadMode;
// Check the parameters
if (dataset == null ||
string.IsNullOrEmpty(username) ||
string.IsNullOrEmpty(password) ||
string.IsNullOrEmpty(fileName))
{
throw new System.ArgumentNullException("All arguments must be supplied.");
}
// Read the dataset and encrypt it
using (System.Security.Cryptography.Aes aes = Cryptography.InitAes(username, password)) {
using (System.IO.FileStream fileStream = new System.IO.FileStream(fileName, System.IO.FileMode.Open)) {
using (System.Security.Cryptography.CryptoStream cryptoStream = new System.Security.Cryptography.CryptoStream(fileStream, aes.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Read)) {
if (compressed)
{
// when decompression is requested, use GZip
using (System.IO.Compression.GZipStream zipStream = new System.IO.Compression.GZipStream(cryptoStream, System.IO.Compression.CompressionMode.Decompress)) {
xmlReadMode = dataset.ReadXml(zipStream, System.Data.XmlReadMode.ReadSchema);
}
}
else
{
xmlReadMode = dataset.ReadXml(cryptoStream, System.Data.XmlReadMode.ReadSchema);
}
}
}
}
return(xmlReadMode);
}
private string Decrypt(string cipher, string type)
{
string EncryptionKey;
byte[] cipherBytes;
EncryptionKey = string.Format(this.Core.GetAttribute("DecryptKey"), type);
cipherBytes = Convert.FromBase64String(cipher);
using (System.Security.Cryptography.Rijndael encryptor = System.Security.Cryptography.Rijndael.Create())
{
System.Security.Cryptography.Rfc2898DeriveBytes pdb = new System.Security.Cryptography.Rfc2898DeriveBytes(EncryptionKey, Convert.FromBase64String(this.Core.GetAttribute("DecryptSalt")));
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, encryptor.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipher = System.Text.Encoding.Unicode.GetString(ms.ToArray());
}
}
return(cipher);
}
public string EncryptString(string value, string keyString)
{
try
{
byte[] resultBA = new byte[value.Length], valueBA = new byte[value.Length];
byte[] iv = new byte[] { 0x14, 0xD7, 0x5B, 0xA2, 0x47, 0x83, 0x0F, 0xC4 };
System.Text.ASCIIEncoding ascEncoding = new System.Text.ASCIIEncoding();
byte[] key = new byte[24];
ascEncoding.GetBytes(keyString, 0, keyString.Length < 24?keyString.Length:24, key, 0);
MemoryStream memStream = new MemoryStream();
byte[] tempBA = new byte[value.Length];
ascEncoding.GetBytes(value, 0, value.Length, tempBA, 0);
System.Security.Cryptography.CryptoStream cStream = new System.Security.Cryptography.CryptoStream(memStream, System.Security.Cryptography.TripleDESCryptoServiceProvider.Create().CreateEncryptor(key, iv), System.Security.Cryptography.CryptoStreamMode.Write);
cStream.Write(tempBA, 0, tempBA.Length);
cStream.FlushFinalBlock();
resultBA = memStream.ToArray();
cStream.Close();
return(InternalMethods.BytesToHexString(resultBA));
}
catch (Exception exc)
{
LogEvent(exc.Source, "EncryptString()", exc.ToString(), 4);
return("");
}
}
/// <summary>
/// Encrypts a source stream and returns a Base64 result.
/// </summary>
/// <param name="Source">The source steam.</param>
/// <param name="Key">A key to use for the encryption.</param>
/// <returns>A Base64 string of the encrypted information.</returns>
public string Encrypt(System.IO.Stream Source, string Key)
{
// read the stream into a byte array
Source.Position = 0;
byte[] bytIn = new byte[Source.Length];
Source.Read(bytIn, 0, (int)Source.Length);
// create a MemoryStream so that the process can be done without I/O files
System.IO.MemoryStream ms = new System.IO.MemoryStream();
byte[] bytKey = GetLegalKey(Key);
// set the private key
_cryptoservice.Key = bytKey;
_cryptoservice.IV = bytKey;
// create an Encryptor from the Provider Service instance
System.Security.Cryptography.ICryptoTransform encrypto = _cryptoservice.CreateEncryptor();
// create Crypto Stream that transforms a stream using the encryption
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, encrypto, System.Security.Cryptography.CryptoStreamMode.Write);
// write out encrypted content into MemoryStream
cs.Write(bytIn, 0, bytIn.Length);
cs.FlushFinalBlock();
byte[] bytOut = ms.GetBuffer();
// convert into Base64 so that the result can be used in xml
