/// <summary>
/// Tests EncryptStream and DecryptStream using cloud storage. A single
/// file is uploaded in encrypted form and then downloaded.
/// </summary>
public void test_Encrypt_and_Decrypt_streams_on_cloud()
{
Console.WriteLine("About to upload a file to the cloud and download it back, "
+ "using EncryptStream and DecryptStream. Press any key to continue, or ESC to skip.\n");
if (hit_esc_key())
{
return;
}
var backup_services = create_cloud_backup_services_from_xml(cloud_backup_services_xml);
// Choose one of the "backup_services" for use in testing.
CloudBackupService backup_service = backup_services[2];
string bucket_name = "xxxxxxxx";
string original_file = @"E:\temp\temp\temp.bin";
string base_path = @"E:\temp\temp";
string relative_path = original_file.Substring(base_path.Length + 1);
string decrypted_file = @"E:\temp\temp2\temp.bin";
var encrypt_stream = new EncryptStream();
var decrypt_stream = new DecryptStream();
Random random = new Random();
byte[] buffer = new byte[1024];
// create random file
using (var fs = new FileStream(original_file, FileMode.Create, FileAccess.Write))
{
for (int j = 0; j < 640; j++)
{
random.NextBytes(buffer);
fs.Write(buffer, 0, buffer.Length);
}
}
// encrypted upload
Console.WriteLine("Encrypting and uploading file to the cloud.");
encrypt_stream.reset(original_file, relative_path, key);
backup_service.upload(encrypt_stream, bucket_name, "temp.bin");
Console.WriteLine("The file has been encrypted and uploaded to the cloud.");
Thread.Sleep(2000);
// download and decrypt
decrypt_stream.reset(key, full_path_request_handler);
// be sure the download can be done in pieces
backup_service.download(bucket_name, "temp.bin", decrypt_stream, 0, 1024);
Console.WriteLine("The first 1kB header says the pre-encrypt file size is "
+ file_pre_encrypt_size + " bytes.");
backup_service.download(bucket_name, "temp.bin", decrypt_stream, 1024, file_pre_encrypt_size);
decrypt_stream.Flush();
backup_service.delete(bucket_name, "temp.bin");
Debug.Assert(compare_files(original_file, decrypted_file));
Console.WriteLine("EncryptStream and DecryptStream has been tested using cloud storage.\n");
}
/// <summary>
/// Tests EncryptStream and DecryptStream using disk files. Different files
/// are encrypted and then decrypted, both with and without compression.
/// </summary>
public void test_Encrypt_and_Decrypt_streams_on_disk()
{
Console.WriteLine("About to test EncryptStream and DecryptStream using files on disk."
+ " Press any key to continue, or ESC to skip.\n");
if (hit_esc_key())
{
return;
}
// paths:
string original_file = @"E:\temp\temp\temp.bin";
string base_path = @"E:\temp\temp";
string relative_path = original_file.Substring(base_path.Length + 1);
string encrypted_file = @"E:\temp\temp2\temp_en.bin";
string decrypted_file = @"E:\temp\temp2\temp.bin";
var encrypt_stream = new EncryptStream();
var decrypt_stream = new DecryptStream();
Random random = new Random();
for (int i = 0; i < 5; i++)
{
bool do_not_compress = false;
// The different tests try different input files.
if (i == 0)
{
// zero byte file
using (var fs = new FileStream(original_file, FileMode.Create, FileAccess.Write)) { }
}
else if (i == 1)
{
// one byte file
using (var fs = new FileStream(original_file, FileMode.Create, FileAccess.Write))
fs.WriteByte((byte)(random.Next(0, 256)));
}
else if (i == 2 || i == 3)
{
// test #2: file with repetitive bytes
// test #3: file with repetitive bytes - no compression
if (i == 3)
{
do_not_compress = true;
}
byte[][] patterns = new byte[32][];
for (int j = 0; j < patterns.Length; j++)
{
patterns[j] = new byte[32];
random.NextBytes(patterns[j]);
}
using (var fs = new FileStream(original_file, FileMode.Create, FileAccess.Write))
{
for (int j = 0; j < 1024 * 10; j++)
{
int pattern_to_use = random.Next(0, 32);
fs.Write(patterns[pattern_to_use], 0, patterns[pattern_to_use].Length);
}
}
}
else if (i == 4)
{
// random file
byte[] buffer = new byte[1024];
using (var fs = new FileStream(original_file, FileMode.Create, FileAccess.Write))
{
for (int j = 0; j < 1024; j++)
{
random.NextBytes(buffer);
fs.Write(buffer, 0, buffer.Length);
}
}
}
// The rest of the test is the same - encrypt, decrypt, the compare files.
encrypt_stream.reset(original_file, relative_path, key, do_not_compress);
using (var output_fs = new FileStream(encrypted_file, FileMode.Create))
encrypt_stream.CopyTo(output_fs);
decrypt_stream.reset(key, full_path_request_handler);
using (var fs = new FileStream(encrypted_file, FileMode.Open))
fs.CopyTo(decrypt_stream);
decrypt_stream.Flush();
Debug.Assert(compare_files(original_file, decrypted_file));
}
Console.WriteLine("EncryptStream and DecryptStream tested using disk.\n");
}