/// <summary>
/// Transforms a file into its cryptographically strong equivalent using AES256 in CBC mode.
/// </summary>
/// <param name="originalFile">The path to the file to be cryptographically transformed.</param>
/// <param name="encryptedFile">The path where the new file will be created.</param>
/// <param name="password">The key to be used during the cryptographic transformation.</param>
/// <returns>A flag determining whether or not the operation was successful.</returns>
public static bool EncryptFile(string originalFile, string encryptedFile, string password)
{
try
{
string originalFilename = originalFile;
string encryptedFilename = encryptedFile;
using (var originalStream = LongFile.Open(originalFile, FileMode.Open))
using (var encryptedStream = LongFile.Create(encryptedFile, 8192))
using (var encTransform = new EtM_EncryptTransform(key: password.ToBytes()))
using (var crypoStream = new CryptoStream(encryptedStream, encTransform, CryptoStreamMode.Write))
{
originalStream.CopyTo(crypoStream);
}
return(true);
}
catch { return(false); }
}
/// <summary>
/// Asynchronously transforms a file into its cryptographically strong equivalent using AES256 in CBC mode.
/// </summary>
/// <param name="originalFile">The path to the file to be cryptographically transformed.</param>
/// <param name="encryptedFile">The path where the new file will be created.</param>
/// <param name="password">The key to be used during the cryptographic transformation.</param>
/// <returns>A flag determining whether or not the operation was successful.</returns>
public static async Task <bool> EncryptFileAsync(string originalFile, string encryptedFile, byte[] password)
{
try
{
string originalFilename = originalFile;
string encryptedFilename = encryptedFile;
using (var originalStream = LongFile.Open(originalFile, FileMode.Open))
using (var encryptedStream = LongFile.Create(encryptedFile, 8192))
using (var encTransform = new EtM_EncryptTransform(key: password))
using (var crypoStream = new CryptoStream(encryptedStream, encTransform, CryptoStreamMode.Write))
{
await originalStream.CopyToAsync(crypoStream);
return(true);
}
}
catch { return(false); }
}
