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());
}
}
}
}
} // End Function Encrypt
public string DeCrypt(string encryptedInput)
{
string returnValue = null;
if (string.IsNullOrEmpty(encryptedInput))
{
throw new System.ArgumentNullException("encryptedInput", "encryptedInput may not be string.Empty or NULL, because these are invid values.");
}
using (System.Security.Cryptography.Aes objRijndael = System.Security.Cryptography.Aes.Create())
{
byte[] baCipherTextBuffer = HexStringToByteArray(encryptedInput);
byte[] baDecryptionKey = HexStringToByteArray(this.m_key);
byte[] baInitializationVector = HexStringToByteArray(this.m_iv);
// 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.
using (System.Security.Cryptography.ICryptoTransform transform = objRijndael.CreateDecryptor(baDecryptionKey, baInitializationVector))
{
//Now decrypt the previously encrypted message using the decryptor
// obtained in the above step.
using (System.IO.MemoryStream msDecrypt = new System.IO.MemoryStream(baCipherTextBuffer))
{
using (System.Security.Cryptography.CryptoStream csDecrypt =
new System.Security.Cryptography.CryptoStream(
msDecrypt
, transform
, System.Security.Cryptography.CryptoStreamMode.Read)
)
{
byte[] baPlainTextBuffer = new byte[baCipherTextBuffer.Length];
//Read the data out of the crypto stream.
csDecrypt.Read(baPlainTextBuffer, 0, baPlainTextBuffer.Length);
//Convert the byte array back into a string.
returnValue = this.m_encoding.GetString(baPlainTextBuffer);
System.Array.Clear(baPlainTextBuffer, 0, baPlainTextBuffer.Length);
baPlainTextBuffer = null;
if (!string.IsNullOrEmpty(returnValue))
{
returnValue = returnValue.Trim('\0');
}
csDecrypt.Clear();
} // End Using csDecrypt
} // End Using msDecrypt
} // End Using transform
} // End Using aes
return(returnValue);
} // End Function DeCrypt
/// <summary>
/// 解密（二进制）
/// </summary>
/// <param name="data">需要解密的数据。</param>
/// <param name="password">密钥</param>
/// <returns></returns>
public static byte[] Decrypt(byte[] data, byte[] password)
{
#if netcore
System.Security.Cryptography.Aes aes = System.Security.Cryptography.Aes.Create();
#else
System.Security.Cryptography.Aes aes = System.Security.Cryptography.Aes.Create("AES");
#endif
aes.Mode = System.Security.Cryptography.CipherMode.ECB;
aes.Key = password;
System.Security.Cryptography.ICryptoTransform encryptor = aes.CreateDecryptor();
return(encryptor.TransformFinalBlock(data, 0, data.Length));
}
internal static byte[] AES256Decrypt(byte[] block, byte[] key)
{
using (System.Security.Cryptography.Aes aes = System.Security.Cryptography.Aes.Create())
{
aes.Key = key;
aes.Mode = System.Security.Cryptography.CipherMode.ECB;
aes.Padding = System.Security.Cryptography.PaddingMode.None;
using (System.Security.Cryptography.ICryptoTransform decryptor = aes.CreateDecryptor())
{
return(decryptor.TransformFinalBlock(block, 0, block.Length));
}
}
}
} // End Function Encrypt
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.");
}
// System.Text.Encoding enc = System.Text.Encoding.ASCII;
System.Text.Encoding enc = System.Text.Encoding.UTF8;
using (System.Security.Cryptography.Aes aes = System.Security.Cryptography.Aes.Create())
{
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 = aes.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);
// byte[] baPlainTextBuffer
// 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);
} // End Function DeCrypt
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);
}
//복호화
public static byte[] Decrypt(byte[] cipherText, byte[] Key, byte[] IV)
{
byte[] plainText;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.BlockSize = 128;
aesAlg.Key = Key;
aesAlg.IV = IV;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
System.Security.Cryptography.ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
plainText = decryptor.TransformFinalBlock(cipherText, 0, cipherText.Length);
}
return(plainText);
}
public byte[] Decrypt(byte[] inBytes)
{
return(Crypt(inBytes, aes.CreateDecryptor()));
}
public static string Decrypt(string cipherText, string encryptionKey)
{
try
{
if (cipherText == null)
{
return(string.Empty);
}
byte[] cipherBytes = HttpServerUtility.UrlTokenDecode(cipherText.ToString());
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.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipherText = System.Text.Encoding.Unicode.GetString(ms.ToArray());
}
}
}
catch
{
cipherText = string.Empty;
}
return(cipherText.ToString());
}
/// <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);
}
public static string Decrypt2(string cipherText, string encryptionKey)
{
byte[] cipherBytes = Convert.FromBase64String(cipherText);
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.CreateDecryptor(), System.Security.Cryptography.CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipherText = System.Text.Encoding.Unicode.GetString(ms.ToArray());
}
}
return(cipherText);
}
} // End Function Encrypt
public static string Decrypt(string encryptedInput)
{
string returnValue = null;
if (string.IsNullOrEmpty(encryptedInput))
{
return(encryptedInput);
}
// System.Text.Encoding enc = System.Text.Encoding.ASCII;
System.Text.Encoding enc = System.Text.Encoding.UTF8;
byte[] cipherTextBuffer = HexStringToByteArray(encryptedInput);
byte[] decryptionKey = HexStringToByteArray(s_key);
byte[] initializationVector = HexStringToByteArray(s_IV);
using (System.Security.Cryptography.Aes aes = System.Security.Cryptography.Aes.Create())
{
// 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.
using (System.Security.Cryptography.ICryptoTransform aesDecryptor = aes.CreateDecryptor(decryptionKey, initializationVector))
{
//Now decrypt the previously encrypted message using the decryptor
// obtained in the above step.
using (System.IO.MemoryStream msDecrypt = new System.IO.MemoryStream(cipherTextBuffer))
{
using (System.Security.Cryptography.CryptoStream csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, aesDecryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
//Dim baPlainTextBuffer() As Byte
//baPlainTextBuffer = New Byte(baCipherTextBuffer.Length) {}
byte[] baPlainTextBuffer = new byte[cipherTextBuffer.Length + 1];
//Read the data out of the crypto stream.
csDecrypt.Read(baPlainTextBuffer, 0, baPlainTextBuffer.Length);
//Convert the byte array back into a string.
returnValue = enc.GetString(baPlainTextBuffer);
if (!string.IsNullOrEmpty(returnValue))
{
returnValue = returnValue.Trim('\0');
}
} // End Using csDecrypt
} // End Using msDecrypt
} // End Using aesDecryptor
} // End Using aes
System.Array.Clear(cipherTextBuffer, 0, cipherTextBuffer.Length);
cipherTextBuffer = null;
System.Array.Clear(decryptionKey, 0, decryptionKey.Length);
decryptionKey = null;
System.Array.Clear(initializationVector, 0, initializationVector.Length);
initializationVector = null;
return(returnValue);
} // End Function DeCrypt
