这是我的一段代码,旨在加密文件并将密文写入新文件。代码与微软MSDN网页上的示例相似。
byte[] inputBuffer = new byte[InputFileStream.Length];
byte[] outputBuffer = new byte[InputFileStream.Length];
InputFileStream.Read(inputBuffer, 0, (int)InputFileStream.Length);
ICryptoTransform encryptor = AesInstance.CreateEncryptor(AesInstance.Key, AesInstance.IV);
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream stream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter encrypted = new StreamWriter(stream))
{
encrypted.Write(inputBuffer);
}
outputBuffer = memoryStream.ToArray();
OutputFileStream.Write(outputBuffer, 0, (int)outputBuffer.Length);
}
}
OutputFileStream.Close();
InputFileStream.Close();`
问题在于输入缓冲区从文件中正确读取字节,但输出缓冲区似乎只有16个字节的数据。结果是输出文件只有16个字节,即使输入文件很大。哪里出了问题?问题存在于各种模式下,例如ECB、CBC等。