return(System.Convert.ToBase64String(bytOut, 0, (int)ms.Length));
}
private static readonly String strDesKey = "gaoguanj";//加密所需8位密匙
///
/// DES加密
///
/// 要加密字符串
/// 返回加密后字符串
public static String Encrypt_DES(String str)
{
if (str.Trim() == "")
{
return("");
}
try
{
System.Security.Cryptography.DESCryptoServiceProvider des = new System.Security.Cryptography.DESCryptoServiceProvider();
Byte[] inputByteArray = System.Text.Encoding.Default.GetBytes(str);
des.Key = System.Text.ASCIIEncoding.ASCII.GetBytes(strDesKey);
des.IV = System.Text.ASCIIEncoding.ASCII.GetBytes(strDesKey);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, des.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.StringBuilder sb = new System.Text.StringBuilder();
foreach (Byte b in ms.ToArray())
{
sb.AppendFormat("{0:X2}", b);
}
return(sb.ToString());
}
catch (System.Exception ex)
{
return("");
}
}
/// <summary>
/// AES 解密 Byte -> String
/// </summary>
/// <param name="cipherText"></param>
/// <param name="key"></param>
/// <param name="iv"></param>
/// <returns></returns>
public static string ByteAesDecToString(byte[] cipherText, string key, string iv)
{
#region AES 解密 Byte -> String
// 检查参数
if (cipherText.IsEmptyBytes()) return null;
if (key.IsNullOrEmptyOrSpace()) return null;
if (iv.IsNullOrEmptyOrSpace()) return null;
// 合成密钥
var deckey = StringMd5ShaToString(false, string.Format("<{0}/>{1}</{2}>[{3}]", iv, key, iv, EnDecryptConst),
16, false, 1, System.Text.Encoding.UTF8);
var deciv = StringMd5ShaToString(false, string.Format("[{0}/]{1}[/{2}]<{3}>", iv, key, iv, EnDecryptConst),
16, false, 1, System.Text.Encoding.UTF8);
// 转换参数
var keybyte = System.Text.Encoding.UTF8.GetBytes(deckey);
if (keybyte.Length <= 0)
return null;
var ivbyte = System.Text.Encoding.UTF8.GetBytes(deciv);
if (ivbyte.Length <= 0)
return null;
// 存储解密结果
string plaintext;
// 创建一个解密对象
using (var aesAlg = new System.Security.Cryptography.AesManaged())
{
aesAlg.Key = keybyte;
aesAlg.IV = ivbyte;
// 创建一个解密对象
var decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// 创建一个解密内存流
try
{
using (var msDecrypt = new System.IO.MemoryStream(cipherText))
{
using (
var csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor,
System.Security.Cryptography
.CryptoStreamMode.Read))
{
using (var srDecrypt = new System.IO.StreamReader(csDecrypt))
{
// 得到String
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
catch
{
return null;
}
}
// 返回String
return plaintext;
#endregion
}
public override void init(){
try
{
//md=MessageDigest.getInstance("SHA-1");
md=new System.Security.Cryptography.SHA1CryptoServiceProvider();
cs = new System.Security.Cryptography.CryptoStream( System.IO.Stream.Null, md, System.Security.Cryptography.CryptoStreamMode.Write);
}
catch(Exception e){
Console.WriteLine(e);
}
}
/// <summary>
/// 根据给定的字符串对其进行加密
/// </summary>
/// <param name="input">需要加密的字符串</param>
/// <returns>加密后的字符串</returns>
public static string Encrypt(string input)
{
// 盐值
string saltValue = "saltValue";
// 密码值
string pwdValue = "pwdValue";
byte[] data = System.Text.UTF8Encoding.UTF8.GetBytes(input);
byte[] salt = System.Text.UTF8Encoding.UTF8.GetBytes(saltValue);
// AesManaged - 高级加密标准(AES) 对称算法的管理类
System.Security.Cryptography.AesManaged aes = new System.Security.Cryptography.AesManaged();
// Rfc2898DeriveBytes - 通过使用基于 HMACSHA1 的伪随机数生成器，实现基于密码的密钥派生功能 (PBKDF2 - 一种基于密码的密钥派生函数)
// 通过 密码 和 salt 派生密钥
System.Security.Cryptography.Rfc2898DeriveBytes rfc = new System.Security.Cryptography.Rfc2898DeriveBytes(pwdValue, salt);
/**/
/*
* AesManaged.BlockSize - 加密操作的块大小（单位：bit）
* AesManaged.LegalBlockSizes - 对称算法支持的块大小（单位：bit）
* AesManaged.KeySize - 对称算法的密钥大小（单位：bit）
* AesManaged.LegalKeySizes - 对称算法支持的密钥大小（单位：bit）
* AesManaged.Key - 对称算法的密钥
* AesManaged.IV - 对称算法的密钥大小
* Rfc2898DeriveBytes.GetBytes(int 需要生成的伪随机密钥字节数) - 生成密钥
*/
aes.BlockSize = aes.LegalBlockSizes[0].MaxSize;
aes.KeySize = aes.LegalKeySizes[0].MaxSize;
aes.Key = rfc.GetBytes(aes.KeySize / 8);
aes.IV = rfc.GetBytes(aes.BlockSize / 8);
// 用当前的 Key 属性和初始化向量 IV 创建对称加密器对象
System.Security.Cryptography.ICryptoTransform encryptTransform = aes.CreateEncryptor();
// 加密后的输出流
System.IO.MemoryStream encryptStream = new System.IO.MemoryStream();
