/// <summary>
/// Creates instance from encrypted data.
/// </summary>
/// <param name="encryptedData">Encrypted data to be decrypted.</param>
/// <param name="password">Password to generate key to encrypt and decrypt.</param>
/// <param name="salt">Salt to generate key.</param>
/// <param name="iterationCount">Iteration count to generate key.</param>
/// <param name="keySize">Key size in bit.</param>
/// <param name="cipherMode"><see cref="CipherMode"/>.</param>
/// <param name="paddingMode"><see cref="PaddingMode"/>.</param>
/// <returns>PBEProtectedString instance.</returns>
public static PBEProtectedString FromEncryptedData(byte[] encryptedData, byte[] password, byte[] salt, int iterationCount = 4096, int keySize = 256, CipherMode cipherMode = CipherMode.CBC, PaddingMode paddingMode = PaddingMode.PKCS7)
{
var ps = new PBEProtectedString(keySize, cipherMode, paddingMode);
ps.EncryptedData = encryptedData;
ps.Salt = salt;
ps.generateKey(password, iterationCount, BLOCK_SIZE);
return(ps);
}
/// <summary>
/// Creates instance from char array.
/// </summary>
/// <param name="chars">Char array to be encrypted.</param>
/// <param name="password">Password to generate key to encrypt and decrypt.</param>
/// <param name="saltLenght">Salt length to generate key.</param>
/// <param name="iterationCount">Iteration count to generate key.</param>
/// <param name="keySize">Key size in bit.</param>
/// <param name="cipherMode"><see cref="CipherMode"/>.</param>
/// <param name="paddingMode"><see cref="PaddingMode"/>.</param>
/// <returns>PBEProtectedString instance.</returns>
public static PBEProtectedString FromChars(char[] chars, byte[] password, int saltLenght = 128, int iterationCount = 4096, int keySize = 256, CipherMode cipherMode = CipherMode.CBC, PaddingMode paddingMode = PaddingMode.PKCS7)
{
var ps = new PBEProtectedString(keySize, cipherMode, paddingMode);
if (saltLenght > 0)
{
ps.Salt = RAND.NextBytes(saltLenght);
}
ps.generateKey(password, iterationCount, BLOCK_SIZE);
using (var aes = Aes.Create())
{
aes.KeySize = ps.keySize;
aes.BlockSize = BLOCK_SIZE;
aes.Mode = ps.cipherMode;
aes.Padding = ps.paddingMode;
aes.Key = ps.key;
aes.IV = ps.iv;
using (var memory = new MemoryStream())
{
using (var encryptor = aes.CreateEncryptor())
using (var stream = new CryptoStream(memory, encryptor, CryptoStreamMode.Write))
using (var writer = new StreamWriter(stream, ENCODING))
{
writer.Write(chars);
}
ps.EncryptedData = memory.ToArray();
}
}
return(ps);
}
