public static void Decrypt(FileStream plaintext, FileStream ciphertext, byte[] fileBytes, byte[] nonce, byte[] key, BackgroundWorker bgwDecryption)
{
NullChecks.FileEncryption(plaintext, ciphertext, fileBytes, nonce, key);
int bytesRead;
while ((bytesRead = ciphertext.Read(fileBytes, 0, fileBytes.Length)) > 0)
{
byte[] decryptedBytes = DecryptFileBytes(fileBytes, nonce, key);
plaintext.Write(decryptedBytes, 0, bytesRead);
// Report progress if decrypting a single file
ReportProgress.ReportEncryptionProgress(plaintext.Position, ciphertext.Length, bgwDecryption);
}
}
public static void DecryptAesCBC(FileStream plaintext, FileStream ciphertext, byte[] fileBytes, byte[] nonce, byte[] key, BackgroundWorker bgwDecryption)
{
NullChecks.FileEncryption(plaintext, ciphertext, fileBytes, nonce, key);
using (var aes = new AesCryptoServiceProvider()
{
Mode = _cbcMode, Padding = _pkcs7Padding
})
{
using (var cryptoStream = new CryptoStream(ciphertext, aes.CreateDecryptor(key, nonce), CryptoStreamMode.Read))
{
int bytesRead;
while ((bytesRead = cryptoStream.Read(fileBytes, 0, fileBytes.Length)) > 0)
{
plaintext.Write(fileBytes, 0, bytesRead);
// Report progress if encrypting a single file
ReportProgress.ReportEncryptionProgress(plaintext.Position, ciphertext.Length, bgwDecryption);
}
}
}
}