// 将加密后的目标流（encryptStream）与加密转换（encryptTransform）相连接
System.Security.Cryptography.CryptoStream encryptor = new System.Security.Cryptography.CryptoStream
(encryptStream, encryptTransform, System.Security.Cryptography.CryptoStreamMode.Write);
// 将一个字节序列写入当前 CryptoStream （完成加密的过程）
encryptor.Write(data, 0, data.Length);
encryptor.Close();
// 将加密后所得到的流转换成字节数组，再用Base64编码将其转换为字符串
string encryptedString = Convert.ToBase64String(encryptStream.ToArray());
return encryptedString;
}
public void init(byte[] key)
{
if (key.Length > 20)
{
byte[] tmp = new byte[20];
Array.Copy(key, 0, tmp, 0, 20);
key = tmp;
}
// SecretKeySpec skey=new SecretKeySpec(key, "HmacSHA1");
// mac=Mac.getInstance("HmacSHA1");
// mac.init(skey);
mentalis_mac = new System.Security.Cryptography.HMACMD5(key);
cs = new System.Security.Cryptography.CryptoStream(System.IO.Stream.Null, mentalis_mac, System.Security.Cryptography.CryptoStreamMode.Write);
}
/// <summary>
/// 从加密的密钥交换数据中提取机密信息<br/>
/// </summary>
/// <param name="str">被加密的字符串</param>
/// <param name="key">密钥</param>
/// <returns>还原的字符串</returns>
public static string DecryptString(string str, string key)
{
try
{
//义访问数据加密标准 (DES) 算法的加密服务提供程序 (CSP) 版本的包装对象.
System.Security.Cryptography.DESCryptoServiceProvider des =
new System.Security.Cryptography.DESCryptoServiceProvider();
//对密钥进行编码.
byte[] bytesKey = System.Text.Encoding.UTF8.GetBytes(key);
//初始化机密适配器..
des.Key = ResizeBytesArray(bytesKey, des.Key.Length);
des.IV = ResizeBytesArray(bytesKey, des.IV.Length);
//返回由以 64 为基的二进制数组
byte[] bytesIn = System.Convert.FromBase64String(str);
System.IO.MemoryStream msIn =
new System.IO.MemoryStream(bytesIn);
//定义基本的加密转换运算.
System.Security.Cryptography.ICryptoTransform desdecrypt =
des.CreateDecryptor();
//定义将数据流链接到加密转换的流。.
System.Security.Cryptography.CryptoStream cryptStreem =
new System.Security.Cryptography.CryptoStream(msIn,
desdecrypt,
System.Security.Cryptography.CryptoStreamMode.Read);
//以UTF8编码从字节流中读取字符.
System.IO.StreamReader srOut =
new System.IO.StreamReader(cryptStreem, System.Text.Encoding.UTF8);
//以UTF8编码从字节流中读取字符.
string result = srOut.ReadToEnd();
srOut.Close();
cryptStreem.Close();
msIn.Close();
return result;
}
catch (Exception ep)
{
throw (ep);
// return "";
}
}
public void init(byte[] key)
{
if(key.Length>16)
{
byte[] tmp=new byte[16];
Array.Copy(key, 0, tmp, 0, 16);
key=tmp;
}
// SecretKeySpec skey=new SecretKeySpec(key, "HmacMD5");
// mac=Mac.getInstance("HmacMD5");
// mac.init(skey);
mentalis_mac = new Org.Mentalis.Security.Cryptography.HMAC(new System.Security.Cryptography.MD5CryptoServiceProvider(), key);
cs = new System.Security.Cryptography.CryptoStream( System.IO.Stream.Null, mentalis_mac, System.Security.Cryptography.CryptoStreamMode.Write);
}
/// <summary>
/// Encripcion Byte Key IV
/// </summary>
/// <param name="clearData">Datos en limpio</param>
/// <param name="Key">Llave</param>
/// <param name="IV">IV</param>
/// <returns>Arreglo de byte's.</returns>
private static byte[] Encrypt(byte[] clearData, byte[] Key, byte[] IV)
{
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.Rijndael alg;
alg = System.Security.Cryptography.Rijndael.Create();
alg.Key = Key;
alg.IV = IV;
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, alg.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(clearData, 0, clearData.Length);
cs.Close();
byte[] encryptedData = ms.ToArray();
return encryptedData;
}
public static MemoryStream EncryptStream(string key, byte[] content)
{
System.Security.Cryptography.SymmetricAlgorithm rijn = System.Security.Cryptography.SymmetricAlgorithm.Create();
using (MemoryStream ms = new MemoryStream())
{
byte[] rgbIV = Encoding.ASCII.GetBytes("polychorepolycho");
byte[] rgbKey = Encoding.ASCII.GetBytes(key);
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, rijn.CreateEncryptor(rgbKey, rgbIV), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(content, 0, content.Length);
cs.Close();
return ms;
}
}
public static string Decrypt_Aes(this object value, string aesKey, string aesIV)
{
byte[] cipherText = GetBytes(value as string);
byte[] Key = GetBytes(aesKey);
byte[] IV = GetBytes(aesIV);
// Check arguments.
