public async Task GetDecryptionStreamAsync_WithNullEncryptionKey_Throws()
{
using (MemoryStream ms = new MemoryStream())
{
await Assert.ThrowsAsync <ArgumentNullException>(async() => await EncryptionHelpers.GetDecryptionStreamAsync(null, ms));
}
}
/// <summary>
/// Opens a read-only stream to the given blob path.
/// </summary>
public override async Task <Stream?> GetBlobReadStreamAsync(string path)
{
Stream?underlying = await base.GetBlobReadStreamAsync(path);
if (underlying == null)
{
return(null);
}
else
{
Stream seekable = new MemoryStream();
using (CryptographicStream s = await EncryptionHelpers.GetDecryptionStreamAsync(_encryptionKey, underlying))
{
await s.CopyToAsync(seekable);
seekable.Seek(0, SeekOrigin.Begin);
}
return(seekable);
}
}
public async Task GetDecryptionStreamAsync_WithValidData_WritesDecryptedData()
{
byte[] key = EncryptionHelpers.CreateEncryptionKey();
byte[] original = new byte[128];
new Random().NextBytes(original);
byte[] encrypted = await EncryptionHelpers.EncryptDataAsync(original, key);
byte[] result;
using (MemoryStream ms = new MemoryStream(encrypted))
using (MemoryStream output = new MemoryStream())
{
using (Stream stream = await EncryptionHelpers.GetDecryptionStreamAsync(key, ms))
{
await stream.CopyToAsync(output);
}
result = output.ToArray();
}
Assert.NotNull(result);
Assert.NotEmpty(result);
Assert.Equal(original, result);
}
public async Task GetDecryptionStreamAsync_WithNonReadableStream_Throws()
{
byte[] key = EncryptionHelpers.CreateEncryptionKey();
await Assert.ThrowsAsync <ArgumentOutOfRangeException>(async() => await EncryptionHelpers.GetDecryptionStreamAsync(key, new NonReadableStream()));
}
public async Task GetDecryptionStreamAsync_WithEmptyEncryptionKey_Throws()
{
using (MemoryStream ms = new MemoryStream())
{
await Assert.ThrowsAsync <ArgumentOutOfRangeException>(async() => await EncryptionHelpers.GetDecryptionStreamAsync(Array.Empty <byte>(), ms));
}
}
public async Task GetDecryptionStreamAsync_WithNullStream_Throws()
{
byte[] key = EncryptionHelpers.CreateEncryptionKey();
await Assert.ThrowsAsync <ArgumentNullException>(async() => await EncryptionHelpers.GetDecryptionStreamAsync(key, null));
}