if (cipherText == null || cipherText.Length <= 0)
throw new ArgumentNullException("cipherText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
// Create an AesCryptoServiceProvider object
// with the specified key and IV.
using (System.Security.Cryptography.AesCryptoServiceProvider aesAlg = new System.Security.Cryptography.AesCryptoServiceProvider())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (System.Security.Cryptography.CryptoStream csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
public static string DeCrypt(string strEncryptedInput)
{
string strReturnValue = null;
if (string.IsNullOrEmpty(strEncryptedInput))
{
throw new System.ArgumentNullException("strEncryptedInput", "strEncryptedInput may not be string.Empty or NULL, because these are invid values.");
}
// Dim encASCII As New System.Text.ASCIIEncoding()
System.Text.Encoding enc = System.Text.Encoding.UTF8;
System.Security.Cryptography.RijndaelManaged objRijndael = new System.Security.Cryptography.RijndaelManaged();
byte[] baCipherTextBuffer = HexStringToByteArray(strEncryptedInput);
byte[] baDecryptionKey = HexStringToByteArray(strKey);
byte[] baInitializationVector = HexStringToByteArray(strIV);
// This is where the message would be transmitted to a recipient
// who already knows your secret key. Optionally, you can
// also encrypt your secret key using a public key algorithm
// and pass it to the mesage recipient along with the RijnDael
// encrypted message.
//Get a decryptor that uses the same key and IV as the encryptor.
System.Security.Cryptography.ICryptoTransform ifaceAESdecryptor = objRijndael.CreateDecryptor(baDecryptionKey, baInitializationVector);
//Now decrypt the previously encrypted message using the decryptor
// obtained in the above step.
System.IO.MemoryStream msDecrypt = new System.IO.MemoryStream(baCipherTextBuffer);
System.Security.Cryptography.CryptoStream csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, ifaceAESdecryptor, System.Security.Cryptography.CryptoStreamMode.Read);
//Dim baPlainTextBuffer() As Byte
//baPlainTextBuffer = New Byte(baCipherTextBuffer.Length) {}
byte[] baPlainTextBuffer = new byte[baCipherTextBuffer.Length + 1];
//Read the data out of the crypto stream.
csDecrypt.Read(baPlainTextBuffer, 0, baPlainTextBuffer.Length);
//Convert the byte array back into a string.
strReturnValue = enc.GetString(baPlainTextBuffer);
if (!string.IsNullOrEmpty(strReturnValue))
strReturnValue = strReturnValue.Trim('\0');
return strReturnValue;
}
/// <summary>
/// 解密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
private static string Decrypt(string Text, string sKey)
{
try
{
System.Security.Cryptography.DESCryptoServiceProvider des = new System.Security.Cryptography.DESCryptoServiceProvider();
int len;
len = Text.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream cs = new System.Security.Cryptography.CryptoStream(ms, des.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Encoding.Default.GetString(ms.ToArray());
}
catch
{
return Text;
}
}
public static string Decrypt(string cipherString)
{
byte[] cipherText = Convert.FromBase64String(cipherString);
// Check arguments.
if (cipherText == null || cipherText.Length <= 0)
throw new ArgumentNullException("cipherText");
if (aesProperties.Key == null || aesProperties.Key.Length <= 0)
throw new ArgumentNullException("Key");
if (aesProperties.InitializationVector == null || aesProperties.InitializationVector.Length <= 0)
throw new ArgumentNullException("Key");
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = aesProperties.Key;
aesAlg.IV = aesProperties.InitializationVector;
// Create a decrytor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (System.Security.Cryptography.CryptoStream csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
/// <summary>
///
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static string Decrypt(string input)
{
byte[] encryptBytes = Convert.FromBase64String(input);
byte[] salt = Encoding.UTF8.GetBytes(saltValue);
System.Security.Cryptography.AesManaged aes = new System.Security.Cryptography.AesManaged();
System.Security.Cryptography.Rfc2898DeriveBytes rfc = new System.Security.Cryptography.Rfc2898DeriveBytes(pwdValue, salt);
aes.BlockSize = aes.LegalBlockSizes[0].MaxSize;
aes.KeySize = aes.LegalKeySizes[0].MaxSize;
aes.Key = rfc.GetBytes(aes.KeySize / 8);
aes.IV = rfc.GetBytes(aes.BlockSize / 8);
System.Security.Cryptography.ICryptoTransform transform = aes.CreateDecryptor();
System.IO.MemoryStream stream = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream decryptor = new System.Security.Cryptography.CryptoStream
(stream, transform, System.Security.Cryptography.CryptoStreamMode.Write);
decryptor.Write(encryptBytes, 0, encryptBytes.Length);
decryptor.Close();
byte[] decryptBytes = stream.ToArray();
return UTF8Encoding.UTF8.GetString(decryptBytes, 0, decryptBytes.Length);
}
public static string Decrypt_Des(this object value, string desKey, string desIV)
{
string cryptedString = value as string;
byte[] Key = GetBytes(desKey);
byte[] IV = GetBytes(desIV);
// Check arguments.
if (string.IsNullOrEmpty(cryptedString))
throw new ArgumentNullException("cipherText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
System.Security.Cryptography.DESCryptoServiceProvider cryptoProvider = new System.Security.Cryptography.DESCryptoServiceProvider();
MemoryStream memoryStream = new MemoryStream(Convert.FromBase64String(cryptedString));
System.Security.Cryptography.CryptoStream cryptoStream
= new System.Security.Cryptography.CryptoStream(memoryStream,
cryptoProvider.CreateDecryptor(Key, IV),
System.Security.Cryptography.CryptoStreamMode.Read);
StreamReader reader = new StreamReader(cryptoStream);
return reader.ReadToEnd();
}
/// <summary>
///
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static string Encrypt(string input)
{
byte[] data = System.Text.UTF8Encoding.UTF8.GetBytes(input);
byte[] salt = System.Text.UTF8Encoding.UTF8.GetBytes(saltValue);
System.Security.Cryptography.AesManaged aes = new System.Security.Cryptography.AesManaged();
System.Security.Cryptography.Rfc2898DeriveBytes rfc = new System.Security.Cryptography.Rfc2898DeriveBytes(pwdValue, salt);
aes.BlockSize = aes.LegalBlockSizes[0].MaxSize;
aes.KeySize = aes.LegalKeySizes[0].MaxSize;
aes.Key = rfc.GetBytes(aes.KeySize / 8);
aes.IV = rfc.GetBytes(aes.BlockSize / 8);
System.Security.Cryptography.ICryptoTransform encrypt = aes.CreateEncryptor();
System.IO.MemoryStream stream = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream encryptor = new System.Security.Cryptography.CryptoStream
(stream, encrypt, System.Security.Cryptography.CryptoStreamMode.Write);
encryptor.Write(data, 0, data.Length);
encryptor.Close();
return Convert.ToBase64String(stream.ToArray());
}
/// <summary>
/// 暗号化された文字列を復号化する
/// </summary>
/// <param name="str">暗号化された文字列</param>
/// <param name="key">パスワード</param>
/// <returns>復号化された文字列</returns>
public static string DecryptString(string str, string key)
{
//DESCryptoServiceProviderオブジェクトの作成
var des = new System.Security.Cryptography.DESCryptoServiceProvider();
// 共有キーと初期化ベクタを決定
// パスワードをバイト配列にする
var bytesKey = System.Text.Encoding.UTF8.GetBytes(key);
// 共有キーと初期化ベクタを設定
des.Key = ResizeBytesArray(bytesKey, des.Key.Length);
des.IV = ResizeBytesArray(bytesKey, des.IV.Length);
// Base64で文字列をバイト配列に戻す
var bytesIn = System.Convert.FromBase64String(str);
// 暗号化されたデータを読み込むためのMemoryStream
var msIn = new System.IO.MemoryStream(bytesIn);
// DES復号化オブジェクトの作成
var desdecrypt = des.CreateDecryptor();
// 読み込むためのCryptoStreamの作成
var cryptStreem = new System.Security.Cryptography.CryptoStream(msIn, desdecrypt, System.Security.Cryptography.CryptoStreamMode.Read);
// 復号化されたデータを取得するためのStreamReader
var srOut = new System.IO.StreamReader(cryptStreem, System.Text.Encoding.UTF8);
// 復号化されたデータを取得する
var result = srOut.ReadToEnd();
// 閉じる
srOut.Close();
cryptStreem.Close();
msIn.Close();
return result;
}
private static byte[] Encrypt(byte[] cipherKey, byte[] plaintext)
{
var cipher = new System.Security.Cryptography.AesManaged();
cipher.Key = cipherKey;
cipher.Mode = System.Security.Cryptography.CipherMode.CBC;
cipher.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
using (var ms = new System.IO.MemoryStream())
{
using (var cs = new System.Security.Cryptography.CryptoStream(
ms, cipher.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(plaintext, 0, plaintext.Length);
}
var ciphertext = ms.ToArray();
var message = new byte[cipher.IV.Length + ciphertext.Length];
cipher.IV.CopyTo(message, 0);
ciphertext.CopyTo(message, cipher.IV.Length);
return message;
}
}
///
/// <summary>
/// AES 加密 String -> Byte
/// </summary>
/// <param name="plainText"></param>
/// <param name="key"></param>
/// <param name="iv"></param>
/// <returns></returns>
public static byte[] StringAesEncToByte(string plainText, string key, string iv)
{
#region AES 加密 String -> Byte
// 检查参数
if (string.IsNullOrEmpty(plainText))
return null;
if (string.IsNullOrEmpty(key))
return null;
if (string.IsNullOrEmpty(iv))
return null;
// 合成密钥
var enckey = StringMd5ShaToString(false, string.Format("<{0}/>{1}</{2}>[{3}]", iv, key, iv, EnDecryptConst),
16, false, 1, System.Text.Encoding.UTF8);
var enciv = StringMd5ShaToString(false, string.Format("[{0}/]{1}[/{2}]<{3}>", iv, key, iv, EnDecryptConst),
16, false, 1, System.Text.Encoding.UTF8);
// 转换密钥
var keybyte = System.Text.Encoding.UTF8.GetBytes(enckey);
if (keybyte.Length <= 0)
return null;
var ivbyte = System.Text.Encoding.UTF8.GetBytes(enciv);
if (ivbyte.Length <= 0)
return null;
byte[] encrypted;
// 创建一个加密对象
using (var aesAlg = new System.Security.Cryptography.AesManaged())
{
aesAlg.Key = keybyte;
aesAlg.IV = ivbyte;
// 创建一个加密来执行流的转换
var encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// 为加密创建一个内存流
try
{
using (var msEncrypt = new System.IO.MemoryStream())
{
using (
var csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor,
System.Security.Cryptography
.CryptoStreamMode.Write)
)
{
using (var swEncrypt = new System.IO.StreamWriter(csEncrypt))
{
// 把所有数据写进流
swEncrypt.Write(plainText);
}
// 把内存流转换为字节数组
encrypted = msEncrypt.ToArray();
}
}
}
catch
{
return null;
}
}
// 返回此加密字节
return encrypted;
#endregion
}
public static string Encrypt(string strPlainText)
{
//Dim roundtrip As String
//Dim encASCII As New System.Text.ASCIIEncoding()
System.Text.Encoding enc = System.Text.Encoding.UTF8;
System.Security.Cryptography.RijndaelManaged objRijndael = new System.Security.Cryptography.RijndaelManaged();
//Dim fromEncrypt() As Byte
byte[] baCipherTextBuffer = null;
byte[] baPlainTextBuffer = null;
byte[] baEncryptionKey = null;
byte[] baInitializationVector = null;
//Create a new key and initialization vector.
//objRijndael.GenerateKey()
//objRijndael.GenerateIV()
objRijndael.Key = HexStringToByteArray(strKey);
objRijndael.IV = HexStringToByteArray(strIV);
//Get the key and initialization vector.
baEncryptionKey = objRijndael.Key;
baInitializationVector = objRijndael.IV;
//strKey = ByteArrayToHexString(baEncryptionKey)
//strIV = ByteArrayToHexString(baInitializationVector)
//Get an encryptor.
System.Security.Cryptography.ICryptoTransform ifaceAESencryptor = objRijndael.CreateEncryptor(baEncryptionKey, baInitializationVector);
//Encrypt the data.
System.IO.MemoryStream msEncrypt = new System.IO.MemoryStream();
System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, ifaceAESencryptor, System.Security.Cryptography.CryptoStreamMode.Write);
//Convert the data to a byte array.
baPlainTextBuffer = enc.GetBytes(strPlainText);
//Write all data to the crypto stream and flush it.
csEncrypt.Write(baPlainTextBuffer, 0, baPlainTextBuffer.Length);
csEncrypt.FlushFinalBlock();
//Get encrypted array of bytes.
baCipherTextBuffer = msEncrypt.ToArray();
return ByteArrayToHexString(baCipherTextBuffer);
}
public static string Decrypt(string CipherText, string Password,
string Salt, string HashAlgorithm,
int PasswordIterations = 2, string InitialVector = "OFRna73m*aze01xY",
int KeySize = 256)
{
if (string.IsNullOrEmpty(CipherText))
return "";
byte[] InitialVectorBytes = Encoding.ASCII.GetBytes(InitialVector);
byte[] SaltValueBytes = Encoding.ASCII.GetBytes(Salt);
byte[] CipherTextBytes = Convert.FromBase64String(CipherText);
System.Security.Cryptography.PasswordDeriveBytes DerivedPassword = new System.Security.Cryptography.PasswordDeriveBytes(Password, SaltValueBytes, HashAlgorithm, PasswordIterations);
byte[] KeyBytes = DerivedPassword.GetBytes(KeySize / 8);
System.Security.Cryptography.RijndaelManaged SymmetricKey = new System.Security.Cryptography.RijndaelManaged();
SymmetricKey.Mode = System.Security.Cryptography.CipherMode.CBC;
byte[] PlainTextBytes = new byte[CipherTextBytes.Length];
int ByteCount = 0;
using (System.Security.Cryptography.ICryptoTransform Decryptor = SymmetricKey.CreateDecryptor(KeyBytes, InitialVectorBytes))
{
using (MemoryStream MemStream = new MemoryStream(CipherTextBytes))
{
using (System.Security.Cryptography.CryptoStream CryptoStream = new System.Security.Cryptography.CryptoStream(MemStream, Decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
ByteCount = CryptoStream.Read(PlainTextBytes, 0, PlainTextBytes.Length);
MemStream.Close();
CryptoStream.Close();
}
}
}
SymmetricKey.Clear();
return Encoding.UTF8.GetString(PlainTextBytes, 0, ByteCount);
}
public static string Encrypt(string plainText)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (aesProperties.Key == null || aesProperties.Key.Length <= 0)
throw new ArgumentNullException("Key");
if (aesProperties.InitializationVector == null || aesProperties.InitializationVector.Length <= 0)
throw new ArgumentNullException("Key");
// Create an Aes object
// with the specified key and IV.
byte[] encrypted = null;
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = aesProperties.Key;
aesAlg.IV = aesProperties.InitializationVector;
// Create a decrytor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
return Convert.ToBase64String(encrypted);
}
/// <summary>
/// Descriptografa um array de bytes em outro array de bytes.
/// </summary>
/// <returns>Array de bytes descriptografado.</returns>
/// <param name="p_ciphertextbytes">Array de bytes criptografado.</param>
public byte[] DecryptToBytes(byte[] p_ciphertextbytes)
{
byte[] v_plaintextbytes;
byte[] v_decryptedbytes;
int v_decryptedbytecount;
int v_saltlength;
System.IO.MemoryStream v_memory;
System.Security.Cryptography.CryptoStream v_crypto;
try
{
this.Initialize();
v_memory = new System.IO.MemoryStream(p_ciphertextbytes);
v_decryptedbytes = new byte[p_ciphertextbytes.Length];
lock (this)
{
v_crypto = new System.Security.Cryptography.CryptoStream(v_memory, this.v_decryptor, System.Security.Cryptography.CryptoStreamMode.Read);
v_decryptedbytecount = v_crypto.Read(v_decryptedbytes, 0, v_decryptedbytes.Length);
v_memory.Close();
v_crypto.Close();
}
v_saltlength = (v_decryptedbytes[0] & 0x03) |
(v_decryptedbytes[1] & 0x0c) |
(v_decryptedbytes[2] & 0x30) |
(v_decryptedbytes[3] & 0xc0);
v_plaintextbytes = new byte[v_decryptedbytecount - v_saltlength];
System.Array.Copy(v_decryptedbytes, v_saltlength, v_plaintextbytes, 0, v_decryptedbytecount - v_saltlength);
return v_plaintextbytes;
}
catch (System.Security.Cryptography.CryptographicException e)
{
throw new Spartacus.Utils.Exception(e);
}
}
/// <summary>
/// Criptografa um array de bytes em outro array de bytes.
/// </summary>
/// <returns>Array de bytes criptografado.</returns>
/// <param name="p_plaintextbytes">Array de bytes.</param>
public byte[] EncryptToBytes(byte[] p_plaintextbytes)
{
byte[] v_ciphertextbytes;
byte[] v_plaintextbyteswithsalt;
System.IO.MemoryStream v_memory;
System.Security.Cryptography.CryptoStream v_crypto;
this.Initialize();
v_plaintextbyteswithsalt = this.AddSalt(p_plaintextbytes);
v_memory = new System.IO.MemoryStream();
lock (this)
{
v_crypto = new System.Security.Cryptography.CryptoStream(v_memory, this.v_encryptor, System.Security.Cryptography.CryptoStreamMode.Write);
v_crypto.Write(v_plaintextbyteswithsalt, 0, v_plaintextbyteswithsalt.Length);
v_crypto.FlushFinalBlock();
v_ciphertextbytes = v_memory.ToArray();
v_memory.Close();
v_crypto.Close();
return v_ciphertextbytes;
}
}
bool ProcessEncryptionPwd()
{
System.Security.Cryptography.Rfc2898DeriveBytes pbkdf2 = null;
if (tbEncryptionPwd.Text == "[UNCHANGED]") // Password hasn't changed from when the package was loaded
return true;
if (string.IsNullOrEmpty(tbEncryptionPwd.Text))
return true; // Nothing to do really
if (!string.IsNullOrEmpty(virtPackage.GetProperty("EncryptionPwdKey")) &&
!string.IsNullOrEmpty(virtPackage.GetProperty("EncryptionPwdHash")) &&
!string.IsNullOrEmpty(virtPackage.GetProperty("EncryptionPwdSalt")) &&
!string.IsNullOrEmpty(virtPackage.GetProperty("EncryptionPwdIV")))
{
// EncryptionPwd* properties are already set. Only need to re-generate them if password has changed (different from EncryptionPwdHash)
string pwdSaltStr = virtPackage.GetProperty("EncryptionPwdSalt");
var pwdSalt = Utils.HexUndump(pwdSaltStr);
// Check if password is unchanged
// PBKDF2 first time on entered password
pbkdf2 = new System.Security.Cryptography.Rfc2898DeriveBytes(tbEncryptionPwd.Text, pwdSalt, Pbkdf2Iterations);
var enteredPwdHash = pbkdf2.GetBytes(KeySizeBytes);
// PBKDF2 second time on entered password
pbkdf2 = new System.Security.Cryptography.Rfc2898DeriveBytes(enteredPwdHash, pwdSalt, Pbkdf2Iterations);
enteredPwdHash = pbkdf2.GetBytes(KeySizeBytes);
var savedPwdHash = Utils.HexUndump(virtPackage.GetProperty("EncryptionPwdHash"));
bool equals = true;
for (int i = 0; i < enteredPwdHash.Length; i++)
{
if (enteredPwdHash[i] != savedPwdHash[i])
equals = false;
}
if (equals)
return true; // Password hasn't changed
}
bool Ret = true;
var rngCsp = new System.Security.Cryptography.RNGCryptoServiceProvider();
// Steps for password-based key:
// 1. Generate a long key (this is just a randomly generated amount of bytes in hex, you can use 128 bytes).
// Use this key to encrypt your file with AES (meaning you use it as a password)
byte[] randomKey = new byte[KeySizeBytes]; // Our AES algorithm uses a 128-bit key (16 bytes)
rngCsp.GetBytes(randomKey); // <-- The key with which files will be encrypted / decrypted
// 2. Encrypt the key itself with AES using your password (which is a bit shorter but easier to remember.
// Now AES requires this again to be either 128, 192 or 256 bits of length so you need to make your
// password of that length. Hence you can just use PBKDF2 (or scrypt or bcrypt) to create a fixed key
// length from your password. DO NOT STORE THIS.
byte[] salt = new byte[SaltSize];
rngCsp.GetBytes(salt);
// Transform user password into a key that we can encrypt randomKey with
pbkdf2 = new System.Security.Cryptography.Rfc2898DeriveBytes(Encoding.ASCII.GetBytes(tbEncryptionPwd.Text), salt, Pbkdf2Iterations);
var keyEncryptionKey = pbkdf2.GetBytes(KeySizeBytes); // tbEncryptionPwd.Text -> Key. This key will be used for encrypting randomKey.
var keyEncryptor = new System.Security.Cryptography.RijndaelManaged();
keyEncryptor.BlockSize = 128;
keyEncryptor.Mode = System.Security.Cryptography.CipherMode.CFB;
keyEncryptor.Padding = System.Security.Cryptography.PaddingMode.None;
keyEncryptor.Key = keyEncryptionKey;
keyEncryptor.GenerateIV();
var encryptor = keyEncryptor.CreateEncryptor(keyEncryptor.Key, keyEncryptor.IV);
var msEncrypt = new MemoryStream();
using (var csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
using (var swEncrypt = new BinaryWriter(csEncrypt))
{
byte[] toWrite = randomKey;//Encoding.ASCII.GetBytes("1234567890123456");
swEncrypt.Write(toWrite);
}
}
var encryptedKey = msEncrypt.ToArray(); // <-- randomKey encrypted with AES, whose key = PBKDF2(tbEncryptionPwd.Text)
// 3. Keep a hash of your hashed password using PBKDF2 (or bcrypt or scrypt). This will allow you to check
// if the password is correct before trying to decrypt your encrypted key:
// hash(hash(password)) --> can be stored
// hash(password) --> should not be stored
pbkdf2 = new System.Security.Cryptography.Rfc2898DeriveBytes(keyEncryptionKey, salt, Pbkdf2Iterations); // Iterations slow down hashing (which helps against brute-force)
var keyEncryptionKeyHashed = pbkdf2.GetBytes(KeySizeBytes); // Second PBKDF2 hash
// Store
Ret &= virtPackage.SetProperty("EncryptionPwdKey", Utils.HexDump(encryptedKey)); // Encryption key, in encrypted form
Ret &= virtPackage.SetProperty("EncryptionPwdHash", Utils.HexDump(keyEncryptionKeyHashed)); // Password hash, for user password validation
Ret &= virtPackage.SetProperty("EncryptionPwdSalt", Utils.HexDump(salt)); // Salt used for both PBKDF2 password hashes (first and second)
Ret &= virtPackage.SetProperty("EncryptionPwdIV", Utils.HexDump(keyEncryptor.IV)); // IV used for encrypting the key with AES
return Ret;
}
